Mount for subframe and magnetorheological elastomer unit

Patent metadata

Field	Value
Publication number	US-10844923-B2
Application number	US-201816191930-A
Country	US
Kind code	B2
Filing date	Nov 15, 2018
Priority date	Nov 17, 2017
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

When forces are input to a mount in a plurality of directions, an ECU changes the magnitude of a coil excitation current to change the strength of a magnetic field. At this moment, the elastic force of the mount can be changed in directions in response to the plurality of directions in which the forces are input using a plurality of magnetorheological elastomers (a brim-shaped MRE portion and a cylindrical MRE portion) in which magnetic particles are arranged in different manners.

First claim

What is claimed is:

1. A mount for a subframe disposed on the subframe at a position where the subframe is supported by a vehicle body, the mount comprising:
an inner cylinder composed of a magnetic body having a hollow shaft portion for fastening the mount to the vehicle body;
an outer cylinder composed of a magnetic body coaxially disposed on a radially outer side of the inner cylinder;
a magnetorheological elastomer disposed between the inner cylinder and the outer cylinder; and
a coil configured to apply a magnetic field to the magnetorheological elastomer to change viscoelasticity of the magnetorheological elastomer;
wherein the magnetorheological elastomer comprises a plurality of the magnetorheological elastomers including magnetic particles arranged in different manners,
the plurality of the magnetorheological elastomers include at least a first magnetorheological elastomer and a second magnetorheological elastomer;
the magnetic particles in the first magnetorheological elastomer are arranged parallel to a direction of an axis of the inner cylinder; and
the magnetic particles in the second magnetorheological elastomer are radially arranged from a central axis of the inner cylinder in directions perpendicular to the axis.

2. The mount for the subframe according to claim 1 , further comprising:
an elastic body having a cylindrical shape disposed between the inner cylinder and the outer cylinder.

3. A magnetorheological elastomer unit comprising:
a first cylindrical portion composed of a magnetorheological elastomer in which magnetic particles are arranged in a direction of an axis of the first cylindrical portion; and
a second cylindrical portion having a diameter different from the diameter of the first cylindrical portion and composed of a magnetorheological elastomer in which magnetic particles are radially arranged in directions perpendicular to an axis of the second cylindrical portion;
wherein the first cylindrical portion and the second cylindrical portion are disposed on top of each other on a common hollow shaft.

4. The magnetorheological elastomer unit according to claim 3 , wherein:
the second cylindrical portion has a diameter smaller than the diameter of the first cylindrical portion; and
the first cylindrical portion and the second cylindrical portion disposed on top of each other on the common hollow shaft form a flange shape.

Assignees

• Honda Motor Co Ltd

Inventors

• Inoue Toshio
• Ito Yuho

Classifications

• F16F2230/18

  Control arrangements · CPC title

• F16F2234/02

  cylindrical · CPC title

• F16F1/361 Primary

  comprising magneto-rheological elastomers [MR], (magneto-rheological fluid dampers F16F9/535) · CPC title

• F16F6/00

  Magnetic springs {(magnetic spring arrangements for the suppression of vibration in systems F16F15/03)}; Fluid magnetic springs {, i.e. magnetic spring combined with a fluid} · CPC title

• B62D21/09

  Means for mounting load bearing surfaces · CPC title