A bicycle power-saving crank includes: a base arm connected at one end to a chainwheel and 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, rotatably connected to the outer spindle and a pedal and rotatable synchronously with the outer sprocket. When the base arm extends horizontally in the travel direction, while the axial extension line of the outer arm forms a 12° angle relative to the horizontal extension line of the base arm. This design ensures that, throughout the pedaling process, the outer arm consistently maintains an angle of 12° relative to the base arm, regardless of its rotational angle, thereby enhancing pedaling efficiency.
BICYCLE POWER-SAVING CRANK
2025-05-22
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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