Self-propelled wheel apparatus of aircraft
AssigneeHarmonic Drive Systems Inc.
InventorYoshihide Kiyosawa
Life of this patent
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Abstract
In a self-propelled wheel apparatus of an aircraft, a drive mechanism composed of a wave gear drive and a motor is coaxially linked to an axle of a wheel via a one-way clutch, and rotational force in the reverse direction of the aircraft is transmitted to the wheel axle via the one-way clutch. When the aircraft moves forward, the link between the wheel axle and an output shaft of the wave gear drive is cut off by the one-way clutch, and motor rotational force is transmitted to the wheel axle, causing the wheel to rotate, only when the aircraft moves backward.
Claims1
A self-propelled wheel apparatus of an aircraft, comprising:
- a motor;
- a wave gear drive for reducing speed of an output rotation of the motor;
- an aircraft wheel that is driven by the reduced-speed output rotation exerted from the wave gear drive;
- and
- a one-way clutch for transmitting only the reduced-speed output rotation in a reverse direction of the aircraft from the wave gear drive to the aircraft wheel, wherein
- the motor, the wave gear drive, the one-way clutch and an axle of the aircraft wheel are arranged coaxially in this order along an axial direction thereof, wherein
- the wave gear drive has an annular rigid internally toothed gear fixed to an internal peripheral surface of an apparatus housing, a cup-shaped flexible externally toothed gear disposed coaxially on an internal side of the internally toothed gear, and a wave generator having an elliptical outline fitted coaxially into an internal side of the externally toothed gear, and
- an output shaft of the motor is coaxially linked and fixed to the wave generator, and an output shaft formed in a center of a cup bottom portion of the flexible externally toothed gear is coaxially linked to the wheel axle via the one-way clutch.
Dependencies are inferred from the claim text.