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US 10,599,165 B2Granted
Governor and inversion pump drive gear
AssigneeHamilton Sundstrand Corporation
InventorsDerek R. Hochstetler, Ted A. Martin, Duane C. Johnson, Glenn C. Lemmers, Jr.
Life of this patent
Estimating the term…
Abstract
A governor and inversion pump drive gear for an integrated drive generator has a gear body extending from a first end to a second end. There is an enlarged disc between the first and second ends. A boss extends from the enlarged disc toward the second end and has an internal bore with spline teeth. The enlarged disc has input gear teeth at an outer periphery. A shaft portion extends from the disc to the first end. A flange is formed at a location intermediate the first end and the enlarged disc. The inner gear teeth and the drive gear teeth have unique tooth profiles. An integrated dive generator and a method are also disclosed.
Claims20
A governor and inversion pump drive gear for an integrated drive generator comprising:
- a gear body extending from a first end to a second end, there being an enlarged disc between said first and second ends, and a boss extending from said enlarged disc toward said second end, and having an internal bore with spline teeth;
- said enlarged disc having input gear teeth at an outer periphery, and a shaft extending from said disc to said first end, with a flange formed at a location intermediate said first end and said enlarged disc, and drive gear teeth formed on an outer periphery of said flange, with said input gear teeth having a gear tooth profile defined by roll angles at points A, B, C, and D, with the input gear tooth profile having a roll angle at point A between 20.9 and 22.3 degrees, a roll angle at point B between 22.7 and 24.2 degrees, a roll angle at point C between 28.2 and 29.7 degrees, and a roll angle at point D between 30.0 and 31.5 degrees, and said drive gear teeth having a gear tooth profile defined by roll angles at points A, B, C and D, with a drive gear tooth profile at point A having a roll angle of between 14.7 and 16.2 degrees, a roll angle at point B of between 18.7 and 20.2 degrees, a roll angle at point C of between 30.3 and 31.8 degrees, and a roll angle at point D of between 34.2 and 35.7 degrees.
An integrated drive generator comprising:
- an input shaft, a gear differential including a carrier shaft being driven by said input shaft and including a ring gear connected for driving a generator;
- said ring gear also connected to drive an accessory drive gear, said accessory drive gear connected to drive a governor and inversion pump drive gear;
- and
- said governor and inversion pump drive gear including a gear body extending from a first end to a second end, there being an enlarged disc between said first and second ends, and a boss extending from said enlarged disc toward said second end, and having an internal bore with spline teeth receiving a shaft to drive an inversion pump;
- said enlarged disc having input gear teeth at an outer periphery, said input gear teeth engaged with teeth on said accessory drive gear and a shaft portion extending from said disc to said first end, with a flange formed at a location intermediate said first end and said disc, and drive gear teeth formed on an outer periphery of said flange, with said input gear teeth having a gear tooth profile defined by roll angles at points A, B, C, and D, with the input gear tooth profile having a roll angle at point A between 20.9 and 22.3 degrees, a roll angle at point B between 22.7 and 24.2 degrees, a roll angle at point C between 28.2 and 29.7 degrees, and a roll angle at point D between 30.0 and 31.5 degrees, and said drive gear teeth having a gear tooth profile defined by roll angles at point A-D, with a drive gear tooth profile having a roll angle at point A of between 14.7 and 16.2 degrees, a roll angle point at B of between 18.7 and 20.2 degrees, a roll angle at point C of between 30.3 and 31.8 degrees, and a roll angle at point D of between 34.2 and 35.7 degrees.
2 more elements
A method of replacing a governor and inversion pump drive gear comprising the steps of:
- removing an existing governor and inversion pump drive gear from an integrated drive generator having an input shaft, a gear differential including a carrier shaft and the gear differential including a ring gear for driving a generator, said ring gear also connected for driving an accessory drive gear, said accessory drive gear connected to drive the existing governor and inversion pump drive gear;
- and
- replacing the existing governor and inversion pump drive gear with a replacement governor and inversion pump drive gear including a gear body extending between a first end and a second end and having a disc extending radially outwardly, and a boss extending from said disc toward said second end, and having splines in an internal bore, and a shat extending from said disc toward said second end, a flange on said shaft, and drive gear teeth formed on said flange, there being input gear teeth outwardly of an outer diameter of said disc, said input gear teeth having a gear tooth profile with roll angles A, B, C, and D, and the input gear profile having a roll angle at point A between 20.9 and 22.3 degrees, a roll angle at point B between 22.7 and 24.2 degrees, a roll angle at point C being between 28.2 and 29.7 degrees, and a roll angle at point D being between 30.0 and 31.5 degrees, and said drive gear teeth having a gear tooth profile defined by roll angles at points A, B, C and D, with a drive gear tooth profile at point A having a roll angle of between 14.7 and 16.2 degrees, a roll angle at point B of between 18.7 and 20.2 degrees, a roll angle at point C of between 30.3 and 31.8 degrees, and a roll angle at point D of between 34.2 and 35.7 degrees.
Dependencies are inferred from the claim text.