The invention relates to a tail rotor pitch structure of an unmanned helicopter, which is composed of a bearing pedestal, a steering engine, a variable-pitch slide block, an universal drive shaft head A, a variable-pitch pull bar, an universal drive shaft head B, a pitman arm, a belt wheel, a threaded hole, a transmission shaft, a fixing threaded hole, a steering engine auricle and a tail rotor rocking arm. The bearing pedestal and a tail boom are connected through a screw, the transmission shaft and the belt wheel are fixedly connected, the power input of the transmission shaft can be realized by belt driving formed by the belt and the belt wheel; the steering engine auricle and the bearing pedestal are connected by a screw, the steering engine and the pitman arm are connected through a pitman arm screw, the pitman arm and the end part of the variable-pitch pull bar through the universal drive shaft head B; the variable-pitch slide block and a tail rotor transmission shaft are connected through the bearing, one end of the variable-pitch pull bar and the variable-pitch slide block are connected by the universal drive shaft head A, so that connection of the steering engine and the variable-pitch slide block is realized; and the variable-pitch slide block and the tail rotor rocking arm employs circumferential rotatable connection. According to the invention, a structure design of the tail rotor with high accident rate can be optimized, structural quality is mitigated, connection reliability is enhanced, and the tail rotor pitch structure is an optimization scheme of tail rotor transmission.


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    Title :

    Tail rotor pitch structure of unmanned helicopter


    Contributors:
    WANG CHUAN (author) / ZHAO PENGXIN (author)

    Publication date :

    2015-08-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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