Title:
ANTI-VIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/213225
Kind Code:
A1
Abstract:
A partition member (17) of an anti-vibration device (1, 2, 3, 4) comprises a membrane (31) and an orifice passage (21). The orifice passage comprises a main-fluid-chamber-side passage (21a) and an auxiliary-fluid-chamber-side passage (21b). The main-fluid-chamber-side passage and the auxiliary-fluid-chamber-side passage extend in the circumferential direction, and are arranged in mutually differing positions in the radial direction. The circulation direction in the main-fluid-chamber-side passage and the circulation direction in the auxiliary-fluid-chamber-side passage are opposite directions when fluid flows in the orifice passage. The flow path cross-sectional shape in at least one passage from among the main-fluid-chamber-side passage and the auxiliary-fluid-chamber-side passage is short in the axial direction along a center axis line (O) of a first attachment member, and has a shape that is long in the radial direction and flat in the width direction. The ratio of the radial-direction size to the axial-direction size of the one passage is greater than the ratio of the other passage.
Inventors:
KOJIMA HIROSHI (JP)
Application Number:
PCT/JP2020/003722
Publication Date:
October 22, 2020
Filing Date:
January 31, 2020
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
International Classes:
B60K5/12; F16F13/10
Domestic Patent References:
| WO2019074069A1 | 2019-04-18 |
Foreign References:
| JP2009052696A | 2009-03-12 | |||
| JP2007085523A | 2007-04-05 | |||
| JP2019078794A | 2019-05-23 | |||
| JP2007085523A | 2007-04-05 |
Other References:
See also references of EP 3957505A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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