A vibration-damping device (10) includes a tubular first attachment member (11) that is coupled to any one of a vibration-generating portion and a vibration-receiving portion; a second attachment member (12) that is coupled to the other one of the vibration-generating portion and the vibration-receiving portion; an elastic body (13) that couples both the attachment members (11 and 12) to each other; and a partition member (16) that divides a liquid chamber (19) inside the first attachment member (11) into a main liquid chamber (14) having the elastic body (13) as a part of a wall surface, and a sub-liquid chamber (15). A restriction passage (24) through which the main liquid chamber (14) and the sub-liquid chamber (15) communicate with each other is formed in the partition member (16). The partition member (16) is provided with a flow-speed restraint portion (32) which restrains a flow speed of liquid (L) flowing in the restriction passage (24). The flow-speed restraint portion (32) restrains a peak flow speed of the liquid (L) flowing into the main liquid chamber (14) from the restriction passage (24) to 10 m/sec or lower, when a liquid pressure in the main liquid chamber (14) is a negative pressure and a fluctuation rate of the liquid pressure within a predetermined time is 5% or lower.
VIBRATION-DAMPING DEVICE
2019-06-13
Patent
Electronic Resource
English
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