Patent ID: 10132380

Abstract:
A vibration-damping device (10) includes a first attachment member (11), a second attachment member (12), an elastic body, and a partitioning member (16). A limiting passage (30) that allows a main liquid chamber (14) and an auxiliary liquid chamber (15) to communicate with each other is formed in the partitioning member (16). An inner peripheral surface of the limiting passage (30) is provided with a flow changing protrusion (31) that protrudes toward an inner side in a radial direction of the limiting passage (30) and that changes the flow of a liquid (L) that flows into the limiting passage (30) from the main liquid chamber (14) and flows through the limiting passage (30) in an axial direction of the limiting passage (30). In a vertical cross-sectional view passing through an axis of the limiting passage (30) and through the flow changing protrusion (31), the limiting passage (30) and the flow changing protrusion (31) have symmetrical shapes with respect to the axis. A protruding end of the flow changing protrusion (31) forms an inner peripheral edge of a passage hole (31c) that is open on both sides in the axial direction.