An electric assist drive system for a bicycle, comprising a pedal crankshaft (1), an epicyclic gear mechanism (20), an assist motor (M2) for driving an output shaft (21), and a control motor (M1) for controlling the transmission ratio between the pedal crankshaft (1) and the output shaft (21) through the epicyclic gear mechanism (20). The epicyclic gear mechanism (20) further comprises a first sun gear (5a) and a second sun gear (5b) which are fixed for rotation with the output shaft (21). A planet carrier (2) is fixed for rotation with the pedal crankshaft (1) and supports a first set of planet gears (3a) between a first sun gear (5a) and a first ring gear (4) and a second set of planet gears (3b) between a second sun gear (5b) and a second ring gear (16). A locking device (17) is operable to block rotation of the second ring gear (16), allowing the rider to push the bicycle above a preset speed limit only with his/her mechanical physical power, without power assistance, while still stepping at a comfortable pedal rotational speed.

    一种电动辅助驱动系统,用于一自行车,电动辅助驱动系统包括一踏板曲轴(1)、一周转齿轮机构(20)、一协助马达(M2)、以及一控制马达(M1),协助马达(M2)用于驱动一输出轴(21),控制马达(M1)用于透过周转齿轮机构(20)控制踏板曲轴(1)与输出轴(21)之间的传动比。周转齿轮机构(20)还包括一第一太阳齿轮(5a)以及一第二太阳齿轮(5b),两者被固定以与输出轴(21)一起旋转。一行星架(2)被固定以与踏板曲轴(1)一起旋转并且在第一太阳齿轮(5a)与一第一齿环(4)之间支撑第一组行星齿轮(3a)、以及在第二太阳齿轮(5b)与一第二齿环(16)之间支撑第二组行星齿轮(3b)。一锁定装置(17)可操作以阻挡第二齿环(16)的旋转,从而允许骑者仅依靠他/她的机械物理动力将自行车推到一预设速度限制以上,无需电力协助,同时仍以一舒适的踏板旋转速度踩踏。


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    Title :

    Power split hybrid driveline for electric bicycle to allow shutdown of assist power


    Additional title:

    用于电动自行车以允许关闭协助动力的动力分流混合传动系统


    Contributors:

    Publication date :

    2025-05-30


    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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