Coaxial dual-motor steer-by-wire system and intelligent automobile without steering wheel

Abstract

A coaxial dual-motor steer-by-wire system comprises a power steering motor, a connecting structure of a main motor, an auxiliary motor and a worm and gear speed reducer, the worm and gear speed reducer, a connecting structure of the worm and gear speed reducer and a steering gear, a rack and pinion type steering gear, a steering wheel assembly and a control system. The steer-by-wire system without the steering wheel is adopted, a complex steering mechanical structure is omitted, the number of parts of the steering system is reduced, the overall structure is more compact, and the occupied space is reduced; a dual-motor redundancy control mode is adopted, so that the error-tolerant rate of the whole steer-by-wire system is improved; the problem of steering clearance is fully considered in the assembly of parts, the clearance is eliminated to the maximum extent, and the steering continuity, stability and reliability are ensured; the middle input gear rack type steering gear serves as a steering actuator, the structure is simple and compact, rigidity is large, and steering is sensitive.

Description

technical field [0001] The invention relates to the field of intelligent vehicles, in particular to a coaxial dual-motor wire-controlled steering system, belonging to the technical field of vehicle wire-controlled steering systems, having a coaxial dual-motor structure and capable of realizing manual mechanical steering input. Background technique [0002] The function of the automobile steering system is to ensure that the vehicle has ideal steering stability when turning the steering wheel under any working conditions, so that the car can control the driving direction of the car according to the driver's wishes. In the development process of vehicle steering system, it mainly includes five stages: pure mechanical steering, hydraulic power steering, electro-hydraulic power steering, electro-hydraulic power steering and wire-controlled steering. Until now, steering-by-wire technology has become a research hotspot and development trend in the vehicle steering industry. [00...

AI Technical Summary

Problems solved by technology

[0007] However, the steering system in this scheme is still based on the traditional steering gear and adds a booster device. The booster device is a dual-motor structure with a redundant design. The dual-motor structure is non-coaxial, and the spatial arrangement is relatively complicated. ; The structure is electric power steering, and its steering function is still realized by the traditional driver's manipulation of the steering wheel, not a steering-by-wire system

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