Shell valve side integrated hydraulic power-assisted recirculating ball steering gear assembly

Abstract

The invention discloses a shell valve side integrated hydraulic power-assisted recirculating ball steering gear assembly. The shell assembly integrates a shell, a valve body and a side cover, the upper end of a steering screw assembly is fixed to the upper end of a main cylinder hole of the shell assembly through an upper plane thrust bearing, and the lower end of the steering screw assembly is fixed through a lower plane thrust bearing; an arm shaft assembly is supported by a non-output-end roller bearing and an output-end roller bearing, the non-output-end roller bearing is fixed in an inner hole of the shell assembly, the output-end roller bearing is fixed in an end cover assembly, and the end cover assembly and the shell assembly are mutually riveted and fixed; the outer circle of the left end of a torsion bar is in interference fit with an input shaft inner hole of an input shaft assembly, and the outer circle of the right end of the torsion bar is in interference fit with a screw inner hole of the steering screw assembly; steel ball flow is adopted between a steering nut assembly and the steering screw assembly to form ball screw transmission; and the steering nut assembly and the arm shaft assembly form rack and sector transmission. The invention solves the problems that: a traditional hydraulic power-assisted recirculating ball steering gear is huge in appearance and low in unit mass energy efficiency.

Description

technical field [0001] The invention relates to an automobile power steering gear, in particular to a hydraulic power-assisted circulating ball steering gear assembly. Background technique [0002] With the current development of the automobile industry at home and abroad, the automobile steering gear is also being continuously improved. Although the electronic steering gear has begun to be used, the hydraulic circulating ball steering gear is still widely used in automobiles all over the world especially because of its large and stable output torque. Used by manufacturers of heavy vehicles and auto parts. However, compared with the mechanical steering gear, the hydraulic power-assisted recirculating ball steering gear has a complex structure due to the increase of the hydraulic structure and also leads to a large external dimension; at the same time, the lack of energy efficiency ratio due to the complex structure leads to a decrease in the load capacity of the vehicle or a...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a shell-valve side integrated hydraulic circulating ball steering gear suitable for commercial vehicles with a more compact structure and lighter weight, which solves the problem of the traditional hydraulic power-assisted circulating ball steering gear. The problem of low quality and energy efficiency

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