CN217892988U

CN217892988U - Axle system and vehicle

Info

Publication number: CN217892988U
Application number: CN202222305533.3U
Authority: CN
Inventors: 杨志强; 王东; 迟达
Original assignee: Tsinghua University; Suzhou Automotive Research Institute of Tsinghua University
Current assignee: Tsinghua University; Suzhou Automotive Research Institute of Tsinghua University
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-25
Anticipated expiration: 2032-08-31

Abstract

The utility model relates to the technical field of automobiles, specifically disclose axle system and vehicle, this axle system includes axle, first wheel module, second wheel module and suspension, first wheel module includes support, steering gear, steering arm, driver and wheel, the one end of support and the one end rigid coupling of axle, the other end of support and the one end of steering arm rotate to be connected, the steering gear drives the relative support rotation of steering arm, the other end and the driver rigid coupling of steering arm, driver drive wheel rotates; the second wheel module has the same structure as the first wheel module and is arranged at the other end of the axle shaft; one end of the suspension is fixedly connected with the axle shaft, and the other end of the suspension is fixedly connected with the frame. The axle system has the advantages that each wheel has an independent steering function, the integral strength of the axle system can be improved, the structure of the axle system is simplified, and the production cost is reduced.

Description

Axle system and vehicle

Technical Field

The utility model relates to the field of automotive technology, especially, relate to axle system and vehicle.

Background

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), and has simple structure and relatively easy control. However, the mechanical linkage between the wheels on the two sides limits the rotating angle range in space, the Ackermann steering principle is difficult to meet accurately when the rotating angle is large, the transmission path is too long, and large energy loss exists. The construction of a single steering motor plus a conventional mechanical steering gear is difficult to achieve when a vehicle with a small steering radius is required.

The current integrated steering and suspension system that appears, its every directive wheel all is provided with one set of mutually independent steering system expert, shock mitigation system and braking system etc. and it has realized the independent steering of every wheel, but it has the problem that the structure is complicated, structural strength is low and manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the axle system and the vehicle are provided to solve the problems that each steering wheel in the related art is provided with a set of steering system, a shock absorption system, a brake system and the like which are mutually independent, and although the independent steering of each wheel is realized, the axle system and the vehicle have complex structures, low structural strength and high production cost.

In one aspect, the utility model provides an axle system, this axle system includes:

a bridge shaft;

the first wheel module comprises a support, a steering gear, a steering arm, a driver and wheels, wherein one end of the support is fixedly connected with one end of the axle shaft, the other end of the support is rotatably connected with one end of the steering arm, the steering gear drives the steering arm to rotate relative to the support, the other end of the steering arm is fixedly connected with the driver, and the driver drives the wheels 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 shaft;

and one end of the suspension is fixedly connected with the axle shaft, and the other end of the suspension is fixedly connected with the frame.

As the preferable technical scheme of the axle system, the suspension is a leaf spring type dependent suspension.

As the preferable technical scheme of the axle system, the steering gear comprises a steering motor and a speed reducer, and the steering motor, the speed reducer and the steering arm are sequentially in transmission connection.

As a preferred technical scheme of the axle system, one end of the bracket is provided with a first through hole, one end of the axle shaft penetrates through the first through hole and is fixedly connected with the bracket, the other end of the bracket is provided with a second through hole, the speed reducer is fixedly arranged at the other end of the bracket, and an output shaft of the speed reducer penetrates through the second through hole and is fixedly connected with the steering arm.

As a preferred technical solution of the axle system, the steering gear further includes an angle sensor for monitoring an angle through which the steering arm is turned.

As a preferred solution to the axle system, the steering arm is rotatable through 360 degrees.

As a preferable technical solution of the axle system, the rotating shaft of the steering arm is located in a median plane of the wheel along the rotating shaft direction thereof and is perpendicular to the rotating shaft of the wheel.

As the preferred technical scheme of the axle system, the driver is a hub motor, the wheel sleeve is arranged on a rotor shell of the hub motor and fixedly connected with the rotor shell, and a stator shaft of the hub motor is fixedly connected with the steering arm.

As a preferred technical solution of the axle system, the first wheel module further includes a brake, the brake includes a brake disc and a caliper, the brake disc is fixedly connected to the rotor shell coaxially, and the caliper is fixedly connected to the steering arm.

In another aspect, the present invention provides a vehicle including an axle system according to any one of the above aspects.

The utility model has the advantages that:

the utility model provides an axle system, this axle system include axle, first wheel module, second wheel module and suspension, and first wheel module includes support, steering gear, steering arm, driver and wheel, and the one end of support and the one end rigid coupling of axle, the other end of support and the one end of steering arm rotate to be connected, and steering gear drive steering arm rotates relative to the support, and the other end and the driver rigid coupling of steering arm, driver drive wheel rotate; the second wheel module has the same structure as the first wheel module and is arranged at the other end of the axle shaft; one end of the suspension is fixedly connected with the axle shaft, and the other end of the suspension is fixedly connected with the frame. The first wheel module and the second wheel module of the axle system are mutually independent, and two wheels are driven to steer through two steering gears respectively, so that small-radius turning is realized. Simultaneously, the both ends of axle respectively with two support rigid couplings of first wheel module and second wheel module, the suspension is with axle and frame connection, and then can promote the holistic intensity of axle system, simplifies the structure of axle system, reduces its manufacturing cost.

Drawings

Fig. 1 is a first schematic structural diagram of an axle system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an axle system according to an embodiment of the present invention;

fig. 3 is a first schematic structural diagram of a first wheel module according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of the first wheel module according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a bracket according to an embodiment of the present invention.

In the figure:

1. a bridge shaft;

2. a first wheel module; 21. a support; 211. a first through hole; 212. a second through hole; 22. a diverter; 221. a steering motor; 222. a speed reducer; 223. an angle sensor; 224. a fixed mount; 23. a steering arm; 24. a driver; 25. a wheel; 26. a brake; 261. a brake disc; 262. a caliper;

3. a second wheel module; 4. and (4) a suspension.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 5, the present embodiment provides an axle system, which includes an axle shaft 1, a first wheel module 2, a second wheel module 3, and a suspension 4, where the first wheel module 2 includes a bracket 21, a steering gear 22, a steering arm 23, a driver 24, and wheels 25, one end of the bracket 21 is fixedly connected to one end of the axle shaft 1, 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 wheels 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 shaft 1; one end of the suspension 4 is fixedly connected with the axle shaft 1, and the other end of the suspension 4 is fixedly connected with the frame. The first wheel module 2 and the second wheel module 3 of the axle system are independent from each other, and two wheels 25 are driven to steer through two steering gears 22 respectively, so that small-radius turning is realized. Meanwhile, two ends of the axle shaft 1 are fixedly connected with two supports 21 of the first wheel module 2 and the second wheel module 3 respectively, and the suspension 4 connects the axle shaft 1 with the vehicle frame, so that the overall strength of the axle system can be improved, the structure of the axle system is simplified, and the production cost of the axle system is reduced.

Alternatively, the suspension 4 is a leaf spring type non-independent suspension. In this embodiment, leaf spring formula non-independent suspension has simple structure, and the cost is low and bearing capacity is strong advantage. In other embodiments, a coil spring type dependent suspension, a torsion beam type coil spring suspension, or the like may be used.

Optionally, the steering gear 22 includes 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. In this embodiment, the output end of the steering motor 221 is in transmission connection with the input end of the speed reducer 222, and the output end of the steering gear 22 is in transmission connection with the steering arm 23, and drives the steering arm 23 to rotate. Specifically, the reducer 222 is a worm gear reducer 222.

Optionally, one end of the bracket 21 is provided with a first through hole 211, one end of the axle shaft 1 penetrates through the first through hole 211 and is fixedly connected with the bracket 21, the other end of the bracket 21 is provided with a second through hole 212, the speed reducer 222 is fixedly arranged at the other end of the bracket 21, and an output shaft of the speed reducer 222 penetrates through the second through hole 212 and is fixedly connected with the steering arm 23. In this embodiment, one end of the axle shaft 1 is fixedly connected to the bracket 21 by welding, and in other embodiments, the axle shaft 1 and the bracket 21 may be fixedly connected by bolts. The other end of the bracket 21 is fixedly connected with the speed reducer 222 through a bolt, and the steering arm 23 is positioned on one side of the other end of the bracket 21 close to the ground, so that the maximum pressure of the bracket 21 on the steering arm 23 can be increased.

Optionally, the steering gear 22 further comprises an angle sensor 223, the angle sensor 223 being adapted to monitor the angle through which the steering arm 23 is turned. In this embodiment, the steering gear 22 further includes a fixing frame 224, one end of the fixing frame 224 is fixedly disposed on the bracket 21, and the other end of the fixing frame 224 is provided with an angle sensor 223, where the angle sensor 223 is used for monitoring a rotation angle of an output shaft of the speed reducer 222.

Alternatively, the steering arm 23 may be rotated 360 degrees. In this embodiment, this setting not only can make the vehicle realize the small angle and turn to, moreover, when the front and back wheel of vehicle all was provided with above-mentioned axle system, can also make vehicle along arbitrary direction rectilinear motion.

Alternatively, the rotation axis of the steering arm 23 is located in the median plane of the wheel 25 in the rotation axis direction thereof and perpendicular to the rotation axis of the wheel 25. In this embodiment, this arrangement can reduce the rolling force to which the tire is subjected.

Optionally, the driver 24 is an in-wheel motor, the wheel 25 is sleeved on and fixedly connected with a rotor shell of the in-wheel motor, and a stator shaft of the in-wheel motor is fixedly connected with the steering arm 23. In this embodiment, the installation space can be saved and the movement interference to the parts such as the steering arm 23 and the bracket 21 can be avoided by arranging the hub motor.

Optionally, the first wheel module 2 further includes a brake 26, the brake 26 includes a brake disc 261 and a caliper 262, the brake disc 261 is coaxially fixed with the rotor shell, and the caliper 262 is fixed with the steering arm 23. In this embodiment, the brake disc 261 is sleeved on the stator shaft of the in-wheel motor, and the brake disc 261 is fixed on the rotor shell through bolts. The caliper 262 is screwed to the steering arm 23, which makes it possible to brake the wheel 25.

The embodiment also provides a vehicle comprising the axle system in the scheme.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An axle system, comprising:

a bridge shaft (1);

the first wheel module (2) comprises a support (21), a steering gear (22), a steering arm (23), a driver (24) and wheels (25), one end of the support (21) is fixedly connected with one end of the axle shaft (1), the other end of the support (21) is rotatably connected with one end of the steering arm (23), the steering gear (22) drives the steering arm (23) to rotate relative to the support (21), the other end of the steering arm (23) is fixedly connected with the driver (24), and the driver (24) drives the wheels (25) to rotate;

the second wheel module (3) is the same as the first wheel module (2) in structure and is arranged at the other end of the axle shaft (1);

one end of the suspension (4) is fixedly connected with the axle shaft (1), and the other end of the suspension (4) is fixedly connected with a vehicle frame.

2. 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 of claim 1, wherein the steering gear (22) comprises a steering motor (221) and a speed reducer (222), and the steering motor (221), the speed reducer (222) and the steering arm (23) are in turn in transmission connection.

4. The axle system of claim 3, wherein a first through hole (211) is formed in one end of the bracket (21), one end of the axle shaft (1) penetrates through the first through hole (211) and is fixedly connected with the bracket (21), a second through hole (212) is formed in the other end of the bracket (21), the speed reducer (222) is fixedly arranged at the other end of the bracket (21), and an output shaft of the speed reducer (222) penetrates through the second through hole (212) and is fixedly connected with the steering arm (23).

5. The axle system of claim 3, wherein the steering gear (22) further comprises an angle sensor (223), the angle sensor (223) being configured to monitor an angle through which the steering arm (23) is turned.

6. The axle system of claim 3, characterized in that the steering arm (23) is rotatable through 360 degrees.

7. Axle system according to any of claims 1-6, characterized in that the axis of rotation of the steering arm (23) is located in the median plane of the wheel (25) in the direction of its axis of rotation and perpendicular to the axis of rotation of the wheel (25).

8. The axle system of any one of claims 1 to 6, wherein the drive (24) is an in-wheel motor, the wheel (25) is sleeved on and fixedly connected with a rotor shell of the in-wheel motor, and a stator shaft of the in-wheel motor is fixedly connected with the steering arm (23).

9. The axle system of claim 8, characterized in that the first wheel module (2) further comprises a brake (26), the brake (26) comprising a brake disc (261) and a caliper (262), the brake disc (261) being affixed coaxially to the rotor housing, the caliper (262) being affixed to the steering arm (23).

10. Vehicle, characterized in that it comprises an axle system according to any one of claims 1 to 9.