A crank apparatus (1) equipped with a labor-saving mechanism and a bicycle crank assembly are disclosed. The crank apparatus (1) includes a crank mechanism (10), a transmission mechanism (20), a supporting module (30) and a rotating arm module (40). The crank mechanism (10) includes 5 a crank (11), an axle-end gear (12) and a pedal-end gear (13). The transmission mechanism (20) includes a rotating axle (21), a first gear (22) and a second gear (23). Two ends of the rotating axle (21) include a circular groove (213). The supporting module (30) is mounted to the rotating axle (21) and includes an outerring (31) androllers (32). Therollers (32) are received inside the circular grooves (213) and clamped between the rotating axle (21) and the outer ring (31). The rotating arm 10 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). Accordingly, the transmission stability and useful lifetime of the crank apparatus and bicycle crank assembly are increased.
CRANK APPARATUS EQUIPPED WITH LABOR-SAVING MECHANISM AND BICYCLE CRANK ASSEMBLY
2024-10-10
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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