JPH0224106U

JPH0224106U -

Info

Publication number: JPH0224106U
Application number: JP9818088U
Authority: JP
Priority date: 1988-07-25
Filing date: 1988-07-25
Publication date: 1990-02-16
Anticipated expiration: 2003-05-24
Also published as: JPH0519601Y2

Description

[Brief explanation of the drawing]

第１図は本考案一実施例の圧力制御弁示す断面
図、第２図は実施例制御弁の作動を示す断面図、
第３図は実施例制御弁を適用した装置のシステム
を示す全体図、第４図は従来のストローク量変化
に対する制御液圧変化を示すグラフである。Ａ……圧力制御弁、１０……バルブボデイ、２
０……バルブスプール、２３……第１ランド、２
４……第２ランド、３０……第１ソレノイド、４
０……第２ソレノイド、６１……バルブ穴、６２
……液圧導入穴、６３……第１ドレーン穴、６４
……第２ドレーン穴、６５……第１制御圧ポート
、６６……第２制御圧ポート、７０……第１ピス
トン孔、７１……第１パイロツトピストン、７２
……第１フイードバツク液圧孔、７３……フイル
タ、８０……第２ピストン孔、８１……第２パイ
ロツトピストン、８２……第２フイードバツク液
圧孔、８３……フイルタ。 FIG. 1 is a sectional view showing a pressure control valve according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the operation of the embodiment control valve.
FIG. 3 is an overall diagram showing a system of an apparatus to which the embodiment control valve is applied, and FIG. 4 is a graph showing changes in control hydraulic pressure with respect to changes in conventional stroke amount. A...Pressure control valve, 10...Valve body, 2
0...Valve spool, 23...1st land, 2
4...Second land, 30...First solenoid, 4
0...Second solenoid, 61...Valve hole, 62
... Hydraulic pressure introduction hole, 63 ... First drain hole, 64
...Second drain hole, 65...First control pressure port, 66...Second control pressure port, 70...First piston hole, 71...First pilot piston, 72
...First feedback hydraulic hole, 73...Filter, 80...Second piston hole, 81...Second pilot piston, 82...Second feedback hydraulic hole, 83...Filter.

Claims

[Claims for Utility Model Registration] A valve body having a valve hole in which a first control pressure port, a second control pressure port, a hydraulic pressure introduction hole, and a drain hole are formed; The hydraulic pressure introduced into the hydraulic pressure introduction hole is transferred to the first control pressure port and the second control pressure port.
A valve spool is formed with a land that is inversely proportional to the control pressure port, and a land is provided on the valve body at both ends of the valve spool, and the valve spool is pushed by a plunger according to electromagnetic force to increase the first control pressure port. a first solenoid that slides in the pressure direction; a second solenoid that slides in the pressure increasing direction of the second control pressure port; formed at one end of the valve spool and provided in contact with the plunger of the second solenoid; a first piston hole into which a first pilot piston is slidably inserted; and a second pilot piston formed at the other end of the valve spool and in contact with the plunger of the first solenoid. a second piston hole into which the hydraulic pressure of the first control pressure port can be introduced, a first feedback hydraulic pressure hole formed so that hydraulic pressure of the first control pressure port can be introduced into the first piston hole; A second feedback hydraulic hole formed to be able to introduce the hydraulic pressure of the port; and a dense filter inserted in a direction perpendicular to the axis of both piston holes and provided in each of the feedback hydraulic holes. A pressure control valve characterized by: