The invention discloses a three-gear speed change structure for a bicycle and a speed change method of the three-gear speed change structure. The problems that an existing bicycle speed change structure does not support small-space three-gear speed change and is high in cost are solved. According to the technical scheme, the three-gear gearbox comprises a center shaft, a three-gear speed changing structure and a gearbox shell, wherein the three-gear speed changing structure is composed of a centrifugal clutch gear shifting mechanism, a composite planetary gear ring, a first-stage transmission mechanism, a second-stage transmission mechanism and a third-stage transmission mechanism. The centrifugal clutch gear shifting mechanism is responsible for switching different transmission mechanisms to achieve three-gear speed change, and the composite planetary gear ring is used for being matched with the centrifugal clutch gear shifting mechanism to achieve partial gear switching. The effects of simplifying the structure, compressing the space, improving the transmission efficiency and reducing the cost are achieved.

    本发明公开了一种自行车用三挡变速结构及其变速方法,解决现有的自行车变速结构不支持小空间三挡变速且成本高的问题。该技术方案包括中心轴、三挡变速结构和变速箱壳体,其中三挡变速结构由离心离合换挡机构、复合行星齿环和一级、二级、三级传动机构组成。离心离合换挡机构负责切换不同传动机构实现三挡变速,复合行星齿环用于配合离心离合换挡机构实现部分挡位切换。实现了简化结构、压缩空间、提高传动效率、降低成本的效果。


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    Title :

    Three-gear speed change structure for bicycle and speed change method of three-gear speed change structure


    Additional title:

    一种自行车用三挡变速结构及其变速方法


    Contributors:
    XU SHUHU (author) / YAN XIANGYU (author) / ZHAO JUNJIAN (author)

    Publication date :

    2024-08-30


    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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