Multi-rotor type aircraft

Abstract

The invention discloses a multi-rotor type aircraft. The multi-rotor type aircraft comprises a bracket and a main motor which is mounted on the bracket, wherein the main motor comprises a first main motor and a second main motor which are coaxially arranged; the first main motor and the second main motor are respectively connected with first main screw propellers and second main screw propellers; at least three secondary screw propellers surround around each main motor and are mounted on the bracket. According to the multi-rotor type aircraft, large screw propellers are driven by main motors which are used as engines, so that the lifting efficiency is high; the main motors are coaxially arranged; the two pairs of main screw propellers rotate in reverse directions, so that the large torque is offset; the main motors are arranged in the center of an aircraft body, so that the vibration influence is minimized; the gestures and actions of the aircraft body are controlled by the secondary motors, so that the power consumption is reduced; if the aircraft accidently crashes in the takeoff and landing stages, the secondary motors and small screw propellers at the periphery are firstly damaged, so that the main motors and the main screw propellers in the center of the aircraft body are protected, and thus the maintenance cost and difficulty are greatly reduced.

Description

technical field [0001] The application belongs to the field of aerial photography aircraft, in particular to a multi-rotor aircraft. Background technique [0002] Unmanned aerial vehicles have the characteristics of small size, light weight, low cost, flexible operation and high safety, and can be widely used in aerial photography, monitoring, search and rescue, resource exploration and other fields. [0003] In the prior art, an unmanned aerial vehicle generally includes a plurality of rotors, and each rotor is driven by a motor respectively, and its disadvantages are: [0004] 1. Since there are multiple motors, the motors are evenly arranged in the horizontal direction according to the center of the fuselage, so that the overall weight of the unmanned aerial vehicle is relatively heavy; [0005] 2. Multiple motors work together, and the high-frequency vibration generated by them can easily affect the clarity of aerial photography; [0006] 3. The existing multi-axis air...

AI Technical Summary

Problems solved by technology

[0005] 2. Multiple motors work together, and the high-frequency vibration generated by them can easily affect the clarity of aerial photography;

[0006] 3. The existing multi-axis aircraft uses multiple motors to directly drive the respective propellers. In order to maintain balance during the flight of the aircraft, the flight control system needs to change the motor speed frequently

This frequent change of speed causes the motor to consume power faster

And each motor has working efficiency, the more motors there are, the lower the working efficiency of the whole machine will be

[0007] 4. It is difficult for existing types of multi-motor-driven aircraft to be large in size, because the larger the motor, the greater the vibration during operation

And the increase in the cost of a single motor leads to a sharp increase in the cost of the whole machine

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