A hydraulic breaker cylinder component

By adding high-pressure oil grooves and oil feed grooves to the middle cylinder block of the hydraulic breaker, we ensure that the high-pressure oil always reaches the middle cylinder block, solving the problem of lack of support force in the initial stage of work, and achieving full-process support for large pistons, avoiding the strain of the piston and cylinder block, oil leakage and weak impact of the breaker.

CN112983927BActive Publication Date: 2025-03-28MAANSHAN KAMET HYDRAULIC MASCH MFG CO LTD
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Patent Information

Application Number
CN202110229658.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-03-02
Publication Date
2025-03-28
Estimated Expiration
2041-03-02

AI Technical Summary

Technical Problem

At the beginning of the working stage of the hydraulic breaker, the piston lacks the effect of high-pressure oil, resulting in the seal being unable to produce sufficient axial and radial compression and cannot effectively support the piston, which in turn causes eccentric movement of the piston in the cylinder, causing the piston and the inner surface of the cylinder to be strained, oil leakage and weak strikes.

Method used

By adding a high-pressure oil trench and an oil feed trench on the middle cylinder block and connecting it with the oil path between the oil outlet of the excavator's main pump and the multiple valve, it is ensured that when the excavator is in action, the high-pressure oil always reaches the middle cylinder block, so that the seal can also be affected by the high-pressure oil in the early stage of work, generating sufficient compression force to support the piston.

Benefits of technology

It effectively reduces the eccentric movement of the piston in the cylinder, avoids contact and strain between the piston and the inner surface of the cylinder, prevents oil leakage and weak strikes of the breaker, extends the service life of the piston and reduces maintenance costs.

✦ Generated by Eureka AI based on patent content.
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Abstract

The present invention discloses a hydraulic breaker middle cylinder component, the middle cylinder component comprises: a piston 1, a middle cylinder body 2, a piston ring 3, a seal 4 and a reversing valve 5; a fifth piston rod seal groove 25, a second oil return groove 26, a high pressure oil groove 27 and a sixth piston rod seal groove 28 are added to the original sealing structure of the inner hole of the middle cylinder body 2 and the piston head; an oil supply groove 36 is added to the original inner hole sealing structure of the piston ring 3, a radial through hole a is arranged in the oil supply groove 36, and is connected to the oil supply groove 12 arranged on the piston ring; an oil path 13 is arranged on the middle cylinder body 2 to be connected to the high pressure oil groove 27 and the oil supply groove 12, and the oil path 13 is externally connected to the high pressure oil supply port 14. The present invention effectively solves the problems of piston and cylinder body strain and oil leakage that are easy to be caused by the breaker in the initial stage of work by enhancing the high pressure oil support function of the front and rear sections of the piston.
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