TRANSMISSION DEVICE FOR DIVIDING THE TORQUE BETWEEN TWO COAXIAL GEARS, IN PARTICULAR FOR A PLANETARY GEAR TRAIN FOR AERONAUTICAL APPLICATIONS

摘要

A transmission device (34) to divide the torque between two coaxial gears(14,15) of aplanetary gear train (1) for aeronautical applications, the device comprisinga motion inputmember (3) and a first and a second transmission member (36,37), which arecoaxial toeach other and to said motion input member (3) along a longitudinal axis (A)and comprise:- a first and, respectively, a second shaft (38,39) having a first gear (14)and, respectively,a second gear (15) at an axial end;- a first and, respectively, a second flange (50,51), which project radiallyoutwards fromthe first and second shaft, at the opposite axial end with respect to thefirst and second gear(14,15), are axially facing and arranged abutting against each other, and arefixed to themotion input member (3) so as to divide the torque transmitted by the motioninput member(3) between the first and second flange;the second shaft (39) being axially hollow; the first shaft (38) comprising afirstintermediate portion (43) having an outside diameter smaller than the insidediameter ofthe second shaft (39) and housed at least with radial clearance in the secondshaft (39);the first and second flange (50, 51) comprise respective portions (52, 53)configured so asto deform under the action of forces acting between the motion input member(3) and thefirst and second gear (14,15) so as to enable a fluctuation, within apredeterminedmaximum deflection, of the first and second shaft (38, 39) with respect to anaxisperpendicular to the axis (A).