JPH0183982U

JPH0183982U -

Info

Publication number: JPH0183982U
Application number: JP1987179379U
Authority: JP
Priority date: 1987-11-25
Filing date: 1987-11-25
Publication date: 1989-06-05

Description

[Brief explanation of the drawing]

第１図は本考案一実施例の電磁比例式圧力制御
弁示す断面図、第２図は実施例の（第１図）Ａ部
拡大断面図断面図である。１…バルブボデイ、１０ａ…バルブ穴、２０…
バルブスプール、２１ｂ…第１小径部、２２ｂ…
第２小径部、２１ｃ…第１段差部、２２ｃ…第２
段差部、３１…第１ストツパプレート（ストツパ
）、３２…第２ストツパプレート（ストツパ）、
４１…第１ソレノイド、４２…第２ソレノイド、
５１…第１センタリングスプリング、５２…第２
センタリングスプリング、５１ａ…第１リテーナ
、５２ａ…第２リテーナ、６１…第１ガイドブツ
シユ、６２…第２ガイドブツシユ、７１…第１フ
イードバツク室、７２…第２フイードバツク室。 FIG. 1 is a sectional view showing an electromagnetic proportional pressure control valve according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of part A (FIG. 1) of the embodiment. 1...Valve body, 10a...Valve hole, 20...
Valve spool, 21b...first small diameter part, 22b...
Second small diameter part, 21c...first step part, 22c...second
Step portion, 31...first stopper plate (stopper), 32...second stopper plate (stopper),
41...first solenoid, 42...second solenoid,
51...first centering spring, 52...second
Centering spring, 51a...first retainer, 52a...second retainer, 61...first guide bushing, 62...second guide bushing, 71...first feedback chamber, 72...second feedback chamber.

Claims

[Claims for Utility Model Registration] A valve spool that is slidably provided in a valve hole of a valve body and controls the hydraulic pressure of two output circuits, a first output hydraulic pressure and a second output hydraulic pressure; A first solenoid at one end and a second solenoid at the other end are provided at both ends and push in the first and second output hydraulic pressure increasing directions, and a first retainer and a second solenoid are provided at both ends of the valve spool. A first centering spring on one end side and a second centering spring on the other end side that are slidably biased to a neutral position via a retainer, and a first centering spring that has a small diameter at the other end of the valve spool.
A first stepped portion and a second stepped portion due to a diameter difference are adjacent to a small diameter portion and a second small diameter portion having a small diameter at one end, and are inserted into both ends of the valve hole with their outer peripheries in close contact with each other, A sliding hole for slidably supporting the first and second small diameter portions is formed in the center thereof, and the first and second output hydraulic pressures are guided between the first and second stepped portions. A first guide bush and a second guide bush forming a first feedback chamber and a second feedback chamber; and a first guide bush and a second guide bush provided outside the valve hole, capable of regulating the movement of both guide bushes in the axial direction, and a neutral position of the valve spool. a first stopper and a second stopper formed to be able to restrict the expansion of both centering springs by coming into contact with both retainers;
An electromagnetic proportional pressure control valve comprising: