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US 10,760,665 B2Granted
Governor drive gear for integrated drive generator
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 drive gear for use in an integrated drive generator has a gear body extending between a first end and a second end and having a disc extending radially outwardly. A boss extends from the disc toward the second end. There are outer gear teeth outwardly of an outer diameter of the disc. The outer gear teeth have a unique gear tooth profile with roll angles A, B, C, and D. An integrated drive generator and a method are also disclosed.
Claims14
A governor drive gear for use in an integrated drive generator comprising:
- 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, there being outer gear teeth outwardly of an outer diameter of said disc, said outer gear teeth having a gear tooth profile with roll angles A, B, C, and D, and the roll angle at A for said outer gear teeth being between 20.9 and 22.4 degrees, the roll angle at B for said outer gear teeth being between 22.8 and 24.3 degrees, the roll angle at C for said outer gear teeth being between 28.4 and 29.9 degrees, and the roll angle at D for said outer gear teeth being between 30.2 and 31.7 degrees;
- wherein said outer gear teeth have a pitch diameter of 3.00 inches (7.62 centimeters) with a tolerance of +/−0.01 inch (0.025 centimeters);
- wherein there are 60 of said outer gear teeth;
- and
- wherein said outer gear teeth have a maximum form diameter of 2.91 inches (7.39 centimeters) with a tolerance of +/−0.01 inch (0.025 centimeters).
2 more elements
An integrated drive generator comprising:
- an input shaft, a gear differential including a carrier shaft connected said input shaft and including a ring gear connected to a generator;
- said ring gear also connected to an accessory drive gear, said accessory drive gear connected to an intermediate gear, connected to a governor drive gear;
- said governor drive gear comprising 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, there being outer gear teeth outwardly of an outer diameter of said disc, said outer gear teeth having a gear tooth profile with roll angles A, B, C, and D, and the roll angle at A for said outer gear teeth being between 20.9 and 22.4 degrees, the roll angle at B for said outer gear teeth being between 22.8 and 24.3 degrees, the roll angle at C for said outer gear teeth being between 28.4 and 29.9 degrees;
- the roll angle at D for said outer gear teeth being between 30.2 and 31.7 degrees;
- and
- said outer gear teeth engaged to said intermediate gear and said governor drive gear connected to a governor.
3 more elements
A method of replacing a governor drive gear comprising the steps of:
- a) removing an existing governor 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 connected to a generator, said ring gear also connected for driving an accessory drive gear, said accessory drive gear being connected to an intermediate gear, which is connected to said existing governor drive gear;
- and
- b) replacing the existing governor drive gear with a replacement governor 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, there being outer gear teeth outwardly of an outer diameter of said disc, said outer gear teeth having a gear tooth profile with roll angles A, B, C, and D, and the roll angle at A for said outer gear teeth being between 20.9 and 22.4 degrees, the roll angle at B for said outer gear teeth being between 22.8 and 24.3 degrees, the roll angle at C for said outer gear teeth being between 28.4 and 39.9 degrees, and the roll angle at D for said outer gear teeth being between 30.2 and 31.7 degrees.
Dependencies are inferred from the claim text.