Axle system and vehicle

Abstract

The present invention relates to the field of automotive technology, specifically disclosing an axle system and a vehicle. The axle system includes an axle shaft, a first wheel module, a second wheel module, and a suspension. The first wheel module includes a bracket, a steering gear, a steering arm, a driver, and a wheel. One end of the bracket is fixedly connected to one end of the axle shaft, and the other end of the bracket is rotatably connected to one end of the steering arm. The steering gear drives the steering arm to rotate relative to the bracket. The other end of the steering arm is fixedly connected to the driver, and the driver drives the wheel to rotate. The second wheel module has the same structure as the first wheel module and is disposed at the other end of the axle shaft. One end of the suspension is fixedly connected to the axle shaft, and the other end of the suspension is used to be fixedly connected to the vehicle frame. This axle system allows each wheel to have independent steering function while improving the overall strength of the axle system, simplifying the structure of the axle system, and reducing its production cost.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to an axle system and a vehicle. Background Art

[0002] The commonly used steer-by-wire system consists of a steering motor and a traditional mechanical steering gear (such as a rack-and-pinion structure). Its structure is simple and relatively easy to control. However, the mechanical linkage between the two wheels limits the range of rotation angles. Furthermore, it is difficult to accurately meet the Ackermann steering principle at large turning angles. Furthermore, the transmission path is too long, resulting in significant energy loss. When a vehicle requires a small turning radius, a single steering motor and a traditional mechanical steering gear are difficult to implement.

[0003] Currently, an integrated steering and suspension system has emerged, in which each steering wheel is provided with a set of independent steering systems, shock absorption systems and braking systems. Although it realizes the individual steering of each wheel, it has problems such as complex structure, low structural strength and high production cost. Summary of the Invention

[0004] The purpose of the present invention is to provide an axle system and a vehicle to solve the problem in the related art that each steering wheel is provided with a set of independent steering systems, shock absorption systems and braking systems, etc. Although it realizes the individual steering of each wheel, it has the problems of complex structure, low structural strength and high production cost.

[0005] In one aspect, the present invention provides an axle system comprising:

[0006] bridge axle;

[0007] A first wheel module includes a bracket, a steering gear, a steering arm, a driver, and a wheel, wherein one end of the bracket is fixedly connected to one end of the bridge shaft, the other end of the bracket is rotatably connected to one end of the steering arm, the steering gear drives the steering arm to rotate relative to the bracket, the other end of the steering arm is fixedly connected to the driver, and the driver drives the wheel to rotate;

[0008] a second wheel module, the second wheel module having the same structure as the first wheel module and being disposed at the other end of the axle;

[0009] A suspension, one end of the suspension is fixedly connected to the bridge shaft, and the other end of the suspension is used to be fixedly connected to the vehicle frame.

[0010] As a preferred technical solution for the axle system, the suspension is a leaf spring type non-independent suspension.

[0011] As a preferred technical solution for the vehicle axle system, the steering gear includes a steering motor and a reducer, and the steering motor, the reducer and the steering arm are sequentially connected in transmission.

[0012] As an optimal technical solution for the vehicle axle system, a first through hole is provided at one end of the bracket, one end of the bridge shaft is passed through the first through hole and is fixedly connected to the bracket, a second through hole is provided at the other end of the bracket, the reducer is fixed at the other end of the bracket, and the output shaft of the reducer passes through the second through hole and is fixedly connected to the steering arm.

[0013] As a preferred technical solution of the axle system, the steering gear further includes an angle sensor, and the angle sensor is used to monitor the angle of rotation of the steering arm.

[0014] As a preferred technical solution of the axle system, the steering arm can rotate 360 degrees.

[0015] As a preferred technical solution of the axle system, the rotation axis of the steering arm is located in the median plane of the wheel along the rotation axis direction and is perpendicular to the rotation axis of the wheel.

[0016] As a preferred technical solution for the axle system, the driver is a hub motor, the wheel is sleeved on and fixedly connected to the rotor shell of the hub motor, and the stator shaft of the hub motor is fixedly connected to the steering arm.

[0017] As a preferred technical solution for the axle system, the first wheel module further includes a brake, which includes a brake disc and a caliper. The brake disc is coaxially fixed to the rotor housing, and the caliper is fixed to the steering arm.

[0018] In another aspect, the present invention provides a vehicle comprising the axle system according to any one of the above schemes.

[0019] The beneficial effects of the present invention are:

[0020] The present invention provides a vehicle bridge system, which includes an axle, a first wheel module, a second wheel module and a suspension. The first wheel module includes a bracket, a steering gear, a steering arm, a driver and a wheel. One end of the bracket is fixedly connected to one end of the axle, and the other end of the bracket is rotatably connected to one end of the steering arm. The steering gear drives the steering arm to rotate relative to the bracket, and the other end of the steering arm is fixedly connected to the driver, and the driver drives the wheel to rotate. The second wheel module has the same structure as the first wheel module and is arranged at the other end of the axle. One end of the suspension is fixedly connected to the axle, and the other end of the suspension is used to be fixedly connected to the frame. The first wheel module and the second wheel module of the axle system are independent of each other, and the two wheels are driven and steered by two steering gears respectively, thereby achieving a small radius turn. At the same time, the two ends of the axle are fixedly connected to the two brackets of the first wheel module and the second wheel module respectively, and the suspension connects the axle and the frame, thereby improving the overall strength of the axle system, simplifying the structure of the axle system and reducing its production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the axle system in the embodiment of the present invention is shown as follows Figure 1 ;

[0022] Figure 2 The structure of the axle system in the embodiment of the present invention is shown as follows Figure 2 ;

[0023] Figure 3 The structure of the first wheel module in the embodiment of the present invention is shown as follows: Figure 1 ;

[0024] Figure 4 The structure of the first wheel module in the embodiment of the present invention is shown as follows: Figure 2 ;

[0025] Figure 5 Schematic diagram of the structure of the bracket in an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Bridge axle;

[0028] 2. First wheel module; 21. Bracket; 211. First through hole; 212. Second through hole; 22. Steering gear; 221. Steering motor; 222. Reducer; 223. Angle sensor; 224. Fixing bracket; 23. Steering arm; 24. Driver; 25. Wheel; 26. Brake; 261. Brake disc; 262. Caliper;

[0029] 3. Second wheel module; 4. Suspension. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] like Figures 1 to 5As shown, this embodiment provides a vehicle bridge system, which includes an axle 1, a first wheel module 2, a second wheel module 3, and a suspension 4. The first wheel module 2 includes a bracket 21, a steering gear 22, a steering arm 23, a driver 24, and a wheel 25. One end of the bracket 21 is fixedly connected to one end of the axle 1, and the other end of the bracket 21 is rotatably connected to one end of the steering arm 23. The steering gear 22 drives the steering arm 23 to rotate relative to the bracket 21. The other end of the steering arm 23 is fixedly connected to the driver 24, and the driver 24 drives the wheel 25 to rotate. The second wheel module 3 has the same structure as the first wheel module 2 and is arranged at the other end of the axle 1. One end of the suspension 4 is fixedly connected to the axle 1, and the other end of the suspension 4 is used to be fixed to the vehicle frame. The first wheel module 2 and the second wheel module 3 of the axle system are independent of each other. The two wheels 25 are driven and steered by two steering gears 22 respectively, thereby achieving a small radius turn. At the same time, the two ends of the bridge shaft 1 are fixedly connected to the two brackets 21 of the first wheel module 2 and the second wheel module 3 respectively, and the suspension 4 connects the bridge shaft 1 and the frame, thereby improving the overall strength of the bridge system, simplifying the structure of the bridge system, and reducing its production cost.

[0035] Optionally, the suspension 4 is a leaf spring dependent suspension. In this embodiment, the leaf spring dependent suspension has the advantages of simple structure, low cost, and high load-bearing capacity. In other embodiments, a coil spring dependent suspension or a torsion beam coil spring suspension may also be used.

[0036] Optionally, the steering gear 22 includes a steering motor 221 and a reducer 222. The steering motor 221, the reducer 222, and the steering arm 23 are sequentially connected in a transmission manner. In this embodiment, the output end of the steering motor 221 is transmission-connected to the input end of the reducer 222. The output end of the steering gear 22 is transmission-connected to the steering arm 23, thereby driving the steering arm 23 to rotate. Specifically, the reducer 222 is a worm gear reducer 222.

[0037] Optionally, a first through hole 211 is provided at one end of the bracket 21, one end of the axle 1 is passed through the first through hole 211 and is fixedly connected to the bracket 21, a second through hole 212 is provided at the other end of the bracket 21, a reducer 222 is fixedly provided at the other end of the bracket 21, and the output shaft of the reducer 222 passes through the second through hole 212 and is fixedly connected to the steering arm 23. In this embodiment, one end of the axle 1 is fixedly connected to the bracket 21 by welding. In other embodiments, the axle 1 and the bracket 21 can also be fixed by bolts. The other end of the bracket 21 is fixedly connected to the reducer 222 by bolts, and the steering arm 23 is located on the side of the other end of the bracket 21 close to the ground, thereby increasing the maximum pressure exerted by the bracket 21 on the steering arm 23.

[0038] Optionally, the steering gear 22 further includes an angle sensor 223 for monitoring the rotation angle of the steering arm 23. In this embodiment, the steering gear 22 further includes a fixing bracket 224, one end of which is fixed to the bracket 21, and the other end of which is provided with an angle sensor 223 for monitoring the rotation angle of the output shaft of the reducer 222.

[0039] Optionally, the steering arm 23 can rotate 360 degrees. In this embodiment, this arrangement not only allows the vehicle to achieve small-angle steering, but also, when the front and rear wheels of the vehicle are both provided with the above-mentioned axle system, the vehicle can also be moved linearly in any direction.

[0040] Optionally, the rotation axis of the steering arm 23 is located in the median plane of the wheel 25 along the rotation axis direction thereof and is perpendicular to the rotation axis of the wheel 25. In this embodiment, this arrangement can reduce the roll force on the tire.

[0041] Optionally, the driver 24 is a hub motor, the wheel 25 is mounted on and fixedly connected to the rotor shell of the hub motor, and the stator shaft of the hub motor is fixedly connected to the steering arm 23. In this embodiment, the hub motor can save installation space and will not cause motion interference with components such as the steering arm 23 and the bracket 21.

[0042] Optionally, the first wheel module 2 further includes a brake 26, comprising a brake disc 261 and a caliper 262. The brake disc 261 is coaxially fixed to the rotor housing, while the caliper 262 is fixed to the steering arm 23. In this embodiment, the brake disc 261 is sleeved onto the stator shaft of the in-wheel motor and bolted to the rotor housing. The caliper 262 is threadedly connected to the steering arm 23. This arrangement enables braking of the wheel 25.

[0043] This embodiment also provides a vehicle, comprising the axle system in the above solution.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Axle system, characterized in that, include: Bridge shaft (1); A first wheel module (2) comprises a bracket (21), a steering gear (22), a steering arm (23), a driver (24) and a wheel (25), one end of the bracket (21) being fixedly connected to one end of the bridge shaft (1), the other end of the bracket (21) being rotatably connected to one end of the steering arm (23), the steering gear (22) driving the steering arm (23) to rotate relative to the bracket (21), the other end of the steering arm (23) being fixedly connected to the driver (24), and the driver (24) driving the wheel (25) to rotate; a second wheel module (3), the second wheel module (3) having the same structure as the first wheel module (2) and being arranged at the other end of the bridge shaft (1); A suspension (4), one end of the suspension (4) is fixedly connected to the bridge shaft (1), and the other end of the suspension (4) is used to be fixedly connected to the vehicle frame; The rotation axis of the steering arm (23) is located in the median plane of the wheel (25) along the rotation axis direction thereof and is perpendicular to the rotation axis of the wheel (25); The first wheel module (2) and the second wheel module (3) are independent of each other, and the two wheels (25) are driven and steered by the two steering gears (22) respectively.

2. The axle system according to claim 1, characterized in that The suspension (4) is a leaf spring type non-independent suspension (4).

3. The axle system according to claim 1, wherein: The steering gear (22) comprises a steering motor (221) and a reducer (222), and the steering motor (221), the reducer (222) and the steering arm (23) are sequentially connected in a transmission manner.

4. The axle system according to claim 3, characterized in that One end of the bracket (21) is provided with a first through hole (211), one end of the bridge shaft (1) is passed through the first through hole (211) and is fixedly connected to the bracket (21), the other end of the bracket (21) is provided with a second through hole (212), the reducer (222) is fixedly provided at the other end of the bracket (21), and the output shaft of the reducer (222) passes through the second through hole (212) and is fixedly connected to the steering arm (23).

5. The axle system according to claim 3, characterized in that: The steering gear (22) further comprises an angle sensor (223), and the angle sensor (223) is used to monitor the angle through which the steering arm (23) rotates.

6. The axle system according to claim 3, characterized in that The steering arm (23) can rotate 360 degrees.

7. The axle system according to any one of claims 1 to 6, characterized in that: The driver (24) is a hub motor, the wheel (25) is sleeved on a rotor shell of the hub motor and fixedly connected to the rotor shell, and the stator shaft of the hub motor is fixedly connected to the steering arm (23).

8. The axle system according to claim 7, characterized in that The first wheel module (2) further includes a brake (26), the brake (26) including a brake disc (261) and a caliper (262), the brake disc (261) being coaxially fixed to the rotor housing, and the caliper (262) being fixed to the steering arm (23).

9. A vehicle, characterized in that The axle system comprises the axle system according to any one of claims 1 to 8.

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