Double-rotor unmanned aerial vehicle

Abstract

The invention discloses a double-rotor unmanned aerial vehicle which comprises a vehicle body, a power system and a rotor system; the power system comprises two power output mechanisms fixed on the vehicle body, a synchronizing shaft in transmission connection with the power output mechanisms and a helicopter speed reducer; the helicopter speed reducer comprises a main box body, a rotor wing shaftcapable of rotating relatively and penetrating through the main box body up and down, a bevel gear fixedly arranged on the rotor wing shaft in a sleeving mode and a bevel gear shaft matched with thebevel gear; the power end of the bevel gear shaft is correspondingly and fixedly connected with the synchronizing shaft; according to the invention, the parallel operation of the two engines is realized by one parallel operation speed reducing mechanism, the total output power of the system is improved, and the two engines can work simultaneously or independently. A steering engine driving assembly, a tilting tray assembly and a total-moment sliding rod assembly are in modular design, so the structural complexity is reduced, and operation such as design, debugging and maintenance of the rotorsystem is simplified.

Description

technical field [0001] The invention belongs to the technical field of unmanned aerial vehicles, and in particular relates to a dual-rotor unmanned aerial vehicle. Background technique [0002] At present, the multi-rotor drones on the market are mainly driven by fixed-pitch electric drive. Since the energy density of the battery is much lower than that of fuel, limited by the battery, the multi-rotor drone driven by the fixed-pitch motor is mainly used for aerial photography. It is short and can carry light weight, which cannot meet the needs of other types of civilian drones, such as: high-altitude rescue of people and fires, pesticide spraying, and transport of heavy objects in small spaces. [0003] With the development and progress of technology, variable-pitch oil-powered quad-rotor UAVs have appeared, which have broken through the limitations of load and endurance time. , this type of transmission has low efficiency, poor flight stability, and is set up with a single...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent CN107010229A discloses a twin-engine oil-powered unmanned aerial vehicle, including a frame, a plurality of rotors evenly distributed along the circumference, two engines for driving a plurality of said flanges to rotate simultaneously, and two The power output by the engine is coupled and distributed to the transmission system of multiple rotors, which partially solves the problems of multi-rotor UAVs such as load and endurance, low efficiency and poor flight stability.

[0006] However, when the two engines are paralleled, they simply rely on the parallel gears for coupling. Due to the asynchronous start of the two engines and the inconsistent speed, it will cause a serious impact on the transmission system and cause a decrease in actual output power.

Moreover, the rotor shaft also has shortcomings such as concentrated force and easy deformation, and there are problems such as the complex structure of the swash plate, which is not easy to disassemble and maintain.

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