MAGNETIC VISCOUS FLUID FLOW TYPE VIBRATION DAMPING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a magnetic viscous fluid flow type vibration damping device which is miniaturized by a simple structure and can easily adjust the performance.;SOLUTION: A single rod type vibration damping device is constituted, in which a piston rod 2 passes through one end of a cylinder 1 in a freely incoming/outgoing manner, and a piston 3 is fixed to an end of the piston rod 2. An oil passage 11 is formed of the cylinder 1 and a concentric outer tube 4 covering its outer circumference. The oil passage 11 communicates hydraulic pressure chambers 7, 8 with each other together with a through-hole 3a of the piston 3, and a distribution passage of a magnetic viscous fluid is formed thereby. A non-return valve 9 to be opened by the negative pressure of the first hydraulic pressure chamber 7 is provided on an end lid 1a of the cylinder 1, and a non-return valve 13 to be opened by the positive pressure of the first hydraulic pressure chamber 7 of the cylinder 1 is provided in the through-hole 3a of the piston 3. An accumulator 5 is formed between the end lid 1a of the cylinder 1 and an end lid 4a of the outer tube 4 by a free piston 4c fitted to the outer tube 4. The magnetic field orthogonal to the distributing direction is formed in an orifice 6 of a rod cover 1b adjacent to the second hydraulic pressure chamber 8 of the cylinder 1.;COPYRIGHT: (C)2013,JPO&INPIT