Pedal driven apparatus having a motor

摘要

A pedal driven apparatus for a hybrid bicycle can be manually propelled, but also includes a motor unit for forward propulsion of the bicycle. The apparatus comprises manually operable pedals fixed for rotation with a pedal spindle for receiving a manually provided driving force, and a motor having a shaft for receiving a motor provided driving force. A first torque transmission path transfers the manually provided driving force to a sprocket of the pedal driven apparatus, and a second torque transmission path transfers the motor provided driving force to the sprocket of the pedal driven apparatus. A first one way drive means is provided in the first torque transmission path and second one way drive means is provided in the second torque transmission path. The manual driving force and motor driving force may be used separately or combined.

主权项

1. A pedal driven apparatus comprising:
manually operable pedals fixed for rotation with a pedal spindle for receiving a manually provided driving force; a motor having a shaft for receiving a motor provided driving force; a first torque transmission path for transferring said manually provided driving force to a sprocket of said pedal driven apparatus; a second torque transmission path for transferring said motor provided driving force to said sprocket of said pedal driven apparatus; wherein a first one way drive means is provided in said first torque transmission path between said pedal spindle and said sprocket such that when said sprocket is being driven by said motor provided driving force through said second torque transmission path, said pedal spindle is able to freewheel; and a second one way drive means is provided in said second torque transmission path between said motor shaft and said sprocket such that when said sprocket is being driven by said manually provided driving force through said first torque transmission path, said motor shaft is not caused to rotate; said second one way drive means having an axis of rotation offset by a predetermined amount with respect to an axis of rotation of said motor shaft; wherein said motor is arranged concentrically around said pedal spindle such that said pedal spindle is freely accommodated through a hollow bore of said motor shaft and such that their axes of rotation are parallel.