A bicycle crankset, which is adapted to connect to a chain (30), includes a chainring (10), a spider (20), and a crankarm (50). The chainring (10) has teeth (14) on an edge (12) thereof to engage the chain (30) and a chainring axis (60) through a center thereof. The spider (20) has spider arms (22) to detachably connect to the chainring (10) and a connecting bore (40). The spider has a bore axis (62) through a center of the connecting bore (40), and the bore axis (62) is kept a predetermined distance away from the chainring axis (60) to form a deviation. The crankarm (50) has a connecting member (54) to engage the connecting bore (40) of the spider (20). Tips of the teeth (14) of the chainring move (10) in a noncircular path when the crankarm (50) is exerted to drive the chainring (10) to turn, and the noncircular path is adjustable by shifting a location of the connecting bore (40) which changes the deviation.
BICYCLE CRANKSET
FAHRRADKURBELSATZ
PÉDALIER DE BICYCLETTE
2020-01-08
Patent
Elektronische Ressource
Englisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |