Limiting device for front flying propellers of full-electric vertical take-off and landing fixed-wing unmanned aerial vehicle

Abstract

The invention belongs to the technical field of air vehicles, and particularly relates to a limiting device for front flying propellers of a full-electric vertical take-off and landing fixed-wing unmanned aerial vehicle. The limiting device comprises a steering engine, a rocker arm, a cam and a remote control. The rocker arm is installed on the steering engine, the rocker arm is driven by the steering engine to rotate, and the cam is fixedly installed on the tail portion of a motor rotating shaft of the unmanned aerial vehicle. The rocker arm is in contact with the cam during rotating, so thatthe cam drives the propellers to rotate to the horizontal position through the motor rotating shaft of the unmanned aerial vehicle. The remote control is connected with the steering engine through wireless network. The limiting device realizes limiting the front flying propellers of the full-electric vertical take-off and landing fixed-wing unmanned aerial vehicle to be near the horizontal position at the landing stage, and avoids the use of folding propellers, landing gear and other components to reduce the aerodynamic performance of the aircraft; and the limiting device realizes the self-locking of the rocker arm through the design of the top face of the rocker arm, so that the rotation of the propellers cannot cause the rocker arm to rotate when the rocker arm is in place.

Description

technical field [0001] The invention belongs to the technical field of aircraft, and in particular relates to a limiting device for a forward-flying propeller of an all-electric vertical take-off and landing fixed-wing unmanned aerial vehicle. Background technique [0002] At present, all electric vertical take-off and landing fixed-wing UAVs use motors as the forward flight power. Since the forward flight propellers of this type of aircraft do not work during the vertical landing stage, the propellers are in a free state relative to the fuselage. Since the radius of the propeller is usually greater than the height of the fuselage, if the propeller is just near the vertical direction during the landing stage, when the UAV does not install the landing gear, the propeller will inevitably collide with the ground during landing, thus damaging the propeller. Electric vertical take-off and landing fixed-wing UAVs are equipped with landing gear. However, increasing the landing gea...

AI Technical Summary

Problems solved by technology

First of all, the power effect of the folding propeller is smaller than that of the ordinary propeller, that is, it consumes more energy under the same pulling force, which will reduce the flight time and range of the drone; secondly, when the propeller is installed at a higher position on the fuselage, the whole machine The tension line of the tail will move upwards, resulting in a large nose-down moment when the aircraft is flying. It is necessary to generate a downward force through the tail to balance the nose-down moment, which also has a bad impact on the aerodynamic performance of the whole aircraft.