JPS5820705U

JPS5820705U - counterbalance valve

Info

Publication number: JPS5820705U
Application number: JP11494581U
Authority: JP
Inventors: 賢介井奥
Original assignee: 株式会社ナブコ
Priority date: 1981-07-31
Filing date: 1981-07-31
Publication date: 1983-02-08

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図はこの考案のカウンタバランス弁の一実施例を
、それが組込まれる圧力流体回路と共に示す断面図であ
る。１・・・・・・弁本体、２・・・・・・スプール、３・
・・・・・ネガティブブレーキ、４・・・・・・アクチ
ュエータ、５，６・・・・・・アクチュエータポート、
７・・・・・・方向切換弁、８゜９・・・・・・給排ポ
ート、１０・・・・・・ブレーキポート、１１・・・・
・・タンク、１２・・・・・・タンクポート、２０゜２
１・・・・・・ばね、３９・・・・・・第１切換部、３
９・・・・・・第２切換部。- FIG. 1 is a sectional view showing an embodiment of the counterbalance valve of this invention together with a pressure fluid circuit in which it is incorporated. 1... Valve body, 2... Spool, 3...
...Negative brake, 4...Actuator, 5,6...Actuator port,
7... Directional switching valve, 8゜9... Supply/discharge port, 10... Brake port, 11...
... Tank, 12 ... Tank port, 20゜2
1... Spring, 39... First switching section, 3
9...Second switching section.

Claims

[Scope of utility model registration request]

The valve body has an actuator port, two supply/discharge ports that connect the directional control valve, a brake port that connects the negative brake of the actuator, and a tank port, and each supply/discharge port that faces each other from both sides in the longitudinal direction. It consists of a spool built into the valve body that can be slid in the longitudinal direction against springs on both sides due to pressure, and this spool connects the brake port and tank port in a neutral position that blocks the actuator boat and the supply/discharge port. a first switching part that cuts off the brake port and the tank port in an operating position where the actuator port and the supply/discharge port are communicated by sliding due to pressure from the supply/discharge port; A counterbalance valve characterized by comprising a second switching part that communicates one of the supply/discharge ports with the brake port when the port is shut off.