Rear auxiliary frame and vehicle

Abstract

The utility model discloses a rear sub-frame and a vehicle. The rear sub-frame comprises at least one frame cross beam, at least one rear sub-frame and at least one rear sub-frame, the two frame longitudinal beams are distributed in the transverse direction of the vehicle at intervals, the at least one frame cross beam is connected between the two frame longitudinal beams, at least part of each frame longitudinal beam is constructed into an arch structure, and the arch structure is constructed to be arched upwards so that an avoiding space used for avoiding a driving shaft of the electric drive assembly can be formed below the arch structure; wherein the arch structure is configured in a manner that the length of the arch structure extending forwards and downwards from the vertex is larger than the length of the arch structure extending backwards and downwards from the vertex, and the front end of the frame longitudinal beam is lower than the rear end of the frame longitudinal beam. According to the rear auxiliary frame provided by the embodiment of the utility model, at least part of the frame longitudinal beam is constructed into the arch-shaped structure to form the avoiding space, so that the interference between the frame longitudinal beam and the driving shaft of the electric drive assembly can be avoided, and the front end of the frame longitudinal beam can absorb collision energy through deformation when a vehicle is in head-on collision; and the use safety of the vehicle can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to a rear subframe and a vehicle having the rear subframe. Background Technology

[0002] The rear subframe, as an important component of the vehicle, plays a role in bearing the weight of the vehicle body and transmitting forces. The rear subframe includes frame crossbeams and frame longitudinal beams. The frame longitudinal beams extend longitudinally along the vehicle. When installing the rear subframe, the frame longitudinal beams are prone to interference with the drive shaft of the electric drive assembly that extends laterally along the vehicle, indicating room for improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rear subframe that can prevent interference between the frame longitudinal beams and the drive shaft of the electric drive assembly, and allows the front end of the frame longitudinal beams to absorb collision energy through deformation in the event of a frontal collision, thereby improving vehicle safety.

[0004] According to an embodiment of the present invention, a rear subframe includes: at least one frame crossbeam; two frame longitudinal beams, the two frame longitudinal beams being distributed laterally across the vehicle, at least one frame crossbeam being connected between the two frame longitudinal beams, at least a portion of the frame longitudinal beams being constructed as an arched structure, the arched structure being constructed to arch upwards to form a clearance space below the arched structure for accommodating the drive shaft of an electric drive assembly; wherein the arched structure is constructed such that the length extending downwards from the apex is greater than the length extending downwards from the apex, and the front end of the frame longitudinal beam is lower than the rear end of the frame longitudinal beam.

[0005] According to the rear subframe of this utility model embodiment, by connecting the frame crossbeam and the frame longitudinal beam, the frame crossbeam and the frame longitudinal beam can jointly transmit and dissipate lateral and longitudinal forces, thereby improving the vehicle's ride comfort. Furthermore, by constructing at least a portion of the frame longitudinal beam as an arched structure to create clearance space, interference between the frame longitudinal beam and the drive shaft of the electric drive assembly can be avoided, thereby improving the reliability of the frame longitudinal beam and the electric drive assembly. In addition, by constructing the arched structure such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, the front end of the frame longitudinal beam is lower than the rear end of the frame longitudinal beam, so that the front end of the frame longitudinal beam can absorb collision energy through deformation during a frontal collision, thereby improving the vehicle's safety.

[0006] According to some embodiments of the present invention, in the rear subframe, the arched structure is located between the front end and the middle of the frame longitudinal beam, and the bottom surface of the front end and the bottom surface of the middle of the frame longitudinal beam are both lower than the bottom surface of the rear end of the frame longitudinal beam.

[0007] According to some embodiments of the present invention, the height difference L1 between the front end and the rear end of the frame longitudinal beam is 100mm≤L1≤120mm; and / or the distance between the front end and the rear end of the frame longitudinal beam is d, and satisfies 780mm≤d≤800mm.

[0008] According to some embodiments of the present invention, the rear subframe of the clearance space includes a front wall and a rear wall, the front wall and the rear wall being connected to the inner apex of the clearance space; wherein the extension length of the front wall is greater than the extension length of the rear wall.

[0009] According to some embodiments of the present invention, the rear subframe has both the front and rear wall surfaces constructed as curved surfaces, and the radius of curvature of the front wall surface is greater than that of the rear wall surface.

[0010] According to some embodiments of the present utility model, the rear subframe has a front mounting point at the front end of the frame longitudinal beam and a rear mounting point at the rear end of the frame longitudinal beam. The front mounting point is lower than the rear mounting point and both are used to connect to the vehicle body.

[0011] According to some embodiments of the present invention, the rear subframe includes an inner plate portion and an outer plate portion. Both the inner plate portion and the outer plate portion are constructed as grooves. The inner plate portion and the outer plate portion are fastened together. A portion of the inner plate portion and a portion of the outer plate portion together form the arched structure.

[0012] According to some embodiments of the present invention, the height difference between the highest point of the clearance space and the lowest point of the front end of the longitudinal beam of the frame is L2, and satisfies: 125mm≤L2≤145mm; and / or, the height of the arched structure along the vertical direction of the vehicle is H, and satisfies: 70mm≤H≤80mm.

[0013] According to some embodiments of the present invention, the rear subframe has two frame crossbeams, which are distributed at intervals along the longitudinal direction of the vehicle. The frame longitudinal beam and at least one of the frame crossbeams are provided with motor mounting points.

[0014] This utility model also proposes a vehicle.

[0015] The vehicle according to an embodiment of the present invention includes an electric drive assembly and a rear subframe as described in any of the above embodiments. The electric drive assembly is connected to the longitudinal beam of the frame and at least one of the cross beams of the frame via a motor suspension. The drive shaft of the electric drive assembly passes through the clearance space.

[0016] The vehicle and the aforementioned rear subframe have the same advantages over the prior art, which will not be elaborated here.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a structural schematic diagram of the rear subframe according to an embodiment of the present utility model;

[0020] Figure 2 This is a left view of the rear subframe according to an embodiment of the present utility model;

[0021] Figure 3 This is a top view of the rear subframe according to an embodiment of the present utility model.

[0022] Figure label:

[0023] Rear subframe 100,

[0024] Frame crossbeam 1,

[0025] Frame longitudinal beam 2, arched structure 21, clearance space 22, inner wall 221, front wall 222, rear wall 223, inner panel section 23, outer panel section 24.

[0026] Motor mounting point 3, front mounting point of the vehicle body 4, rear mounting point of the vehicle body 5, control arm mounting bracket 6, sleeve 7. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z direction.

[0031] The following is for reference. Figures 1-3 The rear subframe 100 according to the present invention can avoid interference between the frame longitudinal beam 2 and the drive shaft of the electric drive assembly, thereby improving the reliability of the operation of the frame longitudinal beam 2 and the electric drive assembly. In addition, the front end of the frame longitudinal beam 2 can absorb collision energy by deformation when the vehicle is involved in a frontal collision, thereby improving the safety of the vehicle.

[0032] like Figures 1-3 As shown, a rear subframe 100 according to an embodiment of the present invention includes: at least one frame crossbeam 1 and two frame longitudinal beams 2.

[0033] Two frame longitudinal beams 2 are distributed laterally along the vehicle, and at least one frame crossbeam 1 is connected between the two frame longitudinal beams 2. At least a portion of the frame longitudinal beam 2 is constructed as an arched structure 21. The arched structure 21 is constructed to arch upward to form a clearance space 22 below the arched structure 21 for avoiding the drive shaft of the electric drive assembly. The arched structure 21 is constructed such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, and the front end of the frame longitudinal beam 2 is lower than the rear end of the frame longitudinal beam 2.

[0034] Specifically, the rear subframe 100 can be used to isolate vibrations and noise from the wheels and road surface, preventing them from being directly transmitted into the passenger compartment, thereby improving the vehicle's ride comfort. The rear subframe 100 includes a frame crossbeam 1 and a frame longitudinal beam 2. The frame crossbeam 1 is constructed to extend laterally along the vehicle to transmit and dissipate lateral forces, while the frame longitudinal beam 2 is constructed to extend longitudinally along the vehicle to transmit and dissipate longitudinal forces. Moreover, there is at least one frame crossbeam 1, meaning that the number of frame crossbeams 1 can be one, two, or three, etc., to allow for transmission of at least one frame. The crossbeam 1 transmits lateral forces, improving the reliability of lateral force transmission and dissipation. There are two longitudinal beams 2, which can transmit longitudinal forces together, improving the reliability of longitudinal force transmission and dissipation. The two longitudinal beams 2 are distributed laterally along the vehicle, so that there is a certain distance between the two longitudinal beams 2. This allows the two longitudinal beams 2 to transmit longitudinal forces from two different positions at the same time, which can further improve the efficiency and reliability of longitudinal force transmission, enabling rapid transmission and dissipation of longitudinal forces.

[0035] It should be noted that both the frame crossbeam 1 and the frame longitudinal beam 2 can be constructed as tubular structures to reduce the weight of the frame crossbeam 1 and the frame longitudinal beam 2 while ensuring that lateral and longitudinal forces can be transmitted and dissipated respectively. This reduces the overall weight of the rear subframe 100 and facilitates its installation on the vehicle.

[0036] Furthermore, by connecting at least one frame crossbeam 1 between two frame longitudinal beams 2, both ends of at least one frame crossbeam 1 can be simultaneously connected to the two frame longitudinal beams 2, so that at least one frame crossbeam 1 and the two frame longitudinal beams 2 can together form the basic frame structure of the rear subframe 100. Moreover, the frame crossbeam 1 and the frame longitudinal beams 2 can be connected by welding, making the rear subframe 100 a whole, which can improve the structural stability and operational reliability of the rear subframe 100. In addition, by connecting the frame crossbeam 1 and the frame longitudinal beams 2, the frame crossbeam 1 and the frame longitudinal beams 2 can jointly transmit and dissipate lateral and longitudinal forces, which can further improve the reliability and efficiency of transmitting and dissipating lateral and longitudinal forces, thereby effectively improving the ride comfort of the vehicle and helping to improve user satisfaction.

[0037] Meanwhile, by constructing at least a portion of the frame longitudinal beam 2 as an arched structure 21, or by constructing part or all of the frame longitudinal beam 2 as an arched structure 21, the shape of the frame longitudinal beam 2 can be changed so that the frame longitudinal beam 2 can avoid interference between the frame longitudinal beam 2 and the drive shaft of the electric drive assembly at the arched structure 21, thereby avoiding a decrease in the reliability of their operation. Moreover, by constructing the arched structure 21 as an upward arch, the arched structure 21 can be constructed as a bridge, so as to form a clearance space 22 below the arched structure 21. The clearance space 22 is used to avoid interference between the frame longitudinal beam 2 and the drive shaft of the electric drive assembly, thereby improving the reliability of the operation of the frame longitudinal beam 2 and the electric drive assembly.

[0038] Furthermore, the arch structure 21 is constructed such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex. That is, the length of the part of the arch structure 21 located in front of the apex is greater than the length of the part located behind the apex. In other words, the arch structure 21 is an asymmetrical structure, which allows the arch structure 21 to adapt to more complex installation environments and facilitates the installation of the arch structure 21. Moreover, the front end of the frame longitudinal beam 2 is lower than the rear end of the frame longitudinal beam 2, which helps the frame longitudinal beam 2 to better absorb and disperse impact forces during a collision. That is, when the vehicle is involved in a frontal collision, the front end of the frame longitudinal beam 2 can absorb collision energy through deformation to protect the safety of the occupants and improve the safety of the vehicle.

[0039] According to the rear subframe 100 of this utility model embodiment, by connecting the frame crossbeam 1 and the frame longitudinal beam 2, the frame crossbeam 1 and the frame longitudinal beam 2 can jointly transmit and dissipate lateral and longitudinal forces, thereby improving the ride comfort of the vehicle. Furthermore, by constructing at least a portion of the frame longitudinal beam 2 as an arched structure 21 to form a clearance space 22, interference between the frame longitudinal beam 2 and the drive shaft of the electric drive assembly can be avoided, thereby improving the reliability of the operation of the frame longitudinal beam 2 and the electric drive assembly. In addition, by constructing the arched structure 21 such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, the front end of the frame longitudinal beam 2 is lower than the rear end of the frame longitudinal beam 2, so that the front end of the frame longitudinal beam 2 can absorb collision energy through deformation when the vehicle is involved in a frontal collision, thereby improving the safety of the vehicle.

[0040] In some embodiments, the arch structure 21 is located between the front end and the middle of the frame longitudinal beam 2, and the bottom surface of the front end and the bottom surface of the middle of the frame longitudinal beam 2 are both lower than the bottom surface of the rear end of the frame longitudinal beam 2.

[0041] Specifically, by placing the arched structure 21 between the front end and the middle of the longitudinal beam 2 of the frame, a portion of the longitudinal beam 2 can be constructed as an arched structure 21, reducing manufacturing difficulty and decreasing the vertical height of the longitudinal beam 2 along the vehicle, which facilitates the installation of the rear subframe 100 on the vehicle. Furthermore, by placing the arched structure 21 between the front end and the middle of the longitudinal beam 2 of the frame, both ends of the arched structure 21 can be connected to the front end and the middle of the longitudinal beam 2 of the frame, respectively. That is, the front end and the middle of the longitudinal beam 2 of the frame are respectively connected to the arched structure 21. The apex extends forward and downward and backward and downward. At the same time, the bottom surface of the front end and the bottom surface of the middle part of the frame longitudinal beam 2 are constructed to be lower than the bottom surface of the rear end of the frame longitudinal beam 2. This makes the frame longitudinal beam 2 present a trend of low front end and high rear end. The downward extension length of the front end of the frame longitudinal beam 2 is greater than the downward extension length of other positions on the frame longitudinal beam 2. Therefore, the front end of the frame longitudinal beam 2 is more likely to deform in the event of a frontal collision, which is conducive to absorbing collision energy and improving the vehicle's safety.

[0042] In some embodiments, the height difference L1 between the front end and the rear end of the frame longitudinal beam 2 is 100mm≤L1≤120mm; and / or the distance between the front end and the rear end of the frame longitudinal beam 2 is d, and satisfies 780mm≤d≤800mm.

[0043] Specifically, the bottom surface of the front end of the longitudinal beam 2 is lower than the bottom surface of the rear end of the longitudinal beam 2. That is, the front end of the longitudinal beam 2 is lower than the rear end of the longitudinal beam 2, and the downward extension length of the front end of the longitudinal beam 2 is greater than the downward extension length of the rear end of the longitudinal beam 2. This is to facilitate the deformation of the front end of the longitudinal beam 2 to absorb collision energy during a frontal collision. The height difference L1 between the front end and the rear end of the longitudinal beam 2 can be between 100mm and 120mm, i.e., L1 can be 105mm, 108mm, or 115mm, etc. This avoids L1 being too large or too small. If it is too large, the height of the longitudinal beam 2 along the vertical direction of the vehicle will be too large, which is not conducive to the installation of the rear subframe 100 on the vehicle. If it is too small, the downward extension length of the front end of the longitudinal beam 2 will be too small, making it difficult to absorb collision energy through deformation during a frontal collision.

[0044] Meanwhile, the distance d between the front end and the rear end of the frame longitudinal beam 2 can be between 780mm and 800mm, that is, d can be 785mm, 791mm or 795mm, etc., which can avoid d being too large or too small. If it is too large, the longitudinal beam 2 will extend too long along the vehicle's longitudinal direction, which is not conducive to the installation of the rear subframe 100 on the vehicle. If it is too small, the longitudinal beam 2 will extend too short along the vehicle's longitudinal direction, which will result in the clearance space 22 being too small along the vehicle's longitudinal direction, which is not conducive to clearance of the drive shaft of the electric drive assembly.

[0045] Furthermore, it should be noted that the distance between the front end of the frame longitudinal beam 2 and the drive shaft of the electric drive assembly along the longitudinal direction of the vehicle can be set as D1. D1 can be between 310mm and 330mm, that is, D1 can be 315mm, 319mm or 325mm, etc., to avoid D1 being too large or too small. If it is too large, it will cause the clearance space 22 to have too large a span along the longitudinal direction of the vehicle, resulting in wasted space, or cause the front end of the frame longitudinal beam 2 to extend downward too long, which is not conducive to the installation of the rear subframe 100 on the vehicle. If it is too small, it will cause the clearance space 22 to have too small a span along the longitudinal direction of the vehicle, causing the frame longitudinal beam 2 and the drive shaft of the electric drive assembly to interfere.

[0046] In some embodiments, the inner wall surface 221 of the clearance space 22 includes a front wall surface 222 and a rear wall surface 223, which are connected to the inner vertex of the clearance space 22; wherein the extension length of the front wall surface 222 is greater than the extension length of the rear wall surface 223.

[0047] Specifically, the inner wall 221 of the clearance space 22 is the lower surface of the arch structure 21. The inner wall 221 of the clearance space 22 includes a front wall 222 and a rear wall 223, and the front wall 222 and the rear wall 223 are connected to the inner vertex of the clearance space 22. That is, the front wall 222 is a wall extending forward from the inner vertex of the clearance space 22, and the rear wall 223 is a wall extending backward from the inner vertex of the clearance space 22. The extension length of the front wall 222 is greater than the extension length of the rear wall 223, so that the length of the arch structure 21 extending forward and downward from the vertex is greater than the length extending backward and downward. This also makes the front end of the frame longitudinal beam 2 connected to the arch structure 21 lower than the middle of the frame longitudinal beam 2. This makes it easier for the front end of the frame longitudinal beam 2 to deform to absorb collision energy when the vehicle is involved in a frontal collision, thereby protecting the occupants and improving the safety of the vehicle.

[0048] In some embodiments, both the front wall surface 222 and the rear wall surface 223 are constructed as curved surfaces, and the radius of curvature of the front wall surface 222 is greater than the radius of curvature of the rear wall surface 223.

[0049] Specifically, by constructing both the front wall 222 and the rear wall 223 as curved surfaces, a smooth transition can be achieved at their connection points, reducing the possibility of fracture due to stress concentration. Furthermore, the radius of curvature of the front wall 222 is greater than that of the rear wall 223. That is, when both the front wall 222 and the rear wall 223 are connected to the inner apex of the clearance space 22, the extension length of the front wall 222 can be greater than that of the rear wall 223. Consequently, the length of the arched structure 21 extending forward and downward from its apex is greater than its length extending backward and downward. This also allows the front end of the frame longitudinal beam 2 connected to the arched structure 21 to be lower than the middle of the frame longitudinal beam 2. This makes it easier for the front end of the frame longitudinal beam 2 to deform and absorb collision energy during a frontal collision, protecting the occupants and improving the vehicle's safety.

[0050] In some embodiments, the front end of the frame longitudinal beam 2 is provided with a front mounting point 4, and the rear end of the frame longitudinal beam 2 is provided with a rear mounting point 5. The front mounting point 4 is lower than the rear mounting point 5 and both are used to connect to the vehicle body.

[0051] Specifically, both the front mounting point 4 and the rear mounting point 5 are used to connect the rear subframe 100 to the vehicle body. The front mounting point 4 is located at the front end of the longitudinal beam 2 of the frame, and the rear mounting point 5 is located at the rear end of the longitudinal beam 2 of the frame. Thus, both the front mounting point 4 and the rear mounting point 5 are located on the longitudinal beam 2 of the frame. The rear subframe 100 can be installed on the vehicle by connecting the longitudinal beam 2 of the frame to the vehicle body. There are two longitudinal beams 2 of the frame, that is, there are two front mounting points 4 and two rear mounting points 5 of the frame. The two front mounting points 4 and the two rear mounting points 5 are spaced apart. Thus, the longitudinal beam 2 of the frame can be connected to the vehicle body from four positions at the same time through the two front mounting points 4 and the two rear mounting points 5, which can improve the reliability and stability of the connection between the rear subframe 100 and the vehicle body.

[0052] And, it should be noted that, such as Figure 1 As shown, both the front mounting point 4 and the rear mounting point 5 of the vehicle body are equipped with sleeves 7. The sleeves 7 can be welded to the longitudinal beams 2 of the frame to achieve reliable fixation of the sleeves 7. At the same time, the sleeves 7 can be connected to the vehicle body through connectors to achieve the connection between the rear subframe 100 and the vehicle body.

[0053] In some embodiments, the frame longitudinal beam 2 includes an inner plate portion 23 and an outer plate portion 24, both of which are constructed in a groove shape. The inner plate portion 23 and the outer plate portion 24 are fastened together, and a portion of the inner plate portion 23 and a portion of the outer plate portion 24 together form an arch structure 21.

[0054] Specifically, such as Figure 1 and Figure 3As shown, the frame longitudinal beam 2 includes an inner plate portion 23 and an outer plate portion 24. The inner plate portion 23 is closer to the center of the vehicle, and the outer plate portion 24 is farther away from the center of the vehicle. The inner plate portion 23 and the outer plate portion 24 are distributed along the transverse direction of the vehicle, so that the longitudinal force can be transmitted and dissipated together by the inner plate portion 23 and the outer plate portion 24. Both the inner plate portion 23 and the outer plate portion 24 are constructed as grooves, so that the cross-section of the inner plate portion 23 and the outer plate portion 24 is U-shaped, which can improve the structural strength of the inner plate portion 23 and the outer plate portion 24. At the same time, the inner plate portion 23 and the outer plate portion 24 are fastened together to make the frame longitudinal beam 2 a whole, which can improve the structural strength and operational reliability of the frame longitudinal beam 2. Furthermore, the structural strength of the frame longitudinal beam 2 can be enhanced by increasing the thickness of the inner plate portion 23 and the outer plate portion 24.

[0055] Furthermore, the frame longitudinal beam 2 includes an inner panel portion 23 and an outer panel portion 24, and part of the frame longitudinal beam 2 is constructed as an arched structure 21. That is, a part of the inner panel portion 23 and a part of the outer panel portion 24 are both constructed to arch upwards, so that a part of the inner panel portion 23 and a part of the outer panel portion 24 can jointly form an arched structure 21. In turn, a clearance space 22 can be formed below the arched structure 21 to avoid interference between the drive shaft of the electric drive assembly and the frame longitudinal beam 2.

[0056] It should be noted that the arch structure 21 can be formed by stamping, and the other parts on the frame longitudinal beam 2 can be formed as one piece. In addition, the inner plate 23 and the outer plate 24 can be welded to the sleeve 7 along the circumference of the sleeve 7 to improve the connection reliability between the frame longitudinal beam 2 and the sleeve 7.

[0057] In some embodiments, the height difference between the highest point of the clearance space 22 and the lowest point of the front end of the frame longitudinal beam 2 is L2, and satisfies: 125mm≤L2≤145mm; and / or, the height of the arch structure 21 along the vertical direction of the vehicle is H, and satisfies: 70mm≤H≤80mm.

[0058] Specifically, part of the frame longitudinal beam 2 is constructed as an arched structure 21. The arched structure 21 is constructed to arch upward relative to the frame longitudinal beam 2 to form a clearance space 22 below the arched structure 21. The front end of the frame longitudinal beam 2 is lower than the middle of the frame longitudinal beam 2. That is, the height difference between the highest point of the clearance space 22 and the lowest point of the front end of the frame longitudinal beam 2 is greater than the vertical depth of the clearance space 22 in the vehicle, so as to facilitate the setting of the clearance space 22.

[0059] Furthermore, the height difference L2 between the highest point of the clearance space 22 and the lowest point of the front end of the frame longitudinal beam 2 can be between 125mm and 145mm, that is, L2 can be 130mm, 136mm or 140mm, etc., which can avoid L2 being too large or too small. If it is too large, the extension length of the frame longitudinal beam 2 along the vertical direction of the vehicle will be too large, which will result in a more complex overall structure and greater weight of the rear subframe 100, which is not conducive to the setting of the rear subframe 100, and will also lead to a reduction in the efficiency of longitudinal force transmission. Conversely, if it is too small, the extension length of the frame longitudinal beam 2 along the vertical direction of the vehicle will be too small, which is not conducive to the setting of the clearance space 22.

[0060] By rationally designing the height difference between the highest point of the clearance space 22 and the lowest point of the front end of the frame longitudinal beam 2, the vertical extension length of the frame longitudinal beam 2 along the vehicle can be minimized while ensuring that the drive shaft of the electric drive assembly does not interfere with the frame longitudinal beam 2. This makes the overall structure of the rear subframe 100 simpler and lighter, which is beneficial for the installation of the rear subframe 100 on the vehicle and can also help improve the efficiency of longitudinal force transmission.

[0061] Furthermore, part of the frame longitudinal beam 2 is constructed as an arch structure 21. That is, the arch structure 21, as part of the frame longitudinal beam 2, can be used to bear the weight of the vehicle body. The height of the arch structure 21 along the vertical direction of the vehicle is the height difference between the highest point of the arch structure 21 along the vertical direction of the vehicle and the intersection of the vertical line passing through the highest point and the lowest point of the arch structure 21. This can be used to represent the thickness of the arch structure 21. The height H of the arch structure 21 along the vertical direction of the vehicle can be between 70mm and 80mm, that is, H can be 72mm, 74mm or 76mm, etc., to avoid H being too large or too small. If it is too large, the size of the arch structure 21 will be too large, which will in turn lead to the size of the frame longitudinal beam 2 being too large, which is not conducive to the lightweighting of the rear subframe 100 and its installation on the vehicle. If it is too small, the load-bearing capacity of the arch structure 21 on the weight of the vehicle body will be reduced, which will in turn reduce the reliability of the frame longitudinal beam 2.

[0062] Thus, by rationally designing the height of the arch structure 21 along the vertical direction of the vehicle, the size of the frame longitudinal beam 2 can be reduced as much as possible while ensuring the ability to bear the weight of the vehicle body. This facilitates the lightweighting of the rear subframe 100 and its installation on the vehicle. Furthermore, the height of the arch structure 21 along the vertical direction of the vehicle can be flexibly set according to the modal, stiffness, and durability performance of the rear subframe 100.

[0063] Furthermore, it should be noted that the clearance space 22 is used to avoid the drive shaft of the electric drive assembly. That is, the size of the clearance space 22 is configured to be slightly larger than the motion envelope of the drive shaft of the electric drive assembly, ensuring that the drive shaft of the electric drive assembly can maintain a distance from the longitudinal beam 2 of the frame when it moves to its maximum position in any direction. Figure 2As shown, the longitudinal span of the clearance space 22 can be set to D2, which can be between 130mm and 150mm, i.e., D2 can be 135mm, 141mm, or 145mm, etc. This avoids D2 being too large or too small. If it is too large, the distance between the drive shaft of the electric drive assembly and the longitudinal beam 2 of the frame will be too large when it moves to its maximum position along the longitudinal direction of the vehicle. Although this can ensure that the drive shaft of the electric drive assembly will not interfere with the longitudinal beam 2 of the frame, it will lead to wasted space and also result in the arch structure 21 being too large, which is not conducive to the installation of the rear subframe 100 on the vehicle. Conversely, if it is too small, the drive shaft of the electric drive assembly will interfere with the longitudinal beam 2 of the frame when it moves along the longitudinal direction of the vehicle. The longitudinal span of the clearance space 22 is the distance between the horizontal plane where the drive shaft of the electric drive assembly is located in the stationary state and the two intersection points of the arch structure 21.

[0064] In some embodiments, there are two frame crossbeams 1, and the two frame crossbeams 1 are distributed at intervals along the longitudinal direction of the vehicle. The frame longitudinal beam 2 and at least one of the frame crossbeams 1 are provided with motor suspension mounting points 3.

[0065] Specifically, the frame crossbeam 1 is used to transmit and dissipate lateral forces. By constructing two frame crossbeams 1, the lateral forces can be transmitted together by the two frame crossbeams 1, thereby improving the reliability of lateral force transmission and dissipation. Furthermore, by distributing the two frame crossbeams 1 at intervals along the longitudinal direction of the vehicle, a certain distance can be maintained between the two frame crossbeams 1, allowing the two frame crossbeams 1 to transmit lateral forces simultaneously from two different positions, which can further improve the efficiency and reliability of lateral force transmission, enabling rapid transmission and dissipation of lateral forces.

[0066] It should be noted that both frame crossbeams 1 are connected between the two frame longitudinal beams 2, so that the two frame crossbeams 1 and the two frame longitudinal beams 2 together form the basic frame structure of the rear subframe 100, thereby improving the structural stability and operational reliability of the rear subframe 100.

[0067] Furthermore, motor mounting points 3 are provided on the longitudinal beams 2 and at least one of the cross beams 1 of the frame. The motor mounting points 3 are used to install the motor mount. That is, one motor mounting point 3 can be set on each of the two longitudinal beams 2, and one motor mounting point 3 can be set on one or two cross beams 1. That is, the number of motor mounting points 3 is at least three. Thus, the motor mount can be installed by using at least three motor mounting points 3 together, which can improve the reliability of the motor mount installation. Moreover, the at least three motor mounting points 3 are spaced apart, so that the motor mount can be installed from at least three positions at the same time, which can improve the stability of the motor mount installation.

[0068] For example, such as Figure 1 and Figure 3 As shown, there are three motor mounting points 3 on the front of the two frame crossbeams 1. The motor mount can be connected to the rear subframe 100 through the three spaced-apart motor mounting points 3, which can improve the reliability and stability of the motor mount installation.

[0069] It should be noted that the motor mount can be connected to the motor mount mounting point 3 by press fitting, and the motor mount is used to connect the electric drive assembly to the rear subframe 100. This allows the motor mount to be connected to both the rear subframe 100 and the electric drive assembly simultaneously, thereby enabling the installation of the electric drive assembly and ensuring its reliable operation. The connection can be made using connectors, such as bolts, to facilitate the installation or disassembly of various components. Furthermore, the specific positions of the three motor mount mounting points 3 on the frame crossbeam 1 and frame longitudinal beam 2 can be flexibly set according to the arrangement of surrounding components.

[0070] And, such as Figure 2 As shown, four control arm mounting brackets 6 are connected to each frame longitudinal beam 2 to fix the control arm. The control arm mounting brackets 6 can be welded to the frame longitudinal beam 2 to improve the reliability of the connection between the two. The control arm is used to connect the body and the wheel to transfer the force borne by the wheel to the body for distribution, thereby improving the ride comfort of the vehicle.

[0071] And, such as Figure 3 As shown, the width of the longitudinal beam 2 along the vehicle's transverse direction can be set as D, which can be between 90mm and 110mm, i.e., D can be 95mm, 100mm, or 115mm, etc., to avoid D being too large or too small. This way, while ensuring the load-bearing capacity of the vehicle body, the structural complexity and weight of the rear subframe 100 can be reduced as much as possible. Furthermore, the height of the longitudinal beam 2 along the vehicle's vertical direction can be constructed differently at various points on the longitudinal beam 2, and the transitions at various points on the longitudinal beam 2 can be uniform to reduce the possibility of the longitudinal beam 2 breaking due to stress concentration. The width of the longitudinal beam 2 along the vehicle's transverse direction and the height along the vehicle's vertical direction can be flexibly set according to the welding strength and durability of each welded part, the modal and stiffness of the rear subframe 100, and the arrangement of surrounding components.

[0072] This utility model also proposes a vehicle.

[0073] The vehicle according to the present invention includes an electric drive assembly and a rear subframe 100 of any of the above embodiments. The electric drive assembly is connected to the longitudinal beam 2 of the frame and at least one cross beam 1 of the frame via a motor. The drive shaft of the electric drive assembly passes through the clearance space 22.

[0074] Specifically, the electric drive assembly is connected to the wheels via a drive shaft to drive the wheels. The electric drive assembly is connected to the frame longitudinal beams 2 and at least one frame cross beam 1 via a motor mount. The electric drive assembly can be connected to two frame longitudinal beams 2 via a motor mount, and simultaneously connected to one or two frame cross beams 1. This enables the connection between the electric drive assembly and the rear subframe 100. Furthermore, the drive shaft of the electric drive assembly passes through the clearance space 22, allowing the electric drive assembly to be positioned between the two frame longitudinal beams 2. This allows the drive shaft of the electric drive assembly to pass through the clearance space 22 under the two arched structures 21 formed by the two frame longitudinal beams 2 to connect with the wheels. Thus, when the wheels vibrate, the vibration transmitted to the drive shaft of the electric drive assembly can be transmitted and dissipated through the rear subframe 100, thereby improving the ride comfort of the vehicle.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rear subframe, characterized in that, include: At least one frame crossbeam; Two frame longitudinal beams are distributed laterally across the vehicle, and at least one frame crossbeam is connected between the two frame longitudinal beams. At least a portion of the frame longitudinal beams is constructed as an arched structure, the arched structure being constructed to arch upwards to form a clearance space below the arched structure for clearing the drive shaft of the electric drive assembly. The arched structure is constructed such that the length extending forward and downward from the apex is greater than the length extending backward and downward from the apex, and the front end of the longitudinal beam of the frame is lower than the rear end of the longitudinal beam of the frame.

2. The rear subframe according to claim 1, characterized in that, The arched structure is located between the front end and the middle of the longitudinal beam of the vehicle frame, and the bottom surface of the front end and the bottom surface of the middle of the longitudinal beam of the vehicle frame are both lower than the bottom surface of the rear end of the longitudinal beam of the vehicle frame.

3. The rear subframe according to claim 1, characterized in that, The height difference L1 between the front end and the rear end of the frame longitudinal beam shall satisfy: 100mm≤L1≤120mm. And / or, the distance between the front end and the rear end of the frame longitudinal beam is d, and satisfies: 780mm≤d≤800mm.

4. The rear subframe according to claim 1, characterized in that, The inner wall of the avoidance space includes a front wall and a rear wall, which are connected to the inner apex of the avoidance space. Wherein, the extension length of the front wall surface is greater than the extension length of the rear wall surface.

5. The rear subframe according to claim 4, characterized in that, Both the front wall and the rear wall are constructed as curved surfaces, and the radius of curvature of the front wall is greater than that of the rear wall.

6. The rear subframe according to any one of claims 1-5, characterized in that, The front end of the longitudinal beam of the frame is provided with a front mounting point for the vehicle body, and the rear end of the longitudinal beam of the frame is provided with a rear mounting point for the vehicle body. The front mounting point for the vehicle body is lower than the rear mounting point for the vehicle body and both are used to connect to the vehicle body.

7. The rear subframe according to any one of claims 1-5, characterized in that, The frame longitudinal beam includes an inner plate portion and an outer plate portion. Both the inner plate portion and the outer plate portion are constructed in a groove shape. The inner plate portion and the outer plate portion are fastened together. A portion of the inner plate portion and a portion of the outer plate portion together form the arched structure.

8. The rear subframe according to any one of claims 1-5, characterized in that, The height difference between the highest point of the clearance space and the lowest point of the front end of the longitudinal beam of the frame is L2, and satisfies: 125mm≤L2≤145mm; And / or, the height of the arched structure along the vertical direction of the vehicle is H, and satisfies: 70mm≤H≤80mm.

9. The rear subframe according to any one of claims 1-5, characterized in that, There are two frame crossbeams, and the two frame crossbeams are distributed at intervals along the longitudinal direction of the vehicle. The frame longitudinal beam and at least one of the frame crossbeams are provided with motor suspension mounting points.

10. A vehicle, characterized in that, The vehicle includes an electric drive assembly and a rear subframe as described in any one of claims 1-9, wherein the electric drive assembly is connected to the longitudinal beams of the frame and at least one of the cross beams of the frame via a motor mount, and the drive shaft of the electric drive assembly extends through the clearance space.

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