JPS6018302U

JPS6018302U - cushion valve

Info

Publication number: JPS6018302U
Application number: JP8352784U
Authority: JP
Inventors: 松沢　邦彦
Original assignee: 三菱重工業株式会社
Priority date: 1984-06-07
Filing date: 1984-06-07
Publication date: 1985-02-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のクッションバルブおよびその接続の１例
を示す回路図、第２図は本考案のクッションバルブの１
例とその接続を示す回路図、第３図および第４図は方向
切換弁の位置を異にする第２図と同様な図である。１・・・・・・ポンプ、２・・・・・・方向切換弁、３
・・・・・・油圧モータ、４・・・・・・メインリリー
フバルブ、５・・・・・・戻り管路、６．　７．８・・
・・・・管路、９・・・・・・吐出口、１０・・・・・
・クッションバルブ、１０ａ・・・・・・弁箱、１１ａ
、ｌｌｂ・・・・・・弁体、１２ａ、１２ｂ・・・・・
・ばね、１３ａ、１３ｂ・・・・・・ピストン、１４ａ
、１４ｂ・・・・・・逆止弁、１５ａ、１５ｂ・・・・
・・ピストン受圧室、１６ａ、１６ｂ・・・・・・接続
口、１７ａ、１７ｂ・・・・・・通路、１８ａ、　　１
８ｂ−−−−−−壁。Fig. 1 is a circuit diagram showing an example of a conventional cushion valve and its connection, and Fig. 2 is an example of a cushion valve of the present invention.
The circuit diagrams of FIGS. 3 and 4 showing examples and their connections are similar to FIG. 2 but with different positions of the directional control valves. 1... Pump, 2... Directional switching valve, 3
... Hydraulic motor, 4 ... Main relief valve, 5 ... Return pipe, 6. 7.8...
...Pipe line, 9...Discharge port, 10...
・Cushion valve, 10a... Valve box, 11a
, llb... Valve body, 12a, 12b...
・Spring, 13a, 13b... Piston, 14a
, 14b... Check valve, 15a, 15b...
... Piston pressure receiving chamber, 16a, 16b ... Connection port, 17a, 17b ... Passage, 18a, 1
8b------Wall.

Claims

[Scope of utility model registration request]

In a cushion valve 10 provided in parallel to a hydraulic motor drive circuit consisting of a pump 1, a main relief valve 4, a directional control valve 2, and a hydraulic motor 3, a spring 1 for setting the pressure of the relief valve is a component of the cushion valve.
Pistons 13a, 13b and piston pressure receiving chambers 15a, 15b are provided at the rear of the pistons 2a, 12b so that the pistons move according to the pressure in the piston pressure receiving chambers to change the initial load of the spring and change the cushion valve pressure setting. . A cushion valve, wherein the piston pressure receiving chamber is communicated with a conduit between an outlet of the pump and an inlet of the directional control valve.