Rear axle assembly and new energy vehicle chassis

Abstract

The application belongs to the field of vehicle engineering and particularly relates to a rear axle assembly and a new energy vehicle chassis. The rear axle assembly comprises a rear axle main body and two suspension mechanisms arranged on the rear axle main body. At least two rear upper push rods and at least two rear lower push rods are rotatably connected to the rear axle main body in an up-down distribution, and the rear upper push rods and the rear lower push rods are connected with a vehicle frame. The new energy vehicle chassis comprises a vehicle frame, a front axle assembly, a steering system assembly and the rear axle assembly. The new energy vehicle chassis has stronger adaptability and can adapt to different types of road conditions and driving styles. No matter on urban roads, rural roads or highways, the four composite damping assemblies can play an excellent damping role, improve the vehicle ride comfort and ensure the stability and comfort of the vehicle.

Description

Technical Field

[0001] This invention belongs to the field of vehicle engineering, specifically relating to a rear axle assembly and a chassis for new energy vehicles. Background Technology

[0002] As people's living standards improve, their demands for the comfort of buses also increase. New energy buses, with their advantages of low noise and environmental friendliness, are gradually replacing traditional fuel buses.

[0003] However, the current new energy buses use leaf spring or dual airbag structures for their front and rear axle assemblies, which cannot adapt to the bumpy roads and long downhill slopes in rural areas and tourist attractions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a rear axle assembly that adopts composite shock absorption, which can effectively improve the ride smoothness of the vehicle and enhance its adaptability and comfort.

[0005] This invention provides a rear axle assembly and a new energy vehicle chassis, comprising:

[0006] The rear axle body has at least two upper rear thrust rods and at least two lower rear thrust rods rotatably connected to it, and the upper and lower rear thrust rods are connected to the vehicle frame.

[0007] Two suspension mechanisms are installed on the rear axle body. The suspension mechanism includes: a beam and two rear composite shock absorbers respectively installed at both ends of the beam. The rear composite shock absorbers are connected to the vehicle frame.

[0008] Optionally, the rear composite shock absorber assembly includes a rear airbag shock absorber and a rear spring shock absorber arranged side by side, both of which are connected to the vehicle frame.

[0009] Optionally, the two rear upper thrust rods are arranged in a V-shape, and the ends of the two rear upper thrust rods are connected close to the middle of the rear axle body.

[0010] Optionally, the two rear lower thrust rods are horizontally distributed and close to the two profile beams respectively.

[0011] Optionally, the end of the beam is also provided with a rear height valve.

[0012] Optionally, the rear axle assembly also includes a rear stabilizer bar that is hinged at both ends to two suspension mechanisms and is connected to the vehicle frame.

[0013] The present invention provides a new energy vehicle chassis, including a frame, a front axle assembly, a steering system assembly, and a rear axle assembly. The steering system assembly is used to control the steering of the vehicle. The front axle assembly is located at the front bottom of the frame, and the rear axle assembly is located at the rear bottom of the frame.

[0014] Optionally, the front axle assembly includes a front beam, two mounting seats disposed on the front beam, a front composite shock absorber assembly disposed on the mounting seats, two front upper thrust rods respectively rotatably disposed on the two mounting seats, and two front lower thrust rods rotatably disposed on the front beam. The front composite shock absorber assembly, the front upper thrust rods, and the front lower thrust rods are all connected to the vehicle frame.

[0015] Optionally, the front composite shock absorber assembly includes a front airbag shock absorber and a front spring shock absorber arranged side by side, both of which are connected to the vehicle frame.

[0016] Optionally, the front axle assembly further includes a front stabilizer bar that is hinged at both ends to the front beam, and the front stabilizer bar is connected to the vehicle frame.

[0017] The beneficial effects of this invention are that the two upper rear thrust rods and two lower rear thrust rods distributed vertically can increase the stability of the connection between the rear axle assembly and the frame, reduce the lateral displacement of the rear axle assembly relative to the frame, thereby improving the stability of the vehicle body during driving. A total of four rear composite shock absorber components are set on the two beams. Compared with a single leaf spring structure or a dual airbag structure, it has stronger adaptability and can adapt to different types of road conditions and driving styles. Whether on urban roads, rural roads or highways, the four composite shock absorber components can play an excellent shock absorption role, improve the smoothness of vehicle driving, and ensure the stability and comfort of the vehicle. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the rear axle assembly of the present invention;

[0019] Figure 2 This is a schematic diagram of the front axle assembly of the present invention;

[0020] Figure 3 This is a schematic diagram of the steering system assembly of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the new energy vehicle chassis of the present invention.

[0022] In the diagram: 100, Rear axle assembly; 110, Rear axle body; 111, Rear upper thrust rod; 112, Rear lower thrust rod; 113, Rear stabilizer bar; 114, Brake; 120, Suspension mechanism; 121, Beam; 122, Rear airbag shock absorber; 123, Rear spring shock absorber; 124, Rear height valve; 200, Frame; 210, Front suspension frame; 220, Front axle frame; 230, Mid-section frame; 240, Rear axle frame; 250, Tail section. Section frame; 300, front axle assembly; 310, front beam; 320, mounting bracket; 330, front airbag shock absorber; 340, front spring shock absorber; 350, front upper thrust rod; 360, front lower thrust rod; 370, front stabilizer bar; 380, front height valve; 400, steering system assembly; 410, steering wheel; 420, steering column; 430, steering gear; 440, steering drop arm; 450, front tie rod; 460, transition rocker arm; 470, rear tie rod. Detailed Implementation

[0023] like Figure 1 As shown, the present invention provides a rear axle assembly, comprising: a rear axle body 110 and two suspension mechanisms 120 disposed on the rear axle body 110, wherein at least two rear upper thrust rods 111 and at least two rear lower thrust rods 112 are rotatably connected to the rear axle body 110, and the rear upper thrust rods 111 and rear lower thrust rods 112 are connected to the vehicle frame 200; the suspension mechanism 120 comprises: a beam 121 and two rear composite shock absorbers respectively disposed at both ends of the beam 121, and the rear composite shock absorbers are connected to the vehicle frame 200.

[0024] Compared with the prior art, the rear axle assembly 100 provided by the present invention, with two upper rear thrust rods 111 and two lower rear thrust rods 112 distributed vertically, can increase the stability of the connection between the rear axle assembly 100 and the frame 200, reduce the lateral displacement of the rear axle assembly 100 relative to the frame 200, thereby improving the stability of the vehicle body during driving. A total of four rear composite shock absorber components are set on the two beams 121. Compared with a single leaf spring structure or a dual airbag structure, it has stronger adaptability and can adapt to different types of road conditions and driving styles. Whether on urban roads, rural roads or highways, the four composite shock absorber components can play an excellent shock absorption role, improve the smoothness of vehicle driving, and ensure the stability and comfort of the vehicle.

[0025] It should be noted that beam 121 is a C-shaped beam 121, and the two beams 121 are symmetrically distributed.

[0026] In one embodiment, the rear composite damping assembly includes a rear airbag shock absorber 122 and a rear spring shock absorber 123 arranged side-by-side, both of which are connected to the vehicle frame 200. It is understood that the combined use of the rear airbag shock absorber 122 and the rear spring shock absorber 123 can fully leverage their respective advantages to maximize the damping effect; furthermore, compared to a single damping system, the combined damping system may be easier to maintain because the two shock absorbers can complement each other, reducing wear and failure rates of individual components. This combined damping assembly is suitable for passenger cars, commercial vehicles, and special vehicles, exhibiting broad applicability.

[0027] It should be noted that the rear spring shock absorber 123 is located at the end of the beam 121, and its top is connected to the shock absorber bracket of the rear axle section of the frame 200; the rear airbag shock absorber 122 is located close to the shock absorber, one end of which is connected to the airbag mounting seat 320 on the beam 121, and the other end is connected to the airbag cover plate of the rear axle section frame 240.

[0028] In one embodiment, the two rear upper thrust rods 111 are arranged in a V-shape, and the ends of the two rear upper thrust rods 111 are connected close to the middle of the rear axle body 110. Understandably, the V-shaped structure formed by the two rear upper thrust rods 111 more comprehensively prevents displacement of the rear axle assembly 100. Besides preventing front-to-back displacement, it also effectively avoids lateral displacement. This is because, during vehicle cornering, the rear axle assembly 100 may shift laterally due to mechanical forces, leading to friction between the shock absorber and the tire, and in severe cases, even causing premature tire wear or tire blowouts. The unique structural design of the V-shaped thrust rods effectively addresses the potential lateral displacement of the rear axle assembly 100 during vehicle cornering.

[0029] In one embodiment, two rear lower thrust rods 112 are horizontally distributed and close to two beams 121 respectively, mainly to limit the forward and backward displacement of the rear axle system.

[0030] In one embodiment, the end of the beam 121 is also provided with a rear height valve 124. Understandably, the rear airbag shock absorber 122 is equipped with the rear height valve 124, which can adjust the air pressure inside the airbag as needed, thereby changing the stiffness of the rear spring shock absorber 123 to better adapt to different loads and road conditions.

[0031] In one embodiment, the rear axle assembly 100 further includes a rear stabilizer bar 113, which is hinged at both ends to two suspension mechanisms 120, and is connected to the vehicle frame 200. Specifically, the stabilizer bar assembly consists of a stabilizer bar and a hanger. One end of the hanger is connected to a hanger bracket on the beam 121, and the stabilizer bar is provided with a fixing seat that is connected to the rear axle section frame 240. The rear stabilizer bar 113 is U-shaped, laterally positioned, and faces the front of the vehicle. When the vehicle body tilts, it can generate elastic force through torsion to resist the tilt of the vehicle, thus achieving lateral stability.

[0032] In this embodiment, brakes 114 are provided at both ends of the rear axle body 110.

[0033] like Figure 4 As shown, this embodiment of the invention provides a new energy vehicle chassis, including a frame 200, a front axle assembly 300, a steering system assembly 400, and a rear axle assembly 100. The steering system assembly 400 is used to control the vehicle's steering. The front axle assembly 300 is located at the front bottom of the frame 200, and the rear axle assembly 100 is located at the rear bottom of the frame 200. The rear axle assembly 100 improves the ride smoothness of the new energy vehicle chassis, ensuring vehicle stability and comfort.

[0034] In one embodiment, such as Figure 3 As shown, the front axle assembly 300 includes a front beam 310, two mounting seats 320 mounted on the front beam 310, a front composite shock absorber assembly mounted on the mounting seats 320, two front upper thrust rods 350 rotatably mounted on the two mounting seats 320, and two front lower thrust rods 360 rotatably mounted on the front beam 310. The front composite shock absorber assembly, the front upper thrust rods 350, and the front lower thrust rods 360 are all connected to the frame 200. It is understandable that the front axle assembly 300, with its four thrust rods and dual front composite shock absorber assembly structure, can improve vehicle ride smoothness and ensure vehicle stability and comfort.

[0035] Furthermore, the two front lower thrust rods 360 are arranged in a V-shape, and the ends of the two front lower thrust rods 360 are connected close to the middle of the front beam 310. Understandably, the V-shaped structure formed by the two front lower thrust rods 360 more comprehensively prevents the front axle assembly 300 from shifting, and can not only prevent forward and backward shifting, but also effectively prevent lateral shifting.

[0036] In this embodiment, the front beam 310 is an arch beam.

[0037] In one embodiment, the front composite damping assembly includes a front airbag shock absorber 330 and a front spring shock absorber 340 arranged side-by-side, both of which are connected to the vehicle frame 200. It is understood that the combined use of the front airbag shock absorber 330 and the front spring shock absorber 340 can fully leverage their respective advantages to maximize the damping effect; furthermore, compared to a single damping system, the combined damping system may be easier to maintain because the two shock absorbers can complement each other, reducing wear and failure rates of individual components. This combined damping assembly is suitable for passenger cars, commercial vehicles, and special vehicles, exhibiting broad applicability.

[0038] In one embodiment, such as Figure 2 As shown, the front axle assembly 300 also includes a front stabilizer bar 370 with both ends hinged to the front beam 310, and the front stabilizer bar 370 is connected to the frame 200. Specifically, one end of the front stabilizer bar 370 is bolted to a lug on the mounting base 320, and both ends of the stabilizer bar are symmetrically provided with hangers that are fixedly connected to the frame 200 by bolts. The front stabilizer bar 370 is U-shaped, laterally positioned, and faces the front of the vehicle. When the vehicle body tilts, it can generate elastic force through torsion to resist the tilt of the vehicle, thus achieving lateral stability.

[0039] In one embodiment, a front height valve 380 is also provided on the front beam 310 near the front airbag shock absorber 330. Understandably, the front airbag shock absorber 330 is equipped with the front height valve 380, which can adjust the air pressure inside the airbag as needed, thereby changing the stiffness of the front spring shock absorber 340 to better adapt to different loads and road conditions.

[0040] In one embodiment, the frame 200 is welded together from the front suspension frame 210, the front axle frame 220, the mid-section frame 230, the rear axle frame 240, and the rear frame 250. The steering system assembly 400 is mounted on the front suspension frame 210, the front axle assembly 300 is mounted on the front axle frame 220, and the rear axle assembly 100 is mounted on the rear axle frame 240. The mid-section frame 230 is the luggage compartment area, and the energy storage module is centrally located at the rear of the mid-section frame 230 and the rear frame 250, thereby increasing the luggage compartment volume inside the compartment.

[0041] In one embodiment, the steering system assembly 400 is arranged as a combination of a vertical steering gear and a center rocker arm, employing a purely mechanical hydraulic power steering system. Its working principle is as follows: after the driver applies steering torque to the steering wheel 410, the torque is input to the steering gear 430 through the drive shaft in the steering column 420. The torque is amplified by the steering gear 430 and then transmitted to the steering knuckle arm via the steering drop arm 440, front tie rod 450, and rear tie rod 470, thereby controlling the vehicle's driving posture. Specifically, the steering system assembly 400 is connected as follows: the steering wheel 410 is connected to the top of the steering column 420 assembly; the bottom of the steering column is connected to the steering gear 430 assembly; the output end of the steering gear 430 is connected to the steering drop arm 440; the front tie rod 450 and rear tie rod 470 are connected via a transition rocker arm 460; and the rear tie rod is connected to the front wheel steering knuckle arm to control the vehicle's driving state. The combination of a vertical steering gear and a center rocker arm increases the driver's operating area while also improving the reliability of the steering system.

[0042] The drive system is mounted on the rear axle section frame 240 and the tail section frame 250. The drive system is existing technology and may consist of: a drive motor, a motor controller, and a transmission shaft assembly. The drive motor is fixedly connected to the tail section of the frame 200 via a motor mounting assembly. The output shaft of the drive motor is connected to one end of the transmission shaft assembly, and the other end of the transmission shaft assembly is connected to the rear axle main reduction flange. In addition, the drive system is also equipped with a vehicle retarder as an auxiliary braking device, and the retarder assembly is connected to the rear axle flange via bolts.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0044] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A rear axle assembly comprising: The application relates to a rear axle assembly of a vehicle. The rear axle assembly comprises a rear axle body (110), at least two rear upper push rods (111) and at least two rear lower push rods (112) which are arranged on the rear axle body (110) in an up-down distribution, and a vehicle frame (200) which is connected to the rear upper push rods (111) and the rear lower push rods (112). The rear axle assembly further comprises two suspension mechanisms (120) which are arranged on the rear axle body (110), wherein each of the suspension mechanisms (120) comprises a profile beam (121) and two rear composite shock-absorbing components which are arranged at two ends of the profile beam (121) and are connected to the vehicle frame (200). The rear composite shock-absorbing components each comprise a rear gas bag shock absorber (122) and a rear spring shock absorber (123) which are arranged side by side. The two rear upper push rods (111) are arranged in a V-shaped distribution, and one end of each of the two rear upper push rods (111) is arranged close to the middle of the rear axle body (110).

2. The rear axle assembly of claim 1, wherein, The profile beam (121) is further provided with a rear height valve (124) at an end thereof.

3. The rear axle assembly of claim 1, wherein, The rear axle assembly further comprises a rear transverse stabilizer (113) which is hingedly connected to the two suspension mechanisms (120) at two ends thereof and is connected to the vehicle frame (200).

4. A new energy vehicle chassis, characterized in that, The vehicle comprises a vehicle frame (200), a front axle assembly (300), a steering system assembly (400), and the rear axle assembly (100) of any one of claims 1-3.

5. The new energy vehicle chassis according to claim 4, characterized in that, The front axle assembly (300) comprises a front beam (310), two mounting seats (320) which are arranged on the front beam (310), a front composite shock-absorbing component which is arranged on the mounting seat (320), two front upper push rods (350) which are rotatably arranged on the two mounting seats (320), and two front lower push rods (360) which are rotatably arranged on the front beam (310).

6. The new energy vehicle chassis according to claim 5, characterized in that, The front composite shock-absorbing component comprises a front gas bag shock absorber (330) and a front spring shock absorber (340) which are arranged side by side.

7. The new energy vehicle chassis according to claim 5 or 6, characterized in that, The front axle assembly (300) further comprises a front transverse stabilizer (370) which is hingedly connected to the front beam (310) at two ends thereof and is connected to the vehicle frame (200).

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