| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electromagnetic clutch device that can suppress the generation of damage to a rolling bearing and its periphery even if the rotation resistance of the rolling bearing which rotatably supports a magnetic circuit forming member with respect to a yoke becomes large, and a drive force transmission device.SOLUTION: An electromagnetic clutch device comprises: an electromagnetic coil 53 for generating an electromagnetic force which presses a clutch plate arranged inside a front housing 21; a yoke 530 which holds the electromagnetic coil 53; a rear housing 22 which rotates integrally with the front housing 21; a ball bearing 63 having an inner ring 630 fitted to the rear housing 22 and an outer ring 631 fitted to the yoke 530; and a disk spring 66 which imparts a pressing force to the yoke 530. In the rear housing 22, the outside diameter of a fitting part 223a to which the inner ring 630 is fitted is not larger than the inside diameter of the inner ring 630, and relative rotation with the inner ring 630 is suppressed by a friction force which is generated by a pressing force of the disk spring 66 between the inner ring 630 and itself.</p> |
