DRIVING FORCE TRANSMISSION DEVICE

摘要

A driving force transmission device includes: a clutch unit that connects and disconnects input and output shafts to and from each other; an annular electromagnet disposed so that it can rotate relative to a shaft body portion included in the input shaft; a rotor that faces one side in the axial direction of the electromagnet; an armature that faces one side in the axial direction of the rotor, that is disposed so that it can move in the axial direction, and that moves in the axial direction to engage and disengage the clutch unit; an internally threaded portion that is formed on the inner periphery of the rotor and engages with an externally threaded portion formed on the outer periphery of the shaft body portion; and a second elastic member that elastically presses the rotor screw-fitted on the outer periphery of the shaft body portion toward the electromagnet.

主权项

1. A driving force transmission device, comprising:
an input shaft and an output shaft which are placed coaxially with each other; a clutch unit that connects and disconnects the input shaft and the output shaft to and from each other; an electromagnet that is disposed so that the electromagnet can rotate relative to a shaft body included in one of the input shaft and the output shaft; a rotor that faces the electromagnet in an axial direction of the shaft body; an armature that is placed so as to face an opposite side of the rotor from the electromagnet and so that the armature can move in the axial direction, and that engages and disengages the clutch unit; an internally threaded portion that is formed on an inner periphery of the rotor and engages with an externally threaded portion formed on an outer periphery of the shaft body; and an elastic member that elastically presses the rotor screw-fitted on the outer periphery of the shaft body toward the electromagnet; and a rotation stopper structure that stops rotation of the rotor relative to the shaft body.