Power-assisted steering automatic centering device for vehicle

Abstract

The invention provides a vehicle power-assisted steering automatic centering device which comprises a steering cavity, a piston, a piston rod, a centering cavity and a ball joint, and one end of the piston rod is in threaded connection with the ball joint; a groove is formed in the piston rod, a shaft steel cable baffle ring is installed in the groove, and the piston rod and the two floating pistons are connected through the shaft steel cable baffle ring to form a kinematic pair. The steering cavity and the centering cavity are connected with the middle end cover through clearance fit; the centering cavity is fixedly provided with a guide sleeve through a steel wire baffle ring and a circlip for a shaft; a shaft seal is mounted between the guide sleeve and the piston rod; shaft guide rings are arranged between the piston rod and the two floating pistons and between the piston rod and the middle end cover, first hole guide rings are arranged between the two floating pistons and the middle cavity, and second hole guide rings are arranged between the pistons and the steering cavity. According to the device, the integrated design of power-assisted steering and automatic centering is achieved, the space is greatly saved, the weight is remarkably reduced, the structure is easy to achieve, and the device is suitable for batch 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. The operating conditions of vehicles are complex, especially heavy-duty vehicles, which have large loads, long body lengths, large number of axles, large turning radius, and poor handling stability. At present, rear wheel steering is an effective way to solve these problems. [0003] Generally, a centering device is provided on the rear wheel steering axle of medium and heavy commercial vehicles or special vehicles, and this device is used to ensure that the wheels of the rear steering axle are relatively stable in the middle position (straight-line walking position). At pr...

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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