JPS62143880U

JPS62143880U -

Info

Publication number: JPS62143880U
Application number: JP3052186U
Authority: JP
Priority date: 1986-03-05
Filing date: 1986-03-05
Publication date: 1987-09-10

Description

[Brief explanation of the drawing]

第１図は本考案スプール弁の一実施例を示す縦
断面図である。第２図は従来装置の縦断面図であ
る。１……スリーブ、２……スプール、３……ボー
ルねじ、４……モーター、５……中空スプール、
６……中空部、７……ばね、８……サーボピスト
ン、９……中腔、１０……貫通孔、１１……油室
、１２……ニードル弁、１３……給油管、１４…
…電磁弁、１５……給油管、１６……電磁弁、１
７……戻り管。 FIG. 1 is a longitudinal sectional view showing an embodiment of the spool valve of the present invention. FIG. 2 is a longitudinal sectional view of a conventional device. 1... Sleeve, 2... Spool, 3... Ball screw, 4... Motor, 5... Hollow spool,
6...Hollow part, 7...Spring, 8...Servo piston, 9...Medium cavity, 10...Through hole, 11...Oil chamber, 12...Needle valve, 13...Oil supply pipe, 14...
... Solenoid valve, 15 ... Oil supply pipe, 16 ... Solenoid valve, 1
7...Return pipe.

Claims

[Scope of utility model registration request]

A sleeve having an oil supply and oil supply port around the periphery, a spool housed within the sleeve and having a land facing the port on the outer periphery and having a hollow interior, and between one end of the spool and the end of the sleeve. a spring interposed in the spool; a servo piston that is slidably inserted into a hollow portion at the other end of the spool and has a bore whose tip opens into the hollow portion of the spool, and a through hole in the sliding portion; an oil supply system that communicates with an oil chamber formed around the servo piston and constantly supplies hydraulic pressure against the spring, and also supplies high pressure oil when the valve is rapidly actuated;
A spool valve comprising a motor-driven linear movement system connected to the outer end of the servo piston.