×

Electric motor having brush holder with axial movement limiting armature contact member protector

  • US 6,800,982 B2
  • Filed: 05/08/2002
  • Issued: 10/05/2004
  • Est. Priority Date: 05/29/2001
  • Status: Active Grant
First Claim
Patent Images

1. An electric motor comprising:

  • a commutator having a plurality of contact members made of carbon and electrically isolated from each other and a supporting member for supporting said plurality of contact members;

    an armature having a rotary shaft, wherein said commutator is coaxially fixed at one end thereof, said armature being molded in a resin;

    a pair of brushes biased along said rotary shaft by a resilient member on said plurality of contact members of said commutator; and

    a brush holder axially opposed to said commutator of said armature, for rotatably holding said rotary shaft and holding said brushes movably along the axial direction, wherein a limiter structure limiting movement of said armature toward said brush holder in the axial direction is formed in at least either of said brush holder or said armature to provide a clearance between said contact members and said brush holder when the movement of said armature is stopped by said limiter structure, an axial direction of said brushes and an axial direction of said rotary shaft being substantially parallel, and the limiter structure projecting in a direction parallel to the axial direction of the rotary shaft.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×