Vibration damping device
AssigneeBridgestone Corporation
InventorHiroshi Kojima
Life of this patent
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Abstract
A vibration damping device (1, 10, 100) includes a tubular metal bracket (20, 120), a first attachment member (12, 112), a second attachment member (11, 23, 111), an elastic body (13, 113), a partition member (17, 117), and a diaphragm (19, 119). A fixed portion (11g, 23c, 111c) fixed to a fixing portion (20b, 120b) of the metal bracket is formed in the second attachment member. A gap (S2, S21) is provided between a portion of an outer circumferential surface of the second attachment member except for the fixed portion, and a portion of an inner circumferential surface of the metal bracket except for the fixing portion, and a second seal portion (22, 123) is provided between the fixed portion and the fixing portion.
Claims9
A vibration damping device comprising:
- a tubular metal bracket which is connected to any one of a vibration generating portion and a vibration receiving portion;
- a first attachment member which is connected to the other of the vibration generating portion and the vibration receiving portion;
- a tubular second attachment member which is inserted into the metal bracket;
- an elastic body which connects the first attachment member and the second attachment member to each other;
- a partition member which partitions a liquid chamber in the second attachment member into a main liquid chamber having the elastic body as a portion of a partition wall and an auxiliary liquid chamber;
- and
- a diaphragm which constitutes a portion of a partition wall of the auxiliary liquid chamber,
- wherein one of end opening portions of the second attachment member in an axial direction is closed by the elastic body and the other thereof is closed by the diaphragm,
- wherein a fixing portion which fixes the second attachment member is formed on the metal bracket,
- wherein a fixed portion which is fixed to the fixing portion of the metal bracket is formed on the second attachment member,
- wherein a gap is provided between a portion of an outer circumferential surface of the second attachment member, and a portion of an inner circumferential surface of the metal bracket,
- wherein a second seal portion is provided between the fixed portion and the fixing portion, and
- wherein the diaphragm includes a lower tubular portion extending from an outer circumferential edge portion of the lower surface of the diaphragm to the inner surface of the metal bracket such that an air chamber is formed by the inner surface of the lower tubular portion of the diaphragm, the lower surface of the diaphragm, and the inner surface of the metal bracket.
Dependencies are inferred from the claim text.