A transmission device (34) to divide the torque between two coaxial gears (14,15) of a planetary gear train (1) for aeronautical applications, the device comprising a motion input member (3) and a first and a second transmission member (36,37), which are coaxial to each 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 radially outwards from the first and second shaft, at the opposite axial end with respect to the first and second gear (14,15), are axially facing and arranged abutting against each other, and are fixed to the motion input member (3) so as to divide the torque transmitted by the motion input member (3) between the first and second flange; the second shaft (39) being axially hollow; the first shaft (38) comprising a first intermediate portion (43) having an outside diameter smaller than the inside diameter of the second shaft (39) and housed at least with radial clearance in the second shaft (39); the first and second flange (50, 51) comprise respective portions (52, 53) configured so as to deform under the action of forces acting between the motion input member (3) and the first and second gear (14,15) so as to enable a fluctuation, within a predetermined maximum deflection, of the first and second shaft (38, 39) with respect to an axis perpendicular to the axis (A).
TRANSMISSION DEVICE FOR DIVIDING THE TORQUE BETWEEN TWO COAXIAL GEARS, IN PARTICULAR FOR A PLANETARY GEAR TRAIN FOR AERONAUTICAL APPLICATIONS
DISPOSITIF DE TRANSMISSION DESTINE A DIVISER LE COUPLE SUR DEUX ENGRENAGES COAXIAUX, EN PARTICULIER DESTINE A UN TRAIN D'ENGRENAGES PLANETAIRES DANS LES APPLICATIONS AERONAUTIQUES
2019-01-21
Patent
Electronic Resource
English
Torque dividing gear transmission speed reducer for coaxial helicopter main speed reducer
European Patent Office | 2021
|Torque dividing transmission speed reducer for coaxial helicopter
European Patent Office | 2021
|