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).


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    Title :

    CONNECTING DEVICE FOR CHAINRING OF BICYCLE


    Additional title:

    VERBINDUNGSVORRICHTUNG FÜR DEN KETTENRING EINES FAHRRADS
    DISPOSITIF DE RACCORDEMENT POUR PLATEAU DE BICYCLETTE


    Contributors:

    Publication date :

    2017-12-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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