Title:
ANTIVIBRATION DEVICE
Document Type and Number:
Japanese Patent JP2021076166
Kind Code:
A
Abstract:
To attenuate and absorb midfrequency vibration.SOLUTION: In a partition member 16, there are formed an orifice channel 24 communicating a main liquid chamber 14 with a sub liquid chamber 15, a plurality of first communication holes 42a communicating the main liquid chamber with a storage chamber 42, and a second communication hole 42b communicating the sub liquid chamber with the storage chamber. In the partition member, a first wall surface 16b in which the first communication hole is opened and which constitutes a part of an inner surface of the main liquid chamber, is provided with a cylindrical member 21 protruding toward an elastic body 13 in an axial direction. The plurality of first communication holes are opened on the first wall surface both in an inner part 16f located inside the cylindrical member and in an outer part 16g located outside the cylindrical member. In the first wall surface, the plurality of first communication holes are separately opened in a first region X and a second region Y provided differently in a position in a circumferential direction from a position of the first region. A proportion of an opening area of the first communication hole to a plane area of the first region and a proportion of an opening area of the first communication hole to a plane area of the second region are different from each other.SELECTED DRAWING: Figure 1
Inventors:
MIKOSHIBA TSUTOMU
SATAKE YUKI
UEKI SATORU
SATAKE YUKI
UEKI SATORU
Application Number:
JP2019202580A
Publication Date:
May 20, 2021
Filing Date:
November 07, 2019
Export Citation:
Assignee:
BRIDGESTONE CORP
International Classes:
F16F13/10; B60K5/12
Attorney, Agent or Firm:
Sumio Tanai
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki