JPS6215602U

JPS6215602U -

Info

Publication number: JPS6215602U
Application number: JP10663685U
Authority: JP
Priority date: 1985-07-12
Filing date: 1985-07-12
Publication date: 1987-01-30

Description

[Brief explanation of the drawing]

第１図はこの考案の差圧制御装置の一実施例を
示す断面図、第２図はその差圧制御装置の動作を
説明するタイムチヤート、第３図は上記差圧制御
装置の応用例を示す構成図である。１……油ポンプ、２……油タンク、３……油圧
シリンダ、４……ピストン、５……ピストンロツ
ド、１０……差圧制御装置、１１……本体、１２
……インレツトポート、１３……ドレインポート
、１４ａ，１４ｂ……アウトレツトポート、１６
……スリーブ、１７……スプール、２２ａ，２２
ｂ……パイロツト圧力室、２３ａ，２３ｂ……圧
縮ばね、２４ａ，２４ｂ……フイードバツク圧力
室、２５ａ，２５ｂ……制御ポート、３５ａ，３
４ｂ……電磁弁、３６ａ，３６ｂ……プランジヤ
、３７ａ，３７ｂ……圧縮ばね、３８……ソレノ
イド、３９ａ，３９ｂ……駆動回路、４１ａ，４
１ｂ……空洞部、４３……バネ上質量、４４……
バネ下質量、４６……サスペンシヨン装置、４７
……コイルスプリング、４８……コントローラ、
Ａ……ピストン上室、Ｂ……ピストン下室。 Fig. 1 is a sectional view showing an embodiment of the differential pressure control device of this invention, Fig. 2 is a time chart explaining the operation of the differential pressure control device, and Fig. 3 is an application example of the differential pressure control device. FIG. DESCRIPTION OF SYMBOLS 1...Oil pump, 2...Oil tank, 3...Hydraulic cylinder, 4...Piston, 5...Piston rod, 10...Differential pressure control device, 11...Main body, 12
...Inlet port, 13...Drain port, 14a, 14b...Outlet port, 16
...Sleeve, 17...Spool, 22a, 22
b...Pilot pressure chamber, 23a, 23b...Compression spring, 24a, 24b...Feedback pressure chamber, 25a, 25b...Control port, 35a, 3
4b... Solenoid valve, 36a, 36b... Plunger, 37a, 37b... Compression spring, 38... Solenoid, 39a, 39b... Drive circuit, 41a, 4
1b...Cavity part, 43...Spring mass, 44...
Unsprung mass, 46...Suspension device, 47
...Coil spring, 48...Controller,
A... Piston upper chamber, B... Piston lower chamber.

Claims

[Scope of utility model registration request]

an inlet port connected to a fluid pressure source;
A differential pressure control device comprising: a drain port connected to a fluid tank; and two outlet ports whose differential pressure is controlled; a sleeve fixed inside the main body; a control port formed between the sleeve and the spool that selectively communicates the outlet port with the inlet port or the drain port as the spool slides; a pilot pressure chamber formed on both end surfaces of the spool inside the sleeve; a feedback pressure chamber that communicates with the outlet port and formed near both ends of the spool inside the sleeve; the pilot pressure chamber A differential pressure control device comprising: a solenoid valve that selectively communicates with the inlet port or the outlet port and is capable of adjusting the pressure of the pilot pressure chamber.