| 摘要 |
PROBLEM TO BE SOLVED: To achieve a given damping effect, to vibration in a wide high frequency range by making rigidity of a partition wall itself variable. SOLUTION: The partitioning wall 7 partitioning a liquid chamber into main and sub liquid chambers 9, 8 connecting and communicating with each other through a damping orifice 10 is formed like a piston capable of displacing in such a direction as to vary volumes of the main and sub liquid chambers 9, 8. On an outer peripheral portion of the piston like partition wall 7, an electromagnet 11 is annually arranged to form one portion of a body 6, and between the electromagnet 11 and the piston like partition wall 7, a MR fluid 15 varying in its viscosity according to an intensity of a magnetic field is interposed in a sealed state. |
