Rear axle assembly and new energy vehicle chassis

Abstract

The invention 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, the rear axle main body is rotatably connected with at least two rear upper thrust rods and at least two rear lower thrust rods, and the rear upper thrust rods and the rear lower thrust rods are distributed up and down; the rear upper thrust rod and the rear lower thrust rod are connected with the frame; a new energy vehicle chassis comprises a vehicle frame, a front axle assembly, a steering system assembly and a rear axle assembly, has higher adaptability and can adapt to different types of road surface conditions and driving styles, four composite damping assemblies can play an excellent damping role no matter on urban roads, rural paths or expressways, the vehicle running smoothness is improved, and the service life of the vehicle is prolonged. And the stability and comfort of the vehicle are ensured.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle engineering, and in particular relates to a rear axle assembly and a new energy vehicle chassis. Background Art

[0002] As people's living standards improve, the requirements for bus driving comfort are also increasing. New energy buses have the advantages of low noise and green environmental protection, and are gradually replacing traditional fuel buses.

[0003] However, the current front and rear axle assemblies of new energy buses use leaf spring structures or dual airbag structures, which cannot adapt to bumpy roads and long downhill conditions 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 which adopts composite shock absorption to effectively improve the driving smoothness of the vehicle and enhance the adaptability and comfort.

[0005] The present invention provides a rear axle assembly and a new energy vehicle chassis, comprising: A rear axle body, on which at least two rear upper thrust rods and at least two rear lower thrust rods distributed up and down are rotatably connected, and the rear upper thrust rods and the rear lower thrust rods are connected to the vehicle frame; Two suspension mechanisms are arranged on the rear axle body, and the suspension mechanisms include: a profile beam, and two rear composite shock absorbing components respectively arranged at both ends of the profile beam, and the rear composite shock absorbing components are connected to the vehicle frame.

[0006] Optionally, the rear composite shock-absorbing assembly includes a rear airbag shock absorber and a rear spring shock absorber which are arranged side by side, and the rear airbag shock absorber and the rear spring shock absorber are both connected to the vehicle frame.

[0007] Optionally, the two rear upper thrust rods are distributed in a V-shape, and one end at which the two rear upper thrust rods are connected is close to the middle of the rear axle body.

[0008] Optionally, the two rear lower thrust rods are horizontally distributed and respectively close to two beams.

[0009] Optionally, a rear height valve is also provided at the end of the beam.

[0010] Optionally, the rear axle assembly further includes a rear lateral stabilizer bar with two ends respectively hinged to the two suspension mechanisms, and the rear lateral stabilizer bar is connected to the vehicle frame.

[0011] The present invention provides a new energy vehicle chassis, comprising a vehicle 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 arranged at the front bottom of the vehicle frame, and the rear axle assembly is arranged at the rear bottom of the vehicle frame.

[0012] Optionally, the front axle assembly includes a front beam, two mounting seats arranged on the front beam, a front composite shock-absorbing assembly arranged on the mounting seats, two front upper thrust rods rotatably arranged on the two mounting seats, and two front lower thrust rods rotatably arranged on the front beam, and the front composite shock-absorbing assembly, the front upper thrust rod and the front lower thrust rod are all connected to the frame.

[0013] Optionally, the front composite shock-absorbing assembly includes a front airbag shock absorber and a front spring shock absorber which are arranged side by side, and the front airbag shock absorber and the front spring shock absorber are both connected to the vehicle frame.

[0014] Optionally, the front axle assembly further includes a front lateral stabilizer bar having two ends respectively hinged to the front beam, and the front lateral stabilizer bar is connected to the vehicle frame.

[0015] The beneficial effect of the present invention is that the two rear upper thrust rods and the two rear lower thrust rods distributed up and down 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-absorbing assemblies are arranged on the two beams. Compared with a single leaf spring structure or a dual airbag structure, the four composite shock-absorbing assemblies have stronger adaptability and can adapt to different types of road conditions and driving styles. Whether on urban roads, country roads or highways, the four composite shock-absorbing assemblies can play an excellent shock-absorbing role, improve the smoothness of vehicle driving, and ensure the stability and comfort of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the rear axle assembly of the present invention; Figure 2 It is a structural schematic diagram of the front axle assembly of the present invention; Figure 3 It is a structural schematic diagram of the steering system assembly of the present invention; Figure 4 It is a structural schematic diagram of the chassis of the new energy vehicle of the present invention.

[0017] In the figure: 100, rear axle assembly; 110, rear axle body; 111, rear upper thrust rod; 112, rear lower thrust rod; 113, rear lateral 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 section frame; 220, front axle section frame; 230, middle section frame; 240, rear axle section frame; 250, tail Section frame; 300, front axle assembly; 310, front beam; 320, mounting seat; 330, front airbag shock absorber; 340, front spring shock absorber; 350, front upper thrust rod; 360, front lower thrust rod; 370, front lateral 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 DESCRIPTION

[0018] like Figure 1 As shown, a rear axle assembly provided by the present invention includes: a rear axle body 110 and two suspension mechanisms 120 arranged on the rear axle body 110, wherein the rear axle body 110 is rotatably connected with at least two rear upper thrust rods 111 and at least two rear lower thrust rods 112 distributed up and down, and the rear upper thrust rods 111 and the rear lower thrust rods 112 are connected to the frame 200; the suspension mechanism 120 includes: a beam 121, two rear composite shock-absorbing assemblies respectively arranged at both ends of the beam 121, and the rear composite shock-absorbing assemblies are connected to the frame 200.

[0019] Compared with the prior art, the rear axle assembly 100 provided by the present invention, the two rear upper thrust rods 111 and the two rear lower thrust rods 112 distributed up and down 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, and thus improve the stability of the vehicle body during driving. A total of four rear composite shock-absorbing assemblies are arranged on the two beams 121. Compared with a single leaf spring structure or a dual airbag structure, the four composite shock-absorbing assemblies have stronger adaptability and can adapt to different types of road conditions and driving styles. Whether on urban roads, country roads or highways, the four composite shock-absorbing assemblies can play an excellent shock-absorbing role, improve the smoothness of vehicle driving, and ensure the stability and comfort of the vehicle.

[0020] It should be noted that the beam 121 is a C-beam 121 , and the two beams 121 are symmetrically distributed.

[0021] In one embodiment, the rear composite shock-absorbing assembly includes a rear airbag shock absorber 122 and a rear spring shock absorber 123 arranged side by side, and the rear airbag shock absorber 122 and the rear spring shock absorber 123 are both connected to the vehicle frame 200. It can be understood that the rear airbag shock absorber 122 and the rear spring shock absorber 123 are used in combination to give full play to their respective advantages and maximize the shock absorption effect; in addition, compared with a single shock absorption system, the combined shock absorption system may be easier to maintain because the two shock absorbers can complement each other and reduce the wear and failure rate of a single component. The combined shock absorption assembly is suitable for both passenger cars and commercial vehicles and special vehicles, and has a wide range of applicability.

[0022] It should be noted that the rear spring shock absorber 123 is arranged 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 arranged 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.

[0023] In one embodiment, the two rear upper thrust rods 111 are distributed in a V-shape, and the ends to which the two rear upper thrust rods 111 are connected are close to the middle of the rear axle body 110. It is understandable that the two rear upper thrust rods 111 form a V-shaped structure to more comprehensively prevent the displacement of the rear axle assembly 100. In addition to preventing front and rear displacement, it can also effectively prevent left and right displacement. This is because, during the turning process of the car, the rear axle assembly 100 may shift left and right due to mechanical effects, thereby causing friction between the shock absorber and the tire, and in severe cases may even cause safety accidents such as premature tire wear or tire blowout. The unique structural design of the V-shaped thrust rod enables it to effectively deal with the left and right displacement problem that may occur in the rear axle assembly 100 when the car is turning.

[0024] In one embodiment, the two rear lower thrust rods 112 are horizontally distributed and respectively close to the two beams 121 , mainly to limit the front-rear displacement of the rear axle system.

[0025] In one embodiment, a rear height valve 124 is also provided at the end of the beam 121. It is understandable that the rear airbag shock absorber 122 is equipped with a rear height valve 124, and the air pressure in the airbag can be adjusted as needed, thereby changing the stiffness of the rear spring shock absorber 123 to better adapt to different loads and road conditions.

[0026] In one embodiment, the rear axle assembly 100 further includes a rear lateral stabilizer bar 113 whose two ends are respectively hinged on the two suspension mechanisms 120, and the rear lateral stabilizer bar 113 is connected to the vehicle frame 200. Specifically, the lateral stabilizer bar assembly is composed of a lateral stabilizer bar and a suspension rod, one end of the suspension rod is connected to the suspension rod bracket on the beam 121, and a fixing seat is provided on the lateral stabilizer bar and connected to the rear axle section frame 240. The rear lateral stabilizer bar 113 is shaped like a "U" shape, is arranged transversely, and faces the front end of the vehicle. When the vehicle body rolls, it can generate elastic force by twisting to resist the roll of the vehicle, thereby achieving a lateral stability effect.

[0027] In this embodiment, brakes 114 are disposed at both ends of the rear axle body 110 .

[0028] like Figure 4 As shown, the embodiment of the present 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 steering of the vehicle, the front axle assembly 300 is arranged at the front bottom of the frame 200, and the rear axle assembly 100 is arranged at the rear bottom of the frame 200. The rear axle assembly 100 makes the new energy vehicle chassis improve the driving smoothness of the vehicle and ensure the stability and comfort of the vehicle.

[0029] In one embodiment, Figure 3 As shown, the front axle assembly 300 includes a front beam 310, two mounting seats 320 disposed on the front beam 310, a front composite shock-absorbing assembly disposed on the mounting seats 320, two front upper thrust rods 350 rotatably disposed on the two mounting seats 320, and two front lower thrust rods 360 rotatably disposed on the front beam 310. The front composite shock-absorbing assembly, the front upper thrust rod 350, and the front lower thrust rod 360 are all connected to the vehicle frame 200. It can be understood that the front axle assembly 300 adopts a structure of four thrust rods and dual front composite shock-absorbing assemblies, which can improve the driving smoothness of the vehicle and ensure the stability and comfort of the vehicle.

[0030] Furthermore, the two front lower thrust rods 360 are distributed in a V shape, and the ends of the two front lower thrust rods 360 are both close to the middle of the front beam 310. It can be understood that the two front lower thrust rods 360 form a V-shaped structure to more comprehensively prevent the front axle assembly 300 from shifting, and in addition to preventing front-to-back shifting, it can also effectively prevent left-to-right shifting.

[0031] In this embodiment, the front beam 310 is a bow beam.

[0032] In one embodiment, the front composite shock-absorbing assembly includes a front airbag shock absorber 330 and a front spring shock absorber 340 arranged side by side, and the front airbag shock absorber 330 and the front spring shock absorber 340 are both connected to the vehicle frame 200. It can be understood that the front airbag shock absorber 330 and the front spring shock absorber 340 are used in combination to give full play to their respective advantages and maximize the shock absorption effect; in addition, compared with a single shock absorption system, the combined shock absorption system may be easier to maintain because the two shock absorbers can complement each other and reduce the wear and failure rate of a single component. The combined shock absorption assembly is suitable for both passenger cars and commercial vehicles and special vehicles, and has a wide range of applicability.

[0033] In one embodiment, Figure 2 As shown, the front axle assembly 300 further includes a front lateral stabilizer bar 370 whose two ends are respectively hinged on the front beam 310, and the front lateral stabilizer bar 370 is connected to the vehicle frame 200. Specifically, one end of the front lateral stabilizer bar 370 is connected to the lifting lug on the mounting seat 320 by bolts, and the two ends of the lateral stabilizer bar are symmetrically provided with hanging rods fixedly connected to the vehicle frame 200 by bolts. The front lateral stabilizer bar 370 is shaped like a "U" shape, is arranged transversely, and faces the front end of the vehicle. When the vehicle body rolls, it can generate elastic force by twisting to resist the roll of the vehicle, thereby achieving the effect of lateral stability.

[0034] In one embodiment, a front height valve 380 is further provided on the front beam 310 near the front airbag shock absorber 330. It can be understood that the front airbag shock absorber 330 is equipped with the front height valve 380, and the air pressure in the airbag can be adjusted as needed, thereby changing the stiffness of the front spring shock absorber 340 to better adapt to different loads and road conditions.

[0035] In one embodiment, the frame 200 is welded into a whole by a front suspension section frame 210, a front axle section frame 220, a middle section frame 230, a rear axle section frame 240, and a tail section frame 250. The steering system assembly 400 is installed on the front suspension section frame 210, the front axle assembly 300 is installed on the front axle section frame 220, and the rear axle assembly 100 is installed on the rear axle section frame 240. The middle section frame 230 is a luggage compartment setting area, and the energy storage module is concentratedly arranged at the rear of the middle section frame 230 and the tail section frame 250, thereby increasing the luggage compartment volume in the warehouse.

[0036] In one embodiment, the arrangement of the steering system assembly 400 is a combination of a vertical steering machine and an intermediate rocker arm, and a pure mechanical hydraulic power-assisted driving mode is adopted. Its working principle is that after the driver applies a steering torque to the steering wheel 410, the torque is input to the steering gear 430 through the transmission shaft in the steering column 420, and the torque is amplified by the steering gear 430 and transmitted to the steering knuckle arm through the steering vertical arm 440, the front tie rod 450, and the rear tie rod 470, thereby controlling the driving posture of the whole vehicle. The specific connection mode of the steering system assembly 400 is that 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 vertical arm 440, the front tie rod 450 and the rear tie rod 470 are connected through the transition rocker arm 460, and the rear straight tie rod is connected to the front wheel steering knuckle arm to control the driving state of the whole vehicle. The steering system adopts a combination of a vertical steering machine and an intermediate rocker arm to increase the operating area of ​​the driver area while also improving the reliability of the steering system.

[0037] The drive system is arranged on the rear axle section frame 240 and the tail section frame 250. The drive system is a prior art, and its composition may be: a drive motor, a motor controller, and a transmission shaft device. The drive motor is fixedly connected to the tail section of the frame 200 through a motor suspension mounting assembly, and the output shaft of the drive motor is connected to one end of the transmission shaft device, and the other end of the transmission shaft device is connected to the main reduction flange of the rear axle; in addition, the drive system is also equipped with a car retarder device as an auxiliary braking device, and the retarder device is connected to the rear axle flange by bolts.

[0038] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0039] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A rear axle assembly, characterized in that: include: A rear axle body (110), wherein at least two rear upper thrust rods (111) and at least two rear lower thrust rods (112) distributed vertically are rotatably connected to the rear axle body (110), and the rear upper thrust rods (111) and the rear lower thrust rods (112) are connected to the vehicle frame (200); Two suspension mechanisms (120) are arranged on a rear axle body (110), the suspension mechanisms (120) comprising: a profile beam (121), and two rear composite shock absorbing components respectively arranged at two ends of the profile beam (121), the rear composite shock absorbing components being connected to a vehicle frame (200).

2. The rear axle assembly (100) according to claim 1, characterized in that: The rear composite shock absorbing assembly comprises a rear airbag shock absorber (122) and a rear spring shock absorber (123) which are arranged side by side, and the rear airbag shock absorber (122) and the rear spring shock absorber (123) are both connected to the vehicle frame (200).

3. The rear axle assembly (100) according to claim 1, characterized in that: The two rear upper thrust rods (111) are distributed in a V shape, and one end of the two rear upper thrust rods (111) connected is close to the middle of the rear axle body (110).

4. The rear axle assembly (100) according to claim 1, characterized in that: The two rear lower thrust rods (112) are horizontally distributed and respectively close to the two profile beams (121).

5. The rear axle assembly (100) according to any one of claims 1 to 4, characterized in that: A rear height valve (124) is also provided at the end of the profile beam (121).

6. The rear axle assembly (100) according to any one of claims 1 to 4, characterized in that: It also includes a rear lateral stabilizer bar (113) with two ends respectively hinged on the two suspension mechanisms (120), and the rear lateral stabilizer bar (113) is connected to the vehicle frame (200).

7. A new energy vehicle chassis, characterized in that: The invention comprises a vehicle frame (200), a front axle assembly (300), a steering system assembly (400), and a rear axle assembly (100) according to any one of claims 1 to 6, wherein the steering system assembly (400) is used to control the steering of the vehicle, the front axle assembly (300) is arranged at the front bottom of the vehicle frame (200), and the rear axle assembly (100) is arranged at the rear bottom of the vehicle frame (200).

8. The new energy vehicle chassis according to claim 7, characterized in that: The front axle assembly (300) comprises a front beam (310), two mounting seats (320) arranged on the front beam (310), a front composite shock absorbing assembly arranged on the mounting seats (320), two front upper thrust rods (350) rotatably arranged on the two mounting seats (320), and two front lower thrust rods (360) rotatably arranged on the front beam (310); the front composite shock absorbing assembly, the front upper thrust rods (350), and the front lower thrust rods (360) are all connected to the vehicle frame (200).

9. The new energy vehicle chassis according to claim 8, characterized in that: The front composite shock-absorbing assembly comprises a front airbag shock absorber (330) and a front spring shock absorber (340) which are arranged side by side, and the front airbag shock absorber (330) and the front spring shock absorber (340) are both connected to the vehicle frame (200).

10. The new energy vehicle chassis according to claim 8 or 9, characterized in that: The front axle assembly (300) further comprises a front lateral stabilizer bar (370) with two ends respectively hinged to the front beam (310), and the front lateral stabilizer bar (370) is connected to the vehicle frame (200).

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