The invention discloses a middle motor for an electric power-assisted bicycle, which comprises a shell, and a motor, an inner gear ring, a transmission fluted disc and a pedal output shaft are arranged in the shell; a rotor of the motor is connected with a motor output shaft, the motor output shaft is connected with an eccentric sleeve, and the eccentric sleeve is sleeved with a planetary gear capable of being meshed with the inner gear ring; the transmission fluted disc is rotatably installed in the shell through a first bearing, a plurality of torsion pins are connected between the planetary teeth and the transmission fluted disc, and a driving gear is connected to the transmission fluted disc. According to the invention, the planetary gear and the inner gear ring are matched in an eccentric rotation manner, the torque with a specific reduction ratio can be transmitted to the transmission fluted disc through the torsion pin so as to carry out corresponding speed reduction rotation, and compared with single-stage gear transmission, the planetary gear transmission mechanism has the advantages of small abrasion, low noise and stable operation.

    本发明公开了一种电助力自行车用中置电机,包括外壳,外壳内安装有电机、内齿圈、传动齿盘及踏板输出轴;电机的转子连接有电机输出轴,电机输出轴上连接有偏心套,偏心套上套接有能与内齿圈啮合的行星齿;传动齿盘通过第一轴承可转动地安装在外壳内,行星齿与传动齿盘之间连接有若干个扭力销,传动齿盘上连接有主动齿轮。本发明中,行星齿轮与内齿圈之间偏心回转的配合,可通过扭力销将特定的减速比力矩传递给传动齿盘以进行相应的减速转动,较齿轮单级传动而言,具有磨损小、噪音小、运行稳定的优点。


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    Title :

    Middle motor for electric power-assisted bicycle


    Additional title:

    一种电助力自行车用中置电机


    Contributors:
    LONG JIAN (author) / SUN SHIMING (author)

    Publication date :

    2023-07-04


    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 / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES



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