JPH01128004U

JPH01128004U -

Info

Publication number: JPH01128004U
Application number: JP2411488U
Authority: JP
Priority date: 1988-02-25
Filing date: 1988-02-25
Publication date: 1989-08-31

Description

[Brief explanation of the drawing]

第１図はこの考案によるアクチユエータの一実
施例を示す断面図、第２図は第１図のものの作動
特性を示すグラフ、第３図は従来のアクチユエー
タの一例を示す断面図、第４図は第３図のものの
作動特性を示すグラフ、第５図は従来のアクチユ
エータの他の例を示す断面図、第６図は第５図の
ものの作動特性を示すグラフである。１……ロアーケース、２……アツパーケース、
３……かしめ部、４，２４，４４……ダイアフラ
ム、４ａ……内側ダイアフラム部分、４ｂ……外
側ダイアフラム部分、５，６……リテーナ、７，
２７，４７……ロツド、８……軸シール、９……
ロアーリテーナ、１０……アツパーリテーナ、１
１……内側ダイアフラム室、１２……内側スプリ
ング、１３……外側ダイアフラム室、１４……外
側スプリング、１５……通気孔、１６，３６，５
６，６０……通気管、２１，４１……ケース、２
８……軸受、３３，５３……ダイアフラム室、３
４，５４……スプリング、５７……バルブ、５８
……バルブハウジング、５９……バルブ室。 Fig. 1 is a sectional view showing an embodiment of the actuator according to this invention, Fig. 2 is a graph showing the operating characteristics of the actuator shown in Fig. 1, Fig. 3 is a sectional view showing an example of the conventional actuator, and Fig. 4 is a sectional view showing an example of the actuator according to the invention. FIG. 3 is a graph showing the operating characteristics of the actuator shown in FIG. 5, FIG. 5 is a sectional view showing another example of the conventional actuator, and FIG. 6 is a graph showing the operating characteristics of the actuator shown in FIG. 1...Lower case, 2...Upper case,
3... Caulking part, 4, 24, 44... Diaphragm, 4a... Inner diaphragm part, 4b... Outer diaphragm part, 5, 6... Retainer, 7,
27, 47... Rod, 8... Shaft seal, 9...
Lower retainer, 10... Atsupa retainer, 1
1...Inner diaphragm chamber, 12...Inner spring, 13...Outer diaphragm chamber, 14...Outer spring, 15...Vent hole, 16, 36, 5
6, 60... Ventilation pipe, 21, 41... Case, 2
8... Bearing, 33, 53... Diaphragm chamber, 3
4, 54...Spring, 57...Valve, 58
...Valve housing, 59...Valve chamber.

Claims

[Scope of utility model registration request]

In an actuator in which a rod 7 is attached to the center of a single diaphragm 4 whose peripheral portions are fixed to cases 1 and 2, and the rod 7 is moved forward and backward by applying air pressure within the cases 1 and 2. , dividing the diaphragm 4 into a plurality of diaphragm parts 4a and 4b along the radial direction,
Diaphragm chambers 11 and 13 are formed in each of the diaphragm portions 4a and 4b, and these diaphragm chambers 11 and 13 are communicated through a ventilation hole 15, so that the diaphragm chambers 11 and 13 are applied with different urging forces. An actuator characterized in that biasing members 12 and 14 are respectively provided.