Power steering oil pump for automobile

Abstract

The power steering oil pump for automobile includes pump body, valve body, pump cover, transmission member and inner pump cavity. The inner pump cavity includes oil inlet pressure board, oil outlet pressure board, stator, rotor, vane and spring; the valve body has slide valve, screw plug and spring as well as oil inlet and oil outlet on the upper end; the transmission member is connected via the valve shaft and the rotor inside the inner pump cavity; and there are skeleton oil sealing between the pump body and the pump shaft and O-ring on the oil outlet pressure board inside the inner pump cavity. The present invention features the separate plastic molding of and screw connection among the pump body, pump cover and valve body; planar connection between the pump cover and the valve body; pump body oil path set interface plane between the pump cover and the valve body; parting of the pump cover and the valve body at the low pressure oil cavity and high pressure cavity formed by the pump cover and the inner cavity parts.

Description

Technical field: [0001] The invention relates to an automobile power steering oil pump. Background technique: [0002] Automobile power steering oil pump is a power component in the automobile steering system that provides hydraulic energy to the steering gear to change and restore the driving direction of the automobile. It is based on the traditional vane pump technology and combines the overflow valve and the flow control valve skillfully. And formed. Except for the seals, all other components of this pump are made of steel-based metal parts, which are heavy; the movement is prone to noise; the surface is easy to corrode; the processing technology is complicated, and the multiple positioning makes the geometric shape accuracy low and the cleanliness poor. , the rough oil passage holes are connected at right angles to the inner wall of the pump body, resulting in large liquid resistance, poor oil flow, and unstable flow control; the pump cover is installed at the high-pre...

AI Technical Summary

Problems solved by technology

Except for the seals, all other components of this pump are made of steel-based metal parts, which are heavy; the movement is prone to noise; the surface is easy to corrode; the processing technology is complicated, and the multiple positioning makes the geometric shape accuracy low and the cleanliness poor. , the rough oil passage holes are connected at right angles to the inner wall of the pump body, resulting in large liquid resistance, poor oil flow, and unstable flow control; the pump cover is installed at the high-pressure oil chamber, and there is oil leakage at the junction of the pump cover and the pump body phenomenon; in addition, the production process uses a lot of equipment, requires a large number of people, and occupies a large area of ​​the factory building, so the manufacturing cost is high

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