JPH01144575U

JPH01144575U -

Info

Publication number: JPH01144575U
Application number: JP4045588U
Authority: JP
Priority date: 1988-03-29
Filing date: 1988-03-29
Publication date: 1989-10-04

Description

[Brief explanation of the drawing]

第１図は本考案の代表的な実施例を示すオイル
リリーフバルブの側断面図、第２図及び第３図は
同バルブの作動状態を示す要部断面図、第４図は
従来の直動形リリーフバルブの側断面図、第５図
及び第６図は同バルブの作動状態を示す要部断面
図、第７図は本考案のリリーフバルブと従来のリ
リーフバルブの特性図である。図の主要部分の説明、１…バルブ本体、３…弁
体、３ａ…小径部、３ｂ…大径部、３ｆ…中央孔
、３ｇ…側部孔、６…リリーフ孔、８…スプリン
グ、１１…小球。 Fig. 1 is a side sectional view of an oil relief valve showing a typical embodiment of the present invention, Figs. 2 and 3 are sectional views of essential parts showing the operating state of the valve, and Fig. 4 is a conventional direct-acting oil relief valve. 5 and 6 are cross-sectional views of essential parts showing the operating state of the valve, and FIG. 7 is a characteristic diagram of the relief valve of the present invention and a conventional relief valve. Explanation of the main parts of the figure, 1...Valve body, 3...Valve body, 3a...Small diameter part, 3b...Large diameter part, 3f...Central hole, 3g...Side hole, 6...Relief hole, 8...Spring, 11... Small ball.

Claims

[Scope of utility model registration request]

A small-diameter oil passage communicating with a hydraulic pressure source is connected to a large-diameter valve hole through a stepped seating surface, and a valve body has a relief hole formed in the middle of the valve hole, and a relief hole is formed in advance in the valve hole. An oil relief valve comprising a valve body that is pressed against the seating surface by spring pressure, slides within the valve hole due to oil pressure fluctuations from the oil passage, and releases excess pressure from the relief hole when the oil pressure exceeds a set pressure. , the valve body has a small diameter part having the same diameter as the oil passage and a large diameter part having the same diameter as the valve hole, and an internal chamber is formed in the small diameter part, and inside the same chamber, the oil passage and the An oil relief valve characterized in that a seating surface is provided with passages communicating with each other, and a check valve provided in the same chamber is provided with a small ball that normally biases the passages communicating with the oil passages in a direction to be closed. .