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Stator assembly for a brushless motor in a power tool

  • US 9,819,241 B2
  • Filed: 06/17/2013
  • Issued: 11/14/2017
  • Est. Priority Date: 06/14/2010
  • Status: Active Grant
First Claim
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1. A power tool comprising:

  • a housing;

    a motor housed inside the housing, the motor having a stator assembly and a rotor pivotably arranged inside the stator, the stator assembly comprising a lamination stack defining a plurality of poles;

    a plurality of field windings each arranged at at least two opposite poles of said plurality of poles and connected together around the stator assembly;

    a bus bar longitudinally arranged along an outer surface of the lamination stack, the bus bar having a plurality of conductive terminals electrically coupled to the plurality of field windings and a power source; and

    two end insulators arranged at longitudinal ends of the lamination stack, wherein the two end insulators include retention features arranged to mate along the outer surface of the lamination stack to retain the bus bar along the outer surface of the lamination stack.

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