JPH02138251U

JPH02138251U -

Info

Publication number: JPH02138251U
Application number: JP4780189U
Authority: JP
Priority date: 1989-04-24
Filing date: 1989-04-24
Publication date: 1990-11-19
Anticipated expiration: 2004-04-24
Also published as: JPH089470Y2

Description

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

第１図は本考案の要部断面図、第２図はシヨツ
クアブソーバの断面図である。図中１…減衰力可変シヨツクアブソーバ、３
…チユーブ、５…ピストン、５ａ…上部通路（連
通路）、１０…第１油室、１１…第２油室、１７
…圧電素子、２２…バルブ、２３…アクチユエー
タ、２５…増幅手段、３７…シリンダ、３８…大
径ピストン、４０…油圧拡大室、４１…皿バネ、
４２…窪み（連通手段）、４４…プランジヤ。 FIG. 1 is a sectional view of a main part of the present invention, and FIG. 2 is a sectional view of a shock absorber. In the figure 1... variable damping force shock absorber, 3
...Tube, 5...Piston, 5a...Upper passage (communication passage), 10...First oil chamber, 11...Second oil chamber, 17
... piezoelectric element, 22 ... valve, 23 ... actuator, 25 ... amplification means, 37 ... cylinder, 38 ... large diameter piston, 40 ... hydraulic expansion chamber, 41 ... disc spring,
42... recess (communication means), 44... plunger.

Claims

【実用新案登録請求の範囲】一方の部材に連結するチユーブと、他方の部材に連結し、前記チユーブ内に摺動自
在に配されて、前記チユーブ内を第１油室と第２
油室とに区画するピストンと、前記第１油室と第２油室とを連通する連通路の
連通面積を可変するバルブと、このバルブを変位させるアクチユエータとを具備する減衰力可変シヨツクアブソーバにお
いて、前記アクチユエータは、 (a) 印加電圧によつて伸縮変位する圧電素子の
出力変位量を増大して前記バルブへ伝達する増幅
手段を備え、この増幅手段は、 (a-1) 前記圧電素子の出力によつて駆動され
、移動する大径ピストンと、 (a-2) 該大径ピストンを摺動自在に配設し、
前記大径ピストンの移動量に応じて内部油圧が変
化するシリンダと、 (a-3) 該シリンダ内の油圧によつて駆動され
、移動する前記大径ピストンよりも小径なプラン
ジヤとを具備し、 (b) 前記大径ピストンと前記シリンダとによつ
て囲まれる油圧拡大室内に、前記圧電素子へ初期
荷重を付与する皿バネを配設し、 (b-1) 該皿バネによつて区画される前記油圧
拡大室内を連通手段によつて連通させたことを特徴とする減衰力可変シヨツクアブソー
バ。[Claims for Utility Model Registration] A tube connected to one member; and a tube connected to the other member and slidably disposed within the tube, and a first oil chamber and a second oil chamber connected to the other member.
A variable damping force shock absorber comprising: a piston partitioned into an oil chamber; a valve that changes the communication area of a communication passage that communicates the first oil chamber and the second oil chamber; and an actuator that displaces the valve. , the actuator includes (a) an amplification means for increasing the output displacement amount of the piezoelectric element that expands and contracts in response to an applied voltage and transmits it to the valve; a large-diameter piston that is driven by an output and moves; (a-2) the large-diameter piston is slidably arranged;
a cylinder whose internal oil pressure changes according to the amount of movement of the large diameter piston; (a-3) a plunger having a smaller diameter than the large diameter piston that is driven by the oil pressure in the cylinder and moves; (b) a disc spring for applying an initial load to the piezoelectric element is disposed in a hydraulic expansion chamber surrounded by the large-diameter piston and the cylinder; A variable damping force shock absorber, characterized in that said hydraulic expansion chamber is communicated with each other by a communication means.