Multifunctional three-rotor unmanned aerial vehicle with extensible rotors

The multifunctional three-rotor unmanned aerial vehicle comprises three rotors, the three rotors are installed on three extensible and retractable rotor supports respectively, the included angle between every two rotor supports is 120 degrees, and one end of each rotor support is connected to a lifting mechanism through a transmission mechanism. Wherein the transmission mechanism is driven by a motor so as to respectively drive the rotor wing bracket to move and the lifting frame to ascend and descend. Compared with the prior art, the rotor wing bracket can be expanded and retracted, so that the stress area of the unmanned aerial vehicle during flight is increased, and the flight stability is improved; meanwhile, the occupied space of the unmanned aerial vehicle is effectively reduced in a non-working state, storage and arrangement are convenient, in addition, functional equipment installed on the lifting mechanism ascends and descends along with extension and retraction of the rotor wing support, the functio