A crank assembly of a shaft driven bicycle includes a crank arm pivoted to an axis of a bicycle frame for arranging pedal. The crank arm has at least one main transmission gear to be engaged with a passive gear of a passive shaft. Teeth of the main transmission gear face opposite to the crank arm. The main transmission gear of the crank assembly won't interfere with the axis of the bicycle, and the main transmission gear is driven directly by the crank arms for better power transmission efficiency.
CRANK ASSEMBLY OF A SHAFT DRIVEN BICYCLE
2017-06-15
Patent
Elektronische Ressource
Englisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |