초록 ▼

Displacements of output portions 35, 36 of a pair of piezoelectric actuators 25, 26 arranged spanwise in a flap drive apparatus are magnified by a displacement magnification mechanism 27 so that a swing arm 28 is driven in swinging fashion with large amplitude. A flap 22 attached to the trailing edg

Displacements of output portions 35, 36 of a pair of piezoelectric actuators 25, 26 arranged spanwise in a flap drive apparatus are magnified by a displacement magnification mechanism 27 so that a swing arm 28 is driven in swinging fashion with large amplitude. A flap 22 attached to the trailing edge of a blade 21 by way of a connecting rod 30 connected to a tip of the swing arm 28 is driven in vertical angular displacement fashion. The displacement magnification mechanism 27 possesses an eccentric shaft 40 has a first shaft 41 and second shaft 42 with offset axes. An output portion 35 is coupled to the first shaft 41, and an output portion 36 is coupled to the second shaft 42. The swing arm 28 is fixed to the eccentric shaft 40. Displacement of the output portions 35, 36 of the actuators 25, 26 in opposite phase results in a stable swing of the swing arm 28.

대표청구항 ▼

1. A rotor blade flap drive apparatus comprising:a flap attached to a trailing edge of a blade so as to permit vertical angular displacement of the flap; a pair of actuators housed within the blade and having output portions which are operable to be displaced in opposite phases; a swing arm having a

1. A rotor blade flap drive apparatus comprising:a flap attached to a trailing edge of a blade so as to permit vertical angular displacement of the flap; a pair of actuators housed within the blade and having output portions which are operable to be displaced in opposite phases; a swing arm having a base portion coupled to the respective output portions of the pair of actuators so as to be angularly movable, and having a tip at an end of the swing arm opposite to the base portion and operable to swing in a lead direction and a lag direction; and a connecting rod connecting the tip of the swing arm and the flap.