JPS62200873U

JPS62200873U -

Info

Publication number: JPS62200873U
Application number: JP8918186U
Authority: JP
Priority date: 1986-06-11
Filing date: 1986-06-11
Publication date: 1987-12-21

Description

[Brief explanation of the drawing]

第１図は本考案第１実施例の圧力制御弁を示す
断面図、第２図〜第４図は第１実施例制御弁の要
部を示す断面図、第５図は第１実施例制御弁のバ
ルブソレノイドの駆動と制御圧とのタイムチヤー
ト図、第６図は第１実施例制御弁のスプール変位
量と流路面積との関係を示す図、第７図は第１実
施例制御弁の制御電流と制御圧との関係を示す図
、第８図は第２実施例の圧力制御弁の要部を示す
断面図、第９図は従来の圧力制御弁を示す断面図
、第１０図は従来制御弁のバルブソレノイドの駆
動と制御圧とのタイムチヤート図である。１０……バルブ穴、１２……ドレーンポート、
１３……制御圧ポート、１４……ポンプ圧ポート
、１６……制御圧油路、２０……バルブスプール
、３０……バルブソレノイド、４０……制御圧室
、４１……スプリング（弾性体）、５０……チエ
ツク油路、６０……可変オリフイス（可変絞り手
段）。 Fig. 1 is a sectional view showing the pressure control valve of the first embodiment of the present invention, Figs. 2 to 4 are sectional views showing the main parts of the control valve of the first embodiment, and Fig. 5 is the control valve of the first embodiment. A time chart of the drive and control pressure of the valve solenoid of the valve, Fig. 6 is a diagram showing the relationship between the spool displacement amount and flow path area of the control valve of the first embodiment, and Fig. 7 is the control valve of the first embodiment. Figure 8 is a sectional view showing the main parts of the pressure control valve of the second embodiment, Figure 9 is a sectional view showing the conventional pressure control valve, and Figure 10 is a diagram showing the relationship between the control current and control pressure. is a time chart of the drive of the valve solenoid and the control pressure of a conventional control valve. 10...Valve hole, 12...Drain port,
13... Control pressure port, 14... Pump pressure port, 16... Control pressure oil path, 20... Valve spool, 30... Valve solenoid, 40... Control pressure chamber, 41... Spring (elastic body), 50... Check oil path, 60... Variable orifice (variable throttling means).

Claims

[Scope of Claim for Utility Model Registration] A valve hole in which a pump pressure port, a drain port, and a control pressure port are formed, a valve spool provided so as to be displaceable in the axial direction of the valve hole, and one end side of the valve spool. a valve solenoid provided to displace the valve spool; a control pressure chamber provided at the other end of the valve spool in the valve hole; an elastic body disposed within the control pressure chamber; and a control pressure chamber and a control pressure chamber. A check oil passage communicating with a control pressure oil passage from the port, and a throttle means provided in the middle of the check oil passage, and balancing the electromagnetic force of the valve solenoid and the hydraulic pressure from the control pressure chamber. The valve spool is reciprocated around the spool equilibrium position,
In a pressure control valve that controls hydraulic pressure in a control pressure oil passage to a predetermined pressure according to an electromagnetic force, the throttle means has a small flow passage area when the valve spool is near the spool equilibrium position, and the flow passage area is small when the valve spool is near the spool equilibrium position. A pressure control valve characterized by having a variable throttle means that increases the flow path area as the amount of displacement of the spool from the vicinity increases.