Connecting structure and installation method for piston and piston rod

A technology of connection structure and installation method, applied in the direction of piston rod, piston, piston ring, etc., can solve the problems of high processing technology requirements, piston shifting, easy desoldering, etc., to solve the problem of easy deformation and desoldering, and enhance locking The effect of fixing force and reducing production cost
CN102128261AInactive Publication Date: 2011-07-20CHENGDU SANHUAN METAL PROD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU SANHUAN METAL PROD
Publication Date
2011-07-20
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a connecting structure for a piston and a piston rod. The connecting structure mainly comprises the piston rod and the piston sleeved on the piston rod, wherein the piston is in interference fit with the piston rod; the outer wall of the piston is provided with a wear-resistant pad clamping groove and a sealing ring clamping groove; and the piston is provided with a tapered pin hole which passes through the piston rod from one side to the other side and is positioned in the wear-resistant pad clamping groove. The piston is in interference fit with the piston rod according to an expansion and contraction principle of metal, so that the piston and the piston rod are tightly sealed and locked; the tapered pin hole is drilled in the middle of the piston, so that the locking fixing force of the piston is increased, and the piston does not move or drain oil on the piston rod during work; and production benefit is improved, and production cost is reduced.
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Description

technical field

[0001] The invention relates to the field of installation of a piston and a piston rod, in particular to a connection structure of a piston and a piston rod and an installation method thereof. Background technique

[0002] The assembly and manufacture of the piston and piston rod of the existing hydraulic PE hot-melt butt welding machine can be roughly divided into three methods. Among them, the materials used for the piston parts do not need any heat treatment and can be made of non-ferrous metal materials. The piston rod parts require quenching and tempering heat treatment. , the outer surface needs electroplating treatment. The three processing methods are as follows:

[0003] The first method is as figure 1 As shown, the piston rod is divided into two sections, which are put on both ends of the piston and then locked by thread. Since the thread lock needs to be rotated, the piston and the piston rod are slidingly connected, and must be assembled between...

Claims

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