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Electromagnetic clutch

  • US 4,150,738 A
  • Filed: 12/08/1976
  • Issued: 04/24/1979
  • Est. Priority Date: 12/08/1975
  • Status: Expired due to Term
First Claim
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1. An electromagnetic clutch comprising:

  • clutch disc means connected to a rotary shaft;

    a rotor including a sleeve portion coaxially mounted with respect to the rotary shaft and supported on a bearing, a pole face portion extending radially outwardly from one end of the sleeve portion, and a cylindrical portion extending coaxially with respect to the rotary shaft from an outer end portion of the pole face portion toward the other end of the sleeve portion thereby defining an annular space;

    a one piece finished core member, said core member being disposed in the annular space and having an inner cylinder portion one end of which is extended toward the pole face portion of the rotor so that the inner cylindrical portion faces the sleeve portion of the rotor with a small air gap therebetween, a bottom portion extending outwardly from the other end of the inner cylindrical portion of the core member, and an outer cylindrical portion having a cylindrical outer face which faces the cylindrical portion of the rotor with a small air gap;

    an excitor supported by the core member for exciting the core member; and

    a one piece supporting member including a sleeve portion extending coaxially surrounding the rotary shaft extending outwardly from one end of the sleeve portion and forcibly tightly inserted in the inner cylindrical portion of the core member so as to define an annular space within which the sleeve portion of the rotor is received, the flange portion having an engagement portion thereon for engaging said inner cylindrical portion of the core.

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