The invention relates to an electrically-driven two-gear speed reducer and a control method thereof. The two-gear speed reducer comprises an input shaft, a first-stage speed reduction gear set, a sun gear control shaft, a clutch, a brake, an NGW type planetary gear set, a third-stage speed reduction gear set and an output shaft. Wherein the primary reduction gear set comprises an input driving gear and an input driven gear; the NGW type planetary gear set comprises a sun gear, a planet gear, a gear ring and a planet carrier; the three-stage reduction gear set comprises an output driving gear and an output driven gear. A speed reducer formed by combining a parallel shaft speed reduction gear set and an NGW type planetary gear set has two driving gears, is free of power interruption in the gear shifting process and has a neutral gear and a parking gear; and meanwhile, the axial size is more compact. The adopted NGW type planetary gear set is the optimal choice in numerous planetary gear mechanisms, and is high in efficiency, small in size, simple in structure, convenient to manufacture and wide in application.

    本发明涉及一种电驱动两挡减速器及其控制方法。两挡减速器包括输入轴、一级减速齿轮组、太阳轮控制轴、离合器、制动器、NGW型行星齿轮组、三级减速齿轮组和输出轴;其中,一级减速齿轮组包括输入主动齿轮和输入从动齿轮;NGW型行星齿轮组包括太阳轮、行星轮、齿圈和行星架;三级减速齿轮组包括输出主动齿轮和输出从动齿轮。利用平行轴减速齿轮组与NGW型行星齿轮组的组合,构成的减速器,具备两个行车挡位且换挡过程无动力中断,具备一个空挡和一个驻车挡;同时具备更紧凑的轴向尺寸。采用的NGW型行星齿轮组,是众多行星齿轮机构中的最优选择,其效率高、体积小、结构简单、制造方便,应用广泛。


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    Title :

    Electrically-driven two-gear speed reducer and control method thereof


    Additional title:

    电驱动两挡减速器及其控制方法


    Contributors:
    MEI XIANGNAN (author) / ZHAO XUESONG (author) / FU CHAO (author)

    Publication date :

    2025-02-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F16H Getriebe , GEARING / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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