A bicycle power-saving crank includes: a base arm, positioned on an outside of a chainwheel and connected at one end to the chainwheel, wherein the base arm is rotatable synchronously with the chainwheel; a base sprocket, fixed to the base arm and facing in the chainwheel; an outer sprocket, rotatably connected to the other end of the base arm via an outer spindle; a transmission component, rotatably connected to the base sprocket and the outer sprocket; and an outer arm, having one end rotatably connected to the outer spindle and rotatable synchronously with the outer sprocket and the other end rotatably connected to a pedal. Through the addition of the outer arm, an additional length results in an increased lever arm length, achieving power saving.
BICYCLE POWER-SAVING CRANK
ENERGIESPARENDE FAHRRADKURBEL
MANIVELLE DE BICYCLETTE À ÉCONOMIE D'ÉNERGIE
2025-04-16
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
CRANK DEVICE WITH POWER SAVING MECHANISM AND BICYCLE CRANK ASSEMBLY
European Patent Office | 2024
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