Middle cylinder component of hydraulic breaking hammer

Abstract

The invention discloses a middle cylinder component of a hydraulic breaking hammer. The middle cylinder component of the hydraulic breaking hammer comprises a piston 1, a middle cylinder body 2, a piston ring 3, a sealing piece 4 and a reversing valve 5; a fifth piston rod sealing piece groove 25, a second oil return groove 26, a high-pressure oil groove 27 and a sixth piston rod sealing piece groove 28 are additionally arranged on an original sealing structure which is matched with a piston head in an inner hole of the middle cylinder body 2; an oil feeding groove 36 is additionally formed in an original inner hole sealing structure of the piston ring 3; a radial through hole a is formed in the oil feeding groove 36 and communicated with an oil inlet groove 12 formed in the piston ring; an oil way 13 is arranged on the middle cylinder body 2 and communicated with the high-pressure oil groove 27 and the oil inlet groove 12; and meanwhile the oil way 13 is externally connected with a high-pressure oil supply port 14. According to the invention, the high-pressure oil supporting effect of the front section and the rear section of the piston is enhanced, so that the problems that the piston and the cylinder body are prone to strain, oil leakage and the like in the initial working stage of the breaking hammer are effectively solved.

Description

technical field [0001] The invention belongs to the field of excavators and relates to a cylinder part of a hydraulic breaker. Background technique [0002] The hydraulic breaker is a crushing tool that converts hydraulic energy into mechanical impact energy. Driven by high-pressure oil, it automatically completes the high-frequency vibration of the piston in the cylinder through the mutual feedback control of its own valve control system and the cylinder-piston system. The reciprocating motion converts the hydraulic energy of the liquid into the impact energy of the piston to strike the drill rod, and outputs energy to achieve the purpose of breaking rocks. [0003] The middle cylinder part is one of the key parts of the hydraulic breaker. It is mainly composed of the middle cylinder body, piston, piston ring, seal and reversing valve. The following instructions refer to figure 1 , figure 2 . [0004] The middle cylinder of our company's utility model patent "A New Type...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a middle cylinder part of a hydraulic breaker, which further solves the problem that the breaker is easy to cause strain on the piston and cylinder in the initial stage of work on the basis of the company's existing patented technology

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