Vibration-damping device
AssigneeBridgestone Corporation
InventorsMasakazu Nagasawa, Akira Ueki, Yasuyuki Nagashima
Life of this patent
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Abstract
The present invention is a liquid-tight the vibration-damping device (10). In this vibration-damping device (10), a limiting passage (24) includes a main body passage (25) disposed inside a partition member (16), a first communication section (26) configured to communicate the main body passage (25) and a first liquid chamber (14), and a second communication section (27) configured to communicate the main body passage (25) with a second liquid chamber (12). At least one of the first communication section (26) and the second communication section (27) includes openings (31).
Claims7
A liquid-tight vibration-damping device which includes:
- a tubular first attachment member joined to one of a vibration generating section and a vibration receiving section;
- a second attachment member joined to the other of the vibration generating section and the vibration receiving section;
- an elastic body configured to elastically join the first attachment member and the second attachment member;
- a partition member configured to partition a liquid chamber in the first attachment member in which a liquid is sealed into a first liquid chamber and a second liquid chamber;
- and
- a limiting passage formed in the partition member and configured to communicate the first liquid chamber and the second liquid chamber,
- wherein, the limiting passage includes:
- a main body passage, an entirety of the main body passage extending inside the partition member in a circumferential direction around an axial center of the vibration-damping device and defined by a first wall of the partition member which faces the first liquid chamber and a second wall thereof which faces the second liquid chamber;
- a first communication section configured to communicate the main body passage and the first liquid chamber;
- and
- a second communication section configured to communicate the main body passage and the second liquid chamber,
- at least one of the first communication section and the second communication section passes through the first wall or the second wall and has openings disposed in the circumferential direction, and
- the openings include a first set of openings positioned at a first position in a radial direction of the partition member, and the openings further include a second set of openings positioned at a second position in the radial direction of the partition member, and
- the second position, that includes the second set of openings, being located further away in the radial direction from a center of the partition member than the first position that includes the first set of openings.
Dependencies are inferred from the claim text.