Elastic mount and method of manufacturing the elastic mount
First Claim
1. A fluid-filled elastic mount comprising:
- first and second supports which are spaced apart from each other;
an elastic body which is interposed between said first and second supports for elastically connecting the first and second supports and which partially defines a fluid chamber filled with a non-compressible fluid;
an oscillating plate which partially defines said fluid chamber and which is displaceable to change a pressure of the fluid in said fluid chamber;
a permanent magnet disposed on one of opposite sides of said oscillating plate remote from said fluid chamber, said permanent magnet being made of a plastic magnetic material including a magnetic material and a plastic material as a binder for said magnetic material;
first and second yoke members which are connected to respective opposite magnetic pole faces of said permanent magnet and which cooperate with said permanent magnet to define a closed magnetic circuit, said first and second yoke members defining therebetween an annular gap in said magnetic circuit; and
an annular moving coil received in said annular gap and fixed to said oscillating plate, said moving coil being displaced in said annular gap in an axial direction thereof, to oscillate said oscillating plate upon energization of said moving coil.
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Accused Products
Abstract
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.
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Citations
10 Claims
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1. A fluid-filled elastic mount comprising:
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first and second supports which are spaced apart from each other; an elastic body which is interposed between said first and second supports for elastically connecting the first and second supports and which partially defines a fluid chamber filled with a non-compressible fluid; an oscillating plate which partially defines said fluid chamber and which is displaceable to change a pressure of the fluid in said fluid chamber; a permanent magnet disposed on one of opposite sides of said oscillating plate remote from said fluid chamber, said permanent magnet being made of a plastic magnetic material including a magnetic material and a plastic material as a binder for said magnetic material; first and second yoke members which are connected to respective opposite magnetic pole faces of said permanent magnet and which cooperate with said permanent magnet to define a closed magnetic circuit, said first and second yoke members defining therebetween an annular gap in said magnetic circuit; and an annular moving coil received in said annular gap and fixed to said oscillating plate, said moving coil being displaced in said annular gap in an axial direction thereof, to oscillate said oscillating plate upon energization of said moving coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of producing a fluid-filled elastic mount including:
- (a) first and second supports which are spaced apart from each other;
(b) an elastic body which is interposed between said first and second supports for elastically connecting the first and second supports and which partially defines a fluid chamber filled with a non-compressible fluid;
(c) an oscillating plate which partially defines said fluid chamber and which is displaceable to change a pressure of the fluid in said fluid chamber;
(d) a permanent magnet disposed on one of opposite sides of said oscillating plate remote from said fluid chamber;
(e) first and second yoke members which are connected to respective opposite magnetic pole faces of said permanent magnet and which cooperate with said permanent magnet to define a closed magnetic circuit, said first and second yoke members defining therebetween an annular gap in said magnetic circuit; and
(f) an annular moving coil received in said annular gap and fixed to said oscillating plate, said moving coil being displaced in said annular gap in an axial direction thereof, to oscillate said oscillating plate upon energization of said moving coil, said method comprising the steps of;preparing a plastic magnetic material which gives said permanent magnet, by mixing a magnetic material with a plastic material; positioning said first and second yoke members in a mold with a spacing left therebetween; filling said spacing between the first and second yoke members with said plastic magnetic material as it is plasticized; and solidifying said plastic magnetic material to form said permanent magnet such that said respective opposite magnetic pole faces of said permanent magnetic being in contact with said first and second yoke members.
- (a) first and second supports which are spaced apart from each other;
Specification