The invention relates to a bicycle speed change device. The bicycle speed change device comprises a shaft center, a plurality of planetary gear modules, a plurality of one-way clutches and a gear shifting mechanism. The planetary gear modules are connected in series and arranged on the axis. The shift mechanism includes a shift actuator and a plurality of control pawls. The control pawls are movably arranged at different positions of the axis respectively. The concave part of the gear shifting actuator is used for controlling the control end of one of the control pawls to be opened and closed, and then the sun gears corresponding to the planetary gear modules are controlled to be fixed to the axis. When switching from the high-speed gear to the low-speed gear, the rotation direction of the shift actuator is the same as the rotation direction in which the pawl is controlled to close.

    本发明是有关于一种自行车变速装置,包括轴心、多个行星齿轮模块、多个单向离合器以及换挡机构。这些行星齿轮模块彼此串接并设于轴心。换挡机构包括变挡致动器以及多个控制棘爪。这些控制棘爪分别可活动地设于轴心的不同位置。变挡致动器的凹部用以控制这些控制棘爪其中的一个控制棘爪的控制端的开启与关闭,进而控制这些行星齿轮模块对应的太阳齿轮固定于轴心。当由高速挡切换至低速挡时,变挡致动器的旋转方向与控制棘爪关闭的旋转方向相同。


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    Title :

    Bicycle speed change device


    Additional title:

    自行车变速装置


    Contributors:
    CAI MINGZHI (author)

    Publication date :

    2023-10-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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