JPS58125701U

JPS58125701U - hydraulic distribution device

Info

Publication number: JPS58125701U
Application number: JP2257182U
Authority: JP
Inventors: 猛小野
Original assignee: カヤバ工業株式会社
Priority date: 1982-02-19
Filing date: 1982-02-19
Publication date: 1983-08-26

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 drawings]

図面第１図は従来の断面図、第２図はこの考案の１実施
例を示す断面図である。１４・・・バルブ本体、１５・・・スプール、１８・・
・ばね室、１９・・・スプリング、２０・・・第１供給
ポート、２１・・・第２供給ポート、２２・・・タンク
ポート、２３−・・・中継室、２４・・・作業機回路、
２５・・・連通路、２７．２８・・・ポンプ、２９・・
・プランジャ、３０・・・圧力室、３７・・・オリフィ
ス、４０・・・パイロットポペット、４３・・・通路、
４４・・・タンク。FIG. 1 is a sectional view of a conventional device, and FIG. 2 is a sectional view showing an embodiment of this invention. 14... Valve body, 15... Spool, 18...
・Spring chamber, 19... Spring, 20... First supply port, 21... Second supply port, 22... Tank port, 23-... Relay room, 24... Work machine circuit ,
25...Communication path, 27.28...Pump, 29...
- Plunger, 30... Pressure chamber, 37... Orifice, 40... Pilot poppet, 43... Passage,
44...Tank.

Claims

[Scope of utility model registration request]

A first supply port, a second supply port, a tank port, and an intermediate chamber are formed in the valve body, and the first supply port and the relay chamber are always communicated with a communication passage leading to a working machine circuit, etc., while at least two a pump', one pump communicating with the first supply port, the other pump communicating with the second supply port, and one end of the spool provided within the valve body facing the spring chamber; The spring chamber faces the pressure chamber directly or indirectly through a plunger, etc., and the pressure receiving area at one end of the spool is made sufficiently small compared to the other end, while the spring chamber communicates with the tank through an orifice, and the pressure chamber When the first supply port is always in communication and the spool is held in its original position by the action of the spring in the spring chamber, the second supply port is in communication with the tank port, and the second supply port is in communication with the relay chamber. On the other hand, the pressure in the pressure chamber acts and the spool moves against the spring, thereby cutting off communication between the second supply port and the tank port, and connecting the second supply port and the relay chamber. A hydraulic distribution device in which the communication path and the spring are communicated with each other is provided with a pilot poppet that senses the pressure in the communication path and opens the path.