JPH0483964U

JPH0483964U -

Info

Publication number: JPH0483964U
Application number: JP12768090U
Authority: JP
Priority date: 1990-11-30
Filing date: 1990-11-30
Publication date: 1992-07-21
Anticipated expiration: 2005-11-30
Also published as: JP2519245Y2

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示すタンデム型負圧
ブースタの縦断側面図である。Ｂ……負圧ブースタ、Ｍ……ブレーキマスタシ
リンダ、１……ブースタシエル、１ｃ……隔壁板
、２……前部シエル室、２ａ……前部負圧室、２
ｂ……前部作動室、３……後部シエル室、３ａ…
…後部負圧室、３ｂ……後部作動室、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、１０……ピストンボス、１３……戻しばね
、１４……負圧導入管、１５……弁筒、２０……
第１ポート、２１……第２ポート、２１ａ……主
流路、２１ｂ，２１ｃ……前、後部分岐流路、２
２……制御弁、２３……大気導入口、２５……入
力杆、４３……出力杆。 The drawing is a longitudinal sectional side view of a tandem negative pressure booster showing an embodiment of the present invention. B... Negative pressure booster, M... Brake master cylinder, 1... Booster shell, 1c... Partition plate, 2... Front shell chamber, 2a... Front negative pressure chamber, 2
b...Front working chamber, 3...Rear shell chamber, 3a...
... Rear negative pressure chamber, 3b ... Rear working chamber, 4 ... Front booster piston, 5 ... Front diaphragm, 6
... Rear booster piston, 7 ... Rear diaphragm, 10 ... Piston boss, 13 ... Return spring, 14 ... Negative pressure introduction pipe, 15 ... Valve cylinder, 20 ...
1st port, 21...2nd port, 21a...main flow path, 21b, 21c...front, rear branch flow path, 2
2... Control valve, 23... Atmospheric inlet, 25... Input rod, 43... Output rod.

Claims

[Claims for Utility Model Registration] A partition plate 1c is fixedly installed in the booster shell 1 to partition the interior thereof into a front shell chamber 2 and a rear shell chamber 3, and the front shell chamber 2 is connected to a front side connected to a negative pressure source. The front booster piston 4 is divided into a front negative pressure chamber 2a and a rear front working chamber 2b, and the rear shell chamber 3 is divided into a front rear negative pressure chamber 3a and a rear rear working chamber 3b. The rear booster piston 6 is connected to the rear booster piston 6 via a piston boss 10 that is slidably supported by the partition wall plate 1c and is connected to the output rod 43, and is connected to the rear wall of the booster shell 1 that protrudes from the rear end of the piston boss 10. A valve cylinder 15 that is slidably supported by the valve cylinder 15 is integrally connected to the valve cylinder 15, and a first port 20 that communicates the inside of the valve cylinder 15 with both the negative pressure chambers 2a and 3a, and a first port 20 that communicates the inside of the valve cylinder 15 with both the negative pressure chambers 2a and 3a. 2b and 3b, and an input rod 25 that can move back and forth is provided in the valve cylinder 15, and the second port 21 is connected to the first port 20 and the atmosphere according to the back and forth movement of the input rod 25. In the tandem negative pressure booster, the second port 21 is connected to a main flow passage 21a extending radially outward from the inner circumferential surface of the valve cylinder 15, and a control valve 22 that communicates with the main flow passage 21.
A tandem-type negative pressure booster characterized by comprising front and rear branch flow passages 21b and 21c which are divided into front and rear parts from the outer end of the cylinder a and open into front and rear working chambers 2b and 3b, respectively.