Hydraulic centering cylinder with mechanical lockup function

Abstract

The invention relates to a hydraulic centering cylinder with a mechanical lockup function and belongs to the field of automobile steering systems. The hydraulic centering cylinder comprises an oil cylinder body, a piston rod, a left oil cylinder end cover, a right oil cylinder end cover, a left floating piston, a right floating piston, a spring, lockup pistons and nuts. The installation method of the hydraulic centering cylinder includes that the spring is strung in axis through holes of the two lockup pistons which are vertically and symmetrically arranged, then the integrated spring and lockup pistons are placed in a groove of an annular boss of the piston rod, and finally, two ends of the spring are tensioned by the nuts to finish assembling. By means of extension and retraction of the two lockup pistons, integration and separation of the piston rod and a cylinder body through relative movement are achieved, and accordingly, mechanical lockup and unlocking of the piston rod during movement are achieved. By means of mechanical lockup, slight moving of the piston rod under large impacting is prevented, and simultaneously, safety guarantee is provided for hydraulic centering. When unlocking is required, only working oil pressure is required to be removed, and the lockup pistons are automatically retracted to the groove of the annular boss of the piston rod to finish unlocking under the action of spring forces.

Description

technical field [0001] The invention belongs to an auxiliary device of an automobile rear wheel steering system, specifically a hydraulic centering cylinder with a mechanical locking function, and belongs to the field of automobile steering systems. Background technique [0002] With the widespread use of multi-axle technology on heavy-duty vehicles and military vehicles, problems such as severe tire wear, large turning radius, and poor handling stability have emerged accordingly. Rear-wheel steering technology can be said to be the best solution to these problems. Among them, the electro-hydraulic rear wheel steering technology has the most advantages. The electronic control unit can accurately realize the extension and retraction distance of the piston rod of the hydraulic steering cylinder by controlling the flow and direction of the hydraulic valve. The displacement of the rod realizes the precise control of the rear wheel's turning angle. The use of electronically con...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing technology can only be locked elastically, and the driving stability of the vehicle will be deteriorated under the impact of a large ground impact load on the steering wheel, and to provide a hydraulic pair with a mechanical locking function. Middle cylinder

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