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1. JP2007239982 - MAGNETORHEOLOGICAL FLUID DAMPER

Office
Japan
Application Number 2006099661
Application Date 31.03.2006
Publication Number 2007239982
Publication Date 20.09.2007
Grant Number 4728861
Grant Date 22.04.2011
Publication Kind B2
IPC
F16F 9/53
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
9Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
32Details
53Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
Applicants CENTRAL RES INST OF ELECTRIC POWER IND
一般財団法人電力中央研究所
Inventors MURAKAMI TAKAHIRO
村上 貴裕
ARAZEKI HIDEO
荒関 英夫
Agents 村瀬 一美
Priority Data 2006032724 09.02.2006 JP
Title
(EN) MAGNETORHEOLOGICAL FLUID DAMPER
(JA) 磁気粘性流体ダンパ
Abstract
(EN)

PROBLEM TO BE SOLVED: To simplify construction and simultaneously to enhance reliability by automatically making damping force vary in response to displacement of a piston and thus autonomously operating without providing a sensor sensing the displacement of the piston and a control device controlling a supply of electric power in a magnetorheological fluid damper.

SOLUTION: The magnetorheological fluid damper is configured so as to include magnetorheological fluid 8, a piston 2 made of a ferromagnet, a cylinder part 3 which encloses the magnetorheological fluid 8 and simultaneously houses the piston 2, a piston rod 4 which supports the piston 2 by penetrating the cylinder part 3, a magnetic field generator 6 which is provided outside the cylinder part 3, a first yoke material 5 which is disposed around the circumference of the cylinder part 3 and a second yoke material 7 which is disposed around the circumference of the piston rod 4 outside the cylinder part 3.

COPYRIGHT: (C)2007,JPO&INPIT

(JA)

【課題】磁気粘性流体ダンパにおいて、ピストンの変位を感知するセンサや電力の供給を制御する制御装置を設けることなく、ピストンの変位に応じて自働的に減衰力を変化させて自立して作動させることにより、構造を簡単にすると共に信頼性を高める。
【解決手段】磁気粘性流体8と、強磁性体製ピストン2と、磁気粘性流体8を密封すると共にピストン2を収容するシリンダ部3と、シリンダ部3を貫通してピストン2を支持するピストンロッド4と、シリンダ部3の外に設けられた磁場発生装置6と、シリンダ部3の周囲に配置された第一のヨーク材5と、シリンダ部3の外でピストンロッド4の周囲に配置された第二のヨーク材7とを有するようにした。
【選択図】図1