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Brushless motor with tubular bearing support

  • US 5,818,133 A
  • Filed: 04/19/1996
  • Issued: 10/06/1998
  • Est. Priority Date: 04/19/1996
  • Status: Expired due to Fees
First Claim
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1. A brushless electric motor, which comprises:

  • a stator assembly including a lamination core defining an inner space, and a heat sink;

    a rotor assembly having a central shaft adapted for rotational movement relative to the stator assembly about the shaft; and

    a tubular bearing support received within the inner space of the stator assembly adjacent to the lamination core and adjacent to the heat sink to facilitate a reduced axial length of the motor, the shaft being retained within a bearing assembly within the bearing support to allow rotation of the shaft and therefore of the rotor assembly with respect to the stator assembly;

    wherein the heat sink comprises a baseplate and a plurality of fins extending from the baseplate and oriented in an axial direction, in substantial alignment with the shaft, said fins being disposed within the inner space of the lamination core.

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