FLAP DRIVE DEVICE OF ROTOR BLADE

摘要

A flap drive device, wherein the displacements of output parts (35, 36) of a pair of piezo actuators (25, 26) disposed spanwise are increased by a displacement increasing mechanism (27) so as to largely swingably drive a swinging arm (28), a flap (22) which is mounted at the trailing edge of a blade (21) through a connection rod (30) mounted at the tip part of the rotating arm (28) is angularly driven in vertical direction, the displacement increasing mechanism (27) is provided with an eccentric shaft (40) obtained by integrally forming a first shaft (41) and a second shaft (42) having those axes eccentric to each other, the output part (35) is connected to the first shaft (41) and the output part (36) is connected to the second shaft (42), the swinging arm (28) is fixed to the eccentric shaft (40), and the output parts (35, 36) of the actuators (25, 26) are displaced in reverse phase so that the swinging arm (28) can be swung stably, whereby the swinging arm can be swung stably so as to stably drive the flap angularly.