JPS62127062U

JPS62127062U -

Info

Publication number: JPS62127062U
Application number: JP1475286U
Authority: JP
Priority date: 1986-02-04
Filing date: 1986-02-04
Publication date: 1987-08-12
Also published as: JPH049251Y2

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
は縦断面図、第２図は第１図矢示―線視図、
第３図はダイヤフラムの部分斜視図、第４図は第
１図の要部拡大図、第５図は第４図―線断面
図、第６図は弁ピストンの拡大斜視図である。Ｓ……負圧式倍力装置、Ａ……第１作動室、Ｂ
……第２作動室、Ｃａ……入力杆結合部としての
かしめ結合部、１……ブースタシエル、２……ブ
ースタピストン、３……ダイヤフラム、３ａ……
外周ビード、３ｂ……内周ビード、５……制御弁
、８……弁筒、１１……入力杆、１２……弁ピス
トン、１２_１……外筒体、１２_２……内筒体、１
３……弁体、１３ｄ……着座面、６７……シリン
ダ孔、６９……ガイド突起。 The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view, FIG. 2 is a view taken along the line indicated by the arrow in FIG. 1, and FIG.
3 is a partial perspective view of the diaphragm, FIG. 4 is an enlarged view of the main part of FIG. 1, FIG. 5 is a sectional view taken along the line of FIG. 4, and FIG. 6 is an enlarged perspective view of the valve piston. S... Negative pressure booster, A... First working chamber, B
...Second working chamber, Ca...Caulking joint as input rod joint, 1...Booster shell, 2...Booster piston, 3...Diaphragm, 3a...
Outer bead, 3b... Inner bead, 5... Control valve, 8... Valve cylinder, 11... Input rod, 12... Valve piston, 12 ₁ ... Outer cylindrical body, 12 ₂ ... Inner cylindrical body, 1
3... Valve body, 13d... Seating surface, 67... Cylinder hole, 69... Guide protrusion.

Claims

[Scope of utility model registration request]

A booster piston that accommodates the inside of the booster shell so as to be able to reciprocate back and forth; and a booster piston that overlaps the rear surface of the booster piston to connect the inner peripheral bead to the booster piston and connect the outer peripheral bead to the peripheral wall of the booster shell. a first working chamber at the front connected to a negative pressure source, and a second working chamber at the rear selectively communicated with the first working chamber or the atmosphere through a control valve interlocked with the input rod. a valve cylinder for accommodating the control valve is provided protruding from the rear surface of the booster piston, and the control valve has a peripheral wall portion connected to the valve piston connected to the front end of the input rod, and a peripheral wall portion connected to the outer surface of the peripheral wall portion. A cylinder hole formed in the front inner wall of the valve cylinder, and a valve body having a seating surface facing a valve seat located on a rear end surface of the valve piston, in order to slide the valve piston through a guide protrusion that exists in the valve cylinder. In the negative pressure booster equipped with the valve piston, the valve piston is constituted by an outer cylinder and an inner cylinder fitted into the outer cylinder with a rear end surface located inside the cylinder,
The valve seat is located on the rear end surface of the outer cylindrical body, the guide protrusion is located near the valve seat on the outer surface of the peripheral wall of the outer cylindrical body, and the input rod coupling portion of the valve piston is located on the outer surface of the peripheral wall of the outer cylindrical body, and the input rod coupling portion of the valve piston is located on the outer surface of the peripheral wall of the outer cylindrical body. A negative pressure type booster, characterized in that the negative pressure booster is disposed in each of the inner cylinders so as to be surrounded by the inner cylinder.