JPS62108672U

JPS62108672U -

Info

Publication number: JPS62108672U
Application number: JP20038385U
Authority: JP
Priority date: 1985-12-27
Filing date: 1985-12-27
Publication date: 1987-07-11
Anticipated expiration: 2000-12-27
Also published as: JPH0520936Y2

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例の縦断正面図、第
２図は第１実施例を作動させるパイロツト弁アセ
ンブリの回路構成図、第３図ないし第６図は、第
１実施例によるアクチユエータの速度制御回路図
、第７図は本考案の第２実施例の縦断正面図、第
８図は第２実施例を作動させるパイロツト弁アセ
ンブリの回路構成図、第９図は第２実施例による
アクチユエータの速度制御回路図、第１０図は第
１実施例及び第２実施例を組込んだシリンダ駆動
回路の構成図、第１１図Ａ，Ｂは同上作動の説明
図、第１２図は従来の制御弁の縦断正面図である
。２１，８０……制御弁、２２……本体、２３，
２４，２５……ポート、２６，２７……弁座、３
１，４３……弁体、３２，４４……背室、３５，
４７……ロツド、３６，４８……ピストン、３７
，４９……係止肩、３８……フイードバツク圧力
室、４０，５０，８３……パイロツト圧力室、５
２……調節室、５３……調節機構。 FIG. 1 is a longitudinal sectional front view of a first embodiment of the present invention, FIG. 2 is a circuit diagram of a pilot valve assembly for operating the first embodiment, and FIGS. 3 to 6 are an actuator according to the first embodiment. 7 is a longitudinal sectional front view of the second embodiment of the present invention, FIG. 8 is a circuit diagram of a pilot valve assembly for operating the second embodiment, and FIG. 9 is according to the second embodiment. A speed control circuit diagram of the actuator, Fig. 10 is a configuration diagram of a cylinder drive circuit incorporating the first and second embodiments, Figs. 11A and B are explanatory diagrams of the same operation, and Fig. 12 is a conventional FIG. 3 is a longitudinal sectional front view of the control valve. 21,80...Control valve, 22...Main body, 23,
24, 25... Port, 26, 27... Valve seat, 3
1,43...valve body, 32,44...back chamber, 35,
47... Rod, 36, 48... Piston, 37
, 49... Locking shoulder, 38... Feedback pressure chamber, 40, 50, 83... Pilot pressure chamber, 5
2...Control room, 53...Adjustment mechanism.

Claims

[Claims for Utility Model Registration] First and second valve seats that connect a first port formed in the main body with a second and third port are provided in the main body in a back-to-back position, and these valve seats are opened and closed separately. First thing to do
and in a back chamber defined behind the second valve body,
A spring is compressed to urge each valve element toward each valve seat, and each back chamber is communicated with the first port, and one end of the rod of each valve element is slidably inserted into the main body. one of a pair of pressure chambers defined on both sides of the first piston that opens and closes the first valve body;
The port communicates with the first pilot port, the other of which opens to the outside, and one of a pair of chambers defined on both sides of the second piston that opens and closes the second valve body communicates with the second pilot port, and the other of the chambers communicates with the second pilot port. A control valve characterized in that an adjustment mechanism is provided for regulating the displacement amount of the second piston and adjusting the opening amount of the second valve seat.