Title:
VIBRATION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2019086100
Kind Code:
A
Abstract:
To suppress rise of a dynamic spring, leakage of a liquid, and the like, even when liquid of high viscosity is sealed in liquid chambers.SOLUTION: An elastic body includes moderate elastic bodies respectively disposed at both sides through an inner mounting member 11 in a radial direction, a covering member 17 for covering the moderate elastic bodies adjacent to each other in a circumferential direction from a radial outer side to define a liquid chamber with respect to the inner mounting member, is disposed between the inner mounting member and an outer cylinder, an orifice passage for communicating the liquid chambers, is formed between the covering member and the outer cylinder, a liquid of kinematic viscosity of 50 cSt or more at 40°C is sealed in the liquid chambers, a wall surface defining the orifice passage is provided with a first short-circuit through hole 21 for making the liquid circulated in the orifice passage from one liquid chamber to the other liquid chamber, reach the other liquid chamber in a short-circuited manner, and circulation resistance of the first short-circuit through hole 21 is smaller than circulation resistance of the orifice passage.SELECTED DRAWING: Figure 5
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Inventors:
KOJIMA HIROSHI
Application Number:
JP2017215408A
Publication Date:
June 06, 2019
Filing Date:
November 08, 2017
Export Citation:
Assignee:
BRIDGESTONE CORP
International Classes:
F16F13/14
Attorney, Agent or Firm:
Sumio Tanai
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki