Title:
FLUID-FILLED CYLINDRICAL ANTI-VIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/286397
Kind Code:
A1
Abstract:
Provided is a fluid-filled cylindrical anti-vibration device having a novel structure that makes it possible to more efficiently control the flow characteristics of an orifice passage, and for example, makes it easy to effectively adjust or switch anti-vibration characteristics while reducing power consumption. This fluid-filled cylindrical anti-vibration device 10, in which an inner shaft member 14 and an outer cylindrical member 16 are elastically connected by a main rubber elastic body 16 and a plurality of fluid chambers 38a, 38b are communicated with each other via an orifice passage 40, is configured such that: the fluid filled in the fluid chambers 38a, 38b is a magnetic functional fluid; a magnetic unit 58 that generates a magnetic field through electrification is provided; magnetic path forming members 44, 44 within the magnetic field generated by the magnetic unit 58 are provided on side wall portions on both sides of the orifice passage 40; and at least one of the magnetic path forming members 44, 44 is provided with a magnetic flux concentration portion 46 that decreases in size toward the inside in the opposite direction of the longitudinal direction of the orifice passage 40.
Inventors:
HIRANO MASAAKI (JP)
KUME TAKASHI (JP)
KUME TAKASHI (JP)
Application Number:
PCT/JP2022/016195
Publication Date:
January 19, 2023
Filing Date:
March 30, 2022
Export Citation:
Assignee:
SUMITOMO RIKO CO LTD (JP)
International Classes:
F16F13/30; F16F13/14
Domestic Patent References:
| WO2021240908A1 | 2021-12-02 |
Foreign References:
| JP2014525011A | 2014-09-25 | |||
| JP2011153691A | 2011-08-11 | |||
| JP2015505014A | 2015-02-16 | |||
| JP2020133703A | 2020-08-31 |
Attorney, Agent or Firm:
KASAI & NAKANE INTERNATIONAL PATENT FIRM et al. (JP)
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