New energy vehicle

Abstract

According to the new energy vehicle provided by the utility model, the arrangement mode of the rear axle assembly and the driving motor of the new energy vehicle is improved, so that the floor of the vehicle can be lowered. In order to achieve the purpose, the new energy vehicle comprises a vehicle frame, a rear axle assembly and wheel hubs, a driving motor is fixedly arranged on the vehicle frame, and the driving motor is in transmission connection with the corresponding hub through a transmission shaft; the rear axle assembly comprises a rear axle body and a connecting frame, the connecting frame is connected with the hub through a bearing assembly, the rear axle body is fixedly arranged on the connecting frame, the connecting frame is provided with a mounting hole, and part of the transmission shaft is rotatably matched in the mounting hole. And the angle between the axial direction of the transmission shaft and the central axis of the mounting hole can be changed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and in particular to a new energy vehicle. Background Art

[0002] In the rapidly developing freight market, demand for rear-engine, rear-wheel drive, low-floor commercial vehicles has become increasingly prominent. Existing rear-wheel drive electric rear axle designs often employ an integrated rear axle structure, where the drive motor and rear axle move up and down as a single unit. This directly limits the vehicle's floor height. Furthermore, the integration of the drive motor and rear axle leads to significant deficiencies in unsprung mass control and achieving a low floor, weakening the product's market competitiveness. Utility Model Content

[0003] The purpose of the utility model is to provide a new energy vehicle, which is conducive to lowering the vehicle floor by improving the rear axle composition and the layout of the drive motor of the new energy vehicle.

[0004] To achieve the above-mentioned objectives, the present utility model provides a new energy vehicle, including a frame, a rear axle assembly and a wheel hub, the frame is fixedly provided with a drive motor, and the drive motor is connected to the corresponding wheel hub through a transmission shaft; the rear axle assembly includes a rear axle bridge body and a connecting frame, the connecting frame is connected to the wheel hub through a bearing assembly, the rear axle bridge body is fixed to the connecting frame, the connecting frame is provided with a mounting hole, part of the drive shaft can be rotatably fitted in the mounting hole, and the angle between the axial direction of the drive shaft and the central axis of the mounting hole can be changed; the height of the position where the rear axle bridge body is connected to the connecting frame is lower than the height of the mounting hole from the ground.

[0005] By adopting the above technical solution, the drive motor is decoupled from the rear axle assembly and fixedly connected to the frame, and the transmission shaft is rotatably matched with the mounting hole and can swing relative to the central axis of the mounting hole, thereby preventing the drive motor from jumping up and down with the rear axle assembly during vehicle driving. At the same time, a connecting frame is provided to realize the connection between the rear axle bridge body and the wheel hub. At the same time, the highest point of the rear axle bridge body is lower than the height of the mounting hole from the ground, so that the space for the rear axle assembly to jump in the height direction is significantly reduced, which is conducive to the realization of a low floor car.

[0006] Optionally, the bearing assembly includes a bearing seat and a bearing body, and the connecting frame is directly or indirectly fixed to the bearing seat; the wheel hub is provided with a drive shaft adapted to the bearing body, and the drive shaft includes a fixed end fixedly connected to the wheel hub and a connecting end transmission-connected to the transmission shaft, the connecting end extends into the mounting hole, and is transmission-connected to the transmission shaft through a universal joint.

[0007] In this way, the wheel hub can rotate relative to the connecting frame, and the connection between the connecting frame and the wheel hub is achieved. At the same time, the drive motor body is fixed to the frame by connecting the drive shaft and the transmission shaft through the universal joint. When the rear axle assembly jumps in the height direction, a variable deflection angle is formed between the central axis of the transmission shaft and the central axis of the mounting hole.

[0008] Optionally, the new energy vehicle further comprises a leaf spring assembly, wherein the leaf spring assembly is fixed to the connecting frame on the corresponding side. In this way, the connecting frame also serves to support the leaf spring assembly.

[0009] Optionally, the connecting frame includes a first connecting wall and a second connecting wall arranged at an angle, the first connecting wall being fixedly connected to the wheel hub, and the second connecting wall being fixedly connected to the rear axle body; and further includes a leaf spring assembly, which is fixedly connected to the upper surface of the second connecting wall; or, the leaf spring assembly is fixedly connected to the lower surface of the second connecting wall.

[0010] In this embodiment, the leaf spring assembly is fixed to different surfaces of the second connecting wall, thereby achieving connection between the connecting piece and the leaf spring assembly.

[0011] Optionally, the first connecting wall is fixedly connected to a third connecting wall, and the third connecting wall is located on the upper side of the second connecting wall in the height direction of the vehicle. The third connecting wall is provided with a limiting protrusion, and the limiting protrusion protrudes upward from the surface of the third connecting wall away from the second connecting wall.

[0012] By fixing a third connecting wall on the top end of the first connecting arm to support the limiting protrusion, the highest jumping position of the rear axle assembly is limited in the height direction.

[0013] Optionally, in the width direction of the vehicle, a first flange is formed at one end of the second connecting wall away from the first connecting wall, and the first flange extends vertically; the surface of the first flange away from the first connecting wall is fixedly connected to the rear axle body.

[0014] The second connecting arm can extend in a horizontal direction toward the direction close to the rear axle body, and a reliable connection with the rear axle body is achieved by providing a first flange.

[0015] Optionally, the new energy vehicle also includes two end walls extending along the height direction of the vehicle, and the two end walls are arranged relatively to each other along the length direction of the vehicle. The top ends of the end walls are fixedly connected to the third connecting wall, and the bottom ends are fixedly connected to the second connecting wall, and the transmission shaft is passed between the two end walls.

[0016] Optionally, the two end walls are defined as a front end wall and a rear end wall, and the rear end wall is located behind the front end wall in the length direction;

[0017] The second connecting wall extends rearwardly in the length direction to the rear side of the rear end wall, and the first flange is located at a portion of the second connecting wall located at the rear side of the rear end wall.

[0018] In this way, the connecting frame is formed into a closed structure with one end open, thereby improving the overall structural strength of the connecting frame.

[0019] Optionally, the rear axle body has a straight section and a bent section, the bent section is connected to both ends of the straight section, and the bent section bends back from the straight section toward the side close to the motor; in the length direction, the rear end wall has a rear wall surface, and the rear wall surface is located on the side away from the transmission shaft; the bent section is fixedly connected to the rear wall surface.

[0020] By connecting the bent section of the rear axle body to the rear wall surface of the rear end wall, the space required for the rear axle body to jump up and down in the height direction is further reduced, which is conducive to further lowering the vehicle floor.

[0021] Optionally, the end wall has a first side wall and a second side wall fixedly connected to the first connecting wall in the width direction of the vehicle; parts of the first side walls of the two connecting frames located on the same surface in the width direction are recessed in a direction away from each other.

[0022] By partially concavely facing outwards, the bearing capacity of the connecting frame is further improved.

[0023] Optionally, the dimension of one end of each end wall fixed to the corresponding third connecting wall in the vehicle width direction is smaller than the dimension of one end of the end wall fixed to the corresponding second connecting wall in the vehicle width direction, thereby increasing the load-bearing capacity of the connecting frame in the height direction.

[0024] Optionally, the connecting frame further comprises two reinforcing walls arranged along the length direction of the vehicle, the reinforcing walls being supported on the third connecting wall and the first connecting wall, thereby further increasing the connection strength between the third connecting wall and the first connecting wall.

[0025] Optionally, two second flanges are provided on the front and rear sides of the first connecting wall, and the two second flanges are pressed against the outer sides of the reinforcing wall on the corresponding sides. By providing the second flanges and the outer sides of the reinforcing wall in a fixed connection, the load-bearing capacity of the connecting frame is further improved.

[0026] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0028] Figure 1 This is a schematic structural diagram of a new energy vehicle in an embodiment of the present utility model, one of which;

[0029] Figure 2 yes Figure 1 Rear view;

[0030] Figure 3 yes Figure 1 A partial enlarged schematic diagram;

[0031] Figure 4 yes Figure 3 lateral cross-section of

[0032] Figure 5 This is a schematic structural diagram of a new energy vehicle in an embodiment of the present utility model, Part 2;

[0033] Figure 6 This is a schematic structural diagram of a new energy vehicle in an embodiment of the present invention, number three.

[0034] Reference numerals:

[0035] 1-frame; 11-body beam; 12-adapter frame;

[0036] 2-rear axle bridge body; 21-straight section; 22-bend section;

[0037] 3-connecting frame; 31-first connecting wall; 31a-second flange; 31b-connecting structure; 31b1-mounting hole; 32-second connecting wall; 32a-first flange; 33-third connecting wall; 34-limiting protrusion; 35-front end wall; 36-rear end wall; 36a-rear wall surface; 36b-first side wall; 37-reinforcement wall;

[0038] 4-wheel hub; 41-drive shaft; 41a-fixed end; 41b-connecting end;

[0039] 5-drive motor; 51-drive shaft;

[0040] 6-leaf spring assembly; 61-leaf spring mounting piece;

[0041] 71-bearing seat; 71a-mounting tube; 72-bearing body. DETAILED DESCRIPTION

[0042] The utility model provides a new energy vehicle, which is beneficial to lowering the vehicle floor by improving the rear axle composition and the layout of the drive motor of the new energy vehicle.

[0043] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0044] Relational terms such as “first” and “second” are used merely to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0045] In the existing technology, the rear axle is formed by integrating the drive motor with the rear axle body, which means that sufficient space must be reserved above the rear axle body to accommodate its upward jump during movement, thereby directly limiting the reduction of the vehicle floor height, making it impossible to achieve an ideal low-floor design, and affecting the loading and unloading efficiency and space utilization of goods.

[0046] Furthermore, mounting the drive motor directly on the rear axle body results in excessive unsprung mass. Excessive unsprung mass not only reduces ride comfort and increases vibration transmission from road irregularities, but also affects vehicle handling response and stability, hindering the overall driving experience.

[0047] Furthermore, the drive motor's mounting position on the rear axle is often difficult to precisely control, which can easily lead to eccentricity. This eccentric arrangement can cause frequency deviation and resonance in the rear axle, particularly within a specific frequency range (e.g., 15-22 Hz). These resonances are difficult to effectively address with traditional methods and can cause serious failures such as unusual noise, cracking, or even breakage of the rear axle, posing a serious threat to driving safety.

[0048] Please refer to Figures 1-6 , Figure 1 This is a schematic structural diagram of a new energy vehicle in an embodiment of the present utility model, one of which; Figure 2 yes Figure 1 Rear view; Figure 3 yes Figure 1 A partial enlarged schematic diagram; Figure 4 yes Figure 3 lateral cross-section of Figure 5 This is a schematic structural diagram of a new energy vehicle in an embodiment of the present utility model, Part 2; Figure 6 This is a schematic structural diagram of a new energy vehicle in an embodiment of the present invention, number three.

[0049] As shown in the figure, the present invention provides a new energy vehicle comprising a frame 1, a rear axle assembly, and wheel hubs 4. A drive motor 5 is fixedly mounted on the frame 1 and connected to the corresponding wheel hub 4 via a drive shaft 51. A connecting frame 3 is provided with a mounting hole 31b1, within which a portion of the drive shaft 51 rotatably fits, and the angle between the axial direction of the drive shaft 51 and the central axis s2 of the mounting hole 31b1 is variable. The rear axle assembly comprises a rear axle body 2 and a connecting frame 3. The connecting frame 3 is connected to the wheel hub 4 via a bearing assembly, and the rear axle body 2 is fixed to the connecting frame 3.

[0050] In one specific embodiment, the vehicle frame 1 includes body beams 11 arranged opposite each other in the vehicle width direction, extending along the length of the vehicle. The drive motor 5 is fixedly connected to the body beams 11 via adapter brackets 12. The adapter brackets 12 extend along the width of the vehicle, with their ends fixedly connected to the body beams 11 on the corresponding sides. A cross member of the vehicle frame 1 can serve as the adapter brackets 12 to securely mount the drive motor 5, thereby reducing the number of vehicle components.

[0051] The connecting frame 3 defines a mounting hole 31b1, the central axis s2 of which extends along the width of the vehicle. One end of the drive shaft 51 extends into the mounting hole 31b1 and is in transmission connection with the wheel hub 4 to output torque to the wheel hub 4. The bearing assembly includes a bearing seat 71 and a bearing body 72. The connecting frame 3 is directly or indirectly fixed to the bearing seat 71, for example, by threading or riveting the connecting frame 3 and the bearing seat 71. The wheel hub 4 is provided with a drive shaft 41 that is compatible with the bearing body 72. The drive shaft 41 includes a fixed end 41a fixedly connected to the wheel hub 4 and a connecting end 41b in transmission connection with the drive shaft 51. The connecting end 41b extends into the mounting hole 31b1 and is in transmission connection with the drive shaft 51 via a universal joint.

[0052] In a more specific embodiment, the outer ring of the bearing body 72 is fixedly connected to the connecting frame 3 via a bearing seat 71. The bearing seat 71 is provided with a mounting tube 71a. The portion of the connecting frame 3 where the mounting hole 31b1 is located is inserted into or sleeved onto the mounting tube 71a, axially abutting against the bearing seat 71 and threadedly connected. The drive shaft 41 passes through the inner ring of the bearing body 72 and the bearing seat 71 and into the mounting hole 31b1, thereby forming a mating connection with the transmission shaft 51.

[0053] In this way, the wheel hub 4 can rotate relative to the connecting frame 3, and the connection between the connecting frame 3 and the wheel hub 4 is also achieved. At the same time, the drive shaft 41 and the transmission shaft 51 are connected by a universal joint to achieve the fixing of the drive motor 5 body to the frame 1. When the rear axle assembly jumps in the height direction, a variable yaw angle is formed between the central axis s1 of the transmission shaft 51 and the central axis s2 of the mounting hole 31b1.

[0054] In the above embodiment, the height above the ground where the rear axle body 2 connects to the connecting bracket 3 is lower than the height above the ground of the mounting hole 31b1. Specifically, the center of the point where the rear axle body 2 connects to the connecting bracket 3 is lower than the height above the ground of the center axis s2 of the mounting hole 31b1. This ensures that the height above the rear axle body 2 does not exceed the highest point of the drive motor 5.

[0055] By adopting the above-mentioned technical solution, the drive motor 5 is decoupled from the rear axle assembly and fixedly connected to the frame 1. The transmission shaft 51 rotates and cooperates with the mounting hole 31b1, and can swing relative to the central axis s2 of the mounting hole 31b1, so as to prevent the drive motor 5 from jumping up and down with the rear axle assembly during the driving of the vehicle. At the same time, a connecting frame 3 is provided to realize the connection between the rear axle bridge body 2 and the wheel hub 4. At the same time, the highest point of the rear axle bridge body 2 is lower than the height of the mounting hole 31b1 from the ground, so that the space for the rear axle assembly to jump in the height direction is significantly reduced, which is conducive to the realization of a low floor car.

[0056] In some other optional embodiments, the new energy vehicle further comprises a leaf spring assembly 6 , which is fixed to the connecting frame 3 on the corresponding side. In this way, the connecting frame 3 also serves to support the leaf spring assembly 6 .

[0057] Specifically, the connecting frame 3 includes a first connecting wall 31 and a second connecting wall 32 arranged at an angle. The first connecting wall 31 is used to be fixedly connected to the wheel hub 4. The first connecting wall 31 extends roughly along the height direction. The second connecting wall 32 is perpendicularly arranged on the inner side of the first connecting wall 31, or is arranged at an angle to the first connecting wall 31; the inner side of the first connecting wall 31 refers to the side of the first connecting wall 31 close to the center of the vehicle in the width direction.

[0058] A connecting structure 31b is provided on the side of the first connecting wall 31 proximal to the wheel hub 4. This tubular member defines the aforementioned mounting hole 31b1, which extends axially through the first connecting wall 31 to form an opening for the transmission shaft 51 to pass through. The connecting structure 31b can be integrally formed with the first connecting wall 31 or separately machined and subsequently welded. The connecting structure 31b is inserted into or sleeved around the mounting tube 71a, which radially limits the connecting structure 31b.

[0059] The second connecting wall 32 is also used to mount a leaf spring assembly 6, which is fixedly connected to the upper surface of the second connecting wall 32. Alternatively, the leaf spring assembly 6 is fixedly connected to the lower surface of the second connecting wall 32. The leaf spring assembly 6 is threadedly connected to the lower surface of the second connecting wall 32 via a leaf spring mounting member 61.

[0060] In this embodiment, the leaf spring assembly 6 is fixed to different surfaces of the second connecting wall 32 , thereby achieving connection between the connecting piece and the leaf spring assembly 6 .

[0061] In other optional embodiments, the first connecting wall 31 is fixedly connected to a third connecting wall 33. The third connecting wall 33 is arranged perpendicular to the inner side of the first connecting wall 31 and is arranged opposite the second connecting wall 32 in the vehicle height direction. The third connecting wall 33 is located above the second connecting wall 32. The term "above" here means that the third connecting wall 33 is higher above the ground than the second connecting wall 32. The third connecting wall 33 is provided with a stopper 34, which protrudes upward from the surface of the third connecting wall 33 away from the second connecting wall 32. The stopper 34 is used to form a height stop with the lower surface of the vehicle body beam 11.

[0062] By fixing the third connecting wall 33 on the top end of the first connecting arm to support the limiting protrusion 34, the highest jumping position of the rear axle assembly is limited in the height direction.

[0063] The new energy vehicle of the present application is described below with reference to several specific embodiments. The same parts in different embodiments are only embodied in one embodiment and are not repeated in the other embodiments.

[0064] Example 1

[0065] like Figure 1-Figure 4 As shown, in this embodiment, a first flange 32a is formed at the end of the second connecting wall 32 facing away from the first connecting wall 31 in the vehicle width direction. The first flange 32a extends vertically and parallel to the first connecting wall 31. The surface of the first flange 32a facing away from the first connecting wall 31 is fixedly connected to the rear axle body 2. In other words, the rear axle body 2 is fixedly connected to the inner side wall of the first flange 32a. The definition of "inner" should be understood as described above. The rear axle body 2 is a linear structure that extends along the width direction of the vehicle.

[0066] The second connecting arm can extend horizontally toward the side away from the drive motor 5 to be fixedly connected to the rear axle bridge body 2, that is, extend backward along the length direction of the vehicle to stagger the drive motor 5 and the rear axle bridge body 2 on the horizontal plane, thereby avoiding the rear axle bridge body 2 from colliding with the drive motor 5 during the jumping process.

[0067] In this embodiment, the new energy vehicle also includes two end walls extending along the height direction of the vehicle. The two end walls are arranged relatively to each other along the length direction of the vehicle. The two end walls are defined as the front end wall 35 and the rear end wall 36. In the length direction, the rear end wall 36 is located on the rear side of the front end wall 35.

[0068] The top ends of the end walls are fixedly connected to the third connecting wall 33, and the bottom ends are fixedly connected to the second connecting wall 32. The drive shaft 51 is disposed between the two end walls. The second connecting wall 32 extends rearward in the longitudinal direction to the rear side of the rear end wall 36. The first flange 32a is located in the portion of the second connecting wall 32 located behind the rear end wall 36. This allows the rear axle body 2 to be arranged horizontally across from the drive motor 5.

[0069] In this embodiment, the leaf spring assembly 6 is fixedly connected to the second connecting wall 32 in the width direction of the vehicle and is located between the first flange 32a and the bearing seat 71. Figure 1 、 Figure 3 The method shown is fixed to the lower surface of the second connecting wall 32.

[0070] Example 2

[0071] like Figure 5 As shown, the parts identical to those in Example 1 are not repeated here. The difference between Example 2 and Example 1 lies in the different connection locations between the rear axle body 2 and the connecting frame 3. In this embodiment, the rear axle body 2 has a straight section 21 and a bent section 22. The bent section 22 connects to both ends of the straight section 21 and bends back from the straight section 21 toward the side closer to the motor. In the longitudinal direction, the rear end wall 36 has a rear wall surface 36a, which is located away from the drive shaft 51. The bent section 22 is fixedly connected to the rear wall surface 36a. "Rear" refers to the vehicle's normal use, with the front side facing the vehicle's front end being the front, and the reverse being the rear.

[0072] By connecting the bent section 22 of the rear axle body 2 to the rear wall surface 36a of the rear end wall 36, the space required for the rear axle body 2 to jump up and down in the height direction is further reduced, which is conducive to further lowering the vehicle floor.

[0073] In the two aforementioned embodiments, the end wall includes a first side wall 36b in the width direction of the vehicle and a second side wall fixedly connected to the first connecting wall 31. Portions of the first side walls 36b of the two connecting frames 3 located on the same surface in the width direction are recessed in a direction away from each other.

[0074] Optionally, the dimension of the end of each end wall fixed to the corresponding third connecting wall 33 in the vehicle width direction is smaller than the dimension of the end of the end wall fixed to the corresponding second connecting wall 32 in the vehicle width direction. In this way, the load-bearing capacity of the connecting frame 3 in the height direction can be increased.

[0075] Example 3

[0076] like Figure 6As shown, in this embodiment, further embodiments are provided to support the structure of the connecting frame 3. In this embodiment, the connecting frame 3 includes a vertically extending first connecting wall 31. The manner in which the first connecting wall 31 is connected to the wheel hub 4 is similar to that described above. The connecting frame 3 also includes a second connecting wall 32 and a third connecting wall 33. In this embodiment, the second connecting wall 32 is provided with a first flange 32a for fixed connection to the end of the rear axle body 2.

[0077] However, the structures of the first and third connecting walls 31, 33 differ from those of the two previous embodiments. Specifically, the connecting frame 3 further includes two reinforcing walls 37 arranged along the length of the vehicle. The reinforcing walls 37 are triangular plate-shaped structures, with one side of the triangle fixedly attached to the lower surface of the third connecting wall 33, and another side fixedly attached to the inner wall of the first connecting wall 31. The third side is supported between the first and third connecting walls 31, meaning that the reinforcing walls 37 are supported between the third and first connecting walls 33, 31. This further increases the connection strength between the third and first connecting walls 33, 31.

[0078] Optionally, two second flanges 31a are further provided on the front and rear sides of the first connecting wall 31. The two second flanges 31a extend inward from the inner sidewall of the connecting wall, but the distance they extend inward does not exceed the reinforcing wall 37. The two second flanges 31a abut against the outer sides of the reinforcing wall 37 on the corresponding sides. By providing a fixed connection between the second flanges 31a and the outer sides of the reinforcing wall 37, the load-bearing capacity of the connecting frame 3 is further improved.

[0079] Another difference between this embodiment and the first and second embodiments is that the leaf spring assembly 6 in this application is fixedly connected to the upper surface of the second connecting wall 32. This achieves a fixed connection between the leaf spring assembly 6 and the connecting member.

[0080] In each of the above-mentioned embodiments, the extension surface of the vehicle body beam 11 in the vehicle length direction should cover a portion of the connecting frame 3 in the vehicle height direction to ensure that each key stress point is reasonably distributed.

[0081] Compared with the existing technology, the technical solution of this application has the following advantages:

[0082] 1. It can effectively solve the problem of vehicle floor being too high from the ground.

[0083] 2. Compared with the traditional rear axle structure, the drive motor 5 is separated and installed independently, which can better solve the problem of large unsprung mass of the traditional rear axle and improve ride comfort and operational stability.

[0084] 3. It can effectively solve the problem of abnormal noise and cracking of the rear axle caused by the large amplitude of the traditional rear axle assembly due to the deviation of the drive motor 5 from the center of the rear axle.

[0085] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help you understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A new energy vehicle, characterized in that: The invention comprises a vehicle frame (1), a rear axle assembly and a wheel hub (4); the vehicle frame (1) is fixedly provided with a drive motor (5); the drive motor (5) and the corresponding wheel hub (4) are connected to each other via a transmission shaft (51); the rear axle assembly comprises a rear axle body (2) and a connecting frame (3); the connecting frame (3) is connected to the wheel hub (4) via a bearing assembly; the rear axle body (2) is fixed to the connecting frame (3); the connecting frame (3) is provided with a mounting hole (31b1); a portion of the drive shaft (51) is rotatably engaged in the mounting hole (31b1), and the central axis (s1) of the drive shaft (51) can deflect relative to the central axis (s2) of the mounting hole (31b1).

2. The new energy vehicle according to claim 1, characterized in that: It also includes a leaf spring assembly (6), wherein the leaf spring assembly (6) is fixed to the connecting frame (3) on the corresponding side.

3. The new energy vehicle according to claim 2, characterized in that: The connecting frame (3) comprises a first connecting wall (31) and a second connecting wall (32) arranged at an angle, wherein the first connecting wall (31) is used for fixedly connecting to the wheel hub (4); It also includes a leaf spring assembly (6), wherein the leaf spring assembly (6) is fixedly connected to the upper surface of the second connecting wall (32); or, the leaf spring assembly (6) is fixedly connected to the lower surface of the second connecting wall (32).

4. The new energy vehicle according to claim 3, characterized in that: The first connecting wall (31) is fixedly connected to a third connecting wall (33), and the third connecting wall (33) is located on the upper side of the second connecting wall (32) in the height direction of the vehicle. The third connecting wall (33) is provided with a limiting protrusion (34), and the limiting protrusion (34) protrudes upward from the surface of the third connecting wall (33) away from the second connecting wall (32).

5. The new energy vehicle according to claim 4, characterized in that: In the width direction of the vehicle, a first flange (32a) is formed at one end of the second connecting wall (32) away from the first connecting wall (31), and the first flange (32a) extends vertically; a surface of the first flange (32a) away from the first connecting wall (31) is fixedly connected to the rear axle body (2).

6. The new energy vehicle according to claim 5, characterized in that: It also includes two end walls extending in the height direction of the vehicle, the two end walls are arranged opposite to each other in the length direction of the vehicle, the top ends of the end walls are fixedly connected to the third connecting wall (33), and the bottom ends are fixedly connected to the second connecting wall (32), and the transmission shaft (51) is passed through the two end walls.

7. The new energy vehicle according to claim 6, characterized in that: The two end walls are defined as a front end wall (35) and a rear end wall (36), and the rear end wall (36) is located at the rear side of the front end wall (35) in the length direction; The second connecting wall (32) extends rearward to the rear side of the rear end wall (36), and the first flange (32a) is located at a portion of the second connecting wall (32) located at the rear side of the rear end wall (36).

8. The new energy vehicle according to claim 7, characterized in that: The rear axle bridge body (2) has a straight section (21) and a bent section (22), the bent section (22) being arranged at both ends of the straight section (21), and the bent section (22) is bent back from the straight section (21) toward a side close to the drive motor (5); In the length direction, the rear end wall (36) has a rear wall surface (36a), and the rear wall surface (36a) is located on a side away from the transmission shaft (51); the bending section (22) is fixedly connected to the rear wall surface (36a).

9. The new energy vehicle according to claim 6, characterized in that: The end wall has a first side wall (36b) and a second side wall fixedly connected to the first connecting wall (31) in the width direction of the vehicle; Portions of the first side walls (36b) of the two connecting frames (3) located on the same surface in the width direction are recessed in a direction away from each other.

10. The new energy vehicle according to claim 9, characterized in that: The dimension of one end of each end wall fixed to the corresponding third connecting wall (33) in the vehicle width direction is smaller than the dimension of one end of the end wall fixed to the corresponding second connecting wall (32) in the vehicle width direction.

11. The new energy vehicle according to claim 5, characterized in that: The connecting frame (3) further comprises two reinforcing walls (37) arranged along the length direction of the vehicle, wherein the reinforcing walls (37) are supported between the third connecting wall (33) and the first connecting wall (31).

12. The new energy vehicle according to claim 11, characterized in that: Two second flanges (31a) are also provided on the front and rear sides of the first connecting wall (31), and the two second flanges (31a) are pressed against the outer sides of the reinforcing walls (37) on the corresponding sides.

13. The new energy vehicle according to any one of claims 1 to 12, characterized in that: The bearing assembly comprises a bearing seat (71) and a bearing body (72), and the connecting frame (3) is directly or indirectly fixed to the bearing seat (71); The wheel hub (4) is provided with a drive shaft (41) adapted to the bearing body (72), the drive shaft (41) comprising a fixed end (41a) fixedly connected to the wheel hub (4) and a connecting end (41b) transmission-connected to the transmission shaft (51), the connecting end (41b) extending into the mounting hole (31b1) and being transmission-connected to the transmission shaft (51) via a universal joint.

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