| 摘要 |
<p>An electromagnetic clutch includes a first rotatable member (30) rotatably supported on a first bearing. The first rotatable member (30) is provided with at least one annular groove along an outer surface thereof for receiving a belt (210) rotatably connecting the first rotatable member (30) to an external driving source. The first rotatable member (30) further has an inner and outer cylindrical annular portion (32, 31) and a magnetic axial end plate (33) connecting the cylindrical annular portions at an axial one end. The magnetic axial end plate (33) has a plurality of arcuate slits (301, 302) disposed on at least one circle. A plurality of remaining regions are located between each pair of adjacent slits. A second rotatable member (20) is rotatably supported on a second bearing. An annular magnetic member (50) is supported on the second rotatable member so as to be capable of limited axial movement. The annular magnetic member (50) faces the axial end plate (33) of the first rotatable member (30) with an axial gap therebetween. An electromagnet (70) is associated with the first rotatable member (30) and the annular magnetic member for attracting the other rotatable member and the annular magnetic member. The remaining regions are mechanically reinforced by increasing the thickness thereof.</p> |
