JPS5949570U

JPS5949570U - master cylinder

Info

Publication number: JPS5949570U
Application number: JP14661682U
Authority: JP
Inventors: 森　善典; 大見　厚志; 竹内　裕明
Original assignee: アイシン精機株式会社
Priority date: 1982-09-27
Filing date: 1982-09-27
Publication date: 1984-04-02

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案に係るマスクシリンダの一実施例を示す
縦断面図、第２図は同マスクシリンダにおける逆止弁組
付部を示す拡大部分縦断面図、第３図は同逆止弁組付部
の凌形例を示す拡大部分縦断面図、第４図は従来のマス
クシリンダにおける逆止弁組付部の縦断面図である。符号の説明、１０・・・シリンダボデー、１１ａ。１１ｂ・・・段付シリンダ、１２・・・第１筒状取付部
、１２ａ・・・連通孔、１２ｂ・・・内孔、１２Ｃ・・
・補償孔、１６・・・弾性部材、２１・・・プライマリ
ピストン、２２・・・カセンダリピストン、２７ａ、２
７ｂ・・・ピストンカップ、３０・・・リザーバ、３１
・・・第１筒状接合部、４０ａ・・・逆止弁、４０ｂ・
・・ＩＪ　ＩＪ−フ弁、４１・・・弁座部材、４１ａ・
・・弁座部、４２・・・筒状弁一体、４３・・・スティ
ック、Ｒ１・・・第１圧力室、Ｒ２・・・第２圧力室。Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the mask cylinder according to the present invention, Fig. 2 is an enlarged partial longitudinal cross-sectional view showing the check valve assembly part in the mask cylinder, and Fig. 3 is a longitudinal cross-sectional view of the same check valve. FIG. 4 is an enlarged partial vertical cross-sectional view showing an example of the assembly part, and FIG. 4 is a vertical cross-sectional view of the check valve assembly part in a conventional mask cylinder. Explanation of symbols: 10... Cylinder body, 11a. 11b...Stepped cylinder, 12...First cylindrical attachment part, 12a...Communication hole, 12b...Inner hole, 12C...
- Compensation hole, 16... Elastic member, 21... Primary piston, 22... Secondary piston, 27a, 2
7b...Piston cup, 30...Reservoir, 31
...First cylindrical joint portion, 40a...Check valve, 40b.
... IJ IJ-fu valve, 41... Valve seat member, 41a.
... Valve seat portion, 42 ... Cylindrical valve integrated, 43 ... Stick, R1 ... First pressure chamber, R2 ... Second pressure chamber.

Claims

[Scope of utility model registration request]

A cylinder body having a stepped cylinder and a cylindrical mounting portion into which a cylindrical joint provided on the reservoir is fitted and fixed; A first pressure chamber is formed in which a communication hole that communicates with the inner hole of the cylindrical attachment part opens on the diameter side, and a compensation hole and a wheel cylinder that communicate with the inner hole of the cylindrical attachment part on the small diameter side. A stepped piston forming a second pressure chamber with an open port connected to the stepped piston is attached to the stepped piston, and when the stepped piston is operated, communication between the second pressure chamber and the compensation hole is cut off, and a gap between the surface pressure chambers is established. a piston cup that allows liquid to flow from the first pressure chamber to the second pressure chamber due to a pressure difference; A mask cylinder comprising a relief valve for regulating and a check valve for regulating liquid backflow from the first pressure chamber to the reservoir, wherein the check valve is fitted into the cylindrical joint of the reservoir and A valve seat made of a cylindrical elastic material that is fitted into the inner hole of the cylindrical mounting portion of the cylinder body and is liquid-tightly fixed to the outer periphery of the cylindrical joint portion and the inner periphery of the cylindrical mount portion. a valve body which is elastically seated from below on a valve seat provided at the lower end of the valve seat member by the biasing force of a spring; A mask cylinder comprising: a stick that faces the first pressure chamber through a communication hole and contacts the stepped portion of the stepped piston when the stepped piston is not in operation to tilt the valve body.