The invention relates to a hydraulic actuating mechanism comprising a cylinder barrel, a piston and a piston rod, and the piston is installed in the cylinder barrel and divides the interior of the cylinder barrel into a first oil cavity and a second oil cavity; the piston rod is connected with a first execution element, and a first execution rod end is arranged on the first execution element; a second execution element and a guide fixing cylinder are further included, a second execution annular groove is formed in the inner wall of the second execution element, a guide longitudinal groove is formed in the side wall of the guide fixing cylinder, and the first execution rod end penetrates through the guide longitudinal groove to be installed in the second execution annular groove; more than two straight-through type one-way valves are arranged on the piston, and the straight-through type one-way valves are arranged in the mode that when the piston moves towards the first oil cavity, the straight-through type one-way valves are opened through the oil pressure in the first oil cavity and communicate with the first oil cavity and the second oil cavity. Complexity of a hydraulic system is reduced, self weight is light, occupied space is small, the hydraulic actuating mechanism can also serve as a functional part of the undercarriage, and therefore the hydraulic actuating mechanism can be suitable for small and medium-sized unmanned aerial vehicles such as unmanned aerial vehicles used for agriculture and forestry operation or consumer unmanned aerial vehicles.

    一种液压执行机构,包括缸筒、活塞以及活塞杆,活塞安装在缸筒内并将缸筒内部分隔为第一油腔和第二油腔;活塞杆连接设置第一执行元件,第一执行元件上设有第一执行杆端;还包括第二执行元件和导向固定筒,第二执行元件的内壁设有第二执行环槽,导向固定筒的侧壁上设有导向纵槽,第一执行杆端穿过导向纵槽安装于第二执行环槽内;活塞上设有两个以上的直通式单向阀,直通式单向阀设置为,在活塞向第一油腔方向运动时,直通式单向阀由第一油腔内的油压开启并连通第一油腔和第二油腔。减少了液压系统的复杂性,自重较轻,占用空间小并能兼作起落架自身的功能部件,从而可以适用于中小型无人机例如用于农林作业的无人机或消费类无人机。


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    Title :

    Hydraulic actuating mechanism and unmanned aerial vehicle undercarriage


    Additional title:

    一种液压执行机构及无人机起落架


    Contributors:
    CHENG JIN (author) / DAI SHUGUANG (author) / TAO BINENG (author) / YANG ZHENYU (author)

    Publication date :

    2021-04-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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