Accessory drive gear for a differential

Patent metadata

Field	Value
Publication number	US-9470302-B1
Application number	US-201514678307-A
Country	US
Kind code	B1
Filing date	Apr 3, 2015
Priority date	Apr 3, 2015
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

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 for an integrated drive generator, comprising:
a gear body having an outer diametric edge, an inner diametric wall, and an inner diametric edge,
wherein the outer diametric edge includes a plurality of outer gear teeth,
wherein a number of the plurality of outer gear teeth is 50.

2. The accessory drive gear of claim 1 , wherein at least one of the plurality of outer gear teeth has a carbonized side.

3. The accessory drive gear of claim 1 , wherein the inner diametric wall includes a notch.

4. The accessory drive gear of claim 3 , wherein a width of the notch is 0.197 inches.

5. The accessory drive gear of claim 3 , wherein a distance between a face of the notch and a portion of the inner diametric wall is 2.027 inches.

6. The accessory drive gear of claim 1 , wherein a diameter of the accessory drive gear is 2.5 inches.

7. The accessory drive gear of claim 1 , wherein a diameter of the inner diametric wall is 1.952 inches.

8. The accessory drive gear of claim 1 , wherein a diameter of inner diametric edge is 2.018 inches.

9. The accessory drive gear of claim 1 , wherein a surface connects the inner diametric wall with the inner diametric edge.

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

11. The accessory drive gear of claim 9 , wherein the inner diametric edge is a part of the inner diametric wall.

12. The accessory drive gear of claim 1 , wherein a thickness of the accessory drive gear is 0.395 inches.

13. The accessory drive gear of claim 1 , wherein the accessory drive gear is included in a differential of the integrated drive generator,
wherein the differential is operatively coupled to an input system, and
wherein the differential is operatively coupled to a generator.

14. The accessory drive gear of claim 1 , wherein the accessory drive gear 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.

15. An accessory drive gear for an integrated drive generator, comprising:
a gear body having an outer diametric edge, an inner diametric wall, and an inner diametric edge,
wherein the outer diametric edge includes a plurality of outer gear teeth,
wherein a diameter of the accessory drive gear is 2.5 inches.

16. The accessory drive gear of claim 15 , wherein a surface connects the inner diametric wall with the inner diametric edge.

17. The accessory drive gear of claim 15 , wherein the accessory drive gear is included in a differential of the integrated drive generator.

18. An accessory drive gear for an integrated drive generator, comprising:
a gear body having an outer diametric edge, an inner diametric wall, and an inner diametric edge,
wherein the outer diametric edge includes a plurality of outer gear teeth,
wherein the inner diametric wall includes a notch, and
wherein a width of the notch is 0.197 inches.

19. The accessory drive gear of claim 18 , wherein a distance between a face of the notch and a portion of the inner diametric wall is 2.027 inches.

20. The accessory drive gear of claim 18 , wherein the accessory drive gear is included in a differential of the integrated drive generator.

Assignees

• Hamilton Sundstrand Corp

Inventors

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

Classifications

• F16H47/00

  Combinations of mechanical gearing with fluid clutches or fluid gearing · CPC title

• F16H55/06

  Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties · CPC title

• F16H55/17 Primary

  Toothed wheels (worm wheels F16H55/22; chain wheels F16H55/30) · CPC title

• F16H48/06

  with gears having orbital motion · CPC title

• B64D41/00

  Power installations for auxiliary purposes · CPC title