JPS6138344U - Variable damping force hydraulic shock absorber - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図ないし第４図は本考案に係る減衰力可変型液圧緩
衝器の一実施例を示す要部断面図で、第１図及び第２図
はソレノイドの非通電時における伸び側行程及ひ圧側行
程の状態を示す要部断面図、第３図及び第４図はソレノ
イドの通電時における伸び側行程及び圧側行程の状態を
示す要部断面図である。 第５図及び第６図は本考案の他の実施例を示す要部断面
図で、第５図はソレノイドの非通電時における伸び側行
程の状態を示す要部断面図、第６図はソレノイドの通電
時における伸び側行程の状態を示す要部断面図、第７図
は従来の減衰力可変型液圧緩衝器を示す断面図である。 １・・・シリンタ、２・・・ピストンロンド、３・・・
上部液室、４・・・下部液室、５・・・ピストン、６・
・・減衰力発生手段、１７・・・減衰力調整機構、１７
ａ・・・可動弁収容部、１７ｂ・・・第１連通路、１７
ｃ・・・第２連通路、１７ｄ・・・可動弁、１７ｅ・・
・ソレノイド、１７ｆ・・・スプール弁収容部、１７ｇ
・・・バ・イパス通路、１７ｈ・・・スブール弁、１７
ｔｔ １７ｊ・・・作動室、１７ｋ・・・第３連通路
。1 to 4 are sectional views of main parts showing an embodiment of a variable damping force type hydraulic shock absorber according to the present invention, and FIGS. 1 and 2 show the extension side stroke and FIGS. 3 and 4 are sectional views of main parts showing the state of the tension side stroke, and FIGS. 3 and 4 are main part sectional views showing the states of the extension side stroke and the pressure side stroke when the solenoid is energized. 5 and 6 are sectional views of main parts showing other embodiments of the present invention, FIG. 5 is a sectional view of main parts showing the state of the extension stroke when the solenoid is not energized, and FIG. 6 is a sectional view of the main parts of the solenoid. FIG. 7 is a cross-sectional view of a conventional variable damping force type hydraulic shock absorber. 1... Cylinder, 2... Piston Rond, 3...
Upper liquid chamber, 4... Lower liquid chamber, 5... Piston, 6.
... Damping force generating means, 17... Damping force adjustment mechanism, 17
a... Movable valve housing part, 17b... First communication path, 17
c...Second communication passage, 17d...Movable valve, 17e...
・Solenoid, 17f...Spool valve housing part, 17g
...Bay pass passage, 17h...Sbourg valve, 17
tt 17j... Working chamber, 17k... Third communication passage.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 作動液を内部に充填したシリンダと、このシリンタの一
端を封止的に貫通して延びるピストンロンドと、このピ
ストンロンドに固着され、前記シリンダの内部を上部液
室と下部液室との二室に隔成すべく、前記シリンダ内に
摺動可能に嵌挿されたピストンと、前記上部液室と下部
液室との′間で行われるべき作動液の置換流動に流通抵
抗を与えて減衰力を発生すべく、前記ピストゾに設けら
れた減衰力発生手段と、この減衰力発生手段で得られる
減衰力を可変調整すべく、前記ピストンロツドに設けら
れた減衰力調整機構とを備えた減衰力可変型液圧緩薗器
において、前記減衰力調整機構を、ピストンロンドに形
成された可動弁収容部と、この可動弁収容冊と前記上部
液室とを連通させるべく、前記ピストンロンドに形成さ
れた第１連通路と、前記可動弁収容部と前記下部液室と
を連通ざせるへ奴前記ピストンロンドに形成さ（〜だ第
２連通路と、前記可動弁収容部内に移動可能に配置され
た可動弁と、この可動弁を移動制御して、前記第１連通
路と第２連通路とを選択的に開閉制御するソレノイドと
、前記可動弁収容部と所定間隔を置いて形成されたスプ
ール弁収容部と、この、スプール弁収容部を介して、前
記上部液室と下部液室とを連通ずるためのバイパス通路
を開閉制御すべく、前記スプール弁収容部内に摺動行能
に嵌挿されたスプール弁と、このスプール弁によって隔
成された二つの作動室のうち、一方の作動室と前記可動
弁収容部とを連通ずるための第３連通路とから構成した
ことを特徴とする減衰力可変型液圧緩衝器。A cylinder filled with hydraulic fluid, a piston rod extending sealingly through one end of the cylinder, and two chambers, an upper liquid chamber and a lower liquid chamber, which are fixed to the piston rod and define the inside of the cylinder. In order to achieve this, a damping force is created by providing flow resistance to the replacement flow of the working fluid that is to be performed between the piston that is slidably fitted into the cylinder, and the upper and lower fluid chambers. A variable damping force type comprising a damping force generating means provided on the piston rod to generate the damping force, and a damping force adjusting mechanism provided on the piston rod to variably adjust the damping force obtained by the damping force generating means. In the hydraulic damper, the damping force adjustment mechanism is connected to a movable valve accommodating portion formed in the piston rond, and a movable valve accommodating portion formed in the piston rond to communicate with the upper liquid chamber. A second communicating passage and a movable valve disposed movably within the movable valve housing are formed in the piston rond to communicate with the movable valve housing and the lower liquid chamber. a valve; a solenoid that controls the movement of the movable valve to selectively open and close the first communicating passage and the second communicating passage; and a spool valve housing formed at a predetermined distance from the movable valve housing. and a bypass passage slidably inserted into the spool valve accommodating part to control opening and closing of a bypass passage for communicating the upper liquid chamber and the lower liquid chamber via the spool valve accommodating part. A damping force comprising a spool valve and a third communication passage for communicating one of the two working chambers separated by the spool valve with the movable valve accommodating portion. Variable hydraulic shock absorber.