Chassis and vehicle

Abstract

The utility model discloses a chassis and a vehicle. The chassis comprises a longitudinal beam; a battery assembly; and the rear axle assembly comprises a rear axle piece, a transmission shaft piece and plate spring pieces, the rear axle piece extends in the left-right direction and is arranged on the front side of the battery assembly at intervals, and the left end and the right end of the rear axle piece are connected with the two plate spring pieces correspondingly. Therefore, on the premise that the suspension spring of the vehicle uses the plate spring piece, the rear axle piece is arranged on the front side of the battery assembly at intervals and connected with the plate spring piece, on the premise that the vibration reduction performance of the vehicle is improved, the situation that the rear axle piece is influenced by arrangement interference of the battery assembly can be prevented, and the rear axle piece does not occupy the installation space of the battery assembly; therefore, the size of the battery assembly can be increased, the battery assembly can be conveniently installed and arranged, the structural layout of the chassis can be optimized, and the overall structure of the chassis is more compact. In addition, the rear axle piece can provide certain protection for the battery assembly, and can buffer and absorb external force borne by the chassis from front to back.

Description

Technical Field

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

[0002] With the development of technology and the improvement of users' living standards, vehicles have become an essential means of transportation for people. The main function of the front suspension system of a vehicle chassis is to transmit the force and torque between the wheels and the frame, and to mitigate the impact force and vibration transmitted from the road surface to the frame or the body.

[0003] In the related art, after using leaf springs in the suspension system of a vehicle chassis, the rear axle connected to the leaf springs is too close to the battery assembly on the chassis in the front-rear direction. During the transmission of the rear axle components, it is easy to interfere with the setting of the battery assembly on the chassis, and due to the setting of the rear axle components, the volume of the battery assembly cannot be set to be large. The battery assembly with a smaller volume cannot meet the growing usage requirements of users for vehicles. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to propose a chassis with a more optimized structural layout.

[0005] The utility model further proposes a vehicle.

[0006] The chassis according to the utility model includes: longitudinal beams, the longitudinal beams extend in the front-rear direction and there are two of them, and the two longitudinal beams are spaced apart from each other in the left-right direction; a battery assembly, the battery assembly is arranged between the two longitudinal beams and is arranged adjacent to the rear end of the longitudinal beams; a rear axle assembly, the rear axle assembly includes a rear axle component, a drive shaft component and a leaf spring component, the rear axle component extends in the left-right direction and is spaced in front of the battery assembly, and the left and right ends of the rear axle component are adapted to be connected to the left and right rear wheels of the vehicle; the drive shaft component extends in the front-rear direction and is located between the two longitudinal beams, the rear end of the drive shaft component is connected to the rear axle component, the leaf spring components extend in the front-rear direction and there are two of them, the two leaf spring components are respectively located on the outer sides of the two longitudinal beams far away from each other in the left-right direction, the two leaf spring components are respectively connected to the two longitudinal beams in one-to-one correspondence, and the left and right ends of the rear axle component are respectively connected to the two leaf spring components.

[0007] Thus, on the premise that leaf spring members are used as the suspension springs of the vehicle, the rear axle members are arranged at intervals on the front side of the battery assembly and connected to the leaf spring members. On the premise of improving the vibration damping performance of the vehicle, it can not only prevent the interference of the setting of the battery assembly on the rear axle members, but also the rear axle members will not occupy the space for the installation and setting of the battery assembly. Therefore, not only can the volume of the battery assembly be increased, but also the installation and setting of the battery assembly can be facilitated, so that the space can be reasonably utilized, the structural layout of the chassis can be optimized, and the overall structure of the chassis can be made more compact. In addition, the rear axle members can also provide certain protection for the battery assembly and can buffer and absorb the external force received by the chassis from front to back.

[0008] In some examples of the present utility model, it further includes connecting bolts. The leaf spring members are located above the rear axle members. Threaded holes are provided on the rear axle members. The connecting bolts are U-shaped and are arranged around the outside of the leaf spring members. The lower ends of the connecting bolts correspond to and are connected to the threaded holes to connect and fix the leaf spring members and the rear axle members.

[0009] In some examples of the present utility model, two connecting bolts are correspondingly provided for each leaf spring member. The two connecting bolts are arranged at intervals in the front and rear directions on the leaf spring member. The two connecting bolts are respectively located on the front and rear sides of the rear axle member and are respectively connected to the threaded holes on the front and rear sides of the rear axle member.

[0010] In some examples of the present utility model, a buffer gasket is provided on the upper side of the leaf spring member. The buffer gasket is located between the connecting bolt and the leaf spring member. A first positioning portion is provided on the leaf spring member, and a second positioning portion is provided on the buffer gasket. One of the first positioning portion and the second positioning portion is a positioning hole, and the other is a positioning protrusion. The positioning hole and the positioning protrusion are in positioning cooperation.

[0011] In some examples of the present utility model, the distance between the rear end of the rear axle member and the leaf spring member in the front-rear direction is L1, and the distance between the front end of the rear axle member and the leaf spring member in the front-rear direction is L2. L1 and L2 satisfy the relationship: L1 > L2.

[0012] In some examples of the present utility model, the rear axle assembly further includes shock absorbers. The first end of the shock absorber is connected to the rear axle member, and the second end of the shock absorber is connected to the longitudinal beam. There are two shock absorbers, and the two shock absorbers correspond to the two longitudinal beams one by one.

[0013] In some examples of the present utility model, the second end of the shock absorber is arranged at intervals on the rear side of the front end of the leaf spring member.

[0014] In some examples of the present utility model, both of the two shock absorbers are located between the two leaf spring members and are respectively arranged at intervals with the two leaf spring members in the left-right direction.

[0015] In some examples of the present utility model, the rear axle member is located below the two longitudinal beams and is spaced apart from the two longitudinal beams. Buffer limit blocks are respectively arranged on the parts of the two longitudinal beams corresponding to the rear axle member, and the buffer limit blocks are selectively pressed and limited in cooperation with the rear axle member.

[0016] The vehicle according to an embodiment of the present utility model includes: the chassis described above.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic diagram of a chassis according to an embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of a chassis according to an embodiment of the present utility model;

[0021] Figure 3 is a schematic diagram of a chassis according to an embodiment of the present utility model;

[0022] Figure 4 is a schematic diagram of a chassis according to an embodiment of the present utility model;

[0023] Figure 5 is a partial schematic diagram of a chassis according to an embodiment of the present utility model;

[0024] Figure 6 is a partial schematic diagram of a chassis according to an embodiment of the present utility model.

[0025] Reference Signs:

[0026] 100, chassis;

[0027] 10, longitudinal beam; 101, avoidance hole;

[0028] 20, battery module installation area;

[0029] 30, rear axle assembly; 301, rear axle member; 302, drive shaft member; 303, leaf spring member;

[0030] 3011, threaded hole; 3012, limit plate; 3031, first positioning portion; 3032, front hanger support; 3033, rear hanger support;

[0031] 40. Connecting bolt;

[0032] 50. Buffer gasket; 501. Second positioning part;

[0033] 60. Shock absorber; 601. First end; 602. Second end; 603. First mounting bracket; 604. Second mounting bracket;

[0034] 70. Buffer limit block; 701. Limit mounting bracket;

[0035] 80. Rear crossbeam. Detailed implementation manner

[0036] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the drawings are exemplary. The embodiments of the present utility model will be described in detail below.

[0037] Below, refer to Figures 1-6 Describe the chassis 100 according to the embodiments of the present utility model. The chassis 100 can be applied to a vehicle.

[0038] Combined with Figures 1-6 As shown, the chassis 100 according to the present utility model mainly includes: longitudinal beams 10, a battery assembly, and a rear axle assembly 30. Among them, the longitudinal beams 10 extend in the front-rear direction and there are two of them. The two longitudinal beams 10 are spaced apart in the left-right direction. The longitudinal beams 10 can not only provide reliable support and mounting points for other components, but also be used to buffer road excitations and collision energies, and can play a certain protective role for the components installed on or around the longitudinal beams 10, and can ensure the stability and reliability of the vehicle chassis 100.

[0039] Furthermore, the battery assembly is arranged between the two longitudinal beams 10 and adjacent to the rear end of the longitudinal beams 10. When a vehicle has a frontal or side collision, the longitudinal beams 10 can absorb a part of the collision energy first. In this way, the protection effect on the battery assembly can be improved, the risk of battery damage can be reduced, and the safety and reliability of the vehicle can be improved.

[0040] Furthermore, the rear axle assembly 30 includes a rear axle part 301, a drive shaft part 302, and a leaf spring part 303. The rear axle part 301 extends in the left-right direction and is spaced in front of the battery assembly. When a vehicle has a frontal or side collision, the rear axle part 301 can also absorb a part of the collision energy first. In this way, the protection effect on the battery assembly can be further improved, the vehicle accident caused by the damage of the battery assembly due to collision can be effectively prevented, and the safety and reliability of the vehicle can be further improved.

[0041] Further, the left and right ends of the rear axle member 301 are adapted to be connected to the left and right rear wheels of the vehicle. This can not only provide reliable support and mounting points for the left and right rear wheels of the vehicle, but also transmit the power from the engine or motor to the left and right rear wheels through the rear axle member 301, ensuring the normal driving function and normal steering function of the vehicle.

[0042] Further, the drive shaft member 302 extends in the front-rear direction and is located between the two longitudinal beams 10. The rear end of the drive shaft member 302 is connected to the rear axle member 301. Through the drive shaft member 302, power and torque can be transmitted to the rear axle member 301, and then the rear axle member 301 transmits the power and torque to the left and right rear wheels. Thus, it can not only ensure the normal driving of the vehicle, but also enable the vehicle to adapt to different movement requirements.

[0043] Further, the leaf spring members 303 extend in the front-rear direction and there are two of them. The two leaf spring members 303 are respectively located on the outer sides of the two longitudinal beams 10 away from each other in the left-right direction. The two leaf spring members 303 are respectively connected to the two longitudinal beams 10 in a one-to-one correspondence, and the left and right ends of the rear axle member 301 are respectively connected to the two leaf spring members 303. With such a setting, when the vehicle is driving on an uneven road surface, the bumps on the road surface will cause the wheels to bounce up and down. The leaf spring members 303 can absorb and buffer the impact and vibration from the road surface through their own deformation, enabling the wheels to fit the road surface as much as possible, reducing the vibration transmitted to the vehicle body, improving the riding comfort of the vehicle and the safety of the goods in the vehicle. In addition, the leaf spring members 303 can also play a supporting role, and the leaf spring members 303, the longitudinal beams 10, and the rear axle member 301 jointly maintain the structural strength and stability of the rear part of the vehicle.

[0044] Therefore, on the premise that the leaf spring members 303 are used as the suspension springs of the vehicle, the rear axle member 301 is spaced in front of the battery assembly and connected to the leaf spring members 303. On the premise of improving the vibration damping performance of the vehicle, it can not only prevent the setting of the battery assembly from interfering with the rear axle member 301, but also the rear axle member 301 does not occupy the space for the installation of the battery assembly. Thus, it can not only increase the volume of the battery assembly, but also facilitate the installation of the battery assembly, making rational use of space, optimizing the structural layout of the chassis 100, and making the overall structure of the chassis 100 more compact. In addition, the rear axle member 301 can also provide certain protection for the battery assembly, buffering and absorbing the external force on the chassis 100 from front to back.

[0045] It should be noted that the battery assembly is installed in the battery assembly installation area 20, located behind the rear axle member 301.

[0046] In some embodiments of the present invention, components such as a drive shaft, a main reducer, and a differential can be provided in the rear axle member 301 to ensure the normal driving of the vehicle.

[0047] Combined Figure 1 、 Figure 2 and Figure 3 As shown, the chassis 100 further includes a connecting bolt 40. The leaf spring member 303 is located above the rear axle member 301. A threaded hole 3011 is provided on the rear axle member 301. The connecting bolt 40 is U-shaped and is disposed around the outside of the leaf spring member 303. The lower end of the connecting bolt 40 corresponds to and is connected to the threaded hole 3011 to connect and fix the leaf spring member 303 and the rear axle member 301. Specifically, by disposing the U-shaped connecting bolt 40 around the outside of the leaf spring member 303 and connecting the lower end of the connecting bolt 40 to the threaded hole 3011 of the rear axle member 301, the leaf spring member 303 is connected and fixed above the rear axle member 301. This not only makes the connection between the leaf spring member 303 and the rear axle member 301 simple, direct, stable and reliable, but also facilitates the installation and disassembly between the leaf spring member 303 and the rear axle member 301, facilitates the subsequent maintenance and repair of the leaf spring member 303 and the rear axle member 301, and can improve the rationality and reliability of the structural setting of the chassis 100.

[0048] Combined Figure 1 、 Figure 2 and Figure 3 As shown, two connecting bolts 40 are correspondingly provided for each leaf spring member 303. The two connecting bolts 40 are arranged at intervals in the front and rear on the leaf spring member 303. The two connecting bolts 40 are respectively located on the front and rear sides of the rear axle member 301 and are respectively connected to the threaded holes 3011 on the front and rear sides of the rear axle member 301. Specifically, by connecting the two connecting bolts 40 arranged at intervals in the front and rear to the threaded holes 3011 on the front and rear sides of the rear axle member 301 respectively, the leaf spring member 303 and the rear axle member 301 are connected and fixed. This can further improve the connection strength and connection stability between the leaf spring member 303 and the rear axle member 301. Thus, not only can the situation that the connection part between the leaf spring member 303 and the rear axle member 301 is deformed or broken due to stress concentration be prevented, but also the relative rotation between the leaf spring member 303 and the rear axle member 301 can be prevented, so that the leaf spring member 303 is tilted and then affects the normal working performance of the leaf spring member 303, and the stability and reliability of the structure of the chassis 100 can be improved.

[0049] In some embodiments of the present invention, a supporting tile member that fits with the rear axle member 301 can be provided below the rear axle member 301, and a threaded hole 3011 is provided on the supporting tile member. The leaf spring member 303 and the rear axle member 301 are connected and fixed through the positioning cooperation of the connecting bolt 40 and the threaded hole 3011 on the supporting tile member. This not only can ensure the reliability of the connection between the leaf spring member 303 and the rear axle member 301, but also can reduce the wear or damage caused by the connection structure to the rear axle member 301.

[0050] Combined Figure 1 、 Figure 2 and Figure 3As shown, a buffer gasket 50 is provided on the upper side of the leaf spring member 303. The buffer gasket 50 is located between the connecting bolt 40 and the leaf spring member 303. A first positioning portion 3031 is provided on the leaf spring member 303, and a second positioning portion 501 is provided on the buffer gasket 50. One of the first positioning portion 3031 and the second positioning portion 501 is a positioning hole, and the other is a positioning protrusion. The positioning hole and the positioning protrusion are in positioning cooperation. Specifically, by passing the positioning protrusion through the positioning hole, the first positioning portion 3031 and the second positioning portion 501 are connected and fixed together, so that the buffer gasket 50 is disposed between the leaf spring member 303 and the connecting bolt 40. In this way, not only can the connection between the leaf spring member 303 and the buffer gasket 50 be simple, direct, stable and reliable, but also the installation and disassembly between the buffer gasket 50 and the leaf spring member 303 can be facilitated. Further, the setting of the buffer gasket 50 can reduce the extrusion and wear of the connecting bolt 40 on the leaf spring member 303. The protection effect on the leaf spring member 303 can be maintained by replacing the buffer gasket 50, the service life of the leaf spring member 303 can be extended, and the maintenance cost of the vehicle can be reduced.

[0051] Combined with Figure 1 、 Figure 2 and Figure 3 As shown, the distance between the rear axle member 301 and the rear end of the leaf spring member 303 in the front-rear direction is L1, and the distance between the rear axle member 301 and the front end of the leaf spring member 303 in the front-rear direction is L2. L1 and L2 satisfy the relationship: L1 > L2. Specifically, in the front-rear direction, by making the distance between the rear axle member 301 and the rear end of the leaf spring member 303 greater than the distance between the rear axle member 301 and the front end of the leaf spring member 303, not only can sufficient space be reserved for the placement of the battery assembly while ensuring the structural stability of the chassis 100, but also a certain protection effect can be provided for the battery assembly, and the rationality and reliability of the structural setting of the chassis 100 can be ensured.

[0052] In some embodiments of the present invention, the front end of the leaf spring member 303 can be connected to the longitudinal beam 10 through the front hanger support 3032, and the rear end of the leaf spring member 303 can be connected to the rear cross beam 80 through the rear hanger support 3033. Then, the connection between the longitudinal beam 10 and the rear end of the leaf spring member 303 is realized through the rear cross beam 80. The leaf spring member 303 and the rear hanger support 3033 can rotate relative to each other. Since the leaf spring member 303 has elastic properties, the leaf spring member 303 and the front hanger support 3032 may not rotate relative to each other. In this way, the normal function of the leaf spring member 303 can be ensured, and the normal working performance of the chassis 100 can be ensured.

[0053] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the rear axle assembly 30 further includes shock absorbers 60. The first end 601 of the shock absorber 60 is connected to the rear axle member 301, and the second end 602 of the shock absorber 60 is connected to the longitudinal beam 10. There are two shock absorbers 60, and the two shock absorbers 60 correspond to the two longitudinal beams 10 one by one. Specifically, by respectively arranging a shock absorber 60 between the two longitudinal beams 10 and the rear axle member 301, not only can a certain supporting effect be provided for the longitudinal beam 10, preventing the longitudinal beam 10 from deforming or twisting, but also the vibration energy transmitted to the structure of the shock absorber 60 can be absorbed or attenuated, effectively reducing the vibration energy transmitted from the chassis 100 structure to the vehicle body, and improving the stability and ride experience of the vehicle.

[0054] In some embodiments of the present invention, the first end 601 of the shock absorber 60 can be connected to the rear axle member 301 through the first mounting bracket 603, and the second end 602 of the shock absorber 60 can be connected to the longitudinal beam 10 through the second mounting bracket 604. This can improve the reliability of the connection between the first end 601 of the shock absorber 60 and the rear axle member 301, as well as the reliability of the connection between the second end 602 of the shock absorber 60 and the longitudinal beam 10, and ensure the normal working performance of the shock absorber 60.

[0055] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the second end 602 of the shock absorber 60 is arranged at the rear side of the front end of the leaf spring member 303 at intervals. Specifically, by arranging the second end 602 of the shock absorber 60 at the rear side of the front end of the leaf spring member 303 at intervals, not only can the balance of the weight distribution of the chassis 100 structure be ensured, but also the rationality and stability of the chassis 100 structure arrangement can be ensured.

[0056] Combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the two shock absorbers 60 are both located between the two leaf spring members 303 and are respectively arranged at intervals with the two leaf spring members 303 in the left-right direction. Specifically, by arranging the two shock absorbers 60 both between the two leaf spring members 303 and respectively arranging them at intervals with the two leaf spring members 303 in the left-right direction, not only can the leaf spring members 303 and the shock absorbers 60 play their respective roles independently without interference, but also it is convenient for subsequent replacement and maintenance of the leaf spring members 303 and the shock absorbers 60.

[0057] Furthermore, although the leaf spring member 303 can buffer a part of the road surface impact, there may be a certain amount of after-vibration during the rebound process. The shock absorber 60 can timely suppress this after-vibration, enabling the vehicle to return to a stable state more quickly after passing through a bumpy road surface. Thus, the leaf spring member 303 and the shock absorber 60 are arranged at intervals and cooperate with each other, and can act together to improve the ride comfort of the vehicle.

[0058] Combined with Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown in the figure, the rear axle member 301 is located below the two longitudinal beams 10 and is arranged at intervals with the two longitudinal beams 10. Buffer limit blocks 70 are respectively arranged at the parts of the two longitudinal beams 10 corresponding to the rear axle member 301, and the buffer limit blocks 70 are selectively pressed and limited in cooperation with the rear axle member 301. Specifically, by respectively arranging buffer limit blocks 70 at the parts of the two longitudinal beams 10 corresponding to the rear axle member 301, the upward movement position of the rear axle member 301 can be limited during the vehicle driving process, the direct contact between the rear axle member 301 and the longitudinal beam 10 can be prevented, so that the rear axle member 301 and the longitudinal beam 10 are not collided or worn, the service life of the rear axle member 301 and the longitudinal beam 10 can be prolonged, and the structural strength and stability of the chassis 100 structure can be improved.

[0059] Combined with Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown in the figure, the buffer limit block 70 can be connected and fixed to the lower part of the longitudinal beam 10 through a limit mounting bracket 701. Among them, the limit mounting bracket 701 is attached to the lower bottom surface of the longitudinal beam 10, and the limit mounting bracket 701 is bent upward to be attached to the two side surfaces of the longitudinal beam 10. The connection method between the limit mounting bracket 701 and the longitudinal beam 10 can adopt welding, which can ensure the reliability of the connection between the limit mounting bracket 701 and the longitudinal beam 10.

[0060] Furthermore, one or more mounting holes are arranged on the buffer limit block 70, and one or more corresponding mounting holes are arranged on the limit mounting bracket 701. By sequentially passing fasteners through the mounting holes on the buffer limit block 70 and the mounting holes on the limit mounting bracket 701, the buffer limit block 70 and the limit mounting bracket 701 are connected and fixed together. In this way, not only can the connection between the buffer limit block 70 and the limit mounting bracket 701 be simple, direct, stable and reliable, but also the installation and disassembly between the buffer limit block 70 and the limit mounting bracket 701 are convenient.

[0061] Furthermore, a limit plate 3012 is correspondingly arranged on the rear axle member 301 for abutting against the buffer limit block 70 after the rear axle member 301 moves upward to realize the limit of the rear axle member 301.

[0062] Further, the limiting mounting bracket 701 can be provided with rib structures, which can ensure good electrophoretic effect of the parts, are not prone to water retention, and have good rust prevention performance.

[0063] Still further, the longitudinal beam 10 can be provided with avoidance holes 101 for avoiding fasteners connecting the buffer limiting block 70 and the limiting mounting bracket 701. In addition, corresponding mounting holes can also be provided on the longitudinal beam 10, so that the fasteners pass through the buffer limiting block 70, the limiting mounting bracket 701, and the longitudinal beam 10 in sequence, thereby connecting and fixing the buffer limiting block 70, the limiting mounting bracket 701, and the longitudinal beam 10 together.

[0064] In some embodiments of the present invention, the mounting holes on the buffer limiting block 70 and the limiting mounting bracket 701 can be threaded holes, and the fasteners passing through the mounting holes can be bolts.

[0065] In some embodiments of the present invention, in the chassis 100 structural solution, when passing through off-road or harsh road conditions, the left and right wheels connected to both ends of the rear axle member 301 are in a linkage state. When one wheel encounters an obstacle, the other wheel can still maintain good ground contact, which can improve the passability and stability of the vehicle.

[0066] The vehicle according to the present invention may mainly include: the above-mentioned chassis 100. Specifically, since the structure of the chassis 100 is more compact and has good working performance, applying the chassis 100 to the vehicle can not only improve the safety and comfort of the vehicle, but also improve the stability and reliability of the vehicle.

[0067] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0068] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0069] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A chassis, characterized in that: include: A longitudinal beam, wherein the longitudinal beam is extended in the front-rear direction and is in two pieces, and the two longitudinal beams are spaced apart from each other in the left-right direction; A battery assembly, wherein the battery assembly is disposed between the two longitudinal beams and adjacent to the rear end of the longitudinal beams; A rear axle assembly, the rear axle assembly comprising a rear axle member, a transmission shaft member and a leaf spring member, the rear axle member extending in the left-right direction and spaced apart at the front side of the battery assembly, the left and right ends of the rear axle member being suitable for connecting to the left and right rear wheels of the vehicle; The transmission shaft extends in the front-to-rear direction and is located between the two longitudinal beams. The rear end of the transmission shaft is connected to the rear axle member. The leaf spring member extends in the front-to-rear direction and is two in number. The two leaf spring members are respectively located on the outsides of the two longitudinal beams away from each other in the left-right direction. The two leaf spring members are respectively connected to the two longitudinal beams in a one-to-one correspondence. The left and right ends of the rear axle member are respectively connected to the two leaf spring members.

2. The chassis according to claim 1, characterized in that: It also includes a connecting bolt, the leaf spring component is located above the rear bridge component, a threaded hole is provided on the rear bridge component, the connecting bolt is U-shaped and is arranged around the outside of the leaf spring component, and the lower end of the connecting bolt is connected to the threaded hole correspondingly to connect and fix the leaf spring component and the rear bridge component.

3. The chassis according to claim 2, characterized in that: Each leaf spring member is correspondingly provided with two connecting bolts, which are spaced apart front and rear on the leaf spring member. The two connecting bolts are respectively located at the front and rear sides of the rear bridge member and are respectively connected to the threaded holes at the front and rear sides of the rear bridge member.

4. The chassis according to claim 3, characterized in that: A buffer gasket is provided on the upper side of the leaf spring component, and the buffer gasket is located between the connecting bolt and the leaf spring component. A first positioning portion is provided on the leaf spring component, and a second positioning portion is provided on the buffer gasket. One of the first positioning portion and the second positioning portion is a positioning hole, and the other is a positioning protrusion. The positioning hole and the positioning protrusion are positioned and matched.

5. The chassis according to claim 1, characterized in that: The distance between the rear end of the rear bridge member and the leaf spring member in the front-to-back direction is L1, and the distance between the rear bridge member and the front end of the leaf spring member in the front-to-back direction is L2. L1 and L2 satisfy the relationship: L1>L2.

6. The chassis according to claim 5, characterized in that The rear axle assembly also includes a shock absorber, a first end of the shock absorber is connected to the rear axle member, and a second end of the shock absorber is connected to the longitudinal beam. There are two shock absorbers, and the two shock absorbers correspond to the two longitudinal beams one by one.

7. The chassis according to claim 6, characterized in that The second end of the shock absorber is spaced apart and arranged at the rear side of the front end of the leaf spring member.

8. The chassis according to claim 6, characterized in that: The two shock absorbers are both located between the two leaf spring members and are respectively spaced apart from the two leaf spring members in the left-right direction.

9. The chassis according to claim 1, characterized in that: The rear axle component is located below the two longitudinal beams and is spaced apart from the two longitudinal beams. The portions of the two longitudinal beams corresponding to the rear axle component are respectively provided with buffer limit blocks, and the buffer limit blocks are selectively extruded and limitedly matched with the rear axle component.

10. A vehicle, characterized in that: A chassis comprising the chassis described in any one of claims 1-9.

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