To secure dimensional accuracy with ease, and to increase responsiveness by reducing resistance generated by lubricating oil.
A torque interrupting clutch 81 is provided with protruding teeth 87, 89 mutually formed in the opposite surfaces of a relatively rotatable clutch cylinder 83 and a clutch ring 85 in a circumference direction with an predetermined interval to perform rotation, interlock, and interception between the clutch cylinder 83 and the clutch ring 85 through engagement with and disengagement from the protruding teeth 87, 89 by relatively moving in a rotating shaft center direction with respect to the clutch cylinder 83 to the clutch ring 85. An abutment part 137 of which the projection height in the rotating shaft center direction is lower than the protruding tooth 87 is arranged at the clutch cylinder 83 with a phase shifted in a rotating direction with respect to the protruding tooth 87, and the abutment part 137 is projected to the other protruding tooth 89 at an engagement protruding position of the corresponding protruding teeth 87, 89 of the clutch cylinder 83 and the clutch ring 85 to cause projection in the rotating shaft center direction of the clutch cylinder 83 and the clutch ring 85.
SUDO NORIYUKI
FURUKAWA HIROYASU
Daisuke Sudo