| 摘要 |
<p>PURPOSE:To enable to contract the diameter of a pulley while sufficient friction torque is being obtained, by filling a non-magnetic substance into a space to be formed by an inner wall surface of a pulley part, an end face of the inside of a friction surface part and an external circumferential surface of an outer race of a bearing. CONSTITUTION:A clutch rotor 11 is constituted with an external cylindrical part 111 forming groove 11a to pull a belt joining with a rotary driving source and a friction surface part 112 confronting with a suction plate 13, and an inside diametral part of the friction surface part 112 is formed smaller than the outside diameter of a bearing 2 arranged to bear the rotor 11 rotatably on the external side of a cylindrical protrusion 1a. A non-magnetic substantce 113 is filled in a space surrounded with an inner side surface of the external cylindrical part 111, an end face face of the inside of the friction surface part 112 and an outer race of the bearing 2.</p> |
