A vehicle steering assist automatic centering device

Abstract

The invention provides a steering assist automatic centering device for a vehicle, which includes a steering cavity, a piston, a piston rod, a centering cavity and a ball joint. One end of the piston rod is connected with the ball joint by threads; There is a groove, and the steel wire retaining ring for the shaft is installed in the groove, and the wire retaining ring for the shaft associates the piston rod with the two floating pistons to form a kinematic pair; the steering cavity and the centering cavity are connected with the middle end cover through clearance fit; The middle cavity is fixed with a guide sleeve through a steel wire retaining ring and a shaft elastic retaining ring; a shaft seal is installed between the guide sleeve and the piston rod; a shaft guide ring is installed between the piston rod and the two floating pistons and the middle end cover. The first guide ring for holes is arranged between the two floating pistons and the intermediate cavity, and the second guide ring for holes is arranged between the pistons and the steering cavity. The device realizes the integrated design of power steering and automatic centering, greatly saves space, significantly reduces weight, and has an easy-to-implement structure, which is suitable for mass production and application.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and in particular relates to a steering assist automatic centering device for vehicles. Background technique [0002] With the rapid development of my country's economic construction, transportation has become the artery of the sustainable development of the national economy. Vehicles are an integral part of transportation. Vehicles have complex operating conditions, especially heavy-duty vehicles, with large loads, long body length, large number of axles, large vehicle turning radius, and poor handling stability. At present, rear-wheel steering is an effective way to solve these problems. [0003] Usually, a centering device is provided on the rear wheel steering axle of medium and heavy commercial vehicles or special vehicles, which is used to ensure that the wheels of the rear steering axle are relatively stable in the middle position (straight line position). At present, there are mainly 4...

AI Technical Summary

Problems solved by technology

This method is inaccurate in centering, weak in anti-interference ability, and prone to swing when driving at high speed, so it is necessary to add a locking device

(3) Two cylinders with one-way limit function are installed on the rear wheel steering bridge. The disadvantage of this structure is that the volume of the cylinder is large and takes up a lot of space, and an air pressure control device needs to be added separately

[0004] The centering and steering functions mentioned above are generally designed separately, which takes up a lot of space and costs high

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