CN210734278U

CN210734278U - Steering structure for steer-by-wire vehicle

Info

Publication number: CN210734278U
Application number: CN201921918091.1U
Authority: CN
Inventors: 靳立强; 任思佳; 张志阳; 张骁; 牟希东; 靳博豪; 郭垠锴; 刘志伟; 屈信益; 郭德胜; 尹长杰; 王德海; 陆新志; 张飞
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-06-12
Anticipated expiration: 2029-11-08

Abstract

The utility model discloses a turn to structure for on steer-by-wire vehicle, include: the two ends of the steering knuckle extend towards one side of the steering knuckle to form a first extending part and a second extending part respectively; the motor base is fixedly arranged on the first extending part, and a groove is formed in the motor base; the steering bearing is arranged in the groove, the outer ring of the steering bearing is in interference fit with the groove, and the inner ring of the steering bearing is abutted against the first extension part; wherein the steering bearing is a tapered roller bearing; the power output end of the steering motor sequentially penetrates through the bearing inner ring and the first extension part and then is fixedly connected with the first extension part; and the lower cross arm is fixedly arranged on one side of the motor base. The structure has the advantages of no need of traditional mechanical structures such as a universal joint transmission shaft and the like, and small occupied space.

Description

Steering structure for steer-by-wire vehicle

Technical Field

The utility model relates to a turn to structure for on steer-by-wire vehicle belongs to car steer-by-wire field.

Background

The Wire-controlled steering, namely 'ser-By-Wire', belongs to one of the Wire-controlled technologies 'X-By-Wire'. steer-By-Wire was originally derived from aerospace technology and from "Fly-By-Wire" for aviation driving, and subsequently, with the development of electronic technology and control technology, more and more people began to study the application of steer-By-Wire in the automotive field.

As early as the 60's of the 20 th century, Kasselmann, germany, attempted to replace mechanical steering systems with electronic control systems, but limited by the state of the art that has not been successful. In 1990, the german gallop company started the research of steer-by-wire and introduced an F400Carving concept car based on the research of steer-by-wire. In 2000, BMW introduced a Z22 concept vehicle, and the steering angle of the steering wheel was reduced by an appropriate control strategy, thereby reducing the operation difficulty of the driver. In 2010, Toyota corporation introduced a FT-EV II concept vehicle, and the functions of accelerating and braking the vehicle were realized through knobs and keys. In 2015, inflixianidi introduced the first global mass-produced vehicle model Q50 to which steer-by-wire was applied.

Steer-by-wire was originally derived from aerospace technology, and in recent years, people with more and more breakthroughs in electronic control technology began to research and obtain a series of achievements on the application of steer-by-wire on automobiles.

The steer-by-wire technology adopts signals to control the automobile to steer, the steering wheel and the steering wheel are connected through electronic signals, traditional mechanical structures such as universal joints and transmission shafts are not needed, and analysis of intention of a driver and feedback of road feel can be easily realized through acquisition of corresponding sensor data and control of a steering motor and a road feel motor. Compare with traditional mechanical structure and turn to more lightly nimble, the reaction is more swift, and required space is littleer, has improved the collision security of vehicle, can turn to the requirement of feeling and feedback road feel to the difference through changing different drivers of gear ratio adaptation, for the driver brings more comfortable driving experience to experience

SUMMERY OF THE UTILITY MODEL

The utility model relates to a developed a turn to structure for on steer-by-wire vehicle, can directly drive knuckle and wheel rotation through the steering motor when the auto steering, it is nimble to rotate, and steering angle is big.

The utility model provides a technical scheme does:

a steering structure for use on a steer-by-wire vehicle, comprising:

the two ends of the steering knuckle form a first extending part and a second extending part outwards respectively;

the motor base is arranged on the first extension part, and a groove is formed in the bottom of the motor base;

the steering bearing is arranged in the groove, the outer ring of the steering bearing is in interference fit with the groove, and the inner ring of the steering bearing is abutted against the first extension part;

wherein the steering bearing is a tapered roller bearing;

the power output end of the steering motor sequentially penetrates through the bearing inner ring and the first extension part and then is fixedly connected with the first extension part;

and the lower cross arm is fixedly arranged on one side of the motor base.

Preferably, the other side of the steering knuckle is fixedly connected with a hub motor.

Preferably, the method further comprises the following steps: and the reduction gearbox is connected with the power output end of the steering motor.

Preferably, the output end of the reduction gearbox is provided with a spline, the first extension part is provided with a key groove in a matching manner, and the spline is arranged at the key groove in a matching manner.

Preferably, the lower cross arm is fixedly connected with the motor base through a ball pin.

Preferably, an upper cross arm is fixedly connected to the second extension part.

Preferably, a spring shock absorber is arranged on the lower cross arm.

Beneficial effect: the utility model relates to a turn to structure for on steer-by-wire vehicle has and need not traditional mechanical structure such as universal joint, transmission shaft, and shared space is little, advantages such as reaction sensitivity, the utility model provides a structure compares with traditional structure and has reduced mechanical structure such as semi-axis on traditional vehicle and can realize turning to at the biggest 90 degrees of wheel, provides the structure basis for functions such as vehicle violently goes.

The steering motor base and the lower cross arm are connected through the two ball pins, so that the tightness among all parts can be increased, the operation stability of the vehicle is improved, and the running safety of the vehicle is improved.

Drawings

Fig. 1 is a schematic structural diagram of a steering structure for a steer-by-wire vehicle according to the present invention.

Fig. 2 is a schematic structural view of the joint of the motor base and the knuckle of the present invention.

Fig. 3 is a schematic structural view of the joint between the motor base and the lower cross arm of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

As shown in fig. 1-3, the present invention provides a steering structure for steer-by-wire vehicles, comprising: the steering knuckle comprises a steering knuckle 100, a steering motor base 200, a hub motor 300, a reduction gearbox 400, a steering motor 500, an upper cross arm 600, a spring shock absorber 700 and a lower cross arm 800.

As shown in fig. 1, two ends of a steering knuckle 100 extend to one side of the steering knuckle 100 to form a first extension portion 110 and a second extension portion 120 respectively, the other side of the steering knuckle 100 is fixedly connected with a hub motor 300 and a brake caliper 310, a steering motor base 200 is arranged on the first extension portion 110, a power output end of a steering motor 500 is connected with a reduction gearbox 400, the reduction gearbox 400 is fixedly arranged on the steering motor base 200, an upper cross arm 800 is fixedly connected to the second extension portion 120, a lower cross arm 800 is fixedly connected to one side of the motor base 200, and a spring damper 700 is arranged on the lower cross arm.

As shown in fig. 3, the upper cross arm 600 is fixedly connected to the second extending portion by an upper ball stud, the lower cross arm 800 is fixedly connected to one side of the steering motor base 200 by two lower ball studs 510, and the motor base 20 and the lower cross arm 800 are connected by two lower ball studs 510, so that the tightness between the components can be increased, the handling stability of the vehicle can be increased, and the safety of the vehicle during driving can be improved.

The hub motor 300 is fixedly connected with the brake disc, the hub motor 300 is fixedly connected with the wheel, a motor shaft of the hub motor penetrates through the knuckle 100 and then is fixedly connected with the knuckle 100, the hub motor 300 is fixedly connected with the knuckle 100 through a spline, and the tail end of the motor shaft of the hub motor 300 is axially fixed through a compression nut after penetrating through the knuckle 100. The brake caliper 310 is fixedly connected to the knuckle 100 by a bolt.

The steering motor 500 is fixedly connected with the reduction gearbox 400, the reduction gearbox 400 is fixedly connected with the steering motor base 200, a first through hole and a second through hole which are coaxially arranged are respectively formed in the first extending part 110 of the steering motor base 200 and the steering knuckle 100 and used for enabling an output shaft 410 of the reduction gearbox 400 to penetrate through, a groove 210 is formed in the first through hole, and a bearing 220 is arranged inside the groove 210.

In the present invention, as a preferable option, the bearing 220 and the groove 210 are in interference fit.

In the present invention, as an option, the bearing 220 is a tapered roller bearing.

The outer ring 221 of the bearing 220 is in interference fit with the groove 210 in the first through hole, and the inner ring 222 of the bearing 220 tightly abuts against the top end face of the first extension 110 of the knuckle 100, so that the steering motor base 200 and the knuckle 100 can rotate relatively. The output shaft of the reduction gearbox 400 passes through the bearing inner ring 222 and the second through hole in sequence and then is fixedly connected with the steering knuckle.

A key groove 411 is provided at the end of the output shaft 410 of the reduction gear box 400, a spline is provided on the first extension 110, the rotational degree of freedom between the output shaft 410 and the knuckle 100 is limited by the spline, and the axial degree of freedom is limited by the end compression nut 420. When a driver rotates a steering wheel, the steering motor 500 receives a signal transmitted by the steering wheel angle sensor, then the steering shaft starts to rotate, the output shaft 411 of the reduction gearbox 400 is driven to rotate, and because the bearing 220 is arranged between the output shaft 411 and the steering motor base 200, and the output shaft 411 is in key connection with the first extension part 110 of the steering knuckle, the rotation of the output shaft 411 of the reduction gearbox 400 can drive the steering knuckle 100 to rotate, so that tires are driven to rotate by corresponding angles, and the purpose of steer by wire is achieved.

As the mechanical structures such as half shafts and the like on the traditional vehicle are eliminated, the wheel turning angle of the structure can reach 90 degrees to the maximum extent, and the mechanical structure foundation is provided for some special steering modes of the vehicle such as transverse running and the like.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. A steering structure for use on a steer-by-wire vehicle, comprising:

wherein the steering bearing is a tapered roller bearing;

and the lower cross arm is fixedly arranged on one side of the motor base.

2. The steering structure for a steer-by-wire vehicle according to claim 1, wherein a hub motor is fixedly connected to the other side of the knuckle.

3. The steering structure for a steer-by-wire vehicle according to claim 2, further comprising: and the reduction gearbox is connected with the power output end of the steering motor.

4. The steering structure for a steer-by-wire vehicle of claim 3, wherein the output end of the reduction gearbox is provided with a key slot, and the first extension part is provided with a spline in a matching way for fixedly connecting the reduction gearbox and the first extension part.

5. The steering structure for a steer-by-wire vehicle according to claim 4, wherein said lower cross arm is fixedly connected to said motor mount by a ball stud.

6. The steering structure for a steer-by-wire vehicle according to claim 5, wherein an upper cross arm is fixedly attached to said second extension.

7. The steering structure for a steer-by-wire vehicle according to claim 6, wherein a spring damper is provided on said lower cross arm.