US 12,247,632 B2
Vibration-damping device
Rei Mikoshiba, Tokyo (JP); Yuki Satake, Tokyo (JP); and Akira Ueki, Tokyo (JP)
Assigned to Prospira Corporation, Kanagawa (JP)
Appl. No. 17/772,372
Filed by Prospira Corporation, Kawasaki (JP)
PCT Filed Nov. 9, 2020, PCT No. PCT/JP2020/041665
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2021/090946, PCT Pub. Date May 14, 2021.
Claims priority of application No. 2019-202574 (JP), filed on Nov. 7, 2019; application No. 2019-202580 (JP), filed on Nov. 7, 2019; and application No. 2019-202590 (JP), filed on Nov. 7, 2019.
Prior Publication US 2022/0373058 A1, Nov. 24, 2022
Int. Cl. F16F 13/10 (2006.01); B60K 5/12 (2006.01)
CPC F16F 13/107 (2013.01) [B60K 5/1208 (2013.01); F16F 13/108 (2013.01); F16F 2228/066 (2013.01); F16F 2230/36 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A vibration-damping device comprising:
a tubular first attachment member that is coupled to any one of a vibration generating part and a vibration receiving part, and a second attachment member that is coupled to the other thereof;
an elastic body that elastically couples both the first and second attachment members to each other;
a partition member that partitions a liquid chamber, in which a liquid is enclosed and with which the first attachment member is provided, into a main liquid chamber and an auxiliary liquid chamber in an axial direction along a central axis of the first attachment member, the main liquid chamber having the elastic body as a portion of a partition wall; and
a movable member that is deformably or displaceably accommodated in an accommodation chamber provided in the partition member,
wherein the partition member is provided with an orifice passage, a plurality of first communication holes, and a second communication hole, the orifice passage which allows the main liquid chamber and the auxiliary liquid chamber to communicate with each other, the plurality of first communication holes which allow the main liquid chamber and the accommodation chamber to communicate with each other, and the second communication hole which allows the auxiliary liquid chamber and the accommodation chamber to communicate with each other,
a tubular member is disposed on a first wall surface of the partition member, the tubular member which protrudes in the axial direction toward the elastic body, the first wall surface to which the plurality of first communication holes are open and which constitutes a portion of an inner surface of the main liquid chamber,
the plurality of first communication holes are open to both an inner portion and an outer portion on the first wall surface, the inner portion located inside the tubular member, and the outer portion located outside the tubular member, and
one of the partition member and the tubular member forms an elasticity adjusting unit in which an elasticity of the elastic body is made to be apparently different in a circumferential direction around the central axis.