×

Motor and method for making same

  • US 4,015,154 A
  • Filed: 12/12/1975
  • Issued: 03/29/1977
  • Est. Priority Date: 12/23/1974
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for making a stator structure for a motor, said method comprising the steps of:

  • A. providing a stack of first ferromagnetically soft rings, each of said rings comprising an innerconnecting ring portion and a plurality of teeth portions extending outwardly from the respective interconnecting ring portion;

    B. disposing a plurality of coils around said teeth portions;

    C. providing a stack of second ferromagnetically soft rings;

    D. inserting said stack of first rings with said coils disposed around said teeth portions into said stack of second rings;

    E. molding the combined stacks of first and second rings with a dimensionally stable resin mixture of thermosetting resin and thermoplastic resin to hold said first and second rings rigidly together to form a motor casing structure entirely enclosing said rings and said coils and comprising a recess coaxial with said rings and extending inwardly from one end of said casing structure to permit a rotor to be inserted therein, said casing structure comprising an integrally molded section at the other end thereof having a first concave portion formed therein coaxial with said recess to hold bearing means to provide a first accurately placed receptacle for supporting one end of the rotor;

    F. molding a bracket of said dimensionally stable resin mixture to attach to said one end of said casing structure to close said recess, said bracket being molded to have a second concave portion to provide a second accurately placed bearing receptacle for supporting the other end of the rotor; and

    G. assembling said bracket and said casing structure together such that said first and second concave portions are aligned to support said rotor.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×