Accessory drive gear hub for a differential

Patent metadata

Field	Value
Publication number	US-9695926-B2
Application number	US-201514678333-A
Country	US
Kind code	B2
Filing date	Apr 3, 2015
Priority date	Apr 3, 2015
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

Embodiments herein relate to piece-part, sub-assembly, assembly, and component levels of a differential composed of a sun gear configuration and utilized in an integrated drive generator. An integrated drive generator is a hydro-mechanical transmission that drives a synchronous salient pole generator. The integrated drive generator is a constant speed output, variable speed input transmission that includes the differential and a hydraulic unit. In general, the integrated drive generator utilizes the variable speed input from an accessory gear box of an engine to drive or control a hydraulic unit, which in turn drives or controls a churn leg member of the differential. As the differential is driven, speeds of each speed member of the differential are then summed to generate the constant speed output to drive the synchronous salient pole generator.

First claim

The invention claimed is:

1. An accessory drive gear hub for an integrated drive generator, comprising:
a gear body having a first diametric wall, a second diametric wall, and an interior platform that connects the first and second diametric walls,
wherein the interior platform includes a plurality of interior surface holes; and
a flange includes at least one of a plurality of fastening holes configured to attach the accessory drive gear hub to a gear,
wherein the accessory drive gear hub is included in a differential of the integrated drive generator,
wherein the differential is operatively coupled to an input system via an input drive gear, and
wherein the differential is operatively coupled to a generator via an output driven gear.

2. The accessory drive gear hub of claim 1 , wherein a height of the flange is 0.1 inches.

3. The accessory drive gear hub of claim 1 , wherein the first diametric wall includes a wall hole.

4. The accessory drive gear hub of claim 3 , wherein a distance between a geometric center of wall hole to and a surface of the flange is 0.74 inches.

5. The accessory drive gear hub of claim 1 , wherein a diameter of an inner wall portion of the first diametric wall is 1.6 inches.

6. The accessory drive gear hub of claim 1 , wherein a diameter of an inner wall portion of the second diametric wall is 4.3 inches.

7. The accessory drive gear hub of claim 1 , further comprising:
a groove that connects the first diametric wall and the interior platform.

8. The accessory drive gear hub of claim 7 , wherein the groove includes a depth of 0.01 inches and a width of 0.04 inches.

9. The accessory drive gear hub of claim 1 , wherein a height of the first diametric wall and an edge surface of the accessory drive gear hub is 0.3 inches.

10. The accessory drive gear hub of claim 9 , wherein the edge surface is angled at 30 degrees.

11. The accessory drive gear hub of claim 1 , wherein a number of the plurality of interior surface holes is 10.

12. The accessory drive gear hub of claim 11 , wherein at least one of the plurality of interior surface holes has a diameter of 0.850 inches.

13. An accessory drive gear hub for an integrated drive generator, comprising:
a gear body having a first diametric wall, a second diametric wall, and an interior platform that connects the first and second diametric walls,
wherein the interior platform includes a plurality of interior surface holes; and
a flange includes at least one of a plurality of fastening holes configured to attach the accessory drive gear hub to a gear,
wherein the accessory drive gear hub is included in a differential of the integrated drive generator,
wherein the differential is in-line with a hydraulic unit of the integrated drive generator, and
wherein the hydraulic unit comprises at least one pump.

14. The accessory drive gear hub of claim 13 , wherein a height of the flange is 0.1 inches.

15. The accessory drive gear hub of claim 13 , wherein the first diametric wall includes a wall hole.

16. The accessory drive gear hub of claim 15 , wherein a distance between a geometric center of wall hole to and a surface of the flange is 0.74 inches.

17. The accessory drive gear hub of claim 13 , wherein a diameter of an inner wall portion of the first diametric wall is 1.6 inches.

18. The accessory drive gear hub of claim 13 , wherein a diameter of an inner wall portion of the second diametric wall is 4.3 inches.

19. The accessory drive gear hub of claim 13 , further comprising:
a groove that connects the first diametric wall and the interior platform.

20. The accessory drive gear hub of claim 19 , wherein the groove includes a depth of 0.01 inches and a width of 0.04 inches.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Lemmers Jr Glenn C
• Finke Aaron M
• Smith Doren C
• Grosskopf Andrew P
• Behling David S

Classifications

• F16H57/0025 Primary

  with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods · CPC title

• F16H2057/02043

  for vehicle transmissions · CPC title

• F16D1/06

  for attachment of a member on a shaft or on a shaft-end (attachment of marine propellers on shafts B63H23/34) · CPC title

• F16H47/04

  the mechanical gearing being of the type with members having orbital motion · CPC title

• F16H48/06

  with gears having orbital motion · CPC title