Rear suspension structure and vehicle

Abstract

The utility model discloses a rear suspension structure and a vehicle, and the rear suspension structure comprises a frame which is of a frame type structure and is provided with an accommodating area; the driving bridge is arranged in the accommodating area and is connected with the frame through a suspension assembly; the steering knuckle assembly is connected with the frame; the transmission shaft assembly is arranged in the transverse direction of the frame and is in transmission connection with the driving electric bridge and the steering knuckle assembly; the shock absorber assembly is arranged on the outer side of a frame longitudinal beam of the frame and connected with the steering knuckle assembly and the frame. The driving electric bridge, the steering knuckle assembly and the shock absorber assembly are all integrated on the vehicle frame, an auxiliary vehicle frame does not need to be additionally arranged, and the overall longitudinal position of the rear suspension structure is lowered, so that the floor height is lowered, and the rear row longitudinal space of a passenger compartment is enlarged; and a seat-backrest linkage type automobile seat or a zero-gravity seat which needs to occupy a large space can be conveniently mounted.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a rear suspension structure and a vehicle. Background Art

[0002] The suspension structure is a general term for the force transmission connection device between the frame and the axle or wheel of the car. Its function is to transmit the force and torque acting between the wheel and the frame, and to buffer the impact force transmitted to the frame or body by the uneven road surface, and attenuate the vibration caused thereby, so as to ensure that the car can run smoothly. The rear suspension structure mainly includes components such as the rear wheel steering mechanism, the steering knuckle and the shock absorber. In the prior art, the rear suspension structure of the electric vehicle has a subframe, and components such as the steering knuckle and the shock absorber are installed on the subframe, and then connected to the main frame. The setting of the subframe makes the space of the passenger compartment smaller in the height direction, which affects the user experience of electric vehicle users who have high requirements for rear seat comfort. Utility Model Content

[0003] The utility model aims to at least solve the technical problem in the prior art that the rear suspension structure of an electric vehicle has a subframe, components such as a steering knuckle and a shock absorber are installed on the subframe and then connected to the main frame, and the arrangement of the subframe makes the passenger compartment space smaller.

[0004] To this end, one object of the utility model is to provide a rear suspension structure, the rear suspension structure comprising:

[0005] A vehicle frame, wherein the vehicle frame is a frame-type structure and has a containing area;

[0006] A driving axle, disposed in the accommodation area and connected to the vehicle frame through a suspension assembly;

[0007] A steering knuckle assembly connected to the vehicle frame;

[0008] A transmission shaft assembly is arranged in the transverse direction of the frame and is respectively connected to the drive axle and the steering knuckle assembly in a transmission manner;

[0009] The shock absorber assembly is arranged on the outer side of the frame longitudinal beam of the frame and is connected to the steering knuckle assembly and the frame respectively.

[0010] In some embodiments, the steering knuckle assembly includes a rear wheel steering machine and a steering knuckle, the rear wheel steering machine is arranged near the rear cross beam of the frame, the steering knuckle is arranged on the outside of the frame longitudinal beam, one end of the steering knuckle is connected to the frame longitudinal beam, and the rear wheel steering machine is connected to the other end of the steering knuckle through a steering tie rod.

[0011] In some embodiments, the shock absorber assembly includes a shock absorber, an air spring and a control arm, the control arm includes an upper control arm and a lower control arm, the upper control arm is arranged on the front side of the lower control arm, the air spring is installed on the shock absorber, the shock absorber is arranged between the upper control arm and the lower control arm, the inner end of the upper control arm and the inner end of the lower control arm are respectively connected to the frame longitudinal beam, the outer end of the upper control arm and the outer end of the lower control arm are respectively connected to the steering knuckle, the lower end of the shock absorber is connected to the lower control arm, and the upper end of the shock absorber is connected to the frame longitudinal beam.

[0012] In some embodiments, a shock absorber mounting seat is installed on the outer side of the frame longitudinal beam, and the upper end of the shock absorber is installed on the shock absorber mounting seat.

[0013] In some embodiments, the shock absorber and the air spring are an integrated structure.

[0014] In some embodiments, the shock absorber is disposed on a rear side of the transmission shaft assembly.

[0015] In some embodiments, the suspension assembly includes a suspension pad and a suspension bracket, the suspension pad is installed on the inner side of the frame crossbeam of the frame, the suspension bracket is installed on the side wall of the drive axle, and the suspension bracket is connected to the suspension pad and fixed by a first fastener.

[0016] In some embodiments, the suspension components are divided into three groups, and the three groups of suspension components are arranged in a triangle shape.

[0017] In some embodiments, the drive shaft assembly includes two drive shafts and an intermediate support member arranged between the two drive shafts, one end of the drive shaft is connected to the drive electric axle, the other end of the drive shaft is connected to the steering knuckle, and the intermediate support member is respectively connected to the drive shaft and the drive electric axle.

[0018] In some embodiments, one end of the transmission shaft is connected to the drive axle via a spline or a flat key, the steering knuckle includes a wheel hub bearing unit, and the other end of the transmission shaft penetrates into the wheel hub bearing unit and is fixed to the brake disc of the vehicle wheel hub via a second fastener.

[0019] Another object of the present utility model is to provide a vehicle, comprising the above-mentioned rear suspension structure.

[0020] The rear suspension structure and vehicle provided by the embodiment of the utility model have the following beneficial effects:

[0021] (1) The drive axle, steering knuckle assembly and shock absorber assembly are all integrated into the vehicle frame, eliminating the need for a separate subframe, thereby lowering the Z-direction position of the rear suspension structure, thereby lowering the floor height and expanding the rear longitudinal space of the passenger compartment, which is conducive to installing seat-back linkage car seats or zero-gravity seats that require a large space;

[0022] (2) The shock absorber is arranged at the rear side of the transmission shaft assembly, which reduces the space occupied by the shock absorber assembly along the vehicle's X direction. When the rear seats are folded down at a large angle, the area above the vehicle's wheel hub is free of obstacles, which is conducive to the arrangement of large-angle seats and improves the comfort of rear passengers in the passenger compartment;

[0023] (3) The shock absorber is arranged between the upper control arm and the lower control arm, and the shock absorber and the air spring are arranged in an integrated manner, which optimizes the layout position of the shock absorber, reduces the X-direction distance between the steering knuckle and the rear wheel steering gear, and is conducive to expanding the turning angle of the rear wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 is a first perspective view of a rear suspension structure according to an embodiment of the utility model;

[0026] Figure 2 is a schematic diagram of a suspension assembly according to an embodiment of the utility model;

[0027] Figure 3 is a second perspective perspective view of the rear suspension structure in an embodiment of the utility model;

[0028] Figure 4 It is a bottom view of the rear suspension structure according to the embodiment of the utility model.

[0029] Reference numerals:

[0030] 1. Vehicle frame; 11. Accommodation area; 12. Frame longitudinal beam; 13. Frame front cross beam; 14. Frame rear cross beam; 2. Drive axle; 21. Mounting hole; 3. Suspension assembly; 31. Suspension cushion; 311. Limiting part; 32. Suspension bracket; 4. Steering knuckle assembly; 41. Rear wheel steering gear; 411. Steering tie rod; 42. Steering knuckle; 421. Wheel hub bearing unit; 422. Second fastener; 5. Drive shaft assembly; 51. Drive shaft; 52. Intermediate support; 6. Shock absorber assembly; 61. Shock absorber; 62. Air spring; 63. Control arm; 631. Upper control arm; 632. Lower control arm; 64. Shock absorber mounting seat. DETAILED DESCRIPTION

[0031] Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

[0032] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of the embodiments. Other modifications within the scope and spirit of the present utility model will occur to those skilled in the art.

[0033] The accompanying drawings, which are included in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, are used to explain the principles of the present invention.

[0034] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0035] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present invention that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0036] The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0037] Specific embodiments of the present invention are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present invention, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present invention. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of ways with substantially any suitable detailed structure.

[0038] The vehicle Z direction defined in the embodiments of the present invention refers to the height direction of the vehicle, that is, the longitudinal direction of the vehicle; the vehicle X direction refers to the front and rear direction of the vehicle; and the vehicle Y direction refers to the left and right direction of the vehicle.

[0039] The first embodiment of the utility model provides a rear suspension structure, such as Figure 1 As shown, the rear suspension structure includes:

[0040] The frame 1 is a frame structure and has a receiving area 11;

[0041] The driving axle 2 is disposed in the accommodation area 11 and connected to the vehicle frame 1 through the suspension assembly 3;

[0042] A steering knuckle assembly 4 connected to the vehicle frame 1;

[0043] The transmission shaft assembly 5 is arranged along the lateral direction of the vehicle frame 1 and is respectively connected to the driving electric axle 2 and the steering knuckle assembly 4 in a transmission manner;

[0044] The shock absorber assembly 6 is arranged outside the frame longitudinal beam 12 of the frame 1 and is connected to the steering knuckle assembly 4 and the frame 1 respectively.

[0045] The vehicle frame 1 includes two frame longitudinal beams 12 arranged opposite to each other and a frame cross beam connected between the two frame longitudinal beams 12. The frame cross beams include a frame front cross beam 13 and a frame rear cross beam 14. The two frame longitudinal beams 12, the frame front cross beam 13 and the frame rear cross beam 14 form a receiving area 11. The drive axle 2 is a three-in-one axle, including a drive motor, a motor controller for controlling the drive motor and a reducer connected to the drive motor. The drive axle 2 is arranged in the receiving area 11, optimizing the spatial layout of the drive axle 2 and making the structure more compact. In addition, the shock absorber assembly 6, the steering knuckle assembly 4 and the drive axle 2 are integrated on the frame 1, and there is no need to set up a subframe 1 separately. The Z-axis position of the frame longitudinal beam 12 is lowered, thereby lowering the height of the floor and expanding the rear space of the passenger compartment. This is conducive to installing seat-back linkage seats or zero-gravity seats that require a large space in the rear row of the passenger compartment, thereby improving the comfort performance of the vehicle. At the same time, there is no need to set up a subframe 1 separately, which can achieve a reduction in parts.

[0046] like Figure 2As shown, the suspension assembly 3 includes a suspension pad 31 and a suspension bracket 32. The suspension pad 31 is installed on the inner side of the frame crossbeam of the frame 1, and the suspension bracket 32 ​​is installed on the side wall of the drive axle 2. The suspension bracket 32 ​​is connected to the suspension pad 31 and fixed by a first fastener. Specifically, the front crossbeam 13 and the rear crossbeam 14 of the frame are both provided with a mounting hole 21 for mounting the suspension pad 31. One end of the suspension pad 31 extends into the mounting hole 21, and the other end of the suspension pad 31 is connected to the drive axle 2 through the suspension bracket 32. The suspension pad 31 is preferably a rubber pad, which has good elastic deformation performance. One end of the suspension pad 31 is extended into the mounting hole 21, so that it can be better connected and matched with the mounting hole 21. One end of the suspension pad 31 close to the drive axle 2 has a limiting portion 311. After one end of the suspension pad 31 extends into the mounting hole 21, the other end of the suspension pad 31 is limited by the limiting portion 311 to ensure the connection stability between the suspension bracket 32 ​​and the drive axle 2.

[0047] Exemplarily, the first fastener is a bolt, and after the suspension bracket 32 ​​and the suspension pad 31 are connected, the first fastener fixes the drive axle 2 and the suspension pad 31 together, further improving the connection stability between the drive axle 2 and the suspension assembly 3.

[0048] There are three groups of suspension components 3, and the three groups of suspension components 3 are arranged in a triangular shape. Multiple groups of suspension components 3 are set to increase the installation points between the drive axle 2 and the front cross beam 13 and the rear cross beam 14 of the frame. The three groups of suspension components 3 are arranged in a triangular shape, and the stability of the triangle is used to improve the installation structure strength of the drive axle 2 and the suspension components 3.

[0049] like Figure 1 , Figure 3 and Figure 4 As shown, the steering knuckle assembly 4 includes a rear wheel steering machine 41 and a steering knuckle 42. The rear wheel steering machine 41 is arranged near the rear cross beam 14 of the frame 1, and the steering knuckle 42 is arranged on the outside of the frame longitudinal beam 12. One end of the steering knuckle 42 is connected to the frame longitudinal beam 12, and the rear wheel steering machine 41 is connected to the other end of the steering knuckle 42 through a steering tie rod 411. The steering knuckle 42 is arranged on the outside of the frame longitudinal beam 12, and the rear wheel steering machine 41 and the steering tie rod 411 are located below the rear cross beam 14 of the frame, so as to reduce the Z-direction height of the rear suspension structure and optimize the Z-direction space layout of the vehicle. Among them, the steering tie rod 411 is respectively arranged at both ends of the rear wheel steering machine 41, and is driven by the rear wheel steering machine 41 to move left and right to pull the left and right steering knuckles 42 to implement steering. The steering knuckle 42 is connected to the vehicle wheel hub (referred to as wheel), thereby realizing the steering of the vehicle wheel hub.

[0050] The shock absorber assembly 6 includes a shock absorber 61, an air spring 62 and a control arm 63. The control arm 63 includes an upper control arm 631 and a lower control arm 632. The upper control arm 631 is arranged on the front side of the lower control arm 632. The air spring 62 is installed on the shock absorber 61. The shock absorber 61 is arranged between the upper control arm 631 and the lower control arm 632. The inner end of the upper control arm 631 and the inner end of the lower control arm 632 are respectively connected to the frame longitudinal beam 12, the outer end of the upper control arm 631 and the outer end of the lower control arm 632 are respectively connected to the steering knuckle 42, the lower end of the shock absorber 61 is connected to the lower control arm 632, and the upper end of the shock absorber 61 is connected to the frame longitudinal beam 12. The shock absorber 61 and the air spring 62 play a role in buffering and shock absorption during the driving of the vehicle. In this embodiment, the inner ends of the upper control arm 631 and the lower control arm 632 are respectively connected to the frame longitudinal beam 12, the upper control arm 631 is connected to the top of the frame longitudinal beam 12, and the lower control arm 632 is connected to the bottom of the frame longitudinal beam 12. A space arranged along the Z direction is formed between the upper control arm 631 and the lower control arm 632. The shock absorber 61 is arranged in the space, so that the X-direction space occupied by the shock absorber 61, the upper control arm 631 and the lower control arm 632 is reduced, the space in the rear row of the passenger compartment is expanded, and the distance between the upper control arm 631 and the rear wheel steering machine 41 is reduced, and the angle of the rear wheel steering driven by the rear wheel steering machine 41 becomes larger.

[0051] Furthermore, the shock absorber 61 is arranged at the rear side of the transmission shaft assembly 5. If the shock absorber 61 is arranged at the front side of the transmission shaft assembly 5 or is in the same plane as the transmission shaft assembly 5 along the vehicle Y direction, the shock absorber 61 will play a blocking role along the vehicle X direction when the rear seats of the passenger compartment are arranged at a large angle, resulting in the rear seats of the passenger compartment reaching the limit position after a certain angle, and cannot be arranged at a large angle. Therefore, the shock absorber 61 is arranged at the rear side of the transmission shaft assembly 5, and the rear seats of the passenger compartment will not be hindered when they are tilted at a large angle, which is conducive to the arrangement of large-angle seats and improves the comfort of rear passengers.

[0052] In addition, the shock absorber 61 and the air spring 62 are an integrated structure. If the shock absorber 61 and the air spring 62 are relatively independently arranged along the X direction of the vehicle, a large space in the X direction will be occupied. The shock absorber 61 and the air spring 62 are arranged as an integrated structure, and the air spring 62 is sleeved on the outside of the shock absorber cylinder of the shock absorber 61, which reduces the space occupied by the air spring 62 along the X direction of the vehicle, further expands the space of the rear row of the passenger compartment, and is conducive to realizing the large-angle tilting setting of the rear seats of the passenger compartment.

[0053] At the same time, compared with the case where the shock absorber 61 and the air spring 62 are arranged as a separate structure, the case where the shock absorber 61 and the air spring 62 are arranged as an integrated structure further reduces the distance between the rear wheel steering machine 41 and the steering knuckle 42 .

[0054] In some embodiments, Figure 3As shown, a shock absorber mounting seat 64 is installed on the outer side of the frame longitudinal beam 12, and the upper end of the shock absorber 61 is installed on the shock absorber mounting seat 64. The shock absorber mounting seat 64 improves the support strength of the shock absorber 61 and improves the safety performance of the vehicle. Among them, the shock absorber mounting seat 64 is similar to the shock absorber 61 and is arranged on the rear side of the transmission shaft assembly 5.

[0055] like Figure 4 As shown, the transmission shaft assembly 5 includes two transmission shafts 51 and an intermediate support member 52 disposed between the two transmission shafts 51. One end of the transmission shaft 51 is connected to the drive axle 2, and the other end of the transmission shaft 51 is connected to the steering knuckle 42. The intermediate support member 52 is connected to the transmission shaft 51 and the drive axle 2 respectively. The transmission shaft assembly 5 realizes the transmission connection between the drive axle 2 and the steering knuckle 42. Since the transmission shaft assembly 5 is relatively long, it is configured as two transmission shafts 51 and an intermediate support member 52 disposed between the two transmission shafts 51 to improve the bending resistance of the transmission shaft assembly 5. Among them, the intermediate support member 52 is connected to the drive axle 2 to improve the structural stability between the intermediate support member 52 and the drive axle 2.

[0056] In some embodiments, one end of the transmission shaft 51 is connected to the drive axle 2 via a spline or a flat key, the steering knuckle 42 includes a wheel hub bearing unit 421, and the other end of the transmission shaft 51 penetrates the wheel hub bearing unit 421 and is fixed to the brake disc of the vehicle wheel hub via a second fastener 422. Specifically, the second fastener 422 is preferably a bolt, and the transmission shaft 51 and the drive axle 2 are connected via a spline or a flat key, so that the transmission shaft 51 and the drive axle 2 are stably connected. The transmission shaft 51 is also connected to the wheel hub bearing unit 421 of the steering knuckle 42, and then the connection between the transmission shaft 51 and the vehicle wheel hub is realized through a plurality of connecting bolts (for example, five) arranged on the brake disc of the vehicle wheel hub, thereby realizing the transmission connection between the drive axle 2, the transmission shaft assembly 5 and the vehicle wheel hub. When the drive axle 2 is started, it drives the transmission shaft 51 to rotate. The transmission shaft 51 is connected to the vehicle wheel hub through the wheel hub bearing unit 421, thereby driving the vehicle wheel hub to rotate. At the same time, the rotation of the transmission shaft 51 can transfer the vehicle load to the steering knuckle 42, and drive the vehicle wheel hub to steer through the steering knuckle 42.

[0057] A second embodiment of the utility model provides a vehicle, comprising the above-mentioned rear suspension structure.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0060] In the description of the present invention, "plurality" means two or more.

[0061] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0062] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0063] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rear suspension structure, characterized in that: include: A vehicle frame, wherein the vehicle frame is a frame-type structure and has a containing area; A driving axle, disposed in the accommodation area and connected to the vehicle frame through a suspension assembly; A steering knuckle assembly connected to the vehicle frame; A transmission shaft assembly is arranged in the transverse direction of the frame and is respectively connected to the drive axle and the steering knuckle assembly in a transmission manner; The shock absorber assembly is arranged on the outer side of the frame longitudinal beam of the frame and is connected to the steering knuckle assembly and the frame respectively.

2. A rear suspension structure according to claim 1, characterized in that: The steering knuckle assembly includes a rear wheel steering machine and a steering knuckle. The rear wheel steering machine is arranged close to the rear cross beam of the frame, the steering knuckle is arranged on the outside of the frame longitudinal beam, one end of the steering knuckle is connected to the frame longitudinal beam, and the rear wheel steering machine is connected to the other end of the steering knuckle through a steering tie rod.

3. A rear suspension structure according to claim 2, characterized in that: The shock absorber assembly includes a shock absorber, an air spring and a control arm, the control arm includes an upper control arm and a lower control arm, the upper control arm is arranged at the front side of the lower control arm, the air spring is installed on the shock absorber, the shock absorber is arranged between the upper control arm and the lower control arm, the inner end of the upper control arm and the inner end of the lower control arm are respectively connected to the frame longitudinal beam, the outer end of the upper control arm and the outer end of the lower control arm are respectively connected to the steering knuckle, the lower end of the shock absorber is connected to the lower control arm, and the upper end of the shock absorber is connected to the frame longitudinal beam.

4. A rear suspension structure according to claim 3, characterized in that: A shock absorber mounting seat is installed on the outer side of the frame longitudinal beam, and the upper end of the shock absorber is installed on the shock absorber mounting seat; and / or the shock absorber and the air spring are an integrated structure.

5. A rear suspension structure according to claim 3, characterized in that: The shock absorber is arranged on the rear side of the transmission shaft assembly.

6. A rear suspension structure according to claim 1, characterized in that: The suspension assembly includes a suspension pad and a suspension bracket, the suspension pad is installed on the inner side of the frame crossbeam of the frame, the suspension bracket is installed on the side wall of the drive axle, and the suspension bracket is connected to the suspension pad and fixed by a first fastener.

7. A rear suspension structure according to claim 6, characterized in that: The suspension components are divided into three groups, and the three groups of suspension components are arranged in a triangle shape.

8. A rear suspension structure according to claim 2, characterized in that: The transmission shaft assembly includes two transmission shafts and an intermediate support member arranged between the two transmission shafts, one end of the transmission shaft is connected to the drive axle, the other end of the transmission shaft is connected to the steering knuckle, and the intermediate support member is respectively connected to the transmission shaft and the drive axle.

9. A rear suspension structure according to claim 8, characterized in that: One end of the transmission shaft is connected to the driving axle via a spline or a flat key, the steering knuckle includes a wheel hub bearing unit, and the other end of the transmission shaft penetrates into the wheel hub bearing unit and is fixed to the brake disc of the vehicle wheel hub via a second fastener.

10. A vehicle, characterized in that: A rear suspension structure comprising any one of claims 1-9.

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