Fin control surface driving device

Abstract

The application provides a tail rudder driving device, and relates to the technical field of unmanned aerial vehicles.The tail rudder driving device comprises a transmission assembly, a driving mechanism and a rudder assembly.The transmission assembly comprises a first transmission arm, a transmission shaft and a second transmission arm.The first transmission arm is fixedly connected with the transmission shaft, and the transmission shaft is movably connected with the second transmission arm to adjust the length of the second transmission arm.The minimum length of the second transmission arm is greater than that of the first transmission arm.The driving mechanism is fixedly connected with the first transmission arm and is used for driving the first transmission arm to rotate.The rudder assembly is fixedly connected with the second transmission arm, so that the driving mechanism drives the rudder to rotate through the first transmission arm, the transmission shaft and the second transmission arm.Because the length of the second transmission arm is greater than that of the first transmission arm, according to the torque transmission principle, the torque is amplified through the length difference when the torque is transmitted through the transmission assembly, so that the tail rudder driving device with a small volume installed in the fuselage can output greater torque and meet the deflection requirements of the rudder.

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