| CPC B64U 50/30 (2023.01) [B64U 10/14 (2023.01); B64U 10/25 (2023.01); B64U 10/50 (2023.01); B64U 20/77 (2023.01); B64U 30/14 (2023.01); B64U 30/297 (2023.01); B64U 40/10 (2023.01); B64U 50/13 (2023.01); B64U 2201/20 (2023.01)] | 5 Claims |
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1. A drone, comprising:
a fuselage in which a battery is mounted and a forward direction is set in an x-axis;
a first rotor and a second rotor each having its rotational axis aligned in a z-axis direction, and disposed to face each other about the fuselage at a first position when viewed in an x-axis direction;
a third rotor and a fourth rotor each having its rotational axis aligned in the z-axis direction and disposed to face each other in a y-axis direction at a second position of the fuselage when viewed in the x-axis direction;
a first frame shaft rotatably supported with respect to the fuselage about a y1-axis parallel to the y-axis at the first position and supporting the first rotor and the second rotor by respective support shafts parallel to the x-axis at both end portions;
a second frame shaft rotatably supported with respect to the fuselage about a y2-axis parallel to the y-axis at the second position and supporting the first rotor and the second rotor by respective support shafts parallel to the x-axis at both end portions;
a third frame shaft disposed to be spaced apart from the first frame shaft in the z-axis direction by a plurality of first rod parts and formed to tilt the first rotor and the second rotor about each axis parallel to the x-axis while being moved by a force acting in parallel to the y-axis;
a fourth frame shaft disposed to be spaced apart from the second frame shaft in the z-axis direction by a plurality of second rod parts and formed to tilt the third rotor and the fourth rotor about each axis parallel to the x-axis while being moved by a force acting in parallel to the y-axis;
a first drive motor unit connected through a first conversion mechanism unit and providing a force to the third frame shaft and the fourth frame shaft in a direction parallel to the y-axis;
a second drive motor unit connected through a second conversion mechanism unit and providing a force to rotate the first frame shaft and the second frame shaft about the y1-axis and the y2-axis, respectively;
a control unit configured to implement a plurality of flight modes by controlling the first rotor, the second rotor, the third rotor, the fourth rotor, the first drive motor unit, and the second drive motor unit; and
a wing part installed on an upper portion of the fuselage and formed in a form of an air foil to provide lift,
wherein the plurality of flight modes include:
a first flight mode in which both the first drive motor unit and the second drive motor unit are stopped and the speeds of the first to fourth rotors are individually controlled; and
a second flight mode in which the first drive motor unit and the second drive motor unit are individually controlled and operated, and the speeds of the first to fourth rotors are individually controlled,
wherein the first flight mode includes:
a 1-1th flight mode in which the fuselage is tilted in the x-axis direction or the fuselage moves in the y-axis direction;
a 1-2th flight mode in which the fuselage is tilted in the y-axis direction or the fuselage moves in the x-axis direction;
a 1-3th flight mode in which the fuselage rotates about the z-axis; and
a 1-4th flight mode in which the fuselage moves in the z-axis direction, and
wherein the second flight mode includes:
a 2-1th flight mode in which the fuselage moves in the y-axis direction by maintaining the fuselage horizontally and tilting the first to fourth rotors about each axis parallel to the x-axis;
a 2-2th flight mode in which the fuselage moves in the y-axis direction by maintaining the fuselage horizontally and tilting the first to fourth rotors about each axis parallel to the y-axis;
a 2-3th flight mode in which the fuselage rotates about the z-axis by maintaining the fuselage horizontally and individually controlling the speeds of the first to fourth rotors;
a 2-4th flight mode in which the fuselage rotates in the z-axis direction by maintaining the fuselage horizontally and individually controlling the speeds of the first to fourth rotors;
a 2-5th flight mode in which the fuselage rotates about the x-axis by rotating the first to fourth rotors about each axis parallel to the x-axis; and
a 2-6th flight mode in which the fuselage rotates about the y-axis by rotating the first to fourth rotors about each axis parallel to the y-axis,
wherein the third frame shaft is spaced apart from the first frame shaft in the z-axis direction by a plurality of first rod parts,
and is configured to be driven in a direction parallel to the y-axis so as to tilt the first and second rotors about each axis parallel to the x-axis;
wherein the fourth frame shaft is spaced apart from the second frame shaft in the z-axis direction by a plurality of second rod parts,
and is configured to be driven in a direction parallel to the y-axis so as to tilt the third and fourth rotors about each axis parallel to the x-axis;
wherein the third and fourth frame shafts are coupled to the first and second drive motor units, respectively,
through distinct link mechanisms such that concurrent actuation enables differential tilting about both the x-axis and y-axis independently of fuselage attitude;
wherein the control unit executes a synchronized actuation sequence wherein the tilting of the rotors about the x-axis is dynamically compensated by y-axis tilt
to maintain level attitude during directional maneuvers in the second flight mode.
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