JPH0334960U

JPH0334960U -

Info

Publication number: JPH0334960U
Application number: JP9529289U
Authority: JP
Priority date: 1989-08-11
Filing date: 1989-08-11
Publication date: 1991-04-05
Also published as: JPH0437018Y2

Description

[Brief explanation of drawings]

図面は本考案の一実施例を示すもので、第１図
はタンデム型負圧ブースタの縦断側面図、第２図
は第１図の矢視図、第３図は組立前の第２図に
対応した説明図、第４図、第５図及び第６図は第
２図の−線、−線及び−線断面図、
第７図は第６図の−線断面図、第８図及び第
９図は第２図の−線及び−線断面図であ
る。Ｂ……負圧ブースタ、１……ブースタシエル、
１ａ，１ｂ……前、後部シエル半体、１ｃ……隔
壁板、２……前記シエル室、３……後部シエル室
、７……後部ダイヤフラム、７ａ……外周ビード
、２７……段部、３０……前部シエル半体の円筒
部、３４，３９……第１、第２フランジ、３６…
…隔壁板の円筒部、４２_１〜４２ｎ……係止爪、
４３_１〜４３ｎ……第１フランジの切欠、４４_１〜４４ｎ……第２フランジの切欠、４５……位置
決め切欠、４６……突片、４９……ストツパ突起
。 The drawings show one embodiment of the present invention; Fig. 1 is a longitudinal cross-sectional side view of a tandem negative pressure booster, Fig. 2 is a view taken in the direction of the arrows in Fig. 1, and Fig. 3 is a diagram showing Fig. 2 before assembly. The corresponding explanatory drawings, FIG. 4, FIG. 5, and FIG. 6 are sectional views taken along lines -, -, and - of FIG.
7 is a cross-sectional view taken along the line -- in FIG. 6, and FIGS. 8 and 9 are cross-sectional views taken along the line -- and -- in FIG. 2. B...Negative pressure booster, 1...Booster shell,
1a, 1b...front and rear shell halves, 1c...partition plate, 2...the shell chamber, 3...rear shell chamber, 7...rear diaphragm, 7a...outer periphery bead, 27...step, 30... Cylindrical portion of front shell half, 34, 39... First and second flanges, 36...
... Cylindrical part of partition plate, 42 ₁ to 42n ... Locking claw,
43 ₁ to 43n...notch of first flange, 44 ₁ ~44n...Notch of second flange, 45...Positioning notch, 46...Protrusion piece, 49...Stopper protrusion.

Claims

[Claims for Utility Model Registration] A bottomed cylindrical front shell half with an open rear end;
A rear shell half that closes the open end of the front shell half is sandwiched between the front and rear shell halves to divide the chamber between the two shell halves into a front shell chamber and a rear shell chamber. A booster shell is formed from a bulkhead plate, and the rear end of the front shell half has an annular step extending radially outward, and a cylindrical portion extending rearward from the outer periphery of the step. First and second flanges that overlap each other within the cylindrical portion and can rotate between a disassembled position and an assembled position are provided on the bulkhead plate and rear shell half, respectively, and a number of notches are formed in the circumferential direction on the periphery of these flanges. A projecting piece formed by cutting down a part of the first flange is penetrated and engaged with a positioning notch provided on the periphery of the second flange so that the notches of both flanges coincide with each other, and the cylindrical part In the disassembled position of both flanges, there are a number of locks that coincide with the plurality of notches to enable fitting and detachment of both flanges to and from the cylindrical part, and in an assembled position, a number of locks that clamp both flanges to the step part. A retaining claw is provided, the outer peripheral bead of the front diaphragm is sandwiched between the front shell half and the partition plate, and the cylindrical portion of the partition plate continuous with the inner peripheral edge of the first flange and the inner peripheral edge of the second flange are provided. In a tandem negative pressure booster, the outer circumferential bead of the rear diaphragm is sandwiched between an annular locking protrusion that protrudes forward and radially outward, and the protrusion is radially outward of the bulkhead plate. A stopper is formed to be warped, and when the flanges are rotated to the assembly position, the stopper contacts a predetermined locking claw and stops both flanges at the assembly position before the locking claw interferes with the protrusion. A tandem negative pressure booster, characterized in that a protrusion is formed on the second flange.