US 12,110,937 B2
Vibration-damping device
Yuki Satake, Tokyo (JP); Rei Mikoshiba, Tokyo (JP); and Akira Ueki, Tokyo (JP)
Assigned to Prospira Corporation, Kawasaki (JP)
Appl. No. 17/773,681
Filed by Prospira Corporation, Kawasaki (JP)
PCT Filed Nov. 5, 2020, PCT No. PCT/JP2020/041370
§ 371(c)(1), (2) Date May 2, 2022,
PCT Pub. No. WO2021/090886, PCT Pub. Date May 14, 2021.
Claims priority of application No. 2019-202586 (JP), filed on Nov. 7, 2019; and application No. 2019-202596 (JP), filed on Nov. 7, 2019.
Prior Publication US 2022/0397177 A1, Dec. 15, 2022
Int. Cl. F16F 13/10 (2006.01)
CPC F16F 13/107 (2013.01) [F16F 2238/04 (2013.01)] 8 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 of the vibration generating part and the vibration receiving part;
an elastic body that elastically couples both the attachment members to each other;
a partition member that partitions a liquid chamber in the first attachment member in which a liquid is enclosed into a main liquid chamber having the elastic body as a portion of a partition wall and an auxiliary liquid chamber in an axial direction along a central axis of the first attachment member; 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 that allows the main liquid chamber and the auxiliary liquid chamber to communicate with each other, a plurality of first communication holes that allow the main liquid chamber and the accommodation chamber to communicate with each other, and a second communication hole that allows the auxiliary liquid chamber and the accommodation chamber to communicate with each other,
a tubular member that protrudes in the axial direction toward the elastic body is disposed on a first wall surface of the partition member to which the 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 located inside the tubular member and an outer portion located outside the tubular member, on the first wall surface, and
any one of an outer peripheral surface and an inner peripheral surface of the tubular member is formed in a stepped shape in which a diameter changes via a stepped portion such that a thickness of the tubular member becomes smaller toward a second attachment member side in the axial direction.