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Electric motor with brush card isolated from endframe

  • US 5,414,317 A
  • Filed: 10/29/1993
  • Issued: 05/09/1995
  • Est. Priority Date: 10/29/1993
  • Status: Expired due to Term
First Claim
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1. An electric motor comprising:

  • a drive shaft,an armature and commutator assembly fixed on said drive shaft,a metal housing disposed around an armature portion of said assembly,permanent magnet means disposed between said armature portion and said housing,an endframe fixed to said housing, anda discrete brush card mounted in said endframe, said brush card havinga cylindrical portion for retaining a commutator portion of said assembly, andbrush tubes extending radially outwardly from said cylindrical portion, said brush tubes being adapted to retain brushes for engaging said commutator portion, and brush springs for urging said brushes into engagement with said commutator portion,said brush card having thereon tab portions with orifices therethrough and grommets mounted thereon, said grommets having openings extending therethrough and aligned, respectively, with said orifices,said endframe having posts extending from an end wall thereof,said grommet openings being configured to each receive one of said posts to lock said grommet onto said post, said grommets being at least in part disposed between said brush card and said endframe end wall to isolate said brush card from said endframe end wall.

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