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.

A partition member (217) of the present invention includes a membrane (231) which forms a part of a partition wall of a main liquid chamber (215), and a first orifice passage (221) which communicates with the main liquid chamber (215) and opens toward a sub liquid chamber (216), and a flow resistance of a liquid in a portion positioned on the main liquid chamber (215) side and the flow resistance of a liquid in a portion (221a) positioned on the sub liquid chamber (216) side are different from each other in the first orifice passage (221).

A liquid filled bushing assembly includes an inner tubular member (11), an outer tubular member (12) disposed in a coaxial relation to the inner tubular member, and an elastic member (13) interposed between the inner tubular member and the outer tubular member, wherein not only the stiffness of the liquid filled bushing assembly in the lateral directions can be freely selected but also the stiffness of the liquid filled bushing assembly in the rotational direction and/or the axial direction can be freely selected.

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.

The vibration-damping device includes a tubular first attachment member; a second attachment member; an elastic body that couples the first attachment member and the second attachment member to each other; and a partition member that partitions a liquid chamber within the first attachment member into a main liquid chamber having the elastic body in a portion of a barrier wall thereof, and an auxiliary liquid chamber. The partition member includes a membrane; a first orifice passage that includes a main liquid chamber-side passage, and an opposite liquid chamber-side passage; and a damping force difference increasing part that restrains any one of swelling deformation of the membrane toward the main liquid chamber side and swelling deformation of the membrane toward the opposite liquid chamber and increases a difference between a damping force generated when a bound load is input and a damping force generated when a rebound load is input.

A fluid-enclosed engine mount may include an insulator mounted between a core configured to be connected to an engine and an external pipe configured to be connected to a vehicle body, the insulator being provided with an internal space enclosing fluid; an orifice module disposed at the inside of a lower side portion of the insulator to divide the internal space into an upper chamber and a lower chamber, the orifice module being provided with a fluid passage for allowing fluid to fluidically-communicate between the upper chamber and the lower chamber; a support member disposed between an external surface of the orifice module and the lower side portion of the insulator to elastically support the orifice module to be vertically movable; and a pipe member disposed between the lower side portion of the insulator and the support member to support an external surface of the support member.

A hydraulic mount includes a core, a first elastomeric member, a second elastomeric member connected to the first elastomeric member, a third elastomeric member connected to the core, a housing including a first housing member connected to the first elastomeric member and a second housing member connected to the second elastomeric member, a first ring, and a second ring connecting the first ring with the third elastomeric member. The first elastomeric member, the second elastomeric member, the third elastomeric member, the first ring, and the second ring may cooperate to provide a first fluid chamber and a second fluid chamber, fluid path connects the first fluid chamber to the second fluid chamber.

A liquid composite spring and a method for adjusting stiffness and damping property of the liquid composite spring such that the liquid composite spring includes an outer sleeve; a core shaft arranged around an upper portion of the outer sleeve. An upper portion of the core shaft is located inside the outer sleeve, while a lower portion extends out of the outer sleeve; an upper liquid chamber formed in an upper space inside the outer sleeve and having a lower portion connected to a top end of the core shaft; and a lower liquid chamber formed in a lower space inside the outer sleeve and connected with the core shaft. The core shaft has a damping flow channel arranged therein, for communicating liquid in the upper liquid chamber with liquid in the lower liquid chamber. The liquid composite spring can provide vibration-reducing effect and change stiffness and damping effect.

A hydraulic mount includes a core, a first elastomeric member, a second elastomeric member connected to the first elastomeric member, a third elastomeric member connected to the core, a housing including a first housing member connected to the first elastomeric member and a second housing member connected to the second elastomeric member, a first ring, and a second ring connecting the first ring with the third elastomeric member. The first elastomeric member, the second elastomeric member, the third elastomeric member, the first ring, and the second ring may cooperate to provide a first fluid chamber and a second fluid chamber. fluid path connects the first fluid chamber to the second fluid chamber.

Provided is a liquid-filled vibration isolator through which durability of an elastic movable body can be improved. In a case that a liquid pressure of liquid passing through a second orifice P2 is exerted to an outer circumference portion 12 of an elastic movable body 10, whole of the outer circumference portion 12 deforms so as to bend. Based on deformation of the outer circumference portion 12, a first valve portion 13 and facing surfaces 81c, 91c mutually contact or separate. Thereby, the communication state and the blocking state of the second orifice P2 are switched. Since it can be restrained that stress is concentrated in a part of the outer circumference portion 12 by wholly bending the outer circumference portion 12, cracks are less likely to occur in the outer circumference portion 12.