초록 ▼

A flap is attached to a rear end of a blade so as to be angularly displaceable. Displacement magnifying means magnifies the amount of displacement from an actuator to drive the flap. An input portion to which the displacement is applied from the actuator is expandably and contractibly supported by b

A flap is attached to a rear end of a blade so as to be angularly displaceable. Displacement magnifying means magnifies the amount of displacement from an actuator to drive the flap. An input portion to which the displacement is applied from the actuator is expandably and contractibly supported by bellows. Likewise, an output portion to which the input amount of displacement is magnified is expandably and contractibly supported by a bellows. Consequently, displacement magnifying means is realized in which, compared with a existing piston with O ring which slides on the cylinder inner wall, no deterioration in response characteristic due to high friction occurs when the actuator is displaced at high speed, and no fluid leakage due to deterioration or wear of the O ring occurs. According to this structure, a rotor blade flap driving apparatus is obtained which has displacement magnifying means with fast response and no fluid leakage.

대표청구항 ▼

[ What is claimed is:] [1.] A rotor blade flap driving apparatus comprising:a flap angularly displaceably attached to a rear edge of a blade;an actuator for generating a driving force of the flap; anddisplacement magnifying means interposed between the actuator and the flap, for magnifying an amount

[ What is claimed is:] [1.] A rotor blade flap driving apparatus comprising:a flap angularly displaceably attached to a rear edge of a blade;an actuator for generating a driving force of the flap; anddisplacement magnifying means interposed between the actuator and the flap, for magnifying an amount of displacement of the actuator,wherein the displacement magnifying means comprises:a vessel filled with a hydraulic fluid;an input portion to which a displacement from the actuator is transmitted, having an input side pressure surface facing the hydraulic fluid;a first expandable and contractible member for displaceably supporting the input portion and sealing a gap between the input portion and the vessel;an output portion having an output side pressure surface which faces the hydraulic fluid and have a smaller pressure receiving area than that of the input side pressure surface, the output portion being coupled to the flap; anda second expandable and contractible member for displaceably supporting the output portion and sealing a gap between the output portion and the vessel.