US 12,203,539 B2
Compact accessory gearbox comprising an integrated electric machine
Clément Falguiere, Moissy-Cramayel (FR); Clément Romain Aimé Cadet, Moissy-Cramayel (FR); Florian Pierre-Yves Chaput, Moissy-Cramayel (FR); and Raphaël Clément Stéphane Martin, Moissy-Cramayel (FR)
Assigned to SAFRAN TRANSMISSION SYSTEMS, Colombes (FR)
Filed by SAFRAN TRANSMISSION SYSTEMS, Colombes (FR)
Filed on Sep. 20, 2023, as Appl. No. 18/470,606.
Claims priority of application No. 2209462 (FR), filed on Sep. 20, 2022.
Prior Publication US 2024/0093773 A1, Mar. 21, 2024
Int. Cl. F16H 57/021 (2012.01); F02C 7/32 (2006.01); F16H 1/22 (2006.01); F16H 57/02 (2012.01)
CPC F16H 57/021 (2013.01) [F02C 7/32 (2013.01); F16H 1/22 (2013.01); F05D 2260/4031 (2013.01); F16H 2057/02026 (2013.01); F16H 2057/02034 (2013.01); F16H 2057/02082 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An accessory gearbox for an aircraft turbomachine, the gearbox comprising a casing defining an enclosure which houses at least one gear train comprising a series of pinions, the casing comprising two flat and opposite parallel side walls between which are mounted shafts supporting each of the pinions of the gear train,
the side walls of the casing each receiving accessories which each comprise a shaft passing through one of the walls and which is coupled to the shaft supporting one of the pinions of the gear train, and one of the side walls being configured to be passed through by a transfer shaft of a power transmission device of the turbomachine which is coupled to a shaft supporting one of the pinions of the gear train,
the side walls of the casing delimiting in the enclosure an internal volume which surrounds a shaft supporting at least one pinion, referred to as a hybridization pinion, the shaft being configured to be surrounded by an electric machine in the gearbox, the machine comprising at least one rotor and one stator, and
the rotor of the electric machine being supported by the shaft supporting the hybridization pinion of the gear train and the stator, extending around the rotor, is mounted within the enclosure in the internal volume, wherein the rotor comprises a face coming into abutment on a portion of the hybridization pinion.