A two-way buffer valve

Abstract

The invention discloses a two-way buffer valve. The two-way buffer valve comprises a screw sleeve provided with a valve base; the valve base is provided with an A oil port and a B oil port; a valve element is slidingly connected into the valve base; a spring for forcing the valve element to move to the A oil port is arranged in the screw sleeve; an oil return cavity is arranged in the screw sleeve; an insertion hole is formed in the valve element; a push rod in clearance fit with the insertion hole is slidingly connected into the insertion hole; a first mounting groove and a second mounting groove are formed in the upper and lower ends of the insertion hole in the valve element; a first steel ball and a second steel ball are arranged in the first mounting groove and the second mounting groove; a plug is arranged in the first mounting groove; a screw plug is arranged in the second mounting groove; a second circulating hole is formed in the screw plug; and a fourth circulating hole and athird circulating hole for communicating the oil return cavity with the insertion hole are formed in the valve element. The valve is a rotary buffer valve simple in structure, convenient to machine and capable of realizing two-way buffering.

Description

Technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a two-way buffer valve. Background technique [0002] In modern mechanical equipment slewing devices, a large number of hydraulic circuits with buffer functions are used, such as excavator slewing devices, crane slewing devices, aerial work vehicle slewing devices, manipulator slewing devices, and agricultural and forestry machinery slewing devices, among which the swing buffer valve is this type The key hydraulic components of the system and the performance of the rotary cushion valve directly affect the performance of the main engine. The existing rotary buffer valves are divided into two types: plate rotary buffer valves and cartridge rotary buffer valves according to the connection mode. In order to reduce installation space and improve system reliability, cartridge rotary buffer valves are generally used in the system. For example, the authorized announcement number is ...

AI Technical Summary

Problems solved by technology

Although this invention can realize a simple buffer overflow function, it has the following disadvantages: first, it can only realize a one-way buffer function. One buffer valve is installed each, and the two rotary buffer valves are integrated into the valve plate, which increases the volume on the one hand and increases the cost on the other hand; secondly, in this invention, the structure is more complicated, the requirements for processing and assembly are high, and the overall cost is high

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