JPS6445070U

JPS6445070U -

Info

Publication number: JPS6445070U
Application number: JP14049287U
Authority: JP
Priority date: 1987-09-14
Filing date: 1987-09-14
Publication date: 1989-03-17
Anticipated expiration: 2002-09-14
Also published as: JPH0529429Y2

Description

[Brief explanation of the drawing]

第１図は本考案第１実施例の電磁比例式圧力制
御弁示す断面図、第２図は第１実施例の第１ソレ
ノイドを駆動させたときの作動状態を示す断面図
、第３図は両ソレノイドの電流と両出力回路の液
圧の関係を示すグラフ、第４図は本考案第２実施
例の電磁比例式圧力制御弁の要部を示す断面図で
ある。１０……バルブボデイ、２０……バルブスプー
ル、２３……第１フイードバツク室用孔、２４…
…第２フイードバツク室用孔、２５……第１フイ
ードバツク孔、２６……第２フイードバツク孔、
３０……第１ソレノイド、３１……プランジヤ、
４０……第２ソレノイド、４１……プランジヤ、
５１……第１フイードバツク室、５２……第２フ
イードバツク室。 Fig. 1 is a sectional view showing the electromagnetic proportional pressure control valve of the first embodiment of the present invention, Fig. 2 is a sectional view showing the operating state when the first solenoid of the first embodiment is driven, and Fig. 3 is A graph showing the relationship between the currents of both solenoids and the hydraulic pressures of both output circuits, and FIG. 4 is a sectional view showing the main parts of the electromagnetic proportional pressure control valve according to the second embodiment of the present invention. 10... Valve body, 20... Valve spool, 23... First feedback chamber hole, 24...
...Second feedback chamber hole, 25...First feedback hole, 26...Second feedback hole,
30...first solenoid, 31...plunger,
40...Second solenoid, 41...Plunger,
51...First feedback room, 52...Second feedback room.

Claims

[Claims for Utility Model Registration] A valve spool that is slidably provided within a valve body and that proportionally controls the first or second output hydraulic pressure by adjusting the amount of throttle, and the valve spool is pressed from both ends with a plunger. Both output hydraulic pressures are respectively guided from a first solenoid and a second solenoid, and a feedback hole formed in the valve spool, and the feedback hydraulic pressure of both output hydraulic pressures is guided in a direction opposite to the pressing direction of both solenoids. An electromagnetic proportional pressure control valve comprising a feedback chamber and a second feedback chamber, in which a valve spool slides to a position where the pressing force of a solenoid and its feedback hydraulic pressure are balanced to obtain an output hydraulic pressure proportional to the solenoid pressing force. , the feedback holes are drilled to both ends of the valve spool, the plunger is slidably inserted into the feedback hole with the outer periphery of the plunger in contact with the inner periphery of the hole, and both feedback chambers are opened;
An electromagnetic proportional pressure control valve characterized by having a feedback hole and a plunger tip.