JPS59164803U

JPS59164803U - Hydraulic actuator operation circuit

Info

Publication number: JPS59164803U
Application number: JP5801083U
Authority: JP
Inventors: 健一武井
Original assignee: 日立建機株式会社
Priority date: 1983-04-20
Filing date: 1983-04-20
Publication date: 1984-11-05

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来技術による油圧アクチュエータの操作回路
を示す図、第２図は本考案による油圧アクチュエータの
操作回路の一実施例を示す図である。１・・・走行用油圧モータ、２・・・油圧ポンプ、３・
・・油圧パイロット方向切換弁、４・・・パイロット弁
、５・・・操作用油圧ポンプ、９及び１２０・・・電磁
切換弁、１１０及び１３０・・・キー付スイッチ、１４
０・・・オイルタンク。第１図　。第２図FIG. 1 is a diagram showing an operating circuit for a hydraulic actuator according to the prior art, and FIG. 2 is a diagram showing an embodiment of the operating circuit for a hydraulic actuator according to the present invention. 1... Hydraulic motor for traveling, 2... Hydraulic pump, 3...
...Hydraulic pilot directional switching valve, 4...Pilot valve, 5...Hydraulic pump for operation, 9 and 120...Solenoid switching valve, 110 and 130...Switch with key, 14
0...Oil tank. Figure 1. Figure 2

Claims

[Scope of utility model registration request]

A hydraulic actuator driven by pressure oil, a first hydraulic pump that supplies pressure oil for driving the hydraulic actuator, and a pressure that controls the supply direction of the pressure oil supplied from the first hydraulic pump to the hydraulic actuator. oil direction switching mechanism;
A hydraulic actuator operating device comprising a second hydraulic pump that supplies pressure oil for driving the pressure oil direction switching mechanism, wherein a first pipe line through which pressure oil is supplied from the first hydraulic pump to the hydraulic actuator. A first pipe is provided in the middle of the pipe and connects or cuts off the first pipe by excitation or demagnetization.
a solenoid valve, a first switch that instructs the first solenoid valve to be energized or demagnetized, and a second pipe line that is supplied from the second hydraulic pump to the pressure oil direction switching mechanism; Alternatively, a hydraulic actuator operating circuit comprising a second solenoid valve that connects or cuts off the second pipe line by demagnetization, and a second switch that instructs the second solenoid valve to be energized or demagnetized. .