Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1996-10-16
1998-09-08
Marmor, Charles A.
Machine element or mechanism
Gearing
Directly cooperating gears
74409, 74410, 74665A, 74665GC, F16H 122, F16H 5520
Patent
active
058029184
ABSTRACT:
A concentric face gear assembly includes a first face gear having first face gear teeth and second face gear having second face gear teeth. At least one input pinion contacts both the first face gear teeth and the second face gear teeth, and at least one idler pinion contacts both the first face gear teeth and the second face gear teeth. The first face gear is adapted for directly driving a rotor, but the second face gear is not adapted for directly driving a rotor. The load carried by the first face gear includes the force needed to drive the rotor. Since it does not drive a rotor, the second face gear does not comprise a web or spline attachment and is therefore lightweight. Both the first face gear and the second face gear include thrust bearings, which are located radially outwardly of the first face gear teeth and radially inwardly of the second face gear teeth. The first face gear includes a web, which is relatively thin due to the thrust bearing of the first face gear being located radially outwardly of the first face gear teeth rather than radially inwardly of the first face gear teeth.
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Chen Yih-Jen D.
Gilbert Ronald E.
Heath Gregory F.
Morris Michael T.
Sheth Vijay J.
Estremsky Sherry Lynn
Marmor Charles A.
McDonnell Douglas Helicopter Co.
Stout Donald E.
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