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Electrical rotary machine

  • US 4,352,036 A
  • Filed: 07/25/1980
  • Issued: 09/28/1982
  • Est. Priority Date: 07/27/1979
  • Status: Expired due to Term
First Claim
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1. An electrical rotary apparatus which comprises:

  • a motor case of magnetic material;

    a stator member forming part of said case;

    a rotor member within said case, one of said members having a permanent magnet and the other member being of a magnetic material;

    a rotor shaft on which said rotor member is mounted;

    a bearing of a synthetic resin material in which said rotor shaft is supported;

    a coil bobbin of synthetic resin material around said shaft and on the opposite side of said rotor from said stator;

    a ring coil wound around said coil bobbin;

    a yoke member of magnetic material extending parallel with said rotor shaft from said rotor and then radially outwardly on the opposite side of said bobbin coil from said rotor;

    a reduction mechanism including reduction gears and a further gear secured to said rotor shaft at a point spaced along said shaft from said rotor and on the opposite side of said bearing from said rotor and engaged with said reduction gears;

    anda gear case of synthetic resin material for said reduction gears and having a radially extending wall within which said radially extending part of said yoke is embedded;

    said gear case, said coil bobbin and said bearing being integrally molded and said gear case being fitted into said motor case for securing said motor case to said gear case and with the outer periphery of said yoke contacting said motor casing.

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