Rotor folding and unfolding device for vertical take-off and landing compounding layout unmanned aerial vehicle

The invention discloses a rotor folding and unfolding device for a vertical take-off and landing compounding layout unmanned aerial vehicle. Besides all components of a conventional fixed wing unmanned aerial vehicle, the rotor folding and unfolding device further comprises rotors, rotor arms, connecting rods, a linear motor, a guide rod, flow baffles and springs. One end of each rotor arm is installed on a rotary shaft in a rotor cabin on the side face of a vehicle body, and the other end of each rotor arm is provided with a direct-current brushless motor and the corresponding rotor. When the rotors do not need to be used by the compounding unmanned aerial vehicle, the linear motor installed at the middle portion of the vehicle body is controlled to pull the guide rod and the connecting rods to move, the rotor arms are rotated and retract back into the corresponding rotor cabins, and the flow baffles are closed; and when the rotors need to be used by the compounding unmanned aerial vehicle, the linear motor is controlled, so that the rotor arms are rotated and extend to the outer side of the vehicle body. The unmanned aerial vehicle with the rotor folding and unfolding device has the functions of conventional fixed wings and further has the functions of vertical take-off and landing, longitudinal and transverse maneuvering and the like. In a fixed wing mode, the rotors retract into the rotor cabins, the flow baffles are closed, and the aerodynamic characteristic influence caused by a rotor structure is avoided.