JPH0194164U

JPH0194164U -

Info

Publication number: JPH0194164U
Application number: JP19127487U
Authority: JP
Priority date: 1987-12-16
Filing date: 1987-12-16
Publication date: 1989-06-21
Anticipated expiration: 2002-12-16
Also published as: JP2530335Y2

Description

[Brief explanation of the drawing]

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休止状態での縦断側
面図、第２図及び第３図は第１図の―線及び
―線断面図、第４図は同負圧ブースタが作動
を終えて休止状態に戻る直前の状態を示す部分縦
断側面図、第５図は同負圧ブースタにおける空気
分散部材周りの分解斜視図、第６図は空気分散部
材の変形例を示す、第５図と同様の分解斜視図で
ある。Ｂ……負圧ブースタ、１……ブースタシエル、
２ａ，３ａ……負圧室、２ｂ，３ｂ……作動室、
４，６……前部ブースタピストン、１０……ボス
部としてのピストンボス、２５……弁筒、３０…
…第１ポート、３１……第２ポート、３２……制
御弁、３３……大気導入口、３５……入力杆、５
３……出力杆、７０……空気分散部材。 The drawings show one embodiment of the present invention, and FIG. 1 is a vertical sectional side view of a tandem negative pressure booster in a rest state, and FIGS. 2 and 3 are sectional views taken along lines - and - in FIG. 1. , FIG. 4 is a partial longitudinal sectional side view showing the state of the negative pressure booster immediately before it returns to the rest state after completing its operation, FIG. 5 is an exploded perspective view of the area around the air distribution member in the negative pressure booster, and FIG. 6 is FIG. 6 is an exploded perspective view similar to FIG. 5, showing a modification of the air dispersion member. B...Negative pressure booster, 1...Booster shell,
2a, 3a... negative pressure chamber, 2b, 3b... working chamber,
4, 6...Front booster piston, 10...Piston boss as a boss portion, 25...Valve cylinder, 30...
...First port, 31...Second port, 32...Control valve, 33...Atmospheric inlet, 35...Input rod, 5
3... Output rod, 70... Air dispersion member.

Claims

[Scope of utility model registration request]

A negative pressure chamber and an operating chamber are respectively formed on the front and rear sides of the booster piston housed in the booster shell, and the boss portion of the booster piston has a valve cylinder that is slidably supported on the rear wall of the booster shell. A first port that connects the inside of the valve cylinder to the negative pressure chamber and a second port that connects the inside of the valve cylinder to the working chamber are provided, and the valve cylinder has an input rod that can move back and forth; In a negative pressure booster equipped with a control valve that switches the second port to communicate with the first port and the atmosphere inlet at the rear of the valve cylinder according to the forward and backward movement of the input rod, a large amount of circulating air is supplied into the valve cylinder. A negative pressure booster, characterized in that an annular air dispersion member capable of being dispersed in a direction is disposed opposite to an open end of a second port.