A dual-drive steering mechanism for a drive-by-wire steering system

Abstract

The invention provides a dual drive steering mechanism used for a wire transmission steering system and belongs to the field of structural design of vehicle equipment. The mechanism comprises a two-way steering motor driving mechanism, a worm gear and worm speed reduction mechanism, a sensor unit and a fixing installing mechanism. The two-way steering motor driving mechanism is installed in a box body of the fixing installing mechanism and a worm at the tail end of the two-way steering motor driving mechanism is in matching transmission with a worm gear of the worm gear and worm speed reduction mechanism; the worm gear of the worm gear and worm speed reduction mechanism is connected with a pinion of the fixing installing mechanism in series through a transmission rod and the worm gear and worm speed reduction mechanism is installed in the box body of the fixing installing mechanism through shaft parts; the sensor unit is installed on a box body cover of the fixing installing mechanism; a spline of a transmission rod of the sensor unit is connected with a speed reduction mechanism transmission rod of the worm gear and worm speed reduction mechanism in series. Under normal working conditions, double motors are connected in parallel and coupled to drive the steering mechanism to operate; when one way of the steering motor driving mechanism breaks down, the other way can work continuously, so that the safety and the reliability of the steering operation are guaranteed.

Description

technical field [0001] The invention belongs to the field of structural design of automobile equipment, in particular to a steering mechanism driven by double motors for a drive-by-wire steering system, which provides reliable steering driving force for the drive-by-wire steering system with redundancy. Background technique [0002] Compared with the traditional mechanical steering system, the wire-by-wire steering system cancels the mechanical connection between the steering wheel and the steering gear, and the steering is driven by electrical signals. This change can improve the handling stability, passive safety and ride comfort of the car, making the car have better steering characteristics at high and low speeds. However, compared with the traditional mechanical steering system, the wire-by-wire steering system replaces the mechanical connection with electrical signals, and uses the motor to drive the steering gear to perform steering operations. Since the reliability o...

AI Technical Summary

Problems solved by technology

However, the current dual-drive steering mechanism has the following problems: 1. The structure is complex, the volume is large, and the cost is high; 2. Electronic devices such as solenoid valves are used as components for switching redundancy. Once the solenoid valve fails, it will not be able to operate. Redundancy switching does not actually improve the safety and reliability of the entire system

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