Abstract: A vehicle unit fastening subassembly for vibratory fastening of a vehicle unit, in particular of a motor and/or transmission, to a vehicle structure of a motor vehicle, has at least one first carrier element on the unit side and a second carrier element on the vehicle side. The first carrier element and the second carrier element are connected to each other by a vibration damper, which is arranged at least in part in the first carrier element or in the second carrier element. The vibration damper is fluidically connected to a hydraulic unit by a flow channel, which is arranged adjacent to the vibration damper in a plan view of the vibration damper. A modular system is provided having a vibration damper and a hydraulic unit, wherein the vibration damper is usable either together with the hydraulic unit as a hydraulic vibration damper or without the hydraulic unit as a conventional bearing.

Abstract: 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).

Abstract: A fluid-filled vibration damping device including a movable film housed within a housing space of a partition partitioning a pressure receiving chamber and an equilibrium chamber. An outer peripheral end of the movable film includes a contact part and a sealing part being respectively in contact with a pressure receiving chamber-side wall inner surface and an equilibrium chamber-side wall inner surface of the housing space. A communication passage, which communicates with a gap circumferentially between the movable film and the housing space, is provided away from the contact part in the outer peripheral end of the movable film. The outer peripheral end of the movable film will be separated from the equilibrium chamber-side wall inner surface due to a pressure differential arising between the two chambers so as to form a relief passage interconnecting the two chambers including the gap and the communication passage.

Abstract: A hydraulically damping assembly bearing has two fluid-filled chambers which lie axially opposite each other and are hydraulically connected by a channel. A first chamber forms a working chamber enclosed by a bearing spring body and a second chamber forms a compensating chamber enclosed by a bellows. The compensating chamber has an axially extending inner wall encircling an interior. The bearing includes an annular body axially between the working and compensating chambers, enclosing an axial throughopening opening into the working chamber and closed by a membrane integrally formed with the inner wall of the bellows. The membrane has a central region defined by the inner wall and together with the inner wall delimits the interior. The membrane has a collar region encircling the central region and integrally formed with the central region. The outer circumference of the collar is rigidly connected to the annular body and/or the spring body.

Abstract: A damper system for damping vibrations of an assembly unit of a vehicle comprises one or more main vibration dampers and one or more acoustic bushings. The respective main vibration damper is tuned to vibrations from a lower frequency range. The respective acoustic bushing is tuned to vibrations from a higher frequency range which lies above and does not overlap with the lower frequency range.

Abstract: A partition member of an anti-vibration hydraulic mount includes a first channel and a second channel between the working chamber and the compensating chamber. The partition member includes a membrane secured in a receiving cavity. The membrane divides the receiving cavity into two sub-spaces separated fluidically from each other. The membrane comprises a closing device configured to have an open configuration, in which the closing device is spaced apart from the central opening, and a closed configuration, in which the closing device abuts against the central opening to close the central passageway.

Abstract: It is provided a bracket for anti-vibration device with improved durability. A bracket (1) includes a bracket main body (2) and a reinforcement member (3). The reinforcement member (3) has an inner surface (32) buried in the main body (2). The reinforcement member (3) has a defining edge surface (31) that defines this reinforcement member (3) as a surface. At least a part of the defining edge surface (31) is an inclined surface (32a) formed by the inner surface (32) of the reinforcement member (3), which is inclined toward an outer surface (33) of this reinforcement member (3).

Abstract: A vibration proofing device (10) includes an insulator (50) interposed between a first attaching member (30) and a second attaching member (40), and is disposed in an internal space (95) of a second bracket (90). The first attaching member (30) is formed to have two side walls (33, 33) parallel to each other to face the inner face of the second bracket (90). The second attaching member (40) is a tubular member having an opening (41a) passing therethrough in an upper-lower direction. At least one of side edge portions of each side wall (33) is disposed outside the opening (41a) of the second attaching member (40). Each side wall (33) is provided on an outer face thereof with a stopper (51) made of an elastic material. With this configuration, it is possible to sufficiently absorb an impact shock resulting from the stopper (51) hitting the second bracket (90).

Abstract: 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.

Abstract: The invention relates to a method for determining the direction and the amplitude of a force applied to a system (IO) comprising a stationary portion (13) and a mobile portion (12) which can deform when exposed to said force. Mechanical deformations applied to the mobile portion when exposed to said force are measured by measuring a distance between the stationary portion and the mobile portion in the direction of application of the force, and the distance measurements are processed in order to determine the amplitude and the direction of the force.

Abstract: A method for sealing a liquid composite spring, includes the steps of: placing a sleeve-shaped outer wall around an upper portion of a core shaft, and forming an upper liquid chamber and a lower liquid chamber inside the outer wall; and arranging a sealing member at a bottom of the outer wall to seal the lower liquid chamber, wherein the sealing member is made of flexible material. The liquid composite spring is provided with the rigid outer wall and the flexible sealing member. The volume and shape of the lower liquid chamber can be changed through the flexible sealing member, so that the chamber is formed as a flexible chamber.

Abstract: A liquid composite spring for vehicles includes: a core shaft; an outer sleeve arranged on an upper portion of the core shaft, the upper portion of the core shaft being located inside the outer sleeve while the lower portion of the core shaft being located outside the outer sleeve; an upper liquid chamber formed in an upper portion of the outer sleeve, a lower end of the upper liquid chamber being connected to a top of the core shaft; and a lower liquid chamber formed in a lower portion of outer sleeve, the lower liquid chamber and the upper liquid chamber being connected with each other through a metal-rubber main spring. At least one flow channel body is provided in the metal-rubber main spring, so that liquid in the upper liquid chamber and liquid in the lower liquid chamber are communicated with each other through the flow channel body.

Abstract: An elastomeric mount comprises an elastomeric body defining a first annular void encircling an inner sleeve and extending in a first direction. The elastomeric body defines a second annular void extending in a second opposite direction. An outer sleeve surrounds and is spaced apart from the inner sleeve and directly engages the elastomeric body. A first ferrule is fixed to a first end of the inner sleeve, includes a stop face spaced apart from the elastomeric body, and is adapted to limit relative axial movement between the inner sleeve and the outer sleeve in a first direction. A second ferrule is attached to the inner sleeve, includes a stop face spaced apart from the elastomeric body, and it adapted to limit relative movement between the inner sleeve and the outer sleeve in a second opposite direction.

Abstract: A floating connector includes a body part, an attachment plate, a first adjustment part and a second adjustment part. The body part has an upper plate, a lower plate, and a sleeve disposed between the upper plate and the lower plate. The attachment plate has a connection hole therein and is jacketed outside the sleeve through the connection hole, and the first adjustment part is integrally connected to an inner wall of the connection hole of the attachment plate. The first adjustment part is capable of providing horizontal movement of the attachment plate relative to the body part. The second adjustment part is capable of providing vertical movement of the attachment plate relative to the body part.

Abstract: A power tool has a housing, which includes a first housing and a second housing. The second housing is configured with a connecting hole, a first connecting part passing through the connecting hole connecting the first housing and the second housing, a protective layer, arranged on a surface of the second housing, an elastic portion, connected with the protective layer, arranged between the first housing and the second housing, and is integrally formed with the protection layer.

Abstract: A vibration proofing device includes a bracket having an internal space, and a vibration proofing member inserted into the internal space. The internal space is open on an outer surface of the bracket. At least a pair of facing-each-other surfaces, against which the vibration proofing member is pressed, is formed in an inner surface of the bracket. A distance between the pair of the facing-each-other surfaces on a far side in an insertion direction of the vibration proofing member is the same, in at least some regions of the bracket, as that on a near side in the insertion direction. This provides the vibration proofing device and the bracket to allow for compactly configuring the device as a whole, while sufficiently securing a retaining force between the bracket and the vibration proofing member.

Abstract: A vibration damping device including a vibration-damping device main unit inserted into a mounting space of a bracket from a lateral side and securely supported by the bracket. The bracket includes engaging pieces on respective opposed inside faces of the mounting space, and engaging action of the engaging pieces with respect to respective detent engaging faces formed on a fixture member of the vibration-damping device main unit prevents the vibration-damping device main unit from becoming dislodged from the mounting space of the bracket. Opposed walls of the mounting space are each penetrated by an aperture window, and inspection flat surfaces are separately provided to an outside surface of each engaging piece visible from an outside through the aperture window and a corresponding external side surface of the bracket that is off the aperture window. The inspection flat surfaces are parallel to each other.

Abstract: A fluid-sealed engine mount controls the movement of an engine mounted to a vehicle body and insulates from vibration. In particular, the fluid-sealed engine mount improves vibration damping performance and dynamic characteristics compared to a conventional engine mount, thereby enhancing noise, vibration, and harshness (NVH) performance.

Abstract: A formation method for liquid rubber composite nodes with middle damping holes is provided. The formation method includes adding a middle spacer sleeve between an outer sleeve and a mandrel, bonding the middle spacer sleeve and the mandrel together through rubber vulcanization, and assembling the integrated middle spacer sleeve and the mandrel into the outer sleeve; forming damping through holes which penetrate through the mandrel on the mandrel; hollowing the middle spacer sleeve to form a plurality of spaces; after vulcanization, forming a plurality of interdependent liquid cavities by using rubber and the plurality of spaces; and arranging liquid in the plurality of liquid cavities and communicating the plurality of liquid cavities through the damping through holes.

Abstract: A suspension array includes a support rod, an elastic member wound around the support rod, a housing supported by the elastic member and including a compartment surrounding the support rod, the support rod being coupled to the housing while penetrating the housing in the longitudinal direction, a friction member installed inside the housing to cause friction with the support rod when the friction member in the compartment is displaced, and a cap penetrated in the longitudinal direction by the support rod and coupled with the housing to cover the compartment, wherein the support rod penetrates the cap along the longitudinal direction and wherein the housing includes one or more first holes configured to discharge, to the outside, condensate generated in an inner space defined by the coupling between the cap and the housing.

Abstract: A separation element is configured to separate a working chamber from a compensation chamber of a hydraulic anti-vibration module for mounting an engine on a vehicle body. The separation element includes a first duct extending between a first mouth and a second mouth. In embodiments, the first mouth is provided in a first face of the separation element and is configured to be fluidically connected to the working chamber, and the second mouth is provided in a second face of the separation element and is configured to be fluidically connected to the compensation chamber. In embodiments, the first mouth includes a plurality of openings.

Abstract: A liquid sealed damper includes: an attachment portion attached to a peripheral portion of an opening of a vehicle or an opening and closing member for covering the opening; a contact portion to which an external force is input; an insulator configured to isolate vibration and connect the attachment portion and the contact portion; a main liquid chamber in which working liquid is sealed; an auxiliary liquid chamber having a wall portion formed of a diaphragm; and an orifice passage formed in the partition member and communicating with the main liquid chamber and the auxiliary liquid chamber. The partition member has a substantially circular surface forming a wall portion of the main liquid chamber. An opening portion at one end of the orifice passage is formed in the circular surface. The opening portion is formed to extend from an outer edge portion to a central portion of the circular surface.

Abstract: A liquid composite spring for vehicles includes: a core shaft; an outer sleeve arranged on an upper portion of the core shaft, the upper portion of the core shaft being located inside the outer sleeve while the lower portion of the core shaft being located outside the outer sleeve; an upper liquid chamber formed in an upper portion of the outer sleeve, a lower end of the upper liquid chamber being connected to a top of the core shaft; and a lower liquid chamber formed in a lower portion of outer sleeve, the lower liquid chamber and the upper liquid chamber being connected with each other through a metal-rubber main spring. At least one flow channel body is provided in the metal-rubber main spring, so that liquid in the upper liquid chamber and liquid in the lower liquid chamber are communicated with each other through the flow channel body.

Abstract: A vibration damping device including a vibration-damping device main unit attached to a bracket from a lateral side by a second attachment member being fitted to opposed walls provided on widthwise opposite sides of the bracket. The bracket includes flexible latches extending from the respective opposed walls forward in a direction of attachment. The second attachment member includes outer recesses respectively opening onto surfaces overlapped with the respective opposed walls. Each latch has a slope portion sloping inward in a width direction of the bracket such that a distal end face of the latch is inserted in the corresponding outer recess. The distal end face of the latch is latched by a forward wall inner face of the outer recess, and displacement of the second attachment member relative to the bracket in a direction of dislodgment opposite to the direction of attachment is limited.

Abstract: A liquid sealed damper includes: an attachment portion attached to a peripheral portion of an opening of a vehicle or an opening and closing member for covering the opening; a contact portion to which an external force is input; an insulator configured to isolate vibration and connect the attachment portion and the contact portion; a main liquid chamber in which working liquid is sealed, the insulator serving as a wall portion of the main liquid chamber; an auxiliary liquid chamber divided from the main liquid chamber by a partition member and having a wall portion formed of a diaphragm; and an orifice passage formed in the partition member and communicating with the main liquid chamber and the auxiliary liquid chamber. The partition member has an inner gap in the shape of a recess, and a part of the diaphragm is inserted into the inner gap.

Abstract: Provided is an electric device capable of suppressing vibration of a battery pack. Included are: a first housing 21 accommodating a load portion that consumes electric power; a second housing 22 having one end portion connected to the first housing 21 and another end portion to which a battery pack 9 is connectable; and an elastic member 40 interposed between the first housing and the second housing. The first housing includes a first restricting portion 42 positioned away from the elastic member, and the second housing includes a second restricting portion 44 positioned away from the elastic member and engageable with the first restricting portion. In a case where the second housing is urged to be separated from the first housing, the elastic member is deformed and the first restricting portion and the second restricting portion are engaged with each other to prevent separation.

Abstract: A hydraulically damping mount for mounting a motor vehicle unit on a motor vehicle body includes a support and a support mount which are interconnected by a support spring made of an elastomeric material. In embodiments, a support spring limits a working chamber which is separated from a compensating chamber by a separating device, wherein the working chamber and the compensating chamber may be filled with a fluid and may be connected to one another via a damping channel included in the separating device, wherein the separating device may include two nozzle discs between which a first membrane and a second membrane are arranged, and wherein one of the membranes has at least one through-hole.

Abstract: 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.

Abstract: A method for controlling an elastic mount configured to support a propulsion device with respect to a marine vessel, wherein the elastic mount contains an electromagnetic fluid and an electromagnet and is configured such that adjusting an amount of electricity applied to the electromagnet changes the shear strength of the electromagnetic fluid and thereby controls elasticity of the elastic mount, including applying a first amount of electricity to the electromagnet to produce a first elasticity in the elastic mount, determining that a vessel speed indicator exceeds a high speed threshold, determining that a trim position for the propulsion device is greater than a threshold trim position, detecting at least a threshold decrease in throttle demand, and applying a second amount of electricity to the electromagnet wherein the second amount of electricity is greater than the first amount of electricity, so as to decrease the elasticity of the elastic mount.

Abstract: A conical mount includes a housing defining an axis of rotation, a base member enclosed within the housing, a main rubber element coupled to the base member and enclosed within the housing, an upper metal portion positioned within the housing such that the main rubber element is positioned between the base member and upper metal portion, a radial snubber extending circumferentially around the upper metal portion, and a bearing assembly coupled with the radial snubber and positioned between the radial snubber and the upper metal portion. The bearing assembly enables the radial snubber to rotate freely about the axis of rotation to reduce a tangential load on the radial snubber.

Abstract: The present disclosure provides a mount for a vehicle that is provided at a portion at which damping performance is desired and that is fastened by a stud bolt. The mount for the vehicle includes a flange into which the stud bolt is inserted and that supports the stud bolt, an insulator configured to surround the flange, a housing coupled to the other one of the vibrating body or the supporting body and to which the insulator is fixed, a chamber formed inside the housing as a space surrounded by the housing and the insulator, and the chamber is filled with a fluid. In addition, the mount for the vehicle includes a damping part mounted on the housing to divide the chamber into two spaces and to be disposed in the chamber. The mount for the vehicle is configured to appropriately absorb vibrations and reduce noise.

Abstract: A variable stiffness vibration damping device includes a first support member, a second support member, a main elastic member, a diaphragm, a partition elastic member, a first communication passage, a coil, a yoke, and a magnetic fluid. The first communication passage is provided in one of the first support member and the second support member such that a first liquid chamber and a second liquid chamber communicate with each other via the first communication passage. The first communication passage includes a first circumferential passage. The coil is wound coaxially with the one of the first support member and the second support member. The yoke is included in the one of the first support member and the second support member and forms a first magnetic gap overlapping at least partially with the first circumferential passage.

Abstract: 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).

Abstract: A coating device for anti-vibration mounts coating a first fitting of each of a first and a second anti-vibration mounts respectively including the first fitting appearing on an outer surface of a first end portion in a longitudinal direction and a second fitting attached to a second end portion includes a coating spray that coats the first fitting and a mount support portion that supports the first and the second anti-vibration mounts on the second attachment fitting side. The first anti-vibration mount has an outer circumference protrusion portion that protrudes from the circumference of the second fitting. The second anti-vibration mount has a fitting protrusion portion that is the second fitting itself protruding. The mount support portion has a pair of supporting wall portions that support the outer circumference protrusion portion from both sides and a recess portion into which the fitting protrusion portion fits.

Abstract: The present disclosure provides a mount for a vehicle that is provided at a portion at which damping performance is desired and that is fastened by a stud bolt. The mount for the vehicle includes a flange into which the stud bolt is inserted and that supports the stud bolt, an insulator configured to surround the flange, a housing coupled to the other one of the vibrating body or the supporting body and to which the insulator is fixed, a chamber formed inside the housing as a space surrounded by the housing and the insulator, and the chamber is filled with a fluid. In addition, the mount for the vehicle includes a damping part mounted on the housing to divide the chamber into two spaces and to be disposed in the chamber. The mount for the vehicle is configured to appropriately absorb vibrations and reduce noise.

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: A present invention provides an anti-vibration device (1) which is equipped with a first tubular mounting member (11) connected to one of a vibration generating part and a vibration receiving part, and a second mounting member (12) connected to the other thereof; an elastic body (13) which connects the first mounting member and the second mounting member; and a partition member (16) which partitions a liquid compartment (19) in the first mounting member into a first liquid compartment (14) having the elastic body in a part of a bulkhead, and a second liquid compartment (15) in an axial direction along an central axis of the first mounting member, and has an orifice passage (24) through which the first liquid compartment and the second liquid compartment communicate with each other, in which a plurality of ridge parts (26) extending in a circumferential direction are formed on an inner surface (27) of the elastic body which defines the first liquid compartment in a radial direction.

Abstract: A fluid-sealed engine mount includes a variable orifice whose cross-section is changed according to a magnitude of engine vibration, thereby keeping a damping performance substantially unchanged at a time of large displacement vibration of an engine as compared to a time of small displacement vibration of the engine.

Abstract: An instrument package for use during the drilling a wellbore. The instrument package includes a plurality of instruments such as accelerometers, gyroscopes, and magnetometers; a computer is configured to determine the current position of the plurality of instruments from a set of measurements produced by the plurality of instruments; and wherein the plurality of instruments are mechanically isolated from a drill head assembly by one or more multi-degree of freedom vibration isolators. The computer preferably has at least two modes different analytical modes of analyzing the set of measurements produced by the plurality of instruments, including a continuous mode and a survey mode, the continuous mode being operational during times that active drilling is occurring and the survey mode being operational during times that the active drilling is not occurring.

Abstract: 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.

Abstract: A hydraulic mount apparatus includes a housing having an upper portion and a lower portion disposed on a center axis and defining a housing chamber. A partition member is disposed in the housing chamber dividing the housing chamber into a pumping chamber and a receiving chamber. The pumping chamber extends between the upper portion and the partition member. The receiving chamber extends between the lower portion and the partition member. A decoupler is attached to the partition member separating the pumping chamber and the receiving chamber. A moving member is disposed in the pumping chamber and attached to the decoupler. The moving member is made from a non-elastomeric polymer sheet secured to the decoupler for providing the additional damping force.

Abstract: A separation device for separating a working chamber and a compensation chamber of a hydraulically damping mount includes a first nozzle disc and a second nozzle disc made of a first material and forming a damping channel interconnecting the working chamber and the compensation chamber. The first nozzle disc may include a sealing member made of a second material and abut the second nozzle disc to seal the damping channel. A hydraulically damping mount for mounting a motor vehicle unit may having a separating device.

Abstract: A placing table includes a measuring-unit that measures a vertical position of an orifice member placed on the placing table, a position-regulating-portion that engages with a part of the orifice member of a type corresponding to the table, and an orifice-member-determination-unit that determines a placed state and type of the orifice member based on a measurement result obtained by the measuring-unit. When the corresponding type of the orifice member is placed in a correct posture, the position-regulating-portion engages with the orifice member and seats the orifice member on the table over the entire circumference of the lower end portion thereof. When a different type of orifice member is placed or when the corresponding type of orifice member is placed in an incorrect posture, the position-regulating-portion does not engage with the orifice member and lifts at least a part of the orifice member from the table.

Abstract: A hydromount suitable for mounting a motor vehicle engine on a vehicle body includes: a load-supporting spring that supports a mount core, encloses a working chamber, and is supported on an outer ring, an intermediate plate, and a compensation chamber separated from the working chamber by the intermediate plate and delimited by a compensation diaphragm. The compensation chamber and the working chamber are filled with a damping liquid and are connected with each other in a liquid-conducting manner via a damping channel disposed in the intermediate plate. The intermediate plate may include an upper nozzle disk, a lower nozzle disk, and a diaphragm disposed between the upper nozzle disk and the lower nozzle disk. The diaphragm may have an inner circumference, an outer circumference, and at least one valve opening. The at least one valve opening may be disposed completely between the inner circumference and the outer circumference.

Abstract: In the present invention, any two of a second liquid chamber (27), a third liquid chamber (28), and a fourth liquid chamber (29) communicate with each other through a first restricted passage (31) formed in an outer attachment member (11), an inner attachment member (12) or a partition member (15), and the remaining one liquid chamber communicates with a fifth liquid chamber (32) formed in the outer attachment member (11), the inner attachment member (12) or the partition member (15), the remaining one liquid chamber is divided in a circumferential direction, and each of the liquid chambers divided in the circumferential direction and the fifth liquid chamber (32) separately communicate with each other through a second restricted passage (33) formed in the outer attachment member (11), the inner attachment member (12) or the partition member (15).

Abstract: A variable stiffness vibration damping device includes a first support member, a second support member, a pair of main elastic members, a partition elastic member, a first communication passage, a pair of first radial walls, a second communication passage, a coil, a yoke, and a magnetic fluid. The second support member includes an axial portion. The first communication passage is provided in one of the first support member and the axial portion such that a first liquid chamber and a second liquid chamber communicate via the first communication passage. The pair of first radial walls partition one of the first liquid chamber and the second liquid chamber into a pair of third liquid chambers. The second communication passage is provided in the one of the first support member and the axial portion such that the pair of third liquid chambers communicate via the second communication passage.

Abstract: A variable stiffness vibration damping device includes a first support member, a second support member, a pair of main elastic members, a partition elastic member, a communication passage, a coil, a yoke, and a magnetic fluid. The second support member includes an axial portion and a pair of outer flanges. The communication passage is provided in one of the first support member and the axial portion such that a first liquid chamber and a second liquid chamber communicate with each other via the communication passage. The communication passage includes a circumferential passage. The coil is wound coaxially with the one of the first support member and the axial portion. The yoke is included in the one of the first support member and the axial portion and forms a magnetic gap overlapping at least partially with the circumferential passage.

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: Technologies are described for devices to absorb vibration. The devices may comprise an inertia track housing, an inertia track fluid reservoir, and an inertia track body. The inertia track fluid reservoir and the inertia track body may be within the inertia track housing. Walls of the inertia track body may define a first and a second spiral inertia track. The first and second spiral inertia tracks may be spiral channels within the outer surface of the inertia track body. The first spiral inertia track may connect a first fluid reservoir with the inertia track fluid reservoir. The second spiral inertia track may connect a second fluid reservoir with the inertia track fluid reservoir. The first and second spiral inertia tracks may be configured to channel the flow of a fluid along the first spiral inertia track and the second spiral inertia track and interact with the fluid to absorb vibration.

Abstract: The present invention provides a liquid-sealed vibration-damping device capable of improving damping performance while preventing increase in size and weight thereof, the liquid-sealed vibration-damping device including: a first attachment member; a second attachment member; an insulator; a vibration-damping unit having a partition member; and a housing space provided in the second attachment member and housing the vibration-damping unit, wherein the second attachment member includes an outer tubular part and a fixing part protruding from the outer tubular part; and a portion of the housing space extends to the fixing part.