JPS60142155U

JPS60142155U - master cylinder

Info

Publication number: JPS60142155U
Application number: JP2987684U
Authority: JP
Inventors: 浩司山本; 竹内　裕明
Original assignee: アイシン精機株式会社
Priority date: 1984-02-29
Filing date: 1984-02-29
Publication date: 1985-09-20
Also published as: JPH0338051Y2

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 drawings]

第１図は従来のマスクシリンダの一部断面図、第２図は
本考案に係るマスクシリンダの一実施例の断面図、およ
び第３図は第２図Ａ部の拡大断面図である。１０・・・ボディ、１０ａ・・・ボア大径部、１０ｂ・
・・ボア小径部、１０ｄ・・・接続口、１１・・・ピス
トン、１１ａ・・・ピストン大径部、１１ｂ・・・ピス
トン小径部、１７・・・第１圧力室、１８・・・第２圧
力室、２９・・・通孔、３０・・・補償孔、４０・・・
第１バルブ、４１　。・・・環状プレート、４２・・・シール部材、４３・・
・バルブ体、４３ａ・・・バルブ体のフランジ部、４５
・・・ス　、プリング、５０・・・第２バルブ、７０・
・・常開絞り通路。FIG. 1 is a partial sectional view of a conventional mask cylinder, FIG. 2 is a sectional view of an embodiment of the mask cylinder according to the present invention, and FIG. 3 is an enlarged sectional view of section A in FIG. 10...Body, 10a...Bore large diameter part, 10b.
... Bore small diameter part, 10d... Connection port, 11... Piston, 11a... Piston large diameter part, 11b... Piston small diameter part, 17... First pressure chamber, 18... No. 2 pressure chamber, 29... through hole, 30... compensation hole, 40...
First valve, 41. ...Annular plate, 42...Seal member, 43...
・Valve body, 43a...flange part of valve body, 45
... spring, 50... second valve, 70.
...Never-open aperture passage.

Claims

[Scope of utility model registration request]

A bore is formed in the cylinder body, and a piston having a large diameter part and a small diameter part is slidably fitted in the bore, so that first pressure chambers are formed in the large diameter part and the small diameter part of the bore, respectively. and an outlet, and further a connection port with a reservoir is provided near the boundary between the large diameter part and the small diameter part of the bore, and a bottom surface of the connection port is connected to the first pressure chamber. A communication hole communicating with the second pressure chamber and a compensation hole communicating with the second pressure chamber are provided, and a cup seal mounted on a small diameter portion of the piston closes the second pressure chamber and the compensation hole when the piston moves forward. A first valve opens to allow liquid to flow from the reservoir into the first pressure chamber when the first pressure chamber tends to have a negative pressure during the backward movement of the piston; A second valve that opens when the pressure in the first pressure chamber exceeds a predetermined value and releases liquid from the first pressure chamber to the reservoir is disposed within the connection port, and is connected to the first pressure chamber and the second valve. In a mask cylinder which is communicated with a reservoir through a normally open throttle passage, an annular plate is fixed in the connection port, a valve body housing the second valve is disposed concentrically with the plate, and the valve body is arranged concentrically with the plate. A spring is stretched between the upper part of the body and the upper part of the plate, the sealing member fixed to the lower part of the plate and the upper surface of the flange part of the valve body constitute the first valve, and the normally open A mask cylinder in which a throttle passage is formed to pass through the flange portion in the axial direction.