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US 7,464,896 B2Granted
Apparatus for the adjustment of horizontal stabilizers for aircraft
AssigneeLiebherr-Aerospace Lindenberg GmbH
InventorsUdo Carl, Axel Vötter
Life of this patent
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Abstract
An apparatus is described for the adjustment of horizontal stabilizers for aircraft in relation to the aircraft axis with mechanical power transmission from two drives to the horizontal stabilizer. The apparatus may include two differential transmissions coupled via a connection shaft that drive the horizontal stabilizer via a mechanical transmission, such as a respective spindle and a spindle nut.
Claims11
An apparatus for adjusting a horizontal stabilizer of an aircraft in relation to an aircraft axis, the apparatus comprising:
- two differential transmissions, each having a transmission output shaft, the two differential transmissions coupled via a connection shaft and configured to transmit mechanical power to the horizontal stabilizer from two independent drives via two separate, primary load paths,
- the connection shaft configured to be stationary when the two independent drives have equal speed and to distribute a speed difference between the two independent drives such that the transmission output shafts have equal speed.
An aircraft having an axis, comprising:
- a horizontal stabilizer, the horizontal stabilizer adjustable in relation to the aircraft axis;
- a connection shaft;
- a first drive;
- a second drive independent from the first drive;
- the connection shaft configured to be stationary when the first and second drives have equal speed and to distribute a speed difference between the first and second drives;
- a mechanical transmission;
- a first differential transmission having at least a first input and a first and second output;
- a second differential transmission having at least a first input and a first and second output, where the first and second differential transmissions are coupled via the connection shaft at the first outputs of the differential transmissions, and where the first and second differential transmissions are configured to drive the horizontal stabilizer via the mechanical transmission via a first and second mechanical load path coupled through the second outputs of the differential transmissions, the first mechanical load path between the first drive and the horizontal stabilizer and the second mechanical load path between the second drive and the horizontal stabilizer.
5 more elements
Dependencies are inferred from the claim text.