JPH0419945U

JPH0419945U -

Info

Publication number: JPH0419945U
Application number: JP6199790U
Authority: JP
Priority date: 1990-06-12
Filing date: 1990-06-12
Publication date: 1992-02-19

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す断面図、第２図
はその要部部品の断面図、第３図は第２実施例を
示す要部部品の断面図、第４図は従来例を示す断
面図である。１……ケース、１ａ……上壁、２……嵌合孔、
３……上部リテーナ、４……下部リテーナ、５…
…止めリング、６〜８……第１〜第３シリンダ孔
、９……段付きピストン、９ａ……第１ピストン
、９ｂ……第２ピストン、９ｃ……凹部、１０…
…カラー、１０ａ……主体、１０ｂ……フランジ
、１０ｃ……外周部、１２……第３ピストン、１
３〜１６……第１〜第４油室、１８……ステム、
１８ａ……上部、１８ｂ……下部、１８ｃ……規
制壁、２０……上部リターンスプリング、２１…
…下部リターンスプリング、２２……ばね受け、
２５〜２８……第１〜第４連通孔、２９〜３１…
…制御油路、３２……ドレン油路。 Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view of its main parts, Fig. 3 is a sectional view of main parts showing the second embodiment, and Fig. 4 is a sectional view of a conventional example. FIG. 1... Case, 1a... Upper wall, 2... Fitting hole,
3... Upper retainer, 4... Lower retainer, 5...
...Retaining ring, 6-8...First to third cylinder holes, 9...Stepped piston, 9a...First piston, 9b...Second piston, 9c...Recess, 10...
... Collar, 10a ... Main body, 10b ... Flange, 10c ... Outer circumference, 12 ... Third piston, 1
3 to 16...1st to 4th oil chambers, 18...stem,
18a... Upper part, 18b... Lower part, 18c... Regulation wall, 20... Upper return spring, 21...
...lower return spring, 22...spring receiver,
25 to 28...first to fourth communication holes, 29 to 31...
...Control oil path, 32...Drain oil path.

Claims

[Scope of utility model registration request]

A retainer having cylinder holes of different diameters is fitted and fixed to the case, a piston formed of a synthetic resin material with different diameters is slidably fitted to the retainer, and one end surface of the piston is housed in the case. In a piston of a hydraulic servo mechanism whose one end is in contact with a regulating wall of a stem provided at the axial center of the case, a metal collar formed in a disk shape is integrally fixed to one end surface of the piston, A piston of a hydraulic servo mechanism, characterized in that the collar is brought into contact with one end of the return spring and a regulating wall of a stem.