Rear auxiliary frame and vehicle

Abstract

The utility model provides a rear auxiliary frame and a vehicle, the rear auxiliary frame comprises a front cross beam, a rear cross beam and two frame longitudinal beams, the front cross beam and the rear cross beam are spaced along the longitudinal direction of the vehicle; the two frame longitudinal beams are distributed in the transverse direction of a vehicle in a spaced mode and connected between the front cross beam and the rear cross beam so as to jointly define an electric drive containing space. Wherein a steering gear mounting part is arranged on the rear side of the rear cross beam, a steering gear avoiding hole which is opened backwards is formed in the rear cross beam, the steering gear mounting part is used for mounting a rear wheel steering gear, and the steering gear avoiding hole is used for avoiding at least part of the rear wheel steering gear. According to the rear auxiliary frame, the steering gear mounting part and the steering gear avoiding hole are arranged on the rear cross beam of the rear auxiliary frame, so that the rear cross beam is connected with the rear wheel steering gear on the basis of ensuring the strength, the integration level of the rear auxiliary frame and the rear wheel steering gear is improved, and the space is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a rear subframe and vehicle. BACKGROUND

[0002] The subframe of the vehicle is not a complete frame, but a support for the front and rear axles and suspension, which connects the axles and suspension to the main frame.

[0003] The rear subframe of the vehicle is an important part of the automobile chassis, mainly serving to support and connect the rear suspension system, but the function of the rear beam of the rear subframe is single, resulting in a large space occupied when other structures are installed on the rear subframe, and there is room for improvement. SUMMARY

[0004] The utility model aims at least solves one of the prior art technical problems existing in the prior art. Therefore, the utility model provides a rear subframe, the rear beam of the rear subframe is provided with a steering gear mounting portion and a steering gear avoiding hole, so that the rear beam is connected to the rear wheel steering gear on the basis of ensuring the strength, the integration of the rear subframe and the rear wheel steering gear is improved, and space is saved.

[0005] The rear subframe according to the utility model embodiment comprises a front beam, a rear beam and two frame longitudinal beams, the front beam and the rear beam are spaced apart along the longitudinal direction of the vehicle, the two frame longitudinal beams are distributed along the transverse direction of the vehicle and are connected between the front beam and the rear beam to jointly define an electric drive containing space, wherein the rear side of the rear beam is provided with a steering gear mounting portion, the rear beam is formed with a steering gear avoiding hole that is open rearward, the steering gear mounting portion is used for mounting a rear wheel steering gear, and the steering gear avoiding hole is used for avoiding at least part of the rear wheel steering gear.

[0006] The rear subframe according to the utility model embodiment first realizes integrated installation between the drive motor and the rear subframe through the electric drive containing space defined between the front beam, the rear beam and the two frame longitudinal beams, and the rear wheel steering gear is arranged at the rear beam, so that the structural characteristics of the rear beam can be fully utilized on the basis of ensuring the strength of the rear beam, the integration is high and space is saved.

[0007] The rear subframe according to the utility model embodiment, at least part of the rear wheel steering gear is located at the rear side of the rear beam, the rear side wall of the rear beam is formed with an avoiding groove, the avoiding groove is communicated with the steering gear avoiding hole along the transverse direction of the vehicle, the rear wheel steering gear is provided with a steering gear yoke, and the avoiding groove is used for avoiding the steering gear yoke.

[0008] According to the rear subframe of the utility model embodiment, two said avoidance grooves are respectively communicated with two sides of said steering gear avoidance hole along the transverse direction of the vehicle, both of said avoidance grooves are configured as arc grooves, and the radius of both of said avoidance grooves is respectively R1 and R2, and satisfies: 30mm≤R1≤40mm, 40mm≤R1≤50mm.

[0009] According to the rear subframe of the utility model embodiment, a plurality of said steering gear mounting portions are arranged, at least part of said steering gear mounting portions are distributed on both sides in the height direction of said avoidance grooves, and at least part of said steering gear mounting portions are distributed on both sides in the transverse direction of said steering gear avoidance hole.

[0010] According to the rear subframe of the utility model embodiment, the distance between the outer wall of said steering gear avoidance hole where said rear wheel steering gear extends into and the inner wall of said steering gear avoidance hole is A, and satisfies: 4mm≤A≤6mm.

[0011] According to the rear subframe of the utility model embodiment, the width of said steering gear avoidance hole along the transverse direction of the vehicle is D1, and satisfies: 270mm≤D1≤280mm; and / or, the maximum distance between the upper wall and the lower wall of said steering gear avoidance hole is D2, and satisfies: 140mm≤D2≤150mm; and / or, the minimum distance between the upper wall and the lower wall of said steering gear avoidance hole is D3, and satisfies: 110mm≤D3≤130mm.

[0012] According to the rear subframe of the utility model embodiment, the width of said rear cross beam along the front-rear direction of the vehicle is D4, and satisfies: 60mm≤D4≤80mm; and / or, the height of said rear cross beam along the height direction of the vehicle is D5, and satisfies: 220mm≤D5≤240mm.

[0013] According to the rear subframe of the utility model embodiment, said rear cross beam is further provided with an avoidance opening on one side in the transverse direction of said steering gear avoidance hole, said avoidance opening is adapted to be through in the front-rear direction and used for avoiding the exhaust pipe of the engine.

[0014] According to the rear subframe of the utility model embodiment, said rear cross beam is configured as an integral molding.

[0015] The utility model embodiment further provides a vehicle comprising the rear subframe.

[0016] The vehicle has the same advantages as the prior art and the rear subframe, which will not be repeated here.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or will be understood by the practice of the utility model. 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 schematic diagram of the structure of the rear subframe of this utility model, in which a drive motor and a reducer are mounted;

[0020] Figure 2 This is a structural schematic diagram of the rear subframe from one angle according to an embodiment of the present invention;

[0021] Figure 3 This is a structural schematic diagram of the rear subframe from another angle according to an embodiment of the present invention;

[0022] Figure 4 This is a rear view of the rear crossbeam of the rear subframe according to an embodiment of the present utility model.

[0023] Figure label:

[0024] Subframe 100, electric drive assembly 101, drive shaft 102, rear wheel steering gear 103, steering gear fork 1031, front crossbeam 1, front electric drive mount point 11, rear crossbeam 2, steering gear clearance hole 21, steering gear mounting part 22, clearance groove 23, clearance notch 24, toe-in adjustment clearance hole 25, frame longitudinal beam 3, inner panel part 31, outer panel part 32, rear electric drive mount point 33, front body mounting part 34, rear body mounting part 35, electric drive housing space 4, arched structure 5, clearance space 51. Detailed Implementation

[0025] 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.

[0026] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0027] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Unless otherwise specified, the front and rear directions in this application are the longitudinal direction of the vehicle, that is, the X direction, the left and right directions are the lateral direction of the vehicle, that is, the Y direction, and the up and down directions are the vertical direction of the vehicle, that is, the Z direction.

[0029] The following refers to Figures 1-4 The rear subframe 100 according to an embodiment of the utility model is described, the rear cross beam 2 of the rear subframe 100 is provided with a steering gear mounting portion 22 and a steering gear avoiding hole 21, so that the rear cross beam 2 has the function of connecting the rear wheel steering gear 103, and has high integration and saves the space in the front and rear directions of the vehicle on the basis of ensuring the strength of the rear cross beam 2.

[0030] As Figures 1-4 The rear subframe 100 according to an embodiment of the utility model includes: a front cross beam 1, a rear cross beam 2 and two frame longitudinal beams 3.

[0031] The front cross beam 1 and the rear cross beam 2 are spaced apart along the longitudinal direction of the vehicle, the two frame longitudinal beams 3 are spaced apart along the lateral direction of the vehicle and are connected between the front cross beam 1 and the rear cross beam 2 to jointly define an electric drive containing space 4, the rear side of the rear cross beam 2 is provided with a steering gear mounting portion 22, and the rear cross beam 2 is formed with a steering gear avoiding hole 21 that is open rearward, the steering gear mounting portion 22 is used for mounting the rear wheel steering gear 103, and the steering gear avoiding hole 21 is used for avoiding at least part of the rear wheel steering gear 103.

[0032] In practice, the auxiliary frame 100 is a frame structure surrounded by the front cross beam 1, the rear cross beam 2 and the two frame longitudinal beams 3, the auxiliary frame 100 is integrally installed below the rear of the vehicle, and the two frame longitudinal beams 3 of the auxiliary frame 100 are at least partially in the arched structure 5, for example, the arched structure 5 can be arranged at the front part of the frame longitudinal beam 3, the frame longitudinal beam 3 of the arched structure 5 has good stability and good buffering capacity, can effectively absorb and disperse impact force, and the arched structure 5 can uniformly transmit the gravity load to different positions, so that the whole structure can bear greater force, and the strength is improved.

[0033] In addition, the two frame longitudinal beams 3, the front cross beam 1 and the rear cross beam 2 form the electric drive containing space 4, the electric drive containing space 4 can contain the electric drive assembly 101, the electric drive assembly 101 includes a reducer, a drive motor and a controller of the drive motor, and the drive motor is power-connected to the drive shaft 102 through the reducer, the drive shaft 102 extends into the avoiding space 51 formed at the bottom of the arched structure 5, thereby improving the overall strength of the rear auxiliary frame 100 and the integration of the electric drive assembly 101 and the rear auxiliary frame 100.

[0034] In addition, the two frame longitudinal beams 3, the front cross beam 1 and the rear cross beam 2 form the electric drive containing space 4, the electric drive containing space 4 can contain the electric drive assembly 101, the electric drive assembly 101 includes a reducer, a drive motor and a controller of the drive motor, and the drive motor is power-connected to the drive shaft 102 through the reducer, the drive shaft 102 extends into the avoiding space 51 formed at the bottom of the arched structure 5, thereby improving the overall strength of the rear auxiliary frame 100 and the integration of the electric drive assembly 101 and the rear auxiliary frame 100.

[0035] Specifically, the rear wheel steering gear 103 is installed at the rear side of the rear cross beam 2 of the rear auxiliary frame 100 and at least partially located at the steering gear avoiding hole 21 of the rear cross beam 2, so that the rear wheel steering gear 103 and the rear cross beam 2 partially overlap in the front-rear direction of the vehicle, thereby reducing the size in the front-rear direction and improving the integration; in addition, the rear wheel steering gear 103 makes the rear wheel more flexible during steering, thereby improving the controllability and stability of the vehicle, and installing the rear wheel steering gear 103 on the rear cross beam 2 of the rear auxiliary frame 100 can optimize the space layout of the vehicle, and the rear wheel steering gear 103 does not occupy too much rear wheel space, thereby maintaining the space utilization rate of the vehicle interior and the trunk.

[0036] In some embodiments, at least part of the rear wheel steering gear 103 is located at the rear side of the rear cross beam 2, the rear side wall of the rear cross beam 2 is formed with an avoiding groove 23, the avoiding groove 23 is communicated with the steering gear avoiding hole 21 in the vehicle transverse direction, and the rear wheel steering gear 103 is provided with a steering gear yoke 1031, and the avoiding groove 23 is used to avoid the steering gear yoke 1031.

[0037] That is, when the avoiding groove 23 and the steering gear avoiding hole 21 are communicated, both the avoiding groove 23 and the steering gear avoiding hole 21 can be used to accommodate the partial structure of the rear wheel steering gear 103, such as the steering gear yoke 1031 of the rear wheel steering gear 103 extending in the vehicle transverse direction. The main function of the steering gear yoke 1031 is to connect the ball pin and the tie rod of the vehicle, and the steering gear yoke 1031 is responsible for transmitting the steering torque from the front to the hub to make the wheel deflect. Therefore, by providing the avoiding groove 23, and the avoiding groove 23 can extend in the transverse direction of the rear cross beam 2, the steering gear yoke 1031 is avoided, the integration of the rear cross beam 2 and the rear wheel steering gear 103 is improved, and part of the steering gear yoke 1031 is located in the avoiding groove 23, which is equivalent to increasing the strength of the rear cross beam 2 and improving the anti-collision effect of the rear cross beam 2.

[0038] In some embodiments, the avoiding groove 23 is provided with two, and the two avoiding grooves 23 are respectively communicated with the two sides of the steering gear avoiding hole 21 in the vehicle transverse direction, the two avoiding grooves 23 are both arc-shaped grooves, and the radii of the two avoiding grooves 23 are respectively R1 and R2, and satisfy: 30mm≤R1≤40mm, 40mm≤R1≤50mm.

[0039] Referring to Figure 3 , the two avoiding grooves 23 are distributed on the two sides of the steering gear avoiding hole 21 in the transverse direction of the rear cross beam 2, that is, the steering gear yoke 1031 extends in the transverse direction of the rear cross beam 2 and is partially located in the two avoiding grooves 23 and the steering gear avoiding hole 21, thereby realizing good integration effect between the rear steering gear 103 and the rear cross beam 2. At the same time, the radius of the avoiding groove 23 on the left side of the steering gear avoiding hole 21 is 34.3mm, and of course it can also be 36mm, 37mm, etc. The radius of the avoiding groove 23 on the right side of the steering gear avoiding hole 21 is 47.062mm, and of course it can also be 47.5mm, 48mm, etc., thereby realizing the size of the avoiding groove 23 can be adapted to the different outer circumferential size of the steering gear yoke 1031.

[0040] Further, as Figure 3 shown, the avoiding groove 23 can be located at the middle position in the height direction of the steering gear avoiding hole 21, that is, the steering gear yoke 1031 is also located at the middle position in the height direction of the steering gear avoiding hole 21, thereby improving the stability and uniformity of the stress. Moreover, in the design, the steering gear avoiding hole 21 is also arranged at the middle position in the transverse direction of the rear cross beam 2, thereby ensuring the uniformity of the stress.

[0041] In addition, since the two frame longitudinal beams 3 are respectively provided with rear electric drive suspension mounting points 33, and the front cross beam 1 is provided with a front electric drive suspension mounting point 11, the entire electric drive assembly 101 is connected to the two rear electric drive suspension mounting points 33 and the front electric drive suspension mounting point 11, the electric drive assembly 101 is located on the front side of the rear cross beam 2 and leaves a space between the rear cross beam 2, and the rear side of the rear cross beam 2 is connected to the rear wheel steering gear 103, thereby improving the stress uniformity of the entire rear subframe 100.

[0042] In some embodiments, the steering gear mounting portions 22 are arranged in multiple, at least part of the steering gear mounting portions 22 are arranged on both sides in the height direction of the two avoiding grooves 23, and at least part of the steering gear mounting portions 22 are arranged on both sides in the transverse direction of the steering gear avoiding hole 21.

[0043] Continuing to refer to Figure 3 As shown, the steering gear mounting portion 22 is a hollow stud, and the hollow stud can be arranged in four, the four studs are respectively arranged on four different positions of the steering gear avoiding hole 21, such as one stud on the upper left and upper right of the steering gear avoiding hole 21, and one stud on the lower left and lower right of the steering gear avoiding hole 21, so that when the rear wheel steering gear 103 is mounted on the rear cross beam 2, the rear wheel steering gear 103 is at least uniformly stressed around the steering gear avoiding hole 21, thereby ensuring the stability of the rear wheel steering gear 103.

[0044] In some embodiments, the distance between the outer wall of the rear wheel steering gear 103 extending into the steering gear avoiding hole 21 and the inner wall of the steering gear avoiding hole 21 is A, and satisfies: 4mm≤A≤6mm.

[0045] In practice, the steering gear avoiding hole 21 forms a cavity structure at the rear cross beam 2, and the cavity structure has an outer shape matching the size of the rear wheel steering gear 103, such as a gap of about 5mm with the boundary of the rear wheel steering gear 103. By setting the gap, the long-term vibration collision between the outside of the rear wheel steering gear 103 and the rear cross beam 2 is avoided, and wear and tear is avoided. When disassembling the rear wheel steering gear 103, a disassembly space is left due to the gap between the rear wheel steering gear 103 and the rear cross beam 2, and disassembly is easy.

[0046] In some embodiments, the width of the steering gear avoiding hole 21 in the transverse direction of the vehicle is D1, and satisfies: 270mm≤D1≤280mm; and / or, the maximum distance between the upper wall and the lower wall of the steering gear avoiding hole 21 is D2, and satisfies: 140mm≤D2≤150mm; and / or, the minimum distance between the upper wall and the lower wall of the steering gear avoiding hole 21 is D3, and satisfies: 110mm≤D3≤130mm.

[0047] For example, the width of the steering gear clearance hole 21 along the vehicle's lateral direction can be set to 275.5mm, or it can be 276mm, 277mm, etc. By setting the width of the steering gear clearance hole 21, the protruding structure of the rear wheel steering gear 103 can be more fully inserted into the steering gear clearance hole 21, thereby achieving a better space-saving effect. The maximum distance between the upper and lower walls of the steering gear clearance hole 21 can be set to 145.5mm. By limiting the maximum distance between the upper and lower walls of the steering gear clearance hole 21, it can fit the outer contour of the protruding part of the rear wheel steering gear 103. The minimum distance between the upper and lower walls of the steering gear clearance hole 21 can be set to 117.122mm, that is, the steering gear clearance hole 21 is an irregular hole, so that the outer contour of the steering gear can fit the steering gear clearance hole 21, and at the same time, the steering gear clearance hole 21 is not set too large and affects the strength of the rear crossbeam 2. That is, it satisfies the clearance of the rear wheel steering gear 103 while ensuring the strength of the rear crossbeam 2.

[0048] In some embodiments, the width of the rear crossbeam 2 along the vehicle's front-rear direction is D4, and satisfies: 60mm≤D4≤80mm; and / or, the height of the rear crossbeam 2 along the vehicle's height direction is D5, and satisfies: 220mm≤D5≤240mm.

[0049] In practice, refer to Figure 2 and Figure 4 As shown, the rear crossbeam 2 has a width of 69mm and a height of 233.5mm. By limiting the height of the rear crossbeam 2, combined with the aforementioned limitation on the size of the steering gear clearance hole 21, a suitable distance is maintained between the upper wall of the steering gear clearance hole 21 and the top of the rear crossbeam 2, thus ensuring the strength of the rear crossbeam 2. Furthermore, by limiting the width of the rear crossbeam 2—meaning that its width along the vehicle's longitudinal direction should neither be too large nor too small—both lightweight requirements are met while maintaining the strength of the rear crossbeam 2.

[0050] In some embodiments, the rear crossbeam 2 is further provided with a clearance notch 24 on one side of the steering gear clearance hole 21 in the lateral direction. The clearance notch 24 is adapted to pass through in the front-rear direction and is used to clear the exhaust pipe of the engine.

[0051] like Figure 4 As shown, the cross-sectional height of the rear crossbeam 2 above the clearance notch 24 is D6, which is 170.2mm. The exhaust pipe of the rear subframe 100 is commonly referred to as the exhaust pipe or tailpipe. The exhaust pipe connects the engine at the front of the vehicle and the muffler at the rear, and is used to exhaust the exhaust gases produced by the engine. This design increases the integration between the exhaust pipe and the rear crossbeam 2, saving space. In addition, the clearance notch 24 can be designed with an arc-shaped structure, which better fits the outer edge of the exhaust pipe and reduces wear on the exhaust pipe.

[0052] In some embodiments, the rear cross beam 2 is configured to be integrally formed; the rear cross beam 2 of the rear subframe 100 is configured to be integrally formed, which can improve the strength and rigidity of the vehicle body, reduce the weight, improve the overall comfort of the vehicle, and improve the lateral and longitudinal rigidity. As the integrally formed rear cross beam 2 is connected to the inner side of the frame rail 3 at a portion of the end in the transverse direction of the vehicle and connected to the bottom of the frame rail 3 at another portion, the reliability and stability of the connection between the frame rail 3 and the rear cross beam 2 are improved.

[0053] It should be further noted that, as shown in Figure 3 The rear side of the rear cross beam 2 is also provided with a toe adjustment avoidance hole 25 penetrating in the front-rear direction, which is used to avoid the adjusting tool for adjusting the rear suspension toe rod.

[0054] In practice, the rear suspension toe rod can be connected between the rear wheel steering gear 103 and the steering knuckle, and the main purpose of adjusting the rear suspension toe rod is to ensure the driving stability, maneuverability and uniformity of tire wear of the vehicle. The adjustment of the rear suspension toe rod has a significant impact on the performance of the vehicle, and the adjusting tool can be easily inserted through the toe adjustment avoidance hole 25 to adjust the rear suspension toe rod, and the flexibility of adjustment is high. The adjusting tool can generally be a toe wrench, which is a tool specially used for adjusting the toe, and is usually used for manually adjusting the toe value of the vehicle wheel.

[0055] It should be further noted that the frame rail 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 press-fitted and assembled, and a portion of the inner plate portion 31 and a portion of the outer plate portion 32 jointly form the arch-shaped structure 5.

[0056] In practice, the inner plate portion 31 and the outer plate portion 32 can be stamping formed in the middle, which improves the integrity of the frame rail 3 and is suitable for complex-shaped parts: stamping forming can manufacture complex parts with thin walls, light weight, high rigidity and high surface quality, which are suitable for workpieces of various shapes and sizes; and the inner plate portion 31 and the outer plate portion 32 are both configured to be groove-shaped, so that the groove-shaped inner plate portion 31 and the outer plate portion 32 are directly stamping formed, so that the inside of the frame rail 3 is a hollow structure, which reduces the weight of the frame rail 3 and achieves the effect of light weight.

[0057] The utility model embodiment further provides a vehicle, including above -mentioned rear subframe 100, rear cross beam 2 is configured to be integrally formed, and rear cross beam 2 of rear subframe 100 is provided with steering gear mounting portion 22 and steering gear avoidance hole 21, make rear cross beam 2 have the effect of connecting rear wheel steering gear 103, on the basis of guaranteeing the strength of rear cross beam 2, and high integration degree and save space, improve the integration degree and overall strength of rear subframe 100.

[0058] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A rear subframe, characterized in that, include: A front crossbeam and a rear crossbeam, the front crossbeam and the rear crossbeam being spaced apart along the longitudinal direction of the vehicle; Two frame longitudinal beams are distributed laterally along the vehicle and are both connected between the front crossbeam and the rear crossbeam to jointly define the electric drive accommodation space. The rear crossbeam has a steering gear mounting portion on its rear side, and the rear crossbeam has a rearward-opening steering gear clearance hole. The steering gear mounting portion is used to mount the rear wheel steering gear, and the steering gear clearance hole is used to clear at least a portion of the rear wheel steering gear.

2. The rear subframe according to claim 1, characterized in that, At least a portion of the rear wheel steering gear is located on the rear side of the rear crossbeam, and the rear sidewall of the rear crossbeam has a clearance groove that communicates laterally with the steering gear clearance hole along the vehicle. The rear wheel steering gear is provided with a steering gear fork, and the clearance groove is used to avoid the steering gear fork.

3. The rear subframe according to claim 2, characterized in that, The avoidance groove is provided in two parts, 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. Both avoidance grooves are constructed as arc grooves, and the radii of the two avoidance grooves are respectively set as R1 and R2, and satisfy: 30mm≤R1≤40mm, 40mm≤R1≤50mm.

4. The rear subframe according to claim 3, characterized in that, The steering gear mounting parts are configured as a plurality of them, at least some of the steering gear mounting parts are spaced apart on both sides of the height direction of the two clearance slots, and at least some of the steering gear mounting parts are spaced apart on both sides of the lateral direction of the steering gear clearance hole.

5. The rear subframe according to claim 1, characterized in that, The distance between the outer wall of the rear wheel steering gear extending into the steering gear clearance hole and the inner wall of the steering gear clearance hole is set as A, and satisfies: 4mm≤A≤6mm.

6. The rear subframe according to claim 1, characterized in that, The width of the steering gear clearance hole along the vehicle's lateral direction is set as D1, and satisfies: 270mm≤D1≤280mm; And / or, the maximum distance between the upper and lower walls of the steering gear clearance hole is set to D2, and satisfies: 140mm≤D2≤150mm; And / or, the minimum distance between the upper and lower walls of the steering gear clearance hole is set to D3, and satisfies: 110mm≤D3≤130mm.

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

8. The rear subframe according to claim 1, characterized in that, The rear crossbeam is also provided with a clearance notch on one side of the steering gear clearance hole in the transverse direction. The clearance notch is adapted to pass through in the front-rear direction and is used to avoid the exhaust pipe of the engine.

9. The rear subframe according to claim 1, characterized in that, The rear crossbeam is constructed as a single piece.

10. A vehicle, characterized in that, Includes the rear subframe as described in any one of claims 1-9.

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