The invention discloses a high-precision gear pitch changing system which comprises a gear box used for being connected with a power system, a nut penetrates through the outer wall of the gear box, and the axis of the nut coincides with the axis of an output shaft. The output shaft is a hollow shaft, a lead screw penetrates through the axis of the output shaft and the axis of the nut, and the lead screw is in threaded fit with the nut. The top end of the screw rod penetrates out of the output shaft and is rotatably connected with a variable pitch propeller rocker arm frame for driving the propeller clamp to rotate; and a driving device for driving the screw rod to rotate is arranged on the outer side of the gear box. The hollow output shaft provides a mounting space for the pitch control system, the driving device drives the lead screw to rotate, rotation of the lead screw is converted into vertical movement through threaded connection of the nut and the lead screw, the lead screw penetrates through the output shaft to drive the pitch control paddle rocker arm frame to move vertically, and therefore the pitch control paddle clamp is driven to change the angle, simple in structure, reliable in pitch control and high in precision.

    本发明公开了一种高精度齿轮变距系统,本发明一种高精度齿轮变距系统,包括用于连接动力系统的齿轮箱,所述齿轮箱外壁上贯穿有螺母,所述螺母的轴线与输出轴的轴线相重合;输出轴为空心轴,所述输出轴与螺母的轴线处贯穿有丝杆,所述丝杆与螺母螺纹配合;所述丝杆顶端穿出输出轴并可转动地连接有带动桨夹转动的变距桨摇臂架;所述齿轮箱外侧设置有用于驱动丝杆转动的驱动装置。本发明通过空心的输出轴为变距系统提供了安装空间,驱动装置驱动丝杆转动,利用螺母与丝杆的螺纹连接将丝杆的转动转变为上下运动,丝杆穿过输出轴带动变距桨摇臂架上下运动,从而驱动桨夹变换角度,结构简单,变距可靠,精度高。


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    Title :

    High-precision gear pitch changing system


    Additional title:

    一种高精度齿轮变距系统


    Contributors:
    WANG BIN (author) / WEN XIAOQING (author) / MOU JIANGANG (author) / GUO XIAOJUN (author)

    Publication date :

    2021-04-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F16H Getriebe , GEARING / B64C AEROPLANES , Flugzeuge



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