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Vibration isolating support device
| Details |
Inventors: Murakami, Kazutomo; Mizuno, Keiichiro; Iida, Kazuyoshi; Miyazaki, Toshihiro;
Assignee: Bridgestone Corporation (Tokyo, JP)
Primary Examiner: Halvosa; George E. A.
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas
A vibration isolating device comprises a base, a plurality of support members each placed onto the base and comprised of a two series layer of an electroviscous body and an elastomeric body, and a cradle supported through these support members. These support members are provided with circuit for applying voltage to each electroviscous body, respectively. |
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DETAILED DESCRIPTION What is claimed is: 1.
A vibration isolating device, comprising; a base, a plurality of support members placed on said base in parallel with each other, each support member comprising a two series layer of an electroviscous body and an elastomeric body, a cradle supported by said support members, said support members provided with means for applying voltage to each electroviscous body, respectively, and wherein said electroviscous body contains spaced upper and lower substrates, plural upper and lower electrode plates vertically arranged from said upper and lower substrates, respectively, and said electroviscous body under a no voltage condition has a spring constant smaller than that of said elastomeric body.
2.
The device according to claim 1, wherein said voltage is selectively applied to said support members.
3.
The device according to claim 1, wherein said electroviscous body comprises a flexible shell and said shell containing an electroviscous fluid.
4.
The device according to claim 3, wherein said electroviscous fluid comprises a dispersion of silica gel in an insulating oil.
5.
The device according to claim 1, wherein said upper and lower electrode plates are in parallel with each other.
6.
The device according to claim 5, wherein said upper and lower electrode plates are annular.
7.
The device according to claim 6 further comprising a central rod-like electrode.
Description:
BACKGROUND OF THE INVENTION 1.
Field of the Invention This invention relates to a support device provided with a vibration isolating structure for reducing vibrations transmitted from a vibration source side to a vibration isolating side.
2.
Related Art Statement In case of transporting or setting precision instruments and the like, or in case of setting power machines and the like generating vibration, there is a vibration isolating support method as a countermeasure for preventing occurrence of such vibrations.
In general, a vibration isolating support device has a structure supporting a cradle together with a rubber isolator, an elastic member such as metal spring, air spring or the like, and if necessary, an attenuator and is interposed between vibration source and vibration isolating means to shut off vibrations
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