Title:
LIQUID-ENCLOSED ANTIVIBRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/145656
Kind Code:
A1
Abstract:
In order to advantageously suppress a cavitation phenomenon, provided is a liquid-enclosed antivibration device wherein a damping orifice passage (14) and an elastic partition portion (30) are provided in a partition member (11) for separating a main liquid chamber (12) from a subsidiary liquid chamber (13). A stopper leg portion (35) is integrally projected from the underside surface of an elastic film portion (31) provided in the center portion of the elastic partition portion (30), and is abutted against an abutment surface (47) of a support wall (44) of a frame member (40), so that a third liquid chamber (61) is defined by the support wall (44), the elastic partition portion (30), and the stopper leg portion (35), and is open in the vicinity of the main liquid chamber (12)-side opening (24) of the damping orifice passage (14) via a relief passage (60). The diameter of the abutment surface (47) gradually increases upward, and accordingly, when the elastic film portion (31) is elastically deformed to a great extent toward the main liquid chamber (12) during a reverse action toward the negative pressure side after an excess amplitude vibration is input, the stopper leg portion (35) is moved apart from the upper portion of the abutment surface (47), and the main liquid chamber (12) communicates with the subsidiary liquid chamber (13) via the relief passage (60) and the third liquid chamber (61), so that operating fluid is introduced to the main liquid chamber, to reduce the negative pressure of the main liquid chamber (12), and suppress the cavitation phenomenon.
Inventors:
SATORI KAZUTOSHI (JP)
HIRANO YUKINOBU (JP)
HIRANO YUKINOBU (JP)
Application Number:
PCT/JP2011/061446
Publication Date:
November 24, 2011
Filing Date:
May 18, 2011
Export Citation:
Assignee:
YAMASHITA RUBBER KK (JP)
SATORI KAZUTOSHI (JP)
HIRANO YUKINOBU (JP)
SATORI KAZUTOSHI (JP)
HIRANO YUKINOBU (JP)
International Classes:
F16F13/10; F16F13/06; F16F13/18
Foreign References:
| JP2008185152A | 2008-08-14 | |||
| JP2001200882A | 2001-07-27 | |||
| JP2004251438A | 2004-09-09 |
Attorney, Agent or Firm:
KOMATSU Kiyomitsu (JP)
Kiyomitsu Komatsu (JP)
Kiyomitsu Komatsu (JP)
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Claims: