Title:
VIBRATION ISOLATION DEVICE
Document Type and Number:
Japanese Patent JP2019203541
Kind Code:
A
Abstract:
To securely suppress abnormal noise caused by cavitation breaking without excessively decreasing inner diameters of pores.SOLUTION: A fluid encapsulated type vibration isolation device 10 includes a partition member 16 which partitions a fluid chamber 19 in a first attachment member 11 and encapsulating fluid L into a first fluid chamber 14 and a second fluid chamber 15, and a restriction passage 24 formed in the partition member so as to communicate the first fluid chamber and the second fluid chamber. The restriction passage includes a first communication part 26 opening to the first fluid chamber, a second communication part opening to the second fluid chamber, and a main body flow passage 25 communicating the first communication part and the second communication part. At least one of the first communication part and the second communication part includes a plurality of pores 26a, 26b penetrating the first barrier 38 facing the first fluid chamber or the second fluid chamber. The main body flow passage is provided with a reverse flow protrusion 41 with which liquid from the other of the first communication part and the second communication part is made to collide for reverse flowing.SELECTED DRAWING: Figure 1
Inventors:
BABA YUTA
UEKI SATORU
SATAKE YUKI
UEKI SATORU
SATAKE YUKI
Application Number:
JP2018098064A
Publication Date:
November 28, 2019
Filing Date:
May 22, 2018
Export Citation:
Assignee:
BRIDGESTONE CORP
International Classes:
F16F13/10
Domestic Patent References:
| JP2016176509A | 2016-10-06 | |||
| JP2015209966A | 2015-11-24 | |||
| JPH0788869B2 | 1995-09-27 |
Foreign References:
| WO2016027606A1 | 2016-02-25 | |||
| WO2015068804A1 | 2015-05-14 | |||
| WO2008156169A1 | 2008-12-24 | |||
| WO2015163027A1 | 2015-10-29 | |||
| US20040089989A1 | 2004-05-13 |
Attorney, Agent or Firm:
Sumio Tanai
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki