Rear subframe and vehicle

Abstract

The application provides a rear subframe and a vehicle, and relates to the technical field of automobiles. The rear subframe comprises a first longitudinal beam, a second longitudinal beam, a first cross beam and a second cross beam. The first longitudinal beam comprises a first body part, a first connecting part and a second connecting part. The second longitudinal beam is symmetrically arranged with the first longitudinal beam along a first direction. The second longitudinal beam comprises a second body part, a third connecting part and a fourth connecting part. The two ends of the first cross beam along the first direction are respectively inserted into the first connecting part and the third connecting part. The second cross beam is oppositely arranged with the first cross beam along a second direction. The two ends of the second cross beam along the first direction are respectively inserted into the second connecting part and the fourth connecting part. Therefore, when being installed, the exposed lengths of the first cross beam and the second cross beam can be adjusted based on motors of different sizes, so that the rear subframe can be applied to vehicles of different sizes, the adaptability of the rear subframe is improved, and the development of multiple vehicle models of the same platform is facilitated.

Description

Technical Field

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

[0002] In vehicle chassis system development, the rear subframe, as a core structural component supporting the drive motor, suspension, and steering system, directly impacts the overall vehicle performance and development efficiency. Existing rear subframes typically suffer from the following problems: 1. Existing rear subframes often rely on customized vehicle development, resulting in low component platformization rates during whole-vehicle platform development, leading to high development costs and long development cycles; 2. For high-power motors, existing rear subframe designs are limited in space, unable to accommodate motors of different sizes, while new development designs bring higher costs and longer cycles; 3. Existing rear subframes do not provide sufficient space for the rear-wheel steering system, resulting in efficiency and steering angles failing to meet expectations. Therefore, providing a more adaptable rear subframe to improve manufacturing efficiency is a pressing technical problem in the automotive industry. Utility Model Content

[0003] The purpose of this application is to provide a rear subframe and vehicle to solve the technical problem of poor adaptability of the rear subframe in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] In a first aspect, this application provides a rear subframe, comprising: a first longitudinal beam, a second longitudinal beam, a first crossbeam, and a second crossbeam. The first longitudinal beam includes a first body portion, a first connecting portion, and a second connecting portion. The second longitudinal beam is symmetrically arranged with respect to the first longitudinal beam along a first direction, and includes a second body portion, a third connecting portion, and a fourth connecting portion. The two ends of the first crossbeam along the first direction are respectively inserted into the first connecting portion and the third connecting portion, and are respectively fixedly connected to the first connecting portion and the third connecting portion. The second crossbeam is arranged opposite to the first crossbeam along a second direction, and the two ends of the second crossbeam along the first direction are respectively inserted into the second connecting portion and the fourth connecting portion, and are respectively fixedly connected to the second connecting portion and the fourth connecting portion. Reinforcing members are provided inside the first crossbeam and / or the second crossbeam, and the first direction and the second direction intersect.

[0006] In one or more embodiments of this application, the first crossbeam has stepped structures at both ends along a first direction. The first crossbeam is inserted into and welded to the first and third connecting portions via the stepped structures. In a third direction, both the first and third connecting portions include a straight section and an inclined section. The inclined section slopes from the connection point with the first or second body portion toward the straight section to form a first clearance space above the first crossbeam. The first, second, and third directions intersect each other. And / or,

[0007] The second crossbeam forms stepped structures at both ends along the first direction. The second crossbeam is inserted into the second connecting part and the fourth connecting part through the stepped structures, and is welded to the second connecting part and the fourth connecting part respectively.

[0008] In one or more embodiments of this application, a reinforcing member is provided inside the first crossbeam, the reinforcing member extending from one end of the first crossbeam to the other end along a first direction, and the reinforcing member is fixedly connected to the two side walls of the first crossbeam in a second direction and the two side walls in a third direction, respectively; and / or,

[0009] When the second crossbeam is provided with a reinforcing member, the reinforcing member extends from one end of the second crossbeam to the other end along the first direction, and the reinforcing member is fixedly connected to the two side walls of the second crossbeam in the second direction and the two side walls in the third direction respectively.

[0010] In one or more embodiments of this application, the reinforcing member has a rhomboid structure in a cross section perpendicular to the first direction.

[0011] In one or more embodiments of this application, along the second direction, the second crossbeam has a first recess on the side opposite to the first crossbeam. The first recess is formed by the sidewall of the second crossbeam being recessed towards the interior of its hollow structure. Along the first direction, the length of the first recess is consistent with the length of the first crossbeam.

[0012] Along a third direction, the second crossbeam has a second recess, which is located on the side opposite to the direction of the first clearance space.

[0013] In one or more embodiments of this application, the second connecting portion and the fourth connecting portion are provided with a third recess corresponding to the first recess. When the second crossbeam is fixedly connected to the second connecting portion and the fourth connecting portion, the first recess and the third recess form a second clearance space. The second connecting portion and the fourth connecting portion are provided with a mounting boss at the corner of the third recess. The mounting boss protrudes from the surface of the second connecting portion and the fourth connecting portion.

[0014] In one or more embodiments of this application, the first longitudinal beam further includes a first extension, which extends in a first direction away from the first connecting portion;

[0015] The second longitudinal beam also includes a third extension, which extends in a direction away from the third connecting part along the first direction; a front bushing sleeve is provided on the first extension and the third extension.

[0016] A first control arm mounting bracket is provided at the bottom of both the first extension and the third extension, and a notch is provided between the two oppositely arranged first control arm mounting brackets. The notch is connected to the hollow structure inside the first longitudinal beam and the second longitudinal beam.

[0017] In one or more embodiments of this application, a second control arm mounting bracket is provided at the top of both the first extension and the third extension. The second control arm mounting bracket is inclined upward. A third control arm mounting bracket is provided on both the first body and the second body. The third control arm mounting bracket is horizontally arranged. Along the third direction, the bottoms of the first body and the second body are recessed into their hollow structures to form a third clearance space.

[0018] In one or more embodiments of this application, the first longitudinal beam further includes a second extension portion. The first extension portion and the second extension portion are respectively disposed at both ends of the first body portion along the second direction. The second extension portion extends in a direction away from the second connecting portion and the first extension portion. The second extension portion is set at an angle with the first direction and the second direction.

[0019] The second longitudinal beam also includes a fourth extension. The third and fourth extensions are respectively located at both ends of the second body part along the second direction. The fourth extension extends in a direction away from the fourth connecting part and the third extension. The fourth extension is set at an angle with the first and second directions.

[0020] The second and fourth extensions are provided with rear bushing sleeves.

[0021] Secondly, this application provides a vehicle including the rear subframe described in any of the first aspects above.

[0022] Based on the above technical solution, the rear subframe and vehicle of this application have at least the following beneficial technical effects:

[0023] The rear subframe of this application connects the two ends of the first crossbeam along a first direction to the first connecting portion of the first longitudinal beam and the third connecting portion of the second longitudinal beam, and connects the two ends of the second crossbeam along the first direction to the second connecting portion of the first longitudinal beam and the fourth connecting portion of the second longitudinal beam. Therefore, during installation, the insertion lengths of the first and second crossbeams into the first and second longitudinal beams can be adjusted based on motors of different sizes, thereby adjusting the exposed lengths of the first and second crossbeams. This allows the installation space of the rear subframe, composed of the first longitudinal beam, the second longitudinal beam, the first crossbeam, and the second crossbeam, to be suitable for vehicles of different sizes, improving the adaptability of the rear subframe and facilitating the development of multiple models on the same platform. Furthermore, by incorporating reinforcing members within the first and second crossbeams, the strength and rigidity of the first and second crossbeams can be improved. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a top view of the rear subframe structure provided in the embodiments of this application.

[0026] Figure 2 This is a three-dimensional structural diagram of the rear subframe provided in the embodiments of this application.

[0027] Figure 3 This is a three-dimensional structural diagram of the rear subframe from the bottom view provided in the embodiments of this application.

[0028] Figure 4 This is a longitudinal cross-sectional view of the connection method between the first crossbeam and the first and third connecting parts in the rear subframe provided in this application embodiment.

[0029] Figure 5 This is a three-dimensional structural diagram of the first crossbeam in the rear subframe provided in the embodiments of this application.

[0030] Figure 6 This is a schematic diagram of the main view of the first crossbeam in the rear subframe provided in the embodiment of this application.

[0031] Figure 7 This is a side view of the first crossbeam in the rear subframe provided in this embodiment of the application.

[0032] Figure 8 This is a three-dimensional structural diagram of the second crossbeam in the rear subframe provided in the embodiments of this application.

[0033] Figure 9 This is a three-dimensional structural diagram of the second longitudinal beam in the rear subframe provided in the embodiments of this application.

[0034] Figure 10 This is a three-dimensional structural schematic diagram of the second longitudinal beam in the rear subframe provided in the embodiments of this application, from another perspective.

[0035] Figure 11 This is a schematic diagram of the connection structure between the rear subframe and the rear wheel steering system provided in the embodiments of this application.

[0036] Figure 12 yes Figure 11 BB cross-section diagram.

[0037] Figure 13 This is a side structural diagram of the connection between the rear subframe and the rear wheel steering system provided in the embodiments of this application.

[0038] In the diagram: 1-First longitudinal beam; 2-Second longitudinal beam; 3-First crossbeam; 4-Second crossbeam; 5-Rear wheel steering system; 10-First control arm mounting bracket; 11-First body part; 12-First connecting part; 13-Second connecting part; 14-First extension part; 15-Second extension part; 16-Front bushing sleeve; 17-Rear bushing sleeve; 18-Second control arm mounting bracket; 19-Third control arm mounting bracket; 20-Mounting boss; 21-Second body part; 22-Third connecting part; 23-Fourth connecting part; 24-Third extension part; 25-Fourth extension part; 26-Third recessed part; 31-Step structure; 32-Reinforcing member; 41-First recessed part; 42-Second recessed part; 100-Notch; 101-First clearance space; 102-Second clearance space; 103-Third clearance space; 121-Straight section; 122-Inclined section; 171-Positioning member. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] During the development of a complete vehicle, the dimensions of the rear subframe of related technologies are usually not adjustable, which leads to insufficient platformization of parts. When the motor size is too large, the subframe cannot be universal, which brings high costs and time investment to the development of the complete vehicle.

[0044] Based on the above considerations, in order to solve the technical problem of low adaptability of the rear subframe in the prior art, this application provides a rear subframe and a vehicle.

[0045] It should be noted that the first direction X, the second direction Y, and the third direction Z described in this application intersect each other. In some embodiments, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. In some embodiments, the first direction X described in this application can be the width direction of the rear subframe, that is, the width direction of the vehicle; the second direction Y can be the length direction of the rear subframe, that is, the length direction of the vehicle; and the third direction Z can be the height direction of the rear subframe, that is, the height direction of the vehicle.

[0046] The technical solutions of the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0047] Please refer to the following: Figure 1 and Figure 2This application provides a rear subframe, including: a first longitudinal beam 1, a second longitudinal beam 2, a first crossbeam 3, and a second crossbeam 4. The first longitudinal beam 1 includes a first body portion 11, a first connecting portion 12, and a second connecting portion 13. The first connecting portion 12 and the second connecting portion 13 are respectively located at both ends of the first body portion 11 along a second direction Y, and extend along a first direction X in a direction away from the first body portion 11. The second longitudinal beam 2 is symmetrically arranged with the first longitudinal beam 1 along the first direction X. The second longitudinal beam 2 includes a second body portion 21, a third connecting portion 22, and a fourth connecting portion 23. The third connecting portion 22 and the fourth connecting portion 23 are respectively located at both ends of the second body portion 21 along the second direction Y, and extend along the first direction X in a direction away from the second body portion 21. The third connecting portion 22 is opposite to the first connecting portion 12, and the fourth connecting portion 23 is opposite to the second connecting portion 13.

[0048] In some embodiments, the first longitudinal beam 1 and the second longitudinal beam 2 are low-pressure cast aluminum structural components. In some embodiments, the first longitudinal beam 1 and the second longitudinal beam 2 can be an integral structure. The interior of the first longitudinal beam 1 and the second longitudinal beam 2 can be a hollow structure. Therefore, the ports of the first connecting part 12 and the third connecting part 22 used to connect the first crossbeam 3 have an open structure, such as... Figure 10 As shown, this facilitates insertion at both ends of the first crossbeam 3. The ports of the second connecting part 13 and the fourth connecting part 23, used to connect the second crossbeam 4, have an open structure, as shown. Figure 10 As shown, this facilitates the insertion of the two ends of the second crossbeam 4.

[0049] The first crossbeam 3 is inserted into the first connecting part 12 and the third connecting part 22 at both ends along the first direction X, and is fixedly connected to the first connecting part 12 and the third connecting part 22 respectively. The first direction X is also the length direction of the first crossbeam 3. Therefore, the two ends along the length direction of the first crossbeam 3 can be inserted into the first connecting part 12 and the third connecting part 22. The second crossbeam 4 is arranged opposite to the first crossbeam 3 along the second direction Y, and the two ends along the first direction X of the second crossbeam 4 are inserted into the second connecting part 13 and the fourth connecting part 23 respectively, and are fixedly connected to the second connecting part 13 and the fourth connecting part 23 respectively. The interiors of the first crossbeam 3 and the second crossbeam 4 can be hollow structures. Thus, the first longitudinal beam 1, the second longitudinal beam 2, the first crossbeam 3 and the second crossbeam 4 form a closed installation space. It is understood that, along the first direction X, the rear subframe can be a three-section structure, namely, a first longitudinal beam 1 on the left, a first crossbeam 3 and a second crossbeam 4 in the middle, and a second longitudinal beam 2 on the right. The first longitudinal beam 1 and the second longitudinal beam 2 are symmetrical about left and right. It can also be understood that the rear subframe of this application is symmetrically arranged about the central axis along the second direction Y. In some embodiments, the first crossbeam 3 and the second crossbeam 4 can be extruded aluminum structural components.

[0050] In the technical solution of this application embodiment, by inserting the two ends of the first crossbeam 3 along the first direction X into the first connecting part 12 of the first longitudinal beam 1 and the third connecting part 22 of the second longitudinal beam 2, and by inserting the two ends of the second crossbeam 4 along the first direction X into the second connecting part 13 of the first longitudinal beam 1 and the fourth connecting part 23 of the second longitudinal beam 2, the lengths of the first crossbeam 3 and the second crossbeam 4 inserted into the first longitudinal beam 1 and the second longitudinal beam 2 can be adjusted based on motors of different sizes, thereby adjusting the exposed lengths of the first crossbeam 3 and the second crossbeam 4. This allows the installation space of the rear subframe composed of the first longitudinal beam 1, the second longitudinal beam 2, the first crossbeam 3, and the second crossbeam 4 to be suitable for vehicles of different sizes, improving the adaptability of the rear subframe and facilitating the development of multiple models on the same platform. Furthermore, since the first longitudinal beam 1, the second longitudinal beam 2, the first crossbeam 3, and the second crossbeam 4 are all hollow structures, the entire rear subframe can be made lightweight.

[0051] In some embodiments, in the first direction X, the maximum width of the first longitudinal beam 1 or the second longitudinal beam 2 is 30% to 40% of the total width of the rear subframe. Since the first longitudinal beam 1 and the second longitudinal beam 2 are symmetrical about the first direction X, the maximum widths of the first longitudinal beam 1 and the second longitudinal beam 2 are the same.

[0052] In some embodiments, the first crossbeam 3 is welded to the first connecting portion 12 and the third connecting portion 22 at both ends along the first direction X, respectively. Preferably, the connection is made by MIG welding. The second crossbeam 4 is welded to the second connecting portion 13 and the fourth connecting portion 23 at both ends along the first direction X, preferably by MIG welding, thereby improving the connection strength between the first crossbeam 3 and the second crossbeam 4 and the first longitudinal beam 1 and the second longitudinal beam 2.

[0053] Please refer to Figure 3 , Figure 4 and Figure 5 To improve welding quality, the first crossbeam 3 has stepped structures 31 at both ends along the first direction X. The stepped structure 31 is an annular step surrounding the ends of the first crossbeam 3. The first crossbeam 3 is inserted into the first connecting part 12 and the third connecting part 22 through the stepped structure 31 and is welded to the first connecting part 12 and the third connecting part 22. In some embodiments, the length of the stepped structure 31 along the first direction X can be greater than 0 mm and less than or equal to 50 mm.

[0054] In some embodiments, the second crossbeam 4 has stepped structures 31 at both ends along the first direction X. The stepped structures 31 are annular steps surrounding the ends of the second crossbeam 4. The second crossbeam 4 is inserted into the second connecting portion 13 and the fourth connecting portion 23 via the stepped structures 31, and is welded to the second connecting portion 13 and the fourth connecting portion 23 respectively. In some embodiments, such as... Figure 6As shown, along the first direction X, the length of the step structure 31 is C, where C can be greater than 0 mm and less than or equal to 50 mm. Furthermore, the width of the rear subframe can be adjusted by ±100 mm by adjusting the lengths of the first crossbeam 3 and the second crossbeam 4, and finally, the subframe is welded together at a suitable location. That is, as... Figure 4 As shown, the distance A between the welding points of the first crossbeam 3 and the first connecting part 12 and the third connecting part 22 is adjustable during installation, based on the width of different motors. Similarly, the distance between the welding points of the second crossbeam 4 and the second connecting part 13 and the fourth connecting part 23 is also adjustable. This improves the adaptability of the entire rear subframe.

[0055] like Figure 2 , Figure 3 or Figure 4 As shown, in the third direction Z, both the first connecting portion 12 and the third connecting portion 22 include a straight section 121 and an inclined section 122. Specifically, the straight section 121 is located at the bottom of the third direction Z, and the inclined section 122 is located at the top of the third direction Z. The inclined section 122 is inclined from the connection point with the first body portion 11 or the second body portion 21 toward the straight section 121. That is, the height of the first connecting portion 12 and the third connecting portion 22 in the third direction Z gradually decreases to form a first clearance space 101 above the first crossbeam 3. The first clearance space 101 is used to avoid high-voltage lines.

[0056] In some embodiments, please refer to Figure 5 and Figure 7 A reinforcing member 32 is provided inside the first crossbeam 3. The reinforcing member 32 extends from one end of the first crossbeam 3 to the other along the first direction X, meaning it extends along the length of the first crossbeam 3. The reinforcing member 32 is fixedly connected to the two side walls of the first crossbeam 3 in the second direction Y and the two side walls in the third direction Z, thereby increasing the strength and rigidity of the entire first crossbeam 3. Figure 7 As shown, in a cross-section perpendicular to the first direction X, the reinforcing member 32 has a rhomboid structure. The four corners of the rhomboid structure are fixedly connected to the four side walls of the first crossbeam 3, thereby improving the strength of the first crossbeam 3.

[0057] In some other embodiments, to improve the strength of the second crossbeam 4, a reinforcing member 32 may be provided inside the second crossbeam 4. The reinforcing member 32 extends from one end of the second crossbeam 4 to the other end along the first direction X, and is fixedly connected to the two side walls of the second crossbeam 4 in the second direction Y and the two side walls in the third direction Z, respectively. In a cross section perpendicular to the first direction X, the reinforcing member 32 may have a rhomboid structure. The four corners of the rhomboid structure are fixedly connected to the four side walls of the second crossbeam 4, thereby improving the strength of the second crossbeam 4.

[0058] In some embodiments, please refer to Figure 2 , Figure 3 and Figure 8 Along the second direction Y, the second crossbeam 4 has a first recess 41 on the side opposite to the first crossbeam 3. The first recess 41 is formed by the side wall of the second crossbeam 4 being recessed into its hollow structure. Along the first direction X, the length of the first recess 41 is the same as the length of the second crossbeam 4. The first recess 41 can be located near the bottom of the second crossbeam 4.

[0059] like Figure 2 As shown, the second connecting part 13 and the fourth connecting part 23 are provided with a third recess 26 corresponding to the first recess 41. This is so that the ports of the second connecting part 13 and the fourth connecting part 23 can match the longitudinal section of the second crossbeam 4, thereby facilitating the welding connection between the second connecting part 13 and the fourth connecting part 23 and the second crossbeam 4.

[0060] When the second crossbeam 4 is fixedly connected to the second connecting part 13 and the fourth connecting part 23, the first recess 41 and the third recess 26 correspond to each other and form a second clearance space 102. This second clearance space 102 can provide clearance for the rear wheel steering system 5. The second connecting part 13 and the fourth connecting part 23 are provided with mounting bosses 20 at the corners of the third recess 26. The mounting bosses 20 are provided with mounting holes that penetrate the mounting bosses 20 and communicate with the interior of the second crossbeam 4, so as to facilitate fixed connection with the rear wheel steering system 5 through the mounting holes of the mounting bosses 20. Figures 11 to 13 As shown, the mounting boss 20 protrudes from the surfaces of the second connecting portion 13 and the fourth connecting portion 23. By providing the mounting boss 20 on the second connecting portion 13 and the fourth connecting portion 23, when the rear wheel steering system 5 is fixed to the mounting boss 20, some components of the rear wheel steering system 5 can be accommodated within the second clearance space 102, avoiding interference with the installation of the rear wheel steering system 5 and thus affecting the installation efficiency and steering of the rear wheel steering system 5.

[0061] like Figure 12 As shown, along the second direction Y, the distance B between the surface of the mounting boss 20 and the side wall of the second crossbeam 4 away from the mounting boss 20 is variable due to the hollow internal structure of the second crossbeam 4 when the rear wheel steering system 5 is installed with the mounting boss 20. In some embodiments, the height of the surface of the mounting boss 20 protruding from the surfaces of the second connecting portion 13 and the fourth connecting portion 23 is greater than 0 mm and less than or equal to 20 mm. The mounting boss 20 has a height machining allowance of 0 to 20 mm to enable rapid adjustment of the mounting position of the rear wheel steering system 5 during chassis adjustment and adjustment of steering efficiency.

[0062] like Figure 2 , Figure 3 and Figure 8 As shown, along the third direction Z, the second crossbeam 4 has a second recess 42, which is located on the side opposite to the direction of the first clearance space 101. It can be understood that the second recess 42 is formed at the bottom of the second crossbeam 4, and is formed by the bottom wall of the second crossbeam 4 recessed into its hollow structure. The second recess 42 can form a clearance space at the bottom of the second crossbeam 4.

[0063] In some embodiments, such as Figure 1 and Figure 2 As shown, the first longitudinal beam 1 also includes a first extension 14 and a second extension 15. The first extension 14 and the second extension 15 are respectively disposed at both ends of the first body portion 11 along the second direction Y. The first extension 14 extends along the first direction X in a direction away from the first connecting portion 12. The second extension 15 extends in a direction away from the second connecting portion 13 and the first extension 14, and the second extension 15 is set at an angle with the first direction X and the second direction Y; it can be understood that the second extension 15 extends towards the left rear direction.

[0064] The second longitudinal beam 2 also includes a third extension 24 and a fourth extension 25. The third extension 24 and the fourth extension 25 are respectively provided at both ends of the second body part 21 along the second direction Y. The third extension 24 extends along the first direction X in a direction away from the third connecting part 22. The fourth extension 25 extends in a direction away from the fourth connecting part 23 and the third extension 24. The fourth extension 25 is set at an angle with the first direction X and the second direction Y. It can be understood that the fourth extension 25 extends towards the right rear direction.

[0065] A front bushing sleeve 16 is provided on the first extension 14 and the third extension 24. A rear bushing sleeve 17 is provided on the second extension 15 and the fourth extension 25. The central axis of the front bushing sleeve 16 and the rear bushing sleeve 17 is along the third direction Z, and both the front bushing sleeve 16 and the rear bushing sleeve 17 are used to connect to the vehicle body bushing. In some embodiments, such as Figure 2 As shown, the rear bushing sleeve 17 is provided with a positioning member 171 extending in the left rearward direction or the right rearward direction, and the positioning member 171 is provided with a mounting hole in the third direction Z. When assembling with the vehicle body, a fastener, such as a pin, is inserted into the mounting hole to adjust the position, so as to achieve precise positioning of the rear subframe when assembling with the vehicle body.

[0066] like Figure 3 and Figure 9As shown, both the first extension 14 and the third extension 24 are provided with a first control arm mounting bracket 10 at their bottom. The first control arm mounting bracket 10 is inclined downward, and a notch 100 is provided between the two opposing first control arm mounting brackets 10. The notch 100 is connected to the hollow structure interior of the first longitudinal beam 1 and the second longitudinal beam 2. It can be understood that the notch 100 penetrates the hollow structure interior of the first longitudinal beam 1 or the second longitudinal beam 2 between the two opposing first control arm mounting brackets 10 and the outside. By adjusting the size of the notch 100, the clamping stiffness of the two opposing first control arm mounting brackets 10 can be adjusted to maintain the structural strength of the overall structure. In some embodiments, the first control arm mounting bracket 10 faces the rear-down direction and is used to mount the lower control arm.

[0067] like Figure 2 As shown, the top of both the first extension 14 and the third extension 24 is provided with a second control arm mounting bracket 18, which is inclined upwards and used to mount the upper control arm. In some other embodiments, a notch 100 may be provided between the two opposing second control arm mounting brackets 18 to improve structural strength. A third control arm mounting bracket 19 is provided on both the first body portion 11 and the second body portion 21. The third control arm mounting bracket 19 is horizontally positioned and located near the rear of the second extension 15 and the fourth extension 25, and is used to mount the rear control arm. In some other embodiments, a notch 100 may be provided between the two opposing third control arm mounting brackets 19 to improve structural strength.

[0068] In the embodiments of this application, such as Figure 3 As shown, along the third direction Z, the bottoms of the first body part 11 and the second body part 21 are recessed into their hollow structures to form a third clearance space 103. The third clearance space 103 is located at the bottom of the first longitudinal beam 1 and the second longitudinal beam 2 to allow clearance for the mounting structure.

[0069] On the other hand, this application provides a vehicle including the rear subframe described in any of the foregoing claims.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rear subframe, characterized in that, include: The first longitudinal beam (1) includes a first body part (11), a first connecting part (12), and a second connecting part (13); The second longitudinal beam (2) is symmetrically arranged with the first longitudinal beam (1) along the first direction (X). The second longitudinal beam (2) includes a second body part (21), a third connecting part (22) and a fourth connecting part (23). The first crossbeam (3) is inserted into the first connecting part (12) and the third connecting part (22) at both ends along the first direction (X), and is fixedly connected to the first connecting part (12) and the third connecting part (22) respectively; The second crossbeam (4) is arranged opposite to the first crossbeam (3) along the second direction (Y). The two ends of the second crossbeam (4) along the first direction (X) are respectively inserted into the second connecting part (13) and the fourth connecting part (23) and are fixedly connected to the second connecting part (13) and the fourth connecting part (23) respectively. A reinforcing member (32) is provided inside the first crossbeam (3) and / or the second crossbeam (4). The first direction (X) and the second direction (Y) intersect.

2. The rear subframe according to claim 1, characterized in that, The first crossbeam (3) has stepped structures (31) at both ends along the first direction (X). The first crossbeam (3) is inserted into the first connecting part (12) and the third connecting part (22) through the stepped structures (31) and is connected to the first connecting part (12) and the third connecting part (22). In the third direction (Z), both the first connecting part (12) and the third connecting part (22) include a straight section (121) and an inclined section (122). The inclined section (122) is inclined from the connection point with the first body part (11) or the second body part (21) toward the straight section (121) to form a first clearance space (101) above the first crossbeam (3). The first direction (X), the second direction (Y) and the third direction (Z) intersect each other. And / or, The second crossbeam (4) has stepped structures (31) at both ends along the first direction (X). The second crossbeam (4) is inserted into the second connecting part (13) and the fourth connecting part (23) through the stepped structures (31) and is connected to the second connecting part (13) and the fourth connecting part (23) respectively.

3. The rear subframe according to claim 1, characterized in that, When the first crossbeam (3) is provided with the reinforcing member (32), the reinforcing member (32) extends from one end of the first crossbeam (3) to the other end along the first direction (X), and the reinforcing member (32) is fixedly connected to the two side walls of the first crossbeam (3) in the second direction (Y) and the two side walls in the third direction (Z); and / or, When the second crossbeam (4) is provided with the reinforcing member (32), the reinforcing member (32) extends from one end of the second crossbeam (4) to the other end along the first direction (X), and the reinforcing member (32) is fixedly connected to the two side walls of the second crossbeam (4) in the second direction (Y) and the two side walls in the third direction (Z).

4. The rear subframe according to claim 3, characterized in that, In a cross section perpendicular to the first direction (X), the reinforcing member (32) has a rhomboid structure.

5. The rear subframe according to claim 2, characterized in that, Along the second direction (Y), the second crossbeam (4) has a first recess (41) on the side away from the first crossbeam (3). The first recess (41) is formed by the side wall of the second crossbeam (4) being recessed towards the interior of its hollow structure. Along the first direction (X), the length of the first recess (41) is the same as the length of the second crossbeam (4). Along the third direction (Z), the second crossbeam (4) has a second recess (42) located on the side opposite to the direction of the first clearance space (101).

6. The rear subframe according to claim 5, characterized in that, The second connecting part (13) and the fourth connecting part (23) are provided with a third recess (26) corresponding to the first recess (41). When the second crossbeam (4) is fixedly connected to the second connecting part (13) and the fourth connecting part (23), the first recess (41) and the third recess (26) form a second clearance space (102). The second connecting part (13) and the fourth connecting part (23) are provided with a mounting boss (20) at the corner of the third recess (26). The mounting boss (20) protrudes from the surface of the second connecting part (13) and the fourth connecting part (23).

7. The rear subframe according to claim 1, characterized in that, The first longitudinal beam (1) further includes a first extension (14), which extends in the first direction (X) away from the first connecting part (12); The second longitudinal beam (2) also includes a third extension (24), which extends in the first direction (X) away from the third connecting part (22); the first extension (14) and the third extension (24) are provided with front bushing sleeves (16); A first control arm mounting bracket (10) is provided at the bottom of both the first extension (14) and the third extension (24), and a notch (100) is provided between the two oppositely arranged first control arm mounting brackets (10), the notch (100) being connected to the hollow structure interior of the first longitudinal beam (1) and the second longitudinal beam (2).

8. The rear subframe according to claim 7, characterized in that, The top of the first extension (14) and the third extension (24) are provided with a second control arm mounting bracket (18), which is inclined upward. The first body part (11) and the second body part (21) are provided with a third control arm mounting bracket (19), which is horizontally arranged along the third direction (Z). The bottom of the first body part (11) and the second body part (21) are recessed into the hollow structure to form a third clearance space (103).

9. The rear subframe according to claim 7, characterized in that, The first longitudinal beam (1) further includes a second extension (15). The first extension (14) and the second extension (15) are respectively disposed at both ends of the first body part (11) along the second direction (Y). The second extension (15) extends away from the second connecting part (13) and the first extension (14). The second extension (15) is set at an angle with the first direction (X) and the second direction (Y). The second longitudinal beam (2) further includes a fourth extension (25). The third extension (24) and the fourth extension (25) are respectively disposed at both ends of the second body part (21) along the second direction (Y). The fourth extension (25) extends away from the fourth connecting part (23) and the third extension (24). The fourth extension (25) is set at an angle with the first direction (X) and the second direction (Y). A rear bushing sleeve (17) is provided on the second extension (15) and the fourth extension (25).

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

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