Tokai Rubber Industries, Ltd.

Nissan Motor Company Limited

Tokai Rubber Technologies, Ltd.

Ryouji Kanda

Rentaro Kato

Katsuhiro Goto

Yoshiki Funahashi

Yutaka Ishioka

Akiyoshi Ide

Tetsu Matsui

Keiichi Ishiba

Atsushi Muramatsu

Kiyohiko Yoshida

Yasuhiko Mihara

Kiyohiko Yosida

Muramatsu

Hideki Nishimura

Mounting device including a fluid-filled cylindrical elastic mount, and a synthetic resin bracket having a cylindrical bore in which the elastic mount is fixed, wherein the elastic mount includes a shaft member, an intermediate sleeve disposed radially outwardly of the shaft member and having a window, an elastic body connecting the shaft member and the intermediate sleeve and having a pocket open in the outer circumferential surface of the intermediate sleeve through the window, and an outer sleeve fitted on the intermediate sleeve through a sealing rubber layer to fluid-tightly close the window, for forming a fluid chamber filled with a non-compressible fluid, and wherein the sealing rubber layer is compressed by a compressive force generated based on a pressure of injection of the synthetic resin of the bracket into a mold when the bracket is formed in the mold, in contact with the outer circumferential surface of the outer sleeve, and is thereby fitted on the elastic mount upon formation of the bracket in the mold.

Elastic mounting device including fluid-filled elastic mount and

An elastic mount having diametrically opposed pressure-receiving and equilibrium chambers communicating with each other through an orifice passage. An intermediate sleeve is made of a synthetic resin and connected to a center shaft member through an elastic body that includes an arcuate portion partly defining the pressure-receiving chamber. An integral first stopper extends into the pressure-receiving chamber, and further includes a bridging portion which partly defines the equilibrium chamber and which includes an integral second stopper extending into a void formed through the elastic body. The first and second stoppers are opposed to each other in a diametric direction from which the two chambers are opposed to each other.

Fluid-filled cylindrical elastic mount including synthetic resin

An elastic mount for elastically connecting two structures, including a first support member including an axial portion and a radial portion resting on the first structure, a second support member disposed radially inwardly of the axial portion of the first support member and bolted to the second structure, a first squeezer member fixed to one of the axial ends of the second support member and extending in a radial direction of the mount, a first axially compressed elastic member compressed between the radial portion of the first support member and the first squeezer member, a second squeezer member fixed to the other end of the second support member and including a radial portion and an axial portion, a second axially compressed elastic member compressed between the radial portion of the second squeezer member and the first structure, and a radially compressed elastic member compressed between the axial portions of said second squeezer member and the first support member.

Elastic mount having two axially compressed elastic members

A fluid-filled damping device wherein a center shaft member and an outer cylindrical member are elastically connected by first and second elastic end walls and an elastic intermediate wall interposed between the end walls. The first elastic end wall has two recesses opposed to each other in a first diametric direction of the center shaft member, and cooperates with the elastic intermediate wall and the outer cylindrical member to define a first fluid chamber. The intermediate wall cooperates with the second elastic end wall and two partition blocks to define a first and a second pocket which are opposed to each other in the first diametric direction. The two partition blocks are interposed between the intermediate and second end walls and opposed to each other in a second diametric direction perpendicular to the first diametric direction. The two pockets are closed by the outer cylindrical member to provide a second and a third fluid chambers communicating with the first fluid chamber.

Fluid-filled damping device having a large spring stiffness values in

A fluid-filled cylindrical elastic mount which includes radially spaced-apart inner and outer sleeves, and an elastic body interposed between the inner and outer sleeves for elastical connection thereof. The elastic body has diametrically opposite fluid chambers containing a highly viscous fluid, and at least one fluid passage which communicates with the fluid chambers. The outer sleeve has at least one inlet through which the highly viscous fluid is injected into the mount. Each of the inlets is formed in a portion of the outer sleeve which defines the corresponding fluid passage, and is closed by a sealing member fixed to the outer sleeve. The elastic mount further includes a pair of restricting protrusions which are respectively formed in the fluid chambers to protrude from the inner sleeve toward the outer sleeve in radially opposite directions, such that each protrusion has a radial end face which cooperates with the outer sleeve to define a restricted portion which has a predetermined radial dimension.

Cylindrical elastic mount containing highly viscous fluid and having

A fluid-filled elastic mount including an elastic body elastically connecting a first and a second support, and partially defining a fluid chamber filled with a non-compressible fluid. The elastic mount includes an oscillating plate which partially defines the fluid chamber and which is displaceable to change a pressure of the fluid in the fluid chamber, and a permanent magnet disposed on one of opposite sides of the oscillating plate remote from the fluid chamber. A first and a second yoke member are connected to opposite magnetic pole faces of the magnet by a plastic material, and cooperate with the magnet to define a closed magnetic circuit. The yoke members define therebetween an annular gap in the magnetic circuit, in which a magnetic fluid and an annular moving coil are received. The magnetic fluid includes magnetic particles dispersed in a liquid medium. The coil is fixed to the oscillating plate, to oscillate the oscillating plate upon energization of the coil.

Elastic mount having fluid chamber partially defined by oscillating

A fluid-filled cylindrical elastic mount having an elastic body interposed between inner and outer sleeves and cooperating with the outer sleeve to define two fluid chambers which communicate with each other through two orifice passages. An orifice-defining structure is interposed between the outer sleeve and the elastic body, so as to cover at least one of the two chambers, and has a circumferential recess open in the radially outward direction of the outer sleeve. The orifice-defining structure has two windows formed therethrough in the radial direction, and a rubber filler in the recess. The filler has two grooves one of which cooperates with one of the windows and the outer sleeve to define a first orifice passage for communication between the two chambers, and the other of which cooperates with the outer sleeve to define a second orifice passage which permits flow of a fluid between the two chambers, through elastic displacement of a flexible diaphragm which closes the other window. The two orifice passages are tuned to damp or isolate vibrations in different frequency bands.

Elastic mount having at least two orifices formed by rubber filler on

A fluid-filled elastic mount wherein an elastic body elastically connecting a first and a second support partially defines a fluid chamber filled with a non-compressible fluid. The elastic mount includes an oscillating plate which partially defines the fluid chamber and which is displaceable to change a pressure of the fluid in the fluid chamber, and a permanent magnet disposed on one of opposite sides of the oscillating plate remote from the fluid chamber. A first and a second yoke member are connected to opposite magnetic pole faces of the magnet and cooperate with the magnet to define a closed magnetic circuit. The yoke members define therebetween an annular gap in the magnetic circuit, in which an annular moving coil is received. The coil is fixed to the oscillating plate, to oscillate the oscillating plate upon energization of the coil. Also disclosed is a method of manufacturing the elastic mount, in which a blank for the magnet is magnetized together with the yoke members after the blank and yoke members are assembled into a unit.

A fluid-filled cylindrical elastic mount including an inner sleeve, an outer sleeve disposed radially outwardly of the inner sleeve, and a generally annular elastic body disposed between the inner and outer sleeves for flexible connection therebetween. The elastic body partially defines two fluid chambers filled with a non-compressible fluid. The fluid chambers are formed in diametrically opposite circumferential portions of the elastic body between the inner and outer sleeves. The elastic body has at least one orifice passage formed therethrough for fluid communication between the two fluid chambers, and extending through the elastic body, adjacent one of the inner and outer sleeves. The elastic body further has at least one void each formed between the corresponding orifice passage and the other of the inner and outer sleeves.

Fluid-filled cylindrical elastic mount having orifice passages and voids

A fluid-filled elastic mount wherein an elastic body elastically connecting a first and a second support partially defines a fluid chamber filled with a non-compressible fluid. The elastic mount includes an oscillating plate which partially defines the fluid chamber and which is supported by the second support such that the oscillating plate is displaceable relative to the second support, and an actuator for oscillating the oscillating plate to thereby change a pressure of the fluid in the fluid chamber. The elastic mount further includes an elastic support member for flexibly connecting the oscillating plate to the second support such that the oscillating plate is movable toward and away from the fluid chamber. This elastic support member is formed of an elastic material which substantially permits shearing deformation of the elastic support member and inhibits its compressive and tensile deformation.

Elastic mount having fluid chamber partially defined by elastically

A fluid-filled elastic mount wherein an elastic body elastically connecting first and second supports partially defines a fluid chamber filled with a non-compressible fluid. The elastic mount includes an oscillating plate which partially defines the fluid chamber and which is displaceable to change a pressure of the fluid in the fluid chamber, and a permanent magnet disposed on one of opposite sides of the oscillating plate remote from the fluid chamber. The permanent magnet is made of a plastic magnetic material including a magnetic material and a plastic material as a binder for the magnetic material. First and second yoke members are held in contact with opposite magnetic pole faces of the magnet, and cooperate with the magnet to define a close magnetic circuit. The yoke members define therebetween an annular gap in the magnetic circuit, in which an annular moving coil is received. The coil is fixed to the oscillating plate, to oscillate the oscillating plate upon energization of the coil. Also disclosed is a method of manufacturing the elastic mount, in which a spacing between the yoke members is filled with the plastic magnetic material in a plasticized state, which is then solidified to provide the permanent magnet.

Elastic mount and method of manufacturing the elastic mount

A fluid-filled elastic rotational coupling including an inner and an outer sleeve fixed to one and other of a driving and a driven rotary member, an intermediate sleeve disposed in concentric and radially outwardly spaced relation with the inner sleeve, a pair of wings extending diametrically opposite parts of the inner sleeve toward the intermediate sleeve, an elastic body interposed between the inner and intermediate sleeves and having two pairs of pockets each pair being formed on opposite sides of each wing as viewed in the circumferential direction of the coupling, and a sealing rubber layer between the intermediate and outer sleeves. The outer sleeve closes the pockets to thereby provide two pairs of fluid chambers. An orifice passage is provided between the intermediate and outer sleeves, for fluid communication between each pair of fluid chambers whose fluid pressures change in opposite direction upon relative rotation of the inner and outer sleeves.

Fluid-filled elastic rotational coupling having two fluid chambers on

A fluid-filled elastic mount for flexible connection of two members, including a first and a second support member, an elastic body interposed between the first and second support members, a closure member for partially defining a fluid chamber filled with a non-compressible fluid, a partition assembly for dividing the fluid chamber into a pressure-receiving chamber and an equilibrium chamber, and device for defining a restricted passage for restricted fluid communication between the pressure-receiving and equilibrium chambers. One of the first and second support members has a first abutting surface which extends substantially perpendicularly to the load-receiving direction, and a second abutting surface substantially perpendicular to the first abutting surface. The elastic mount is provided with a stopper member secured to the other of the first and second support members. The stopper member includes a stop portion which is spaced apart from the second abutting surface in a direction perpendicular to the load-receiving direction. The stop portion is held in pressed abutting contact with the first abutting surface in the load-receiving direction, whereby the elastic body is pre-compressed in the load-receiving direction.

Fluid-filled elastic mount having elastic body pre-compressed by stopper

An upper support for a suspension system, which includes an inner rigid member having an annular wing portion, and axially opposite coned faces tapered from the wing portion to the axially opposite ends, a pair of annular rigid members disposed radially and axially outwardly of the inner rigid member, so as to face the coned faces of the inner rigid member, a pair of annular sealing rubber members fixed to the annular rigid members, and a pair of connecting rubber blocks for elastically connecting the inner rigid member and the annular rigid members. The rubber blocks partially define therebetween an annular pocket which is closed by an outer rigid member fitted on the annular rigid members via the sealing rubber members. The closed pocket is substantially divided by the wing portion into a pair of fluid chambers which are filled with a non-compressible fluid and which communicate with each other through an annular resonance portion defined between the wing portion and the outer rigid member.

Fluid-filled upper support for shock absorber having a pair of truncated

A sliding type bushing including an inner sleeve having an axially intermediate large-diameter portion, a race disposed radially outwardly of the inner sleeve, and radially spaced from the large-diameter portion, and a sliding sleeve formed of a fiber reinforced resin material between the large-diameter portion and the race. The sliding sleeve has an outer surface fixed to the race, and an inner surface which faces an outer surface of the large-diameter portion with a predetermined clearance therebetween, such that the sliding and inner sleeves are freely slidable relative to each other about the axis of the bushing. The sliding type bushing further includes a cylindrical sliding cloth fixed to the inner surface of the sliding sleeve and formed of a fibrous material having a low coefficient of sliding friction, and a pair of axial retainers for axially retaining the sliding sleeve at axially opposite end faces thereof, and a generally cylindrical elastic body disposed radially outwardly of the race, such that the elastic body is fixed to an outer surface of the race.

Growing community of inventors

Komaki, Japan

Ryouji Kanda