A hydraulic mount in which a fluid for supporting an engine of a vehicle is sealed, includes a core configured to receive vibration from outside, an insulator molded on the external side of the core, and a diaphragm spaced at a predetermined distance from the insulator, wherein a fluid is sealed between the insulator and the diaphragm, and an upper chamber and a lower chamber are provided between the insulator and the diaphragm by a nozzle assembly. The nozzle assembly includes an upper nozzle located adjacent to the upper chamber, a lower nozzle coupled to the upper nozzle and located adjacent to the lower chamber, and a membrane located between the upper nozzle and the lower nozzle.

A fluid-filled vibration-damping device including: a pressure-receiving chamber with a non-compressible fluid filled therein; an equilibrium chamber with the non-compressible fluid filled therein; an orifice passage connecting the pressure-receiving chamber and the equilibrium chamber with each other; a relief configured to open a short-circuit passage by an action of a negative pressure occurring in the pressure-receiving chamber upon input of an impact load so as to connect the pressure-receiving chamber with the equilibrium chamber so that cavitation is suppressed; and at least one leak passage provided at a part of the short-circuit passage in the relief, the at least one leak passage keeping a communication state between the pressure-receiving chamber and the equilibrium chamber with a smaller passage cross section than that of the orifice passage, even when the short-circuit passage is not opened.

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. A ratio of a projected area or an opening area of a smallest cross section of the fine holes, which occupies per a predetermined area of the first barrier or the second barrier, gradually decreases as it separates from the other of the first communicating portion and the second communicating portion in the flow passage direction.

A hydraulic mount for a vehicle includes: a core bush coupled to a bolt; a main rubber formed on an outer surface of the core bush; an orifice portion coupled to a lower portion of the main rubber to divide an upper fluid chamber and a lower fluid chamber; and a lower rubber film coupled to a lower portion of the orifice portion. The orifice portion includes an upper nozzle plate formed with a first fluid inlet and outlet port, a lower nozzle plate formed with a fluid path and a second fluid inlet and outlet port, and a cylinder-type membrane vertically arranged between the upper nozzle plate and the lower nozzle plate, and a pattern of crests and valleys is formed along a circumference of the membrane, the pattern of crests and valleys selectively contacting the upper nozzle plate and the lower nozzle plate.

A hydraulic mount for a vehicle includes: a core bush coupled to a bolt; a main rubber formed on an outer surface of the core bush; an orifice portion coupled to a lower portion of the main rubber so as to divide an upper fluid chamber and a lower fluid chamber, the orifice portion including a lower plate and an upper plate; and a membrane mounted between the lower plate and the upper plate. A fluid path is formed on an upper surface portion of the lower plate, a lower inlet and outlet port is formed on a predetermined position of the fluid path, an upper inlet and outlet port communicating with the fluid path is formed on the upper plate, a concave groove portion and a fixing end are repeatedly and uniformly formed along a circumference of the upper plate so as to cover the fluid path on the lower plate and be coupled thereto, and the membrane is exposed through the concave groove portion.

A vibration attenuating fluid mount with a partitioned compensator includes an inner member, an outer member, a flexible member having a castellated transition between a fluid passageway and at least one operating chamber. A membrane may be disposed in a volume compensator in fluid communication with one or more operating chambers. The inner member and outer member may be connected via a castellated connection, a swaged lock ring, or a split-lock ring.

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). A vortex chamber (29) is disposed in a connection portion with at least one of the first communication part (26) and the second communication part (27) on the main body flow path (25), figured to form the swirling flow of a liquid depending on a flow velocity of the liquid from the other of the first communication part (26) and the second communication part (27), and is configured to cause the liquid to flow out through the fine holes (26a).

A fluid mount is provided having continuously variable characteristics for improving driving performance in which an automatic fluid opening and closing unit is installed between upper and lower fluid chambers. The fluid mount includes a core having a central bolt, engaged with an engine, inserted into a central portion of the core, and a rubber member formed on an outer circumferential surface of the core. The core and the rubber member are disposed in a bracket housing. The upper and lower fluid chambers and the automatic fluid opening and closing unit are installed between the upper and lower fluid chambers to continuously open and close a flow path through current change.

Various techniques are provided for an expandable energy absorbing fluid bladder. In one example, the fluid bladder includes a primary portion and a secondary portion. The secondary portion can be configured to expand or increase in volume when the fluid bladder is subjected to a pulse greater than a threshold pulse. Expansion of the secondary portion can allow fluid or additional fluid to flow into the secondary portion and thus decrease a peak pulse and, thus, avoid rupture of the fluid bladder.

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. An intermediate chamber disposed in the partition member (16), a first communication path configured to bring the intermediate chamber and the first liquid chamber (14) in communication with each other and a second communication path configured to bring the intermediate chamber and the second liquid chamber (15) in communication with each other are formed at the partition member (16). An opening axis of a first opening section opened toward the inside of the intermediate chamber of the first communication path and an opening axis of a second opening section opened toward the inside of the intermediate chamber of the second communication path are offset from each other. At least one of the first opening section and the second opening section is opened toward the wall surface that defines the intermediate chamber. According to the anti-vibration apparatus (10), generation of strange noises can be suppressed while product characteristics are secured, and simplification of the structure and facilitation of the manufacture can be accomplished.