Fluid-filled type vibration damping device

摘要

A fluid-filled type vibration damping device including a partition member having a housing space, and a movable plate housed within the housing space so that displacement thereof is limited by abutment against inside wall faces of the housing space. Abutted sloping faces are defined by outside peripheral portions of the inside wall faces of the housing space situated in opposition in an axial direction while sloping axially outside going towards an inner peripheral side. An outside peripheral abutting portion formed of a rubber elastic body is provided to an outside peripheral portion of the movable plate, and abutting sloping faces are defined by opposite faces of the outside peripheral abutting portion that slope axially outside going towards the inner peripheral side. The abutted sloping faces and the abutting sloping faces have different slope angles so as to slope relative to each other.

主权项

1. A non-compressible fluid-filled type vibration damping device comprising:
a first mounting member; a second mounting member having a tubular shape; a main rubber elastic body elastically connecting the first and second mounting members; a partition member having a housing space and supported by the second mounting member; a pressure-receiving non-compressible fluid chamber situated at one side of the partition member in an axial direction and whose wall is partially defined by the main rubber elastic body; an equilibrium non-compressible fluid chamber situated at another side of the partition member in the axial direction and whose wall is partially defined by a flexible film; an orifice passage interconnecting the pressure-receiving non-compressible fluid chamber and the equilibrium non-compressible fluid chamber; and a movable plate that receives on one side thereof a non-compressible fluid pressure of the pressure-receiving non-compressible fluid chamber and on another side thereof a non-compressible fluid pressure of the equilibrium non-compressible fluid chamber, and adapted to absorb pressure fluctuations in the pressure-receiving non-compressible fluid chamber through tiny displacement, wherein: the movable plate is housed within the housing space of the partition member so that an amount of displacement of the movable plate is limited by abutment of the movable plate against inside wall faces of the housing space; abutted sloping faces are defined by outside peripheral portions of the inside wall faces of the housing space that are situated in opposition in the axial direction and that slope axially outside going towards an inner peripheral side; an outside peripheral abutting portion formed of a rubber elastic body is provided to an outside peripheral portion of the movable plate, and abutting sloping faces are defined by opposite faces of the outside peripheral abutting portion that slope axially outside going towards the inner peripheral side; and when the movable plate is displaced, the outside peripheral portions of the inside wall faces of the housing space contacts the outside peripheral abutting portion of the moving plate at a point from which the abutted sloping faces of the housing space and the abutting sloping faces of the movable plate have different slope angles so as to slope relative to each other.