| 摘要 |
<p>PURPOSE:To prevent a large change from being applied to the transmitted torque, by providing a friction transmitting member protruded from the opposite face of a rotor so as to form a clearance between the rotor and an armature, in the case of an electromagnetic clutch device for a copying machine or the like. CONSTITUTION:If an excitation coil 2 is electrified, a magnetic circuit, being constituted by a field core 1, rotor 4 and an armature 5, generates attractive force caused by the electromagnetic force, connecting a friction transmitting member 4', protrusively provided on the rotor 4 and consisting of friction material, to the armature 5, and a coupling plate 7, being connected to the armature 5 by a release spring 6, is also rotated in the direction of rotation of a shaft 9. This friction transmitting member 4' forms a clearance between the rotor 4 and the armature 5, further a sectional area of the rotor 4 for the magnetic flux to pass is formed in the sectional area below the density of saturated magnetic flux, accordingly a change of transmitted torque can be decreased small for a change of voltage, and the torque can be stably transmitted.</p> |
