Unmanned aerial vehicle emergency landing device

Abstract

The invention relates to an unmanned aerial vehicle emergency landing device and belongs to the field of unmanned aerial vehicle protecting devices. For solving the problem in the prior art that a plant protection unmanned aerial vehicle falls down slowly when in fire to result in fire in a large area, the unmanned aerial vehicle emergency landing device comprises a rotating shaft driven by a motor to rotate, and blades circumferentially uniformly arranged around the rotating shaft, wherein the rotating shaft is axially provided with a through hole, the bottom of the through hole is fixedly provided with a fan, the inner wall of the through hole is provided with a mounting hole, a blade extending into the through hole is hinged to the mounting hole and can swing up and down, the upper portion of the through hole is provided with a piston capable of sliding along the inner wall of the through hole, the through hole is provided with a rubber wedge, and the distance from the bottom of thewedge to the top wall of the mounting hole is smaller than the thickness of the piston; the top of the rotating shaft is provided with a cover capable of covering the through hole, and the rotating shaft is provided with a thermosensitive switch which is used for controlling opening and closing of the cover and on and off of the motor; an air pipe is communicated between the bottom of the throughhole and the top of the water tank of an unmanned aerial vehicle, and the water outlet of a water pipe inside the water tank faces right towards the outer surface of an unmanned aerial vehicle enclosure.

Description

technical field [0001] The invention belongs to the field of protective devices for unmanned aerial vehicles, and in particular relates to an emergency landing device for unmanned aerial vehicles. Background technique [0002] Agricultural plant protection drones are agricultural drone systems used to spray pesticides in farmland. When agricultural plant protection drones spray pesticides, they usually fly at ultra-low altitude over the farmland (the flight height is generally 2 meters). There are utility poles, trees, houses, etc. in the farmland. The plant protection drone may collide with these obstacles during operation. Once it hits an obstacle, the drone may directly catch fire during the collision. [0003] However, the existing emergency landing devices for plant protection drones do not take into account the situation that the drone is on fire, and the descent is slow. The slow descent of the UAV will cause the UAV on fire to drop sparks while floating, and these ...

AI Technical Summary

Problems solved by technology

[0004] The UAV emergency landing device of the present invention solves the problem of slow descent when the plant protection UAV catches fire in the prior art

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