Title:
防振装置
Document Type and Number:
Japanese Patent JP6921715
Kind Code:
B2
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 a connection part with one of the liquid chambers of the orifice passage is provided with a third short-circuit through hole 23 opened at a connection part side with the other liquid chamber in a short-circuited manner, and circulation resistance of the third short-circuit through hole is smaller than circulation resistance of the orifice passage.SELECTED DRAWING: Figure 4
Inventors:
Hiroshi Kojima
Application Number:
JP2017215413A
Publication Date:
August 18, 2021
Filing Date:
November 08, 2017
Export Citation:
Assignee:
Bridgestone Corporation
International Classes:
F16F13/14
Domestic Patent References:
| JP2016080056A | ||||
| JP8193639A | ||||
| JP4054342A | ||||
| JP4203631A | ||||
| JP2008151215A | ||||
| JP2002227913A | ||||
| JP2008190653A |
Attorney, Agent or Firm:
Sumio Tanai
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki
Nishizawa Kazumi
Hiroki Ninai
Makiko Otsuki