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US 9,067,677 B2Granted
Dismountable helicopter
AssigneeSaab AB
InventorsPer-Erik Cardell, Kjell Stenbom, Robert Lidström
Life of this patent
Estimating the term…
Abstract
An unmanned aerial vehicle helicopter including a dismountable tail section including a torque compensating rotor. Power transmission from the motor to the torque compensating rotor is accomplished by pulley-and-belt drive arrangements.
Claims12
A dismountable helicopter, comprising:
- a front section and a tail section, said tail section being dismountably connected to said front section;
- a motor,
- a torque compensating rotor, and
- a light-weight power transmitter configured to transmit power from said motor to said torque compensating rotor, wherein said power transmitter comprises a first pulley and belt drive arrangement configured to transmit power in said front section and a second pulley and belt drive arrangement configured to transmit power in said tail section, wherein said first pulley and belt drive arrangement and said second pulley and belt drive arrangement each comprise a first pulley, a second pulley and a belt configured to transfer power between said first pulley and said second pulley, respectively, and a mechanical coupling configured to transmit power from said first pulley and belt drive arrangement to said second pulley and belt drive arrangement, wherein said mechanical coupling comprises a gearwheel connection between said second pulley of said first pulley and belt drive arrangement and said first pulley of said second pulley and belt drive arrangement, such that the first pulley and belt drive arrangement transmits power from the motor to the mechanical coupling and the second pulley and belt drive arrangement transmits power from the mechanical coupling to the torque compensating rotor, and wherein the mechanical coupling permits the tail section to be mounted on the front section without pulling the belt over the first pulley or second pulley of the belt drive arrangements.
1 more element
A method of driving a torque compensating rotor of a UAV helicopter comprising a front section and a tail section dismountably connected to the front section, the method comprising:
- driving said torque compensating rotor with a light-weight power transmitter, said power transmitter comprising a first pulley and belt drive arrangement configured to transmit power in said front section and a second pulley and belt drive arrangement configured to transmit power in said tail section;
- said first pulley and belt drive arrangement and said second pulley and belt drive arrangement each comprise a first pulley, a second pulley and a belt configured to transfer power between said first pulley and said second pulley, respectively, wherein the mechanical coupling permits the tail section to be mounted on the front section without pulling the belt over the first pulley or second pulley of the belt drive arrangements;
- and
- transmitting power from said first pulley and belt drive arrangement to said second pulley and belt drive arrangement with a mechanical coupling comprising a gearwheel connection between said second pulley of said first pulley and belt drive arrangement and said first pulley of said second pulley and belt drive arrangement, such that the first pulley and belt drive arrangement transmits power from the motor to the mechanical coupling and the second pulley and belt drive arrangement transmits power from the mechanical coupling to the torque compensating rotor.
1 more element
Dependencies are inferred from the claim text.