Device for autonomous movement of an aircraft on the ground

Details Device for autonomous movement of an aircraft on the ground Device for autonomous movement of an aircraft on the ground

B - Operations, Transporting

64

C

B64C 25/36 (2006.01) B64C 25/40 (2006.01) F16H 35/00 (2006.01)

Patent

CA 2656288

In order to allow an aircraft to move around autonomously on the ground, a system turns at least one wheel of the aircraft. The wheel is coupled to rotational drive means (4) comprising at least one motor coupled to said wheel by a mechanical transmission assembly (42) comprising a mechanical gearbox (6) the reduction ratio of which is continuously variable, for a limited angle of rotation of the wheel (10) of the aircraft, by means of spiral gears (61, 62) the radii of which vary continuously over practically a full revolution of said spiral gears and the reduction ratio of which is constant without limitation of the angle of rotation of the wheel (10) of the aircraft outside of said limited angle of rotation. The continuously variable reduction ratio is used to increase the torque supplied at start-up by the drive means without increasing the capability of the motor in order to be able to obtain the initial torque needed to set the wheels of the aircraft in rotation upon startup.

Pour permettre de manière autonome le roulage d'un aéronef au sol, un système entraîne en rotation au moins une roue de l'aéronef. La roue est couplée à des moyens d'entraînement en rotation (4) comportant au moins un moteur couplé à ladite roue par un ensemble de transmission mécanique (42) comportant un réducteur mécanique (6) dont le rapport de réduction est continûment variable, pour un angle de rotation limité de la roue (10) de l'aéronef, au moyen de roues spirales (61, 62) dont les rayons varient continûment sur sensiblement un tour desdites roues spirales et dont le rapport de réduction est constant sans limitation d'angle de rotation de la roue (10) de l'aéronef en dehors dudit angle de rotation limité. Le rapport de réduction continûment variable est utilisé pour augmenter le couple fourni au démarrage par les moyens d'entraînement sans augmenter les capacités du moteur afin d'obtenir le couple initial nécessaire à la mise en rotation des roues de l'aéronef au démarrage.

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