A connecting device (100, 200, 300, 400) for a chainring of a bicycle is disclosed, including a connecting disc (20, 66, 74, 80), a shaft (10, 62, 72, 90), and a crank (40). The connecting disc (20, 66, 74, 80) is adapted to be engaged with a chainring, and has an axial bore (221a), a bulging portion (22) bulging from a central portion of the connecting disc (20, 66, 74, 80), and a surrounding portion (24), which is flat, and surrounds an outer periphery of the bulging portion (22). The shaft (10, 62, 72, 90) passes through the axial bore (221a) to be fixedly engaged with the connecting disc (20, 66, 74, 80). The shaft (10, 62, 72, 90) has a connecting end (102). The crank (40) has a connecting end (401) engaged with the connecting end (102) of the shaft (10, 62, 72, 90), and a bearing end (402) adapted to bear an external force to make the crank (40) rotate around the shaft (10, 62, 72, 90).
CONNECTING DEVICE FOR CHAINRING OF BICYCLE
VERBINDUNGSVORRICHTUNG FÜR DEN KETTENRING EINES FAHRRADS
DISPOSITIF DE RACCORDEMENT POUR PLATEAU DE BICYCLETTE
2017-12-06
Patent
Elektronische Ressource
Englisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
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