An unmanned aerial vehicle having ducted, coaxial...

B - Operations – Transporting – 64 – C

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Details

B64C 27/20 (2006.01) B64C 27/33 (2006.01) B64C 27/605 (2006.01) B64C 39/02 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2138656

An unmanned aerial vehicle (UAV) (10) has a composite toroidal fuselage structure (20) that surrounds a rotor assembly (100) that includes pair of coaxial, multi-bladed, counter-rotating rotors (200, 202). The toroidal fuselage structure (20) includes an annular C-shaped structure (430) that defines an internal cavity (436) and removable panel structures (464) mounted in combination with the annular C-shaped structure (430). The UAV has a drive train assembly (60) that includes a sprag clutch (62), an engine coupling subassembly (63), a transmission coupling subassembly (74), and a drive shaft (72) operative to couple torque between the UAV engine (54) and the rotor assembly (100) and configured to maximize allowable axial, angular, and/or parallel misalignments therebetween. The UAV further includes a coaxial transmission/center hub assembly (110), an integrated spline/ cone seat subassembly (190), rotor blade subassemblies including pretwisted inner flexbeams (260), and snubber assemblies (230).

Un véhicule aérien sans équipage (UAV) (10) a une structure composite à fuselage toroïdal (20) qui entoure un ensemble de rotors (100) comprenant une paire de rotors coaxiaux, multipales et à rotation antagoniste (200, 202). La structure à fuselage toroïdal (20) comprend une structure annulaire en forme de C (430) qui forme une cavité interne (436), et des structures à panneaux amovibles (464) montées en combinaison avec la structure annulaire en forme de C (430). Le véhicule UAV possède un ensemble train propulseur (60) qui comprend un couplage à roue libre (62), un sous-ensemble accouplement moteur (63), un sous-ensemble accouplement de transmission (74), et un arbre d'entraînement (72) agissant pour coupler la force de torsion entre le moteur de l'UAV (54) et l'ensemble de rotors (100) et configuré pour maximiser les défauts tolérés d'alignement axiaux, angulaires et/ou parallèles entre eux. L'UAV comprend de plus un ensemble transmission coaxiale/moyeu central (110), un sous-ensemble siège conique/cannelures intégrées (190), des sous-ensembles de lames de rotors comprenant des plaques de flexion internes préalablement torsadées (260) et des ensembles de solenoïdes de blocage (230).

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