JPH01140000U

JPH01140000U -

Info

Publication number: JPH01140000U
Application number: JP3342488U
Authority: JP
Priority date: 1988-03-14
Filing date: 1988-03-14
Publication date: 1989-09-25
Anticipated expiration: 2003-03-14
Also published as: JPH0646639Y2

Description

[Brief explanation of the drawing]

第１図は一部を破断して示した本考案の一実施
例の正面図、第２図は第１図の右側面図、第３図
は液圧回路図と共に示す本考案の一実施例の要部
拡大断面図である。１……フレーム、２……液圧シリンダ、４……
液圧ポンプ、５……貯液タンク、６……間隔、９
……切換弁、１５……シリンダ孔、１７，１８…
…端壁、１９……ピストン、２０……小径部、２
２……固定ピストン、２３……通孔、２４……第
一室、２５……第二室、２６……第三室、２８…
…第一ポート、２９……第三ポート、３０……第
二ポート、３７……逆止め弁付きシーケンス弁、
３９……逆止め弁、Ｐ……供給ポート、Ｒ……戻
りポート、Ａ……第一出力ポート、Ｂ……第二出
力ポート。 Fig. 1 is a partially cutaway front view of an embodiment of the invention, Fig. 2 is a right side view of Fig. 1, and Fig. 3 is an embodiment of the invention shown together with a hydraulic circuit diagram. FIG. 1... Frame, 2... Hydraulic cylinder, 4...
Hydraulic pump, 5...Liquid storage tank, 6...Interval, 9
...Switching valve, 15...Cylinder hole, 17, 18...
...End wall, 19...Piston, 20...Small diameter part, 2
2...Fixed piston, 23...Through hole, 24...First chamber, 25...Second chamber, 26...Third chamber, 28...
...First port, 29...Third port, 30...Second port, 37...Sequence valve with check valve,
39... Check valve, P... Supply port, R... Return port, A... First output port, B... Second output port.

Claims

[Scope of utility model registration request]

A piston with a small diameter portion protruding in the axial direction from one end surface is housed in a cylinder hole so as to be movable in the axial direction, the small diameter portion is passed through an end wall that closes one end of the cylinder hole, and is opened at the other end surface of the piston in the direction of the small diameter portion. A fixed piston protruding in the axial direction from an end wall that closes the other end of the cylinder hole is fitted into a piston hole provided so as to extend, thereby forming a first chamber in the piston hole and a second chamber on the outer periphery of the small diameter portion at one end of the piston. The second chamber and the third chamber on the outer periphery of the fixed piston are defined at the other end of the piston, and the first port is connected to the first chamber through a through hole provided in the fixed piston, and the second chamber is connected to the second chamber. A hydraulic cylinder having a second port and a third port connected to the third chamber is provided on the frame with a tool attached to the tip of the small diameter part of the piston, and a supply port connected to the hydraulic pump in the neutral position. Connect the return port connected to the liquid storage tank, and connect the supply port and the first output port and the return port and the second output port at the switching position from the neutral position to one side, respectively,
At the switching position from the neutral position to the other position, the first output port of the switching valve that connects the supply port and the second output port, and the return port and the first output port, respectively, is connected to the first port of the hydraulic cylinder, and the switching valve The second output port of the switching valve is connected to the second port of the hydraulic cylinder, and the valve is equipped with a check valve that allows free flow from the third port side between the first output port of the switching valve and the third port of the hydraulic cylinder. Connected via a sequence valve, the third port of the hydraulic cylinder and the liquid storage tank are connected via a check valve that allows free flow from the liquid storage tank side, and there is a gap between the liquid storage tank and the frame. A hydraulically operated pressurized processing machine mounted on a frame and arranged so as to have a