MRF DEVICE AND JOY STICK DEVICE

• Main Authors: KUSUDA TOSHIAKI, CHENG SHUZHEN
• Format: Patent
• Language: English; Japanese
• Published: 22.06.2017
• Subjects: BLASTING; CALCULATING; COMPUTING; CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BYMECHANICAL FEATURES ONLY; CONTROLLING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEANS FOR DAMPING VIBRATION; MECHANICAL ENGINEERING; PHYSICS; REGULATING; SHOCK-ABSORBERS; SPRINGS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a MRF device and joy stick device, capable of directly using a yield stress resistance occurring when a magnetic field is applied to a magnetic viscous fluid in spite of a simple structure to appropriately control the viscosity of the magnetic viscous fluid.SOLUTION: A MRF device X comprises a cylinder 1 made of a magnetic material and a piston 2 relatively movable to the cylinder 1. The piston 2 comprises: a shaft 21; a coil 22 having an inner diameter larger than the outer diameter of the shaft 21; and a yoke 23 arranged in the radial direction W of the shaft 21 between the shaft 21 and the coil 22 and arranged at a position sandwiching the coil 22 in the axial direction H of the shaft 21. A magnetic viscous fluid 3 is arranged in a space S between the outer peripheral surfaces 234b and 235b of yoke projection parts 234 and 235, and the inner peripheral surface 1a of the cylinder 1 in the radial direction W of the shaft 21.SELECTED DRAWING: Figure 3 【課題】簡単な構造でありながら、磁気粘性流体に磁場を印加させた場合に生じる降伏応力抵抗を直接利用して、磁気粘性流体の粘度調整を適切に行うことが可能なＭＲＦデバイス、及びジョイスティック装置を提供する。【解決手段】磁性体のシリンダ１と、シリンダ１に対して相対移動可能なピストン２とを備えたＭＲＦデバイスＸである。ピストン２として、シャフト２１と、シャフト２１の外径よりも大きい内径を有するコイル２２と、シャフト２１の径方向Ｗにおいてシャフト２１とコイル２２の間に配置され、且つ、シャフト２１の軸方向Ｈにおいてコイル２２を挟む位置に配置されたヨーク２３とを備えたものを適用し、シャフト２１の径方向Ｗにおけるヨーク突出部２３４、２３５の外周面２３４ｂ、２３５ｂとシリンダ１の内周面１ａの隙間Ｓに磁気粘性流体３を配置する。【選択図】図３