The invention provides the box-type speed change mechanism which can be mounted at the middle axle of the bicycle, the device can realize speed change when the bicycle is ridden, and the middle box-type speed change mechanism can be used on the bicycle to replace the traditional rear inner speed change or chain type outer speed change. The multi-stage speed change mechanism is formed by meshing a plurality of groups of ratchet gears and an output shaft gear, and multi-stage speed change is realized by utilizing a coupling structure of the ratchet gears at different axial positions and relative pawls at different positions. A plurality of pawls are evenly distributed on a variable-speed shaft, ratchet gears with different tooth numbers are sleeved outside the pawls, ratchet structures are arranged in inner holes of the gears, and the pawls arranged at different axial positions on the variable-speed shaft are released or jacked up to be coupled with ratchets on the ratchet gears by pulling axial movement of gear pieces in the inner holes of the variable-speed shaft through a pull rod. The gear and the pawl nest shaft rotate synchronously, and the coupled ratchet gear is meshed with an output gear on the output shaft to achieve the purpose of outputting torque.

    本发明提供了一种可安装在自行车中轴处的处的箱式变速机构,该装置可以使自行车在骑行时实现变速,可在自行车上使用中置箱式变速机构取代传统的后内变速或链条式外变速。本发明由多组棘齿齿轮和输出轴齿轮啮合组成,利用不同轴向位置的棘齿齿轮与相对棘爪在不同位置的耦合结构实现多级变速。在变速轴上均布若干个棘爪,其外部套有不同齿数的棘齿齿轮,齿轮内孔有棘齿结构,通过拉杆拉动变速轴内孔的档位片的轴向移动释放或顶起排列安装在变速轴上不同轴向位置的棘爪与棘齿齿轮上的棘齿耦合,使该齿轮与棘爪窝轴同步转动,耦合的棘齿齿轮又与输出轴上的输出齿轮啮合达到输出转矩的目的。


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    Titel :

    Centrally-mounted box-type power-assisted variable-speed motor for bicycle


    Weitere Titelangaben:

    一种自行车中置箱式助力变速电机


    Beteiligte:
    XU KAIBO (Autor:in)

    Erscheinungsdatum :

    2024-01-05


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

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



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