Title:
VIBRATION-DAMPING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/090886
Kind Code:
A1
Abstract:
Formed in a partition member (16) are an orifice passage (24) through which a main liquid chamber (14) and a sub liquid chamber (15) are in communication, a plurality of first communication holes (42a) through which the main liquid chamber and an accommodation chamber (42) are in communication, and second communication holes (42b) through which the sub liquid chamber and the accommodation chamber are in communication. In the partition member, a cylindrical member (21) protruding in an axial direction toward an elastic body (13) is placed on a first wall surface (16b) in which the first communication holes open and which constitutes part of the inner surface of the main liquid chamber, the plurality of first communication holes open in the first wall surface in both an inner-side portion (16f) positioned on the inner side of the cylindrical member and an outer-side portion (16g) positioned on the outer side of the cylindrical member, and either the outer peripheral surface or the inner peripheral surface of the cylindrical member is formed into the form of steps in which the diameter changes via step parts (21b) so that the thickness of the cylindrical member decreases toward a second attachment member (12) extending along the axial direction.
Inventors:
SATAKE YUKI (JP)
MIKOSHIBA REI (JP)
UEKI AKIRA (JP)
MIKOSHIBA REI (JP)
UEKI AKIRA (JP)
Application Number:
PCT/JP2020/041370
Publication Date:
May 14, 2021
Filing Date:
November 05, 2020
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
International Classes:
F16F13/10
Domestic Patent References:
| WO2019216403A1 | 2019-11-14 |
Foreign References:
| JP2010031989A | 2010-02-12 | |||
| JP2015059655A | 2015-03-30 | |||
| JPH01193426A | 1989-08-03 | |||
| JP2006200590A | 2006-08-03 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
Download PDF: