JPH01112105U

JPH01112105U -

Info

Publication number: JPH01112105U
Application number: JP693988U
Authority: JP
Priority date: 1988-01-22
Filing date: 1988-01-22
Publication date: 1989-07-27

Description

[Brief explanation of the drawing]

第１図〜第４図は本考案の一実施例を説明する
ためのものであつて、第１図は車高の車高調整系
統の構成図、第２図はバルブアツセンブリ及びエ
アシリンダ装置の取付状態を示す側面図、第３図
はエアシリンダ装置の縦断面図、第４図はダスト
ブーツの排気部の要部拡大斜視図、第５図は従来
のエアシリンダ装置を示す縦断面図である。２１…エアシリンダ装置、２７…シリンダ、２
８…ピストン、２９…作動ロツド、３０…ダスト
ブーツ、３０ａ…空間、３１…作動圧室、３２…
排圧室、３３…戻しばね、３５…圧縮エア供給口
、３６…第１のエア通路、３７…第２のエア通路
、３８…通路切換機構を構成するダブルチエツク
弁、３９，４１…連通路、４０…パイプ、４２…
排気部、４３…排気口、４４…切込み。 Figures 1 to 4 are for explaining one embodiment of the present invention, in which Figure 1 is a configuration diagram of a vehicle height adjustment system, and Figure 2 is a valve assembly and air cylinder device. Fig. 3 is a longitudinal sectional view of the air cylinder device, Fig. 4 is an enlarged perspective view of the main part of the exhaust part of the dust boot, and Fig. 5 is a longitudinal sectional view showing the conventional air cylinder device. It is. 21...Air cylinder device, 27...Cylinder, 2
8... Piston, 29... Operating rod, 30... Dust boot, 30a... Space, 31... Operating pressure chamber, 32...
Exhaust pressure chamber, 33...Return spring, 35...Compressed air supply port, 36...First air passage, 37...Second air passage, 38...Double check valve constituting the passage switching mechanism, 39, 41...Communication passage , 40...pipe, 42...
Exhaust part, 43...Exhaust port, 44...Notch.

Claims

[Claims for Utility Model Registration] A cylinder in which a piston that is always biased in one direction by a return spring is slidably housed; a compressed air supply port provided in the cylinder; and a compressed air supply port provided in the cylinder; and a retractable dust boot having one end attached to the cylinder and the other end attached to the distal end of the actuating rod to cover the circumference of the attached actuating rod, comprising: (a) a retractable dust boot attached to the distal end of the actuating rod; (b) providing first and second air passages for communicating an air supply port with a working pressure chamber in the cylinder and a space in the dust boot, respectively; When compressed air is supplied, the second air passage is closed to communicate the compressed air supply port and the working pressure chamber with each other, and when the piston moves back, the compressed air supply port is closed. A passage switching mechanism is provided that operates to connect the first air passage and the space within the dust boot with each other. (c) the dust boot is provided with an exhaust part that is closed when the internal pressure is atmospheric pressure and opens when the internal pressure increases; An air cylinder device, further comprising a third air passage that communicates with the exhaust pressure chamber of the cylinder, which is formed on the opposite side of the working pressure chamber with respect to the piston.