A kind of control valve of the inner oil channel of the automobile power steering gear

Abstract

The invention discloses an inner oil duct control valve of an automobile power steering gear. The inner oil duct control valve comprises a screw hollow shaft (1), an input shaft (2) and a valve body, wherein one end of the screw hollow shaft (1) is provided with a hollow shaft fixed end (3); a torsion bar (4) is arranged in the screw hollow shaft (1); one end of the torsion bar (4) is connected with one end of the input shaft (2) through a driving pin (10); a gap passage (5) is arranged between the inner wall of the screw hollow shaft (1) and the outer surface of the torsion bar (4); the outer wall at the end, close to the input shaft (2), of the screw hollow shaft (1) is provided with an upper cavity oil hole (8), and the outer wall at the other end of the screw hollow shaft (1) is provided with a lower cavity oil hole (9). The inner oil duct control valve has a compact structure; by arranging an inner oil duct, the complex structure of a conventional steering control valve is simplified, the oil inlet and return are smooth and quick, a steering gap of the steering valve is greatly reduced, the steering sensitivity is improved, and the steering operation performance of a vehicle is favorably improved.

Description

technical field [0001] The invention relates to a steering gear control valve, in particular to an oil channel control valve in an automobile power steering gear, and belongs to the technical field of auto parts. Background technique [0002] At present, the control valve of the automobile hydraulic power steering gear is widely used in the steering assembly of the automobile. The traditional steering gear structure is a powder metallurgy valve structure and a three-piece steel valve structure. Not sensitive enough, prone to steering clearance, especially for heavy-duty vehicles, due to the need for higher pressure and greater flow, the resulting steering clearance is larger, which is not conducive to the steering control of the vehicle. [0003] Such as the Chinese utility model patent announcement number: CN 202345757U, publication date: July 25, 2012. The utility model patent discloses a steering control valve for a recirculating ball power steering gear, which consists o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compact structure, small control valve clearance, steering steering gear for the defects and deficiencies of the existing automobile steering gear, such as large control valve clearance, insufficient steering sensitivity, prone to steering clearance, and poor steering control performance. High sensitivity, no steering clearance, good steering control performance, an oil passage control valve in the power steering gear of an automobile

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