The invention relates to a dual rotor aircraft with foldable and dangling lower blades. The aircraft includes an aircraft body and rotor arms in fixed connection with the aircraft body; each of the rotor arm is coaxially provided with an upper rotor motor and a lower rotor motor; the motor shafts of the upper rotor motor and the lower rotor motor are respectively provided with an upper blade and a lower blade; the lower blade on the lower rotor motor is in fixed installation with the motor shaft of the lower rotor motor by a downwards-foldable and dangling blade installation structure, which includes a blade seat with an annular step shape, a blade seat cardinal axis holes and cardinal axes located on the inner step of the blade seat and distributed along the tangent direction of the the step surface; one end of the blade fixed with the blade seat is equipped with corresponding blade hinged parts; the blade hinged parts are equipped with blade hinged holes, which are mutually hinged with the blade seat cardinal axis holes through the cardinal axes. The blades on the lower rotor motors of the unmanned aerial vehicle can fold down automatically, do not produce turbulence under the effects of the downward airflow produced by the upper blades, so as to facilitate the stability of the flight status of the aircraft.
Dual rotor aircraft provided with foldable and dangling lower blades
2015-07-08
Patent
Elektronische Ressource
Englisch
IPC: | B64C AEROPLANES , Flugzeuge |
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Europäisches Patentamt | 2015
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