One-way valve mechanism for excavator boom and rotation oil path system

Abstract

The invention discloses a one-way valve mechanism for an excavator boom and a rotation oil path system. A plurality of first throttling holes are formed in the periphery of the front end of a first one-way valve, a sleeve is arranged on the first one-way valve, a plurality of throttling buffer holes are evenly formed in the sleeve, and the sleeve is used for being communicated with a pressure oil path; a second one-way valve capable of moving is arranged in a cavity of the first one-way valve, and a plurality of second throttling holes are formed in the periphery of the second one-way valve; and the rotation oil path system is provided. In the rotation process, when an operation boom ascends, the second one-way valve moves in the direction of an oil supply source at the moment of boom starting, meanwhile, the head of the sleeve is stressed, the first one-way valve and the second one-way valve do same-direction movement, hydraulic oil flows over through the throttling holes to reduce the motion speed of the first one-way valve, and the first one-way valve continues to move until complete throttling is achieved; and the hydraulic oil flows over through the throttling buffer holes to reduce the motion speed of the first one-way valve, the rotation oil inlet amount is gradually changed, and shaking of the whole mechanism cannot be caused.

Description

technical field [0001] The invention relates to the compound operation of lifting and turning the arm of an excavator, in particular to a check valve mechanism and a turning oil circuit system for the arm of the excavator. Background technique [0002] In the process of excavator dumping, it often involves boom lifting and slewing composite operations. When the boom is operated to rise during the slewing process: the moment the boom starts, the oil inlet check valve moves forward to throttle the oil inlet of the slewing , the flow rate of the slewing is reduced, the slewing speed is instantly slowed down, and the slewing will shake, which will cause the whole machine to shake; when the boom stops, the oil inlet check valve moves backward. Increase, the rotation speed becomes faster, the rotation will shake, and the whole machine will also shake. This shaking makes the user unable to operate accurately, and the operating comfort is reduced. Therefore, prior art awaits furthe...

AI Technical Summary

Problems solved by technology

[0002] In the process of excavator dumping, it often involves boom lifting and slewing composite operations. When the boom is operated to rise during the slewing process: the moment the boom starts, the oil inlet check valve moves forward to throttle the oil inlet of the slewing , the flow rate of the slewing is reduced, the slewing speed is instantly slowed down, and the slewing will shake, which will cause the whole machine to shake; when the boom stops, the oil inlet check valve moves backward. Increase, the rotation speed becomes faster, the rotation will shake, and the whole machine will also shake. This kind of shaking makes the user unable to operate accurately, and the operating comfort is reduced.

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