Rear wheel steering, vehicle and its rear wheel steering system
A rear wheel steering and vehicle technology, applied in mechanical steering gear, vehicle components, steering mechanism, etc., can solve the problems of high development cost, large motor torque, and difficult design
Active Publication Date: 2021-03-26
BYD CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
The existing rear wheel steering gear is usually one-stage transmission, the transmission ratio is small, the required motor torque is large, and it has the problems of difficult design and high development cost
Method used
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[0068] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0069] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0070] In this disclosure, unless stated to the contrary, the use of orientation words such as "inner, outer" refers to the "inner, outer" of the corresponding component outline, and "upper, lower" generally corresponds to the "upper, lower" of the vehicle. It should be noted that the above-mentioned orientation nouns are only used to expla...
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The invention relates to a rear wheel steering gear, a rear wheel steering system and vehicle. The rear wheel steering gear comprises a motor, a steering execution mechanism and a transmission mechanism in transmission connection with the motor and the steering execution mechanism. The steering execution mechanism comprises a lead screw nut matching mechanism used for being connected with a rear axle steering knuckle so as to drive a rear wheel to steer. A driving nut of the lead screw nut matching mechanism is rotatably supported in a rear wheel steering gear shell, and the transmission mechanism is in transmission connection with the driving nut of the lead screw nut matching mechanism and used for converting the rotating motion of the motor into the linear motion of a driving lead screwof the lead screw nut matching mechanism in the axial direction through the driving nut. Therefore, the rear axle steering knuckle drives the rear wheel to steer by a corresponding angle relative tothe front wheel so as to improve the problem of insufficient steering or excessive steering, torque can be increased through cooperation of the transmission mechanism and the lead screw nut matching mechanism, the requirement for rated torque of the motor is lowered, the overall structure of the rear wheel steering gear is reasonable, and design difficulty is lowered.
Description
technical field [0001] The present disclosure relates to the technical field of vehicle steering systems, and in particular, to a rear wheel steering device, a rear wheel steering system and a vehicle. Background technique [0002] With the development of modern automobile technology and the improvement of road conditions, the requirements for the comfort, handling and safety of automobiles are getting higher and higher. Sex, etc., the rear wheel follow-up steering technology has been added to the vehicle steering technology. That is, through the rear wheel steering technology, when the vehicle is at low speed or understeer occurs, the rear wheels and the front wheels rotate in opposite phases, so as to achieve the purpose of reducing the turning radius and improving the flexibility of the vehicle. When the vehicle tends to oversteer, especially at high speeds, the rear wheels and front wheels rotate in the same phase to reduce the side slip angle of the vehicle's center of...
Claims
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IPC IPC(8): B62D5/04B62D3/06
CPCB62D3/06B62D5/0421B62D5/0445
Inventor 董大伟蔡昭华刘先华
Owner BYD CO LTD