JPS60137662U

JPS60137662U - master cylinder

Info

Publication number: JPS60137662U
Application number: JP2621984U
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: 1984-02-24
Filing date: 1984-02-24
Publication date: 1985-09-12

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

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、１０１・・・・・・接続口のテーパー状肩部
、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、４
０・・・・・・第１バルブ、４１・・・・・・シール部
材、４１ｃ・・・・・・シール部材の遊端部、４１ｅ・
・・・・・シール部材の肩部、５１・・・・・・ハウジ
ンク、５１　ｅ・・・・・・ボア、５１ｆ・・・・・・
オリフィス、５１１・・・・・・穴、５３　”””スプ
リング、６１・・・・・・プレート。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, 101...Tapered shoulder of connection port, 11...Piston, 11a...Piston large diameter part, 11b---Piston small diameter part , 17
......First pressure chamber, 18...Second pressure chamber, 29...Through hole, 30...Compensation hole, 4
0...First valve, 41...Seal member, 41c...Free end of seal member, 41e.
...Shoulder of seal member, 51 ...Housing, 51 e ...Bore, 51f ...
Orifice, 511... Hole, 53 ``'''' Spring, 61... Plate.

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 inside the bore, so that the first piston is fitted into the large diameter part and the small diameter part of the bore, respectively. forming a second pressure chamber with a pressure chamber and an outlet;
Furthermore, a connection port with the reservoir is provided near the boundary between the large diameter portion and the small diameter portion of the bore, and a through hole communicating with the first pressure chamber and a compensation hole communicating with the second pressure chamber are provided on the bottom surface of the connection port. 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, and closes the second pressure chamber and the compensation hole when the piston moves backward. A first valve that opens when the pressure in the first pressure chamber tends to be negative and allows liquid to flow from the reservoir to the first pressure chamber, and when the pressure in the first pressure chamber exceeds a predetermined value during forward movement toward the piston. In a mask cylinder in which a second valve that opens and releases liquid from the first pressure chamber to the reservoir is disposed in the connection port, the connection port is stepped so that the second valve opens and releases the liquid from the first pressure chamber to the reservoir side. A large diameter part and a small diameter part are formed on the pressure chamber side, and a tapered shape is formed between the large diameter part and the small diameter part, and an appropriate number of bores and orifices are formed in the axial direction and perpendicular to the bore. A housing in which a hole is formed in the radial direction, and a seal member fitted on the outer periphery of the housing are disposed in the connection port, and when the housing is urged downward by a spring, the seal member The second valve is configured such that a shoulder of the seal member is in sealing alignment with a shoulder of the connection port, and a free end extends downward from the shoulder of the seal member along the outer periphery of the housing. The mask cylinder comprises the first valve configured to open and close the radial hole of the housing.