Rear subframe assembly and vehicle

Abstract

A rear subframe assembly (100), comprising: a subframe and an electric drive assembly (101). The sub-frame comprises a front crossmember (1), a rear crossmember (2) and two frame rails (3), the front crossmember (1) and the rear crossmember (2) being spaced apart in a longitudinal direction of the vehicle and both connected between the two frame rails (3) to jointly define an electric drive receiving space, and at least part of each frame rail (3) being configured as an arched structure that is arched upwards to form a clearance space (51) below the arched structure. The electric drive assembly (101) is mounted at the electric drive receiving space, and is in power connection with a drive shaft (102), and the drive shaft (102) extends through the clearance space (51) to the outside of the electric drive receiving space. This structure can improve strength, achieve high integration, and save on space. A vehicle is also provided.

Description

Rear subframe assembly and vehicle

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese patent application No. 202510358447.4, filed on March 25, 2025, entitled "Rear Subframe Assembly and Vehicle";

[0003] It also claims priority to the Chinese patent application filed on March 25, 2025, with application number "202510358464.8" and title "Rear Subframe Assembly and Vehicle".

[0004] It also claims priority to the Chinese patent application filed on March 25, 2025, with application number "202520534023.4" and title "Rear Subframe and Vehicle";

[0005] It also claims priority to the Chinese patent application filed on March 25, 2025, with application number "202520537625.5" and title "Rear Subframe and Vehicle";

[0006] It also claims priority to the Chinese patent application filed on March 25, 2025, with application number "202520534011.1" and title "Rear Subframe and Vehicle";

[0007] It also claims priority to the Chinese patent application filed on March 25, 2025, with application number "202520535860.9" and title "Rear Subframe and Vehicle";

[0008] It also claims priority to the Chinese patent application filed on March 25, 2025, with application number "202520537367.0" and title "Rear Subframe and Vehicle";

[0009] It also claims priority to the Chinese patent application filed on March 25, 2025, with application number "202520535869.X" and title "Rear Subframe and Vehicle". Technical Field

[0010] This application relates to the field of vehicle manufacturing technology, and in particular to a rear subframe assembly and a vehicle. Background Technology

[0011] With the development of the national economy and the continuous improvement of living standards, vehicles are becoming increasingly important in daily life and travel. Vehicle range and safety performance are key considerations during vehicle manufacturing. Most existing vehicles have a rear subframe assembly at the bottom, which includes a subframe. This subframe provides mounting points for structures such as the drive motor. However, existing subframes have low structural strength and poor durability, leading to lower vehicle safety. Furthermore, the subframe occupies a large amount of space, resulting in poor vehicle weight reduction, affecting range, and consequently impacting the user experience. Therefore, there is room for improvement. Summary of the Invention

[0012] According to an embodiment of this application, a rear subframe assembly includes: a subframe, the subframe including a front crossbeam, a rear crossbeam and two frame longitudinal beams, the front crossbeam and the rear crossbeam being spaced apart along the longitudinal direction of the vehicle, and at least a portion of each frame longitudinal beam being constructed as an arched structure, the arched structure arching upwards to form a clearance space below the arched structure, the clearance space being used to clear the drive shaft of an electric drive assembly.

[0013] According to the embodiments of this application, in the rear subframe assembly, at least a portion of each frame longitudinal beam is constructed as an arched structure, which can improve the structural strength and durability of the subframe. A clearance space is formed below the arched structure, which is used to clear the drive shaft of the electric drive assembly, thereby reducing the overall space occupied by the rear subframe assembly and improving the overall integration of the rear subframe assembly.

[0014] In some embodiments, the rear crossbeam forms a steering gear clearance hole for clearance of a steering gear; it also includes an electric drive assembly, wherein the front and rear crossbeams are spaced apart along the longitudinal direction of the vehicle and are respectively connected between two of the frame longitudinal beams to jointly define an electric drive housing space, the electric drive assembly is mounted in the electric drive housing space, and the electric drive assembly is poweredly connected to a drive shaft, the drive shaft extending from the clearance space to outside the electric drive housing space.

[0015] In some embodiments, the steering clearance hole extends through the rear crossbeam in the longitudinal direction, and at least a portion of the steering gear is disposed within the steering clearance hole.

[0016] In some embodiments, the rear crossbeam is provided with a plurality of steering gear mounting points for mounting the steering gear, and the plurality of steering gear mounting points are spaced apart around the steering gear clearance hole;

[0017] And / or, the distance between the outer wall of the portion of the steering gear placed in the steering gear clearance hole and the inner wall of the steering gear clearance hole is set as A, and satisfies: 4mm≤A≤6mm.

[0018] In some embodiments, at least a portion of the steering gear is located on the rear side of the rear crossbeam, the rear sidewall of the rear crossbeam is formed with a clearance groove, the clearance groove communicating laterally with the steering gear clearance hole along the vehicle, the steering gear is provided with a steering gear fork, and the clearance groove is used to avoid the steering gear fork.

[0019] In some embodiments, there are two clearance slots, which are connected to both sides of the steering gear clearance hole along the lateral direction of the vehicle. Both clearance slots are constructed as arc-shaped slots, and the radii of the two clearance slots are set as R1 and R2 respectively, satisfying: 30mm≤R1≤40mm, 40mm≤R2≤50mm.

[0020] In some embodiments, the width of the steering gear clearance hole is set to D1, and satisfies: 270mm≤D1≤280mm;

[0021] And / or, the maximum distance between the upper and lower walls of the steering gear clearance hole is set to D2, and satisfies: 140mm≤D2≤150mm;

[0022] And / or, the minimum distance between the upper and lower walls of the steering gear clearance hole is set to D3, and satisfies: 110mm≤D3≤130mm.

[0023] In some embodiments, the thickness of the rear crossbeam along the longitudinal direction of the vehicle is set to D4, and satisfies: 60mm≤D4≤80mm;

[0024] And / or, the maximum height of the rear crossbeam is set to D5, and satisfies: 220mm≤D5≤240mm.

[0025] In some embodiments, one end of the rear crossbeam is further provided with a clearance notch, which is adapted to pass through in the front-rear direction and is used to avoid the exhaust pipe of the engine.

[0026] In some embodiments, the clearance opening is configured to open downwards, and the distance between the upper wall of the clearance opening and the upper wall of the rear crossbeam is set to D6, satisfying: 160mm≤D6≤180mm;

[0027] And / or, the rear crossbeam is integrally formed.

[0028] In some embodiments, the electric drive assembly is powered by two drive shafts, both of which extend laterally along the vehicle and are respectively disposed in the clearance spaces of the two frame longitudinal beams.

[0029] In some embodiments, the front crossbeam is provided with a front electric drive mounting point, each of the frame longitudinal beams is provided with a rear electric drive mounting point, the arched structure is located between the rear electric drive mounting point and the front crossbeam, and the front electric drive mounting point and the rear electric drive mounting points of the two frame longitudinal beams are all used to mount the electric drive assembly.

[0030] In some embodiments, the rear electric drive mount points of the two frame longitudinal beams are directly opposite each other along the vehicle's transverse direction, and the front electric drive mount points and the rear electric drive mount points of the two frame longitudinal beams are distributed in an isosceles triangle.

[0031] In some embodiments, the distance between the rear electric drive mounting point and the rear crossbeam is less than the distance between the rear electric drive mounting point and the front crossbeam.

[0032] In some embodiments, the distance between the top of the drive shaft and the inner top wall of the clearance space is L1, and satisfies: 10mm≤L1≤15mm.

[0033] In some embodiments, the front end of the longitudinal beam of the frame is provided with a front body mounting part, and the rear end of the longitudinal beam of the frame is provided with a rear body mounting part; the distance between the center of the drive shaft and the front body mounting part is L2, and satisfies: 310mm≤L2≤330mm, and the distance between the center of the drive shaft and the rear body mounting part is L3, and satisfies: 460mm≤L3≤480mm.

[0034] In some embodiments, the arched structure is located between the front body mounting portion and the middle portion of the frame longitudinal beam, and the bottom surface of both the front body mounting portion and the bottom surface of the middle portion of the frame longitudinal beam are lower than the bottom surface of the rear end of the rear body mounting portion.

[0035] In some embodiments, the height difference L4 between the front vehicle mounting portion and the rear vehicle mounting portion satisfies: 100mm≤L4≤120mm;

[0036] And / or, the distance between the front vehicle mounting part and the rear vehicle mounting part is d1, and satisfies: 780mm≤d1≤800mm.

[0037] In some embodiments, the inner wall surface of the clearance space includes a front wall surface and a rear wall surface, the front wall surface and the rear wall surface being connected to the inner vertex of the clearance space;

[0038] Wherein, the extension length of the front wall surface is greater than the extension length of the rear wall surface.

[0039] In some embodiments, the electric drive housing includes a front housing and a rear housing, the front housing is connected to the front side of the rear housing, the front housing is formed between the front sections of the longitudinal beams of the two frame longitudinal beams, the rear housing is formed between the rear sections of the longitudinal beams of the two frame longitudinal beams, the electric drive assembly includes a reducer and a drive motor, the front housing is used to accommodate the reducer and the drive shaft, the clearance space is connected to the front housing, and the rear housing is used to accommodate the drive motor.

[0040] In some embodiments, the frame longitudinal beam includes an inner plate portion and an outer plate portion, both of which are constructed in a groove shape. The inner plate portion and the outer plate portion are fastened together, and a portion of the inner plate portion and a portion of the outer plate portion together form the arched structure.

[0041] In some embodiments, the height difference between the highest point of the clearance space and the lowest point of the front end of the frame longitudinal beam is L6, and satisfies: 125mm≤L6≤145mm; and / or, the height of the arch structure along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm.

[0042] In some embodiments, the device includes: an electric drive assembly mounted in the electric drive housing space, the electric drive assembly being poweredly connected to a drive shaft, the drive shaft extending from the clearance space to outside the electric drive housing space.

[0043] In some embodiments, both the front wall surface and the rear wall surface are constructed as curved surfaces, and the radius of curvature of the front wall surface is greater than the radius of curvature of the rear wall surface.

[0044] In some embodiments, the distance between the top tangent of the drive shaft connecting the front wall and the rear wall is L5, and satisfies: 130mm≤L5≤150mm.

[0045] In some embodiments, the frame longitudinal beam has a front upper arm mounting portion at the upper front end of the arched structure and a front lower arm mounting portion at the lower front end, the front lower arm mounting portion being located in front of the front upper arm mounting portion; the frame longitudinal beam has a rear upper arm mounting portion at the upper rear end and a rear lower arm mounting portion at the lower rear end, the rear lower arm mounting portion being located in front of the rear upper arm mounting portion.

[0046] In some embodiments, a rear lower arm mounting bracket is also included, the rear lower arm mounting bracket being located at the bottom of the vehicle frame longitudinal beam, the rear lower arm mounting bracket including front and rear plates and a reinforcing plate located between the two plates, the rear lower arm mounting portion being disposed on the two plates.

[0047] In some embodiments, the lower rear end of the longitudinal beam of the vehicle frame is further provided with a rear suspension toe bar mounting part, the rear suspension toe bar mounting part is located on the rear side of the rear lower arm mounting part, the rear suspension toe bar mounting part is used to install one end of the rear suspension toe bar, and the other end of the rear suspension toe bar is adapted to be connected to the steering knuckle.

[0048] In some embodiments, the rear crossbeam is further provided with a toe-in adjustment clearance hole that extends in the front-rear direction, the toe-in adjustment clearance hole being used to avoid the adjustment tool for adjusting the rear suspension toe-in rod.

[0049] In some embodiments, the cross-sectional height of the frame longitudinal beam at the arched structure is less than the cross-sectional height at the rear side of the arched structure.

[0050] In some embodiments, the rear crossbeam is integrally formed.

[0051] In some embodiments, a steering gear mounting portion is provided on the rear side of the rear crossbeam, and the rear crossbeam forms a rearwardly open steering gear clearance hole. The steering gear mounting portion is used to mount a steering gear, and the steering gear clearance hole is used to clear at least a portion of the steering gear.

[0052] In some embodiments, at least a portion of the steering gear is located on the rear side of the rear crossbeam, the rear sidewall of the rear crossbeam is formed with a clearance groove, the clearance groove communicating laterally with the steering gear clearance hole along the vehicle, the steering gear is provided with a steering gear fork, and the clearance groove is used to avoid the steering gear fork.

[0053] In some embodiments, the steering gear mounting portions are provided in a plurality, with at least some of the steering gear mounting portions spaced apart on both sides of the height direction of the two clearance slots, and at least some of the steering gear mounting portions spaced apart on both sides of the lateral direction of the steering gear clearance hole.

[0054] In some embodiments, the rear crossbeam is integrally formed.

[0055] In some embodiments, the system further includes a rear lower arm mounting bracket, which is connected to the bottom of the longitudinal beam of the vehicle frame and the bottom of the rear crossbeam, respectively, and a hollow reinforcing cavity is formed within the rear lower arm mounting bracket.

[0056] In some embodiments, the rear lower arm mounting bracket is configured to extend outward from rear to front, and at least a portion of the rear lower arm mounting bracket is located at the bottom of the electric drive housing.

[0057] In some embodiments, the hollow reinforcing cavity is configured to extend obliquely from rear to front, with the rear end of the hollow reinforcing cavity opening toward the rear crossbeam and the front end of the hollow reinforcing cavity opening toward the frame longitudinal beam.

[0058] In some embodiments, there are two rear lower arm mounting brackets, and the two rear lower arm mounting brackets are symmetrically distributed at the bottom of both ends of the rear crossbeam.

[0059] In some embodiments, the system further includes a front upper arm mounting bracket and / or a front lower arm mounting bracket, wherein the front upper arm mounting bracket is mounted on the upper side of the end of the front crossbeam, and the front lower arm mounting bracket is mounted on the lower side of the end of the front crossbeam, and the front upper arm mounting bracket and / or the front lower arm mounting bracket are connected to the front end of the frame longitudinal beam.

[0060] In some embodiments, a rear upper arm mounting bracket is also included, which is mounted on the upper side of the end of the rear crossbeam.

[0061] In some embodiments, the front crossbeam is a one-piece molded beam;

[0062] And / or, the rear crossbeam is a one-piece molded beam;

[0063] And / or, at least a portion of the rear crossbeam is configured to gradually decrease in thickness toward the ends in the vertical direction of the vehicle.

[0064] In some embodiments, each of the frame longitudinal beams is formed with a clearance through hole that runs laterally through the vehicle, the clearance through hole communicating with the electric drive housing space, and the clearance through hole being used to pass through the drive shaft of the electric drive assembly.

[0065] In some embodiments, the front crossbeam and at least one of the two frame longitudinal beams are provided with an electric drive suspension mounting point.

[0066] In some embodiments, at least a portion of the frame longitudinal beam is configured as a through-beam structure, the through-beam structure including an upper arch and a lower arch, the upper arch being located above the lower arch, and the clearance perforation being formed between the upper arch and the lower arch.

[0067] In some embodiments, the height of the frame longitudinal beam in the vertical direction of the vehicle is set to gradually decrease from the front of the through structure and from the rear of the through structure.

[0068] In some embodiments, the top of the upper arch is higher than the top surface of the frame crossbeam;

[0069] And / or, the bottom of the lower arch is lower than the bottom surface of the frame crossbeam.

[0070] In some embodiments, the clearance holes of the two frame longitudinal beams are distributed opposite each other in the transverse direction of the vehicle and are symmetrically connected to both sides of the electric drive housing space.

[0071] In some embodiments, there are two frame crossbeams, namely a front crossbeam and a rear crossbeam, the front crossbeam and the rear crossbeam are spaced apart in the front-rear direction, and the two frame longitudinal beams are spaced apart and connected between the front crossbeam and the rear crossbeam to jointly define the electric drive housing space.

[0072] In some embodiments, the distance between the clearance perforation and the front crossbeam is smaller than the distance between the clearance perforation and the rear crossbeam.

[0073] In some embodiments, the upper end of the front crossbeam is provided with a front upper arm mounting bracket and the lower end of the front crossbeam is provided with a front lower arm mounting bracket, and the front upper arm mounting bracket and / or the front lower arm mounting bracket are connected to the front end of the vehicle frame longitudinal beam.

[0074] And / or, the upper end of the rear crossbeam is provided with a rear upper arm mounting bracket and the lower end is provided with a rear lower arm mounting bracket, and the rear upper arm mounting bracket and / or the rear lower arm mounting bracket are connected to the rear end of the vehicle frame longitudinal beam.

[0075] In some embodiments, the front sections of the two frame longitudinal beams are symmetrically distributed, and the clearance spaces of the two frame longitudinal beams are symmetrically connected to both sides of the front receiving space.

[0076] In some embodiments, the front section of the longitudinal beam further includes a front end structure, the rear end of the arched structure is connected to the front end of the rear section of the longitudinal beam, the front end structure is connected to the front end of the arched structure, and the front end structure is configured to be inclined forward and downward relative to the arched structure.

[0077] In some embodiments, the front end structure is configured to be lower than the rear section of the longitudinal beam, and the height difference L8 between the front end of the front end structure and the rear section of the longitudinal beam satisfies: 100mm≤L8≤120mm.

[0078] In some embodiments, there are two frame crossbeams, namely a front crossbeam and a rear crossbeam. The front crossbeam is connected between the front end structures of the two frame longitudinal beams, and the rear crossbeam is connected between the rear sections of the two frame longitudinal beams.

[0079] In some embodiments, the front crossbeam is provided with a front electric drive mounting point, and each of the frame longitudinal beams is provided with a rear electric drive mounting point at the connection between the arch structure and the rear section of the longitudinal beam. The front electric drive mounting point and the two rear electric drive mounting points are distributed in an isosceles triangle.

[0080] In some embodiments, the distance from the center of the clearance space to the front end of the longitudinal beam is L10, and satisfies: 300mm≤L10≤350mm;

[0081] And / or, the distance from the center of the clearance space to the rear end of the longitudinal beam is L101, and satisfies: 450mm≤L101≤490mm.

[0082] In some embodiments, the arched structure is configured such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, and the front end of the frame longitudinal beam is lower than the rear end of the frame longitudinal beam.

[0083] In some embodiments, the arched structure is located between the front end and the middle of the frame longitudinal beam, and the bottom surface of the front end and the bottom surface of the middle of the frame longitudinal beam are both lower than the bottom surface of the rear end of the frame longitudinal beam.

[0084] In some embodiments, the height difference L4 between the front end and the rear end of the frame longitudinal beam satisfies: 100mm≤L4≤120mm.

[0085] And / or, the distance between the front end of the frame longitudinal beam and the rear end of the frame longitudinal beam is d1, and satisfies: 780mm≤d1≤800mm.

[0086] In some embodiments, the front end of the frame longitudinal beam is provided with a front body mounting part, and the rear end of the frame longitudinal beam is provided with a rear body mounting part. The front body mounting part is lower than the rear body mounting part and both are used to connect to the vehicle body.

[0087] This application also discloses a vehicle, including an electric drive assembly and the aforementioned rear subframe assembly. The electric drive assembly is connected to the longitudinal beams of the frame and at least one of the cross beams of the frame via a motor mount. The drive shaft of the electric drive assembly passes through the clearance space. Attached Figure Description

[0088] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0089] Figure 1 is a schematic diagram of the subframe according to an embodiment of this application;

[0090] Figure 2 is a structural schematic diagram of the subframe according to an embodiment of this application;

[0091] Figure 3 is a partial cross-sectional view of the subframe according to an embodiment of this application;

[0092] Figure 4 is a partial cross-sectional view of the subframe according to an embodiment of this application;

[0093] Figure 5 is a structural schematic diagram of the subframe according to an embodiment of this application;

[0094] Figure 6 is a structural schematic diagram of the subframe according to an embodiment of this application;

[0095] Figure 7 is a schematic diagram of the dimensions of the arched structure of the subframe according to an embodiment of this application;

[0096] Figure 8 is a structural schematic diagram of the rear subframe assembly according to an embodiment of this application;

[0097] Figure 9 is a top view of the rear subframe assembly without a steering gear according to an embodiment of this application;

[0098] Figure 10 is a schematic diagram of the subframe structure in Figure 9 of this application embodiment;

[0099] Figure 11 is a second structural schematic diagram of the subframe in Figure 9 of this application embodiment;

[0100] Figure 12 is a schematic diagram of the arched structure according to an embodiment of this application;

[0101] Figure 13 is a second structural schematic diagram of the arched structure according to an embodiment of this application;

[0102] Figure 14 is a rear view of the rear crossbeam of the rear subframe according to an embodiment of this application;

[0103] Figure 15 is a schematic diagram of another rear subframe according to an embodiment of this application;

[0104] Figure 16 is a top view of the rear subframe according to an embodiment of Figure 15 of this application;

[0105] Figure 17 is a partial schematic diagram of the bottom of the rear subframe according to an embodiment of this application;

[0106] Figure 18 is a rear view of the rear subframe according to an embodiment of this application.

[0107] Figure 19 is a second structural schematic diagram of the rear subframe according to an embodiment of Figure 15 of this application;

[0108] Figure 20 is a structural schematic diagram of the rear subframe according to an embodiment of the present application, showing the front and rear sections of the longitudinal beams;

[0109] Figure 21 is a schematic diagram showing the dimensions of the rear subframe in Figure 20 according to an embodiment of this application;

[0110] Figure 22 is a structural schematic diagram from another perspective in Figure 20 according to an embodiment of this application;

[0111] Figure 23 is a structural schematic diagram of the rear subframe in Figure 20 according to an embodiment of this application from another perspective;

[0112] Figure 24 is a top view of the rear subframe according to an embodiment of the present application, showing the front and rear sections of the longitudinal beams;

[0113] Figure 25 is a structural schematic diagram of the electric drive assembly and rear subframe in Figure 20 according to an embodiment of this application;

[0114] Figure 26 is a structural schematic diagram of the rear subframe according to an embodiment of this application;

[0115] Figure 27 is a left view of the rear subframe according to an embodiment of this application;

[0116] Figure 28 is a top view of the rear subframe according to an embodiment of this application;

[0117] Figure 29 is a structural schematic diagram of the rear subframe from different perspectives according to an embodiment of this application;

[0118] Figure 30 is a left view of the rear subframe according to an embodiment of the present application, which has different features compared to those marked in Figure 27;

[0119] Figure 31 is a top view of the rear subframe according to an embodiment of the present application, which does not distinguish the markings related to the front and rear electric drive mount mounting points compared to Figure 28.

[0120] Reference numerals: Rear subframe assembly 1000, Subframe 100, Electric drive assembly 101, Drive motor 1001, Reducer 1002, Drive shaft 102, Steering gear 103, Steering gear fork 1031, Electric drive mount point 104, Body mounting part 105, Sleeve 1051, Frame crossbeam 106, Control arm mounting bracket 107, Front crossbeam 1, Front electric drive mount point 11, Rear crossbeam 2, Steering gear clearance hole 20, Toe-in adjustment clearance hole 21, Clearance notch 22, Steering gear mounting point 23, Clearance groove 24, Steering gear mounting part 25. Frame longitudinal beam 3, front section of longitudinal beam 30, front end structure 301, inner panel 31, outer panel 32, rear electric drive suspension mounting point 33, front body mounting part 34, rear body mounting part 35, clearance perforation 36, through structure 37, upper arch 371, lower arch 372, rear section of longitudinal beam 38, front upper arm mounting bracket 40, front upper arm mounting part 401, front lower arm mounting bracket 411, front lower arm mounting part 411, rear upper arm mounting bracket 42, rear upper arm mounting part 421, rear lower arm mounting bracket 43, plate 431, reinforcing plate 432, rear lower arm mounting part 433, front toe rod mounting bracket 434, arch structure 5, inner wall surface 50, clearance space 51, front wall surface 52, rear wall surface 53, electric drive housing space 6, front housing space 61, hollow reinforcing cavity 611, rear housing space 62. Detailed Implementation

[0121] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0122] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0123] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0124] The rear subframe assembly 1000 according to an embodiment of this application is described below with reference to Figures 1-8. It has a high degree of integration, which can improve the overall vehicle weight reduction, thereby ensuring the vehicle's range performance, improving the user experience, and improving the structural strength and durability of the subframe 100, ensuring safety in use.

[0125] As shown in Figures 1-8, a rear subframe assembly 1000 according to one embodiment of this application includes: a subframe 100 and an electric drive assembly 101.

[0126] The subframe 100 includes a front crossbeam 1, a rear crossbeam 2, and two frame longitudinal beams 3. The front crossbeam 1 and the rear crossbeam 2 are spaced apart along the longitudinal direction of the vehicle and are respectively connected between the two frame longitudinal beams 3 to jointly define the electric drive housing space 6. At least part of each frame longitudinal beam 3 is constructed as an arch structure 5, which arches upward to form a clearance space 51 below the arch structure 5. The rear crossbeam 2 forms a steering gear clearance hole 20 for clearance of the steering gear 103. The electric drive assembly 101 is mounted in the electric drive housing space 6 and is powered by a drive shaft 102. The drive shaft 102 passes through the clearance space 51 to the outside of the electric drive housing space 6.

[0127] Specifically, the rear subframe assembly 1000 is equipped with a subframe 100, which is the skeleton of the front and rear axles. That is, the subframe 100 is a component of the front and rear axles. The subframe 100 is an intermediate component connecting the suspension system and the vehicle body. The axles, suspension system, etc. can be connected to the main frame through the subframe 100. The subframe 100 can block vibration and noise, reduce their direct entry into the passenger compartment, thereby improving vehicle comfort and handling. At the same time, it can improve the versatility of the suspension, reduce research and development and assembly costs, and provide a basis for the effect of large-scale production.

[0128] The subframe 100 is equipped with a front crossbeam 1, a rear crossbeam 2, and two frame longitudinal beams 3. Both the front crossbeam 1 and the rear crossbeam 2 extend laterally along the vehicle and are spaced apart longitudinally. The front crossbeam 1 is located in front of the rear crossbeam 2. Both frame longitudinal beams 3 extend longitudinally along the vehicle and are spaced apart laterally. The two ends of the front crossbeam 1 are connected to the two frame longitudinal beams 3 by welding or other means. The rear crossbeam 2... Both ends are also connected to the two frame longitudinal beams 3 by welding or other means, so that the front crossbeam 1, the rear crossbeam 2 and the two frame longitudinal beams 3 can jointly define the electric drive housing space 6. The rear subframe assembly 1000 is also provided with an electric drive assembly 101, which can provide running power to the wheels. The electric drive assembly 101 can be installed in the electric drive housing space 6 to improve the integration of the rear subframe assembly 1000 and make full use of the space at the subframe 100.

[0129] Furthermore, at least a portion of each frame longitudinal beam 3 is constructed as an arch structure 5. This means that either a portion of each frame longitudinal beam 3 is constructed as an arch structure 5, or the entire frame longitudinal beam 3 is constructed as an arch structure 5. In this embodiment, a portion of each frame longitudinal beam 3 is constructed as an arch structure 5, and the arch structures 5 of the two frame longitudinal beams 3 are distributed opposite each other in the transverse direction of the vehicle to ensure that the performance of the left and right sides of the vehicle is the same. The arch structure 5 can arch upwards, so that when the force is transmitted to the frame longitudinal beam 3, the transmission direction can be changed, thereby weakening the effect of the force, ensuring the structural strength of each frame longitudinal beam 3, improving the durability of each frame longitudinal beam 3, and improving the safety of use.

[0130] In addition, the arched structure 5 arches upward, forming a clearance space 51 below the arched structure 5. The electric drive assembly 101 is poweredly connected to drive shafts 102 on both sides. The drive shafts 102 can be poweredly connected to the wheels, so that the electric drive assembly 101 can drive the wheels to rotate. The wheels are located on the outer side of the two frame longitudinal beams 3 along the transverse direction of the vehicle. The drive shafts 102 can pass through the clearance space 51 to the outside of the electric drive housing space 6, thereby enabling the electric drive assembly 101 to drive the wheels within the electric drive housing space 6, improving space utilization and ensuring the reliability of vehicle operation.

[0131] Furthermore, the rear subframe assembly 1000 is also equipped with a steering gear 103, which can control the wheels to adjust the vehicle's driving direction. The steering gear 103 can be installed on the rear crossbeam 2 of the vehicle, and the rear crossbeam 2 is provided with a steering gear clearance hole 20, which can be used to avoid the steering gear 103, thereby reducing the space occupied by the steering gear 103 and further improving the integration of the rear subframe assembly 1000. In addition, the steering gear clearance hole 20 on the rear crossbeam 2 can reduce the weight of the rear crossbeam 2, improve lightweighting, ensure the vehicle's range performance, and improve the user experience.

[0132] According to the embodiments of this application, the rear subframe assembly 1000, by providing an electric drive housing space 6, a clearance space 51, and a steering gear clearance hole 20, can reduce the overall space occupied by the rear subframe assembly 1000, thereby improving the overall integration of the rear subframe assembly 1000, which can improve the vehicle's lightweighting, ensure the vehicle's range performance, and improve the user experience. In addition, at least a portion of each frame longitudinal beam 3 is constructed as an arch structure 5, which can improve the structural strength and durability of the subframe 100, thereby ensuring the safety of the rear subframe assembly 1000 in use, resulting in better performance and a wider range of applications.

[0133] In some embodiments, the steering clearance hole 20 extends through the rear crossbeam 2 in the longitudinal direction, and at least a portion of the steering gear 103 is located within the steering clearance hole 20.

[0134] Specifically, the rear crossbeam 2 is provided with a steering gear clearance hole 20, which can be used to clear the steering gear 103. As shown in Figures 1-5, the steering gear clearance hole 20 is configured to pass through the rear crossbeam 2 in the front-rear direction, that is, the steering gear clearance hole 20 extends in the front-rear direction. The front end of the steering gear clearance hole 20 can communicate with the electric drive housing space 6, and the rear end of the steering gear clearance hole 20 can communicate with the rear space of the subframe 100. At least a part of the steering gear 103 is placed in the steering gear clearance hole 20. It is possible to place only a part of the steering gear 103 in the steering gear clearance hole 20, or to place the entire steering gear 103 in the steering gear clearance hole 20. In this embodiment, only a part of the steering gear 103 is placed in the steering gear clearance hole 20.

[0135] This allows the portion of the steering gear 103 along the vehicle's longitudinal direction to be placed within the steering gear clearance hole 20, thereby shortening the space occupied by the rear subframe assembly 1000 along the vehicle's longitudinal direction, thus improving the integration of the rear subframe assembly 1000. Furthermore, by providing the steering gear clearance hole 20 on the rear crossbeam 2, the mass of the rear crossbeam 2 can be reduced, thereby reducing the overall weight of the subframe 100, thus improving vehicle lightweighting, extending vehicle range, and enhancing the user experience.

[0136] In some embodiments, the rear crossbeam 2 is provided with a plurality of steering gear mounting points 23 for mounting the steering gear 103, and the plurality of steering gear mounting points 23 are distributed at intervals around the steering gear clearance hole 20.

[0137] Specifically, the steering gear 103 can be installed on the rear crossbeam 2, and at least a portion of the steering gear 103 can be placed in the steering gear clearance hole 20 of the rear crossbeam 2, as shown in Figure 1. The rear crossbeam 2 is also provided with a steering gear mounting point 23, which can be a threaded pipe. The steering gear 103 can be connected to the steering gear mounting point 23 by bolts, which is convenient for installation. The steering gear 103 is connected to the rear crossbeam 2 by bolts, which makes the steering gear 103 detachable relative to the rear crossbeam 2, thereby facilitating later maintenance and saving maintenance time.

[0138] In addition, multiple steering gear mounting points 23 are provided, that is, two, three or four steering gear mounting points 23 can be provided. In this embodiment, four steering gear mounting points 23 are provided. Multiple steering gear mounting points 23 are used to install the steering gear 103, which can improve the installation reliability of the steering gear 103. Moreover, multiple steering gear mounting points 23 are distributed at intervals around the steering gear clearance hole 20, so that when part of the steering gear 103 is placed in the steering gear clearance hole 20, multiple points on the outer peripheral wall of the steering gear 103 can be connected to the rear crossbeam 2. In this way, the force generated by the steering gear 103 can be transmitted to the rear crossbeam 2 through bolts located in different directions, so that the force can be distributed to multiple steering gear mounting points 23, thereby reducing the effect, extending the service life, and ensuring the reliability of use.

[0139] In other embodiments, the distance between the outer wall of the portion of the steering gear 103 located within the steering gear clearance hole 20 and the inner wall of the steering gear clearance hole 20 is set as A, and satisfies: 4mm≤A≤6mm.

[0140] Specifically, when the steering gear 103 is installed on the rear crossbeam 2, a portion of the steering gear 103 can be placed inside the steering gear clearance hole 20. As shown in Figure 4, there is a gap between the outer wall of the portion of the steering gear 103 placed inside the steering gear clearance hole 20 and the inner wall of the steering gear clearance hole 20. This gap can be set to A, and satisfies: 4mm≤A≤6mm. That is, the gap A between the outer wall of the portion of the steering gear 103 placed inside the steering gear clearance hole 20 and the inner wall of the steering gear clearance hole 20 can be set to 4mm, 4.5mm, 5mm, 5.5mm or 6mm, etc. Preferably, in this embodiment, the gap A between the outer wall of the portion of the steering gear 103 placed inside the steering gear clearance hole 20 and the inner wall of the steering gear clearance hole 20 is set to 5mm.

[0141] Thus, by setting the distance A between the outer wall of the portion of the steering gear 103 placed inside the steering gear clearance hole 20 and the inner wall of the steering gear clearance hole 20 to satisfy: 4mm≤A≤6mm, the steering gear clearance hole 20 can be set to avoid interference with the movement of the steering gear 103, thereby ensuring the operational reliability of the steering gear 103. It can also prevent the steering gear clearance hole 20 from being too large, which would affect the structural strength of the rear crossbeam 2, thus ensuring the reliability of the rear crossbeam 2 and its durability, and improving the safety of use.

[0142] In some embodiments, at least a portion of the steering gear 103 is located on the rear side of the rear crossbeam 2, and the rear sidewall of the rear crossbeam 2 is formed with a clearance groove 24. The clearance groove 24 communicates laterally with the steering gear clearance hole 20 along the vehicle. The steering gear 103 is provided with a steering gear fork 1031, and the clearance groove 24 is used to avoid the steering gear fork 1031.

[0143] Specifically, the steering gear 103 is mounted on the rear crossbeam 2, and as shown in Figures 4 and 8, at least a portion of the steering gear 103 is disposed on the rear side of the rear crossbeam 2. This means that only a portion of the steering gear 103 can be disposed on the rear side of the rear crossbeam 2, or the entire steering gear 103 can be disposed on the rear side of the rear crossbeam 2. In this embodiment, the rear part of the steering gear 103 is located on the rear side of the rear crossbeam 2, and the front part of the steering gear 103 can be placed in the steering gear clearance hole 20. This can shorten the overall size of the rear subframe assembly 1000 in the longitudinal direction of the vehicle, thereby improving integration and weight reduction.

[0144] Furthermore, a clearance groove 24 is formed on the rear sidewall of the rear crossbeam 2. The clearance groove 24 is recessed forward along the longitudinal direction of the vehicle and is open to the rear of the vehicle. The rear part of the steering gear 103 is located on the rear side of the rear crossbeam 2, that is, the clearance groove 24 is open to the steering gear 103. The steering gear 103 is provided with a steering fork 1031, which is located on one side of the steering gear 103. The clearance groove 24 is recessed forward along the longitudinal direction of the vehicle. The steering gear clearance hole 20 is connected laterally, and the clearance groove 24 is used to avoid the steering gear fork 1031. That is, the front part of the steering gear fork 1031 can be placed in the clearance groove 24, and the front part of the steering gear 103 can be placed in the steering gear clearance hole 20. This can avoid the steering gear clearance hole 20 from interfering with the movement of the steering gear 103, and can also avoid the rear side wall of the rear crossbeam 2 from interfering with the movement of the steering gear fork 1031, so as to ensure the operational reliability of the steering gear 103.

[0145] In some embodiments, there are two clearance slots 24, which are connected to both sides of the steering gear clearance hole 20 along the lateral direction of the vehicle. Both clearance slots 24 are constructed as arc-shaped slots, and the radii of the two clearance slots 24 are set as R1 and R2 respectively, and satisfy: 30mm≤R1≤40mm, 40mm≤R2≤50mm.

[0146] Specifically, the steering gear 103 is provided with two steering gear forks 1031. The two steering gear forks 1031 are symmetrically connected to both sides of the steering gear 103 and extend laterally to both sides of the steering gear 103. The steering gear forks 1031 can be connected to the ball joints and tie rods of the vehicle to transmit steering torque to the wheel hubs, causing the wheels to deflect. The two steering gear forks 1031 can be connected to the wheel hubs on both sides of the vehicle to control the deflection of the two wheels simultaneously, ensuring reliable operation.

[0147] Furthermore, as shown in Figures 1 and 3, two clearance slots 24 are provided. The two clearance slots 24 are respectively connected to both sides of the steering gear clearance hole 20 along the lateral direction of the vehicle, so that at least part of the front part of the two steering gear forks 1031 can be placed in the corresponding clearance slots 24, thereby shortening the overall size of the rear subframe assembly 1000 in the longitudinal direction and improving weight reduction. The steering gear fork 1031 is set as a cylindrical structure, so that the clearance slot 24 can be correspondingly constructed as an arc-shaped slot to ensure the reliability of clearance for the steering gear fork 1031.

[0148] In addition, the radii of the two clearance slots 24 are set as R1 and R2 respectively. In this embodiment, as shown in Figure 3, R1 is the radius of the clearance slot 24 on the left and R2 is the radius of the clearance slot 24 on the right, and satisfies: 30mm≤R1≤40mm, 40mm≤R2≤50mm. That is, the radius R1 of the clearance slot 24 on the left can be set to 30mm, 32.5mm, 35mm, 37.5mm or 40mm, etc., and the radius R2 of the clearance slot 24 on the right can be set to 40mm, 42.5mm, 45mm, 47.5mm or 50mm, etc. Preferably, in this embodiment, the radius R1 of the clearance slot 24 on the left is set to 34.3mm and the radius R2 of the clearance slot 24 on the right is set to 47.062mm. In this way, the rear sidewall of the rear crossbeam 2 can be prevented from interfering with the movement of the steering fork 1031, so as to ensure the reliability of the steering gear 103 operation.

[0149] In some embodiments, the width of the steering gear clearance hole 20 is set to D1, and satisfies: 270mm≤D1≤280mm.

[0150] Specifically, the rear crossbeam 2 is provided with a steering gear clearance hole 20. A portion of the steering gear 103 can be placed within the steering gear clearance hole 20. As shown in Figure 3, the width of the steering gear clearance hole 20 can be set to D1, satisfying: 270mm ≤ D1 ≤ 280mm. That is, the width D1 of the steering gear clearance hole 20 can be set to 270mm, 272.5mm, 275mm, 277.5mm, or 280mm, etc. Preferably, in this embodiment, the width D1 of the steering gear clearance hole 20 can be set to 275.5mm. The width D1 of the steering gear clearance hole 20 is set to satisfy: 270mm≤D1≤280mm. This ensures that there is a gap between the steering gear 103 and the inner wall of the steering gear clearance hole 20 in the width direction, thereby avoiding interference of the steering gear clearance hole 20 with the lateral movement of the steering gear 103, ensuring the operational reliability of the steering gear 103. It also prevents the width of the steering gear clearance hole 20 from being too large, which would affect the structural strength of the rear crossbeam 2, ensuring the reliability and durability of the rear crossbeam 2 and improving the safety of use.

[0151] In other embodiments, the maximum distance between the upper and lower walls of the steering gear clearance hole 20 is set to D2, and satisfies: 140mm≤D2≤150mm.

[0152] Specifically, as shown in Figures 1-3, the steering gear clearance hole 20 is provided on the rear crossbeam 2 and extends through the rear crossbeam 2 along the front-rear direction of the vehicle. The steering gear clearance hole 20 can be configured as an irregularly shaped hole to allow clearance for various parts of the steering gear 103. The maximum distance between the upper and lower walls of the steering gear clearance hole 20 is set to D2, and the maximum distance D2 between the upper and lower walls of the steering gear clearance hole 20 is set to satisfy: 140mm≤D2≤150mm, that is, the maximum distance D2 between the upper and lower walls of the steering gear clearance hole 20 can be set to 140mm, 142.5mm, 145mm, 147.5mm or 150mm, etc. Preferably, in this embodiment, the maximum distance D2 between the upper and lower walls of the steering gear clearance hole 20 can be set to 145.5mm.

[0153] In other embodiments, the minimum distance between the upper and lower walls of the steering gear clearance hole 20 is set to D3, and satisfies: 110mm≤D3≤130mm.

[0154] Specifically, the minimum distance between the upper and lower walls of the steering gear clearance hole 20 is set to D3, and the minimum distance D3 between the upper and lower walls of the steering gear clearance hole 20 is set to satisfy: 110mm≤D3≤130mm, that is, the minimum distance D3 between the upper and lower walls of the steering gear clearance hole 20 can be set to 110mm, 112.5mm, 115mm, 117.5mm, 120mm, 122.5mm, 125mm, 127.5mm, 130mm, etc. Preferably, in this embodiment, the minimum distance D3 between the upper and lower walls of the steering gear clearance hole 20 can be set to 117.122mm.

[0155] Thus, the maximum distance D2 between the upper and lower walls of the steering gear clearance hole 20 is set to satisfy: 140mm≤D2≤150mm, and the minimum distance D3 between the upper and lower walls of the steering gear clearance hole 20 is set to satisfy: 110mm≤D3≤130mm. This ensures that there is a gap between the upper wall of the steering gear clearance hole 20 and the upper wall of the steering gear 103, and a gap between the lower wall of the steering gear clearance hole 20 and the lower wall of the steering gear 103. This avoids interference of the steering gear clearance hole 20 with the vertical movement of the steering gear 103, thus ensuring the operational reliability of the steering gear 103. It also prevents the height of the steering gear clearance hole 20 from being too large, which would affect the structural strength of the rear crossbeam 2, ensuring the reliability and durability of the rear crossbeam 2 and improving operational safety.

[0156] In some embodiments, the thickness of the rear crossbeam 2 along the front-rear direction of the vehicle is set to D4, and satisfies: 60mm≤D4≤80mm.

[0157] Specifically, the rear crossbeam 2 is located on the rear side of the subframe 100, and its two ends are connected to the two longitudinal beams 3 of the frame respectively. The rear crossbeam 2 is provided with a steering gear clearance hole 20, as shown in Figure 2. The thickness of the rear crossbeam 2 along the front-rear direction of the vehicle is set to D4, and satisfies: 60mm≤D4≤80mm. That is, the thickness D4 of the rear crossbeam 2 along the front-rear direction of the vehicle can be set to 60mm, 63mm, 66mm, 69mm, 72mm, 75mm, 78mm or 80mm, etc. Preferably, in this embodiment, the thickness D4 of the rear crossbeam 2 along the front-rear direction of the vehicle can be set to 69mm, that is, the hole depth of the steering gear clearance hole 20 can be set to be greater than or equal to 60mm and less than or equal to 80mm.

[0158] This ensures the structural strength of the rear crossbeam 2, improves the durability of the rear side of the subframe 100, and increases the space within the steering gear clearance hole 20 to increase the volume of the steering gear 103. This, in turn, improves the integration of the rear subframe assembly 1000, enhances the overall vehicle weight reduction, and ultimately improves the vehicle's range performance.

[0159] In other embodiments, the maximum height of the rear crossbeam 2 is set to D5, and satisfies: 220mm≤D5≤240mm.

[0160] Specifically, the rear crossbeam 2 is located on the rear side of the subframe 100, and both ends of the rear crossbeam 2 are connected to two longitudinal beams 3 of the frame respectively. The rear crossbeam 2 is provided with a steering gear clearance hole 20, as shown in Figure 2. The maximum height of the rear crossbeam 2 is set to D5, and satisfies: 220mm≤D5≤240mm, that is, the maximum height D5 of the rear crossbeam 2 can be set to 220mm, 223mm, 226mm, 229mm, 232mm, 235mm, 238mm or 240mm, etc. Preferably, in this embodiment, the maximum height D5 of the rear crossbeam 2 can be set to 233.5mm. In this way, when the rear crossbeam 2 is provided with a steering gear clearance hole 20, the structural strength of the rear crossbeam 2 can be guaranteed, and the durability of the rear side of the subframe 100 can be improved.

[0161] In addition, the minimum height of the rear crossbeam 2 is located at the end of the rear crossbeam 2, that is, at the connection between the rear crossbeam 2 and the frame longitudinal beam 3. In this embodiment, the minimum height of the rear crossbeam 2 is set to 78.366mm, which can ensure the reliability of the connection between the rear crossbeam 2 and the frame longitudinal beam 3, so as to ensure the safety of use.

[0162] In some embodiments, one end of the rear crossbeam 2 is also provided with a clearance notch 22, which is adapted to pass through in the front-rear direction and is used to avoid the exhaust pipe of the engine.

[0163] Specifically, as shown in Figures 1 and 3, the clearance opening 22 is located at one end of the rear crossbeam 2, that is, the clearance opening 22 is located near the longitudinal beam 3 of the frame, and the clearance opening 22 is suitable for passing through in the front-rear direction. The exhaust pipe of the engine is extended in the front-rear direction of the vehicle, so that the clearance opening 22 can avoid the exhaust pipe of the engine and ensure the reliability of vehicle operation.

[0164] Furthermore, the clearance notch 22 is staggered from the steering gear clearance hole 20 in the vertical direction, which can ensure the structural strength of the rear crossbeam 2 in the vertical direction. It can also separate the engine exhaust pipe from the steering gear 103. The exhaust gas discharged by the engine is high-temperature gas. Separating the engine exhaust pipe from the steering gear 103 can ensure the operational reliability of the steering gear 103 and extend the service life of the steering gear 103.

[0165] In some embodiments, the clearance notch 22 is provided to open downwards, and the distance between the upper wall of the clearance notch 22 and the upper wall of the rear crossbeam 2 is set to D6, satisfying: 160mm≤D6≤180mm.

[0166] Specifically, the clearance notch 22 is provided on the lower wall of one end of the rear crossbeam 2, and the clearance notch 22 is recessed upward on the lower wall of the rear crossbeam 2 and opened downward, so that the user can place the upper part of the engine exhaust pipe into the clearance notch 22 through the opening of the clearance notch 22, which is convenient for installation. The distance between the upper wall of the clearance notch 22 and the upper wall of the rear crossbeam 2 is set to D6, and satisfies: 160mm≤D6≤180mm, that is, the distance D6 between the upper wall of the clearance notch 22 and the upper wall of the rear crossbeam 2 can be set to 160mm, 163mm, 166mm, 169mm, 172mm, 175mm, 178mm or 180mm, etc. Preferably, in this embodiment, the distance D6 between the upper wall of the clearance notch 22 and the upper wall of the rear crossbeam 2 can be set to 170.2mm.

[0167] Thus, setting the distance D6 between the upper wall of the clearance notch 22 and the upper wall of the rear crossbeam 2 to satisfy 160mm≤D6≤180mm can ensure the reliability of clearance for the engine exhaust pipe and avoid excessive opening depth of the clearance notch 22, which would result in low structural strength of the rear crossbeam 2. This ensures the structural strength and durability of the rear crossbeam 2 and improves safety in use.

[0168] In other embodiments, the rear crossbeam 2 is constructed as a single piece, connecting the two frame longitudinal beams 3. The single-piece construction of the rear crossbeam 2 facilitates manufacturing, improves production efficiency, and enhances the structural strength of the rear crossbeam 2.

[0169] In addition, in actual setup, the rear crossbeam 2 can be set as a front plate and a rear plate according to production needs, and the front plate and the rear plate can be welded together to form a complete rear crossbeam 2, which can reduce production difficulty and reduce production costs.

[0170] In some embodiments, the electric drive assembly 101 is powered by two drive shafts 102, both of which extend laterally along the vehicle and are respectively inserted through the clearance space 51 of the two frame longitudinal beams 3.

[0171] Specifically, the electric drive assembly 101 is located within the electric drive housing space 6, that is, the electric drive assembly 101 is located inside the subframe 100. The electric drive assembly 101 is powered by a drive shaft 102, as shown in Figure 8. There are two drive shafts 102, which are powered by the left and right sides of the electric drive assembly 101 respectively. The two drive shafts 102 extend in a direction away from each other, and both drive shafts 102 extend laterally along the vehicle. The drive shafts 102 can pass through the clearance space 51 to the outside of the electric drive housing space 6. There are two frame longitudinal beams 3, and each of the two frame longitudinal beams 3 forms an arch structure 5. A clearance space 51 is formed below each of the two arch structures 5.

[0172] Thus, when the electric drive assembly 101 is installed in the electric drive housing space 6, the two drive shafts 102 can be respectively passed through the clearance space 51 of the two frame longitudinal beams 3 to extend to the outside of the subframe 100, and can then be connected to the wheels on both sides to control the rotation of the wheels. This way, only one electric drive assembly 101 needs to be installed for each of the two wheels, reducing installation costs and improving weight reduction.

[0173] In some embodiments, the front crossbeam 1 is provided with a front electric drive mounting point 11, and each frame longitudinal beam 3 is provided with a rear electric drive mounting point 33. The arch structure 5 is located between the rear electric drive mounting point 33 and the front crossbeam 1. The front electric drive mounting point 11 and the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are all used to install the electric drive assembly 101.

[0174] Specifically, a front crossbeam 1 is provided on the front side of the subframe 100. The front crossbeam 1 extends laterally along the vehicle and its two ends are connected to two frame longitudinal beams 3 by welding or other means. The front crossbeam 1 is provided with a front electric drive mount mounting point 11, which runs through the front crossbeam 1 along the front-rear direction of the vehicle. The front electric drive mount mounting point 11 can be used to install motor mounts. Both frame longitudinal beams 3 are provided with rear electric drive mount mounting points 33, which run through the corresponding frame longitudinal beams 3 in the left-right direction. The rear electric drive mount mounting points 33 are also used to install motor mounts.

[0175] In this way, the electric drive assembly 101 can be connected to the motor mount, which can support the electric drive assembly 101, reduce the static displacement of the electric drive assembly 101, and prevent the vibration source of the electric drive assembly 101 itself from being transmitted to the vehicle body, thereby improving the NVH performance of the whole vehicle and improving user comfort. Setting multiple motor mounts can improve the installation reliability, and the forces generated by the electric drive assembly 101 in all directions can be damped by the motor mount, improving the vibration damping effect.

[0176] In some embodiments, the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are directly opposite each other along the vehicle's transverse direction, and the front electric drive mounting points 11 and the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are distributed in an isosceles triangle.

[0177] Specifically, both longitudinal beams 3 of the vehicle frame are provided with rear electric drive mounting points 33, so that both sides of the electric drive assembly 101 can be connected to the two longitudinal beams 3 of the vehicle frame through motor mounts respectively. The rear electric drive mounting points 33 of the two longitudinal beams 3 of the vehicle frame are directly opposite each other along the lateral direction of the vehicle, so that the connection between the electric drive assembly 101 and the two longitudinal beams 3 of the vehicle frame is symmetrically distributed on both sides of the electric drive assembly 101. This ensures the symmetry of the left and right sides when the vehicle is set up, so that the vibration generated on both sides during vehicle operation is equal, thereby ensuring the vehicle's operating performance, avoiding deviation of the vehicle at high speed, and improving driving stability.

[0178] Furthermore, the front electric drive mounting point 11 is located on the front crossbeam 1 and in the middle of the front crossbeam 1. The two rear electric drive mounting points 33 are located behind the front electric drive mounting point 11, so that the front electric drive mounting point 11 and the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are distributed in an isosceles triangle. The isosceles triangle has stability, which can improve the installation reliability of the electric drive assembly 101 and make the force symmetrically distributed on both sides of the subframe 100, thereby improving the vehicle driving stability.

[0179] In some embodiments, the distance between the rear electric drive mounting point 33 and the rear crossbeam 2 is less than the distance between the rear electric drive mounting point 33 and the front crossbeam 1.

[0180] Specifically, the two ends of the front crossbeam 1 are connected to the two frame longitudinal beams 3 respectively, and the two ends of the rear crossbeam 2 are also connected to the two frame longitudinal beams 3 respectively. The rear electric drive mounting point 33 is set on the frame longitudinal beam 3. As shown in Figure 6, the distance between the rear electric drive mounting point 33 and the rear crossbeam 2 is smaller than the distance between the rear electric drive mounting point 33 and the front crossbeam 1. That is, the distance between the rear electric drive mounting point 33 and the rear crossbeam 2 is smaller, and the distance between the rear electric drive mounting point 33 and the front crossbeam 1 is larger, which makes the rear electric drive mounting point 33 close to the rear crossbeam 2.

[0181] Thus, the front electric drive mounting point 11 can be connected to the front of the electric drive assembly 101, and the two rear electric drive mounting points 33 can be connected to the rear of the electric drive assembly 101. This allows both the front and rear of the electric drive assembly 101 to be connected to the subframe 100, improving installation reliability. It also allows the weight of the electric drive assembly 101 to be distributed to the front and rear sides of the subframe 100, ensuring the overall structural strength of the subframe 100, thereby improving the durability of the subframe 100 and ensuring safety in use.

[0182] In some embodiments, the distance between the top of the drive shaft 102 and the inner top wall of the clearance space 51 is L1, and satisfies: 10mm≤L1≤15mm.

[0183] Specifically, the electric drive assembly 101 is poweredly connected to the drive shaft 102, and the drive shaft 102 extends from the clearance space 51 to the outside of the electric drive housing space 6. The arched structure 5 arches upward, so that the clearance space 51 has an inner top wall, and the distance between the top of the drive shaft 102 and the inner top wall of the clearance space 51 is L1, which satisfies: 10mm≤L1≤15mm. That is, the distance L1 between the top of the drive shaft 102 and the inner top wall of the clearance space 51 can be set to 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm or 15mm, etc.

[0184] Preferably, in this embodiment, the distance L1 between the top of the drive shaft 102 and the inner top wall of the clearance space 51 can be set to 12.7mm, which can ensure that when the wheel moves to the uppermost position, there is sufficient movement clearance between the top of the drive shaft 102 and the arch structure 5, so as to avoid the arch structure 5 causing movement interference to the drive shaft 102, and can ensure the operational reliability of the drive shaft 102 and the wheel and other structures.

[0185] In some embodiments, the front end of the frame longitudinal beam 3 is provided with a front body mounting part 34, the rear end of the frame longitudinal beam 3 is provided with a rear body mounting part 35, the distance between the center of the drive shaft 102 and the front body mounting part 34 is L2, and satisfies: 310mm≤L2≤330mm, the distance between the center of the drive shaft 102 and the rear body mounting part 35 is L3, and satisfies: 460mm≤L3≤480mm.

[0186] Specifically, the frame longitudinal beam 3 extends along the front-rear direction of the vehicle, and the front and rear ends of the frame longitudinal beam 3 are connected to the vehicle body, as shown in Figure 1. The front end of the frame longitudinal beam 3 is provided with a front vehicle body mounting part 34, which can be configured as a mounting sleeve 1051. The mounting sleeve 1051 can be connected to the front end of the frame longitudinal beam 3 by welding or other means. The rear end of the frame longitudinal beam 3 is provided with a rear vehicle body mounting part 35, which can also be configured as a mounting sleeve 1051. The mounting sleeve 1051 can be connected to the rear end of the frame longitudinal beam 3 by welding or other means. Thus, both the front and rear ends of the frame longitudinal beam 3 can be connected to the vehicle body through the mounting sleeve 1051, which can increase the connection area and ensure the reliability of the connection.

[0187] Furthermore, the drive shaft 102 passes through the clearance space 51, that is, the drive shaft 102 is located between the front vehicle mounting part 34 and the rear vehicle mounting part 35 in the longitudinal direction. The distance between the center of the drive shaft 102 and the front vehicle mounting part 34 is set to L2, and satisfies: 310mm≤L2≤330mm. That is, the distance L2 between the center of the drive shaft 102 and the front vehicle mounting part 34 can be set to 310mm, 313mm, 316mm, 319mm, 320mm, 323mm, 326mm, 319mm or 330mm, etc. Preferably, in this embodiment, the distance L2 between the center of the drive shaft 102 and the front vehicle mounting part 34 can be set to 319mm.

[0188] In addition, the distance between the center of the drive shaft 102 and the rear vehicle mounting part 35 is set to L3, and satisfies: 460mm≤L3≤480mm, that is, the distance L3 between the center of the drive shaft 102 and the rear vehicle mounting part 35 can be set to 460mm, 463mm, 466mm, 469mm, 470mm, 473mm, 476mm, 479mm or 480mm, etc. Preferably, in this embodiment, the distance L3 between the center of the drive shaft 102 and the rear vehicle mounting part 35 can be set to 471mm.

[0189] Thus, when the rear subframe assembly 1000 is mounted on the rear part of the vehicle body under the vehicle body via the front body mounting part 34 and the rear body mounting part 35, the position of the electric drive assembly 101 in the longitudinal direction of the vehicle and the position of the drive shaft 102 in the longitudinal direction of the vehicle can be guaranteed, thereby ensuring the reliability of the connection between the drive shaft 102 and the two rear wheels of the vehicle.

[0190] In some embodiments, the arched structure 5 is located between the front body mounting portion 34 and the middle portion of the frame longitudinal beam 3, and the bottom surface of both the front body mounting portion 34 and the bottom surface of the middle portion of the frame longitudinal beam 3 are lower than the bottom surface of the rear end of the rear body mounting portion 35.

[0191] Specifically, the longitudinal beam 3 of the frame has an upwardly protruding arched structure 5. The front body mounting part 34 is located at the front end of the longitudinal beam 3 of the frame, and the rear body mounting part 35 is located at the rear end of the longitudinal beam 3 of the frame. That is, the arched structure 5 is located between the front body mounting part 34 and the rear body mounting part 35, and the arched structure 5 is located between the front body mounting part 34 and the middle of the longitudinal beam 3 of the frame. That is, the arched structure 5 is located close to the front of the longitudinal beam 3 of the frame, so that the distance between the arched structure 5 and the front body mounting part 34 is relatively close. The front of the electric drive assembly 101 is connected to the front electric drive mounting point 11 of the front crossbeam 1, so that the front of the subframe 100 needs to bear the weight of the electric drive assembly 101, etc. The arched structure 5 can improve the structural strength of the longitudinal beam 3 of the frame. By setting the arched structure 5 between the front body mounting part 34 and the middle of the longitudinal beam 3 of the frame, the overall structural strength of the front of the subframe 100 can be improved, so as to ensure the overall durability of the subframe 100 and improve the safety of use.

[0192] In addition, the bottom surface of the front body mounting part 34 is set to be lower than the bottom surface of the rear end of the rear body mounting part 35, and the bottom surface of the middle part of the frame longitudinal beam 3 is also set to be lower than the bottom surface of the rear end of the rear body mounting part 35. That is, when the electric drive assembly 101 and other structures are mounted on the subframe 100, the center of gravity of the rear subframe assembly 1000 is located at the front of the rear subframe assembly 1000. The arched structure 5 is set close to the front crossbeam 1, which makes the structural strength of the front of the subframe 100 higher, thereby ensuring the overall reliability of the rear subframe assembly 1000 and improving the safety of vehicle use.

[0193] In some embodiments, the height difference L4 between the front vehicle mounting portion 34 and the rear vehicle mounting portion 35 satisfies: 100mm≤L4≤120mm.

[0194] Specifically, the front body mounting part 34 is located at the front end of the frame longitudinal beam 3, and the rear body mounting part 35 is located at the rear end of the frame longitudinal beam 3. The front body mounting part 34 and the rear body mounting part 35 have a height difference. In this embodiment, the front body mounting part 34 is set to be lower than the rear body mounting part 35 to ensure the overall reliability of the rear subframe assembly 1000. As shown in Figure 3, the height difference between the front body mounting part 34 and the rear body mounting part 35 is set to L4, and satisfies: 100mm≤L4≤120mm. That is, the height difference L4 between the front body mounting part 34 and the rear body mounting part 35 can be set to 100mm, 102.5mm, 105mm, 107.5mm, 110mm, 112.5mm, 115mm, 117.5mm or 120mm, etc.

[0195] Preferably, in this embodiment, the height difference L4 between the front body mounting part 34 and the rear body mounting part 35 can be set to 108.5mm, thereby making the center of gravity of the rear subframe assembly 1000 located at the front of the rear subframe assembly 1000. The arched structure 5 is set close to the front body mounting part 34, and the arched structure 5 has high structural strength, which makes the structural strength of the front of the subframe 100 high. This can ensure the accuracy of the relative positions of other structures installed on the rear subframe assembly 1000, such as the front lower control arm, the rear upper control arm, the front toe bar, and the rear lower control arm, and can also ensure the position of the vehicle's center of gravity, thereby improving the vehicle's operational stability.

[0196] In other embodiments, the distance between the front vehicle mounting portion 34 and the rear vehicle mounting portion 35 is d1, and satisfies: 780mm≤d1≤800mm.

[0197] Specifically, the frame longitudinal beam 3 extends along the longitudinal direction of the vehicle, and the front body mounting part 34 is located at the front end of the frame longitudinal beam 3, while the rear body mounting part 35 is located at the rear end of the frame longitudinal beam 3. That is, the front body mounting part 34 and the rear body mounting part 35 are spaced apart along the longitudinal direction of the vehicle. The distance between the front body mounting part 34 and the rear body mounting part 35 is set as d1, and satisfies: 780mm≤d1≤800mm. That is, the distance d1 between the front body mounting part 34 and the rear body mounting part 35 can be set to 780mm, 782.5mm, 785mm, 787.5mm, 790mm, 792.5mm, 795mm, 797.5mm or 800mm, etc.

[0198] Preferably, in this embodiment, the distance d1 between the front body mounting part 34 and the rear body mounting part 35 can be set to 791mm. Setting the distance d1 between the front body mounting part 34 and the rear body mounting part 35 to satisfy: 780mm≤d1≤800mm can ensure the reliability of the electric drive housing space 6 for accommodating the electric drive assembly 101, and can avoid the front and rear dimensions of the subframe 100 being too large, which would affect the vehicle's lightweight design and ensure the vehicle's range performance.

[0199] Meanwhile, a steering gear 103 is provided at the rear end of the subframe 100. The steering gear 103 is mounted on the rear crossbeam 2. The rear crossbeam 2 is also provided with a clearance opening 22 for avoiding the exhaust pipe of the engine. The exhaust pipe of the engine is connected to a muffler. When the exhaust pipe exhausts, the muffler will heat up. The distance d1 between the front body mounting part 34 and the rear body mounting part 35 is set to meet the following condition: 780mm≤d1≤800mm. This also avoids the steering gear 103 from being too close to the muffler, which would affect the service life of the steering gear 103, so as to ensure the reliability of the steering gear 103.

[0200] In some embodiments, the inner wall surface 50 of the clearance space 51 includes a front wall surface 52 and a rear wall surface 53, which are connected to the inner apex of the clearance space 51, wherein the extension length of the front wall surface 52 is greater than the extension length of the rear wall surface 53.

[0201] Specifically, a clearance space 51 is formed below the arched structure 5 to allow clearance from the drive shaft 102, ensuring the reliability of the drive shaft 102 in driving the wheels. The inner wall surface 50 of the clearance space 51 is configured as a front wall surface 52 and a rear wall surface 53. Both the front wall surface 52 and the rear wall surface 53 are arc-shaped surfaces. The front wall surface 52 is located at the front of the clearance space 51, and the rear wall surface 53 is located at the rear of the clearance space 51. The rear end of the front wall surface 52 is connected to the front end of the rear wall surface 53, and the front wall surface 52 and the rear wall surface 53 are connected to the inner apex of the clearance space 51, making the inner wall of the clearance space 51 transition evenly to ensure the reliability of clearance from the drive shaft 102.

[0202] Furthermore, the extension length of the front wall 52 is set to be greater than the extension length of the rear wall 53, that is, the extension length of the front part of the arch structure 5 is set to be longer, and the extension length of the rear part of the arch structure 5 is set to be shorter. The front part of the arch structure 5 is the front end of the frame longitudinal beam 3, which is connected to the front body mounting part 34, and the rear part of the arch structure 5 is the rear end of the frame longitudinal beam 3, which is connected to the rear body mounting part 35. By setting the extension length of the front wall 52 to be greater than the extension length of the rear wall 53, the front body mounting part 34 is located below the rear body mounting part 35 in the height direction, which can ensure the structural strength of the front part of the subframe 100 and thus ensure the safety of use.

[0203] In addition, the frame longitudinal beam 3 is 100mm wide in the left and right directions of the vehicle, which can ensure the structural strength of the frame longitudinal beam 3 and improve the overall structural strength of the subframe 100. Furthermore, the two sides of the electric drive assembly 101 are connected to the frame longitudinal beam 3, thereby improving the installation reliability of the electric drive assembly 101.

[0204] In some embodiments, the electric drive housing 6 includes a front housing 61 and a rear housing 62. The front housing 61 is connected to the front side of the rear housing 62, that is, the front housing 61 is located on the front side and the rear housing 62 is located on the rear side, and the front housing 61 and the rear housing 62 are connected to each other, so as to facilitate the installation of structural components in the front housing 61 and the rear housing 62 respectively.

[0205] Further, as shown in Figure 6, the front accommodating space 61 is formed between the front parts of the two frame longitudinal beams 3. That is, the front accommodating space 61 is the space formed by the front parts of the two frame longitudinal beams 3 being spaced apart. The electric drive assembly 101 includes a reducer 1002 and a drive motor 1001. The front accommodating space 61 is used to accommodate the reducer 1002 and the drive shaft 102. That is, the reducer 1002 and the drive shaft 102 are installed and accommodated in the front part of the subframe 100. The reducer 1002 is an important structure of the electric drive assembly 101. It is used to reduce the speed of the drive motor 1001 and increase the torque so as to drive the wheels. The output torque of the reducer 1002 can be transmitted to the wheels through the drive shaft 102 to ensure the stable driving of the vehicle.

[0206] The clearance space 51 is connected to the front accommodating space 61. Since the front of the frame longitudinal beam 3 is provided with an arched structure 5, which arches upward to form a clearance space 51 below the arched structure 5, the clearance space 51 is connected to the front accommodating space 61 to a certain extent, which is conducive to better installation and accommodation of the reducer 1002 and the drive shaft 102. At the same time, it also allows the drive shaft 102 to avoid the frame longitudinal beam 3, so that the drive shaft 102 can be smoothly connected to the wheel, thereby ensuring the reliability of power transmission. The drive shaft 102 can move freely in the clearance space 51 without being obstructed by the frame longitudinal beam 3 and interfering or colliding with the frame longitudinal beam 3, thus ensuring the operational reliability of the drive shaft 102.

[0207] This ensures the normal and stable operation of the reducer 1002 and the drive shaft 102, reduces the frictional loss of the drive shaft 102, and effectively prevents the drive shaft 102 from impacting the front section 30 of the longitudinal beam when the wheel bounces upward to drive the drive shaft 102 to move upward, thus avoiding noise and damage. It also prevents the drive shaft 102 from impacting the front section 30 of the longitudinal beam when it moves forward, backward or in other directions, thus avoiding noise and damage.

[0208] As shown in Figure 6, the rear accommodating space 62 is formed between the rear parts of the two frame longitudinal beams 3. That is, the rear accommodating space 62 is a space formed by the gap between the rear parts of the two frame longitudinal beams 3. The rear accommodating space 62 is used to accommodate the drive motor 1001. That is, the drive motor 1001 is installed and accommodated in the rear of the subframe 100. The drive motor 1001 is the core component of the electric drive assembly 101 and is used to provide power to drive the vehicle forward. The drive motor 1001 can transmit power to the reducer 1002, and then the reducer 1002 reduces speed and increases torque, and then transmits it to the drive shaft 102. The drive shaft 102 drives the wheels to rotate, so as to realize the forward movement of the vehicle.

[0209] Therefore, by installing and accommodating the reducer 1002 and drive shaft 102 in the front accommodating space 61, and installing and accommodating the drive motor 1001 in the rear accommodating space 62, the space between the longitudinal beams 3 of the frame is fully utilized to achieve a reasonable allocation and installation of the electric drive assembly 101, improve space utilization, make the layout of the electric drive assembly 101 more compact, and facilitate installation, disassembly and maintenance.

[0210] In some embodiments, the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32. Both the inner plate portion 31 and the outer plate portion 32 are constructed as grooves. The inner plate portion 31 and the outer plate portion 32 are fastened together and pressed together. A portion of the inner plate portion 31 and a portion of the outer plate portion 32 together form an arched structure 5.

[0211] Specifically, the frame longitudinal beam 3 can be integrally formed or welded together from an inner plate 31 and an outer plate 32, offering high flexibility. As shown in Figure 5, in this embodiment, the frame longitudinal beam 3 has an inner plate 31 and an outer plate 32. The inner plate 31 is located on the inner side of the frame longitudinal beam 3, and the outer plate 32 is located on the outer side of the frame longitudinal beam 3. Both the inner plate 31 and the outer plate 32 are constructed as grooves and are fastened together. This results in a cavity formed inside the frame longitudinal beam 3 after the inner plate 31 and the outer plate 32 are connected. This cavity can reduce the overall weight of the subframe 100, thereby improving vehicle lightweighting. Furthermore, when force is transmitted to the frame longitudinal beam 3, the cavity inside the frame longitudinal beam 3 can buffer the force, thereby reducing the effect of the force, improving safety, and enhancing the overall NVH performance of the vehicle, thus improving user comfort.

[0212] In addition, a portion of the inner panel 31 and a portion of the outer panel 32 can together form an arched structure 5, that is, the arched structure 5 can be evenly distributed in the width direction of the longitudinal beam 3 of the frame, thereby enhancing the structural strength of the arched structure 5 of the longitudinal beam 3 of the frame, and ensuring that the forces transmitted through the longitudinal beam 3 in the front-rear direction are all transmitted to the arched structure 5 to weaken the forces, ensure the overall structural strength of the subframe 100, and improve the reliability of use.

[0213] In some embodiments, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is L6, and satisfies: 125mm≤L6≤145mm.

[0214] Specifically, the arched structure 5 arches upwards, forming a clearance space 51 below it. The clearance space 51 is set to open downwards and has a highest point. The height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is set to L6, and satisfies: 125mm≤L6≤145mm. That is to say, the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 can be set to 125mm, 126mm, 127mm, 128mm, 129mm, 130mm, 131mm, 132mm, 133mm, 134mm, 135mm, 136mm, 137mm, 138mm, 139mm, 140mm, 141mm, 142mm, 143mm, 144mm, 145mm or other values ​​within the range of 125mm to 145mm.

[0215] It is understandable that the greater the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3, that is, the higher the highest point of the clearance space 51 and the lower the lowest point of the front end of the frame longitudinal beam 3, the larger the clearance space 51 will be. However, this will cause the arched structure 5 to arch upward to a greater degree, resulting in a more complex structure, an increase in the vertical dimension occupied by the entire subframe 100 in the vehicle, and an increase in the overall weight of the subframe 100.

[0216] Therefore, by setting the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 within a reasonable range of 125mm to 145mm, the overall size of the subframe 100 in the vertical direction of the vehicle can be effectively reduced, while the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 can be smaller. This makes the subframe 100 structure simpler, lighter, and improves load transfer efficiency.

[0217] In addition, as shown in Figure 7, the height difference between the highest point of the clearance space 51 and the lowest point of the middle part of the frame longitudinal beam 3 is L7, and satisfies: 80mm≤L7≤90mm. Preferably, the height difference L7 between the highest point of the clearance space 51 and the lowest point of the middle part of the frame longitudinal beam 3 is set to 82mm. This can effectively reduce the size occupied by the entire subframe 100 in the vertical direction of the vehicle, while making the height difference L7 between the highest point of the clearance space 51 and the lowest point of the middle part of the frame longitudinal beam 3 smaller. This makes the subframe 100 structure simpler, lighter, and improves the load transfer efficiency.

[0218] In other embodiments, the height of the arch structure 5 along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm.

[0219] Specifically, as shown in Figure 7, the height of the arch structure 5 along the vertical direction of the vehicle is set to H1, and satisfies: 70mm≤H1≤80mm, that is, the height H1 of the arch structure 5 along the vertical direction of the vehicle can be set to 70mm, 71mm, 72mm, 73mm, 74mm, 75mm, 76mm, 77mm, 78mm, 79mm or 80mm, etc. Preferably, in this embodiment, the height H1 of the arch structure 5 along the vertical direction of the vehicle can be set to 74.4mm.

[0220] It is understandable that the greater the height H1 of the arch structure 5 along the vertical direction of the vehicle, the greater the structural strength of the arch structure 5, the lower the apex of the clearance space 51, which will make the clearance space 51 smaller, and will also make the arch structure 5 more complex, increase the size occupied by the entire subframe 100 in the vertical direction of the vehicle, and increase the overall weight of the subframe 100.

[0221] Therefore, by setting the height H1 of the arch structure 5 along the vertical direction of the vehicle within a reasonable range of 70mm to 80mm, the vertical dimensions of the entire subframe 100 in the vertical direction of the vehicle can be effectively reduced while ensuring the structural strength of the longitudinal beam 3 of the frame. At the same time, the height of the arch structure 5 along the vertical direction of the vehicle can be set to be smaller, which makes the subframe 100 structure simpler, lighter, and improves the load transfer efficiency.

[0222] In addition, the height of the middle part of the longitudinal beam 3 along the vertical direction of the vehicle is set to L9, and satisfies: 100mm≤L9≤110mm. The height of the rear end of the longitudinal beam 3 along the vertical direction of the vehicle is set to L8, and satisfies: 70mm≤L8≤80mm. Preferably, in this embodiment, the height L9 of the middle part of the longitudinal beam 3 along the vertical direction of the vehicle is set to 106.7mm, and the height L8 of the rear end of the longitudinal beam 3 along the vertical direction of the vehicle is set to 83mm. This can effectively reduce the size occupied by the entire subframe 100 in the vertical direction of the vehicle and ensure the structural strength of the longitudinal beam 3, while making the subframe 100 structure simpler, lighter, and improving the load transfer efficiency.

[0223] As shown in Figures 5-7, the longitudinal beam 3 of the frame is provided with a front upper arm mounting bracket 40 at the upper front end of the arch structure 5 and a front lower arm mounting bracket 41 at the lower front end. The longitudinal beam 3 of the frame is provided with a rear upper arm mounting bracket 42 at the upper rear end and a rear lower arm mounting bracket 43 at the lower rear end. The front lower arm mounting bracket 41 is located in front of the front upper arm mounting bracket 40, and the rear lower arm mounting bracket 43 is located in front of the rear upper arm mounting bracket 42. The front upper arm mounting bracket 40, the front lower arm mounting bracket 41, the rear lower arm mounting bracket 43, and the rear upper arm mounting bracket 42 are all used to mount the control arm.

[0224] Furthermore, the front upper arm mounting bracket 40 is provided with a front upper arm mounting part 401, which can be configured as a mounting hole, etc., so that the control arm can be connected to the front upper arm mounting bracket 40 via bolts or other structures. The front lower arm mounting bracket 41 is provided with a front lower arm mounting part 411, which can be configured as a mounting hole, etc., so that the control arm can be connected to the front lower arm mounting bracket 41 via bolts or other structures. The rear upper arm mounting bracket 42 is provided with a rear upper arm mounting part 421, which can be configured as a mounting hole, etc., so that the control arm can be connected to the rear upper arm mounting bracket 42 via bolts or other structures. The rear lower arm mounting bracket 43 is provided with a rear lower arm mounting part 433, which can be configured as a mounting hole, etc., so that the control arm can be connected to the rear lower arm mounting bracket 43 via bolts or other structures. The structure is simple, the installation is convenient, and the installation cost is low.

[0225] In addition, the rear lower arm mounting bracket 43 includes a plate 431 arranged front and rear and a reinforcing plate 432 located between the two plates 431. The rear lower arm mounting part 433 is set on the two plates 431, which can ensure the connection reliability of the control arm connected to the rear lower arm mounting bracket 43. The rear end of the longitudinal beam 3 of the vehicle frame can also be provided with a rear suspension toe rod mounting part. The rear suspension toe rod mounting part is used to install one end of the rear suspension toe rod, and the other end of the rear suspension toe rod is suitable for connection with the steering knuckle to ensure the reliability of vehicle operation.

[0226] Furthermore, the rear crossbeam 2 is also provided with a toe adjustment clearance hole 21 that runs through the front and rear directions. The toe adjustment clearance hole 21 is used to avoid the adjustment tools of the rear suspension toe rod, which improves the convenience of maintenance and saves maintenance time.

[0227] This application also proposes a vehicle.

[0228] The vehicle according to the embodiments of this application includes the rear subframe assembly 1000 of any of the above.

[0229] According to the vehicle embodiment of this application, by providing an electric drive housing space 6, a clearance space 51, and a steering gear clearance hole 20, the overall space occupied by the rear subframe assembly 1000 can be reduced, thereby improving the overall integration of the rear subframe assembly 1000, which in turn can improve the vehicle's lightweight design, ensure the vehicle's range performance, and improve the user experience. Furthermore, at least a portion of each frame longitudinal beam 3 is constructed as an arched structure 5, which can improve the structural strength and durability of the subframe 100, thereby ensuring the safety of the rear subframe assembly 1000 in use, resulting in better performance and a wider range of applications.

[0230] The rear subframe assembly 1000 according to an embodiment of this application is described below with reference to Figures 6, 7, and 9-13. The arched structure 5 of the longitudinal beam 3 of the rear subframe assembly 1000 can improve strength, and the electric drive assembly 101 is installed in the electric drive housing space 6. The drive shaft 102 extends to the clearance space 51 formed by the arched structure 5, which has high integration and saves space.

[0231] As shown in Figures 9-13, a rear subframe assembly 1000 according to one embodiment of the present application includes: a subframe 100 and an electric drive assembly 101.

[0232] The subframe 100 includes a front crossbeam 1, a rear crossbeam 2, and two frame longitudinal beams 3. The front crossbeam 1 and the rear crossbeam 2 are distributed longitudinally along the vehicle and are respectively connected between the two frame longitudinal beams 3 to jointly define the electric drive housing space 6. At least part of each frame longitudinal beam 3 is constructed as an arch structure 5, which arches upward and forms a clearance space 51 below the arch structure 5. The electric drive assembly 101 is installed in the electric drive housing space 6 and is poweredly connected to a drive shaft 102. The drive shaft 102 passes through the clearance space 51 to the outside of the electric drive housing space 6.

[0233] In practice, the subframe 100 is a frame structure formed by the front crossbeam 1, the rear crossbeam 2, and two frame longitudinal beams 3. The subframe 100 is installed as a whole under the rear of the vehicle. At least part of the two frame longitudinal beams 3 of the subframe 100 are arched structures 5. As in the embodiment of this application, an arched structure 5 can be partially set at the front of the frame longitudinal beam 3. The frame longitudinal beam 3 with the arched structure 5 has good stability and good buffering capacity, and can effectively absorb and disperse impact force. The arched structure 5 can evenly transfer the gravity load to different positions, so that the entire structure can withstand greater force and improve strength.

[0234] The electric drive housing space 6 is defined between the two frame longitudinal beams 3 and the front crossbeam 1 and the rear crossbeam 2. The electric drive housing space 6 can be equipped with an electric drive assembly 101. The electric drive assembly 101 is connected to the wheels via the drive shaft 102, that is, it outputs power to the wheels.

[0235] Furthermore, the bottom of the arched structure 5 forms a clearance space 51. When the electric drive assembly 101 is installed in the electric drive housing space 6, the electric drive assembly 101 shares a portion of the height space with the front crossbeam 1 and the rear crossbeam 2 along the vehicle's height direction. This ensures the installation of the electric drive assembly 101 while saving space in the vehicle's height direction. In addition, the drive shaft 102 extends to the clearance space 51, resulting in a higher degree of integration of the entire structure, saving space while ensuring strength.

[0236] Furthermore, the clearance space 51 formed below the arched structure 5 can provide a certain enveloping space when the drive shaft 102 floats up and down or left and right, which not only reserves room for the drive shaft 102 to move, but also improves the strength of the frame longitudinal beam 3.

[0237] In some embodiments, the electric drive assembly 101 is powered by two drive shafts 102, both of which extend laterally along the vehicle and are respectively inserted through the clearance space 51 of the two frame longitudinal beams 3.

[0238] In practice, the electric drive assembly 101 outputs power to two drive shafts 102 connected at both ends. The two drive shafts 102 are connected to the two wheels on the lateral side of the vehicle. Each drive shaft 102 extends to the clearance space 51 at the bottom of the arched structure 5 of the corresponding frame longitudinal beam 3. The two drive shafts 102 can be driven simultaneously by one electric drive assembly 101, which has a higher degree of integration, saves space, and saves costs.

[0239] In some embodiments, the front crossbeam 1 is provided with a front electric drive mounting point 11, and each frame longitudinal beam 3 is provided with a rear electric drive mounting point 33. The arch structure 5 is located between the rear electric drive mounting point 33 and the front crossbeam 1. The front electric drive mounting point 11 and the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are all used to install the electric drive assembly 101.

[0240] In other words, the rear sides of the electric drive assembly 101 along the vehicle's longitudinal direction are suitable for connection with the two rear electric drive mounting points 33. The connection on the side of the electric drive assembly 101 closer to the rear crossbeam 2 has better stability, while the side of the electric drive assembly 101 facing the front crossbeam 1 is suitable for connection with the front crossbeam 1 via the front electric drive mounting point 11, thereby reducing the connection complexity of the electric drive assembly 101. At the same time, the drive shaft 102, which is powered by the electric drive assembly 101, is located within the clearance space 51 formed at the bottom of the arched structure 5. This is equivalent to the drive shaft 102 being located between the line connecting the two rear electric drive mounting points 33 and the front crossbeam 1. At this time, the drive shaft 102 is basically in the middle position of the electric drive assembly 101 along the vehicle's longitudinal direction, thus ensuring force balance. Furthermore, the drive shaft 102 is powered by the wheels, and when the vehicle travels on different road sections, the drive shaft 102 can move within the clearance space 51 formed by the arched structure 5, leaving a buffer space.

[0241] In some embodiments, the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are directly opposite each other along the vehicle's transverse direction, and the front electric drive mounting points 11 and the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are distributed in an isosceles triangle.

[0242] In practice, the front electric drive mount point 11 is located at the middle of the front crossbeam 1 along the vehicle's transverse direction. At the same time, the rear electric drive mount points 33 of the two frame longitudinal beams 3 are directly opposite each other along the vehicle's transverse direction. Therefore, the distance between the front electric drive mount point 11 and the rear electric drive mount point 33 of one frame longitudinal beam 3 is equal to the distance between the front electric drive mount point 11 and the rear electric drive mount point 33 of the other frame longitudinal beam 3. Meanwhile, the center of mass of the electric drive assembly 101 is coplanar with the plane formed by the front electric drive mount point 11 and the rear electric drive mount points 33 of the two frame longitudinal beams 3. This avoids excessive swaying of the electric drive assembly 101 during operation and allows for more even force distribution when the electric drive assembly 101 is connected between the two frame longitudinal beams 3 and the front crossbeam 1.

[0243] In some embodiments, the distance between the rear electric drive mounting point 33 and the rear crossbeam 2 is less than the distance between the rear electric drive mounting point 33 and the front crossbeam 1.

[0244] That is, when the electric drive assembly 101 is installed between the front crossbeam 1, the rear crossbeam 2 and the frame longitudinal beam 3, there is a gap between the electric drive assembly 101 and the rear crossbeam 2. The center of gravity of the electric drive assembly 101 is biased towards the front side of the center of the subframe 100. The electric drive assembly 101 transmits power to the drive shaft 102. The front side of the subframe 100 is set with an arched structure 5, which means that the front structure is more stable and has a clearance space 51 to cooperate with the drive shaft 102. The arched structure 5 enhances the stability of the electric drive assembly 101. In addition, a motor controller and other components can be installed in the area between the rear electric drive mounting point 33 and the rear crossbeam 2 to achieve a reasonable spatial layout.

[0245] In some embodiments, as shown in FIG12, the distance between the top of the drive shaft 102 and the inner top wall of the clearance space 51 is L1, and satisfies: 10mm≤L1≤15mm.

[0246] In practice, the main reason for the movement of the drive shaft 102 of the vehicle's subframe 100 is to transmit power and torque. The main function of the drive shaft 102 is to transmit power to the wheels to propel the vehicle. When the electric drive assembly 101 is running, it drives the drive shaft 102 to move, thereby transmitting torque and power to the wheels. In other words, the drive shaft 102 must withstand the vibration and impact forces of the vehicle on the road surface.

[0247] When the vehicle travels on different road sections, the wheels are always floating. The floating of the wheels causes the drive shaft 102 to float up and down or back and forth with the wheels. For example, when the drive shaft 102 moves to the top of the clearance space 51 at the top of the arch structure 5, the distance between the top of the drive shaft 102 and the clearance space 51 is 12.67mm. In other words, by limiting the distance between the top of the drive shaft 102 and the inner top wall of the clearance space 51, it can be ensured that when the wheel moves to the top, the motion envelope of the drive shaft 102 and the arch structure 5 have sufficient motion clearance, thereby avoiding interference and collision between the drive shaft 102 and the arch structure 5 during movement, which would cause noise or limited movement.

[0248] In some embodiments, referring to FIG12, the front end of the frame longitudinal beam 3 is provided with a front body mounting part 34, and the rear end of the frame longitudinal beam 3 is provided with a rear body mounting part 35; the distance between the center of the drive shaft 102 and the front body mounting part 34 is L2, and satisfies: 310mm≤L2≤330mm, and the distance between the center of the drive shaft 102 and the rear body mounting part 35 is L3, and satisfies: 460mm≤L3≤480mm.

[0249] In practice, referring to Figure 6, the front ends of the two longitudinal beams 3 include two corresponding front body mounting parts 34, and the rear ends of the two longitudinal beams 3 include two corresponding rear body mounting parts 35. The subframe 100 is connected to the vehicle body through the front body mounting parts 34 and the rear body mounting parts 35. The distance between the center of the drive shaft 102 and the front body mounting part 34 can be 319mm, and the distance between the center of the drive shaft 102 and the rear body mounting part 35 can be 471mm. That is, the drive shaft 102 is generally biased towards the front side of the center of the subframe 100, and the front side of the electric drive assembly 101 is mounted at the front electric drive mounting point 11. The front side of the electric drive assembly 101 is more stable. By biasing the drive shaft 102 towards the front side of the center of the subframe 100, the stability of the drive shaft 102 under stress is improved.

[0250] In addition, the cross-sectional width of the arch structure 5 is designed to be uniform. For example, the width of the arch structure 5 can be set to 100mm along the front and rear direction of the vehicle. Of course, in practice, the width of the entire frame longitudinal beam 3 can also be set to 100mm from front to back to improve the strength and durability of the frame longitudinal beam 3.

[0251] In some embodiments, the arched structure 5 is located between the front body mounting portion 34 and the middle portion of the frame longitudinal beam 3, and the bottom surface of both the front body mounting portion 34 and the bottom surface of the middle portion of the frame longitudinal beam 3 are lower than the bottom surface of the rear end of the rear body mounting portion 35.

[0252] In other words, the rear side of the subframe 100 is closer to the horizontal state of the vehicle, while the front side is equipped with an arched structure 5. On the one hand, it can enhance the strength and stability of the front side, and on the other hand, it can avoid the drive shaft 102. The structure on the rear side, which is closer to the horizontal state of the vehicle, can better achieve the fit between the subframe 100 and the bottom of the vehicle.

[0253] Furthermore, the bottom surface of the front body mounting section 34 and the bottom surface of the middle part of the vehicle longitudinal beam are both lower than the rear body mounting section 35. In other words, the rear side of the vehicle subframe 100 is generally higher, which is adapted to the structure of the bottom rear side of the vehicle. The structure of the bottom rear side is higher than the height of the front side. The lower front side means that the center of gravity of the subframe 100 is closer to the ground than the rear side, which is conducive to improving stability. The higher rear side design helps to reduce wind resistance, reduce fuel consumption and noise.

[0254] In some embodiments, referring to FIG7, the height difference L4 between the front vehicle mounting portion 34 and the rear vehicle mounting portion 35 satisfies: 100mm≤L4≤120mm; and / or, the distance between the front vehicle mounting portion 34 and the rear vehicle mounting portion 35 is d1, and satisfies: 780mm≤d1≤800mm.

[0255] First, referring to Figure 7, by limiting the height difference between the front body mounting portion 34 and the rear body mounting portion 35, the subframe 100 avoids occupying too much space in the vehicle's height direction while meeting strength requirements and accommodating the electric drive assembly 101. This also allows for better adaptation to the rear lower structure of the vehicle while installing the electric drive assembly 101. For example, the distance between the front body mounting portion 34 and the rear body mounting portion 35 can be set to 108.5mm, thereby making each cantilever assembly more stable and its position layout more reasonable when installing the various cantilever components on the frame longitudinal beam 3, while the cantilever assembly connects to the steering knuckle of the wheel.

[0256] The distance between the front body mounting part 34 and the rear body mounting part 35 is d1, and satisfies: 780mm≤d1≤800mm, such as 791.155mm. By setting the distance between the front body mounting part 34 and the rear body mounting part 35, the length of the subframe 100 in the longitudinal direction of the vehicle can be limited. After the drive shaft 102 is connected to the wheel, a suitable gap can be left between the rear side of the subframe 100 and the exhaust system muffler located at the rear of the vehicle, and it will not be too close. When the gap between the rear side of the subframe 100 and the exhaust system muffler located at the rear of the vehicle is too close, the heat generated by the exhaust system muffler can affect the rubber sleeve 1051 of the rear body mounting part 35, thereby affecting the life of the rubber sleeve 1051. That is, the rear subframe assembly 1000 of this application embodiment can improve the life of the rubber sleeve 1051 of the rear body mounting part 35 and improve the reliability of the installation between the subframe 100 and the vehicle body.

[0257] The main functions of the subframe 100 and the rubber sleeve 1051 mounted on the body include isolating vibration and noise, improving the stiffness of the suspension connection, improving driving and riding comfort, and enhancing the torsional resistance of the body.

[0258] In some embodiments, the inner wall surface 50 of the clearance space 51 includes a front wall surface 52 and a rear wall surface 53, which are connected to the inner apex of the clearance space 51; wherein the extension length of the front wall surface 52 is greater than the extension length of the rear wall surface 53.

[0259] As shown in Figure 11, the extension length of the front wall 52 of the clearance space 51 is greater than the extension length of the rear wall 53. In this case, the rear end of the arched structure 5 is higher than the front end, which allows the front wall 52 and rear wall 53 to limit the drive shaft 102 while also ensuring that the rear of the frame longitudinal beam 3 is positioned higher than the front, thereby reducing wind resistance at the rear of the vehicle. Furthermore, the greater extension length of the front wall 52 compared to the rear wall 53 makes the transition between the rear wall 53 of the arched structure 5 and the higher rear side of the frame longitudinal beam 3 smoother.

[0260] In some embodiments, both the front wall surface 52 and the rear wall surface 53 are constructed as curved surfaces, and the radius of curvature of the front wall surface 52 is greater than the radius of curvature of the rear wall surface 53.

[0261] First, by setting both the front wall surface 52 and the rear wall surface 53 as curved surfaces, the top of the clearance space 51 formed between the front wall surface 52 and the rear wall surface 53 can be an arc-shaped curved surface. Then, when the vehicle travels to different road sections, the drive shaft 102 can move back and forth or up and down, and the outer periphery of the drive shaft 102 can cooperate more smoothly with the curved front wall surface 52 and the rear wall surface 53, thereby improving the stability of the vehicle.

[0262] In some embodiments, the distance between the top tangent of the drive shaft 102 connecting the front wall surface 52 and the rear wall surface 53 is L5, and satisfies: 130mm≤L5≤150mm.

[0263] Referring to Figure 12, when the drive shaft 102 moves to its highest point, the distance between the tangent at the top of the drive shaft 102 and the distance connecting the front wall surface 52 and the rear wall surface 53 can be 136.903mm or 141mm. This ensures that the motion envelope of the drive shaft 102 and the arched structure 5 have sufficient motion clearance when the wheel moves, thus avoiding motion interference. At the same time, it meets the requirements of the stamping process and the left and right suspension arrangement requirements of the electric drive assembly 101.

[0264] In some embodiments, the electric drive assembly 101 includes a drive motor 1001 and a reducer 1002. The drive motor 1001 transmits power to the drive shaft 102 through the reducer 1002. The electric drive housing 6 includes a front housing space 61 and a rear housing space 62. The front housing space 61 is connected to the front side of the rear housing space 62. The front housing space 61 is formed between the front sections 30 of the longitudinal beams of the two frame longitudinal beams 3, and the rear housing space 62 is formed between the rear sections of the longitudinal beams of the two frame longitudinal beams 3. The front housing space 61 is used to accommodate the reducer 1002 and the drive shaft 102. The clearance space 51 is connected to the front housing space 61, and the rear housing space 62 is used to accommodate the drive motor 1001.

[0265] For example, the motor shaft of the drive motor 1001 is poweredly connected to the reducer 1002, and the reducer 1002 is connected to the drive shaft 102. That is, the drive motor 1001 transmits power to the wheels through the reducer 1002 and the drive shaft 102. Referring to Figures 6 and 8, the front accommodating space 61 is mainly opposite the arched structure 5 along the lateral direction of the vehicle. When the reducer 1002 is set in the front accommodating space 61, the reducer 1002 is poweredly connected to the drive shaft 102, and the motor shaft of the drive motor 1001 is poweredly connected to the reducer 1002. The drive motor 1001 and its controller are set in the rear accommodating space 62, which realizes a reasonable layout and improves the integration of the reducer 1002 and the drive motor 1001, and enables the drive shaft 102 to output power to the left and right wheels of the vehicle along the lateral direction of the vehicle. The controller of the drive motor 1001 can control the speed and torque of the drive motor 1001. The controller of the drive motor 1001 can control the speed of the motor by adjusting the input voltage or current according to system requirements, and control the torque of the motor by adjusting the amplitude, frequency or phase of the input signal.

[0266] In some embodiments, the frame longitudinal beam 3 has a front upper arm mounting portion 401 at the upper front end of the arch structure 5 and a front lower arm mounting portion 411 at the lower front end, with the front lower arm mounting portion 411 located in front of the front upper arm mounting portion 401. The frame longitudinal beam 3 has a rear upper arm mounting portion 421 at the upper rear end and a rear lower arm mounting portion 433 at the lower rear end, with the rear lower arm mounting portion 433 located in front of the rear upper arm mounting portion 421.

[0267] As shown in Figures 11 and 12, a front upper arm can be movably mounted on the front upper arm mounting part 401, and a steering knuckle is mounted on the front upper arm. That is to say, this front upper arm connects the steering knuckle and the frame longitudinal beam 3 of the rear subframe 100, and plays a supporting and connecting role. The steering knuckle is responsible for connecting the wheel and the suspension system, ensuring that the wheel can steer smoothly, and bearing the force transmission between the wheel and the body.

[0268] The front lower arm mounting part 411 of the subframe 100 is movably connected to the front lower arm, and the front lower arm is connected to the steering knuckle. The front lower arm plays the role of connecting the wheel bearing and the suspension body in the automobile suspension system. Although it is small in size, it plays an important role in the vehicle. It works together with shock absorbers, springs and other components to play a key role in the stable support of the vehicle body.

[0269] The subframe 100 also features a rear upper arm mounting section 421, which movably connects to the rear upper arm. The rear upper arm is connected to the steering knuckle via a ball joint. The primary function of the connection between the rear upper arm and the steering knuckle of the subframe 100 is to transmit force and support the vehicle, ensuring stability and handling during driving. The rear lower arm connects to the rear lower arm mounting section 433 of the subframe 100. The connection between the rear lower arm and the steering knuckle serves to support the vehicle body and absorb shocks. It not only supports the vehicle's weight but also, through the cooperation of shock absorbers and springs, buffers vibrations during driving, improving ride comfort.

[0270] The front lower arm mounting portion 411 and the front upper arm mounting portion 401 are staggered along the vehicle's longitudinal direction on the frame longitudinal beam 3, thereby preventing stress concentration at the same position on the arched structure 5 and ensuring more even stress distribution. At the same time, the rear lower arm mounting portion 433 and the rear upper arm mounting portion 421 are also staggered along the vehicle's longitudinal direction on the frame longitudinal beam 3 to avoid interference during movement and to maintain a stable positional layout for the front lower arm, front upper arm, rear upper arm, and rear lower arm, thus improving the vehicle's driving stability.

[0271] In some embodiments, the rear subframe assembly 1000 further includes a rear lower arm mounting bracket 43, which is located at the bottom of the frame longitudinal beam 3. The rear lower arm mounting bracket 43 includes a front-to-back plate 431 and a reinforcing plate 432 located between the two plates 431. The rear lower arm mounting portion 433 is disposed on the two plates 431.

[0272] In practice, the subframe 100 is provided with a front upper arm mounting bracket 40, and a front upper arm mounting part 401 can be provided on the front upper arm mounting bracket 40. The subframe 100 is also provided with a front lower arm mounting bracket 41, and the front lower arm mounting bracket 41 is provided with a front lower arm mounting part 411. The subframe 100 is also provided with a rear upper arm mounting bracket 42, and the rear upper arm mounting bracket 42 is provided with a rear upper arm mounting part 421. It is also provided with a rear lower arm mounting bracket 43, and the rear lower arm mounting bracket 43 is provided with a rear lower arm mounting part 433. By setting the rear lower arm mounting bracket 43 as two plates 431 arranged opposite each other and a reinforcing plate 432 connecting the two plates 431, the strength, durability and stability of the rear lower arm mounting bracket 43 are improved.

[0273] Furthermore, the plate 431 and the reinforcing plate 432 can be welded together with the rear crossbeam 2 and the frame longitudinal beam 3, which improves the integrity of the rear lower arm mounting bracket 43 with the frame longitudinal beam 3 and the rear crossbeam 2, and improves the stability of the rear lower arm. The rear lower arm mounting part 433 can be a mounting hole, that is, the mounting hole is set in the two plates 431, and is connected to the rear lower arm by hinge or pivot through the mounting hole.

[0274] In some embodiments, the lower rear end of the longitudinal beam 3 of the vehicle frame is further provided with a rear suspension toe bar mounting part. The rear suspension toe bar mounting part is located on the rear side of the rear lower arm mounting part 433. The rear suspension toe bar mounting part is used to install one end of the rear suspension toe bar, and the other end of the rear suspension toe bar is adapted to be connected to the steering knuckle.

[0275] In practice, the rear suspension toe bar refers to a component in the rear suspension system used to adjust and control the wheel toe angle, ensuring vehicle stability and handling during driving. The rear suspension toe bar mounting part can be located at the connection between the rear crossbeam 2 and the frame longitudinal beam 3 (not shown in the figure), and it is connected to the steering knuckle. Alternatively, the rear suspension toe bar mounting part can be located at the rear of the rear lower arm mounting bracket 43 to improve the overall structural integration, while also being offset from the rear lower arm mounting part 433 on the rear lower arm mounting bracket 43 to avoid interference with the rear lower arm.

[0276] In some embodiments, the rear crossbeam 2 is further provided with a toe-in adjustment clearance hole 21 that runs through the front-rear direction. The toe-in adjustment clearance hole 21 is used to avoid the adjustment tool for adjusting the rear suspension toe-in rod.

[0277] In practice, the main purpose of adjusting the rear suspension toe-in is to ensure vehicle stability, handling, and uniform tire wear. Adjusting the rear suspension toe-in has a significant impact on vehicle performance. As shown in Figure 12, the toe-in adjustment clearance hole 21 is positioned on the rear lower arm mounting bracket 43 near the rear crossbeam 2. This clearance hole facilitates easy adjustment of the rear suspension toe-in, offering high flexibility. A toe-in wrench is typically used for adjusting toe-in, usually for manually adjusting the wheel's toe-in value.

[0278] In some embodiments, the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32. Both the inner plate portion 31 and the outer plate portion 32 are constructed as grooves. The inner plate portion 31 and the outer plate portion 32 are fastened together and pressed together. A portion of the inner plate portion 31 and a portion of the outer plate portion 32 together form an arched structure 5.

[0279] In practice, the inner plate 31 and the outer plate 32 can be stamped together to improve the overall integrity of the frame longitudinal beam 3, which is suitable for parts with complex shapes. Stamping can manufacture complex parts with thin walls, light weight, high rigidity and high surface quality that are difficult to achieve by other methods, and is suitable for workpieces of various shapes and sizes. Furthermore, both the inner plate 31 and the outer plate 32 are constructed as grooves. After the grooved inner plate 31 and the outer plate 32 are stamped together, the interior of the frame longitudinal beam 3 becomes a hollow structure, which reduces the weight of the frame longitudinal beam 3 and achieves the effect of lightweighting.

[0280] Additionally, it should be noted that rubber sleeves 1051 are provided at both the front body mounting section 34 and the rear body mounting section 35. The upper end of the rubber sleeve 1051, which is exposed outside the frame longitudinal beam 3, extends radially and is welded to the inner plate section 31 and the outer plate section 32 of the frame longitudinal beam 3. This improves the connection reliability of the rubber sleeve 1051 and ensures the integrity of the rubber sleeve 1051 and the frame longitudinal beam 3. The rubber sleeve 1051 connects the subframe 100 and the body, playing a role in buffering and shock absorption, reducing fatigue damage caused by frequent vibrations. The rubber sleeve 1051 can effectively suppress wheel vibration, improve the comfort of passengers inside the vehicle, and reduce the transmission of noise and vibration to the body, thereby improving the vehicle's NVH performance, which includes noise, vibration, and acoustic roughness.

[0281] In some embodiments, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is L6, and satisfies: 125mm≤L6≤145mm; and / or, the height of the arch structure 5 along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm.

[0282] Referring to Figure 7, in practice, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 can be set to 136.4 mm. The smaller the relative height, the simpler the structure, the lighter the weight, and the higher the load transfer efficiency. In other words, the relative height should not be too high, but the height difference design can meet the requirements of designing an arched structure 5. The arched structure 5 meets the motion profile of the drive shaft 102, and the design of the arched structure 5 can increase the strength of the frame longitudinal beam 3. The height of the arched structure 5 along the vertical direction of the vehicle is the cross-sectional height of the arched structure 5. For example, if the cross-sectional height of the arched structure 5 is 74.4 mm, the cross-sectional height affects the entire rear sub-mode, strength, and durability performance. By limiting the cross-sectional height, materials can be saved while ensuring the rear sub-mode, strength, and durability performance, so as to achieve a lightweight design.

[0283] Additionally, it should be noted that the height difference between the highest point of the bottom of the arched structure 5 and the middle section is L7, and L7 can be designed to be 82mm. This height difference is related to the positions of the rear lower arm, the rear suspension toe bar, and the rear upper arm at the mounting points of the frame longitudinal beam 3, as well as the height design of the rear end of the frame longitudinal beam 3 and the overlapping position of the rear crossbeam 2 and the arched structure 5. This allows for the use of a relatively simple frame longitudinal beam 3 structure while installing various structures, making it easier to set the above mounting points and positions, and meeting dynamic performance requirements.

[0284] In some embodiments, the cross-sectional height of the frame longitudinal beam 3 at the arch structure 5 is less than the cross-sectional height of the rear side of the arch structure 5.

[0285] Specifically, the middle section height of arch structure 5 is L9, which is 106.7 mm, and the rear section height is L8, which is 83 mm. Arch structure 5 exhibits relatively small bending moments under vertical loads, resulting in superior performance under such loads. Furthermore, the smooth inner contour of arch structure 5 allows for adjustments to the arch curvature to meet various application requirements, and its layout is more convenient than that of circular structures. Since arch structure 5 primarily bears compressive stress, materials with good compressive strength are suitable. The middle section height of arch structure 5 is smaller than that of its rear section, allowing for enhanced strength through structural design, thus reducing the amount of material used. Additionally, the higher rear section height of arch structure 5 meets strength requirements.

[0286] In some embodiments, one end of the rear crossbeam 2 is also provided with a clearance notch 22, which is adapted to pass through in the front-rear direction and is used to avoid the exhaust pipe of the engine.

[0287] As shown in Figure 10, the cross-sectional height of the rear crossbeam 2 above the clearance notch 22 is 170.2 mm, while the cross-sectional height of the rear crossbeam 2 outside the clearance notch 22 is 233.5 mm. The exhaust pipe of the subframe 100 is commonly referred to as the exhaust pipe or tailpipe. The exhaust pipe connects the engine at the front of the vehicle and the muffler at the rear, and is used to exhaust the exhaust gases produced by the engine. This design increases the integration between the exhaust pipe and the rear crossbeam 2, saving space. In addition, the clearance notch 22 can be designed with an arc-shaped structure, which better fits the outer perimeter of the exhaust pipe and reduces wear on the exhaust pipe.

[0288] In some embodiments, the rear crossbeam 2 is integrally formed. The integrally formed rear crossbeam 2 of the subframe 100 can improve the body strength and rigidity, reduce weight, improve overall vehicle comfort, and improve lateral and longitudinal rigidity. The width of the rear crossbeam 2 along the front-rear direction of the vehicle is D4, which is 69mm, and the height is 233.5mm.

[0289] Additionally, it should be noted that the rear luggage compartment floor is directly above the longitudinal beam 3 of the subframe 100, and the lower plate of the rear longitudinal beam is above the side. Furthermore, there is a distance between the area between the front body mounting part 34 and the rear body mounting part 35 of the longitudinal beam 3 and the lower plate of the rear longitudinal beam. The subframe 100 and the body are usually connected by a soft connection, which reduces the impact on the body when the subframe 100 vibrates.

[0290] This application also proposes a vehicle including the aforementioned rear subframe assembly 1000. The arched structure 5 of the longitudinal beam 3 of the rear subframe assembly 1000 can improve strength, and the drive motor 1001 is installed in the electric drive housing space 6. The drive shaft 102 extends to the clearance space 51 formed by the arched structure 5. This design has high integration and saves space, saving space at the rear bottom of the vehicle, reducing material costs, and thus facilitating low-cost and lightweight design of the vehicle.

[0291] The subframe 100 according to an embodiment of this application is described below with reference to Figures 1-3 and 8. The rear crossbeam 2 of the subframe 100 is provided with a steering gear mounting part 25 and a steering gear clearance hole 20, so that the rear crossbeam 2 has the function of connecting the steering gear 103. While ensuring the strength of the rear crossbeam 2, the integration is high and the space in the front and rear directions of the vehicle is saved.

[0292] As shown in Figures 1-3 and 8, a subframe 100 according to one embodiment of this application includes: a front crossbeam 1, a rear crossbeam 2, and two frame longitudinal beams 3.

[0293] The front crossbeam 1 and the rear crossbeam 2 are spaced apart along the longitudinal direction of the vehicle; two frame longitudinal beams 3 are spaced apart along the transverse direction of the vehicle and are connected between the front crossbeam 1 and the rear crossbeam 2 to jointly define the electric drive housing space 6; a steering gear mounting part 25 is provided on the rear side of the rear crossbeam 2, and the rear crossbeam 2 forms a rearwardly open steering gear clearance hole 20. The steering gear mounting part 25 is used to install the steering gear 103, and the steering gear clearance hole 20 is used to clear at least a part of the steering gear 103.

[0294] In practice, the subframe 100 is a frame structure formed by the front crossbeam 1, the rear crossbeam 2, and two frame longitudinal beams 3. The subframe 100 is installed as a whole under the rear of the vehicle. At least part of the two frame longitudinal beams 3 of the subframe 100 are arched structures 5. As in the embodiment of this application, an arched structure 5 can be partially set at the front of the frame longitudinal beam 3. The frame longitudinal beam 3 with the arched structure 5 has good stability and good buffering capacity, and can effectively absorb and disperse impact force. The arched structure 5 can evenly transfer the gravity load to different positions, so that the entire structure can withstand greater force and improve strength.

[0295] In addition, an electric drive housing space 6 is formed between the two frame longitudinal beams 3, the front crossbeam 1, and the rear crossbeam 2. The electric drive housing space 6 can accommodate the electric drive assembly 101. The electric drive assembly 101 includes a reducer 1002, a drive motor 1001, and a controller for the drive motor 1001. The drive motor 1001 is powered by the drive shaft 102 through the reducer 1002. The drive shaft 102 extends into the clearance space 51 formed at the bottom of the arched structure 5, which improves the overall strength of the subframe 100 and also improves the integration of the electric drive assembly 101 and the subframe 100.

[0296] Furthermore, in this embodiment of the application, while ensuring the strength of the rear crossbeam 2, a steering gear clearance hole 20 is provided at the rear crossbeam 2. The steering gear clearance hole 20 can be a blind hole recessed from the rear side of the rear crossbeam 2 toward the front side, or it can be a through hole extending through the rear-rear direction of the rear crossbeam 2. The steering gear 103 is installed at the rear crossbeam 2. If the rear crossbeam 2 is provided with a steering gear mounting part 25, the steering gear mounting part 25 is constructed as multiple hollow studs. The steering gear 103 is first connected by bolts, and then the bolts are inserted into the studs and threadedly connected to the studs to realize the installation between the steering gear 103 and the rear crossbeam 2.

[0297] Specifically, the steering gear 103 is mounted on the rear side of the rear crossbeam 2 of the subframe 100 and is at least partially located at the steering gear clearance hole 20 of the rear crossbeam 2, so that the steering gear 103 and the rear crossbeam 2 partially overlap in the longitudinal direction of the vehicle, thereby reducing the longitudinal dimension and improving the integration. In addition, the steering gear 103 makes the rear wheels more flexible when turning, thereby improving the handling and stability of the vehicle. Moreover, mounting the steering gear 103 on the rear crossbeam 2 of the subframe 100 can optimize the spatial layout of the vehicle. The steering gear 103 will not take up too much rear wheel space, thereby maintaining the space utilization rate of the vehicle interior and trunk.

[0298] In some embodiments, at least a portion of the steering gear 103 is located on the rear side of the rear crossbeam 2, and the rear sidewall of the rear crossbeam 2 is formed with a clearance groove 24. The clearance groove 24 communicates laterally with the steering gear clearance hole 20 along the vehicle. The steering gear 103 is provided with a steering gear fork 1031, and the clearance groove 24 is used to avoid the steering gear fork 1031.

[0299] In other words, when the clearance groove 24 and the steering gear clearance hole 20 are connected, both the clearance groove 24 and the steering gear clearance hole 20 can be used to accommodate partial structures of the steering gear 103, such as the steering fork 1031 of the steering gear 103 extending laterally along the vehicle. The main function of the steering fork 1031 is to connect the ball joint and tie rod of the vehicle. The steering fork 1031 is responsible for transmitting the steering torque transmitted from the front to the wheel hub, causing the wheel to deflect. Thus, by setting the clearance groove 24, which can extend laterally along the rear crossbeam 2, clearance is achieved for the steering fork 1031, and the integration of the rear crossbeam 2 and the steering gear 103 is improved. At the same time, the part of the steering fork 1031 located within the clearance groove 24 is equivalent to increasing the strength of the rear crossbeam 2 and improving the anti-collision effect of the rear crossbeam 2.

[0300] In some embodiments, there are two clearance slots 24, which are connected to both sides of the steering gear clearance hole 20 along the lateral direction of the vehicle. Both clearance slots 24 are constructed as arc-shaped slots, and the radii of the two clearance slots 24 are set as R1 and R2 respectively, and satisfy: 30mm≤R1≤40mm, 40mm≤R1≤50mm.

[0301] Referring to Figure 1, two clearance grooves 24 are distributed on both sides of the steering gear clearance hole 20 along the transverse direction of the rear crossbeam 2. That is, the steering gear fork 1031 extends along the transverse direction of the rear crossbeam 2, and is partially located at the two clearance grooves 24 and the steering gear clearance hole 20, thereby achieving a better integration effect between the rear steering gear 103 and the rear crossbeam 2. At the same time, the radius of the clearance groove 24 on the left side of the steering gear clearance hole 20 is 34.3mm, but it can also be 36mm, 37mm, etc., and the radius of the clearance groove 24 on the right side of the steering gear clearance hole 20 is 47.062mm, but it can also be 47.5mm, 48mm, etc., thus realizing that the size of the clearance groove 24 can be adapted to different outer circumference sizes of the steering gear fork 1031.

[0302] Furthermore, the clearance groove 24 can be located essentially at the center of the steering gear clearance hole 20 in the height direction, that is, the steering gear fork 1031 is also located at the center of the steering gear clearance hole 20 in the height direction, improving the stability and uniformity of the force. Moreover, in the design, the steering gear clearance hole 20 is also set at the center of the rear crossbeam 2 along the vehicle's transverse direction to ensure uniform force distribution.

[0303] In addition, since the two longitudinal beams 3 of the frame are respectively provided with rear electric drive mounting points 33 and the front crossbeam 1 is provided with a front electric drive mounting point 11, the entire electric drive assembly 101 is connected to the two rear electric drive mounting points 33 and the front electric drive mounting point 11. The electric drive assembly 101 is located on the front side of the rear crossbeam 2 and there is a gap between it and the rear crossbeam 2. The rear side of the rear crossbeam 2 is connected to the steering gear 103, thereby improving the uniformity of force distribution on the entire subframe 100.

[0304] In some embodiments, the steering gear mounting portions 25 are provided in multiples, with at least some of the steering gear mounting portions 25 spaced apart on both sides of the two clearance slots 24 in the height direction, and at least some of the steering gear mounting portions 25 spaced apart on both sides of the steering gear clearance hole 20 in the lateral direction.

[0305] Referring to Figure 1, the steering gear mounting part 25 is a hollow stud, and four hollow studs can be provided. The four studs are distributed at four different positions of the steering gear clearance hole 20, such as one stud on the upper left and one on the upper right of the steering gear clearance hole 20, and one stud on the lower left and one on the lower right of the steering gear clearance hole 20. This ensures that when the steering gear 103 is installed on the rear crossbeam 2, the steering gear 103 is subjected to uniform force at least around the steering gear clearance hole 20, thereby ensuring the stability of the steering gear 103.

[0306] In some embodiments, the distance between the outer wall of the steering gear 103 extending into the steering gear clearance hole 20 and the inner wall of the steering gear clearance hole 20 is set as A, and satisfies: 4mm≤A≤6mm.

[0307] In practice, the steering gear clearance hole 20 forms a cavity structure at the rear crossbeam 2. The shape of this cavity structure matches the dimensions of the rear steering structure, such as maintaining a gap of about 5mm with the boundary of the steering gear 103. By setting the gap, long-term vibration and collision between the outside of the steering gear 103 and the rear crossbeam 2 during vehicle driving vibration can be avoided, resulting in wear and tear. Furthermore, when disassembling the steering gear 103, the gap between the steering gear 103 and the rear crossbeam 2 provides space for disassembly, making disassembly easy.

[0308] In some embodiments, referring to FIG3, the width of the steering gear clearance hole 20 along the vehicle lateral direction is set as D1, and satisfies: 270mm≤D1≤280mm; and / or, the maximum distance between the upper wall and the lower wall of the steering gear clearance hole 20 is set as D2, and satisfies: 140mm≤D2≤150mm; and / or, the minimum distance between the upper wall and the lower wall of the steering gear clearance hole 20 is set as D3, and satisfies: 110mm≤D3≤130mm.

[0309] For example, the width of the steering gear clearance hole 20 along the vehicle's lateral direction can be set to 275.5mm, or it could be 276mm, 277mm, etc. By setting the width of the steering gear clearance hole 20, the protruding structure of the steering gear 103 can be more fully inserted into the steering gear clearance hole 20, thereby achieving a better space-saving effect. The maximum distance between the upper and lower walls of the steering gear clearance hole 20 can be set to 145.5mm. By limiting the maximum distance between the upper and lower walls of the steering gear clearance hole 20, it can fit the outer contour of the protruding part of the steering gear 103. The minimum distance between the upper and lower walls of the steering gear clearance hole 20 can be set to 117.122mm, that is, the steering gear clearance hole 20 is an irregular hole, thus ensuring that the outer contour of the steering gear can fit the steering gear clearance hole 20, while also preventing the steering gear clearance hole 20 from being too large and affecting the strength of the rear crossbeam 2. In other words, it satisfies the clearance requirement of the steering gear 103 while ensuring the strength of the rear crossbeam 2.

[0310] In some embodiments, the width of the rear crossbeam 2 along the front-rear direction of the vehicle is D4, and satisfies: 60mm≤D4≤80mm;

[0311] And / or, the height of the rear crossbeam 2 along the vehicle height direction is D5, and satisfies: 220mm≤D5≤240mm.

[0312] In practice, referring to Figures 2 and 3, the rear crossbeam 2 has a width of 69mm and a height of 233.5mm. By limiting the height of the rear crossbeam 2, combined with the aforementioned limitation on the size of the steering gear clearance hole 20, a suitable distance is maintained between the upper wall of the steering gear clearance hole 20 and the top of the rear crossbeam 2, thus ensuring the strength of the rear crossbeam 2. Furthermore, by limiting the width of the rear crossbeam 2—meaning that its width along the vehicle's longitudinal direction should neither be too large nor too small—both lightweight requirements are met while maintaining the strength of the rear crossbeam 2.

[0313] In some embodiments, the rear crossbeam 2 is further provided with a clearance notch 22 on one side of the steering gear clearance hole 20 in the lateral direction. The clearance notch 22 is adapted to pass through in the front-rear direction and is used to clear the exhaust pipe of the engine.

[0314] As shown in Figure 3, the cross-sectional height of the rear crossbeam 2 above the clearance notch 22 is D6, which is 170.2 mm. The exhaust pipe of the subframe 100 is commonly referred to as the exhaust pipe or tailpipe. The exhaust pipe connects the engine at the front of the vehicle and the muffler at the rear, and is used to exhaust the exhaust gases produced by the engine. This design increases the integration between the exhaust pipe and the rear crossbeam 2, saving space. In addition, the clearance notch 22 can be designed with an arc-shaped structure, which better fits the outer perimeter of the exhaust pipe and reduces wear on the exhaust pipe.

[0315] In some embodiments, the rear crossbeam 2 is integrally formed; an integrally formed rear crossbeam 2 of the subframe 100 can improve vehicle body strength and rigidity, reduce weight, improve overall vehicle comfort, and enhance lateral and longitudinal rigidity. For example, the integrally formed rear crossbeam 2 has one end connected to the inner side of the frame longitudinal beam 3 along the transverse direction of the vehicle, and another part connected to the bottom of the frame longitudinal beam 3, thereby improving the reliability and stability of the connection between the frame longitudinal beam 3 and the rear crossbeam 2.

[0316] It should also be noted that, as shown in Figure 1, the rear side of the rear crossbeam 2 is also provided with a toe adjustment clearance hole 21 that runs through the front and rear directions. The toe adjustment clearance hole 21 is used to avoid the adjustment tool of the rear suspension toe rod.

[0317] In practice, the rear suspension toe-in rod can be connected between the steering gear 103 and the steering knuckle. The main purpose of adjusting the rear suspension toe-in rod is to ensure the vehicle's driving stability, handling, and even tire wear. The adjustment of the rear suspension toe-in rod has a significant impact on the vehicle's performance. The toe-in adjustment clearance hole 21 allows for easy access to the adjustment tool to adjust the rear suspension toe-in rod, providing high flexibility in adjustment. The adjustment tool can typically be a toe-in wrench, a tool specifically designed for adjusting toe-in, usually used for manually adjusting the wheel's toe-in value.

[0318] It should also be noted that the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32. Both the inner plate portion 31 and the outer plate portion 32 are constructed in a groove shape. The inner plate portion 31 and the outer plate portion 32 are fastened together and pressed together. A part of the inner plate portion 31 and a part of the outer plate portion 32 together form an arched structure 5.

[0319] In practice, the inner plate 31 and the outer plate 32 can be stamped together to improve the overall integrity of the frame longitudinal beam 3, which is suitable for parts with complex shapes. Stamping can manufacture complex parts with thin walls, light weight, high rigidity and high surface quality that are difficult to achieve by other methods, and is suitable for workpieces of various shapes and sizes. Furthermore, both the inner plate 31 and the outer plate 32 are constructed as grooves. After the grooved inner plate 31 and the outer plate 32 are stamped together, the interior of the frame longitudinal beam 3 becomes a hollow structure, which reduces the weight of the frame longitudinal beam 3 and achieves the effect of lightweighting.

[0320] This application also proposes a vehicle including the subframe 100 described above, with the rear crossbeam 2 integrally formed. The rear crossbeam 2 of the subframe 100 is provided with a steering gear mounting part 25 and a steering gear clearance hole 20, so that the rear crossbeam 2 has the function of connecting the steering gear 103. While ensuring the strength of the rear crossbeam 2, the integration is high and the space is saved, thereby improving the integration and overall strength of the subframe 100.

[0321] The subframe 100 according to an embodiment of this application is described below with reference to Figures 15-18. The electric drive housing space 6 is defined by the front crossbeam 1, the rear crossbeam 2 and the two frame longitudinal beams 3, which can realize the installation of the electric drive assembly. The rear lower arm mounting bracket 43 is provided and connected to the bottom of the frame longitudinal beam 3 and the bottom of the rear crossbeam 2 respectively. This increases the connection area between the rear lower arm mounting bracket 43 and the subframe 100, thereby enhancing the connection strength between the two and improving the connection reliability between the rear lower control arm and the wheel and the subframe 100. This can reduce the vibration generated during vehicle operation, so as to make the vehicle run stably and improve the ride comfort.

[0322] As shown in Figures 15-18, a subframe 100 according to one embodiment of this application includes: a front crossbeam 1, a rear crossbeam 2, a frame longitudinal beam 3, and a rear lower arm mounting bracket 43.

[0323] The front crossbeam 1 and the rear crossbeam 2 are spaced apart along the longitudinal direction of the vehicle, and two frame longitudinal beams 3 are spaced apart along the transverse direction of the vehicle and are connected between the front crossbeam 1 and the rear crossbeam 2 to jointly define the electric drive accommodation space 6.

[0324] Specifically, the front crossbeam 1 and the rear crossbeam 2 both extend laterally along the vehicle to transmit and dissipate lateral forces. The two frame longitudinal beams 3 extend longitudinally along the vehicle to transmit and dissipate longitudinal forces. The front crossbeam 1 and the rear crossbeam 2 are spaced apart along the front-rear direction of the vehicle, and the two frame longitudinal beams 3 are spaced apart along the lateral direction of the vehicle. The two frame longitudinal beams 3 are connected between the front crossbeam 1 and the rear crossbeam 2. In this way, the front crossbeam 1, the rear crossbeam 2, and the two frame longitudinal beams 3 can jointly define the electric drive housing space 6 for the installation of the electric drive assembly.

[0325] Furthermore, the front ends of the two frame longitudinal beams 3 are supported and connected by the front crossbeam 1, which can improve the structural stability of the front end of the frame longitudinal beams 3. The rear ends of the two frame longitudinal beams 3 are supported and connected by the rear crossbeam 2, which can improve the structural stability of the rear end of the frame longitudinal beams 3. This improves the structural stability of the subframe 100, thus providing reliable installation conditions for the electric drive assembly and facilitating the reliable installation of the suspension system structure, thereby improving the stability of vehicle operation.

[0326] The subframe 100 is a crucial chassis component of the vehicle. Located at the rear of the vehicle, it securely anchors internal and rear components to the chassis, ensuring stability during vehicle operation. Furthermore, in the event of a collision, the external force is transmitted and dispersed along the two longitudinal beams 3, the front crossbeam 1, and the rear crossbeam 2 of the subframe 100, reducing deformation and maintaining vehicle stability and safety.

[0327] Furthermore, the two transverse ends of the front crossbeam 1 are welded to the front ends of the two frame longitudinal beams 3, and the two transverse ends of the rear crossbeam 2 are welded to the rear ends of the two frame longitudinal beams 3. This results in high welding strength and improves the overall strength of the subframe 100. The two transverse ends of the front crossbeam 1 and the rear crossbeam 2 can be connected to the two frame longitudinal beams 3 respectively using bolts or other connecting components.

[0328] The rear lower arm mounting bracket 43 is connected to the bottom of the longitudinal beam 3 and the bottom of the rear cross beam 2 of the vehicle frame, and a hollow reinforcing cavity 611 is formed inside the rear lower arm mounting bracket 43.

[0329] Specifically, as shown in Figures 15 and 16, the rear lower arm mounting bracket 43 is disposed at the bottom of the subframe 100. At least a portion of the rear lower arm mounting bracket 43 can be connected to the bottom of the frame longitudinal beam 3, and another portion of the rear lower arm mounting bracket 43 can be connected to the bottom of the rear crossbeam 2. This allows the rear lower arm mounting bracket 43 to be connected to both the frame longitudinal beam 3 and the rear crossbeam 2, increasing the connection area of ​​the rear lower arm mounting bracket 43 and improving the connection strength between the rear lower arm mounting bracket 43 and the subframe 100. The rear lower arm mounting bracket 43 can be connected to the rear area of ​​the frame longitudinal beam 3 or the rear crossbeam 2, or it can be connected to the junction of the frame longitudinal beam 3 and the rear crossbeam 2.

[0330] In this way, one end of the rear lower control arm can be connected to the lower end of the subframe 100 via the rear lower arm mounting bracket 43, and the other end of the rear lower control arm can be connected to the wheel, thus realizing the connection between the wheel and the subframe 100. The force transmission between the wheel and the subframe 100 can be achieved through the rear lower control arm to ensure stable wheel operation. Furthermore, the rear lower arm mounting bracket 43 can be provided with a rear connection hole for mounting the rear lower control arm.

[0331] The rear lower arm mounting bracket 43 can be connected to the rear crossbeam 2 and the frame longitudinal beam 3 by welding, so that the rear lower arm mounting bracket 43 can be connected to the rear crossbeam 2 and the frame longitudinal beam 3 as one unit, thereby improving the connection reliability between the rear lower control arm and the subframe 100.

[0332] Furthermore, a hollow reinforcing cavity 611 is formed within the rear lower arm mounting bracket 43, which enhances the strength of the rear lower arm mounting bracket 43 and improves its stability and resistance to deformation. The hollow reinforcing cavity 611 can improve noise and vibration; its internal cavity structure can absorb and disperse vibration energy, reducing the transmission of vibration into the vehicle interior, thereby improving ride comfort. Additionally, in the event of a collision, the hollow reinforcing cavity 611 absorbs a large amount of energy, protecting passenger safety.

[0333] Among them, the hollow reinforcing cavity 611 is a hollow structure. Compared with a solid structure, it can reduce the weight of the rear lower arm mounting bracket 43 without reducing the structural strength of the rear lower arm mounting bracket 43, so as to meet the requirements of lightweight design.

[0334] According to the embodiments of this application, the subframe 100 defines an electric drive housing space 6 through a front crossbeam 1, a rear crossbeam 2, and two frame longitudinal beams 3, which can realize the installation of the electric drive assembly. The rear lower arm mounting bracket 43 is connected to the bottom of the frame longitudinal beam 3 and the bottom of the rear crossbeam 2, respectively, which can increase the connection area between the rear lower arm mounting bracket 43 and the subframe 100, thereby enhancing the connection strength between the two and improving the connection reliability between the rear lower control arm and the wheel and the subframe 100. This can reduce the vibration generated during vehicle operation, so as to make the vehicle run stably and improve the ride comfort.

[0335] In some embodiments, the rear lower arm mounting bracket 43 is configured to extend outward from rear to front, and at least a portion of the rear lower arm mounting bracket 43 is located at the bottom of the electric drive housing 6.

[0336] Specifically, as shown in Figure 17, the rear lower arm mounting bracket 43 is connected to the rear crossbeam 2 and the frame longitudinal beam 3. The rear lower arm mounting bracket 43 does not extend in the front-rear or left-right direction; instead, it extends outwards from rear to front. This allows the rear lower arm mounting bracket 43 to support the connection between the rear crossbeam 2 and the frame longitudinal beam 3, increasing the connection range between the rear lower arm mounting bracket 43 and the rear crossbeam 2 and the frame longitudinal beam 3, thereby improving the connection strength between the rear lower arm mounting bracket 43, the rear crossbeam 2, and the frame longitudinal beam 3. At least a portion of the rear lower arm mounting bracket 43 is located at the bottom of the electric drive housing 6, preventing this portion of the rear lower arm mounting bracket 43 from interfering with the electric drive assembly. This facilitates the layout and installation of the electric drive assembly and also provides shelter from the bottom of the electric drive housing 6.

[0337] Therefore, by setting the rear lower arm mounting bracket 43 to extend in an inclined direction, the rear crossbeam 2 and the frame longitudinal beam 3 can transmit force through the rear lower arm mounting bracket 43 in an inclined direction, adding a force transmission path between the rear crossbeam 2 and the frame longitudinal beam 3, which is conducive to the rapid dissipation of force and can improve the stability during driving.

[0338] In some embodiments, the hollow reinforcing cavity 611 is configured to extend obliquely from rear to front, with the rear end of the hollow reinforcing cavity 611 opening toward the rear crossbeam 2 and the front end of the hollow reinforcing cavity 611 opening toward the frame longitudinal beam 3.

[0339] Specifically, the rear lower arm mounting bracket 43 can be connected to the longitudinal beam 3 and the rear cross beam 2 of the frame by stamping and welding. A hollow reinforcing cavity 611 is formed inside the rear lower arm mounting bracket 43. The extension direction of the hollow reinforcing cavity 611 is the same as the extension direction of the rear lower arm mounting bracket 43. Both are constructed to extend outward from the rear to the front, which allows the hollow reinforcing cavity 611 to absorb and disperse vibration energy in the inclined direction. Compared with a straight setting, it can increase the absorption and dispersion path of vibration energy, effectively reduce the transmission of vibration to the vehicle interior, and thus improve ride comfort.

[0340] Furthermore, the volume of the hollow reinforcing cavity 611 gradually increases from rear to front and outward, which makes the cavity shape of the hollow reinforcing cavity 611 orderly and stable, which is conducive to the stable transmission of vibration energy. The rear end of the hollow reinforcing cavity 611 opens towards the rear crossbeam 2, allowing heat inside the hollow reinforcing cavity 611 to be transferred rearward through the opening, and the front end of the hollow reinforcing cavity 611 opens towards the frame longitudinal beam 3, allowing heat inside the hollow reinforcing cavity 611 to be transferred forward through the opening, thus reducing heat accumulation.

[0341] In some embodiments, there are two rear lower arm mounting brackets 43, and the two rear lower arm mounting brackets 43 are symmetrically distributed at the bottom of both ends of the rear crossbeam 2.

[0342] Specifically, as shown in Figures 15 and 16, two rear lower arm mounting brackets 43 are respectively connected to both ends of the rear crossbeam 2 and are symmetrically distributed in the transverse direction of the vehicle. The transverse ends of the rear crossbeam 2 are welded to the rear ends of the frame longitudinal beams 3. The symmetrically distributed rear lower arm mounting brackets 43 connect the transverse ends of the rear crossbeam 2 to the frame longitudinal beams 3, enhancing the connection strength between the rear crossbeam 2 and the two frame longitudinal beams 3. During force transmission, the transverse force at the rear crossbeam 2 can be transmitted transversely to the frame longitudinal beams 3, and can also be transmitted obliquely from the two rear lower arm mounting brackets 43 to the two frame longitudinal beams 3, increasing the force transmission paths between the rear crossbeam 2 and the two frame longitudinal beams 3, thus facilitating the rapid diffusion of vibration energy.

[0343] Furthermore, the rear lower arm mounting bracket 43 is used to install the rear lower control arm. By symmetrically arranging the two rear lower arm mounting brackets 43, the rear lower control arms can be symmetrically installed at the bottom of the lateral ends of the rear crossbeam 2, making the subframe 100 structurally symmetrical. The subframe 100 is connected to the left and right wheels through the two symmetrical rear lower control arms, which makes the connection stability between the subframe 100 and the left and right wheels better and helps to improve the driving comfort of the whole vehicle.

[0344] As shown in Figure 17, the two rear lower arm mounting brackets 43 are also connected to front toe rod mounting brackets 434. The front toe rod mounting brackets 434 are used to mount the front toe rod, which connects the left and right rear wheels of the vehicle, allowing the left and right rear wheels to rotate synchronously during driving. This synchronicity helps reduce tire wear and improves vehicle stability. The front toe rod mounting brackets 434 and rear lower arm mounting brackets 43 are configured in the same way, both extending outwards from rear to front. The front toe rod mounting brackets 434 are welded to the rear lower arm mounting brackets 43 and also welded to the rear crossbeam 2 or the frame longitudinal beam 3, which improves the connection strength of the front toe rod mounting brackets 434. The front toe rod mounting brackets 434 are also equipped with connection holes for mounting the front toe rod.

[0345] In some embodiments, the subframe 100 further includes a front upper arm mounting bracket 40 and / or a front lower arm mounting bracket 41. The front upper arm mounting bracket 40 is mounted on the upper side of the end of the front crossbeam 1, and the front lower arm mounting bracket 41 is mounted on the lower side of the end of the front crossbeam 1. The front upper arm mounting bracket 40 and / or the front lower arm mounting bracket 41 are connected to the front end of the frame longitudinal beam 3.

[0346] In other words, the front upper arm mounting bracket 40 and / or the front lower arm mounting bracket 41 can be respectively set on the upper and lower sides of the front end of the front crossbeam 1, or the front upper arm mounting bracket 40 and / or the front lower arm mounting bracket 41 can be respectively set on the upper and lower sides of the front end of the frame longitudinal beam 3, or one of the front upper arm mounting bracket 40 and / or the front lower arm mounting bracket 41 can be set on the front crossbeam 1 and the other on the frame longitudinal beam 3. The setting methods are diverse and can be flexibly selected.

[0347] Specifically, the front upper arm mounting bracket 40 is used to mount the front upper control arm, and the front lower arm mounting bracket 41 is used to mount the front lower control arm. One end of the front upper control arm can be connected to the upper end of the subframe 100 through the front upper arm mounting bracket 40, and the other end of the front upper control arm can be connected to the wheel. Similarly, one end of the front lower control arm can be connected to the lower end of the subframe 100 through the front lower arm mounting bracket 41, and the other end of the front lower control arm can be connected to the wheel. This achieves the connection between the wheel and the subframe 100, and the force transmission between the wheel and the subframe 100 can be achieved through the front upper control arm and the front lower control arm to ensure stable wheel operation.

[0348] The upper front arm mounting bracket 40 and the lower front arm mounting bracket 41 can be connected to the front crossbeam 1 or the frame longitudinal beam 3 by welding. Furthermore, the upper front arm mounting bracket 40 and the lower front arm mounting bracket 41 can each be provided with front connection holes for mounting the upper front control arm and the lower front control arm, respectively.

[0349] In some embodiments, the subframe 100 further includes a rear upper arm mounting bracket 42, which is mounted on the upper side of the end of the rear crossbeam 2. The rear upper arm mounting bracket 42 can also be mounted on the upper side of the end of the frame longitudinal beam 3, and can also be mounted on the upper side of the connection between the frame longitudinal beam 3 and the rear crossbeam 2. The mounting methods are diverse and can be flexibly selected.

[0350] Specifically, the upper rear arm mounting bracket 42 is used to mount the upper rear control arm. One end of the upper rear control arm can be connected to the upper end of the subframe 100 through the upper rear arm mounting bracket 42, and the other end of the upper rear control arm can be connected to the wheel. Similarly, one end of the lower rear control arm can be connected to the lower end of the subframe 100 through the lower rear arm mounting bracket 43, and the other end of the lower rear control arm can be connected to the wheel. This enables the connection between the wheel and the subframe 100. Force transmission between the wheel and the subframe 100 can be achieved through the upper rear control arm and the lower rear control arm to ensure stable wheel operation.

[0351] The rear upper arm mounting bracket 42 can be connected to the rear crossbeam 2 and / or the frame longitudinal beam 3 by welding. Furthermore, the rear upper arm mounting bracket 42 may have rear connection holes for mounting the rear upper control arm.

[0352] In some embodiments, the front crossbeam 1 is a one-piece molded beam. The front crossbeam 1 can be integrally formed by stamping, resulting in high overall structural strength and a more uniform overall structure, reducing the likelihood of localized deformation or cracking. This allows the front crossbeam 1 to maintain good stability and durability under heavy loads or other external forces. Furthermore, the one-piece molding reduces the need for additional connecting structures within the front crossbeam 1, simplifying installation and lowering costs.

[0353] In other embodiments, the rear crossbeam 2 is a one-piece molded beam, similar to the front crossbeam 1. The rear crossbeam 2 can be integrally molded by stamping, resulting in high overall structural strength. Furthermore, the integrally molded rear crossbeam 2 has a more uniform overall structure, making it less prone to localized deformation or cracking. This allows the rear crossbeam 2 to maintain good stability and durability under heavy loads or other external forces. The one-piece molding also reduces the need for additional connecting structures within the rear crossbeam 2, simplifying the installation process and lowering installation costs.

[0354] In other embodiments, at least a portion of the rear crossbeam 2 is configured to gradually decrease in thickness in the vertical direction of the vehicle towards the ends.

[0355] Specifically, as shown in Figure 18, the vertical thickness of at least a portion of the middle of the rear crossbeam 2 can be set to be relatively large, which can improve the structural strength of the middle region of the rear crossbeam 2, thereby improving the overall load-bearing capacity and bending resistance of the rear crossbeam 2. Furthermore, other structures can be installed and laid out in the middle position of the rear crossbeam 2, thus improving the installation strength of these structures on the rear crossbeam 2. Additionally, the vertical thickness of at least a portion of the left end of the rear crossbeam 2 gradually decreases towards the left end, and the vertical thickness of at least a portion of the right end of the rear crossbeam 2 gradually decreases towards the right end. That is, the vertical thickness of the left and right ends of the rear crossbeam 2 is relatively small, which can reduce its vertical space occupation, avoid interference with other structures, and play a role in avoidance. Moreover, the structure of the rear crossbeam 2 can be symmetrically distributed along the transverse direction, facilitating the processing and forming of the rear crossbeam 2.

[0356] Furthermore, the above-mentioned design allows for a more stable and natural change in vertical height from the middle region of the rear crossbeam 2 towards both ends, resulting in a more uniform variation in structural strength and improved mechanical properties of the rear crossbeam 2. It also reduces the weight of at least a portion of the structure at both ends of the rear crossbeam 2, thereby lowering the overall weight of the rear crossbeam 2 and meeting lightweight design requirements.

[0357] In some embodiments, each frame longitudinal beam 3 is formed with a clearance through hole 36 that runs laterally through the vehicle. The clearance through hole 36 communicates with the electric drive housing space 6 and is used to pass through the drive shaft 102 of the electric drive assembly.

[0358] Specifically, each frame longitudinal beam 3 has a clearance hole 36, which is used to avoid the drive shaft 102 of the electric drive assembly. The clearance hole 36 runs through the vehicle laterally and is connected to the electric drive housing space 6, allowing the drive shaft 102 of the electric drive assembly in the electric drive housing space 6 to extend from the clearance hole 36 along the vehicle's lateral direction, thus facilitating the arrangement of the electric drive assembly. Therefore, the clearance hole 36 prevents interference between the drive shaft 102 of the electric drive assembly and the frame longitudinal beam 3, thereby improving the stability and safety of the electric drive assembly operation.

[0359] The electric drive assembly serves as the driving source and may include a drive motor 1001 and a reduction gear structure. Power is output through the cooperation of the drive motor 1001 and the reduction gear structure. The electric drive assembly is installed within the electric drive housing 6 and has two drive shafts 102. The two drive shafts 102 extend laterally out of the electric drive housing 6 and can be connected to the axles of the two wheels of the vehicle, thus driving the wheels to rotate.

[0360] In some embodiments, at least one of the front crossbeam 1 and the two frame longitudinal beams 3 is provided with an electric drive mounting point 104. That is, the electric drive mounting point 104 can be provided in one of the front crossbeam 1 and the two frame longitudinal beams 3. Specifically, the electric drive mounting point 104 can be provided in the front crossbeam 1, and the electric drive mounting point 104 can be provided in either the left frame longitudinal beam 3 or the right frame longitudinal beam 3. Alternatively, the electric drive mounting point 104 can be provided in both the front crossbeam 1 and the two frame longitudinal beams 3. Through the above-mentioned arrangement methods, the electric drive assembly can be installed and laid out through the electric drive mounting point 104. The arrangement methods are diverse and can be flexibly selected.

[0361] Specifically, in this embodiment, electric drive mounting points 104 are respectively provided on the front crossbeam 1 and the two frame longitudinal beams 3. The front crossbeam 1 and the two frame longitudinal beams 3 can be connected to the electric drive assembly through the electric drive mounting points 104, thereby enabling the electric drive assembly to be installed on the subframe 100. Moreover, this arrangement allows the electric drive assembly to be installed in three different directions and positions, improving the connection strength of the electric drive assembly and ensuring stable and reliable operation of the electric drive assembly.

[0362] The front crossbeam 1 and the frame longitudinal beam 3 can each be equipped with one electric drive mounting point 104, or two electric drive mounting points 104, etc.

[0363] Furthermore, the electric drive mount mounting point 104 is used to press-fit the motor mount. Press-fitting the motor mount at the electric drive mount mounting point 104 can be used for the installation of the electric drive assembly, which is suitable for two-wheel drive, rear-wheel drive and four-wheel drive modes. When the vehicle is in front-wheel drive mode, the motor mount is not pressed-fitted at the electric drive mount mounting point 104, that is, the electric drive assembly is not installed. Thus, it can be adapted to different types of vehicles and expand the scope of use.

[0364] It should also be noted that the subframe 100 can be connected and fixed to the vehicle body structure by providing a vehicle body mounting part 105 at the front and rear ends of the two frame longitudinal beams 3, or by providing a vehicle body mounting part 105 at the left and right ends of the front crossbeam 1 and the rear crossbeam 2. Both of these methods can be used to connect the subframe 100 to the vehicle body structure.

[0365] This application also proposes a vehicle.

[0366] The vehicle according to the embodiments of this application includes a subframe 100 of any of the above embodiments. An electric drive housing space 6 is defined by a front crossbeam 1, a rear crossbeam 2 and two frame longitudinal beams 3, which can realize the installation of the electric drive assembly. The rear lower arm mounting bracket 43 is provided and connected to the bottom of the frame longitudinal beam 3 and the bottom of the rear crossbeam 2 respectively. This can increase the connection area between the rear lower arm mounting bracket 43 and the subframe 100, thereby enhancing the connection strength between the two and improving the connection reliability between the rear lower control arm and the wheels and the subframe 100. This can reduce the vibration generated during vehicle operation, so as to make the vehicle run stably and improve the ride comfort.

[0367] The rear subframe 100 according to an embodiment of this application is described below with reference to Figures 16 and 19. By providing an electric drive housing space 6 between two frame longitudinal beams 3, the electric drive assembly can be installed. Each frame longitudinal beam 3 is provided with a clearance hole 36 that runs through the vehicle laterally. In this way, the drive shaft 102 of the electric drive assembly can extend laterally from the two frame longitudinal beams 3 and be connected to the wheel axle respectively to realize the rotation of the rear wheel.

[0368] As shown in Figures 16 and 19, a rear subframe 100 according to an embodiment of this application includes: a frame crossbeam 106 and a frame longitudinal beam 3.

[0369] Two frame longitudinal beams 3 are distributed at intervals along the transverse direction of the vehicle, and at least one frame crossbeam 106 is connected between the two frame longitudinal beams 3.

[0370] Specifically, there is at least one frame crossbeam 106, meaning there can be one, two, three, etc. There are also two frame longitudinal beams 3, extending longitudinally along the vehicle to transmit and dissipate longitudinal forces. These two longitudinal beams 3 are spaced apart laterally along the vehicle. At least one frame crossbeam 106 can extend laterally along the vehicle to transmit and dissipate lateral forces. This at least one frame crossbeam 106 connects to the two frame longitudinal beams 3, enabling the connection of the rear subframe 100. Furthermore, the at least one frame crossbeam 106 supports the two frame longitudinal beams 3, and through their interaction, the overall structural strength of the rear subframe 100 is improved.

[0371] The rear subframe 100 is a crucial chassis component of the vehicle. Located at the rear of the vehicle, it securely fastens internal and rear components to the chassis, ensuring stability during vehicle operation. Furthermore, in the event of a collision, the external force is transmitted and dispersed along the two longitudinal beams 3 and cross beams 106 of the rear subframe 100, reducing deformation and maintaining vehicle stability and safety.

[0372] Furthermore, the two transverse ends of the frame crossbeam 106 are welded to the inner sides of the two frame longitudinal beams 3 respectively, resulting in high welding strength and improving the overall strength of the rear subframe 100. The two transverse ends of the frame crossbeam 106 can also be connected to the two frame longitudinal beams 3 respectively via bolts or other connecting components.

[0373] Among them, an electric drive housing space 6 is provided between the two frame longitudinal beams 3. Each frame longitudinal beam 3 is formed with a clearance through hole 36 that runs through the vehicle laterally. The clearance through hole 36 is connected to the electric drive housing space 6 and is used to pass through the drive shaft 102 of the electric drive assembly.

[0374] Specifically, the rear subframe 100 serves as a mounting platform for the vehicle's rear suspension system, powertrain system, and some body components. Two longitudinal beams 3 are spaced apart laterally along the vehicle to form an electric drive housing 6, which houses the electric drive assembly. Each longitudinal beam 3 has a clearance hole 36 to allow passage of the electric drive assembly's drive shaft 102. The clearance hole 36 extends laterally along the vehicle and connects to the electric drive housing 6, allowing the drive shaft 102 of the electric drive assembly within the housing 6 to extend laterally from the clearance hole 36, thus facilitating the arrangement of the electric drive assembly. Therefore, the clearance hole 36 prevents interference between the electric drive assembly's drive shaft 102 and the longitudinal beams 3, thereby improving the stability and safety of the electric drive assembly's operation.

[0375] The electric drive assembly serves as the driving source and may include a drive motor 1001 and a reduction gear structure. Power is output through the cooperation of the drive motor 1001 and the reduction gear structure. The electric drive assembly is installed within the electric drive housing 6 and has two drive shafts 102. The two drive shafts 102 extend laterally out of the electric drive housing 6 and can be connected to the axles of the two wheels of the vehicle, thus driving the wheels to rotate.

[0376] According to the rear subframe 100 of this application embodiment, an electric drive housing space 6 is provided between two frame longitudinal beams 3 to realize the installation of the electric drive assembly. Each frame longitudinal beam 3 is provided with a clearance through hole 36 that runs through the vehicle laterally. In this way, the drive shaft 102 of the electric drive assembly can extend laterally from the two frame longitudinal beams 3 and be connected to the wheel axle respectively to realize the rotation of the rear wheel.

[0377] In some embodiments, at least a portion of the frame longitudinal beam 3 is configured as a through structure 37, which includes an upper arch 371 and a lower arch 372, with the upper arch 371 located above the lower arch 372, and a clearance perforation 36 formed between the upper arch 371 and the lower arch 372.

[0378] Specifically, by setting at least a portion of the frame longitudinal beam 3 as a through structure 37, at least a portion of the frame longitudinal beam 3 is used for the through-running of the drive shaft 102 of the electric drive assembly, and the remaining portion of the frame longitudinal beam 3 is used for connection with other structures, and the remaining portion can maintain the structural strength of the frame longitudinal beam 3, so as to improve the overall strength of the rear subframe 100.

[0379] The through-structure 37 includes an upper arched portion 371 and a lower arched portion 372 connected together. The upper arched portion 371 is connected to the upper side of the lower arched portion 372. The upper arched portion 371 and the lower arched portion 372 are curved away from each other in the longitudinal direction of the vehicle, forming an upper arched portion 371 that arches upwards and a lower arched portion 372 that arches downwards. A clearance through-hole 36 is provided between the upper arched portion 371 and the lower arched portion 372 to allow the drive shaft 102 of the electric drive assembly to pass through. The clearance through-hole 36 can be located at the center of the upper arched portion 371 and the lower arched portion 372 to ensure the strength of the through-structure 37 at the clearance through-hole 36. The clearance through-hole 36 can be constructed as a round hole, an elliptical hole, etc.

[0380] Therefore, by setting the through-hole structure 37 as a combination of the upper arched part 371 and the lower arched part 372, the structural area of ​​the through-hole structure 37 relative to other parts of the frame longitudinal beam 3 is increased to ensure the strength of the through-hole structure 37. In addition, the through-hole 36 can be provided to allow the drive shaft 102 of the electric drive assembly to pass through. Through the through-hole structure 37 with high structural strength, the reliable installation of the electric drive assembly can be achieved.

[0381] In some embodiments, the height of the frame longitudinal beam 3 in the vertical direction of the vehicle is set to gradually decrease from the through structure 37 towards the front and from the through structure 37 towards the rear.

[0382] Specifically, as shown in Figure 19, in the vertical direction of the vehicle, the vertical height of the longitudinal beam 3 at the front and rear sides of the through-structure 37 is less than the vertical height of the through-structure 37. This maximizes the strength of the through-structure 37 and satisfies the strength requirements of the longitudinal beam 3 at the front and rear sides of the through-structure 37. Furthermore, the vertical height of the longitudinal beam 3 gradually decreases from the through-structure 37 forward, making the connection of the longitudinal beam 3 from the through-structure 37 forward smoother. Similarly, the vertical height of the longitudinal beam 3 gradually decreases from the through-structure 37 backward, making the connection of the longitudinal beam 3 from the through-structure 37 backward smoother. This allows the vertical height of the longitudinal beam 3 to gradually increase and then gradually decrease from front to back, resulting in a natural transition in the overall structure. This ensures a stable change in the structural strength of the longitudinal beam 3 from front to back, thereby improving the overall strength of the longitudinal beam 3.

[0383] Furthermore, the vertical height at the through structure 37 is the largest, which maximizes the strength of the through structure 37, facilitates the setting of the avoidance hole 36 at the through structure 37, and ensures the strength requirements of the frame longitudinal beam 3.

[0384] In some embodiments, the top of the upper arch 371 is higher than the top surface of the frame crossbeam 106, which allows the top of the frame longitudinal beam 3 at the upper arch 371 to be higher than the top surface of the frame crossbeam 106, and the vertical height of the frame longitudinal beam 3 at the upper arch 371 is greater, thus improving the structural strength at the upper arch 371. Furthermore, when the vehicle is subjected to external force, the external force is transmitted along the frame crossbeam 106, and after being transmitted to the frame longitudinal beam 3, it is transmitted upwards along an arc-shaped path from the upper arch 371, which is higher than the top surface of the frame crossbeam 106. Compared to a straight force transmission path, this increases the length of the force transmission path of the frame longitudinal beam 3, allowing for faster force dispersion and reducing damage to the frame longitudinal beam 3.

[0385] Furthermore, the top of the frame crossbeam 106 is positioned low, allowing for more space to be used for the installation of more structures.

[0386] In other embodiments, the bottom of the lower arch 372 is lower than the bottom surface of the frame crossbeam 106, which allows the bottom of the frame longitudinal beam 3 at the lower arch 372 to be lower than the bottom surface of the frame crossbeam 106. Furthermore, the vertical dimension of the frame longitudinal beam 3 at the lower arch 372 is larger, improving the structural strength at the lower arch 372. When the vehicle is subjected to external force, the force is transmitted along the frame crossbeam 106, and after reaching the frame longitudinal beam 3, it is transmitted downwards in an arc-shaped path from the lower arch 372, which is lower than the bottom surface of the frame crossbeam 106. Compared to a straight force transmission path, this increases the length of the force transmission path of the frame longitudinal beam 3, allowing for faster force dispersion and reducing damage to the frame longitudinal beam 3.

[0387] Furthermore, an avoidance perforation 36 is provided between the upper arched portion 371 and the lower arched portion 372. The avoidance perforation 36 can separate the upper arched portion 371 and the lower arched portion 372, so that the longitudinal beam 3 of the frame can form force transmission paths in the upper arched portion 371 and the lower arched portion 372 respectively, increasing the force transmission paths and thus improving the collision performance of the longitudinal beam 3 of the frame.

[0388] In some embodiments, the clearance holes 36 of the two frame longitudinal beams 3 are distributed opposite each other in the transverse direction of the vehicle and are symmetrically connected to both sides of the electric drive housing space 6.

[0389] Specifically, both longitudinal beams 3 of the frame are provided with clearance holes 36. The two clearance holes 36 are distributed opposite each other along the transverse direction of the vehicle, and both clearance holes 36 are connected to the two transverse ends of the electric drive housing space 6. The electric drive assembly is located in the electric drive housing space 6 and has two drive shafts 102. The two drive shafts 102 of the electric drive assembly pass through the clearance holes 36 in opposite directions along the transverse direction of the vehicle. They can be symmetrically connected to the wheel axles on the left and right sides of the vehicle to drive the rotation of the left wheel and the right wheel of the vehicle respectively.

[0390] Therefore, through the above configuration, the two drive shafts 102 of the electric drive assembly can be symmetrically distributed laterally in the vehicle, and the electric drive assembly can be symmetrically connected to the left wheel axle and the right wheel axle laterally in the vehicle. This allows the electric drive assembly to simultaneously drive the left wheel axle and the right wheel axle to rotate at the same time, thereby improving the synchronicity of the rotation of the left and right wheels, making the vehicle run more smoothly, and the installation process is simple and easy to maintain.

[0391] In some embodiments, there are two crossbeams 106, namely a front crossbeam 1 and a rear crossbeam 2, which are distributed at intervals along the front-rear direction. Two longitudinal beams 3 are spaced apart and connected between the front crossbeam 1 and the rear crossbeam 2 to jointly define the electric drive housing space 6.

[0392] Specifically, as shown in Figure 16, both the front crossbeam 1 and the rear crossbeam 2 extend laterally along the vehicle, and the front crossbeam 1 and the rear crossbeam 2 are spaced apart along the front-rear direction of the vehicle. The two frame longitudinal beams 3 are also spaced apart laterally along the vehicle. The front crossbeam 1 is connected to the front end of the two frame longitudinal beams 3, and the rear crossbeam 2 is connected to the rear end of the two frame longitudinal beams 3. In this way, the front crossbeam 1, the rear crossbeam 2, and the two frame longitudinal beams 3 together define the electric drive housing space 6 for the installation of the electric drive assembly.

[0393] The front ends of the two frame longitudinal beams 3 are supported and connected by the front crossbeam 1, which can improve the structural stability of the front end of the frame longitudinal beams 3. The rear ends of the two frame longitudinal beams 3 are supported and connected by the rear crossbeam 2, which can improve the structural stability of the rear end of the frame longitudinal beams 3. This improves the structural stability of the rear subframe 100, thus providing reliable installation conditions for the electric drive assembly and facilitating the reliable installation of the suspension system structure, thereby improving the stability of vehicle operation.

[0394] In some embodiments, the distance between the clearance perforation 36 and the front crossbeam 1 is smaller than the distance between the clearance perforation 36 and the rear crossbeam 2.

[0395] Specifically, as shown in Figure 19, in the front-rear direction, the clearance hole 36 is set close to the front crossbeam 1, that is, the distance between the clearance hole 36 and the front crossbeam 1 is less than the distance between the clearance hole 36 and the rear crossbeam 2. The clearance hole 36 is located in the front area of ​​the frame longitudinal beam 3, and the clearance hole 36 is used for the drive shaft 102 of the electric drive assembly to pass through. That is, the drive shaft 102 of the electric drive assembly passes through the clearance hole 36 from the position of the frame longitudinal beam 3 close to the front crossbeam 1. This allows the space in the rear area of ​​the frame longitudinal beam 3 to be used for the arrangement of other structures, and the structure is compact and the layout is reasonable.

[0396] Furthermore, the avoidance perforation 36 can be located at any position in the front section of the longitudinal beam 3, forward from the middle position. It can be flexibly arranged according to the actual structural distribution, so as to maintain the strength requirements of the longitudinal beam 3 and not interfere with other structures.

[0397] The distance between the clearance perforation 36 and the front crossbeam 1 should not be less than the distance between the clearance perforation 36 and the rear crossbeam 2. In this way, the drive shaft 102 of the electric drive assembly will not occupy the rear space of the frame longitudinal beam 3, thus avoiding interference with the structure at the rear of the vehicle.

[0398] In some embodiments, at least one of the front crossbeam 1 and the two frame longitudinal beams 3 is provided with an electric drive mounting point 104. That is, the electric drive mounting point 104 can be provided in one of the front crossbeam 1 and the two frame longitudinal beams 3. Specifically, the electric drive mounting point 104 can be provided in the front crossbeam 1, and the electric drive mounting point 104 can be provided in the left frame longitudinal beam 3 or the right frame longitudinal beam 3. Alternatively, the electric drive mounting point 104 can be provided in the front crossbeam 1 and the two frame longitudinal beams 3 respectively. Through the above-mentioned arrangement methods, the electric drive assembly can be installed and laid out through the electric drive mounting point 104. The arrangement methods are diverse and can be flexibly selected.

[0399] Specifically, in this embodiment, electric drive mounting points 104 are respectively provided on the front crossbeam 1 and the two frame longitudinal beams 3. The front crossbeam 1 and the two frame longitudinal beams 3 can be connected to the electric drive assembly through the electric drive mounting points 104, thereby enabling the electric drive assembly to be installed on the rear subframe 100. Moreover, this arrangement allows the electric drive assembly to be installed in three different directions and positions, improving the connection strength of the electric drive assembly and ensuring stable and reliable operation of the electric drive assembly.

[0400] The front crossbeam 1 and the frame longitudinal beam 3 can each be equipped with one electric drive mounting point 104, or two electric drive mounting points 104, etc.

[0401] Furthermore, the electric drive mount mounting point 104 is used to press-fit the motor mount. Press-fitting the motor mount at the electric drive mount mounting point 104 can be used for the installation of the electric drive assembly, which is suitable for two-wheel drive, rear-wheel drive and four-wheel drive modes. When the vehicle is in front-wheel drive mode, the motor mount is not pressed-fitted at the electric drive mount mounting point 104, that is, the electric drive assembly is not installed. Thus, it can be adapted to different types of vehicles and expand the scope of use.

[0402] In some embodiments, the upper end of the front crossbeam 1 is provided with a front upper control arm bracket 40 and the lower end is provided with a front lower arm mounting bracket 41, and the front upper control arm bracket 40 and / or the front lower arm mounting bracket 41 are connected to the front end of the vehicle frame longitudinal beam 3.

[0403] In other words, the upper front control arm bracket 40 and / or the lower front arm mounting bracket 41 can be respectively installed on the upper and lower sides of the front end of the front crossbeam 1, or the upper front control arm bracket 40 and / or the lower front arm mounting bracket 41 can be respectively installed on the upper and lower sides of the front end of the frame longitudinal beam 3, or one of the upper front control arm bracket 40 and / or the lower front arm mounting bracket 41 can be installed on the front crossbeam 1 and the other on the frame longitudinal beam 3. The installation methods are diverse and can be flexibly selected.

[0404] Specifically, the front upper control arm bracket 40 is used to install the front upper control arm, and the front lower control arm bracket 41 is used to install the front lower control arm. The front upper control arm bracket 40 can connect one end of the front upper control arm to the upper end of the rear subframe 100, and the other end of the front upper control arm can be connected to the wheel. The front lower control arm bracket 41 can connect one end of the front lower control arm to the lower end of the rear subframe 100, and the other end of the front lower control arm can be connected to the wheel. This achieves the connection between the wheel and the rear subframe 100. The front upper control arm and the front lower control arm can achieve the force transmission between the wheel and the rear subframe 100 to ensure the stable operation of the wheel.

[0405] The upper front control arm bracket 40 and the lower front control arm mounting bracket 41 can be connected to the front crossbeam 1 or the frame longitudinal beam 3 by welding. Furthermore, the upper front control arm bracket 40 and the lower front control arm mounting bracket 41 can each be provided with front connection holes for mounting the upper front control arm and the lower front control arm.

[0406] In other embodiments, the upper end of the rear crossbeam 2 is provided with a rear upper control arm bracket 42 and the lower end is provided with a rear lower control arm bracket 43, and the rear upper control arm bracket 42 and / or the rear lower control arm bracket 43 are connected to the rear end of the frame longitudinal beam 3.

[0407] In other words, the upper rear control arm bracket 42 and / or the lower rear control arm bracket 43 can be respectively installed on the upper and lower sides of the rear end of the rear crossbeam 2, or the upper rear control arm bracket 42 and / or the lower rear control arm bracket 43 can be respectively installed on the upper and lower sides of the rear end of the frame longitudinal beam 3, or one of the upper rear control arm bracket 42 and / or the lower rear control arm bracket 43 can be installed on the rear crossbeam 2 and the other on the frame longitudinal beam 3. The installation methods are diverse and can be flexibly selected.

[0408] Specifically, the upper rear control arm bracket 42 is used to install the upper rear control arm, and the lower rear control arm bracket 43 is used to install the lower rear control arm. One end of the upper rear control arm can be connected to the upper end of the rear subframe 100 through the upper rear control arm bracket 42, and the other end of the upper rear control arm is connected to the wheel. Similarly, one end of the lower rear control arm can be connected to the lower end of the rear subframe 100 through the lower rear control arm bracket 43, and the other end of the lower rear control arm is connected to the wheel. This achieves the connection between the wheel and the rear subframe 100. The upper and lower rear control arms can transmit force between the wheel and the rear subframe 100 to ensure stable wheel operation, reduce vibration during vehicle operation, and improve ride comfort.

[0409] The upper rear control arm bracket 42 and the lower rear control arm bracket 43 can be connected to the rear crossbeam 2 or the longitudinal beam of the frame 3 by welding. Furthermore, the upper rear control arm bracket 42 and the lower rear control arm bracket 43 can each be provided with rear connection holes for mounting the upper rear control arm and the lower rear control arm.

[0410] It should also be noted that the rear subframe 100 can be connected and fixed to the vehicle body structure by providing a vehicle body mounting part 105 at the front and rear ends of the two frame longitudinal beams 3, or by providing a vehicle body mounting part 105 at the left and right ends of the front crossbeam 1 and the rear crossbeam 2. Both of these methods can be used to connect the rear subframe 100 to the vehicle body structure.

[0411] This application also proposes a vehicle.

[0412] The vehicle according to the embodiments of this application includes the rear subframe 100 of any of the above embodiments. By providing an electric drive housing space 6 between the two frame longitudinal beams 3, the electric drive assembly can be installed. Each frame longitudinal beam 3 is provided with a clearance through hole 36 that runs through the vehicle laterally. In this way, the drive shaft 102 of the electric drive assembly can extend laterally from the two frame longitudinal beams 3 and be connected to the wheel axle respectively. The wheels are connected to the rear subframe 100 through the front upper control arm bracket 40, the front lower arm mounting bracket 41, the rear upper control arm bracket 42, and the rear lower control arm bracket 43 to achieve stable rotation of the rear wheels.

[0413] The rear subframe 100 according to an embodiment of this application is described below with reference to Figures 20-25. The rear subframe 100 effectively avoids interference or collision between the drive shaft 102 and the longitudinal beam 3 of the frame, so that the drive shaft 102 can maintain a stable motion state under any working condition, thereby ensuring the stability and safe driving of the vehicle.

[0414] As shown in Figures 20-25, a rear subframe 100 according to one embodiment of the present application includes: at least one frame crossbeam 106 and two frame longitudinal beams 3.

[0415] The frame crossbeam 106 is used to connect and reinforce the two frame longitudinal beams 3 to improve the overall strength and rigidity of the rear subframe 100, thereby improving the overall stability and reliability of the rear subframe 100. The number of frame crossbeams 106 can be set to one, two or even more. Setting multiple frame crossbeams 106 can make the connection of the frame longitudinal beams 3 more stable, thereby further improving the overall strength and rigidity of the rear subframe 100.

[0416] Two longitudinal frame beams 3 are distributed laterally along the vehicle, meaning they are spaced a certain distance apart in the left-right direction. One longitudinal frame beam 3 is located on the left side, and the other on the right side, to support the frame on both sides and better transmit and distribute the forces experienced by the vehicle under various operating conditions. At least one crossbeam 106 connects the two longitudinal frame beams 3; that is, the left end of the crossbeam 106 connects to the left longitudinal frame beam 3, and the right end connects to the right longitudinal frame beam 3. This crossbeam 106 connects the two longitudinal frame beams 3, reinforcing them and providing lateral support to the frame, thus improving the overall strength and rigidity of the rear subframe 100. Furthermore, one, two, or more frame crossbeams 106 can be connected between two frame longitudinal beams 3, so that the frame crossbeams 106 and the frame longitudinal beams 3 can form a more stable frame structure, thereby further improving the overall stability and load-bearing capacity of the rear subframe 100.

[0417] Furthermore, an electric drive housing space 6 is formed between the two frame longitudinal beams 3, as shown in Figure 20. Since the two frame longitudinal beams 3 are spaced apart by a certain distance, a certain space is formed between the two frame longitudinal beams 3, namely the electric drive housing space 6. The electric drive housing space 6 is used to house the electric drive assembly 101 to ensure the normal operation of the electric drive assembly 101 and at the same time, to ensure its heat dissipation effect.

[0418] As shown in Figure 20, each frame longitudinal beam 3 includes a front section 30 and a rear section 38. At least a portion of the front section 30 is constructed as an arched structure 5, which is arched upwards to form a clearance space 51 below it. The clearance space 51 is connected to the electric drive housing space 6 and serves to allow clearance for the drive shaft 102 of the electric drive assembly. Thus, the drive motor 1001 can be installed in the electric drive housing space 6 to ensure its normal operation. The clearance space 51 provides sufficient installation space for the drive shaft 102 of the electric drive assembly, allowing it to pass smoothly through the clearance space 51 to connect with the wheels. This achieves stable installation of the drive shaft 102, avoids installation interference between the drive shaft 102 and the frame longitudinal beam 3, and improves the performance and efficiency of the electric drive assembly 101.

[0419] It should be noted that during vehicle operation, when the wheels move, the drive shaft 102 will also move due to the vibration of the suspension system and the wheels. It is necessary to consider the space and position that the drive shaft 102 may occupy under various working conditions, that is, the motion envelope of the drive shaft 102. In other words, it is necessary to consider all the space and position that the drive shaft 102 may occupy due to the vibration and steering of the wheels. The size of the clearance space 51 can be set according to the motion envelope of the drive shaft 102 to leave enough space for the drive shaft 102 to move. That is, the clearance space 51 can fully accommodate the range of motion of the drive shaft 102, thereby effectively avoiding motion interference or collision between the drive shaft 102 and the longitudinal beam 3 of the frame when the drive shaft 102 moves. This allows the drive shaft 102 to maintain a stable motion state under any working condition, thereby ensuring the stability and safe driving of the vehicle.

[0420] Therefore, the setting of the clearance space 51 not only ensures the normal installation of the drive shaft 102 of the electric drive assembly, but also provides sufficient movement space for the drive shaft 102 of the electric drive assembly, thereby effectively avoiding interference or collision between the drive shaft 102 and the longitudinal beam 3 of the frame, so that the drive shaft 102 can maintain a stable movement state under any working condition, thereby ensuring the stability and safe driving of the vehicle.

[0421] According to the rear subframe 100 of the present application embodiment, by constructing at least a portion of the front section 30 of the longitudinal beam as an arch structure 5, and forming a clearance space 51 below the arch structure 5 for avoiding the drive shaft 102 of the electric drive assembly, not only is the normal installation of the drive shaft 102 of the electric drive assembly guaranteed, but also sufficient movement space is provided for the drive shaft 102 of the electric drive assembly, thereby effectively avoiding interference or collision between the drive shaft 102 and the longitudinal beam 3 of the frame, so that the drive shaft 102 can maintain a stable movement state under any working condition, thereby ensuring the stability and safe driving of the vehicle.

[0422] In some embodiments, as shown in Figures 20 and 24, the electric drive housing 6 includes a front housing 61 and a rear housing 62. The front housing 61 is connected to the front side of the rear housing 62, that is, the front housing 61 is located on the front side and the rear housing 62 is located on the rear side, and the front housing 61 and the rear housing 62 are connected to each other, so as to facilitate the installation of structural components in the front housing 61 and the rear housing 62 respectively.

[0423] Further, as shown in Figures 20 and 25, the front accommodating space 61 is formed between the front sections 30 of the two frame longitudinal beams 3. That is, the front accommodating space 61 is a space formed by the gap between the front sections 30 of the two frame longitudinal beams 3. The front accommodating space 61 is used to accommodate the reducer 1002 and the drive shaft 102. That is, the reducer 1002 and the drive shaft 102 are installed and accommodated in the front of the rear subframe 100. The reducer 1002 is an important structural component in the electric drive structure. It is used to reduce the speed of the drive motor 1001 and increase the torque so as to drive the wheels. The output torque of the reducer 1002 can be transmitted to the wheels through the drive shaft 102 to ensure the stable driving of the vehicle.

[0424] The clearance space 51 is connected to the front receiving space 61. Since the front section 30 of the longitudinal beam is an arched structure 5, the arched structure 5 arches upwards to form the clearance space 51 below. By connecting the clearance space 51 to the front receiving space 61, the size of the front receiving space 61 is increased to a certain extent, which facilitates better installation and accommodation of the reducer 1002 and the drive shaft 102. At the same time, it also allows the drive shaft 102 to avoid the longitudinal beam 3 of the chassis, enabling it to smoothly connect with the wheels and transmit power. Furthermore, the drive shaft 102 can move freely within the clearance space 51. The drive shaft 102 moves freely within the frame without being obstructed by the longitudinal beam 3, thus ensuring the normal and stable operation of the reducer 1002 and the drive shaft 102, reducing the frictional loss of the drive shaft 102. Especially when the wheel bounces upward, causing the drive shaft 102 to move upward, it can effectively prevent the drive shaft 102 from moving upward and hitting the front section 30 of the longitudinal beam, causing noise and damage. It can also prevent the drive shaft 102 from hitting the front section 30 of the longitudinal beam when moving forward, backward or in other directions, causing noise and damage.

[0425] As shown in Figures 20 and 25, the rear accommodating space 62 is formed between the rear sections 38 of the two longitudinal beams 3 of the frame. That is, the rear accommodating space 62 is the space formed by the gap between the rear sections 38 of the two longitudinal beams 3 of the frame. The rear accommodating space 62 is used to accommodate the drive motor 1001. That is, the drive motor 1001 is installed and accommodated in the rear of the rear subframe 100. The drive motor 1001 is the core component of the electric drive assembly 101 and is used to provide power to drive the vehicle forward. The drive motor 1001 can transmit power to the reducer 1002, and then the reducer 1002 reduces speed and increases torque, and then transmits it to the drive shaft 102. The drive shaft 102 drives the wheels to rotate, so as to realize the forward movement of the vehicle.

[0426] Therefore, by installing and accommodating the reducer 1002 and drive shaft 102 in the front accommodating space 61, and installing and accommodating the drive motor 1001 in the rear accommodating space 62, the space between the longitudinal beams 3 of the frame is fully utilized to achieve a reasonable allocation and installation of the electric drive assembly 101 and drive shaft 102, thereby improving space utilization and making the layout of the electric drive assembly 101 more compact, and easier to install, disassemble and maintain.

[0427] In some embodiments, the front sections 30 of the two frame longitudinal beams 3 are symmetrically distributed, that is, the front sections 30 of the two frame longitudinal beams 3 have the same shape and size and are symmetrically distributed in the left and right directions. Thus, at least a portion of the front sections 30 of the two frame longitudinal beams 3 are constructed as arched structures 5, and a clearance space 51 is formed below the arched structures 5 of the front sections 30 of the two frame longitudinal beams 3.

[0428] Furthermore, the clearance spaces 51 of the two frame longitudinal beams 3 are symmetrically connected to both sides of the front receiving space 61. In other words, the front receiving space 61 is surrounded by the clearance spaces 51 on the left and right sides. Since both clearance spaces 51 are connected to the front receiving space 61, the two drive shafts 102 in the front receiving space 61 can smoothly pass through the clearance spaces 51 to connect with the power of the left and right wheels.

[0429] Therefore, by symmetrically distributing the front sections 30 of the longitudinal beams 3 of the frame, the overall rigidity and stability of the rear subframe 100 are improved, so that the rear subframe 100 can better resist the influence of external forces and torque during vehicle operation, reducing the generation of vibration and noise. By connecting the clearance space 51 of the two frame longitudinal beams 3 with the two sides of the front receiving space 61, the two clearance spaces 51 and the front receiving space 61 are connected into one space, realizing the efficient use of the internal space of the frame, providing sufficient clearance space 51 for the left and right drive shafts 102, so that the left and right drive shafts 102 can respectively pass through the left and right clearance spaces 51 to connect with the left and right wheels.

[0430] In some embodiments, as shown in Figures 20, 21, 23 and 25, the front section 30 of the longitudinal beam further includes a front end structure 301, which is used to connect with the vehicle body. The front end structure 301 can be connected by welding, bolting or other connection methods to achieve a reliable and stable connection between the front section 30 of the longitudinal beam and the vehicle body.

[0431] In this design, the rear end of the arched structure 5 is connected to the front end of the rear section 38 of the longitudinal beam, forming a single integral structure. The front end structure 301 is connected to the front end of the arched structure 5, also forming a single integral structure. Thus, the arched structure 5 is tightly connected between the rear section 38 and the front end structure 301, together forming the overall longitudinal beam 3 structure of the vehicle frame. This ensures the structural continuity of the rear subframe 100, thereby improving the overall rigidity and stability of the rear subframe 100. In practical design, the rear end of the arched structure 5 can be welded to the front end of the rear section 38, and the front end structure 301 can also be welded to the front end of the arched structure 5 to improve connection strength and reliability. Alternatively, the front end structure 301, the arched structure 5, and the rear section 38 of the longitudinal beam can be integrated into a single unit, which is convenient to manufacture and has high structural strength.

[0432] Furthermore, the front-end structure 301 is constructed to tilt forward and downward relative to the arched structure 5. Specifically, as shown in Figure 21, the front-end structure 301 tilts forward and downward relative to the arched structure 5 and outward. This causes the height of the front-end structure 301 of the front section 30 of the longitudinal beam to gradually decrease from back to front, resulting in the overall height of the front-end structure 301 being lower than the overall height of the rear section 38 of the longitudinal beam. This allows the lower front control arm and upper front control arm mounted on the front section 30 of the longitudinal beam to move stably and freely, and to extend outward at an angle to facilitate connection with the vehicle body. This avoids interference with other structures such as the lower front control arm and upper front control arm, which could affect the movement of various structural components.

[0433] In some embodiments, as shown in FIG21, the front end structure 301 is configured to be lower than the rear section 38 of the longitudinal beam, and the height difference L8 between the front end of the front end structure 301 and the rear section 38 of the longitudinal beam satisfies: 100mm≤L8≤120mm.

[0434] In other words, the height difference L8 between the front end of the front structure 301 and the rear section 38 of the longitudinal beam can be set to 100mm, 102mm, 104mm, 106mm, 108mm, 109mm, 110.5mm, 111mm, 112mm, 114mm, 116mm, 118mm, 120mm, or other values ​​within the range of 100mm to 120mm. It can be understood that the larger the height difference L8 between the front end of the front structure 301 and the rear section 38 of the longitudinal beam, the lower the height of the front end of the front structure 301 and the higher the height of the rear section 38 of the longitudinal beam. Conversely, the smaller the height difference L8 between the front end of the front structure 301 and the rear section 38 of the longitudinal beam, the closer the heights of the front end of the front structure 301 and the rear section 38 of the longitudinal beam are.

[0435] It should be noted that the front upper control arm and the front lower control arm are installed on the front section 30 of the longitudinal beam, and the rear upper control arm, the rear lower control arm, and the rear suspension toe bar are installed on the rear section 38 of the longitudinal beam. The height difference L8 between the front end of the front structure 301 and the rear section 38 of the longitudinal beam depends on the relative positions of the front upper control arm and the front lower control arm, the rear upper control arm and the rear lower control arm, and the rear suspension toe bar. That is, it is necessary to ensure the normal installation and stable movement of the front upper control arm and the front lower control arm, the rear upper control arm and the rear lower control arm, and the rear suspension toe bar, and to avoid motion interference between them.

[0436] Therefore, by setting the height difference L8 between the front end of the front structure 301 and the rear section 38 of the longitudinal beam within a reasonable range of 100mm to 120mm, the front structure 301 can be smoothly and reliably connected to the vehicle body. This also ensures the normal installation and stable movement of the front upper control arm and front lower control arm, the rear upper control arm and rear lower control arm, and the rear suspension toe bar, avoiding movement interference between them, thereby ensuring the vehicle's stable and safe driving.

[0437] In some embodiments, as shown in Figures 20 and 23, there are two crossbeams 106, namely a front crossbeam 1 and a rear crossbeam 2. The front crossbeam 1 is located on the front side, and the rear crossbeam 2 is located on the rear side, with a certain distance between them. The front crossbeam 1 connects between the front end structures 301 of the two longitudinal beams 3 of the frame to connect and reinforce the front part of the two longitudinal beams 3 of the frame, thereby improving the structural strength and rigidity of the front part of the longitudinal beams 3 of the frame. In addition, since the front crossbeam 1 is connected between the front end structures 301 of the two longitudinal beams 3 of the frame, that is, in front of the clearance space 51, the front crossbeam 1 can avoid interfering with the installation of the drive shaft 102.

[0438] The rear crossbeam 2 is connected between the rear sections 38 of the two frame longitudinal beams 3 to connect and reinforce the rear of the two frame longitudinal beams 3, thereby improving the structural strength and rigidity of the rear of the frame longitudinal beams 3. Thus, by connecting the front crossbeam 1 and the rear crossbeam 2 between the two frame longitudinal beams 3, the overall structural strength and rigidity of the rear subframe 100 are effectively improved.

[0439] In other embodiments, both the front crossbeam 1 and the rear crossbeam 2 are lower than the inner apex of the clearance space 51. That is, the height of the upper surfaces of the front crossbeam 1 and the rear crossbeam 2 is lower than the height of the inner apex of the clearance space 51, and they are located below the inner apex of the clearance space 51. Thus, while ensuring that the structural strength of the front crossbeam 1 and the rear crossbeam 2 is sufficient, the size of the clearance space 51 in the vertical direction can be increased, which is conducive to the free movement of the drive shaft 102 within the clearance space 51, and further avoids interference or collision between the drive shaft 102 and the lower surface of the arch structure 5.

[0440] Of course, the front crossbeam 1 and the rear crossbeam 2 can also be set to be higher than the inner vertex of the clearance space 51, or the front crossbeam 1 and the rear crossbeam 2 can be at the same height as the inner vertex of the clearance space 51. The settings can be flexibly adjusted according to the situation and are not limited to those described in this embodiment.

[0441] In some embodiments, the front crossbeam 1 is provided with a front electric drive mount mounting point 11. The front electric drive mount mounting point 11 is mainly used to mount the front motor mount, so that the front motor mount can support the drive motor 1001 on the front side and connect to the front crossbeam 1, thereby ensuring that the drive motor 1001 can be stably mounted on the vehicle, avoiding the drive motor 1001 from moving in the front-rear direction and interfering or colliding with surrounding components, thereby ensuring the normal operation of the drive motor 1001.

[0442] Each frame longitudinal beam 3 is provided with a rear electric drive mount mounting point 1043 at the connection between the arch structure 5 and the rear section 38 of the longitudinal beam. The rear electric drive mount mounting point 1043 is mainly used to install the rear motor mount, so that the rear motor mount can support the drive motor 1001 on the left and right sides and connect with the two frame longitudinal beams 3, thereby ensuring that the drive motor 1001 can be stably installed on the vehicle, avoiding the drive motor 1001 from moving in the left and right direction and interfering or colliding with the surrounding components, thus ensuring the normal operation of the drive motor 1001.

[0443] The front electric drive mounting point 11 and the two rear electric drive mounting points 1043 are arranged in an isosceles triangle, that is, the two rear electric drive mounting points 1043 are symmetrically distributed from left to right, and the front electric drive mounting point 11 is located in the middle of the front crossbeam 1. Thus, the three mounting points are arranged in an isosceles triangle. Since triangles have stability, this effectively ensures the overall stability and reliable installation of the drive motor 1001, limits the displacement of the drive motor 1001 in the front-rear direction and the left-right direction, avoids excessive displacement of the drive motor 1001 from interfering with or colliding with surrounding components to cause damage or noise, effectively ensures the normal operation of the drive motor 1001, and extends the service life of the drive motor 1001.

[0444] In addition, in practice, the center of mass of the drive motor 1001 can be made to fall within the isosceles triangular plane formed by the front electric drive mounting point 11 and the two rear electric drive mounting points 1043. This ensures that the center of mass of the drive motor 1001 is coplanar with the isosceles triangular plane formed by the front electric drive mounting point 11 and the two rear electric drive mounting points 1043, which can further improve the installation stability of the drive motor 1001 and further prevent the drive motor 1001 from swinging too much during operation, generating too much displacement, and interfering or colliding with surrounding components.

[0445] Specifically, as shown in Figures 20 and 23, a front mounting hole is provided at the middle position of the front crossbeam 1, and the front electric drive mounting point 11 can be press-fitted into the front mounting hole. Both frame longitudinal beams 3 have rear mounting holes at the connection between the arch structure 5 and the rear section 38 of the longitudinal beam, and the two rear mounting holes are symmetrically distributed in the left and right direction. The two rear electric drive mounting points 1043 can be press-fitted into the rear mounting holes, so that the front electric drive mounting point 11 and the two rear electric drive mounting points 1043 are distributed in an isosceles triangle.

[0446] In some embodiments, as shown in FIG21, the distance from the center of the clearance space 51 to the front end of the longitudinal beam 30 is L10, and satisfies: 300mm≤L10≤350mm.

[0447] In other words, the distance L10 from the center of the clearance space 51 to the front end of the longitudinal beam 30 can be set to 300mm, 302mm, 303.5mm, 306mm, 310mm, 314mm, 316.7mm, 320mm, 324mm, 328mm, 330mm, 332mm, 335mm, 339mm, 340mm, 342mm, 344mm, 346mm, 348mm, 350mm, or other values ​​within the range of 300mm to 350mm.

[0448] The distance L10 from the center of the clearance space 51 to the front end of the longitudinal beam 30 depends on the longitudinal position of the drive shaft 102 on the vehicle, the size of the drive shaft 102, and the installation position of the output shaft of the drive motor 1001. By setting the distance L10 from the center of the clearance space 51 to the front end of the longitudinal beam 30 within a reasonable range of 300mm to 350mm, the smooth installation and normal operation of the drive shaft 102 and the output shaft of the drive motor 1001 can be effectively guaranteed, and the compactness of the electric drive assembly 101 can be improved.

[0449] In some other embodiments, as shown in Figure 21, the distance from the center of the clearance space 51 to the rear end of the longitudinal beam 38 is L11, and satisfies: 450mm≤L11≤490mm.

[0450] In other words, the distance L11 from the center of the clearance space 51 to the rear end of the longitudinal beam 38 can be set to 450mm, 452mm, 454mm, 456mm, 460mm, 464mm, 466mm, 468mm, 470mm, 472mm, 474mm, 476mm, 478mm, 480mm, 482mm, 484mm, 486mm, 488mm, 490mm, or other values ​​within the range of 450mm to 490mm.

[0451] The distance L11 from the center of the clearance space 51 to the rear end of the longitudinal beam 38 depends on the longitudinal position of the drive shaft 102 on the vehicle, the size of the drive shaft 102, the installation position of the rear crossbeam 2, and the installation position of the rear upper control arm on the vehicle. By setting the distance L11 from the center of the clearance space 51 to the rear end of the longitudinal beam 38 within a reasonable range of 450mm to 4900mm, the smooth installation of the drive shaft 102, the rear crossbeam 2, and the rear upper control arm can be effectively guaranteed. While making effective use of space, installation interference and motion interference of various structural components are avoided, thereby effectively improving the compactness of the rear subframe 100 and the electric drive assembly 101, and ensuring the normal operation and movement of the drive shaft 102, the rear upper control arm, and other structural components.

[0452] In some embodiments, as shown in FIG21, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the longitudinal beam 30 is L6, and satisfies: 125mm≤L6≤145mm.

[0453] In other words, the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the longitudinal beam 30 can be set to 125mm, 126mm, 127mm, 128mm, 129mm, 130mm, 131mm, 132mm, 133mm, 134mm, 135mm, 136mm, 137mm, 138mm, 139mm, 140mm, 141mm, 142mm, 143mm, 144mm, 145mm, or other values ​​within the range of 125mm to 145mm.

[0454] It is understandable that the greater the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the longitudinal beam 30, that is, the higher the highest point of the clearance space 51 and the lower the lowest point of the front end of the longitudinal beam 30, the larger the clearance space 51 will be. However, this will cause the arched structure 5 to arch upward to a greater degree, resulting in a more complex structure, an increased size of the entire rear subframe 100 in the vertical direction of the vehicle, and an increase in the overall weight of the rear subframe 100.

[0455] Therefore, by setting the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the longitudinal beam 30 within a reasonable range of 125mm to 145mm, the overall size of the rear subframe 100 in the vertical direction of the vehicle can be effectively reduced, while the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the longitudinal beam 30 can be smaller. This makes the structure of the rear subframe 100 simpler, lighter, and improves the load transfer efficiency.

[0456] This application also proposes a vehicle.

[0457] The vehicle according to the embodiments of this application includes an electric drive assembly 101 and a rear subframe 100 of any of the above embodiments. The electric drive assembly 101 includes a drive motor 1001 and a reducer 1002. The drive motor 1001 and the reducer 1002 are both located in the electric drive housing space 6. The drive shaft 102 of the electric drive assembly 101 passes through the clearance space 51.

[0458] The vehicle in this embodiment can be a pure electric vehicle, a plug-in hybrid electric vehicle, a fuel cell electric vehicle, or a hybrid electric vehicle, etc.

[0459] Specifically, the output shaft of the drive motor 1001 can be connected to the input end of the reducer 1002 to transmit the power output by the drive motor 1001 to the reducer 1002. The reducer 1002 reduces speed and increases torque. The output end of the reducer 1002 can be connected to the drive shaft 102 to transmit the power output by the reducer 1002 to the drive shaft 102, thereby realizing the power transmission from the drive motor 1001 to the drive shaft 102, which in turn drives the wheel to rotate.

[0460] As shown in Figure 25, the drive motor 1001 and the reducer 1002 are both located in the electric drive housing space 6 to make full use of the space to achieve a reasonable arrangement of the drive motor 1001 and the reducer 1002 and realize efficient power transmission. The drive shaft 102 of the electric drive assembly 101 passes through the clearance space 51, that is, it passes through the clearance space 51 from the electric drive housing space 6 and then connects to the wheel to realize the drive of the wheel.

[0461] By constructing at least a portion of the front section 30 of the longitudinal beam as an arched structure 5, and forming a clearance space 51 below the arched structure 5 for avoiding the drive shaft 102 of the electric drive assembly 101, not only is the normal installation of the drive shaft 102 of the electric drive assembly 101 guaranteed, but also sufficient movement space is provided for the drive shaft 102 of the electric drive assembly 101. This effectively avoids interference or collision between the drive shaft 102 and the longitudinal beam 3 of the frame, so that the drive shaft 102 can maintain a stable movement state under any working condition, thereby ensuring the stability and safe driving of the vehicle.

[0462] The rear subframe 100 according to an embodiment of this application is described below with reference to Figures 26-28. It can avoid interference between the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101, thereby improving the reliability of the operation of the frame longitudinal beam 3 and the electric drive assembly 101. Furthermore, the front end of the frame longitudinal beam 3 can absorb collision energy by deformation when the vehicle is involved in a frontal collision, thereby improving the safety of the vehicle.

[0463] As shown in Figures 26-28, a rear subframe 100 according to one embodiment of the present application includes: at least one frame crossbeam 106 and two frame longitudinal beams 3.

[0464] Two frame longitudinal beams 3 are distributed laterally along the vehicle, and at least one frame crossbeam 106 is connected between the two frame longitudinal beams 3. At least a portion of the frame longitudinal beam 3 is constructed as an arch structure 5, which is constructed to arch upward to form a clearance space 51 below the arch structure 5 for avoiding the drive shaft 102 of the electric drive assembly 101. The arch structure 5 is constructed such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, and the front end of the frame longitudinal beam 3 is lower than the rear end of the frame longitudinal beam 3.

[0465] Specifically, the rear subframe 100 can be used to isolate vibrations and noise from the wheels and road surface, preventing them from being directly transmitted into the passenger compartment, thereby improving the vehicle's ride comfort. The rear subframe 100 includes a frame crossbeam 106 and a frame longitudinal beam 3. The frame crossbeam 106 is configured to extend laterally along the vehicle to transmit and dissipate lateral forces, while the frame longitudinal beam 3 is configured to extend longitudinally along the vehicle to transmit and dissipate longitudinal forces. Moreover, there is at least one frame crossbeam 106, meaning that the number of frame crossbeams 106 can be one, two, or three, etc., to achieve the desired effect through at least one... Each frame crossbeam 106 transmits lateral forces, improving the reliability of lateral force transmission and dissipation. There are two frame longitudinal beams 3, which can transmit longitudinal forces together, improving the reliability of longitudinal force transmission and dissipation. The two frame longitudinal beams 3 are distributed at intervals along the lateral direction of the vehicle, so that there is a certain distance between the two frame longitudinal beams 3. This allows the two frame longitudinal beams 3 to transmit longitudinal forces from two different positions at the same time, which can further improve the efficiency and reliability of longitudinal force transmission, and quickly transmit and dissipate longitudinal forces.

[0466] It should be noted that both the frame crossbeam 106 and the frame longitudinal beam 3 can be constructed as tubular structures to reduce the weight of the frame crossbeam 106 and the frame longitudinal beam 3 while ensuring that lateral and longitudinal forces can be transmitted and dissipated respectively. This reduces the overall weight of the rear subframe 100 and facilitates its installation on the vehicle.

[0467] Furthermore, by connecting at least one frame crossbeam 106 between two frame longitudinal beams 3, both ends of at least one frame crossbeam 106 can be simultaneously connected to the two frame longitudinal beams 3, so that at least one frame crossbeam 106 and the two frame longitudinal beams 3 can together form the basic frame structure of the rear subframe 100. Moreover, the frame crossbeam 106 and the frame longitudinal beams 3 can be connected by welding, making the rear subframe 100 a whole, which can improve the structural stability and operational reliability of the rear subframe 100. In addition, by connecting the frame crossbeam 106 and the frame longitudinal beams 3, the frame crossbeam 106 and the frame longitudinal beams 3 can jointly transmit and dissipate lateral and longitudinal forces, which can further improve the reliability and efficiency of transmitting and dissipating lateral and longitudinal forces, thereby effectively improving the ride comfort of the vehicle and helping to improve user satisfaction.

[0468] Meanwhile, by constructing at least a portion of the frame longitudinal beam 3 as an arch structure 5, or by constructing part or all of the frame longitudinal beam 3 as an arch structure 5, the shape of the frame longitudinal beam 3 can be changed so that the frame longitudinal beam 3 can avoid the drive shaft 102 of the electric drive assembly 101 at the arch structure 5, thereby avoiding interference between the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101, which would reduce the reliability of their operation. Moreover, by constructing the arch structure 5 to arch upwards, the arch structure 5 can be constructed as a bridge, so that a clearance space 51 is formed below the arch structure 5. The clearance space 51 is used to avoid the drive shaft 102 of the electric drive assembly 101, thereby avoiding interference between the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101, thereby improving the reliability of the operation of the frame longitudinal beam 3 and the electric drive assembly 101.

[0469] Furthermore, the arch structure 5 is constructed such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex. That is, the length of the part of the arch structure 5 located in front of the apex is greater than the length of the part located behind the apex. In other words, the arch structure 5 is an asymmetrical structure, which allows the arch structure 5 to adapt to more complex installation environments and facilitates the installation of the arch structure 5. Moreover, the front end of the frame longitudinal beam 3 is lower than the rear end of the frame longitudinal beam 3, which helps the frame longitudinal beam 3 to better absorb and disperse impact forces during a collision. That is, when the vehicle is involved in a frontal collision, the front end of the frame longitudinal beam 3 can absorb collision energy through deformation to protect the safety of the occupants and improve the safety of the vehicle.

[0470] According to the rear subframe 100 of this application embodiment, by connecting the frame crossbeam 106 and the frame longitudinal beam 3, the frame crossbeam 106 and the frame longitudinal beam 3 can jointly transmit and dissipate lateral and longitudinal forces, thereby improving the ride comfort of the vehicle. Furthermore, by constructing at least a portion of the frame longitudinal beam 3 as an arched structure 5 to form a clearance space 51, interference between the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101 can be avoided, thereby improving the reliability of the operation of the frame longitudinal beam 3 and the electric drive assembly 101. In addition, by constructing the arched structure 5 such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, the front end of the frame longitudinal beam 3 is lower than the rear end of the frame longitudinal beam 3, so that the front end of the frame longitudinal beam 3 can absorb collision energy through deformation when the vehicle is involved in a frontal collision, thereby improving the vehicle's safety.

[0471] In some embodiments, the arched structure 5 is located between the front end and the middle of the frame longitudinal beam 3, and the bottom surface of the front end and the bottom surface of the middle of the frame longitudinal beam 3 are both lower than the bottom surface of the rear end of the frame longitudinal beam 3.

[0472] Specifically, by placing the arched structure 5 between the front end and the middle of the longitudinal beam 3 of the frame, a portion of the longitudinal beam 3 can be constructed as an arched structure 5, reducing manufacturing difficulty and decreasing the vertical height of the longitudinal beam 3 along the vehicle, which facilitates the installation of the rear subframe 100 on the vehicle. Furthermore, by placing the arched structure 5 between the front end and the middle of the longitudinal beam 3 of the frame, both ends of the arched structure 5 can be connected to the front end and the middle of the longitudinal beam 3 of the frame, respectively. That is, the front end and the middle of the longitudinal beam 3 of the frame are respectively connected to the apex of the arched structure 5. Extending downwards both forwards and backwards, and with the bottom surfaces of the front and middle sections of the longitudinal beam 3 constructed to be lower than the bottom surface of the rear section, the longitudinal beam 3 exhibits a trend of being lower at the front and higher at the rear. Furthermore, the downward extension length of the front section of the longitudinal beam 3 is greater than the downward extension length of other sections on the longitudinal beam 3. This allows the front section of the longitudinal beam 3 to deform more easily during a frontal collision, facilitating the absorption of collision energy and improving vehicle safety.

[0473] In some embodiments, the height difference L4 between the front end and the rear end of the frame longitudinal beam 3 is 100mm≤L4≤120mm; and / or the distance between the front end and the rear end of the frame longitudinal beam 3 is d1, which satisfies 780mm≤d1≤800mm.

[0474] Specifically, the bottom surface of the front end of the longitudinal beam 3 is lower than the bottom surface of the rear end of the longitudinal beam 3. That is, the front end of the longitudinal beam 3 is lower than the rear end of the longitudinal beam 3, and the downward extension length of the front end of the longitudinal beam 3 is greater than the downward extension length of the rear end of the longitudinal beam 3. This is to facilitate the deformation of the front end of the longitudinal beam 3 to absorb collision energy during a frontal collision. The height difference L4 between the front end and the rear end of the longitudinal beam 3 can be between 100mm and 120mm, i.e., L4 can be 105mm, 108mm, or 115mm, etc. This avoids L4 being too large or too small. If it is too large, the height of the longitudinal beam 3 along the vertical direction of the vehicle will be too large, which is not conducive to the installation of the rear subframe 100 on the vehicle. If it is too small, the downward extension length of the front end of the longitudinal beam 3 will be too small, making it difficult to absorb collision energy through deformation during a frontal collision.

[0475] Meanwhile, the distance d1 between the front end and the rear end of the frame longitudinal beam 3 can be between 780mm and 800mm, that is, d1 can be 785mm, 791mm or 795mm, etc., which can avoid d1 being too large or too small. If it is too large, the longitudinal beam 3 will extend too long along the vehicle's longitudinal direction, which is not conducive to the installation of the rear subframe 100 on the vehicle. If it is too small, the longitudinal beam 3 will extend too long along the vehicle's longitudinal direction, which will result in the clearance space 51 being too small along the vehicle's longitudinal direction, which is not conducive to clearance of the drive shaft 102 of the electric drive assembly 101.

[0476] Furthermore, it should be noted that the distance between the front end of the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101 along the longitudinal direction of the vehicle can be set as L2. L2 can be between 310mm and 330mm, that is, L2 can be 315mm, 319mm or 325mm, etc., to avoid L2 being too large or too small. If it is too large, it will cause the clearance space 51 to have too large a span along the longitudinal direction of the vehicle, resulting in wasted space, or it will cause the front end of the frame longitudinal beam 3 to extend downward too long, which is not conducive to the installation of the rear subframe 100 on the vehicle. If it is too small, it will cause the clearance space 51 to have too small a span along the longitudinal direction of the vehicle, causing the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101 to interfere.

[0477] In some embodiments, the inner wall surface 50 of the clearance space 51 includes a front wall surface 52 and a rear wall surface 53, which are connected to the inner apex of the clearance space 51; wherein the extension length of the front wall surface 52 is greater than the extension length of the rear wall surface 53.

[0478] Specifically, the inner wall 50 of the clearance space 51 is the lower surface of the arch structure 5. The inner wall 50 of the clearance space 51 includes a front wall 52 and a rear wall 53, and the front wall 52 and the rear wall 53 are connected to the inner vertex of the clearance space 51. That is, the front wall 52 is a wall extending forward from the inner vertex of the clearance space 51, and the rear wall 53 is a wall extending backward from the inner vertex of the clearance space 51. The extension length of the front wall 52 is greater than the extension length of the rear wall 53, so that the length of the arch structure 5 extending forward and downward from the vertex is greater than the length extending backward and downward. This also makes the front end of the frame longitudinal beam 3 connected to the arch structure 5 lower than the middle of the frame longitudinal beam 3. This makes it easier for the front end of the frame longitudinal beam 3 to deform to absorb collision energy when the vehicle is involved in a frontal collision, thereby protecting the occupants and improving the safety of the vehicle.

[0479] In some embodiments, both the front wall surface 52 and the rear wall surface 53 are constructed as curved surfaces, and the radius of curvature of the front wall surface 52 is greater than the radius of curvature of the rear wall surface 53.

[0480] Specifically, by constructing both the front wall surface 52 and the rear wall surface 53 as curved surfaces, a smooth transition can be achieved at their connection points, reducing the possibility of fracture due to stress concentration. Furthermore, the radius of curvature of the front wall surface 52 is greater than that of the rear wall surface 53. That is, when both the front wall surface 52 and the rear wall surface 53 are connected to the inner apex of the clearance space 51, the extension length of the front wall surface 52 can be greater than that of the rear wall surface 53. Consequently, the length of the arched structure 5 extending forward and downward from its apex is greater than its length extending backward and downward. This also allows the front end of the frame longitudinal beam 3 connected to the arched structure 5 to be lower than the middle of the frame longitudinal beam 3. This makes it easier for the front end of the frame longitudinal beam 3 to deform and absorb collision energy during a frontal collision, protecting the occupants and improving the vehicle's safety.

[0481] In some embodiments, the front end of the frame longitudinal beam 3 is provided with a front body mounting part 34, and the rear end of the frame longitudinal beam 3 is provided with a rear body mounting part 35. The front body mounting part 34 is lower than the rear body mounting part 35 and both are used to connect to the vehicle body.

[0482] Specifically, both the front body mounting part 34 and the rear body mounting part 35 are used to connect the rear subframe 100 to the vehicle body. The front body mounting part 34 is located at the front end of the frame longitudinal beam 3, and the rear body mounting part 35 is located at the rear end of the frame longitudinal beam 3. Thus, both the front body mounting part 34 and the rear body mounting part 35 are located on the frame longitudinal beam 3. The rear subframe 100 can be installed on the vehicle by connecting the frame longitudinal beam 3 to the vehicle body. There are two frame longitudinal beams 3, that is, there are also two front body mounting parts 34 and two rear body mounting parts 35. The two front body mounting parts 34 and the two rear body mounting parts 35 are spaced apart. Thus, the frame longitudinal beam 3 can be connected to the vehicle body from four positions at the same time through the two front body mounting parts 34 and the two rear body mounting parts 35, which can improve the reliability and stability of the connection between the rear subframe 100 and the vehicle body.

[0483] It should also be noted that, as shown in Figure 26, both the front body mounting part 34 and the rear body mounting part 35 are provided with sleeves 1051. The sleeves 1051 can be welded to the longitudinal beams 3 of the frame to achieve reliable fixation of the sleeves 1051. At the same time, the sleeves 1051 can be connected to the body through connectors to achieve the connection between the rear subframe 100 and the body.

[0484] In some embodiments, the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32, both of which are constructed in a groove shape. The inner plate portion 31 and the outer plate portion 32 are fastened together, and a portion of the inner plate portion 31 and a portion of the outer plate portion 32 together form an arch structure 5.

[0485] Specifically, as shown in Figures 26 and 28, the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32. The inner plate portion 31 is closer to the center of the vehicle, and the outer plate portion 32 is farther away from the center of the vehicle. The inner plate portion 31 and the outer plate portion 32 are distributed along the transverse direction of the vehicle, so that the longitudinal force can be transmitted and dissipated together by the inner plate portion 31 and the outer plate portion 32. Both the inner plate portion 31 and the outer plate portion 32 are constructed as grooves, so that the cross-section of the inner plate portion 31 and the outer plate portion 32 is U-shaped, which can improve the structural strength of the inner plate portion 31 and the outer plate portion 32. At the same time, the inner plate portion 31 and the outer plate portion 32 are fastened together so that the frame longitudinal beam 3 is a whole, which can improve the structural strength and operational reliability of the frame longitudinal beam 3. Furthermore, the structural strength of the frame longitudinal beam 3 can be enhanced by increasing the thickness of the inner plate portion 31 and the outer plate portion 32.

[0486] Furthermore, the frame longitudinal beam 3 includes an inner panel portion 31 and an outer panel portion 32, and part of the frame longitudinal beam 3 is constructed as an arched structure 5. That is, a part of the inner panel portion 31 and a part of the outer panel portion 32 are both constructed to arch upwards, so that a part of the inner panel portion 31 and a part of the outer panel portion 32 can jointly form an arched structure 5. In turn, a clearance space 51 can be formed below the arched structure 5 to avoid interference between the drive shaft 102 of the electric drive assembly 101 and the frame longitudinal beam 3.

[0487] It should be noted that the arch structure 5 can be formed by stamping, and the other parts on the frame longitudinal beam 3 can be formed as one piece. In addition, the inner plate 31 and the outer plate 32 can be welded to the sleeve 1051 along the circumference of the sleeve 1051 to improve the connection reliability between the frame longitudinal beam 3 and the sleeve 1051.

[0488] In some embodiments, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is L6, and satisfies: 125mm≤L6≤145mm; and / or, the height of the arch structure 5 along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm.

[0489] Specifically, part of the frame longitudinal beam 3 is constructed as an arched structure 5. The arched structure 5 is constructed to arch upward relative to the frame longitudinal beam 3 to form a clearance space 51 below the arched structure 5. The front end of the frame longitudinal beam 3 is lower than the middle of the frame longitudinal beam 3. That is, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is greater than the vertical depth of the clearance space 51 in the vehicle, so as to facilitate the setting of the clearance space 51.

[0490] Furthermore, the height difference L6 between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 can be between 125mm and 145mm, that is, L6 can be 130mm, 136mm or 140mm, etc., which can avoid L6 being too large or too small. If it is too large, the extension length of the frame longitudinal beam 3 along the vertical direction of the vehicle will be too large, which will result in a more complex overall structure and greater weight of the rear subframe 100, which is not conducive to the setting of the rear subframe 100, and will also lead to a reduction in the efficiency of longitudinal force transmission. Conversely, if it is too small, the extension length of the frame longitudinal beam 3 along the vertical direction of the vehicle will be too small, which is not conducive to the setting of the clearance space 51.

[0491] By rationally designing the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3, the vertical extension length of the frame longitudinal beam 3 along the vehicle can be minimized while ensuring that the drive shaft 102 of the electric drive assembly 101 does not interfere with the frame longitudinal beam 3. This makes the overall structure of the rear subframe 100 simpler and lighter, which is beneficial for the installation of the rear subframe 100 on the vehicle and can also help improve the efficiency of longitudinal force transmission.

[0492] Furthermore, part of the longitudinal beam 3 of the frame is constructed as an arch structure 5. That is, the arch structure 5, as part of the longitudinal beam 3 of the frame, can be used to bear the weight of the vehicle body. The height of the arch structure 5 along the vertical direction of the vehicle is the height difference between the highest point of the arch structure 5 along the vertical direction of the vehicle and the intersection of the vertical line passing through the highest point and the lowest point of the arch structure 5. This can be used to represent the thickness of the arch structure 5. The height H1 of the arch structure 5 along the vertical direction of the vehicle can be between 70mm and 80mm, that is, H1 can be 72mm, 74mm or 76mm, etc., to avoid H1 being too large or too small. If it is too large, the size of the arch structure 5 will be too large, which will lead to the size of the longitudinal beam 3 of the frame being too large, which is not conducive to the lightweighting of the rear subframe 100 and its installation on the vehicle. If it is too small, the ability of the arch structure 5 to bear the weight of the vehicle body will be reduced, which will lead to a decrease in the reliability of the longitudinal beam 3 of the frame.

[0493] Therefore, by rationally designing the height of the arch structure 5 along the vertical direction of the vehicle, the size of the frame longitudinal beam 3 can be reduced as much as possible while ensuring the ability to bear the weight of the vehicle body. This facilitates the lightweighting of the rear subframe 100 and its installation on the vehicle. Furthermore, the height of the arch structure 5 along the vertical direction of the vehicle can be flexibly set according to the modal, stiffness, and durability performance of the rear subframe 100.

[0494] Furthermore, it should be noted that the clearance space 51 is used to avoid the drive shaft 102 of the electric drive assembly 101. Therefore, the size of the clearance space 51 can be configured to be slightly larger than the motion envelope of the drive shaft 102 of the electric drive assembly 101. This ensures that the drive shaft 102 of the electric drive assembly 101 can maintain a distance from the longitudinal beam 3 of the frame when it moves to its maximum position in any direction, as shown in Figure 27. The longitudinal span of the clearance space 51 can be set to L5, which can be between 130mm and 150mm, i.e., L5 can be 135mm, 141mm, or... The length of the clearance space 51 in the longitudinal direction of the vehicle is 145mm, which avoids the L5 being too large or too small. If it is too large, the distance between the drive shaft 102 of the electric drive assembly 101 and the longitudinal beam 3 of the frame will be too large when it moves to its maximum position along the longitudinal direction of the vehicle. Although this ensures that the drive shaft 102 of the electric drive assembly 101 will not interfere with the longitudinal beam 3 of the frame, it will lead to wasted space and also result in the arch structure 5 being too large, which is not conducive to the installation of the rear subframe 100 on the vehicle. Conversely, if it is too small, the drive shaft 102 of the electric drive assembly 101 will interfere with the longitudinal beam 3 of the frame when it moves along the longitudinal direction of the vehicle. The clearance space 51 in the longitudinal direction of the vehicle is the distance between the horizontal plane where the drive shaft 102 of the electric drive assembly 101 is located in the static state and the two intersection points of the arch structure 5.

[0495] In some embodiments, there are two frame crossbeams 106, and the two frame crossbeams 106 are distributed at intervals along the longitudinal direction of the vehicle. The frame longitudinal beam 3 and at least one of the frame crossbeams 106 are provided with electric drive suspension mounting points 104.

[0496] Specifically, the frame crossbeam 106 is used to transmit and dissipate lateral forces. By constructing two frame crossbeams 106, the lateral forces can be transmitted together by the two frame crossbeams 106, thereby improving the reliability of lateral force transmission and dissipation. Furthermore, by distributing the two frame crossbeams 106 at intervals along the longitudinal direction of the vehicle, a certain distance can be maintained between the two frame crossbeams 106, allowing the two frame crossbeams 106 to transmit lateral forces simultaneously from two different positions, which can further improve the efficiency and reliability of lateral force transmission, enabling rapid transmission and dissipation of lateral forces.

[0497] It should be noted that both frame crossbeams 106 are connected between the two frame longitudinal beams 3, thus forming the basic frame structure of the rear subframe 100 together with the two frame crossbeams 106 and the two frame longitudinal beams 3, thereby improving the structural stability and operational reliability of the rear subframe 100.

[0498] Furthermore, electric drive mount mounting points 104 are provided on the longitudinal beams 3 and at least one of the cross beams 106 of the frame. The electric drive mount mounting points 104 are used to mount the motor. That is, one electric drive mount mounting point 104 is provided on each of the two longitudinal beams 3, and one electric drive mount mounting point 104 is provided on one or two cross beams 106. That is, the number of electric drive mount mounting points 104 is at least three. Thus, the motor mount can be mounted by using at least three electric drive mount mounting points 104 together, which can improve the reliability of the motor mount mounting. Moreover, the at least three electric drive mount mounting points 104 are spaced apart, which can simultaneously mount the motor mount from at least three positions, which can improve the stability of the motor mount mounting.

[0499] For example, as shown in Figures 26 and 28, there are three electric drive mount points 104 on the front of the two frame crossbeams 106. The motor mount can be connected to the rear subframe 100 through the three spaced-apart electric drive mount points 104, which can improve the reliability and stability of the motor mount installation.

[0500] It should be noted that the motor mount can be connected to the electric drive mount mounting point 104 by press fitting, and the motor mount is used to connect the electric drive assembly 101 to the rear subframe 100. This allows the motor mount to be connected to both the rear subframe 100 and the electric drive assembly 101 simultaneously, thereby enabling the installation of the electric drive assembly 101 and ensuring its reliable operation. The connection can be made using connectors, such as bolts, to facilitate the installation or disassembly of various components. Furthermore, the specific positions of the three electric drive mount mounting points 104 on the frame crossbeam 106 and the frame longitudinal beam 3 can be flexibly set according to the arrangement of surrounding components.

[0501] As shown in Figure 27, four control arm mounting brackets 107 are connected to each frame longitudinal beam 3 to fix the control arm. The control arm mounting brackets 107 can be welded to the frame longitudinal beam 3 to improve the reliability of the connection between the two. The control arm is used to connect the vehicle body and the wheel to transfer the force borne by the wheel to the vehicle body for distribution, thereby improving the ride comfort of the vehicle.

[0502] Furthermore, as shown in Figure 28, the width of the longitudinal beam 3 along the vehicle's transverse direction can be set to D7, which can be between 90mm and 110mm, i.e., D7 can be 95mm, 100mm, or 115mm, etc., to avoid D7 being too large or too small. This way, while ensuring the load-bearing capacity of the vehicle body, the structural complexity and weight of the rear subframe 100 can be reduced as much as possible. Moreover, the height of the longitudinal beam 3 along the vehicle's vertical direction can be constructed differently at various points on the longitudinal beam 3, and the transitions at various points on the longitudinal beam 3 can be uniform to reduce the possibility of the longitudinal beam 3 breaking due to stress concentration. The width of the longitudinal beam 3 along the vehicle's transverse direction and the height along the vehicle's vertical direction can be flexibly set according to the welding strength and durability of each welded part, the modal and stiffness of the rear subframe 100, and the arrangement of surrounding components.

[0503] This application also proposes a vehicle.

[0504] The vehicle according to the embodiments of this application includes an electric drive assembly 101 and a rear subframe 100 of any of the above embodiments. The electric drive assembly 101 is connected to the longitudinal beam 3 of the frame and at least one crossbeam 106 of the frame via a motor. The drive shaft 102 of the electric drive assembly 101 passes through the clearance space 51.

[0505] Specifically, the electric drive assembly 101 is connected to the wheel via the drive shaft 102 to drive the wheel. The electric drive assembly 101 is connected to the frame longitudinal beam 3 and at least one frame cross beam 106 via the motor mount. The electric drive assembly 101 can be connected to two frame longitudinal beams 3 via the motor mount, and simultaneously connected to one or two frame cross beams 106. This enables the connection between the electric drive assembly 101 and the rear subframe 100. Furthermore, the drive shaft 102 of the electric drive assembly 101 passes through the clearance space 51, allowing the electric drive assembly 101 to be positioned between the two frame longitudinal beams 3. This allows the drive shaft 102 of the electric drive assembly 101 to pass through the clearance space 51 under the two arched structures 5 formed by the two frame longitudinal beams 3 to connect with the wheel. Thus, when the wheel vibrates, the vibration transmitted to the drive shaft 102 of the electric drive assembly 101 can be transmitted and dissipated through the rear subframe 100, thereby improving the ride comfort of the vehicle.

[0506] The rear subframe 100 according to an embodiment of this application is described below with reference to Figures 29-31. By constructing at least a portion of the frame longitudinal beam 3 as an arched structure 5 to form a clearance space 51, interference between the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101 can be avoided, thereby improving the reliability of the operation of the frame longitudinal beam 3 and the electric drive assembly 101 and improving user satisfaction.

[0507] As shown in Figures 29-31, a rear subframe 100 according to one embodiment of the present application includes: at least one frame crossbeam 106 and two frame longitudinal beams 3.

[0508] Two frame longitudinal beams 3 are distributed laterally along the vehicle, and at least one frame crossbeam 106 is connected between the two frame longitudinal beams 3. At least a portion of the frame longitudinal beams 3 is constructed as an arched structure 5. The arched structure 5 is constructed to arch upward to form a clearance space 51 below the arched structure 5. The clearance space 51 is used to clear the drive shaft 102 of the electric drive assembly 101.

[0509] Specifically, the rear subframe 100 can be used to isolate vibrations and noise from the wheels and road surface, preventing them from being directly transmitted into the passenger compartment, thereby improving the vehicle's ride comfort. The rear subframe 100 includes a frame crossbeam 106 and a frame longitudinal beam 3. The frame crossbeam 106 is configured to extend laterally along the vehicle to transmit and dissipate lateral forces, while the frame longitudinal beam 3 is configured to extend longitudinally along the vehicle to transmit and dissipate longitudinal forces. Moreover, there is at least one frame crossbeam 106, meaning that the number of frame crossbeams 106 can be one, two, or three, etc., to achieve the desired effect through at least one... Each frame crossbeam 106 transmits lateral forces, improving the reliability of lateral force transmission and dissipation. There are two frame longitudinal beams 3, which can transmit longitudinal forces together, improving the reliability of longitudinal force transmission and dissipation. The two frame longitudinal beams 3 are distributed at intervals along the lateral direction of the vehicle, so that there is a certain distance between the two frame longitudinal beams 3. This allows the two frame longitudinal beams 3 to transmit longitudinal forces from two different positions at the same time, which can further improve the efficiency and reliability of longitudinal force transmission, and quickly transmit and dissipate longitudinal forces.

[0510] It should be noted that both the frame crossbeam 106 and the frame longitudinal beam 3 can be constructed as tubular structures to reduce the weight of the frame crossbeam 106 and the frame longitudinal beam 3 while ensuring that lateral and longitudinal forces can be transmitted and dissipated respectively. This reduces the overall weight of the rear subframe 100 and facilitates its installation on the vehicle.

[0511] Furthermore, by connecting at least one frame crossbeam 106 between two frame longitudinal beams 3, both ends of at least one frame crossbeam 106 can be simultaneously connected to the two frame longitudinal beams 3, so that at least one frame crossbeam 106 and the two frame longitudinal beams 3 can together form the basic frame structure of the rear subframe 100. Moreover, the frame crossbeam 106 and the frame longitudinal beams 3 can be connected by welding, making the rear subframe 100 a whole, which can improve the structural stability and operational reliability of the rear subframe 100. In addition, by connecting the frame crossbeam 106 and the frame longitudinal beams 3, the frame crossbeam 106 and the frame longitudinal beams 3 can jointly transmit and dissipate lateral and longitudinal forces, which can further improve the reliability and efficiency of transmitting and dissipating lateral and longitudinal forces, thereby effectively improving the ride comfort of the vehicle and helping to improve user satisfaction.

[0512] Furthermore, by constructing at least a portion of the frame longitudinal beam 3 as an arched structure 5, or by constructing part or all of the frame longitudinal beam 3 as an arched structure 5, the shape of the frame longitudinal beam 3 can be changed so that the frame longitudinal beam 3 can avoid interference with the drive shaft 102 of the electric drive assembly 101 at the arched structure 5, thereby avoiding reduced reliability of their operation. Moreover, by constructing the arched structure 5 as an upward arch, the arched structure 5 can be constructed as a bridge, forming a clearance space 51 below the arched structure 5. The clearance space 51 is used to avoid interference with the drive shaft 102 of the electric drive assembly 101, thereby avoiding interference between the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101, thereby improving the reliability of the operation of the frame longitudinal beam 3 and the electric drive assembly 101.

[0513] According to the embodiments of this application, the rear subframe 100, by connecting the frame crossbeam 106 and the frame longitudinal beam 3, allows the frame crossbeam 106 and the frame longitudinal beam 3 to jointly transmit and dissipate lateral and longitudinal forces, thereby improving the vehicle's ride comfort and enhancing the structural stability and operational reliability of the rear subframe 100. Furthermore, by constructing at least a portion of the frame longitudinal beam 3 as an arched structure 5 to form a clearance space 51, interference between the frame longitudinal beam 3 and the drive shaft 102 of the electric drive assembly 101 can be avoided, thereby improving the operational reliability of the frame longitudinal beam 3 and the electric drive assembly 101 and enhancing user satisfaction.

[0514] In some embodiments, the clearance space 51 has a longitudinal span of L5 and satisfies: 130mm≤L5≤150mm; and / or, the clearance space 51 has a longitudinal depth of L7 and satisfies: 75mm≤L7≤90mm.

[0515] Specifically, the clearance space 51 is used to avoid the drive shaft 102 of the electric drive assembly 101. The size of the clearance space 51 is designed to be slightly larger than the motion envelope of the drive shaft 102 of the electric drive assembly 101. This ensures that the drive shaft 102 of the electric drive assembly 101 can maintain a distance from the frame longitudinal beam 3 when it moves to its maximum position in any direction. It also avoids the arch structure 5 from being too large due to the clearance space 51, which would be detrimental to the installation of the rear subframe 100 on the vehicle. Thus, by reasonably designing the size of the clearance space 51, the size of the rear subframe 100 can be minimized while ensuring that the drive shaft 102 of the electric drive assembly 101 does not interfere with the frame longitudinal beam 3, so as to facilitate the installation of the rear subframe 100 on the vehicle.

[0516] Furthermore, the clearance space 51 can be positioned between 130mm and 150mm in the longitudinal direction of the vehicle, i.e., L5 can be 135mm, 141mm, or 145mm, etc. This avoids L5 being too large or too small. If it is too large, the distance between the drive shaft 102 of the electric drive assembly 101 and the frame longitudinal beam 3 will be too large when the electric drive assembly 101 moves to its maximum position in the longitudinal direction of the vehicle. Although this can ensure that the drive shaft 102 of the electric drive assembly 101 will not interfere with the frame longitudinal beam 3, it will lead to wasted space and also result in the arch structure 5 being too large, which is not conducive to the installation of the rear subframe 100 on the vehicle. Conversely, if it is too small, the drive shaft 102 of the electric drive assembly 101 will interfere with the frame longitudinal beam 3 when it moves in the longitudinal direction of the vehicle, which will reduce the reliability of the frame longitudinal beam 3 and the electric drive assembly 101.

[0517] It should be noted that the longitudinal span of the clearance space 51 in the vehicle is the distance between the horizontal plane where the drive shaft 102 of the electric drive assembly 101 is located in a stationary state and the two intersection points of the arch structure 5.

[0518] Meanwhile, the clearance space 51 can be positioned between 75mm and 90mm in the vertical direction of the vehicle, i.e., L7 can be 78mm, 82mm, or 86mm, etc. This avoids L7 being too large or too small. If it is too large, the distance between the drive shaft 102 of the electric drive assembly 101 and the frame longitudinal beam 3 will be too large when the electric drive assembly 101 moves to its maximum position vertically along the vehicle. Although this can ensure that the drive shaft 102 of the electric drive assembly 101 will not interfere with the frame longitudinal beam 3, it will lead to wasted space and also result in the arch structure 5 being too large, which is not conducive to the installation of the rear subframe 100 on the vehicle. Conversely, if it is too small, the drive shaft 102 of the electric drive assembly 101 will interfere with the frame longitudinal beam 3 when it moves vertically along the vehicle, which will reduce the reliability of the frame longitudinal beam 3 and the electric drive assembly 101.

[0519] It should be noted that the vertical depth of the clearance space 51 in the vehicle is the height difference between the highest point of the clearance space 51 and the lowest point of the middle of the longitudinal beam 3 of the frame.

[0520] Furthermore, it should be noted that the distance between the drive shaft 102 of the electric drive assembly 101 and the highest point of the clearance space 51 in a stationary state can be set to L1. L1 can be between 12mm and 13.5mm, that is, L1 can be 12.5mm, 12.7mm or 13mm, etc., to avoid L1 being too large or too small. This ensures that when the drive shaft 102 of the electric drive assembly 101 moves to its maximum position along the vertical direction of the vehicle, there is still a certain distance between it and the highest point of the clearance space 51, so as to avoid interference between the drive shaft 102 of the electric drive assembly 101 and the longitudinal beam 3 of the frame, and also to avoid wasting space.

[0521] In some embodiments, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is L6, and satisfies: 125mm≤L6≤145mm.

[0522] Specifically, at least a portion of the frame longitudinal beam 3 is constructed as an arched structure 5, which is constructed to arch upward relative to the frame longitudinal beam 3 to form a clearance space 51 below the arched structure 5. The front end of the frame longitudinal beam 3 is lower than the middle of the frame longitudinal beam 3. That is, the height difference between the highest point of the clearance space 51 and the front end of the frame longitudinal beam 3 is greater than the height difference between the highest point of the clearance space 51 and the lowest point of the middle of the frame longitudinal beam 3. In other words, the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is greater than the vertical depth of the clearance space 51 in the vehicle, so as to facilitate the setting of the clearance space 51.

[0523] Furthermore, the height difference L2 between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is between 125mm and 145mm, that is, L6 can be 130mm, 136mm or 140mm, etc., which can avoid L6 being too large or too small. If it is too large, the extension length of the frame longitudinal beam 3 along the vertical direction of the vehicle will be too large, which will result in a more complex overall structure and greater weight of the rear subframe 100, which is not conducive to the setting of the rear subframe 100, and will also reduce the efficiency of longitudinal force transmission. Conversely, if it is too small, the extension length of the frame longitudinal beam 3 along the vertical direction of the vehicle will be too small, which is not conducive to the setting of the clearance space 51.

[0524] By rationally designing the height difference between the highest point of the clearance space 51 and the lowest point of the front end of the frame longitudinal beam 3, the vertical extension length of the frame longitudinal beam 3 along the vehicle can be minimized while ensuring that the drive shaft 102 of the electric drive assembly 101 does not interfere with the frame longitudinal beam 3. This makes the overall structure of the rear subframe 100 simpler and lighter, which is beneficial for the installation of the rear subframe 100 on the vehicle and can also help improve the efficiency of longitudinal force transmission.

[0525] In some embodiments, the height of the arch structure 5 along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm.

[0526] Specifically, at least a portion of the frame longitudinal beam 3 is constructed as an arch structure 5. That is, the arch structure 5, as at least a part of the frame longitudinal beam 3, can be used to bear the weight of the vehicle body. The height of the arch structure 5 along the vertical direction of the vehicle is the height difference between the highest point of the arch structure 5 along the vertical direction of the vehicle and the intersection of the vertical line passing through the highest point and the lowest point of the arch structure 5. This can be used to represent the thickness of the arch structure 5. The height H1 of the arch structure 5 along the vertical direction of the vehicle can be between 70mm and 80mm, that is, H1 can be 72mm, 74mm or 76mm, etc., to avoid H1 being too large or too small. If it is too large, the size of the arch structure 5 will be too large, which will in turn lead to the size of the frame longitudinal beam 3 being too large, which is not conducive to the lightweighting of the rear subframe 100 and its installation on the vehicle. If it is too small, the ability of the arch structure 5 to bear the weight of the vehicle body will be reduced, which will in turn lead to a decrease in the reliability of the frame longitudinal beam 3.

[0527] Therefore, by rationally designing the height of the arch structure 5 along the vertical direction of the vehicle, the size of the frame longitudinal beam 3 can be reduced as much as possible while ensuring the ability to bear the weight of the vehicle body. This facilitates the lightweighting of the rear subframe 100 and its installation on the vehicle. Furthermore, the height of the arch structure 5 along the vertical direction of the vehicle can be flexibly set according to the modal, stiffness, and durability performance of the rear subframe 100.

[0528] In some embodiments, there are two frame crossbeams 106, and the two frame crossbeams 106 are distributed at intervals along the longitudinal direction of the vehicle. The frame longitudinal beam 3 and at least one of the frame crossbeams 106 are provided with electric drive suspension mounting points 104.

[0529] Specifically, the frame crossbeam 106 is used to transmit and dissipate lateral forces. By constructing two frame crossbeams 106, the lateral forces can be transmitted together by the two frame crossbeams 106, thereby improving the reliability of lateral force transmission and dissipation. Furthermore, by distributing the two frame crossbeams 106 at intervals along the longitudinal direction of the vehicle, a certain distance can be maintained between the two frame crossbeams 106, allowing the two frame crossbeams 106 to transmit lateral forces simultaneously from two different positions, which can further improve the efficiency and reliability of lateral force transmission, enabling rapid transmission and dissipation of lateral forces.

[0530] It should be noted that both frame crossbeams 106 are connected between the two frame longitudinal beams 3, thus forming the basic frame structure of the rear subframe 100 together with the two frame crossbeams 106 and the two frame longitudinal beams 3, thereby improving the structural stability and operational reliability of the rear subframe 100.

[0531] Furthermore, electric drive mount mounting points 104 are provided on the longitudinal beams 3 and at least one of the cross beams 106 of the frame. The electric drive mount mounting points 104 are used to mount the motor. That is, one electric drive mount mounting point 104 can be set on each of the two longitudinal beams 3, and one electric drive mount mounting point 104 can be set on one or two cross beams 106 of the frame. That is, the number of electric drive mount mounting points 104 is at least three. Thus, the motor mount can be mounted by the joint installation of the motor mount through the at least three electric drive mount mounting points 104, which can improve the reliability of the motor mount installation. Moreover, the at least three electric drive mount mounting points 104 are spaced apart, which can simultaneously install the motor mount from at least three positions, which can improve the stability of the motor mount installation.

[0532] It should be noted that the motor mount can be connected to the electric drive mount mounting point 104 by press fitting, and the motor mount is used to connect the electric drive assembly 101 to the rear subframe 100. This allows the motor mount to be connected to both the rear subframe 100 and the electric drive assembly 101 simultaneously, thereby enabling the installation of the electric drive assembly 101 and ensuring its reliable operation. Furthermore, the connection can be made using connectors, such as bolts, to facilitate the installation or disassembly of various components.

[0533] In some embodiments, one of the two frame crossbeams 106 located on the front side is provided with a front electric drive mount point 11, and the frame longitudinal beam 3 is provided with a rear electric drive mount point 33. The arch structure 5 is located between the front electric drive mount point 11 and the rear electric drive mount point 33.

[0534] Specifically, a front electric drive mount mounting point 11 is provided on the front of one of the two frame crossbeams 106, meaning there is one front electric drive mount mounting point 11. Two rear electric drive mount mounting points 33 are provided on the frame longitudinal beam 3. The motor mount can be installed using both the front electric drive mount mounting point 11 and the two rear electric drive mount mounting points 33, improving the reliability and stability of the motor mount installation. Furthermore, at least a portion of the motor mount can be located between the front electric drive mount mounting point 11 and the rear electric drive mount mounting points 33. At least a portion of the electric drive assembly 101 connected to the motor mount can also be located between the front electric drive mount mounting point 11 and the rear electric drive mount mounting point 33. By setting the arch structure 5 between the front electric drive mount mounting point 11 and the rear electric drive mount mounting point 33, the clearance space 51 located below the arch structure 5 is directly opposite to at least a portion of the electric drive assembly 101, so that the drive shaft 102 of the electric drive assembly 101 can pass through the clearance space 51. This avoids interference between the drive shaft 102 of the electric drive assembly 101 and the frame longitudinal beam 3, ensuring the reliability of the operation of the electric drive assembly 101 and the frame longitudinal beam 3.

[0535] In some embodiments, the front electric drive mounting point 11 and the rear electric drive mounting points 33 of the two frame longitudinal beams 3 are distributed in an isosceles triangle.

[0536] Specifically, the front electric drive mount 11 is located on one of the two frame crossbeams 106 on the front side, and the two rear electric drive mount 33 are respectively located on the two frame longitudinal beams 3. That is, the front electric drive mount 11 and the two rear electric drive mount 33 are distributed at intervals, forming an isosceles triangle. This allows the front electric drive mount 11 to be located in the middle of the frame crossbeam 106, and the two rear electric drive mount 33 to be symmetrically distributed relative to the front electric drive mount 11. By using the three electric drive mount 104 distributed in an isosceles triangle to install the motor mount, unnecessary displacement or deformation can be reduced, thus achieving reliable installation of the motor mount and effectively improving the reliability of the motor mount operation.

[0537] In some embodiments, the arch structure 5 is located between the front end and the middle of the frame longitudinal beam 3; and / or, the height of the middle of the frame longitudinal beam 3 along the vertical direction of the vehicle is L9, and satisfies: 100mm≤L9≤110mm; and / or, the height of the rear end of the frame longitudinal beam 3 along the vertical direction of the vehicle is L8, and satisfies: 80mm≤L8≤85mm.

[0538] Specifically, by placing the arched structure 5 between the front end and the middle of the longitudinal beam 3, a portion of the longitudinal beam 3 can be constructed as an arched structure 5, reducing manufacturing difficulty and decreasing the vertical height of the longitudinal beam 3 along the vehicle, which facilitates the installation of the rear subframe 100 on the vehicle. As shown in Figure 30, the vertical height L9 of the middle section of the longitudinal beam 3 along the vehicle can be between 100mm and 110mm, i.e., L9 can be 104mm, 106mm, or 108mm, etc., and the vertical height L8 of the rear end of the longitudinal beam 3 along the vehicle can be between... The height of the rear subframe 100 should be between 80mm and 85mm, i.e., L8 can be 82mm, 83mm, or 84mm, to avoid the height of various parts of the frame longitudinal beam 3 along the vertical direction of the vehicle being too large or too small. If it is too large, it will lead to a complex structure and heavy weight of the rear subframe 100, which is not conducive to the setting of the rear subframe 100. If it is too small, it will reduce the load-bearing capacity of the vehicle body. Therefore, by reasonably designing the height of various parts of the frame longitudinal beam 3 along the vertical direction of the vehicle, the structural complexity and weight of the rear subframe 100 can be reduced as much as possible while ensuring the load-bearing capacity of the vehicle body.

[0539] It should be noted that the height of the longitudinal beam 3 along the vertical direction of the vehicle is not exactly the same at different points. This allows for a smooth transition at different points on the longitudinal beam 3, reducing the possibility of the longitudinal beam 3 breaking due to stress concentration.

[0540] Furthermore, as shown in Figure 31, the width of the longitudinal beam 3 along the transverse direction of the vehicle can be set to D7, which can be between 90mm and 110mm, i.e., D7 can be 95mm, 100mm or 115mm, etc., to avoid D7 being too large or too small. This way, while ensuring the load-bearing capacity of the vehicle body, the structural complexity and weight of the rear subframe 100 can be reduced as much as possible. The width of the longitudinal beam 3 along the transverse direction of the vehicle can be flexibly set according to the welding strength and durability of each welded part, the modal and stiffness requirements of the rear subframe 100, etc.

[0541] In some embodiments, the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32, both of which are constructed in a groove shape. The inner plate portion 31 and the outer plate portion 32 are fastened together, and a portion of the inner plate portion 31 and a portion of the outer plate portion 32 together form an arch structure 5.

[0542] Specifically, as shown in Figures 29 and 31, the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32. The inner plate portion 31 is closer to the center of the vehicle, and the outer plate portion 32 is farther away from the center of the vehicle. The inner plate portion 31 and the outer plate portion 32 are distributed along the transverse direction of the vehicle, so that the longitudinal force can be transmitted and dissipated together by the inner plate portion 31 and the outer plate portion 32. Both the inner plate portion 31 and the outer plate portion 32 are constructed as grooves, so that the cross-section of the inner plate portion 31 and the outer plate portion 32 is U-shaped, which can improve the structural strength of the inner plate portion 31 and the outer plate portion 32. At the same time, the inner plate portion 31 and the outer plate portion 32 are fastened together so that the frame longitudinal beam 3 is a whole, which can improve the structural strength and operational reliability of the frame longitudinal beam 3. Furthermore, the structural strength of the frame longitudinal beam 3 can be enhanced by increasing the thickness of the inner plate portion 31 and the outer plate portion 32.

[0543] Furthermore, the frame longitudinal beam 3 includes an inner panel portion 31 and an outer panel portion 32, and part of the frame longitudinal beam 3 is constructed as an arched structure 5. That is, a part of the inner panel portion 31 and a part of the outer panel portion 32 are both constructed to arch upwards, so that a part of the inner panel portion 31 and a part of the outer panel portion 32 can jointly form an arched structure 5. In turn, a clearance space 51 can be formed below the arched structure 5 to avoid interference between the drive shaft 102 of the electric drive assembly 101 and the frame longitudinal beam 3.

[0544] It should be noted that the arch structure 5 can be formed by stamping, while the other parts on the longitudinal beam 3 of the frame can be formed as a single piece.

[0545] Furthermore, it should be noted that, as shown in Figure 29, four control arm mounting brackets 107 are connected to each frame longitudinal beam 3 to fix the control arms. The control arm mounting brackets 107 can be welded to the frame longitudinal beam 3 to improve the reliability of the connection between the two. The control arms are used to connect the vehicle body and the wheels to distribute the force borne by the wheels to the vehicle body, thereby improving the ride comfort of the vehicle. A front body mounting part 34 and a rear body mounting part 35 are respectively provided at the front and rear ends of the frame longitudinal beam 3. The front body mounting part 34 and the rear body mounting part 35 are respectively provided with sleeves 1051. The inner panel part 31 and the outer panel part 32 can be welded to the sleeve 1051 along the circumference of the sleeve 1051 to achieve reliable fixation of the sleeve 1051. At the same time, the sleeve 1051 can be connected to the vehicle body through the connector, thereby realizing the connection between the rear subframe 100 and the vehicle body.

[0546] This application also proposes a vehicle.

[0547] The vehicle according to the embodiments of this application includes an electric drive assembly 101 and a rear subframe 100 of any of the above embodiments. The electric drive assembly 101 is connected to the longitudinal beam 3 of the frame and at least one crossbeam 106 of the frame via a motor. The drive shaft 102 of the electric drive assembly 101 passes through the clearance space 51.

[0548] Specifically, the electric drive assembly 101 is connected to the wheel via the drive shaft 102 to drive the wheel. The electric drive assembly 101 is connected to the frame longitudinal beam 3 and at least one frame cross beam 106 via the motor mount. The electric drive assembly 101 can be connected to two frame longitudinal beams 3 via the motor mount, and simultaneously connected to one or two frame cross beams 106. This enables the connection between the electric drive assembly 101 and the rear subframe 100. Furthermore, the drive shaft 102 of the electric drive assembly 101 passes through the clearance space 51, allowing the electric drive assembly 101 to be positioned between the two frame longitudinal beams 3. This allows the drive shaft 102 of the electric drive assembly 101 to pass through the clearance space 51 under the two arched structures 5 formed by the two frame longitudinal beams 3 to connect with the wheel. Thus, when the wheel vibrates, the vibration transmitted to the drive shaft 102 of the electric drive assembly 101 can be transmitted and dissipated through the rear subframe 100, thereby improving the ride comfort of the vehicle.

[0549] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0550] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A rear subframe assembly (100), wherein, include: A subframe (100) includes a front crossbeam (1), a rear crossbeam (2), and two frame longitudinal beams (3). The front crossbeam (1) and the rear crossbeam (2) are spaced apart along the longitudinal direction of the vehicle. At least a portion of each frame longitudinal beam (3) is constructed as an arched structure (5). The arched structure (5) arches upward to form a clearance space (51) below the arched structure (5). The clearance space (51) is used to clear the drive shaft (102) of the electric drive assembly (101).

2. The rear subframe assembly (100) according to claim 1, wherein, The rear crossbeam (2) is formed with a steering gear clearance hole (20), which is used to avoid the steering gear (103); It also includes an electric drive assembly (101), wherein the front crossbeam (1) and the rear crossbeam (2) are distributed longitudinally along the vehicle and are respectively connected between the two frame longitudinal beams (3) to jointly define the electric drive housing space (6). The electric drive assembly (101) is installed in the electric drive housing space (6), and the electric drive assembly (101) is poweredly connected to a drive shaft (102). The drive shaft (102) extends from the clearance space (51) to the outside of the electric drive housing space (6).

3. The rear subframe assembly (100) of any of claims 1-2, wherein, The steering clearance hole (20) extends through the rear crossbeam (2) in the front-rear direction, and at least a portion of the steering gear (103) is placed within the steering clearance hole (20).

4. The rear subframe assembly (100) of any of claims 1-3, wherein, The rear crossbeam (2) is provided with a plurality of steering gear mounting points (23), the plurality of steering gear mounting points (23) are used to mount the steering gear (103), and the plurality of steering gear mounting points (23) are spaced apart around the steering gear clearance hole (20); And / or, the distance between the outer wall of the portion of the steering gear (103) placed in the steering gear clearance hole (20) and the inner wall of the steering gear clearance hole (20) is set as A, and satisfies: 4mm≤A≤6mm.

5. The rear subframe assembly (100) of any of claims 2-4, wherein, At least a portion of the steering gear (103) is located on the rear side of the rear crossbeam (2), and the rear sidewall of the rear crossbeam (2) is formed with a clearance groove (24), which communicates laterally with the steering gear clearance hole (20) along the vehicle. The steering gear (103) is provided with a steering gear fork (1031), and the clearance groove (24) is used to avoid the steering gear fork (1031).

6. The rear subframe assembly (100) of claim 5, wherein, The avoidance groove (24) is provided as two, and the two avoidance grooves (24) are respectively connected to both sides of the steering gear avoidance hole (20) along the lateral direction of the vehicle. Both avoidance grooves (24) are constructed as arc grooves, and the radii of the two avoidance grooves (24) are respectively set as R1 and R2, and satisfy: 30mm≤R1≤40mm, 40mm≤R2≤50mm.

7. The rear subframe assembly (100) of any of claims 2-6, wherein, The width of the steering gear clearance hole (20) is set to D1, and satisfies: 270mm≤D1≤280mm; And / or, the maximum distance between the upper and lower walls of the steering gear clearance hole (20) is set to D2, and satisfies: 140mm≤D2≤150mm; And / or, the minimum distance between the upper and lower walls of the steering gear clearance hole (20) is set to D3, and satisfies: 110mm≤D3≤130mm.

8. The rear subframe assembly (100) of any of claims 1-7, wherein, The thickness of the rear crossbeam (2) along the front-rear direction of the vehicle is set to D4, and satisfies: 60mm≤D4≤80mm; And / or, the maximum height of the rear crossbeam (2) is set to D5, and satisfies: 220mm≤D5≤240mm.

9. The rear subframe assembly (100) of any of claims 1-8, wherein, One end of the rear crossbeam (2) is also provided with a clearance notch (22), which is adapted to pass through in the front-rear direction and is used to avoid the exhaust pipe of the engine.

10. The rear subframe assembly (100) of claim 9, wherein, The clearance opening (22) is set to open downwards, and the distance between the upper wall of the clearance opening (22) and the upper wall of the rear crossbeam (2) is set to D6, and satisfies: 160mm≤D6≤180mm; And / or, the rear crossbeam (2) is constructed as a single piece.

11. The rear subframe assembly (100) of any of claims 1-10, wherein, The electric drive assembly (101) is powered by two drive shafts (102), both of which extend laterally along the vehicle and are respectively inserted into the clearance space (51) of the two frame longitudinal beams (3).

12. The rear subframe assembly (100) of any of claims 1-11, wherein, The front crossbeam (1) is provided with a front electric drive mounting point (11), and each of the frame longitudinal beams (3) is provided with a rear electric drive mounting point (33). The arch structure (5) is located between the rear electric drive mounting point (33) and the front crossbeam (1). The front electric drive mounting point (11) and the rear electric drive mounting points (33) of the two frame longitudinal beams (3) are all used to install the electric drive assembly (101).

13. The rear subframe assembly (100) of claim 12, wherein, The rear electric drive mounting points (33) of the two frame longitudinal beams (3) are directly opposite each other along the vehicle's transverse direction, and the front electric drive mounting point (11) and the rear electric drive mounting points (33) of the two frame longitudinal beams (3) are distributed in an isosceles triangle.

14. The rear subframe assembly (100) of claim 13, wherein, The distance between the rear electric drive mounting point (33) and the rear crossbeam (2) is less than the distance between the rear electric drive mounting point (33) and the front crossbeam (1).

15. The rear subframe assembly (100) of any of claims 1-14, wherein, The distance between the top of the drive shaft (102) and the inner top wall of the clearance space (51) is L1, and satisfies: 10mm≤L1≤15mm.

16. The rear subframe assembly (100) of claim 15, wherein, The front end of the longitudinal beam (3) of the frame is provided with a front body mounting part (34), and the rear end of the longitudinal beam (3) of the frame is provided with a rear body mounting part (35). The distance between the center of the drive shaft (102) and the front vehicle mounting part (34) is L2, and satisfies: 310mm≤L2≤330mm. The distance between the center of the drive shaft (102) and the rear vehicle mounting part (35) is L3, and satisfies: 460mm≤L3≤480mm.

17. The rear subframe assembly (100) of claim 16, wherein, The arched structure (5) is located between the front body mounting part (34) and the middle part of the frame longitudinal beam (3), and the bottom surface of the front body mounting part (34) and the bottom surface of the middle part of the frame longitudinal beam (3) are both lower than the bottom surface of the rear end of the rear body mounting part (35).

18. The rear subframe assembly (100) according to any one of claims 16-17, wherein, The height difference L4 between the front vehicle mounting part (34) and the rear vehicle mounting part (35) satisfies: 100mm≤L4≤120mm; And / or, the distance between the front vehicle mounting part (34) and the rear vehicle mounting part (35) is d1, and satisfies: 780mm≤d1≤800mm.

19. The rear subframe assembly (100) according to any one of claims 2-18, wherein, The inner wall surface (50) of the avoidance space (51) includes a front wall surface (52) and a rear wall surface (53), which are connected to the inner vertex of the avoidance space (51); The extension length of the front wall surface (52) is greater than the extension length of the rear wall surface (53).

20. The rear subframe assembly (100) according to claim 19, wherein, The electric drive housing (6) includes a front housing (61) and a rear housing (62). The front housing (61) is connected to the front side of the rear housing (62). The front housing (61) is formed between the front sections (30) of the two longitudinal beams (3) of the frame. The rear housing (62) is formed between the rear sections (38) of the two longitudinal beams (3) of the frame. The electric drive assembly (101) includes a reducer (1002) and a drive motor (1001). The front housing (61) is used to accommodate the reducer (1002) and the drive shaft (102). The clearance space (51) is connected to the front housing (61). The rear housing (62) is used to accommodate the drive motor (1001).

21. The rear subframe assembly (100) according to any one of claims 1-20, wherein, The frame longitudinal beam (3) includes an inner plate portion (31) and an outer plate portion (32). Both the inner plate portion (31) and the outer plate portion (32) are constructed as grooves. The inner plate portion (31) and the outer plate portion (32) are fastened together. A portion of the inner plate portion (31) and a portion of the outer plate portion (32) together form the arch structure (5).

22. The rear subframe assembly (100) according to any one of claims 1-21, wherein, The height difference between the highest point of the clearance space (51) and the lowest point of the front end of the frame longitudinal beam (3) is L6, and satisfies: 125mm≤L6≤145mm; And / or, the height of the arch structure (5) along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm.

23. The rear subframe assembly (100) according to any one of claims 1-22, wherein, include: An electric drive assembly (101) is installed in the electric drive housing space (6) and is poweredly connected to a drive shaft (102), which extends from the clearance space (51) to the outside of the electric drive housing space (6).

24. The rear subframe assembly (100) of any of claims 19-23, wherein, Both the front wall surface (52) and the rear wall surface (53) are constructed as curved surfaces, and the radius of curvature of the front wall surface (52) is greater than the radius of curvature of the rear wall surface (53).

25. The rear subframe assembly (100) of claims 19-24, wherein, The distance between the top tangent of the drive shaft (102) and the front wall surface (52) and the rear wall surface (53) is L5, and satisfies: 130mm≤L5≤150mm.

26. The rear subframe assembly (100) of any of claims 23-25, wherein, The frame longitudinal beam (3) has a front upper arm mounting part (401) at the upper front end of the arch structure (5) and a front lower arm mounting part (411) at the lower front end. The front lower arm mounting part (411) is located in front of the front upper arm mounting part (401). The frame longitudinal beam (3) has a rear upper arm mounting part (421) at the upper rear end and a rear lower arm mounting part (433) at the lower rear end. The rear lower arm mounting part (433) is located in front of the rear upper arm mounting part (421).

27. The rear subframe assembly (100) of claim 26, wherein, It also includes a rear lower arm mounting bracket (43), which is located at the bottom of the frame longitudinal beam (3). The rear lower arm mounting bracket (43) includes a plate (431) arranged front and rear and a reinforcing plate (432) located between the two plates (431). The rear lower arm mounting part (433) is provided on the two plates (431).

28. The rear subframe assembly (100) according to any one of claims 26-27, wherein, The rear end of the longitudinal beam (3) of the vehicle frame is also provided with a rear suspension toe bar mounting part. The rear suspension toe bar mounting part is located on the rear side of the rear lower arm mounting part (433). The rear suspension toe bar mounting part is used to install one end of the rear suspension toe bar, and the other end of the rear suspension toe bar is adapted to be connected to the steering knuckle.

29. The rear subframe assembly (100) of claim 28, wherein, The rear crossbeam (2) is also provided with a toe adjustment clearance hole (21) that runs through the front and rear directions. The toe adjustment clearance hole (21) is used to avoid the adjustment tool for adjusting the rear suspension toe rod.

30. The rear subframe assembly (100) of any of claims 23-29, wherein, The cross-sectional height of the longitudinal beam (3) of the frame at the arch structure (5) is less than the cross-sectional height of the rear side of the arch structure (5).

31. The rear subframe assembly (100) of any of claims 23-30, wherein, The rear crossbeam (2) is integrally formed.

32. The rear subframe assembly (100) of any of claims 1-31, wherein, The rear side of the rear crossbeam (2) is provided with a steering gear mounting part (25), and the rear crossbeam (2) forms a rearwardly open steering gear clearance hole (20). The steering gear mounting part (25) is used to install the steering gear (103), and the steering gear clearance hole (20) is used to clear at least a part of the steering gear (103).

33. The rear subframe assembly (100) of claim 32, wherein, At least a portion of the steering gear (103) is located on the rear side of the rear crossbeam (2), and the rear sidewall of the rear crossbeam (2) is formed with a clearance groove (24), which communicates laterally with the steering gear clearance hole (20) along the vehicle. The steering gear (103) is provided with a steering gear fork (1031), and the clearance groove (24) is used to avoid the steering gear fork (1031).

34. The rear subframe assembly (100) of any of claims 32-33, wherein, The steering gear mounting portion (25) is provided in multiple parts, at least some of the steering gear mounting portions (25) are spaced apart on both sides of the height direction of the two clearance slots (24), and at least some of the steering gear mounting portions (25) are spaced apart on both sides of the lateral direction of the steering gear clearance hole (20).

35. The rear subframe assembly (100) of any of claims 32-34, wherein, The rear crossbeam (2) is integrally formed.

36. The rear subframe assembly (100) of any of claims 1-35, wherein, It also includes a rear lower arm mounting bracket (43), which is connected to the bottom of the longitudinal beam (3) of the vehicle frame and the bottom of the rear cross beam (2) respectively, and a hollow reinforcing cavity (611) is formed inside the rear lower arm mounting bracket (43).

37. The rear subframe assembly (100) of claim 36, wherein, The rear lower arm mounting bracket (43) is configured to extend outward from rear to front, and at least a portion of the rear lower arm mounting bracket (43) is located at the bottom of the electric drive housing (6).

38. The rear subframe assembly (100) of claim 37, wherein, The hollow reinforcing cavity (611) is constructed to extend obliquely from back to front, with the rear end of the hollow reinforcing cavity (611) opening toward the rear crossbeam (2) and the front end of the hollow reinforcing cavity (611) opening toward the frame longitudinal beam (3).

39. The rear subframe assembly (100) of any of claims 36-38, wherein, There are two rear lower arm mounting brackets (43), and the two rear lower arm mounting brackets (43) are symmetrically distributed at the bottom of both ends of the rear crossbeam (2).

40. The rear subframe assembly (100) of any of claims 36-39, wherein, It also includes a front upper arm mounting bracket (40) and / or a front lower arm mounting bracket (41), the front upper arm mounting bracket (40) being mounted on the upper side of the end of the front crossbeam (1), and the front lower arm mounting bracket (41) being mounted on the lower side of the end of the front crossbeam (1), the front upper arm mounting bracket (40) and / or the front lower arm mounting bracket (41) being connected to the front end of the frame longitudinal beam (3).

41. The rear subframe assembly (100) of any of claims 36-40, wherein, It also includes a rear upper arm mounting bracket (42), which is mounted on the upper side of the end of the rear crossbeam (2).

42. The rear subframe assembly (100) of any of claims 36-41, wherein, The front crossbeam (1) is a one-piece molded beam; And / or, the rear crossbeam (2) is a one-piece molded beam; And / or, at least a portion of the rear crossbeam (2) is configured to gradually decrease in thickness toward the ends in the vertical direction of the vehicle.

43. The rear subframe assembly (100) of any of claims 36-42, wherein, Each of the frame longitudinal beams (3) is formed with a clearance through hole (36) that runs through the vehicle laterally. The clearance through hole (36) communicates with the electric drive housing space (6) and is used to pass through the drive shaft (102) of the electric drive assembly (101).

44. The rear subframe assembly (100) of any of claims 36-43, wherein, The front crossbeam (1) and at least one of the two frame longitudinal beams (3) are provided with an electric drive suspension mounting point (104).

45. The rear subframe assembly (100) of claim 43, wherein, At least a portion of the frame longitudinal beam (3) is constructed as a through-hole structure (37), which includes an upper arch (371) and a lower arch (372). The upper arch (371) is located above the lower arch (372), and the clearance through-hole (36) is formed between the upper arch (371) and the lower arch (372).

46. The rear subframe assembly (100) of claim 45, wherein, The height of the longitudinal beam (3) of the vehicle frame in the vertical direction is set to gradually decrease from the through structure (37) forward and from the through structure (37) backward.

47. The rear subframe assembly (100) of any of claims 45-46, wherein, The top of the upper arch (371) is higher than the top surface of the frame crossbeam (106); And / or, the bottom of the lower arch (372) is lower than the bottom surface of the frame crossbeam (106).

48. The rear subframe assembly (100) of any of claims 43-47, wherein, The clearance holes (36) of the two frame longitudinal beams (3) are distributed opposite each other in the transverse direction of the vehicle and are symmetrically connected to both sides of the electric drive housing space (6).

49. The rear subframe assembly (100) of any of claims 43-48, wherein, The frame crossbeams (106) are two in number, namely a front crossbeam (1) and a rear crossbeam (2). The front crossbeam (1) and the rear crossbeam (2) are spaced apart in the front-rear direction. The two frame longitudinal beams (3) are spaced apart and connected between the front crossbeam (1) and the rear crossbeam (2) to jointly define the electric drive housing space (6).

50. The rear subframe assembly (100) of claim 49, wherein, The distance between the clearance perforation (36) and the front crossbeam (1) is less than the distance between the clearance perforation (36) and the rear crossbeam (2).

51. The rear subframe assembly (100) according to any one of claims 49-50, wherein, The upper end of the front crossbeam (1) is provided with a front upper arm mounting bracket (40) and the lower end is provided with a front lower arm mounting bracket (41), and the front upper arm mounting bracket (40) and / or the front lower arm mounting bracket (41) are connected to the front end of the frame longitudinal beam (3). And / or, the upper end of the rear crossbeam (2) is provided with a rear upper arm mounting bracket (42) and the lower end is provided with a rear lower arm mounting bracket (43), and the rear upper arm mounting bracket (42) and / or the rear lower arm mounting bracket (43) are connected to the rear end of the frame longitudinal beam (3).

52. The rear subframe assembly (100) according to any one of claims 1-51, wherein, The front sections (30) of the two frame longitudinal beams (3) are symmetrically distributed, and the clearance space (51) of the two frame longitudinal beams (3) is symmetrically connected to both sides of the front receiving space (61).

53. The rear subframe assembly (100) according to claim 52, wherein, The front section (30) of the longitudinal beam also includes a front end structure (301), the rear end of the arch structure (5) is connected to the front end of the rear section (38) of the longitudinal beam, the front end structure (301) is connected to the front end of the arch structure (5), and the front end structure (301) is constructed to be inclined forward and downward relative to the arch structure (5).

54. The rear subframe assembly (100) according to claim 53, wherein, The front end structure (301) is set to be lower than the rear section (38) of the longitudinal beam, and the height difference L8 between the front end of the front end structure (301) and the rear section (38) of the longitudinal beam satisfies: 100mm≤L8≤120mm.

55. The rear subframe assembly (100) according to any one of claims 52-54, wherein, The frame crossbeams (106) are two, namely the front crossbeam (1) and the rear crossbeam (2). The front crossbeam (1) is connected between the front end structures (301) of the two frame longitudinal beams (3), and the rear crossbeam (2) is connected between the rear sections (38) of the two frame longitudinal beams (3).

56. The rear subframe assembly (100) according to claim 55, wherein, The front crossbeam (1) is provided with a front electric drive mounting point (11), and each of the frame longitudinal beams (3) is provided with a rear electric drive mounting point (33) at the connection between the arch structure (5) and the rear section (38) of the longitudinal beam. The front electric drive mounting point (11) and the two rear electric drive mounting points (33) are distributed in an isosceles triangle.

57. The rear subframe assembly (100) according to any one of claims 52-56, wherein, The distance from the center of the clearance space (51) to the front end of the longitudinal beam (30) is L10, and satisfies: 300mm≤L10≤350mm; And / or, the distance from the center of the clearance space (51) to the rear end of the longitudinal beam (38) is L101, and satisfies: 450mm≤L101≤490mm.

58. The rear subframe assembly (100) according to any one of claims 1-57, wherein, The arch structure (5) is constructed such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, and the front end of the frame longitudinal beam (3) is lower than the rear end of the frame longitudinal beam (3).

59. The rear subframe assembly (100) according to claim 58, wherein, The arched structure (5) is located between the front end and the middle of the frame longitudinal beam (3), and the bottom surface of the front end of the frame longitudinal beam (3) and the bottom surface of the middle of the frame longitudinal beam (3) are both lower than the bottom surface of the rear end of the frame longitudinal beam (3).

60. The rear subframe assembly (100) according to any one of claims 58-59, wherein, The height difference L4 between the front end and the rear end of the longitudinal beam (3) of the frame shall satisfy: 100mm≤L4≤120mm; And / or, the distance between the front end of the frame longitudinal beam (3) and the rear end of the frame longitudinal beam (3) is d1, and satisfies: 780mm≤d1≤800mm.

61. The rear subframe assembly (100) according to any one of claims 58-60, wherein, The front end of the frame longitudinal beam (3) is provided with a front body mounting part (34), and the rear end of the frame longitudinal beam (3) is provided with a rear body mounting part (35). The front body mounting part (34) is lower than the rear body mounting part (35) and both are used to connect to the vehicle body.

62. A vehicle, wherein, Includes an electric drive assembly (101) and a rear subframe assembly (100) as described in any one of claims 1-61, wherein the electric drive assembly (101) is connected to the frame longitudinal beam (3) (106) and at least one of the frame cross beams (106) via a motor mount, and the drive shaft (102) of the electric drive assembly (101) passes through the clearance space (51).

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