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Piston for avoiding clamping stagnation

A piston and integrated technology, which is applied in the direction of piston, cylindrical piston, plunger, etc., can solve the problems of pilot control valve piston sticking, etc., and achieve the effects of reducing maintenance costs, long service life, improving use efficiency and use quality

Inactive Publication Date: 2016-06-15
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 technical problem to be solved by the present invention is to provide a stuck-avoiding piston with simple structure and long service life, which solves the problem of stuck piston in the pilot control valve

Method used

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  • Piston for avoiding clamping stagnation
  • Piston for avoiding clamping stagnation
  • Piston for avoiding clamping stagnation

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Embodiment

[0017] Such as figure 2 As shown, the piston of the present invention that avoids sticking is composed of a hemispherical part 4, a first part 1, a rounded frustum-shaped part 5, a second part 2 and a third part 3 from top to bottom, the first part 1, the second part The second part 2 and the third part 3 are cylindrical, and the upper side of the first part 1 is provided with a hemispherical part 4, and the transition between the first part 1 and the second part 2 is through a rounded frustum-shaped part 5, and the inverted The outer diameter of the top surface of the frustum-shaped part 5 is equal to the outer diameter of the first part 1, and the outer diameter of the bottom surface of the rounded truncated part 5 is equal to the outer diameter of the second part 2. The hemispherical part 4, the first part 1 , The rounded frustum-shaped part 5, the second part 2 and the third part 3 are integrally formed.

[0018] Such as image 3 As shown, the outer diameter of the firs...

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Abstract

The invention provides a piston that avoids sticking, which is characterized in that it includes a first part, a second part and a third part arranged in sequence from top to bottom, the first part and the second part are cylindrical, and the top of the third part The surface is circular, and its outer diameter is larger than that of the first part, and the outer diameter of the first part is larger than that of the second part, wherein the transition between the side surface of the second part and the top surface of the third part is rounded. The invention cancels the outer circular groove of the steel wire retaining ring, and adds a second cylindrical part and a third cylindrical part on the basis of the outer cylindrical surface of the traditional piston. The side of the second cylindrical part is connected with the third cylindrical part Round transitions are used between the top faces of the shaped parts. The invention has simple structure and long service life, can better solve the stuck situation of the piston, reduce the after-sale maintenance cost of the pilot control valve, and improve the use efficiency and quality of the hydraulic pilot control system of the whole machine.

Description

technical field [0001] The invention relates to a piston that avoids sticking, and belongs to the technical field of pilot control valve part structure. 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] Such as figure 1 As shown, in the piston assembly currently on the market, when the pisto...

Claims

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Application Information

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IPC IPC(8): F16K51/00F16J1/00
CPCF16K51/00F16J1/00
Inventor 余红波琚永光白永刚马宗宇王康恋
Owner 龙工(上海)精工液压有限公司
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