JPS61183252U

JPS61183252U -

Info

Publication number: JPS61183252U
Application number: JP6834085U
Authority: JP
Priority date: 1985-05-09
Filing date: 1985-05-09
Publication date: 1986-11-15
Also published as: JPH042842Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示し、第１図は全
体の縦断面図で、第２図―線断面に相当し、
第２図―線断面図、第３、第４図は第１図
および矢視図、第５図は要部の作動説明図であ
る。Ａ，Ｂ……第１、第２作動室、ｂ……内周ビー
ド近傍部分、１……ブースタシエル、２……ブー
スタピストン、２ｂ……円板部、７……ダイヤフ
ラム、７ａ，７ｂ……内、外周ビード、７ｃ……
透孔周辺部、９……入力部材としての入力杆、１
３，１４……透孔、１５……タイロツド、３５…
…筒体、３６……抜止めフランジ、３７……シー
ル部材としての伸縮ブーツ。 Fig. 1 shows an embodiment of the present invention, Fig. 1 is a longitudinal sectional view of the whole, and Fig. 2 corresponds to a cross section taken along the line,
FIG. 2 is a sectional view taken along the line, FIGS. 3 and 4 are views taken from FIG. 1 and arrows, and FIG. A, B...first and second working chambers, b...near the inner peripheral bead, 1...booster shell, 2...booster piston, 2b...disk portion, 7...diaphragm, 7a, 7b... ...Inner, outer bead, 7c...
Peripheral part of the through hole, 9...Input rod as an input member, 1
3,14...Through hole, 15...Tie rod, 35...
... Cylindrical body, 36 ... Removal prevention flange, 37 ... Telescopic boot as a sealing member.

Claims

[Scope of utility model registration request]

A booster piston is housed inside the booster shell so as to be able to reciprocate back and forth, and the inner peripheral bead is bonded to the booster piston by overlapping with the rear surface of the disk portion of the booster piston, and the outer peripheral bead is connected to the peripheral wall of the booster shell. a first working chamber at the front connected to a negative pressure source, and a rear part selectively communicating with the first working chamber or the atmosphere through a control valve interlocked with the input member. The front and rear end walls of the booster shell are connected via a tie rod that passes through both the disc portion of the booster piston and the through holes of the diaphragm, and the booster shell has a second working chamber. interposing a sealing member between the hole and the tie rod;
A negative pressure booster comprising a discharge valve that discharges air from the first working chamber to the second working chamber when the air pressure in the first working chamber becomes higher than a certain value than the air pressure in the second working chamber. In the device, a cylindrical body that fits into the through hole of the diaphragm is provided protrudingly on the rear surface of the disc part,
A retaining flange is provided on the cylindrical body to clamp the peripheral portion of the through hole of the diaphragm in cooperation with the rear surface of the disc portion, except for a portion near the inner peripheral bead of the diaphragm,
A negative pressure booster characterized in that a portion near the inner peripheral bead released from the retaining flange is used as the exhaust valve.