| 摘要 |
PURPOSE:To have drop of the damping force except during specifical resonances, when a generative action for damping force shall be made, by shutting communication of oil lines in compliance with vertical motion of two resonance elements in sliding contact with the periphery of the shaft part of piston rod. CONSTITUTION:When vibratory frequency applied to resonance elements 20, 21 lies outside a certain specific resonance range, a through hole 25 of the resonance element 20 situated below is in communication with a horizontal oil line 7 through an oil chamber 25', so that not so large damping force is generated. When the vibratory frequency becomes within the specific resonance range including the resonance point omega1 of the resonance elements 20, 21, they move vertically to a great extent, to shut communication of the above-mentioned through hole 25 of resonance element 20 situated below with the horizontal oil line 7 of piston rod 2, and all oil in a chamber situated above 4 flows into a chamber 5 situated below through a piston 3 below. Now a desired great damping force is generated. |
