Bicycle drive unit

摘要

A drive unit has three axles, three rotation transmitting members and an acting force detecting unit. The first axle is configured to be rotated by a crank arm. The first rotation transmitting member is arranged on the first axle to transmit rotation of the first axle by the crank arm. The second axle is spaced from the first axle. The second rotation transmitting member is arranged on the second axle, and is operatively engaged with the first rotation transmitting member to transmit rotation of the first rotation transmitting member. The third axle is spaced from the first axle and the second axle. The third rotation transmitting member is arranged on the third axle, and operatively engaged with the second rotation transmitting member to transmit rotation of the second rotation transmitting member. The acting force detecting unit arranged to detect a force acting on the second axle.

主权项

1. A bicycle drive unit comprising:
a first axle configured to be rotated by a crank arm; a first rotation transmitting member arranged on the first axle to transmit rotation of the first axle by the crank arm; a second axle spaced from the first axle; a second rotation transmitting member arranged on the second axle, and operatively engaged with the first rotation transmitting member to transmit rotation of the first rotation transmitting member; a third axle spaced from the first axle and the second axle; a third rotation transmitting member arranged on the third axle, and operatively engaged with the second rotation transmitting member to transmit rotation of the second rotation transmitting member; an acting force detecting unit arranged to detect a force acting on the second axle; and a housing that accommodates the first, second, and third rotation transmitting members, the first rotation transmitting member, the second rotation transmitting member, and the third rotation transmitting member being arranged in a rotation transmitting path between the first axle and a front sprocket.