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Electric motor, particularly a brushless direct current motor

  • US 4,647,803 A
  • Filed: 07/08/1985
  • Issued: 03/03/1987
  • Est. Priority Date: 12/28/1983
  • Status: Expired
First Claim
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1. An electric motor, particularly a brushless direct current motor, comprising:

  • a stator and a rotor which define a substantially cylindrical air gap therebetween, said stator including stator iron means;

    a rotor shaft supporting said rotor and mounted for common rotation therewith;

    bearing means rotatingly mounting said rotor shaft;

    stationary, substantially tubular bearing support means disposed in coaxial relationship to said rotor shaft and having an outer facing peripheral wall, said bearing means being mounted inside of said bearing support means and being supported thereby, said stator having an inner facing wall and being mounted on the outside of said bearing support means and being supported thereby, the inner facing wall of the stator facing the outer facing wall of the bearing support means;

    said stator wall and said bearing support means wall being separated from one another over at least a substantial portion of their facing faces by a second air gap defined therebetween which extends also over a substantial portion of the axial length of said stator iron means; and

    elastic damping means connecting said stator to said bearing support means.

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