| 摘要 |
Provided is an electromagnetic clutch, in which a plurality of magnetic flux shielding slits extending in the axial direction and arcuately in the circumferential direction are formed individually in a rotor and an armature, and in which the magnetic flux by the excitation of a coil inserted on the anti-armature side of the rotor is passed from the non-slit portion of the rotor to the non-slit portion of the armature and from the non-slit portion of the armature to the non-slit portion of the rotor, so that a magnetic attraction is generated to bring two frictional faces into press contact with each other and so that the two frictional faces are separated by the demagnetization of the coil. The slits of at least one of the rotor and the armature are formed to change in such a taper shape that the slit width at the frictional face side may be smaller than that at the anti-frictional face side. Without inviting any drastic cost increase, the mutual press-contact force of the frictional faces can be enhanced so that a higher torque transmission may be possible with the same size as that of the conventional structure.
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