A self-lubricating vertical jack

By coating the outer surface of the jack piston rod with a lubricating coating and filling the wedge groove with grease, combined with an oil reservoir and sealing structure, the problems of insufficient lubrication and wear of the jack are solved, achieving self-lubrication and leak-proof sealing, thereby improving the service life and operational safety of the equipment.

CN224619534UActive Publication Date: 2026-08-11ZHEJIANG WINRAY DIGITAL TECH CO LTD
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Patent Information

Application Number
CN202521892311.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-09-03
Publication Date
2026-08-11
Estimated Expiration
2035-09-03

AI Technical Summary

Technical Problem

Existing jack devices suffer from insufficient lubrication, uneven lifting, and short service life. In particular, the exposed hydraulic telescopic rod structure is prone to wear, and the lubrication process is cumbersome, affecting work efficiency and equipment safety.

Method used

A self-lubricating vertical jack was designed, which uses a piston rod with a lubricating coating on the outer surface, a wedge groove filled with grease, an oil reservoir and a sealing structure, combined with a limit sleeve and sealing ring, to achieve self-lubrication and leak-proof sealing, thereby enhancing the lubrication effect and sealing performance of the equipment.

Benefits of technology

It achieves self-lubrication, reduces friction, extends equipment life, prevents hydraulic oil leakage, improves operational safety and equipment stability, and avoids the inconvenience of manual lubrication and equipment wear.

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Abstract

This invention proposes a self-lubricating vertical jack, aiming to solve the problems of insufficient lubrication, uneven lifting, and short service life of existing jack devices. It comprises a hydraulic cylinder, base, and pressure rod. The piston rod is covered with a lubricating coating, and the outer wall of the piston has a wedge-shaped groove filled with grease, which, together with the oil reservoir on the piston rod, achieves self-lubrication. Simultaneously, a limiting sleeve and a sealing ring enhance sealing and prevent leakage. A return valve and a safety stop valve on the base ensure operational safety. Through the synergistic effect of the lubricating coating, wedge-shaped groove grease, and oil reservoir, friction is reduced, extending the equipment's lifespan. The sealing structure effectively prevents hydraulic oil leakage, ensuring stable operation. The safety valve provides dual protection, improving operational safety. This invention is easy to operate, has low maintenance costs, and combines practicality and sealing, making it suitable for lifting operations in various scenarios.
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