JPS63108854U

JPS63108854U -

Info

Publication number: JPS63108854U
Application number: JP51787U
Authority: JP
Priority date: 1987-01-06
Filing date: 1987-01-06
Publication date: 1988-07-13
Also published as: JPH0411901Y2

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，ｃ…前面、Ｓ
…空間、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、４６ａ…係合片
連設部、４７…挟止板本体、４９_１，４９_２…第
１、第２係合片。 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 directional view of 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, c...front, S
... Space, 1 ... Booster shell, 2 ... Booster piston, 6 ... Control valve, 12 ... Valve cylinder, 38 ... Valve cylinder fitting hole, 40 ... Removal prevention flange, 43 ₁ , 43 ₂ ... First and second locking claws , 46...Pinch plate, 46a...Engagement piece connecting portion, 47...Pinch plate main body, 49 ₁ , 49 ₂ ...First and second engagement pieces.

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 valve sleeve for a control valve that is fitted and has a retaining flange superimposed on the front surface of the booster piston; A clamp having a stop plate main body and a plurality of engagement pieces connected to the stop plate main body so as to protrude outward in the radial direction of the retaining flange and elastically engage with the plurality of locking claws of the booster piston. In a negative pressure booster equipped with a stop plate, a space is provided between the front outer circumferential portion of the retaining flange and each engaging piece connecting portion of the retaining plate main body facing thereto. Features a negative pressure booster.