JPS63108855U

JPS63108855U -

Info

Publication number: JPS63108855U
Application number: JP51887U
Authority: JP
Priority date: 1987-01-06
Filing date: 1987-01-06
Publication date: 1988-07-13
Anticipated expiration: 2002-01-06
Also published as: JPH0745395Y2

Description

[Brief explanation of the drawing]

図面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図は第１図―矢視図、第３図は第２図―
線断面図、第４図はブースタピストンに対する
弁筒の組付け部分の拡大縦断面図で、ａはブース
タピストンが撓む前の状態を、ｂはブースタピス
トンが撓んだ状態をそれぞれ示す。Ａ，Ｂ…第１、第２作動室、ｂ…前面、ｄ…間
隔、１…ブースタシエル、２…ブースタピストン
、６…制御弁、１２…弁筒、３８…弁筒嵌入孔、
４０…抜止めフランジ、４３_１，４３_２…第１、
第２係止爪、４６…挟止板、５８…逃げ、５８ａ
…当接面、５９…補強リブ。 The drawings show one embodiment of the present invention, FIG. 1 is a longitudinal sectional view of the whole, FIG. 2 corresponds to a line cross section, FIG. 2 is a view taken from FIG. figure-
The line sectional view and FIG. 4 are enlarged longitudinal sectional views of the part where the valve cylinder is assembled to the booster piston, where a shows the state before the booster piston is bent, and b shows the state where the booster piston is bent. A, B...first and second working chambers, b...front, d...distance, 1...booster shell, 2...booster piston, 6...control valve, 12...valve cylinder, 38...valve cylinder fitting hole,
40... retaining flange, 43 ₁ , 43 ₂ ... first,
Second locking claw, 46...Pinching plate, 58...Escape, 58a
...Abutment surface, 59...Reinforcement rib.

Claims

[Scope of utility model registration request]

a booster shell; a first working chamber connected to a negative pressure source within the booster shell;
a booster piston housed in the booster shell so as to be able to reciprocate back and forth so as to be partitioned into a working chamber or a second working chamber that selectively communicates with the atmosphere; A control valve valve cylinder that is fitted and has a retaining flange superimposed on the front surface of the booster piston; rotates around the center line of the retaining flange in order to cooperate with and clamp the retaining flange with the booster piston; and a clamping plate that elastically engages with a plurality of locking pawls of the booster piston; in the negative pressure booster, a clamping plate is provided around the entire rear outer circumference of the retaining flange and is spaced apart from the front surface of the booster piston. A recess having an abutment surface is formed in a portion of the booster piston facing the abutment surface, and when the amount of forward deflection of the booster piston increases, the booster piston comes into contact with the abutment surface and deflects the amount of deflection. 1. A negative pressure booster characterized in that a reinforcing rib for regulating the pressure is disposed at a distance from the contact surface.