Tokai Rubber Industries, Ltd.

Keiichi Ishiba

Rentaro Kato

Ryouji Kanda

Katsuhiro Goto

Yoshiki Funahashi

Yutaka Ishioka

Akiyoshi Ide

Tetsu Matsui

Atsushi Muramatsu

Muramatsu

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 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 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.

Growing community of inventors

Komaki, Japan

Keiichi Ishiba