Rear auxiliary frame assembly and vehicle

Abstract

The rear auxiliary frame assembly comprises an auxiliary frame, a front cross beam and a rear cross beam which are distributed in the longitudinal direction of the vehicle at intervals and connected between two frame longitudinal beams to jointly define an electric drive containing space, at least part of each frame longitudinal beam is of an arch structure, and the arch structures arch upwards; an avoiding space is formed below the arched structure, and a steering gear avoiding hole is formed in the rear cross beam and used for avoiding a steering gear; and the electric drive assembly is installed at the electric drive containing space, the electric drive assembly is in power connection with a drive shaft, and the drive shaft penetrates out of the electric drive containing space from the avoiding space. According to the rear auxiliary frame assembly, the overall integration degree of the rear auxiliary frame assembly can be improved, then the light weight of the whole vehicle can be improved, the endurance performance of the vehicle can be guaranteed, the use experience of a user can be improved, the structural strength and durability of the auxiliary frame can be improved, then the use safety of the rear auxiliary frame assembly can be guaranteed, and the application range is wider.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a rear subframe assembly and a vehicle having the rear subframe assembly. Background Art

[0002] With the development of the national economy and the continuous improvement of living standards, vehicles are becoming more and more important in daily life and travel. The endurance performance and safety performance of vehicles are aspects that need to be considered during vehicle production and manufacturing. The bottom of existing vehicles is mostly equipped with a rear subframe assembly, which is provided with a subframe. The subframe can provide installation points for structures such as drive motors. However, the structural strength and durability of existing subframes are low, resulting in low safety in vehicle use. In addition, the subframe occupies a large space, resulting in poor lightweight of the vehicle, affecting the endurance performance of the vehicle, and further affecting the user experience. There is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a rear subframe assembly with high integration, which can improve the weight of the entire vehicle, thereby ensuring the vehicle's endurance performance, improving the user experience, and improving the structural strength and durability of the subframe to ensure safety in use.

[0004] According to an embodiment of the present invention, the rear subframe assembly includes: a subframe, the subframe includes a front crossbeam, a rear crossbeam and two frame longitudinal beams, the front crossbeam and the rear crossbeam are spaced apart along the longitudinal direction of the vehicle and are respectively connected between the two frame longitudinal beams to jointly define an electric drive accommodating space, at least a portion of each of the frame longitudinal beams is constructed as an arch structure, the arch structure is arched upward to form an avoidance space below the arch structure, the rear crossbeam is formed with a steering gear avoidance hole, and the steering gear avoidance hole is used to avoid the steering gear; an electric drive assembly, the electric drive assembly is installed in the electric drive accommodating space, and the electric drive assembly is dynamically connected to a drive shaft, and the drive shaft is passed from the avoidance space to the outside of the electric drive accommodating space.

[0005] According to the rear sub-frame assembly of the embodiment of the present invention, by providing the electric drive accommodating space, the avoidance space and the steering gear avoidance hole, the overall space occupied by the rear sub-frame assembly can be reduced, so as to improve the overall integration of the rear sub-frame assembly, thereby improving the lightweight of the entire vehicle, ensuring the vehicle endurance performance, and improving the user experience. At least a portion of each frame longitudinal beam is constructed as an arch structure, which can improve the structural strength and durability of the sub-frame, thereby ensuring the safety of the rear sub-frame assembly, and achieving better use effects and a wider range of applications.

[0006] According to the rear subframe assembly of some embodiments of the present invention, the steering gear avoidance hole penetrates the rear cross beam in the front-to-rear direction, and at least a portion of the steering gear is disposed in the steering gear avoidance hole.

[0007] According to the rear subframe assembly of some embodiments of the present invention, the rear cross beam is provided with a plurality of steering gear mounting points, the plurality of steering gear mounting points are used to mount the steering gear, and the plurality of steering gear mounting points are spaced and distributed around the steering gear avoidance hole;

[0008] And / or, the distance between the outer wall of the part of the steering gear placed in the steering gear avoidance hole and the inner wall of the steering gear avoidance hole is set to A, and satisfies: 4mm≤A≤6mm.

[0009] According to the rear subframe assembly of some embodiments of the present invention, at least part of the steering gear is located on the rear side of the rear cross beam, an avoidance groove is formed on the rear side wall of the rear cross beam, the avoidance groove is connected to the steering gear avoidance hole along the transverse direction of the vehicle, the steering gear is provided with a steering gear yoke, and the avoidance groove is used to avoid the steering gear yoke.

[0010] According to the rear subframe assembly of some embodiments of the present invention, there are two avoidance grooves, and the two avoidance grooves are respectively connected to the two sides of the steering gear avoidance hole along the lateral direction of the vehicle, and the two avoidance grooves are both constructed as arc grooves, and the radii of the two avoidance grooves are respectively set to R1 and R2, and satisfy: 30mm≤R1≤40mm, 40mm≤R2≤50mm.

[0011] According to some embodiments of the rear subframe assembly of the present invention, the width of the steering gear avoidance hole is set to D1 and satisfies: 270mm≤D1≤280mm;

[0012] And / or, the maximum distance between the upper wall and the lower wall of the steering gear avoidance hole is set to D2, and satisfies: 140mm≤D2≤150mm;

[0013] And / or, the minimum distance between the upper wall and the lower wall of the steering gear avoidance hole is set to D3, and satisfies: 110mm≤D3≤130mm.

[0014] According to some embodiments of the rear subframe assembly of the present invention, the thickness of the rear cross beam along the front-rear direction of the vehicle is set to D4 and satisfies: 60mm≤D4≤80mm;

[0015] And / or, the maximum height of the rear cross beam is set to D5 and satisfies: 220 mm ≤ D5 ≤ 240 mm.

[0016] According to the rear subframe assembly of some embodiments of the present invention, an avoidance notch is further provided at one end of the rear cross beam, and the avoidance notch is suitable for passing through in the front-to-rear direction and used for avoiding the exhaust pipe of the engine.

[0017] According to some embodiments of the rear subframe assembly of the present invention, the avoidance notch is open downward, and the distance between the upper wall of the avoidance notch and the upper wall of the rear cross beam is set to D6, and satisfies: 160mm≤D6≤180mm;

[0018] And / or, the rear cross beam is constructed as an integral piece.

[0019] According to the rear subframe assembly of some embodiments of the present invention, the electric drive assembly is dynamically connected to the two drive shafts, both of which extend in the transverse direction of the vehicle, and the two drive shafts are respectively and one-to-one arranged in the avoidance spaces of the two frame longitudinal beams.

[0020] According to the rear subframe assembly of some embodiments of the present invention, the front cross beam is provided with a front electric drive suspension mounting point, each of the frame longitudinal beams is provided with a rear electric drive suspension mounting point, the arch structure is located between the rear electric drive suspension mounting point and the front cross beam, and the front electric drive suspension mounting point and the rear electric drive suspension mounting points of the two frame longitudinal beams are all used to install the electric drive assembly.

[0021] According to the rear subframe assembly of some embodiments of the present invention, the rear electric drive suspension mounting points of the two frame longitudinal beams are directly opposite in the transverse direction of the vehicle, and the front electric drive suspension mounting point and the rear electric drive suspension mounting points of the two frame longitudinal beams are distributed in an isosceles triangle.

[0022] According to the rear subframe assembly of some embodiments of the present invention, the distance between the rear electric drive suspension mounting point and the rear cross beam is smaller than the distance between the rear electric drive suspension mounting point and the front cross beam.

[0023] According to the rear subframe assembly of some embodiments of the present invention, the distance between the top of the drive shaft and the inner top wall of the avoidance space is L1, and satisfies: 10mm≤L1≤15mm.

[0024] According to some embodiments of the rear subframe assembly of the present invention, the front end of the frame longitudinal beam is provided with a front vehicle body mounting portion, and the rear end of the frame longitudinal beam is provided with a rear vehicle body mounting portion;

[0025] The distance between the center of the drive shaft and the front vehicle body mounting portion is L2, and satisfies: 310mm≤L2≤330mm; the distance between the center of the drive shaft and the rear vehicle body mounting portion is L3, and satisfies: 460mm≤L3≤480mm.

[0026] According to the rear subframe assembly of some embodiments of the present invention, the arch structure is located between the front body mounting portion and the middle portion of the frame longitudinal beam, and the bottom surface of the front body mounting portion and the bottom surface of the middle portion of the frame longitudinal beam are both lower than the bottom surface of the rear end of the rear body mounting portion.

[0027] According to some embodiments of the rear subframe assembly of the present invention, the height difference L4 between the front vehicle body mounting portion and the rear vehicle body mounting portion satisfies: 100mm≤L4≤120mm;

[0028] And / or, the distance between the front vehicle body mounting portion and the rear vehicle body mounting portion is d1, and satisfies: 780 mm ≤ d1 ≤ 800 mm.

[0029] According to the rear subframe assembly of some embodiments of the present invention, the inner wall surface of the avoidance space includes a front wall surface and a rear wall surface, and the front wall surface and the rear wall surface are connected to the inner vertex of the avoidance space;

[0030] Wherein, the extension length of the front wall surface is greater than the extension length of the rear wall surface.

[0031] According to the rear subframe assembly of some embodiments of the present invention, the electric drive accommodating space includes a front accommodating space and a rear accommodating space, the front accommodating space is connected to the front side of the rear accommodating space, the front accommodating space is formed between the front sections of the two longitudinal beams of the frame, and the rear accommodating space is formed between the rear sections of the two longitudinal beams of the frame, the electric drive assembly includes a reducer and a drive motor, the front accommodating space is used to accommodate the reducer and the drive shaft, the avoidance space is connected to the front accommodating space, and the rear accommodating space is used to accommodate the drive motor.

[0032] According to the rear subframe assembly of some embodiments of the present invention, the frame longitudinal beam includes an inner plate portion and an outer plate portion, the inner plate portion and the outer plate portion are both configured to be groove-shaped, the inner plate portion and the outer plate portion are snap-fitted and press-fitted, and a portion of the inner plate portion and a portion of the outer plate portion together form the arch structure.

[0033] According to some embodiments of the rear subframe assembly of the present invention, the height difference between the highest point of the avoidance space and the lowest point of the front end of the frame longitudinal beam is L6, and satisfies: 125mm≤L6≤145mm;

[0034] And / or, the height of the arch structure along the vertical direction of the vehicle is H1, and satisfies: 70mm≤H1≤80mm.

[0035] The present invention also provides a vehicle.

[0036] A vehicle according to an embodiment of the present invention comprises any one of the above-mentioned rear subframe assemblies.

[0037] The advantages of the vehicle and the above-mentioned rear subframe assembly over the prior art are the same and will not be described in detail here.

[0038] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0040] Figure 1 Schematic diagram of the structure of the subframe according to an embodiment of the present invention Figure 1 ;

[0041] Figure 2 Schematic diagram of the structure of the subframe according to an embodiment of the present invention Figure 2 ;

[0042] Figure 3 Schematic diagram of the structure of the subframe according to an embodiment of the present invention Figure 3 ;

[0043] Figure 4 is a partial cross-sectional view of a subframe according to an embodiment of the present invention;

[0044] Figure 5 Schematic diagram of the structure of the subframe according to an embodiment of the present invention Figure 4 ;

[0045] Figure 6 Schematic diagram of the structure of the subframe according to an embodiment of the present invention Figure 5 ;

[0046] Figure 7 Schematic diagram of the structure of the subframe according to an embodiment of the present invention Figure 6 ;

[0047] Figure 8 2 is a schematic structural diagram of a rear subframe assembly according to an embodiment of the present invention.

[0048] Reference numerals:

[0049] Rear subframe assembly 1000, subframe 100, electric drive assembly 101, drive shaft 102, steering gear 103, steering gear yoke 1031,

[0050] Front cross member 1, front electric drive suspension mounting point 11,

[0051] Rear cross beam 2, steering gear avoidance hole 21, steering gear mounting point 22, avoidance groove 23, avoidance notch 24, toe adjustment avoidance hole 25,

[0052] Frame longitudinal beam 3, inner plate 31, outer plate 32, rear electric drive suspension mounting point 33, front body mounting portion 34, rear body mounting portion 35, front upper arm mounting bracket 40, front upper arm mounting portion 401, front lower arm mounting bracket 41, front lower arm mounting portion 411, rear upper arm mounting bracket 42, rear upper arm mounting portion 421, rear lower arm mounting bracket 43, plate body 431, reinforcement plate 432, rear lower arm mounting portion 433, arch structure 5, avoidance space 51, front wall surface 52, rear wall surface 53,

[0053] Electric drive accommodating space 6, front accommodating space 61, rear accommodating space 62. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0056] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Unless otherwise specified, the front-to-back direction in the present application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0058] Reference below Figure 1-Figure 8 The rear subframe assembly 1000 according to an embodiment of the present invention is described to have a high degree of integration, which can improve the lightweight of the entire vehicle, thereby ensuring the vehicle's endurance performance and improving the user experience. It can also improve the structural strength and durability of the subframe 100 to ensure safety in use.

[0059] like Figure 1-Figure 8 As shown, a rear subframe assembly 1000 according to an embodiment of the present invention includes: a subframe 100 and an electric drive assembly 101 .

[0060] 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 an electric drive accommodating space 6. At least a portion of each frame longitudinal beam 3 is constructed as an arch structure 5, and the arch structure 5 is arched upward to form an avoidance space 51 below the arch structure 5. The rear crossbeam 2 is formed with a steering gear avoidance hole 21, and the steering gear avoidance hole 21 is used to avoid the steering gear 103. The electric drive assembly 101 is installed in the electric drive accommodating space 6, and the electric drive assembly 101 is dynamically connected to a drive shaft 102, and the drive shaft 102 is passed from the avoidance space 51 to the outside of the electric drive accommodating space 6.

[0061] Specifically, the rear subframe assembly 1000 is provided 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, and the subframe 100 is an intermediate component connecting the suspension system and the vehicle body. The axle, the suspension system, etc. can be connected to the main frame through the subframe 100. The subframe 100 can block vibration and noise and reduce their direct entry into the vehicle compartment to improve the comfort and handling of the vehicle. At the same time, it can improve the versatility of the suspension, reduce the R&D and assembly costs, and provide a basis for large-scale production effects.

[0062] The subframe 100 is provided with a front crossbeam 1, a rear crossbeam 2 and two frame longitudinal beams 3. The front crossbeam 1 and the rear crossbeam 2 are both extended in the transverse direction of the vehicle, and the front crossbeam 1 and the rear crossbeam 2 are spaced apart in the longitudinal direction of the vehicle. The front crossbeam 1 is located in front of the rear crossbeam 2. The two frame longitudinal beams 3 are both extended in the front-rear direction of the vehicle, and the two frame longitudinal beams 3 are spaced apart in the transverse direction of the vehicle. The two ends of the front crossbeam 1 are respectively connected to the two frame longitudinal beams 3 by welding or the like. The rear crossbeam 2 The two ends are also connected to the two frame longitudinal beams 3 by welding or the like, so that the front cross beam 1, the rear cross beam 2 and the two frame longitudinal beams 3 can jointly define an electric drive accommodating space 6. The rear sub-frame assembly 1000 is also provided with an electric drive assembly 101, which can provide running power to the wheels, and the electric drive assembly 101 can be installed in the electric drive accommodating space 6 to improve the integration of the rear sub-frame assembly 1000 and make full use of the space at the sub-frame 100.

[0063] Furthermore, at least a portion of each frame longitudinal beam 3 is constructed as an arch structure 5, that is, a portion of each frame longitudinal beam 3 can be constructed as an arch structure 5, or the entirety of each frame longitudinal beam 3 can be constructed as an arch structure 5. In the present embodiment, a portion of each frame longitudinal beam 3 is constructed as an arch structure 5, and the arch structures 5 of two frame longitudinal beams 3 are arranged opposite to each other in the lateral direction of the vehicle to ensure that the left and right sides of the vehicle have the same performance. The arch structures 5 can be arched upward, so that the direction of conduction can be changed when the force is transmitted to the frame longitudinal beam 3, thereby weakening the effect of the force, ensuring the structural strength of each frame longitudinal beam 3, and improving the durability of each frame longitudinal beam 3, so as to improve the safety of use.

[0064] In addition, the arch structure 5 is arched upward, so that an avoidance space 51 is formed under the arch structure 5. The two sides of the electric drive assembly 101 are respectively connected to the drive shaft 102 by power. The drive shaft 102 can be connected to the wheel power so that the electric drive assembly 101 can drive the wheel to rotate. The wheel is located on the outside of the two frame longitudinal beams 3 in the transverse direction of the vehicle, and the drive shaft 102 can be passed from the avoidance space 51 to the outside of the electric drive accommodating space 6, so that the electric drive assembly 101 can drive the wheel in the electric drive accommodating space 6, thereby improving space utilization and ensuring the reliability of vehicle operation.

[0065] The rear sub-frame assembly 1000 is also provided with a steering gear 103, which can control the wheels to adjust the driving direction of the vehicle. The steering gear 103 can be installed at the rear cross beam 2 of the vehicle, and the rear cross beam 2 is provided with a steering gear avoidance hole 21. The steering gear avoidance hole 21 can be used to avoid the steering gear 103, thereby reducing the space occupied by the steering gear 103, so as to further improve the integration of the rear sub-frame assembly 1000, and the steering gear avoidance hole 21 is provided in the rear cross beam 2, which can reduce the weight of the rear cross beam 2, improve the lightweight, ensure the vehicle endurance performance, and improve the user experience.

[0066] According to the rear sub-frame assembly 1000 of the embodiment of the present invention, by providing the electric drive accommodating space 6, the avoidance space 51 and the steering gear avoidance hole 21, the overall space occupied by the rear sub-frame assembly 1000 can be reduced, so as to improve the overall integration of the rear sub-frame assembly 1000, thereby improving the lightweight of the entire vehicle, ensuring the vehicle endurance performance, and improving the user experience. Moreover, 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 sub-frame 100, thereby ensuring the safety of the use of the rear sub-frame assembly 1000, and having a better use effect and a wider range of applications.

[0067] In some embodiments, the steering gear avoidance hole 21 passes through the rear cross beam 2 in the front-to-rear direction, and at least a portion of the steering gear 103 is disposed in the steering gear avoidance hole 21 .

[0068] Specifically, the rear cross beam 2 is provided with a steering gear avoidance hole 21, which can be used to avoid the steering gear 103, and as shown in FIG. Figure 1-Figure 5 As shown, the steering gear avoidance hole 21 is arranged to pass through the rear cross beam 2 in the front-to-back direction, that is, the steering gear avoidance hole 21 is extended in the front-to-back direction, and the front end of the steering gear avoidance hole 21 can be communicated with the electric drive accommodating space 6, and the rear end of the steering gear avoidance hole 21 can be communicated with the rear space of the sub-frame 100. At least a portion of the steering gear 103 is placed in the steering gear avoidance hole 21, that is, only a portion of the steering gear 103 is placed in the steering gear avoidance hole 21, or the entire steering gear 103 is placed in the steering gear avoidance hole 21. In the present embodiment, only a portion of the steering gear 103 is placed in the steering gear avoidance hole 21.

[0069] In this way, the portion of the steering gear 103 along the front-to-rear direction of the vehicle can be placed in the steering gear avoidance hole 21, thereby shortening the space occupied by the rear subframe assembly 1000 along the front-to-rear direction of the vehicle, so as to improve the integration of the rear subframe assembly 1000, and the steering gear avoidance hole 21 is provided in the rear cross beam 2, which can reduce the mass of the rear cross beam 2, and thus reduce the overall weight of the subframe 100, so as to improve the lightweight of the vehicle, extend the vehicle endurance, and improve the user experience.

[0070] In some embodiments, the rear cross beam 2 is provided with a plurality of steering gear mounting points 22 , the plurality of steering gear mounting points 22 are used to mount the steering gear 103 , and the plurality of steering gear mounting points 22 are spaced apart and distributed around the steering gear avoidance hole 21 .

[0071] Specifically, the steering gear 103 can be installed on the rear cross beam 2, and at least a portion of the steering gear 103 can be placed in the steering gear avoidance hole 21 of the rear cross beam 2. Figure 1 As shown, the rear cross beam 2 is also provided with a steering gear mounting point 22, and the steering gear mounting point 22 can be set as a threaded tube. The steering gear 103 can be connected to the steering gear mounting point 22 by bolts, which is easy to install. The steering gear 103 is connected to the rear cross beam 2 by bolts, so that the steering gear 103 can be disassembled relative to the rear cross beam 2, which is convenient for later maintenance and saves maintenance time.

[0072] In addition, the steering gear installation point 22 is set to be multiple, that is, the steering gear installation point 22 can be set to two, three or four, etc. In the present embodiment, the steering gear installation point 22 is set to four, and the multiple steering gear installation points 22 are all used to install the steering gear 103, which can improve the installation reliability of the steering gear 103, and the multiple steering gear installation points 22 are distributed around the steering gear avoidance hole 21 at intervals, so that when part of the steering gear 103 is placed in the steering gear avoidance hole 21, multiple places of the outer peripheral wall of the steering gear 103 can be connected to the rear cross beam 2, so that the force generated by the steering gear 103 can be transmitted to the rear cross beam 2 through bolts located in different directions, so that the force can be dispersed to multiple steering gear installation points 22, thereby weakening the effect, extending the service life, and ensuring the reliability of use.

[0073] In other embodiments, the distance between the outer wall of the portion of the diverter 103 placed in the diverter avoidance hole 21 and the inner wall of the diverter avoidance hole 21 is set to A, and satisfies: 4mm≤A≤6mm.

[0074] Specifically, when the steering gear 103 is installed on the rear cross beam 2, part of the steering gear 103 can be placed in the steering gear avoidance hole 21, and Figure 4 As shown, there is a spacing between the outer wall of the portion of the steering gear 103 placed in the steering gear avoidance hole 21 and the inner wall of the steering gear avoidance hole 21, and the spacing can be set to A, and satisfies: 4mm≤A≤6mm, that is, the spacing A between the outer wall of the portion of the steering gear 103 placed in the steering gear avoidance hole 21 and the inner wall of the steering gear avoidance hole 21 can be set to 4mm, 4.5mm, 5mm, 5.5mm or 6mm, etc. Preferably, in this embodiment, the spacing A between the outer wall of the portion of the steering gear 103 placed in the steering gear avoidance hole 21 and the inner wall of the steering gear avoidance hole 21 is set to 5mm.

[0075] In this way, the distance A between the outer wall of the part of the steering gear 103 placed in the steering gear avoidance hole 21 and the inner wall of the steering gear avoidance hole 21 is set to satisfy: 4mm≤A≤6mm, which can avoid the steering gear avoidance hole 21 from interfering with the movement of the steering gear 103 to ensure the operational reliability of the steering gear 103, and can also avoid the steering gear avoidance hole 21 being too large to affect the structural strength of the rear beam 2, thereby ensuring the reliability of the use of the rear beam 2, and ensuring the durability of the rear beam 2, thereby improving the safety of use.

[0076] In some embodiments, at least part of the steering gear 103 is located on the rear side of the rear cross beam 2, and an avoidance groove 23 is formed on the rear side wall of the rear cross beam 2. The avoidance groove 23 is connected to the steering gear avoidance hole 21 along the transverse direction of the vehicle. The steering gear 103 is provided with a steering gear yoke 1031, and the avoidance groove 23 is used to avoid the steering gear yoke 1031.

[0077] Specifically, the steering gear 103 is mounted on the rear cross beam 2, and as Figure 4 and Figure 8 As shown, at least part of the steering gear 103 is arranged on the rear side of the rear cross beam 2, that is, only part of the steering gear 103 is arranged on the rear side of the rear cross beam 2, or the entire steering gear 103 is arranged on the rear side of the rear cross beam 2. In this embodiment, the rear part of the steering gear 103 is located on the rear side of the rear cross beam 2, and the front part of the steering gear 103 can be placed in the steering gear avoidance hole 21, thereby shortening the overall size of the rear subframe assembly 1000 in the front-to-rear direction of the vehicle, so as to improve integration and weight reduction.

[0078] Furthermore, the rear side wall of the rear cross beam 2 is formed with an avoidance groove 23, the avoidance groove 23 is recessed forward along the front-rear direction of the vehicle at the rear side wall of the rear cross beam 2, and the avoidance groove 23 is open to the rear side of the vehicle, the rear part of the steering gear 103 is located at the rear side of the rear cross beam 2, that is, the avoidance groove 23 is open to the steering gear 103, the steering gear 103 is provided with a steering gear yoke 1031, the steering gear yoke 1031 is provided on one side of the steering gear 103, and the avoidance groove 23 is along the vehicle The avoidance groove 23 is laterally connected to the steering gear avoidance hole 21 and is used for avoiding the steering gear yoke 1031, that is, the front part of the steering gear yoke 1031 can be placed in the avoidance groove 23, and the front part of the steering gear 103 can be placed in the steering gear avoidance hole 21, so as to avoid the steering gear avoidance hole 21 interfering with the movement of the steering gear 103, and avoid the rear side wall of the rear cross beam 2 interfering with the movement of the steering gear yoke 1031, so as to ensure the operational reliability of the steering gear 103.

[0079] In some embodiments, there are two avoidance grooves 23, which are respectively connected to the two sides of the steering gear avoidance hole 21 along the lateral direction of the vehicle, and the two avoidance grooves 23 are both constructed as arc grooves, and the radii of the two avoidance grooves 23 are respectively set to R1 and R2, and satisfy: 30mm≤R1≤40mm, 40mm≤R2≤50mm.

[0080] Specifically, the steering gear 103 is provided with a steering gear yoke 1031, and two steering gear yokes 1031 are provided. The two steering gear yokes 1031 are symmetrically connected to the two sides of the steering gear 103, and are respectively extended to the two sides of the steering gear 103 in the lateral direction. The steering gear yoke 1031 can be connected to the ball pin and the tie rod of the vehicle to transmit the steering torque to the wheel hub to deflect the wheel. The two steering gear yokes 1031 can be respectively connected to the wheel hub power on both sides of the vehicle to control the deflection of the two wheels at the same time to ensure reliability in use.

[0081] Furthermore, if Figure 1 and Figure 3As shown, two avoidance grooves 23 are provided, and the two avoidance grooves 23 are respectively connected to the two sides of the steering gear avoidance hole 21 along the lateral direction of the vehicle, so that at least part of the front part of the two steering gear yokes 1031 can be placed in the corresponding avoidance groove 23, so as to shorten the overall size of the rear subframe assembly 1000 along the front-to-back direction and improve the lightweight. The steering gear yoke 1031 is provided as a cylindrical structure, so that the avoidance groove 23 can be correspondingly constructed as an arc groove, thereby ensuring the reliability of the avoidance of the steering gear yoke 1031.

[0082] In addition, the radii of the two avoidance grooves 23 are respectively set to R1 and R2. Figure 3 As shown, R1 is the radius of the avoidance groove 23 on the left, and R2 is the radius of the avoidance groove 23 on the right, and they satisfy: 30mm≤R1≤40mm, 40mm≤R2≤50mm, that is, the radius R1 of the avoidance groove 23 on the left can be set to 30mm, 32.5mm, 35mm, 37.5mm or 40mm, etc., and the radius R2 of the avoidance groove 23 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 avoidance groove 23 on the left is set to 34.3mm, and the radius R2 of the avoidance groove 23 on the right is set to 47.062mm. In this way, the rear side wall of the rear cross beam 2 can be avoided from interfering with the movement of the steering gear yoke 1031, so as to ensure the operational reliability of the steering gear 103.

[0083] In some embodiments, the width of the steering gear avoidance hole 21 is set to D1 and satisfies: 270 mm ≤ D1 ≤ 280 mm.

[0084] Specifically, the rear cross beam 2 is provided with a steering gear avoidance hole 21, and part of the steering gear 103 can be placed in the steering gear avoidance hole 21, and as shown in FIG. Figure 3 As shown, the width of the steering gear avoidance hole 21 can be set to D1, and satisfies: 270mm≤D1≤280mm, that is, the width D1 of the steering gear avoidance hole 21 can be set to 270mm, 272.5mm, 275mm, 277.5mm or 280mm, etc. Preferably, in this embodiment, the width D1 of the steering gear avoidance hole 21 can be set to 275.5mm. The width D1 of the steering gear avoidance hole 21 is set to satisfy: 270mm≤D1≤280mm, which can ensure that there is a gap between the steering gear 103 and the inner wall of the steering gear avoidance hole 21 in the width direction, thereby avoiding the steering gear avoidance hole 21 from interfering with the lateral movement of the steering gear 103, so as to ensure the operational reliability of the steering gear 103, and avoid the width of the steering gear avoidance hole 21 being too large, affecting the structural strength of the rear cross beam 2, ensuring the reliability of the use of the rear cross beam 2, ensuring the durability of the rear cross beam 2, and improving the safety of use.

[0085] In other embodiments, the maximum distance between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to D2, and satisfies: 140mm≤D2≤150mm.

[0086] Specifically, Figure 1-Figure 3 As shown, the steering gear avoidance hole 21 is arranged on the rear cross beam 2 and penetrates the rear cross beam 2 along the front-rear direction of the vehicle. The steering gear avoidance hole 21 can be set as a special-shaped hole to avoid various parts of the steering gear 103. The maximum distance between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to D2, and the maximum distance D2 between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to satisfy: 140mm≤D2≤150mm, that is, the maximum distance D2 between the upper wall and the lower wall of the steering gear avoidance hole 21 can be set to 140mm, 142.5mm, 145mm, 147.5mm or 150mm, etc. Preferably, in this embodiment, the maximum distance D2 between the upper wall and the lower wall of the steering gear avoidance hole 21 can be set to 145.5mm.

[0087] In other embodiments, the minimum distance between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to D3, and satisfies: 110mm≤D3≤130mm.

[0088] Specifically, the minimum distance between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to D3, and the minimum distance D3 between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to satisfy: 110mm≤D3≤130mm, that is, the minimum distance D3 between the upper wall and the lower wall of the steering gear avoidance hole 21 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 wall and the lower wall of the steering gear avoidance hole 21 can be set to 117.122mm.

[0089] In this way, the maximum distance D2 between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to satisfy: 140mm≤D2≤150mm, and the minimum distance D3 between the upper wall and the lower wall of the steering gear avoidance hole 21 is set to satisfy: 110mm≤D3≤130mm, so that there is a gap between the upper wall of the steering gear avoidance hole 21 and the upper wall of the steering gear 103, and there is a gap between the lower wall of the steering gear avoidance hole 21 and the lower wall of the steering gear 103, thereby avoiding the steering gear avoidance hole 21 from interfering with the vertical movement of the steering gear 103 to ensure the operational reliability of the steering gear 103, and avoiding the height of the steering gear avoidance hole 21 from being too large to affect the structural strength of the rear cross beam 2, thereby ensuring the reliability of the use of the rear cross beam 2, ensuring the durability of the rear cross beam 2, and improving the safety of use.

[0090] In some embodiments, the thickness of the rear cross beam 2 along the front-rear direction of the vehicle is set to D4, and satisfies: 60 mm≤D4≤80 mm.

[0091] Specifically, the rear cross beam 2 is arranged at the rear side of the sub-frame 100, and the two ends are respectively connected to the two frame longitudinal beams 3. The rear cross beam 2 is provided with a steering gear avoidance hole 21. Figure 2 As shown, the thickness of the rear cross beam 2 along the front-to-rear direction of the vehicle is set to D4, and satisfies: 60mm≤D4≤80mm, that is, the thickness D4 of the rear cross beam 2 along the front-to-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 cross beam 2 along the front-to-rear direction of the vehicle can be set to 69mm, that is, the hole depth of the steering gear avoidance hole 21 can be set to be greater than or equal to 60mm and less than or equal to 80mm.

[0092] In this way, the structural strength of the rear cross beam 2 can be ensured, the durability of the rear side of the subframe 100 can be improved, and the space in the steering gear avoidance hole 21 can be increased to increase the volume for accommodating the steering gear 103, thereby improving the integration of the rear subframe assembly 1000 and the weight reduction of the entire vehicle, thereby improving the vehicle's endurance performance.

[0093] In other embodiments, the maximum height of the rear cross beam 2 is set to D5 and satisfies: 220 mm ≤ D5 ≤ 240 mm.

[0094] Specifically, the rear cross beam 2 is arranged at the rear side of the sub-frame 100, and the two ends of the rear cross beam 2 are respectively connected to the two frame longitudinal beams 3, and the rear cross beam 2 is provided with a steering gear avoidance hole 21. Figure 2 As shown, the maximum height of the rear cross beam 2 is set to D5, and satisfies: 220mm≤D5≤240mm, that is, the maximum height D5 of the rear cross beam 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 cross beam 2 can be set to 233.5mm. In this way, when the rear cross beam 2 is provided with a steering gear avoidance hole 21, the structural strength of the rear cross beam 2 can be ensured, and the durability of the rear side of the subframe 100 can be improved.

[0095] In addition, the minimum height of the rear cross beam 2 is located at the end of the rear cross beam 2, that is, the connection between the rear cross beam 2 and the frame longitudinal beam 3. In this embodiment, the minimum height of the rear cross beam 2 is set to 78.366 mm, which can ensure the reliability of the connection between the rear cross beam 2 and the frame longitudinal beam 3 to ensure safety in use.

[0096] In some embodiments, an avoidance notch 24 is further provided at one end of the rear cross beam 2. The avoidance notch 24 is suitable for passing through in the front-to-back direction and is used to avoid the exhaust pipe of the engine.

[0097] Specifically, Figure 1 and Figure 3 As shown, the avoidance notch 24 is arranged at one end of the rear cross beam 2, that is, the avoidance notch 24 is arranged close to the frame longitudinal beam 3, and the avoidance notch 24 is suitable for passing through along the front and rear direction. The exhaust pipe of the engine is extended along the front and rear direction of the vehicle, so that the avoidance notch 24 can avoid the exhaust pipe of the engine to ensure the reliability of vehicle operation.

[0098] The avoidance notch 24 is staggered with the steering gear avoidance hole 21 in the vertical direction, which can ensure the structural strength of the rear cross beam 2 in the vertical direction, and can make the exhaust pipe of the engine and the steering gear 103 separated. The gas discharged from the exhaust pipe of the engine is high-temperature gas. Separating the exhaust pipe of the engine from the steering gear 103 can ensure the operating reliability of the steering gear 103 and extend the service life of the steering gear 103.

[0099] In some embodiments, the avoidance notch 24 is open downward, and the distance between the upper wall of the avoidance notch 24 and the upper wall of the rear cross beam 2 is set to D6, and satisfies: 160mm≤D6≤180mm.

[0100] Specifically, the avoidance notch 24 is arranged on the lower wall of one end of the rear cross beam 2, and the avoidance notch 24 is recessed upward in the lower wall of the rear cross beam 2, and the avoidance notch 24 is open downward, so that the user can place the upper part of the exhaust pipe of the engine into the avoidance notch 24 from the open mouth of the avoidance notch 24, and the installation is convenient. The distance between the upper wall of the avoidance notch 24 and the upper wall of the rear cross beam 2 is set to D6, and satisfies: 160mm≤D6≤180mm, that is, the distance D6 between the upper wall of the avoidance notch 24 and the upper wall of the rear cross beam 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 avoidance notch 24 and the upper wall of the rear cross beam 2 can be set to 170.2mm.

[0101] In this way, the distance D6 between the upper wall of the avoidance notch 24 and the upper wall of the rear cross beam 2 is set to satisfy: 160mm≤D6≤180mm, which can ensure the reliability of avoiding the exhaust pipe of the engine and avoid the opening depth of the avoidance notch 24 being too large, resulting in a low structural strength of the rear cross beam 2. The structural strength and durability of the rear cross beam 2 can be ensured, and the safety of use can be improved.

[0102] In other embodiments, the rear cross beam 2 is constructed as an integral part, and the rear cross beam 2 is connected between two frame longitudinal beams 3. The rear cross beam 2 can be constructed as an integral part, which is easy to manufacture, can improve production efficiency, and can improve the structural strength of the rear cross beam 2.

[0103] In addition, in actual settings, the rear cross beam 2 can be set as a front plate and a rear plate according to production requirements, and the front plate and the rear plate can be welded together to form a complete rear cross beam 2, which can reduce production difficulty and thus reduce production costs.

[0104] In some embodiments, the electric drive assembly 101 is dynamically connected to two drive shafts 102 , both of which extend transversely of the vehicle, and the two drive shafts 102 are respectively and one-to-one arranged in the avoidance spaces 51 of the two frame longitudinal beams 3 .

[0105] Specifically, the electric drive assembly 101 is disposed in the electric drive accommodation space 6, that is, the electric drive assembly 101 is located inside the sub-frame 100, and the electric drive assembly 101 is connected to the drive shaft 102 by power. Figure 8 As shown, there are two drive shafts 102, which are respectively connected to the left and right sides of the electric drive assembly 101 by power, and the two drive shafts 102 are extended in the direction away from each other, and both drive shafts 102 extend in the transverse direction of the vehicle, and the drive shaft 102 can pass through the avoidance space 51 to the outside of the electric drive accommodating space 6, and there are two frame longitudinal beams 3, and the two frame longitudinal beams 3 are respectively formed with arch structures 5, and avoidance spaces 51 are formed under the two arch structures 5.

[0106] In this way, when the electric drive assembly 101 is installed in the electric drive accommodating space 6, the two drive shafts 102 can be respectively and one by one passed through the avoidance spaces 51 of the two frame longitudinal beams 3 to extend to the outside of the sub-frame 100, and then can be respectively connected to the wheel power on both sides to control the rotation of the wheels, so that only one electric drive assembly 101 needs to be set for each of the two wheels, which reduces the installation cost and can improve the lightweight.

[0107] In some embodiments, the front cross beam 1 is provided with a front electric drive suspension mounting point 11, each frame longitudinal beam 3 is provided with a rear electric drive suspension mounting point 33, the arch structure 5 is located between the rear electric drive suspension mounting point 33 and the front cross beam 1, and the front electric drive suspension mounting point 11 and the rear electric drive suspension mounting points 33 of the two frame longitudinal beams 3 are both used to install the electric drive assembly 101.

[0108] Specifically, a front cross beam 1 is provided on the front side of the subframe 100. The front cross beam 1 is extended in the transverse direction of the vehicle, and its two ends are respectively connected to the two frame longitudinal beams 3 by welding or the like. The front cross beam 1 is provided with a front electric drive suspension mounting point 11. The front electric drive suspension mounting point 11 penetrates the front cross beam 1 in the front and rear direction of the vehicle. The front electric drive suspension mounting point 11 can be used to install the motor suspension, and the two frame longitudinal beams 3 are both provided with a rear electric drive suspension mounting point 33. The two rear electric drive suspension mounting points 33 penetrate the corresponding frame longitudinal beams 3 in the left and right direction respectively, and the rear electric drive suspension mounting points 33 are also used to install the motor suspension.

[0109] In this way, the electric drive assembly 101 can be connected to the motor suspension, and the motor suspension can support the electric drive assembly 101 to reduce the static displacement of the electric drive assembly 101, and the motor suspension can 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 entire vehicle and improving user comfort. Setting up multiple motor suspensions can improve installation reliability, and the forces in all directions generated by the electric drive assembly 101 can be reduced by the motor suspension, thereby improving the vibration reduction effect.

[0110] In some embodiments, the rear electric drive suspension mounting points 33 of the two frame longitudinal beams 3 are directly opposite in the transverse direction of the vehicle, and the front electric drive suspension mounting point 11 and the rear electric drive suspension mounting points 33 of the two frame longitudinal beams 3 are distributed in an isosceles triangle.

[0111] Specifically, the two frame longitudinal beams 3 are each provided with a rear electric drive suspension mounting point 33, so that the two sides of the electric drive assembly 101 can be connected to the two frame longitudinal beams 3 through the motor suspension, and the rear electric drive suspension mounting points 33 of the two frame longitudinal beams 3 are directly opposite in the transverse direction of the vehicle, so that the connection points between the electric drive assembly 101 and the two frame longitudinal beams 3 are symmetrically distributed on both sides of the electric drive assembly 101, thereby ensuring the symmetry of the left and right sides when the vehicle is set up, so that the vibrations generated on both sides when the vehicle is running are equal, so as to ensure the vehicle's operating performance, avoid the vehicle from deflecting when driving at high speed, and improve driving stability.

[0112] Furthermore, the front electric drive suspension mounting point 11 is arranged on the front cross beam 1 and is located in the middle of the front cross beam 1. The two rear electric drive suspension mounting points 33 are both located on the rear side of the front electric drive suspension mounting point 11, so that the front electric drive suspension mounting point 11 and the rear electric drive suspension 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 allows the acting force to be symmetrically distributed on both sides of the subframe 100, thereby improving the driving stability of the vehicle.

[0113] In some embodiments, the distance between the rear electric drive suspension mounting point 33 and the rear cross beam 2 is smaller than the distance between the rear electric drive suspension mounting point 33 and the front cross beam 1 .

[0114] Specifically, the two ends of the front cross beam 1 are respectively connected to the two frame longitudinal beams 3, the two ends of the rear cross beam 2 are also respectively connected to the two frame longitudinal beams 3, the rear electric drive suspension mounting point 33 is set on the frame longitudinal beam 3, and Figure 6 As shown, the distance between the rear electric drive suspension mounting point 33 and the rear cross beam 2 is smaller than the distance between the rear electric drive suspension mounting point 33 and the front cross beam 1, that is, the distance between the rear electric drive suspension mounting point 33 and the rear cross beam 2 is smaller, and the distance between the rear electric drive suspension mounting point 33 and the front cross beam 1 is larger, thereby making the rear electric drive suspension mounting point 33 close to the rear cross beam 2.

[0115] In this way, the front electric drive suspension mounting point 11 can be connected to the front of the electric drive assembly 101, and the two rear electric drive suspension mounting points 33 can be connected to the rear of the electric drive assembly 101, so that the front and rear of the electric drive assembly 101 can be connected to the subframe 100, thereby improving the installation reliability and dispersing the gravity of the electric drive assembly 101 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.

[0116] In some embodiments, the distance between the top of the driving shaft 102 and the inner top wall of the avoidance space 51 is L1, and satisfies: 10 mm ≤ L1 ≤ 15 mm.

[0117] Specifically, the electric drive assembly 101 is dynamically connected to the drive shaft 102, and the drive shaft 102 is passed through the avoidance space 51 to the outside of the electric drive accommodating space 6. The arch structure 5 is arched upward, so that the avoidance 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 avoidance space 51 is L1, and satisfies: 10mm≤L1≤15mm, that is, the distance L1 between the top of the drive shaft 102 and the inner top wall of the avoidance space 51 can be set to 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm or 15mm, etc.

[0118] Preferably, in this embodiment, the distance L1 between the top of the drive shaft 102 and the inner top wall of the avoidance space 51 can be set to 12.7 mm, thereby ensuring that when the wheel moves to the uppermost end, 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, thereby ensuring the operating reliability of the drive shaft 102 and structures such as the wheel.

[0119] In some embodiments, a front body mounting portion 34 is provided at the front end of the frame longitudinal beam 3, and a rear body mounting portion 35 is provided at the rear end of the frame longitudinal beam 3. The distance between the center of the drive shaft 102 and the front body mounting portion 34 is L2, and satisfies: 310mm≤L2≤330mm. The distance between the center of the drive shaft 102 and the rear body mounting portion 35 is L3, and satisfies: 460mm≤L3≤480mm.

[0120] Specifically, the frame longitudinal beam 3 is extended along the front-rear direction of the vehicle, and the front end and the rear end of the frame longitudinal beam 3 are respectively connected to the vehicle body. Figure 1As shown, the front end of the frame longitudinal beam 3 is provided with a front vehicle body mounting portion 34, which can be configured as a mounting sleeve, which can be connected to the front end of the frame longitudinal beam 3 by welding or the like, and the rear end of the frame longitudinal beam 3 is provided with a rear vehicle body mounting portion 35, which can also be configured as a mounting sleeve, which can be connected to the rear end of the frame longitudinal beam 3 by welding or the like, thereby making it possible for both the front and rear ends of the frame longitudinal beam 3 to be connected to the vehicle body through the mounting sleeve, thereby increasing the connection area and ensuring the connection reliability.

[0121] Further, the drive shaft 102 is arranged in the avoidance space 51, that is, the drive shaft 102 is located between the front body mounting part 34 and the rear body mounting part 35 in the front-to-rear direction, and the distance between the center of the drive shaft 102 and the front body 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 body 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 body mounting part 34 can be set to 319mm.

[0122] In addition, the distance L3 between the center of the drive shaft 102 and the rear body mounting portion 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 body mounting portion 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 body mounting portion 35 can be set to 471mm.

[0123] In this way, when the rear subframe assembly 1000 is installed at the rear portion under the vehicle body through the front vehicle body mounting portion 34 and the rear vehicle body mounting portion 35, the position of the electric drive assembly 101 in the front-rear direction of the vehicle can be ensured, as can the position of the drive shaft 102 in the front-rear direction of the vehicle, thereby ensuring the reliability of the connection between the drive shaft 102 and the two rear wheels of the vehicle.

[0124] In some embodiments, the arch 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 the front body mounting portion 34 and the bottom surface of the middle portion of the frame longitudinal beam 3 are both lower than the bottom surface of the rear end of the rear body mounting portion 35 .

[0125] Specifically, the frame longitudinal beam 3 is formed with an upwardly protruding arch structure 5, the front body mounting portion 34 is arranged at the front end of the frame longitudinal beam 3, and the rear body mounting portion 35 is arranged at the rear end of the frame longitudinal beam 3, that is, the arch structure 5 is arranged between the front body mounting portion 34 and the rear body mounting portion 35, and the arch structure 5 is located between the front body mounting portion 34 and the middle part of the frame longitudinal beam 3, that is, the arch structure 5 is arranged close to the front part of the frame longitudinal beam 3, so that the distance between the arch structure 5 and the front body mounting portion 34 is relatively close, and the front part of the electric drive assembly 101 is connected to the front electric drive suspension mounting point 11 of the front cross beam 1, so that the front part of the subframe 100 needs to bear the gravity of the electric drive assembly 101, etc., the arch structure 5 can improve the structural strength of the frame longitudinal beam 3, and the arch structure 5 is arranged between the front body mounting portion 34 and the middle part of the frame longitudinal beam 3, thereby improving the overall structural strength of the front part of the subframe 100, so as to ensure the overall durability of the subframe 100 and improve the safety of use.

[0126] In addition, the bottom surface of the front body mounting portion 34 is set to be lower than the bottom surface of the rear end of the rear body mounting portion 35, and the bottom surface of the middle portion 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 portion 35, that is, when the electric drive assembly 101 and other structures are installed on the sub-frame 100, the center of gravity of the entire rear sub-frame assembly 1000 is located at the front of the rear sub-frame assembly 1000, and the arch structure 5 is arranged close to the front cross beam 1, so that the structural strength of the front portion of the sub-frame 100 is relatively high, thereby ensuring the overall reliability of the rear sub-frame assembly 1000, so as to improve the safety of vehicle use.

[0127] In some embodiments, a height difference L4 between the front vehicle body mounting portion 34 and the rear vehicle body mounting portion 35 satisfies: 100 mm≤L4≤120 mm.

[0128] Specifically, the front body mounting portion 34 is arranged at the front end of the frame longitudinal beam 3, and the rear body mounting portion 35 is arranged at the rear end of the frame longitudinal beam 3, and the front body mounting portion 34 and the rear body mounting portion 35 have a height difference. In this embodiment, the front body mounting portion 34 is arranged to be lower than the rear body mounting portion 35 to ensure the overall reliability of the rear sub-frame assembly 1000. Figure 3 As shown, the height difference between the front body mounting portion 34 and the rear body mounting portion 35 is set to L4, and satisfies: 100mm≤L4≤120mm, that is, the height difference L4 between the front body mounting portion 34 and the rear body mounting portion 35 can be set to 100mm, 102.5mm, 105mm, 107.5mm, 110mm, 112.5mm, 115mm, 117.5mm or 120mm, etc.

[0129] Preferably, in this embodiment, the height difference L4 between the front body mounting portion 34 and the rear body mounting portion 35 can be set to 108.5 mm, so that the center of gravity of the entire rear sub-frame assembly 1000 is located at the front of the rear sub-frame assembly 1000, and the arch structure 5 is arranged close to the front body mounting portion 34. The structural strength of the arch structure 5 is relatively high, so that the structural strength of the front part of the sub-frame 100 is relatively high, which can ensure the accuracy of the relative positions of the remaining structures installed on the rear sub-frame assembly 1000, such as the front lower control arm, the rear upper control arm, the front toe rod, the rear lower swing arm, etc., and can ensure the center of gravity position of the entire vehicle, thereby improving the vehicle running stability.

[0130] In some other embodiments, the distance between the front vehicle body mounting portion 34 and the rear vehicle body mounting portion 35 is d1, and satisfies: 780 mm ≤ d1 ≤ 800 mm.

[0131] Specifically, the frame longitudinal beam 3 is extended along the front-to-rear direction of the vehicle, and the front body mounting portion 34 is arranged at the front end of the frame longitudinal beam 3, and the rear body mounting portion 35 is arranged at the rear end of the frame longitudinal beam 3, that is, the front body mounting portion 34 and the rear body mounting portion 35 are spaced apart and distributed along the front-to-rear direction of the vehicle, and the distance between the front body mounting portion 34 and the rear body mounting portion 35 is set to d1, and satisfies: 780mm≤d1≤800mm, that is, the distance d1 between the front body mounting portion 34 and the rear body mounting portion 35 can be set to 780mm, 782.5mm, 785mm, 787.5mm, 790mm, 792.5mm, 795mm, 797.5mm or 800mm, etc.

[0132] Preferably, in this embodiment, the distance d1 between the front body mounting portion 34 and the rear body mounting portion 35 can be set to 791 mm. The distance d1 between the front body mounting portion 34 and the rear body mounting portion 35 is set to satisfy: 780 mm ≤ d1 ≤ 800 mm, which can ensure the reliability of the electric drive accommodating space 6 for accommodating the electric drive assembly 101, and avoid the front and rear dimensions of the subframe 100 being too large, affecting the lightweight of the vehicle, and ensuring the vehicle's endurance performance.

[0133] At the same time, a steering gear 103 is provided at the rear end of the subframe 100. The steering gear 103 is installed on the rear cross beam 2. The rear cross beam 2 is also provided with an avoidance notch 24 for avoiding the exhaust pipe of the engine. The exhaust pipe of the engine is connected to a muffler. When the exhaust pipe is exhausting, the muffler will heat up. The distance d1 between the front body mounting portion 34 and the rear body mounting portion 35 is set to meet: 780mm≤d1≤800mm, which can also avoid the steering gear 103 and the muffler being too close to each other, affecting the service life of the steering gear 103, so as to ensure the reliability of the steering gear 103.

[0134] In some embodiments, the inner wall surface of the avoidance space 51 includes a front wall surface 52 and a rear wall surface 53 , and the front wall surface 52 and the rear wall surface 53 are connected at the inner vertex of the avoidance space 51 , wherein the extension length of the front wall surface 52 is greater than the extension length of the rear wall surface 53 .

[0135] Specifically, an avoidance space 51 is formed below the arch structure 5 to avoid the drive shaft 102 and ensure the reliability of the drive shaft 102 driving the wheel, and the inner wall surface of the avoidance space 51 is set as a front wall surface 52 and a rear wall surface 53, and the front wall surface 52 and the rear wall surface 53 are both arc-shaped surfaces. The front wall surface 52 is located at the front of the avoidance space 51, and the rear wall surface 53 is located at the rear of the avoidance 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 at the inner vertex of the avoidance space 51, so that the inner wall of the avoidance space 51 has a uniform transition to ensure the reliability of avoiding the drive shaft 102.

[0136] Furthermore, the extension length of the front wall surface 52 is set to be greater than the extension length of the rear wall surface 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 portion 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 portion 35. The extension length of the front wall surface 52 is set to be greater than the extension length of the rear wall surface 53, so that the front body mounting portion 34 is located below the rear body mounting portion 35 in the height direction, which can ensure the structural strength of the front part of the subframe 100 and thus ensure safety in use.

[0137] In addition, the width of the frame longitudinal beam 3 in the left-right direction of the vehicle is set to 100 mm, which can ensure the structural strength of the frame longitudinal beam 3 to improve the overall structural strength of the subframe 100, and the two sides of the electric drive assembly 101 are respectively connected to the frame longitudinal beam 3, thereby improving the installation reliability of the electric drive assembly 101.

[0138] In some embodiments, the electric drive accommodating space 6 includes a front accommodating space 61 and a rear accommodating space 62, and the front accommodating space 61 is connected to the front side of the rear accommodating space 62, that is, the front accommodating space 61 is located on the front side, and the rear accommodating space 62 is located on the rear side, and the front accommodating space 61 is connected to the rear accommodating space 62, so as to facilitate the installation of structural components in the front accommodating space 61 and the rear accommodating space 62 respectively.

[0139] Furthermore, if Figure 6As shown, 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 a space formed by separating the front parts of the two frame longitudinal beams 3. The electric drive assembly 101 includes a reducer and a drive motor. The front accommodating space 61 is used to accommodate the reducer and the drive shaft 102, that is, the reducer and the drive shaft 102 are installed and accommodated in the front part of the sub-frame 100. The reducer is an important structure of the electric drive assembly 101, which is used to reduce the speed of the drive motor and increase the torque to drive the wheels. The output torque of the reducer can be transmitted to the wheels through the drive shaft 102 to ensure stable driving of the vehicle.

[0140] Among them, the avoidance space 51 is connected with the front accommodating space 61. Since the front part of the frame longitudinal beam 3 is provided with an arch structure 5, the arch structure 5 is arched upward to form the avoidance space 51 below the arch structure 5. By connecting the avoidance space 51 with the front accommodating space 61, the size of the front accommodating space 61 is increased to a certain extent, which is conducive to better installation and accommodation of the reducer and the drive shaft 102. At the same time, the drive shaft 102 avoids 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, and the drive shaft 102 can move freely in the avoidance space 51 without interference or collision with the frame longitudinal beam 3 due to obstruction by the frame longitudinal beam 3, thereby ensuring the operation reliability of the drive shaft 102.

[0141] In this way, the normal and stable operation of the reducer and the drive shaft 102 is ensured, and the friction loss of the drive shaft 102 is reduced. Especially when the wheel bounces upward to drive the drive shaft 102 to move upward, it can effectively prevent the drive shaft 102 from moving upward and hitting the front section of the longitudinal beam, causing noise, damage, etc. It can also prevent the drive shaft 102 from moving forward and backward or in other directions and hitting the front section of the longitudinal beam, causing noise, damage, etc.

[0142] And if Figure 6 As shown, 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 space between the rear parts of the two frame longitudinal beams 3. The rear accommodating space 62 is used to accommodate the drive motor, that is, the drive motor is installed and accommodated at the rear part of the rear sub-frame 100. The drive motor is a core component of the electric drive assembly 101, which is used to provide power to drive the vehicle forward. The drive motor can transmit power to the reducer, and then reduce and increase torque through the reducer, and then transmit it to the drive shaft 102. The drive shaft 102 drives the wheels to rotate to realize the forward movement of the vehicle.

[0143] Therefore, by installing and accommodating the reducer and the drive shaft 102 in the front accommodating space 61, and installing and accommodating the drive motor in the rear accommodating space 62, the space between the frame longitudinal beams 3 is fully utilized to achieve the reasonable allocation and installation of the electric drive assembly 101, improve the space utilization rate, and make the layout of the electric drive assembly 101 more compact and easy to install, disassemble and maintain.

[0144] In some embodiments, the frame longitudinal beam 3 includes an inner plate portion 31 and an outer plate portion 32, both of which are configured to be groove-shaped, and the inner plate portion 31 and the outer plate portion 32 are snap-fitted and press-fitted 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.

[0145] Specifically, the frame longitudinal beam 3 can be set to be integrally formed, or can be set to be formed by welding the inner plate portion 31 and the outer plate portion 32 together, which has high flexibility in setting. Figure 5 As shown, in the present embodiment, the frame longitudinal beam 3 is provided with an inner plate portion 31 and an outer plate portion 32, the inner plate portion 31 is provided on the inner side of the frame longitudinal beam 3, the outer plate portion 32 is provided on the outer side of the frame longitudinal beam 3, and the inner plate portion 31 and the outer plate portion 32 are both configured as grooves, and the inner plate portion 31 and the outer plate portion 32 are snap-fitted and press-fitted, so that after the inner plate portion 31 and the outer plate portion 32 are connected, a cavity is formed inside the frame longitudinal beam 3, which can reduce the weight of the sub-frame 100 as a whole to improve the lightweight of the vehicle, and when the force is transmitted to the frame longitudinal beam 3, the cavity inside the frame longitudinal beam 3 can buffer the force to weaken the effect of the force, thereby improving the safety of use, and can improve the NVH performance of the whole vehicle to improve the comfort of the user.

[0146] In addition, a portion of the inner plate 31 and a portion of the outer plate 32 can jointly form an arch structure 5, that is, the arch structure 5 can be evenly distributed in the width direction of the frame longitudinal beam 3, so that the structural strength of the arch structure 5 of the frame longitudinal beam 3 can be enhanced, and the force along the front-rear direction transmitted through the frame longitudinal beam 3 needs to be transmitted to the arch structure 5 to weaken the force, thereby ensuring the overall structural strength of the sub-frame 100 and improving the reliability of use.

[0147] In some embodiments, the height difference between the highest point of the avoidance space 51 and the lowest point of the front end of the frame longitudinal beam 3 is L6, and satisfies: 125 mm≤L6≤145 mm.

[0148] Specifically, the arch structure 5 is arched upward so that an escape space 51 is formed thereunder. The escape space 51 is open downward and has a highest point. The height difference between the highest point of the escape 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, the height difference L6 between the highest point of the escape 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.

[0149] It is understandable that the greater the height difference L6 between the highest point of the avoidance 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 avoidance space 51 and the lower the lowest point of the front end of the frame longitudinal beam 3, the larger the avoidance space 51 will be. However, this will cause the arch structure 5 to be more arched upward, thereby causing the structure to be complex, the size occupied by the entire sub-frame 100 in the vertical direction of the vehicle to increase, and the overall weight of the sub-frame 100 to increase.

[0150] Therefore, by setting the height difference L6 between the highest point of the avoidance space 51 and the lowest point of the front end of the frame longitudinal beam 3 within a reasonable range of 125 mm to 145 mm, the height difference L6 between the highest point of the avoidance space 51 and the lowest point of the front end of the frame longitudinal beam 3 can be made smaller while effectively reducing the occupied size of the entire sub-frame 100 in the up-down direction of the vehicle, thereby making the sub-frame 100 simpler in structure and lighter in weight, and improving the load transfer efficiency.

[0151] In addition, if Figure 7 As shown, the height difference between the highest point of the avoidance 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 avoidance space 51 and the lowest point of the middle part of the frame longitudinal beam 3 is set to 82mm, which can effectively reduce the occupied size of the entire sub-frame 100 in the up and down direction of the vehicle while making the height difference L7 between the highest point of the avoidance space 51 and the lowest point of the middle part of the frame longitudinal beam 3 smaller, thereby making the sub-frame 100 simpler in structure, lighter in weight, and improving load transfer efficiency.

[0152] In some other embodiments, the height of the arch structure 5 along the vertical direction of the vehicle is H1, and satisfies: 70 mm ≤ H1 ≤ 80 mm.

[0153] Specifically, Figure 7 As shown, 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.

[0154] It can be understood that, the greater the height H1 of the arch structure 5 along the vertical direction of the vehicle, that is, the greater the structural strength of the arch structure 5, the lower the apex of the avoidance space 51, which will make the avoidance space 51 smaller and cause the arch structure 5 to be complicated, increase the size occupied by the entire sub-frame 100 in the vertical direction of the vehicle, and increase the overall weight of the sub-frame 100.

[0155] Therefore, by setting the height H1 of the arch structure 5 in the vertical direction of the vehicle within a reasonable range of 70 mm to 80 mm, the height of the arch structure 5 in the vertical direction of the vehicle can be set to be smaller while effectively reducing the occupied dimensions of the entire subframe 100 in the vertical direction of the vehicle and ensuring the structural strength of the frame longitudinal beam 3, thereby making the subframe 100 simpler in structure and lighter in weight, and improving the load transfer efficiency.

[0156] In addition, the height of the middle portion of the frame longitudinal beam 3 along the vertical direction of the vehicle is set to L9, and satisfies: 100mm≤L9≤110mm, and the height of the rear end of the frame 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 portion of the frame 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 frame longitudinal beam 3 along the vertical direction of the vehicle is set to 83mm, which can effectively reduce the occupied size of the entire sub-frame 100 in the vertical direction of the vehicle and ensure the structural strength of the frame longitudinal beam 3, while making the sub-frame 100 simpler in structure, lighter in weight, and improving the load transfer efficiency.

[0157] And if Figure 5-Figure 7 As shown, the frame longitudinal beam 3 is provided with a front upper arm mounting bracket 40 at the upper front end portion of the arch structure 5 and a front lower arm mounting bracket 41 at the lower front end portion, the frame longitudinal beam 3 is provided with a rear upper arm mounting bracket 42 at the upper rear end portion and a rear lower arm mounting bracket 43 at the lower rear end portion, 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, and 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 for installing control arms.

[0158] Furthermore, the front upper arm mounting bracket 40 is provided with a front upper arm mounting portion 401, which can be set as a mounting hole, etc., so that the control arm can be connected to the front upper arm mounting bracket 40 by structures such as bolts, the front lower arm mounting bracket 41 is provided with a front lower arm mounting portion 411, which can be set as a mounting hole, etc., so that the control arm can be connected to the front lower arm mounting bracket 41 by structures such as bolts, the rear upper arm mounting bracket 42 is provided with a rear upper arm mounting portion 421, which can be set as a mounting hole, etc., so that the control arm can be connected to the rear upper arm mounting bracket 42 by structures such as bolts, the rear lower arm mounting bracket 43 is provided with a rear lower arm mounting portion 433, which can be set as a mounting hole, etc., so that the control arm can be connected to the rear lower arm mounting bracket 43 by structures such as bolts, etc., the structure is simple, the installation is convenient, and the installation cost is low.

[0159] In addition, the rear lower arm mounting bracket 43 includes front and rear arranged plates 431 and a reinforcing plate 432 located between the two plates 431. The rear lower arm mounting portion 433 is provided on the two plates 431 to ensure the connection reliability of the control arm connected to the rear lower arm mounting bracket 43. A rear suspension toe rod mounting portion may also be provided at the rear end lower portion of the frame longitudinal beam 3. The rear suspension toe rod mounting portion is used to mount 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.

[0160] The rear cross beam 2 is also provided with a toe adjustment avoidance hole 25 which passes through in the front-to-back direction. The toe adjustment avoidance hole 25 is used to avoid an adjustment tool for adjusting the toe rod of the rear suspension, thereby improving maintenance convenience and saving maintenance time.

[0161] The present invention also provides a vehicle.

[0162] The vehicle according to the embodiment of the present invention comprises any one of the above-mentioned rear subframe assemblies 1000 .

[0163] According to the vehicle of the embodiment of the present invention, there is provided an electric drive accommodating space 6, an avoidance space 51 and a steering gear avoidance hole 21, so that the overall space occupied by the rear sub-frame assembly 1000 can be reduced to improve the overall integration of the rear sub-frame assembly 1000, thereby improving the lightweight of the entire vehicle, ensuring the vehicle endurance performance, and improving the user experience. 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 sub-frame 100, thereby ensuring the safety of the use of the rear sub-frame assembly 1000, and the use effect is better and the scope of application is wider.

[0164] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0165] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rear subframe assembly, characterized in that: include: A subframe, the subframe comprising a front crossbeam, a rear crossbeam and two frame longitudinal beams, the front crossbeam and the rear crossbeam are spaced apart in the longitudinal direction of the vehicle and are respectively connected between the two frame longitudinal beams to jointly define an electric drive accommodating space, at least a portion of each frame longitudinal beam is configured as an arched structure, the arched structure arches upward to form an avoidance space below the arched structure, the rear crossbeam is formed with a steering gear avoidance hole, the steering gear avoidance hole is used to avoid the steering gear; An electric drive assembly is installed in the electric drive accommodating space, and the electric drive assembly is dynamically connected to a drive shaft, and the drive shaft passes through the avoidance space to the outside of the electric drive accommodating space.

2. The rear subframe assembly according to claim 1, characterized in that: The steering gear avoidance hole passes through the rear cross beam in the front-rear direction, and at least a portion of the steering gear is placed in the steering gear avoidance hole.

3. The rear subframe assembly according to claim 2, characterized in that: The rear cross beam is provided with a plurality of steering gear mounting points, the plurality of steering gear mounting points are used to mount the steering gear, and the plurality of steering gear mounting points are spaced and distributed around the steering gear avoidance hole; And / or, the distance between the outer wall of the part of the steering gear placed in the steering gear avoidance hole and the inner wall of the steering gear avoidance hole is set to A, and satisfies: 4mm≤A≤6mm.

4. The rear subframe assembly according to claim 1, characterized in that: At least part of the steering gear is located at the rear side of the rear cross beam, and an avoidance groove is formed on the rear side wall of the rear cross beam. The avoidance groove is connected to the steering gear avoidance hole along the transverse direction of the vehicle. The steering gear is provided with a steering gear yoke, and the avoidance groove is used to avoid the steering gear yoke.

5. The rear subframe assembly according to claim 4, characterized in that: There are two avoidance grooves, which are respectively connected to the two sides of the steering gear avoidance hole along the lateral direction of the vehicle, and the two avoidance grooves are both constructed as arc grooves, and the radii of the two avoidance grooves are respectively set to R1 and R2, and meet the following conditions: 30mm≤R1≤40mm, 40mm≤R2≤50mm.

6. The rear subframe assembly according to claim 1, characterized in that: The width of the steering gear avoidance hole is set to D1 and satisfies: 270mm≤D1≤280mm; And / or, the maximum distance between the upper wall and the lower wall of the steering gear avoidance hole is set to D2, and satisfies: 140mm≤D2≤150mm; And / or, the minimum distance between the upper wall and the lower wall of the steering gear avoidance hole is set to D3, and satisfies: 110mm≤D3≤130mm.

7. The rear subframe assembly according to claim 1, characterized in that: The thickness of the rear cross beam in the front-rear direction of the vehicle is set to D4 and satisfies: 60 mm ≤ D4 ≤ 80 mm; And / or, the maximum height of the rear cross beam is set to D5 and satisfies: 220 mm ≤ D5 ≤ 240 mm.

8. The rear subframe assembly according to claim 1, characterized in that: One end of the rear cross beam is also provided with an avoidance notch, and the avoidance notch is suitable for passing through in the front-to-back direction and is used for avoiding the exhaust pipe of the engine.

9. The rear subframe assembly according to claim 8, characterized in that: The avoidance notch is open downward, and the distance between the upper wall of the avoidance notch and the upper wall of the rear cross beam is set to D6, and satisfies: 160mm≤D6≤180mm; And / or, the rear cross beam is constructed as an integral piece.

10. The rear subframe assembly according to claim 1, characterized in that: The electric drive assembly is dynamically connected to the two drive shafts, both of which extend transversely of the vehicle, and the two drive shafts are respectively and one-to-one arranged in the avoidance spaces of the two frame longitudinal beams.

11. The rear subframe assembly according to claim 1, characterized in that: The front cross beam is provided with a front electric drive suspension mounting point, each of the frame longitudinal beams is provided with a rear electric drive suspension mounting point, the arch structure is located between the rear electric drive suspension mounting point and the front cross beam, and the front electric drive suspension mounting point and the rear electric drive suspension mounting points of the two frame longitudinal beams are all used to install the electric drive assembly.

12. The rear subframe assembly according to claim 11, characterized in that: The rear electric drive suspension mounting points of the two frame longitudinal beams are directly opposite to each other in the transverse direction of the vehicle, and the front electric drive suspension mounting point and the rear electric drive suspension mounting points of the two frame longitudinal beams are distributed in an isosceles triangle.

13. The rear subframe assembly according to claim 12, characterized in that: The distance between the rear electric drive suspension mounting point and the rear cross beam is smaller than the distance between the rear electric drive suspension mounting point and the front cross beam.

14. The rear subframe assembly according to claim 1, characterized in that: The distance between the top of the driving shaft and the inner top wall of the avoidance space is L1, and satisfies: 10mm≤L1≤15mm.

15. The rear subframe assembly according to claim 14, characterized in that: The front end of the frame longitudinal beam is provided with a front vehicle body mounting portion, and the rear end of the frame longitudinal beam is provided with a rear vehicle body mounting portion; The distance between the center of the drive shaft and the front vehicle body mounting portion is L2, and satisfies: 310mm≤L2≤330mm; the distance between the center of the drive shaft and the rear vehicle body mounting portion is L3, and satisfies: 460mm≤L3≤480mm.

16. The rear subframe assembly according to claim 15, characterized in that: The arch structure is located between the front body mounting portion and the middle portion of the frame longitudinal beam, and the bottom surface of the front body mounting portion and the bottom surface of the middle portion of the frame longitudinal beam are both lower than the bottom surface of the rear end of the rear body mounting portion.

17. The rear subframe assembly according to claim 15, characterized in that: The height difference between the front vehicle body mounting portion and the rear vehicle body mounting portion is L4, and satisfies: 100mm≤L4≤120mm; And / or, the distance between the front vehicle body mounting portion and the rear vehicle body mounting portion is d1, and satisfies: 780 mm ≤ d1 ≤ 800 mm.

18. The rear subframe assembly according to claim 1, characterized in that: The inner wall surface of the escape space includes a front wall surface and a rear wall surface, and the front wall surface and the rear wall surface are connected at the inner vertex of the escape space; Wherein, the extension length of the front wall surface is greater than the extension length of the rear wall surface.

19. The rear subframe assembly according to claim 1, characterized in that: The electric drive accommodating space includes a front accommodating space and a rear accommodating space, the front accommodating space is connected to the front side of the rear accommodating space, the front accommodating space is formed between the front sections of the two frame longitudinal beams, and the rear accommodating space is formed between the rear sections of the two frame longitudinal beams. The electric drive assembly includes a reducer and a drive motor, the front accommodating space is used to accommodate the reducer and the drive shaft, the avoidance space is connected to the front accommodating space, and the rear accommodating space is used to accommodate the drive motor.

20. The rear subframe assembly according to claim 1, characterized in that: The frame longitudinal beam includes an inner plate portion and an outer plate portion, both of which are configured as grooves, and the inner plate portion and the outer plate portion are snap-fitted and press-fitted, and a portion of the inner plate portion and a portion of the outer plate portion together form the arch structure.

21. The rear subframe assembly according to claim 1, characterized in that: The height difference between the highest point of the avoidance 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.

22. A vehicle, characterized in that: Comprising the rear subframe assembly as described in any one of claims 1-21.

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