Integral active electric power-assisted steering mechanical structure

A technology of electric power steering and mechanical structure, applied in the field of steering and steering, can solve the problems of affecting the driving stability, reducing the steering stroke, and the steering flexibility of the car has not been greatly improved, so as to ensure the road response, reduce the turning radius, Comfortable and responsive to the road

CN101973311AInactive Publication Date: 2011-02-16ZHUZHOU ELITE ELECTRO MECHANICAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-02-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an integral active electric power-assisted steering mechanical structure. The structure comprises an electric power-assisted steering system, a steering system gear ratio system and a back wheel steering system, wherein the electric power-assisted steering system and the steering system gear ratio system are realized by a steering system variable-gear ratio electric power-assisted steering system; the back wheel steering system is a special device system for supplying steering force to a back wheel; the steering system variable-gear ratio electric power-assisted steering system is realized by an electronically-controlled harmonic gear transmission between a steering wheel and a lower transmission shaft; and the back wheel steering system consists of a support shaft ring, an outer shell, a motor stator coil, a permanent magnet rotor, a motor angle sensor, a central hollow shaft, a recirculating ball retarding mechanism, a lock sleeve and a rack shaft. In a steering process, an adjusting motor and a power assisting motor are controlled flexibly and compensate for each other, so that steering sensitivity, portability and operation stability are combined perfectly and operation performance and safety performance are enhanced.
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Description

technical field

[0001] The invention relates to steering, in particular to an integral active electric power steering mechanical structure applied to automobile four-wheel steering. Background technique

[0002] The existing electric power steering system is developed from the original traditional mechanical steering system. The angular transmission ratio of the traditional mechanical steering system is fixed. At present, the electric power steering system cannot change the angular transmission ratio of the steering system, but can only The steering torque is reduced, so the driver's labor intensity cannot be reduced by reducing the steering stroke (steering angle) when parking in place at low speeds, and the requirements for stable steering (low sensitivity) cannot be met at high speeds.

[0003] In other words, the steering angle ratio of the steering wheel to the front wheels is always the same whether you are slowing down the narrow streets of the city or running on the ...

Examples

Embodiment 1

[0036] In embodiment one: the car is in the low-speed driving state:

[0037] The steering control module 14 in the controller 6 drives the front-wheel steering system and the rear-wheel steering system 21 to steer in reverse phase. Since the steering gear ratio module 15 provides a small steering transmission ratio at low speeds, the steering torque increases. The steering control module 6 must apply steering torque compensation to the power assist motor 11, so as to obtain excellent handling performance—lightweight, direct steering, and can reduce the steering radius to make the vehicle more flexible and agile.

[0038] In the second embodiment: the car is in the state of changing lanes at high speed, and performs cornering operation:

[0039] The controller 6 steering control module 14 front wheel steering system, the steering angle transmission ratio module 15 provides a large steering transmission ratio and slow steering, and then the controller 6 steering control module ...