Graphite copper sleeve type piston rod upper assembly capable of replacing guiding belt

Abstract

A graphite copper sleeve piston rod upper assembly that can replace the guide belt belongs to the technical field of hydraulic equipment. The end of the hydraulic cylinder body is provided with an internal seal, a graphite copper sleeve assembly and an external seal in sequence from the inside to the outside. The sleeve assembly is set inside the inner seal, the outer seal is close to the inner seal and the graphite copper sleeve assembly and is tightly connected with the hydraulic cylinder body, and the outer seal, graphite copper sleeve assembly and inner seal are all sleeved on the piston rod and form a sliding fit connection with the piston rod. The structure of the invention is simple and the working principle is clear. The combination of graphite copper sleeve and inner and outer seals is used to replace the traditional resin copper powder guide belt. The graphite plays a self-lubricating role, and the copper sleeve plays a The anti-friction effect reduces the movement resistance of the piston rod, makes the movement of the piston rod more smooth, reduces the eccentric wear of the piston rod, and prolongs the working life of the sealing ring; at the same time, the copper sleeve also increases the radial bearing capacity. Improve the working efficiency of the equipment.

Description

technical field [0001] The invention belongs to the technical field of hydraulic equipment, and relates to an assembly on a piston rod, in particular to a graphite copper sleeve type piston rod assembly that can replace a guide belt. Background technique [0002] The hydraulic cylinder is the most basic hydraulic equipment, and its use range is extremely wide. The end face seal of the hydraulic cylinder is usually sealed by a screw-tightened one-piece end cover. The piston rod passes through the center of the end cover, and the piston acts in the hydraulic cylinder. However, this method exists The problem of coaxial precision between the piston rod and the inner hole of the hydraulic cylinder is prone to eccentric wear of the piston during use, which affects the working life of the piston sealing ring; in order to solve the problem of coaxial precision, a combination of external sealing and internal sealing has emerged , where the inner seal and the piston rod eliminate the ...

AI Technical Summary

Problems solved by technology

[0003] The present invention makes improvements to the deficiencies such as plastic deformation of the above-mentioned guide belt when it bears a large load and leakage of the sealing ring, and proposes a graphite copper sleeve type piston rod upper assembly that can replace the guide belt, which can increase the radial load. Ability to improve the fluency of the piston rod movement, which has a good role in promoting the work efficiency of the equipment

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