An undercarriage spring is arranged between each undercarriage and an arm, and an arm spring is arranged between an arm joint and the arm. And the unmanned aerial vehicle has enough tension in a working state through the springs, so that the unmanned aerial vehicle is stable in structure and is not damaged due to excessive tension. The optimized spring mounting position enables the deflection of the arm spring and the undercarriage spring in a folded state to be small, and the arm and the undercarriage cannot deviate from the folding position due to small tension; in the unfolding process, the distance increment of the spring mounting columns is smaller than the maximum deflection of the springs, and damage caused by excessive stretching is avoided; when the unmanned aerial vehicle is in a flying state, the torque of tension generated by the springs to the arm rotating shafts is larger than the maximum reaction torque generated by the motors and the rotors during flying due to the distance between the spring mounting columns, and the arms are kept at the unfolding position during working. According to the invention, weight increment caused by a complex structure is avoided; the arms and the undercarriages can be pulled by the tension of the springs in the unfolded and folded states so as to be fixed in position and cannot shake along with flight, and the flight stability is guaranteed.
一种微小型折叠无人机,在各起落架与机臂之间有起落架弹簧,在机臂接头与机臂之间有机臂弹簧。通过弹簧使无人机在工作状态有足够拉力,保证了无人机结构稳定,不因受到过度拉伸而损坏。优化的弹簧安装位置,使折叠状态的机臂弹簧与起落架弹簧挠度小,因拉力小使机臂与起落架不会偏离折叠位置;展开过程中,弹簧安装柱间距增量小于弹簧最大挠度,不会因过度拉伸损坏;无人机处于飞行状态时,弹簧安装柱的间距使弹簧产生的拉力对机臂转轴的扭矩大于飞行时电机和旋翼产生的最大反扭矩,机臂在工作中保持展开位置。本发明避免了复杂结构带来的增重;机臂及起落架在展开和折叠状态均能受弹簧拉力牵引从而固定位置,不会随飞行摇晃,保证了飞行稳定性。
Micro-miniature folding unmanned aerial vehicle
一种微小型折叠无人机
2023-11-17
Patent
Elektronische Ressource
Chinesisch
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