| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving force transmission device capable of surely engaging a pilot clutch when operating an electromagnetic clutch device.SOLUTION: A driving force transmission device 1 includes a ferromagnetic armature 43 formed of a ferromagnetic material and provided in a relatively nonrotatable and axially movable manner with respect to an outside rotating member 10 while being attracted to the yoke 41 side by magnetic force, and a nonmagnetic armature 44 formed of a nonmagnetic material independently of the ferromagnetic armature 43, and interposed between the ferromagnetic armature 43 and a moving cam member 52 to be able to contact the moving cam member 52 and provided in a relatively nonrotatable manner with respect to the outside rotating member 10. |
