INCORPORATION OF A GEAR TRAIN IN A PINION WALL IN A GEARBOX FOR A TURBOMACHINE

• US 20160146291A1
• Filed: 07/09/2014
• Published: 05/26/2016
• Est. Priority Date: 07/10/2013
• Status: Active Grant

• Current Assignee: Safran Transmission Systems
• Original Assignee: Hispano Suiza SA (Safran SA)
• Inventors: Prunera-Usach, Stephane, Beck, Guillaume, Peltier, Jordane
• Granted Patent: US 10,233,998 B2
• Time in Patent Office: Days
• CPC Class Codes: F02C 7/32 Arrangement, mounting, or driving, of auxiliaries
• CPC Class Codes: F05D 2220/323 for aircraft propulsion, e.g. jet engines
• CPC Class Codes: F05D 2260/40311 of the epicyclical, planetary or differential type
• CPC Class Codes: F16H 1/28 with gears having orbital motion
• CPC Class Codes: F16H 1/2854 involving conical gears
• CPC Class Codes: F16H 57/082 Planet carriers

Abstract

An aircraft drive chain including a plurality of main pinions meshing with each other, a first main pinion including a wall delimiting an inner volume, external teeth being provided on an outer surface of the wall, the external teeth meshing with at least one second main pinion, a gear system being incorporated in the inner volume, the first main pinion and the gear system being jointly configured to form a multiplier or reducer and to ensure a mechanical energy transfer between a driving member and a slave member.

Claims

1. An aircraft drive chain comprising a plurality of main pinions meshing with each other, a first main pinion including a wall delimiting an inner volume, external teeth being provided on an outer surface of the wall, the external teeth meshing with at least one second main pinion, a gear system being incorporated into the inner volume, the first main pinion and the gear system being jointly configured to form a multiplier or reducer and to ensure a mechanical energy transfer between a driving member and a slave member.

2. The drive chain according to claim 1, the gear system including an annulus member, at least two planet pinions, a planet carrier member and sun teeth, the sun teeth being provided on a shaft connected to the driving member or to the slave member, internal teeth being provided on an inner surface of the annulus member, the planet pinions meshing with the internal teeth and with the sun teeth.

3. The drive chain according to claim 2, the annulus member including the wall of the first main pinion, the planet carrier member being stationary with respect to an aircraft mount.

4. The drive chain according to claim 2, the annulus member including an annular wall stationary with respect to an aircraft mount, the planet carrier member being fixed to the pinion and stationary with respect to the same.

5. The drive chain according to claim 2, all the gears of the gear system being arranged so as to be crossed by a same mid-plane P crossing the external teeth.

6. The drive chain according to claim 2, the gear system including at least one planet pinion having first and second teeth of different diameters.

7. The drive chain according to claim 1, a motion input towards the first main pinion being made by the external teeth.

8. The drive chain according to claim 1, a motion input towards the first main pinion being made through the shaft connected to the driving member or through another shaft connected to the pinion and coaxial to the shaft.

9. The drive chain according to claim 1, the first main pinion being part of a bevel gear.

10. The drive chain according to claim 1, for an accessory gearbox driving device.

11. An accessory gearbox including a drive chain according to claim 1.