JPS63175375U

JPS63175375U -

Info

Publication number: JPS63175375U
Application number: JP20228886U
Authority: JP
Priority date: 1986-12-24
Filing date: 1986-12-24
Publication date: 1988-11-14
Also published as: JPH03612Y2

Description

[Brief explanation of drawings]

第１図は本考案の電磁油圧弁の実施例を示す縦
断面図、第２図は制御スプールの組付状態を示す
部分図、第３図は従来の電磁油圧弁の縦断面図、
第４図は従来の制御スプールを示す部分図、第５
図はオリフイスの開口面積の変化を示すグラフで
ある。１０……バルブ本体、１７……ソレノイド、１
８……スプリング、２５……ヨーク、３０……制
御スプール、３１……第１スプール、４１……第
２スプール、４２……切欠き。 FIG. 1 is a longitudinal sectional view showing an embodiment of the electrohydraulic valve of the present invention, FIG. 2 is a partial view showing the assembled state of the control spool, and FIG. 3 is a longitudinal sectional view of a conventional electrohydraulic valve.
Figure 4 is a partial diagram showing a conventional control spool;
The figure is a graph showing changes in the opening area of the orifice. 10... Valve body, 17... Solenoid, 1
8... Spring, 25... Yoke, 30... Control spool, 31... First spool, 41... Second spool, 42... Notch.

Claims

[Scope of utility model registration request]

a valve body having an inflow port and an outflow port and forming an inner hole through which these ports open; a control spool that changes a passage opening area between both ports; a spring that biases the control spool in a direction to close a passage communicating between both the ports; and a spring that is disposed coaxially with the control spool on the valve body. a solenoid wound around the outer periphery of the yoke and to which a control current is applied, so that the axial displacement of the control spool is brought about by the attractive force of the yoke generated in response to the current applied to the solenoid. In the electrohydraulic valve according to the present invention, the control spool is constituted by a first spool located on the yoke side and attracted to the yoke, and a second spool fitted to a fitting shaft portion of the first spool, An electrohydraulic valve characterized in that the second spool is provided with a notch that gradually becomes wider as the second spool is displaced in the yoke direction, on the end surface that comes into contact with the first spool.