Abstract: An active anti-vibration device 10 includes a pair of elastic connecting parts 20 and 30, a rod body 40 that connects the pair of elastic connecting parts, an inertial mass 52 that is supported by the rod body, a drive part 58 that reciprocates the inertial mass in an axial direction of the rod body, and a controller 90 that is configured to be able to perform acceleration feedback control to control the drive part so that a first force proportional to an axial acceleration of the rod body is generated.

Abstract: A limiting passage (24) includes: a first communication section (26) that opens to a first liquid chamber; a second communication section (27) that opens to a second liquid chamber; and a main body flow passage (25) that is configured to provide communication between the first and second communication sections. At least one of the first and second communication sections includes a plurality of fine holes (31). A vortex chamber (25b) is disposed at a portion of the main body flow passage, which is connected to at least one of the first and second communication sections, is configured to form a swirling flow of liquid according to a flow velocity of liquid flowing from the other of the first and second communication sections, and causes the liquid of the swirling flow to flow out through the plurality of fine holes. A barrier wall (36a) in which the plurality of fine holes are formed extends in a direction across a vortex axis along a central axis (O2) of the vortex chamber.

Abstract: A vibration isolation device (10) of the present invention includes: a tubular first attachment member (11) coupled to one of a vibration generating part and a vibration receiving part, and a second attachment member (12) coupled to the other thereof; an elastic body (13) which couples both the attachment members together; and a partition member (16) which partitions a liquid chamber in the first attachment member (11) in which a liquid (L) enclosed into a first liquid chamber (14) and a second liquid chamber (15), in which at least one of the first liquid chamber (14) and the second liquid chamber (15) has the elastic body (13) as a portion of a wall surface thereof; and a communication passage (30) which communicates with the first liquid chamber (14) and the second liquid chamber (15), and a barrier rigid body (33) which is disposed in the communication passage (30) are provided in the partition member (16).

Abstract: A vibration-damping device (1) of the present invention includes an outer cylinder (11), an inner member (12), an elastic body (13), a partition member (17), an intermediate cylinder (31), and a dividing member (32). The elastic body connects together the outer cylinder and the inner member. The partition member divides a liquid chamber (14) into the outer cylinder into a main liquid chamber (15) and an auxiliary liquid chamber (16). An orifice passage (21) is formed in the partition member. The intermediate cylinder (31) is disposed between the outer cylinder and the inner member and connected to the elastic body. The partition member is connected to the intermediate cylinder and divides the main liquid chamber into a first main liquid chamber (15a) and a second main liquid chamber (15b). An accommodation chamber (37), a first communication hole (37a), and a second communication hole (37b) are formed in the partition member.

Abstract: In a vibration dampening device (10, 110) in an embodiment, a restriction passage (24) includes a first communication portion (26) that is open to a main liquid chamber (14), a second communication portion (27) that is open to an auxiliary liquid chamber (15), and a main body flow path (25) that causes the communication portions to communicate with each other, the first communication portion (26) includes a plurality of pores (31) penetrating a first barrier (28) having a surface (28a) facing the main liquid chamber (14), and a protrusion (40, 140) which protrudes toward the main liquid chamber (14) or the auxiliary liquid chamber (15) is formed over an entire circumference of an opening circumferential edge portion of the pore (31) in the surface (28a).

Abstract: In the present invention, a restriction passage (24) includes a first communication portion (26) that is open to a first liquid chamber, a second communication portion (27) that is open to a second liquid chamber, and a main body flow path (25) that is configured to cause the first communication portion (26) and the second communication portion (27) to communicate with each other, and in a portion of the main body flow path (25) connected to at least one of the first communication portion (26) and the second communication portion (27), a guide portion (43) that is configured to guide a liquid from the other of the first communication portion (26) and the second communication portion (27) to an opposed surface (34a) that is opposed to one of the first communication portion (26) and the second communication portion (27) in an inner surface of the restriction passage (24) is disposed.

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).

Abstract: There is provided a torque rod (1) in which any one of a partition wall (27) between an interior of a first accommodation portion (15) for accommodating a first elastic bush (11) and an interior of a third accommodation portion (17) for accommodating an actuator (14) and a partition wall (28) between an interior of a second accommodation portion (16) for accommodating a second elastic bush (12) and the interior of the third accommodation portion (17) has a communication hole (29) for allowing the interiors of both the accommodation portions to communicate with each other, and a whole area of the other partition wall is closed. In the communication hole (29), a counterbore (29a) is formed in an end portion on a side opposite to the third accommodation portion (17). The torque rod includes a bolt (30) that is inserted into the communication hole (29), and that has a head portion (30a) accommodated in the counterbore (29a).

Abstract: A vibration-damping device (10) includes a tubular first attachment member (11) that is coupled to any one of a vibration-generating portion and a vibration-receiving portion; a second attachment member (12) that is coupled to the other one of the vibration-generating portion and the vibration-receiving portion; an elastic body (13) that couples both the attachment members (11 and 12) to each other; and a partition member (16) that divides a liquid chamber (19) inside the first attachment member (11) into a main liquid chamber (14) having the elastic body (13) as a part of a wall surface, and a sub-liquid chamber (15). A restriction passage (24) through which the main liquid chamber (14) and the sub-liquid chamber (15) communicate with each other is formed in the partition member (16). The partition member (16) is provided with a flow-speed restraint portion (32) which restrains a flow speed of liquid (L) flowing in the restriction passage (24).

Abstract: The present invention includes a first mounting member (11); a second mounting member (12); an actuator (14) which dampens and absorbs input vibration by reciprocally moving a movable element (13) in accordance with input vibration; an actuator case (15) which houses the actuator therein; and a relay connector (17) which is mounted on the actuator case and electrically connects the connector (16) of the actuator and an external power source. The relay connector includes a terminal (27) which connects the connector of the actuator and the external power supply, and a housing (28) in which the terminal is installed. The actuator case is formed with an insertion hole (31) through which the terminal is inserted, and a mounting cylinder (32) surrounding the insertion hole is provided to protrude from the actuator case. One of the mounting cylinder and the housing is airtightly fitted to the inside of the other thereof via a packing (35).

Abstract: 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.

Abstract: A restricted passageway (24) is provided with a first communication part (26) which is formed in a first barrier wall (34) facing a first liquid chamber and opens to the first liquid chamber, a second communication part (27) which is formed in a second barrier wall (35) facing a second liquid chamber and opens to the second liquid chamber, and a main body flow path (25) that is configured to cause the first communication part (26) and the second communication part (27) to communicate with each other. At least one of the first communication part (26) and the second communication part (27) includes a plurality of fine holes (26a) that pass through the first barrier wall (34) or the second barrier wall (35).

Abstract: An anti-vibration apparatus (10) includes a first attachment member (11) having a tubular shape and connected to one of a vibration generating section and a vibration receiving section and a second attachment member (12) connected to the other section, an elastic body (13) configured to connect the attachment members to each other, and a partition member (16) configured to partition a liquid chamber in the first attachment member (11) in which a liquid is sealed into a first liquid chamber (14) and a second liquid chamber (15). At least one of the first liquid chamber (14) and the second liquid chamber (15) has the elastic body (13) at a portion of a wall surface.

Abstract: There is provided a torque rod (1) in which any one of a partition wall (27) between an interior of a first accommodation portion (15) for accommodating a first elastic bush (11) and an interior of a third accommodation portion (17) for accommodating an actuator (14) and a partition wall (28) between an interior of a second accommodation portion (16) for accommodating a second elastic bush (12) and the interior of the third accommodation portion (17) has a communication hole (29) for allowing the interiors of both the accommodation portions to communicate with each other, and a whole area of the other partition wall is closed. In the communication hole (29), a counterbore (29a) is formed in an end portion on a side opposite to the third accommodation portion (17). The torque rod includes a bolt (30) that is inserted into the communication hole (29), and that has a head portion (30a) accommodated in the counterbore (29a).

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.

Abstract: A vibration isolation device (10) of the present invention includes a tubular first attachment member (11) coupled to one of a vibration generating part and a vibration receiving part, and a second attachment member (12) coupled to the other thereof, an elastic body (13) which couples both the attachment members together, and a partition member (16) which partitions a liquid chamber within the first attachment member (11) having a liquid (L) enclosed therein into a first liquid chamber (14) and a second liquid chamber (15), in which at least one of the first liquid chamber (14) and the second liquid chamber (15) has the elastic body (13) as a portion of a wall surface thereof, the partition member (16) includes an intermediate chamber (43) which is disposed inside the partition member (16), a first communication passage (42a) which communicates with the intermediate chamber (43) and the first liquid chamber (14), and a second communication passage (42b) which communicates with the intermediate chamber (43) an

Abstract: A vibration damping device (10) includes a first attachment member (11) and a second attachment member (12), an elastic body (13) configured to couple the attachment members (11 and 12) to each other, and partition members (16) configured to partition a liquid chamber in the first attachment member (11) in which a liquid (L) is sealed into the first liquid chamber (14) and the second liquid chamber (15). A communicating passage (30) configured to communicate the first liquid chamber (14) with the second liquid chamber (15) is provided in the partition members (16). Flow-changing protrusions (31 and 32) protruding inward in a radial direction of the communicating passage (30) and configured to change a flow of the liquid flowing in the communicating passage (30) in an axial direction of the communicating passage (30) are provided in an inner circumferential surface of the communicating passage (30).

Abstract: A vibration-damping device (10) includes a first attachment member (11), a second attachment member (12), an elastic body (13), and a partitioning member (16). Limiting passages (31, 32) are formed in the partitioning member (16), and the limiting passages (31, 32) include a first limiting passage (31) and a second limiting passage (32). An inner peripheral surface of the first limiting passage (31) is provided with flow changing protrusions (33, 34) that protrude toward an inner side in a radial direction of the first limiting passage (31) and that changes the flow of a liquid (L) that flows through the first limiting passage (31) in an axial direction of the first limiting passage (31). In a vertical cross-sectional view passing through an axis of the first limiting passage (31) and through the flow changing protrusions (33, 34), the first limiting passage (31) and the flow changing protrusion1 (33, 34) have symmetrical shapes with respect to the axis.

Abstract: A partitioning member (16) of a vibration-damping device (10) is provided with a communication chamber (30), a first communication hole (31) and a second communication hole (32). The first communication hole (31) and the second communication hole (32) are arranged to be offset from each other in the axial direction (O). The first communication hole (31) is formed by the inside of a first protruding tube (31a) that protrudes into the communication chamber (30) from the first wall surface (30a). The second communication hole (32) is formed by the inside of the second protruding tube (32a) that protrudes into the communication chamber (30) from the second wall surface (30b). By including the configuration as described above, simplification of structure can be achieved.

Abstract: A vibration-damping device (10) in the present application includes a first limiting passage (51) and a second limiting passage (52). The first limiting passage (51) includes pressure loss units (53a, 53b). Each of the pressure loss units (53a, 53b) is provided with an intermediate chamber (55), a first communication passage (57), and a second communication passage (58). An opening axis (L1) of a first opening (59) that opens toward the inside of the intermediate chamber (55) in the first communication passage (57) and an opening axis (L2) of a second opening (60) that opens toward the inside of the intermediate chamber (55) in the second communication passage (58) are offset from each other. At least one of the first opening (59) and the second opening (60) opens toward a wall surface that defines the intermediate chamber (55).