A fluid-filled vibration damping device including: primary and auxiliary liquid chambers; a partition provided between the two chambers; and a movable plate supported movably in a plate thickness direction thereof by the partition. The movable plate receives liquid pressure of the two chambers on its opposite faces so as to constitute a liquid pressure absorber. The partition includes at least one communication hole opening onto its surface facing the movable plate. The movable plate includes at least one elastic protrusion projecting toward the communication hole. The elastic protrusion includes a peripheral wall to be pressed in compression and shear directions and be elastically deformed to a radially inner side of the communication hole as well by coming into contact with a wall portion of the communication hole due to movement of the movable plate in the plate thickness direction.

A vibration-damping device includes a partition member provided with an orifice passage that allows a main liquid chamber and an auxiliary liquid chamber to communicate with each other, a plurality of first communication holes that allows the main liquid chamber and an accommodation chamber to communicate with each other, and a second communication hole that allows the auxiliary liquid chamber and the accommodation chamber to communicate with each other. A tubular member that protrudes in an axial direction toward the elastic body is disposed on a first wall surface of the partition member to which the first communication holes are open and which constitutes a portion of an inner surface of the main liquid chamber. The plurality of first communication holes are open to both an inner portion located inside the tubular member and an outer portion located outside the tubular member, on the first wall surface.

A partition member includes an orifice passage through which the main liquid chamber and the auxiliary liquid chamber communicate with each other, a plurality of first communication holes through which the main liquid chamber and the accommodation chamber communicate with each other, and a second communication hole through which the auxiliary liquid chamber and the accommodation chamber communicate with each other, in the partition member, a tubular member which protrudes in an axial direction toward an elastic body is disposed on a first wall surface in which the first communication hole opens and which forms a part of an inner surface of the main liquid chamber, the plurality of first communication holes open in both an inner portion located on an inner side than the tubular member and an outer portion located on an outer side than the tubular member of the first wall surface.

A vibration-damping device includes a partition member provided with an orifice passage that allows a main liquid chamber and an auxiliary liquid chamber to communicate with each other, a plurality of first communication holes that allows the main liquid chamber and an accommodation chamber to communicate with each other, and a second communication hole that allows the auxiliary liquid chamber and the accommodation chamber to communicate with each other. A tubular member that protrudes in an axial direction toward the elastic body is disposed on a first wall surface of the partition member to which the first communication holes are open and which constitutes a portion of an inner surface of the main liquid chamber, in which the plurality of first communication holes are open to both an inner portion located inside the tubular member and an outer portion located outside the tubular member, on the first wall surface.

A vibration-damping device includes a first attachment member (11), a second attachment member (12), an elastic body (13), and a partition member (17), the partition member including a membrane (31) and an orifice (20). The orifice (20) includes a first communication hole (21), a second communication hole (22), an intermediate chamber (35), a restriction passage (23), and a communication hole (24), the restriction passage includes a main liquid chamber-side passage (25) and an auxiliary liquid chamber-side passage (26), the main liquid chamber-side passage and the auxiliary liquid chamber-side passage extend in a circumferential direction and are disposed to be connected to each other in a radial direction, and when the liquid flows through the restriction passage from any one of the first communication hole and the second communication hole toward the other, the flow direction in the main liquid chamber-side passage and the flow direction in the auxiliary liquid chamber-side passage are opposite to each other.

A vibration-damping device (10) of the present invention includes a first attachment member (11), a second attachment member (12), an elastic body (13), and a partition member (16). In the partition member, a restriction passage (24) through which the first liquid chamber (14) and the second liquid chamber (15) communicate with each other is formed. The restriction passage includes a first communicating portion (26) which opens to the first liquid chamber, a second communicating portion (27) which opens to the second liquid chamber, and a main body flow passage (25) through which the first communicating portion and the second communicating portion communicate with each other. At least one of the first communicating portion and the second communicating portion includes a plurality of fine holes (26a) which are disposed in a flow passage direction of the main body flow passage. In plurality of fine holes, a flow passage length of a fine hole located apart from the other of the first communicating portion and the second communicating portion in the flow passage direction becomes longer.

The present invention includes a first attachment member (11, 111), a second attachment member (12, 112), an elastic body (13, 113), a partition member (16, 116), and a movable member (41, 141). An orifice passage (24, 124), a plurality of first communication holes (42a, 142a), and a second communication hole (42b, 142b) are formed in the partition member (41, 141). A tubular member (21, 121) is disposed on a first wall surface (16b, 116b) in the partition member (16, 116). The plurality of first communication holes (42a, 142a) are open to both an inner portion (16f, 116f) and an outer portion (16g, 116g) on the first wall surface (16b, 116b), and one of the partition member (16) and the tubular member (121) forms an elasticity adjusting unit (Z).

A bush-type transmission mount, in which an orifice, operating as a fluid passage that connects a first fluid chamber and a second fluid chamber to each other, is directly formed to a desired length in a core that is coupled to a main rubber to improve vibration-damping characteristics. A membrane is fitted into an outlet portion of the orifice, which communicates with the first fluid chamber, in a sliding manner, thereby improving low-frequency idle vibration and high-frequency dynamic characteristics.

A liquid seal bushing includes an outer member, an inner member, and an elastic body which connects the outer member and the inner member to each other. The bushing includes two liquid chambers, a connection path which connects the two liquid chambers and extends in one direction, a first communication path which allows communication between one end portion of both end portions of the connection path, the one end portion being located on a side of one liquid chamber of the two liquid chambers, and the other liquid chamber, a second communication path which allows communication between the other end portion of the both end portions of the connection path, and a linear motor provided inside the outer member including a movable element in the connection path and movable in the one direction to closes both openings of the first communication path and the second communication path.

A fluid-filled vibration damping device includes a switching valve arranged inside the fluid passage passing through a partition member to communicate with a main fluid chamber and a sub fluid chamber and protruding from one wall surface toward the other wall surface of the fluid passage that face each other. A gap is provided between the switching valve and the other wall surface. A tip end part of the switching valve abuts against the other wall surface through a tilt displacement in a swing manner of the switching valve in the passage length direction of the fluid passage to thereby form a switching mechanism for closing the gap. An elastically deformable fin-shaped protrusion protruding from the tip end part of the switching valve toward the other wall surface is provided. A leak passage is formed between a protruding tip end of the fin-shaped protrusion and the other wall surface.