JPH0481868U

JPH0481868U -

Info

Publication number: JPH0481868U
Application number: JP12535990U
Authority: JP
Priority date: 1990-11-28
Filing date: 1990-11-28
Publication date: 1992-07-16
Anticipated expiration: 2005-11-28
Also published as: JP2519244Y2

Description

[Brief explanation of the drawing]

第１図および第２図は本考案の一実施例を示す
ものであり、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−線断面図、
第３図は本考案の他の実施例のタンデム型負圧ブ
ースタの縦断側面図である。１……ブースタシエル、１ｃ……隔壁板、２…
…前部シエル室、３……後部シエル室、４……前
部ブースタピストン、５……前部ダイヤフラム、
６……後部ブースタピストン、７……後部ダイヤ
フラム、７ａ……内周ビード、８，８′……ピス
トンボス、１２，１２′……連結筒、１２ａ，１
２ａ′……前部係合部、１２ｂ，１２ｂ′……後
部係合部、１４……シール部材、１７……ストツ
パ、４７……出力杆、Ｂ……タンデム型負圧ブー
スタ。 1 and 2 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional side view of a tandem negative pressure booster, FIG. 2 is a sectional view taken along the line -- in FIG.
FIG. 3 is a longitudinal sectional side view of a tandem negative pressure booster according to another embodiment of the present invention. 1... Booster shell, 1c... Partition plate, 2...
...Front shell chamber, 3...Rear shell chamber, 4...Front booster piston, 5...Front diaphragm,
6... Rear booster piston, 7... Rear diaphragm, 7a... Inner peripheral bead, 8, 8'... Piston boss, 12, 12'... Connection cylinder, 12a, 1
2a'... Front engaging portion, 12b, 12b'... Rear engaging portion, 14... Seal member, 17... Stopper, 47... Output rod, B... Tandem type negative pressure booster.

Claims

[Scope of utility model registration request]

The booster shell 1 is provided with a partition plate 1c that partitions the inside thereof into a front shell chamber 2 and a rear shell chamber 3, and includes a front booster piston 4 with a front diaphragm 5 superimposed on the rear surface thereof, and a rear diaphragm 7. In a tandem type negative pressure booster, a rear booster piston 4 having a rear booster piston 4 which is superimposed and bonded to the rear surface is slidably supported on the partition wall plate 1c and connected via piston bosses 8 and 8' connected to the output rod 47. ,
Front engaging portions 12a, 12a' that engage with the piston bosses 8, 8' from the front side and piston bosses 8, 8'
A cylindrical connecting cylinder 12, 12' extending rearward and having a plurality of rear engaging portions 12b, 12b' that can be bent to engage from the rear side is connected to the center part of the front booster piston 4. The inner peripheral bead 7a of the rear diaphragm 7 which is provided and wraps around the inner peripheral edge of the rear booster piston 6 is connected to the rear engaging portions 12b, 12b.
A stopper 17 is engaged with the piston bosses 8, 8' from behind with the inner peripheral bead 7a interposed therebetween, and a stopper 17 is engaged with the piston bosses 8, 8' to spring the inner peripheral bead 7a forward. section and connecting tubes 12, 12
A tandem negative pressure booster characterized in that a sealing member 14 is interposed between the outer surface of the tandem negative pressure booster and the outer surface of the tandem negative pressure booster.