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

Abstract

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.

Description

technical field [0001] The invention relates to a vertical take-off and landing composite layout (fixed wing + multi-rotor) unmanned aerial vehicle, in particular to a rotor retractable device of the unmanned aerial vehicle. Background technique [0002] Conventional fixed-wing UAVs need a run-up to take off, airdrop or orbital ejection to take off, and must taxi or land by parachute or hit the net when landing. For taxi take-off and landing, a larger space is required for flight, while for airdrop, Orbital catapult takeoff, parachute landing, and net landing have their own inconveniences, but conventional fixed-wing UAVs have the advantages of long battery life, high flight efficiency, and large payload. The multi-rotor UAV has the characteristics of simple mechanical structure and vertical take-off and landing, but the endurance time is short and the load is small. [0003] Therefore, many researchers have developed a variety of fixed-wing UAVs that can take off and land ...

AI Technical Summary

Problems solved by technology

[0004] However, this vertical take-off and landing compound layout UAV does not take into account that when the UAV is flying in the air in the form of a fixed wing, the rotor arm and rotor protruding from the outside of the aircraft will greatly affect the aerodynamic characteristics of the UAV. Not good for drones flying in the air

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