A piston rod blank for a hydraulic cylinder

By designing an annular groove and guide assembly in the cylinder piston rod blank, using the cooperation of the protrusion and the limiting groove to fix the dustproof oil seal, and combining the guide column and threaded rod, the problems of piston rod rotation and maintenance difficulties are solved, and the stability and maintenance convenience are improved.

CN115681252BActive Publication Date: 2026-01-30FUJIAN QINGMAN FORGING TECH CO LTD
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Patent Information

Application Number
CN202211308961.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-25
Publication Date
2026-01-30
Estimated Expiration
2042-10-25

AI Technical Summary

Technical Problem

The piston rod of the hydraulic cylinder rotates after long-term reciprocating motion, resulting in poor connection stability, frequent maintenance and high costs. The existing cylinder body is a one-piece structure, which makes maintenance and disassembly difficult.

Method used

A piston rod blank for a hydraulic cylinder is designed. An annular groove is opened on the end face of the cylinder body and a connecting sleeve is inserted. The connecting sleeve is equipped with a guide component and a dustproof oil seal. The dustproof oil seal is fixed by the cooperation of the protrusion and the limiting groove. The connecting sleeve is fixed to the cylinder body by fastening bolts. The stability of the piston head is improved by combining the guide column and the threaded rod, and the parts can be replaced individually.

Benefits of technology

It improves the stability of the reciprocating motion of the piston rod, simplifies the maintenance process, reduces maintenance costs, avoids the need for complete replacement, and enhances the connection stability and maintenance convenience of the piston rod.

✦ Generated by Eureka AI based on patent content.
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Abstract

This invention discloses a hydraulic cylinder piston rod blank, including a cylinder body. An annular groove is formed on the end face of the cylinder body, and a connecting sleeve is inserted into the annular groove. A guide assembly is fixedly connected to the end of the connecting sleeve. The guide assembly includes a cover, which is fixedly connected to the end face of the connecting sleeve. A turntable is fixedly connected to the outer wall of the cover. A through hole is formed on the surface of the cover, and a limiting groove is formed inside the through hole. This hydraulic cylinder piston rod blank, through the cooperation of the protrusion and the limiting groove, fixes the dustproof oil seal, preventing it from moving. Simultaneously, a limiting slider on the inner wall of the dustproof oil seal limits the sliding groove formed on the side wall of the rod. The connecting sleeve and cylinder body are fixedly connected together by fastening bolts, thereby preventing the cover from rotating or falling off, preventing the piston rod from rotating, and improving the stability of the piston rod after reciprocating motion.
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