JPS5820966U - Pressure fluid control device in power steering system - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は本考案による動力舵取装置の圧力流体制御装置
を概略的に示した構成図、第２図は第１図に示した圧力
制御弁の他の実施例を示す断面図である。 符号の説明、１０・・・・・・動力舵取装置、１１・曲
・パワーシリンダ、１２・・・用サーボ弁、１３・・間
操舵ハンドル、１６・・・・・・流体圧力源（油圧ポン
プ）、１８・・・・・・リザーバ、２０・・・・・・流
量制御弁、２２・・・・・・絞り部、２４−・・・・・
スプール弁体、Ｒ□・・・・・・第１油室、Ｒ２・・・
・・・第２油室、−３０・・・・・・圧力制御弁、３１
・・・・・・第１ポート、３２・・・・・・第２ポート
、３４・・・・・・スプール弁体、３５・・・・・・ス
プリング、３６・・・・・・ソレノイド、４０・・・・
・・電気的制御回路、４１・・・・・・ポテンショメー
タ、４２・・・・・・車速検出器。FIG. 1 is a block diagram schematically showing a pressure fluid control device for a power steering device according to the present invention, and FIG. 2 is a sectional view showing another embodiment of the pressure control valve shown in FIG. 1. Explanation of symbols: 10... Power steering device, 11... Servo valve for bending/power cylinder, 12... Servo valve, 13... Steering handle, 16... Fluid pressure source (hydraulic pump), 18...reservoir, 20...flow control valve, 22...throttle section, 24-...
Spool valve body, R□...1st oil chamber, R2...
...Second oil chamber, -30...Pressure control valve, 31
...First port, 32...Second port, 34...Spool valve body, 35...Spring, 36...Solenoid, 40...
...Electrical control circuit, 41...Potentiometer, 42...Vehicle speed detector.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 動力舵取装置のサーボ弁に流体圧力源を接続する供給管
の一部に絞り部を設け、かつ該絞り部の上流に開口する
第１油室と下流に連通ずる第２油室間の圧力差に応じて
前記第１油室から圧力流体をリザーバに還流させる弁体
を内蔵し前記供給管−を流れる圧力流体の流量を制御す
る流量制御弁を設けてなる流体回路において、前記流量
制御弁の第１油室に連通ずる第１ポートと第２油室に連
通ずる第２ポートを有するハウジング内にその中立位置
にて前記両ポートの連通を遮断し所定方向への摺動位置
にて前記両ポートを連通させる弁体を軸方向へ摺動可能
に嵌挿しかつ該弁体をその電気的入力に応じて所定方向
に摺動させるソレノイドを内蔵しでなる圧力制御弁を設
けたことを特徴とする動力舵取装置における圧力流体制
御装置。A constriction part is provided in a part of the supply pipe that connects a fluid pressure source to a servo valve of a power steering device, and the pressure between a first oil chamber that opens upstream of the constriction part and a second oil chamber that communicates with the downstream side. In the fluid circuit, the fluid circuit is provided with a flow control valve that has a built-in valve body that recirculates the pressure fluid from the first oil chamber to the reservoir according to the difference, and that controls the flow rate of the pressure fluid flowing through the supply pipe. A housing having a first port that communicates with a first oil chamber and a second port that communicates with a second oil chamber cuts off communication between the two ports at its neutral position and slides in a predetermined direction. A pressure control valve is provided, in which a valve body that connects both ports is slidably inserted in the axial direction, and a solenoid that slides the valve body in a predetermined direction in response to electrical input is provided. A pressure fluid control device for a power steering system.