The invention discloses an electric power-assisted steering system for a commercial vehicle, which comprises a steering control power transmission mechanism and a steering power-assisted power transmission mechanism, and is characterized in that the system realizes independent and cooperative transmission of power of steering control and power of steering power-assisted by designing an optimized steering output shaft; the middle of the steering output shaft protrudes outwards in the radial direction, the upper portion of the steering output shaft is provided with a gear sector to receive power of the steering control power transmission mechanism, the lower portion of the steering output shaft is provided with a circular hole, and a planetary gear mandrel is arranged in the circular hole and serves as a planet carrier to receive power of the steering power-assisted power transmission mechanism, so that superposition coupling of the power is achieved. By adopting a circulating ball and planetary gear type electric power-assisted steering gear structure, the main power output by a power-assisted steering motor does not pass through a circulating ball screw nut mechanism with weak bearing capacity and directly acts on an output shaft. Performance limitation of an existing old-fashioned electric recirculating ball steering gear is avoided, and large-torque steering is achieved.

    本发明公开了一种商用车电动助力转向系统,包括转向操控动力传递机构和转向助力动力传递机构,其特征在于:该系统通过设计优化的转向输出轴实现转向操控和转向助力的动力相互独立且协同地传递,所述转向输出轴中间部位径向外凸,上部设有齿扇以接收转向操控动力传递机构的动力,下部设有圆孔内置行星齿轮芯轴兼作行星架使用,以接收转向助力动力传递机构的动力,从而实现动力的叠加耦合。通过采用循环球+行星齿轮式的电动助力转向器结构,使其转向助力电机输出的主动力不经过承载能力较弱的循环球螺杆螺母机构,直接作用在输出轴上。规避了现有老式电动循环球转向器的性能局限,实现了大扭矩转向。


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    Title :

    Electric power steering system of commercial vehicle


    Additional title:

    一种商用车电动助力转向系统


    Contributors:
    YANG LIANGZHONG (author) / YANG LIHANG (author) / JIANG MENGJIE (author) / YIN LIJUN (author)

    Publication date :

    2024-10-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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