Oil path structure of embedded multifunctional two-way holding valve

Abstract

The invention discloses an embedded multifunctional two-way holding valve oil way structure, and belongs to the technical field of hydraulic valves. A main valve rod is installed in the first valve element hole of the valve body in a matched mode. A left one-way valve element, a linkage valve rod and a right one-way valve element are sequentially installed in a second valve element hole of the valve body. The oil port P and the oil port T are communicated to the main valve rod; the oil port A is communicated with a left one-way valve core and a spring cavity thereof; the oil port B is communicated with a right one-way valve core and a spring cavity thereof; the oil port Pi and the oil port DR are communicated through a linkage valve rod; the other end of the oil duct I is communicated with the right end of the left one-way valve core and the left end of the linkage valve rod; and the other end of the oil duct II is communicated with the left end of the right one-way valve core and the right end of the linkage valve rod. The linkage valve rod has the function of linkage of the executing mechanism and the function of pressure selection, soft opening and soft braking of the executing mechanism are achieved, the impact of opening and closing of the executing mechanism is avoided, the operation stability of the executing mechanism is improved, and the operation comfort is improved.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a built-in multi-functional two-way holding valve oil circuit structure, which is mainly suitable for crawler-type walking, turning, main and auxiliary winding and other actuators with turning functions in construction machinery. Background technique [0002] With the rapid development of construction machinery, higher requirements have been put forward for the reliability, safety, environmental protection and control accuracy of the actuator and the comfort of operation of the construction machinery; the control accuracy of the rotary actuator in the construction machinery, Control timing and internal leakage control precision and other indicators determine the comfort of the operation process, the safety and reliability of the actuator and the accuracy of the actuator control. [0003] The Chinese patent discloses a load holding valve (CN105587701A), which includes a v...

AI Technical Summary

Problems solved by technology

[0005] 1. One-way load holding device, easy to form a negative pressure chamber;

[0006] 2. There is no buffer structure for opening and closing

[0007] 3. Does not have timing control function; the chaotic braking timing of soft and hard brakes leads to large impact on the actuator, which seriously affects the service life of the brake and the braked mechanism, and reduces the control accuracy of the actuator;

[0008] 4. The structure of valve stem and oil circuit is complex

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