An articulated crank apparatus 1 includes a crank 10, a transmission mechanism 20, a supporting module 30 and a rotating arm module 40. The crank 10 includes an axle-end gear 12 and a pedal-end gear 13. The transmission mechanism 20 includes an axle 21 with first and second gears 22, 23. Two ends of the rotating axle (21) include a circular groove (213, figure 4) functioning as a raceway for supporting module 30 having an outer ring (31, figure 5) and rolling elements (32, figure 5). The rotating arm module 40 includes a first rotating arm 41 and a second rotating arm 42. One end of the second rotating arm 42 is connected to the first rotating arm 41, and another end of the second rotating arm 42 is connected to the pedal-end gear 13.
Crank apparatus equipped with labor-saving mechanism and bicycle crank assembly
2025-04-30
Patent
Electronic Resource
English
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
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