Electric automobile chassis system with four-wheel independent steering function and steer-by-wire mechanism thereof

Abstract

The invention relates to an electric automobile chassis system with a four-wheel independent steering function and a steer-by-wire mechanism of the electric automobile chassis system. The steer-by-wire mechanism comprises two steering pull rods, a steering power unit and two transmission units, the steering pull rods are arranged horizontally, the end, close to a wheel, of each steering pull rod is hinged to a steering knuckle of a suspension wheel assembly, and when the plane where wheels are located is perpendicular to the steering pull rods, the two steering pull rods are symmetrical about the vertical radial direction of the wheels; the steering power unit is electrically connected with an electronic control unit of an electric automobile and provided with two levels of power output ends which are the same in speed ratio and opposite in power output direction; the power output ends of the two transmission units are connected with the two levels of power output ends of the steering power unit respectively, and the power output end of each transmission unit is connected with one end, away from the corresponding wheel, of the corresponding steering pull rod to drive the steering pull rod to move back and forth to drive the corresponding wheel to swing. According to the electric automobile chassis system with the four-wheel independent steering function and the steer-by-wire mechanism of the electric automobile chassis system, steering stability of the wheels is good, and the electric automobile chassis system is safe, reliable and good in maneuverability in narrow space.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, in particular to a four-wheel independent steering chassis system of an electric vehicle and a steering-by-wire mechanism thereof. Background technique [0002] In response to the increasingly prominent contradiction between fuel supply and demand and environmental pollution, new energy vehicles, mainly electric vehicles, have become the development direction of the international automobile industry. In recent years, with the development of electric drive technology and wire control technology, high-mobility electric vehicles that integrate hub motors and wire-by-wire steering systems (or called wire-by-wire steering systems, Steering-By-Wire System, referred to as SBW) received great attention. Among them, the steer-by-wire system is developed to meet the easy maneuverability design of the car. It is a new generation of steering system developed after the electric power steering syste...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is that the steering stability of the steering-by-wire device of the existing electric vehicle four-wheel independent steering chassis system is poor, the service life of the transmission structure is short, and it is not conducive to the safe operation of the vehicle. Four-wheel independent steering chassis system and its steer-by-wire mechanism for electric vehicles with good steering stability, safety and reliability, and good maneuverability in a small space

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