Rotary actuator for leading edge flap of aircraft

Details Rotary actuator for leading edge flap of aircraft Rotary actuator for leading edge flap of aircraft

1988-10-28

1990-12-25

Jordan, Charles T.

Aeronautics and astronautics

Aircraft control

244 90R, 244198, 244201, 244213, 244219, 244231, B64C 900

Patent

active

049797000

ABSTRACT:
A rotary geared actuator for pivotally connecting a flap to a wing of an aircraft, includes at least two adjacent actuator slices rotatably coupled together, each actuator slice including a sun gear rotatably coupled to a drive shaft and having gear teeth with a curved profile to enable movement of the actuator slices with respect to each other in conformance with bending of the wing, planetary gears in surrounding and meshing engagement with the gear teeth of the sun gear, a movable ring gear in surrounding and meshing engagement with the planetary gears, and a fixed ring gear in surrounding and meshing engagement with the planetary gears on opposite sides of the movable ring gear, each fixed ring gear being in meshing engagement only with planetary gears of one actuator slice; at least one fixed side tie bar connecting each fixed ring gear with the wing; at least one movable flap side tie bar connecting each movable ring gear with the flap; securing pins for securing each fixed side tie bar to one fixed ring gear and each movable flap side tie bar to one movable ring gear so as to permit a small axial movement between at least one tie bar and the respective fixed ring gear and/or movable ring gear; and a coupling shaft which flexibly connects an outermost sun gear of the actuator to a drive shaft.

REFERENCES:
patent: 4286761 (1981-09-01), Musgrove

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