JPH02105670U

JPH02105670U -

Info

Publication number: JPH02105670U
Application number: JP1414689U
Authority: JP
Priority date: 1989-02-10
Filing date: 1989-02-10
Publication date: 1990-08-22

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の実施例を示す断面図、第２図
は第１図の―線に沿う断面図、第３図は第１
図の矢印方向に見た図である。１０……バルブボデイ、１４……ドレーン用み
ぞ部、１８……スプール穴、２０……スプール、
２２……スプリング、３０……油室、３２，３４
，３６……油排出通路。 Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line - in Fig. 1, and Fig. 3 is a sectional view showing the embodiment of the present invention.
It is a view seen in the direction of the arrow in the figure. 10...Valve body, 14...Drain groove, 18...Spool hole, 20...Spool,
22... Spring, 30... Oil chamber, 32, 34
, 36...Oil discharge passage.

Claims

【実用新案登録請求の範囲】１鋳造製バルブボデイ内に設けられたスプール
穴にスプールが軸方向に移動可能に挿入され、ス
プールを停止位置方向に押圧するスプリングが設
けられており、油圧が供給されたときスプールの
受圧部にスプリングの力に対抗する向きの力を作
用する油室に制御対象油圧が導かれ、スプールが
受圧部に作用する油圧によつて停止位置からスプ
リングを圧縮する方向に所定量移動したとき制御
対象油圧が供給されている油室がバルブボデイに
設けられたドレーン用みぞ部に連通するように構
成される油圧リリーフバルブにおいて、ドレーン用みぞ部にこれから油を排出するため
の複数の油排出通路が設けられていることを特徴
とする油圧リリーフバルブ。２ドレーン用みぞ部を構成する壁のうち、制御
対象油圧が供給される油室側のものに、スプール
穴の軸線に直交する方向の切欠きが設けられてい
る請求項１記載の油圧リリーフバルブ。[Claims for Utility Model Registration] 1. A spool is inserted into a spool hole provided in a cast valve body so as to be movable in the axial direction, a spring is provided to press the spool toward a stop position, and hydraulic pressure is supplied. When this happens, the hydraulic pressure to be controlled is guided to the oil chamber that applies a force in the direction opposite to the force of the spring on the pressure receiving part of the spool, and the spool is moved from its stop position in the direction of compressing the spring by the hydraulic pressure acting on the pressure receiving part. In a hydraulic relief valve configured such that an oil chamber to which controlled oil pressure is supplied when a fixed amount of movement is made communicates with a drain groove provided in the valve body, a plurality of hydraulic pressure relief valves are configured to communicate with a drain groove provided in the valve body. A hydraulic relief valve characterized by being provided with an oil discharge passage. 2. The hydraulic relief valve according to claim 1, wherein a notch in a direction perpendicular to the axis of the spool hole is provided in the wall constituting the drain groove on the side of the oil chamber to which the hydraulic pressure to be controlled is supplied. .