Foldable multi-rotor unmanned aerial vehicle

Abstract

The invention discloses a foldable multi-rotor unmanned aerial vehicle (UAV), and relates to the technical field of aviation system; the multi-rotor UAV can be folded and is easily accepted. The foldable multi-rotor UAV comprises arms, a frame main board, brushless motors, screw propellers and screw propeller extension grooves. The frame main board has a shape of regular polygon, each side of theregular polygon is connected with one arm, and the arms are fan-shaped. The connection angles between the arms and the frame main board are variable. When all the arms are folded, shells of the arms are spliced together to form a flat and hollow cambered-surface shell. A locking device is arranged on the frame main board, and the arms are locked by the locking device when in folded and unfolded states. The brushless motors are fixed on the arms, and the output shafts of the brushless motors are connected with rotary shafts of the screw propellers. By adjusting the brushless motors, the flightstate of the UAV can be controlled. The screw propeller extension grooves are arranged on the arms. When the screw propellers rotate, the screw propellers extend out of the screw propeller extension grooves. The foldable multi-rotor UAV can be folded, has small size after folding and has compact structure.

Description

technical field [0001] The invention relates to the technical field of aviation systems, in particular to a foldable multi-rotor drone. Background technique [0002] Compared with other drones, multi-rotor drones have unique advantages. Compared with fixed-wing aircraft, it has the advantages of vertical take-off and landing, and can hover at a fixed point; compared with single-rotor helicopters, it uses brushless motors. Power, and no tail rotor device, so it has the advantages of simple mechanical structure, high safety, and low cost of use. The many advantages of multi-rotor drones make it widely used in many fields. [0003] However, there are still some problems in traditional multi-rotor drones. For example, multi-rotor drones often have a single structure and lack artistry; at the same time, multi-rotor drones are often bulky and cannot be folded. trouble; [0004] Therefore the multi-rotor unmanned aerial vehicle of prior art has the problem that volume is big, ca...

AI Technical Summary

Problems solved by technology

[0003] However, there are still some problems in traditional multi-rotor drones. For example, multi-rotor drones often have a single structure and lack artistry; at the same time, multi-rotor drones are often bulky and cannot be folded. trouble;

[0004] Therefore the multi-rotor unmanned aerial vehicle of prior art has the problem that volume is big, cannot be folded

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