JPS5990672U

JPS5990672U - relief valve

Info

Publication number: JPS5990672U
Application number: JP18754882U
Authority: JP
Inventors: 邦彦吉田; 越　憲一
Original assignee: 日立建機株式会社
Priority date: 1982-12-10
Filing date: 1982-12-10
Publication date: 1984-06-19

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]

第１図は従来技術によるＩＪ　ＩＪ−フ弁の縦断面図、
第２図は本考案の一実施例を示す縦断面図である。１・・・ケーシング、２・・・スリーブ、３・・・高圧
側ポート、４・・・低圧側ポート、５・・・弁座部材、
９・・・ポペット、１０・・・ディファレンシャルピス
トン２．１１・・・油室、１４・・・ばね、２１・・・
油室、２２・・・油路。FIG. 1 is a vertical cross-sectional view of an IJ valve according to the prior art.
FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Casing, 2...Sleeve, 3...High pressure side port, 4...Low pressure side port, 5...Valve seat member,
9...Poppet, 10...Differential piston 2.11...Oil chamber, 14...Spring, 21...
Oil room, 22... oil passage.

Claims

[Scope of utility model registration request]

a valve body having a high-pressure side port and a low-pressure side port; a valve seat member interposed between the high-pressure side port and the low-pressure side port; A poppet that connects and blocks communication between the high-pressure side port and the low-pressure side port by depositing dust on a member, and a differential that slidably fits the poppet at one end and abuts the valve body at the other end. In a relief valve consisting of a piston and a spring for setting relief pressure stretched between the poppet and the valve body, an annular oil chamber is formed between the inner peripheral surface of the valve body and the outer peripheral surface of the poppet. The relief valve is characterized in that the poppet is formed with an oil passage that communicates the oil chamber with the high pressure side port.