US 11,719,329 B2
Planetary reducing gearset comprising a prestressed flexible support
Arnaud Nicolas Negri, Moissy-Cramayel (FR); Julien Fabien Patrick Becoulet, Moissy-Cramayel (FR); Romain Guillaume Cuvillier, Moissy-Cramayel (FR); and Emmanuel Pierre Dimitri Patsouris, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/430,172
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Feb. 5, 2020, PCT No. PCT/HR2020/050193
§ 371(c)(1), (2) Date Aug. 11, 2021,
PCT Pub. No. WO2020/165523, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 19 01496 (FR), filed on Feb. 14, 2019.
Prior Publication US 2022/0154815 A1, May 19, 2022
Int. Cl. F16H 57/08 (2006.01); F16H 1/28 (2006.01); F01D 15/12 (2006.01)
CPC F16H 57/082 (2013.01) [F01D 15/12 (2013.01); F16H 1/28 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A reducing gearset comprising:
a sun gear and a ring gear both mobile in rotation relatively to a longitudinal axis; and
a flexible planet carrier that is fixed in rotation relatively to the longitudinal axis, the planet carrier carrying planet gears that are engaged with the sun gear that the planet gears surround and with the ring gear that surrounds the planet gears, the planet carrier being connected to a case that surrounds the planet carrier by at least first and second separate connections that are spaced along the longitudinal axis, with prestress means to pretension the planet carrier between the first and second connections in torsion,
wherein the first connection, which is between the planet carrier and the case, is a dog-type connection, comprising external teeth carried by the planet carrier and internal teeth carried by the case, and in which the prestress means are carried by the at least one of the external teeth and internal teeth.