Electric power steering system for medium and large commercial vehicles

Abstract

The invention discloses an electric power steering system for medium and large commercial vehicles, which comprises a telescopic electric power steering device, the telescopic electric power steering device comprises a steering mechanism assembly and an output mechanism assembly, and the output mechanism assembly comprises a power motor and a ball screw mechanism. The steering mechanism assembly comprises a steering gear and a steering worm which are meshed with each other, the output mechanism assembly further comprises a power-assisted gear and a power-assisted worm which are meshed with each other, the power-assisted worm is connected with the power-assisted motor, the power-assisted gear is connected with the steering worm and the ball screw mechanism, the steering gear is a worm gear or a bevel gear, and the power-assisted worm is connected with the power-assisted motor. The booster gear is a worm gear or a bevel gear. According to the electric power steering system for the medium and large commercial vehicles, the action noise is low during steering, the steering wheel is smooth and free of impact action sound during reversing, the driving experience is good, and the comfort level is high.

Description

technical field [0001] The invention belongs to the technical field of vehicle steering systems, in particular, the invention relates to an electric power steering system for medium and large commercial vehicles. Background technique [0002] The pure electric power steering system is the development direction of the steering system of medium and large commercial vehicles. At the same time, medium and large commercial vehicles, especially medium and large commercial vehicles with new energy (such as pure electric or hydrogen energy), have a very high demand for low noise of the steering system. . [0003] The electric power steering system of medium and large commercial vehicles has low steering noise, good driving and steering operation experience, and high comfort. It can be applied to medium and large passenger cars, trucks, and special vehicles, especially for pure electric medium and large passenger cars, trucks, and special vehicles. [0004] The electric power steer...

AI Technical Summary

Problems solved by technology

[0005] The steering systems of existing medium and large commercial vehicles are basically hydraulic circulating ball power steering systems or electrohydraulic circulating ball power steering systems. These two steering systems have the problem of high operating noise, especially in the application of pure electric medium and large commercial vehicles. The road layout and installation are difficult, and the later maintenance cost is high, because the need to use hydraulic oil will cause certain environmental pollution

In addition, these two hydraulic steering systems cannot fully meet the steering function requirements of assisted driving or intelligent driving

Images