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Piston base for effectively preventing blockage of piston

A piston seat and piston technology, applied in the direction of pistons, cylindrical pistons, plungers, etc., can solve the problems of easy sticking of pistons, achieve the effects of solving piston sticking, improving use efficiency and quality, and simple structure

Inactive Publication Date: 2016-05-11
龙工(上海)精工液压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the technical problem that the piston of the existing pilot control valve is easily stuck

Method used

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  • Piston base for effectively preventing blockage of piston
  • Piston base for effectively preventing blockage of piston
  • Piston base for effectively preventing blockage of piston

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Such as figure 2 , 3 As shown, it is a piston seat that effectively prevents the piston from being stuck provided by the present invention. The main body of the inner wall is the first inner cylindrical surface 2-1, and a stepped inner cylindrical surface 2-2 is designed below the first inner cylindrical surface 2-1. , the inner cylindrical surface 2-2 of the step forms a step with the first inner cylindrical surface 2-1; the inner cylindrical surface 2-2 of the step and the inner conical surface 2-4 are transitioned by a round chamfer 2-3, and the inner conical surface 2- 4 The lower side is in contact with the second inner cylindrical surface 2-5.

[0017] Insert the piston 1 into the above-mentioned piston seat 2 to make a piston assembly, so that the first inner cylindrical surface 2-1 of the piston seat 2 is in contact with the outer cylindrical surface 1-1 of the piston 1, as Figure 5 As shown, after the pilot control valve has been working for a long time, th...

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PUM

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Abstract

The invention discloses a piston base for effectively preventing blockage of a piston. An inner wall body of the piston base is a first inner cylindrical surface. The piston base is characterized in that a step extending in an inner diameter increasing direction is arranged at the lower end of the first inner cylindrical surface; the lower edge of the step is a step inner cylindrical surface; the step inner cylindrical surface is connected with a second inner cylindrical surface through an inner conical surface; and the inner diameter of the second inner cylindrical surface is smaller than the inner diameter of the first inner cylindrical surface. The piston base is simple in structure and long in service life, can preferably solve the blockage condition of the piston, reduces the after-sales repair cost of a pilot control valve, and improves the use efficiency and the use quality of a whole hydraulic pilot control system.

Description

technical field [0001] The invention relates to a piston seat which can effectively prevent the piston from sticking, and belongs to the technical field of pilot control valve structures. Background technique [0002] The pilot control valve is mainly used in the pilot hydraulic control system of small hydraulic excavators and other construction machinery, and is an important part of the pilot control system. In the pilot hydraulic control system, the pilot oil supply valve provides the working hydraulic oil for the pilot control valve. By controlling the pilot control valve, the pilot control hydraulic oil acts on the corresponding main valve control unit, driving the movement of the main valve control unit spool, implementing The corresponding actions of the actuators meet the operator's action requirements for the actuators. The piston assembly is one of the important components of the pilot control valve. [0003] Piston assemblies currently on the market such as figu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J1/00
CPCF16J1/00
Inventor 余红波琚永光张双红王康恋
Owner 龙工(上海)精工液压有限公司
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