Planetary gear transmission systems or components – Planetary gearing or element – Plural planet carriers in series move at different speeds
Patent
1990-03-23
1991-01-29
Bonck, Rodney H.
Planetary gear transmission systems or components
Planetary gearing or element
Plural planet carriers in series move at different speeds
F16H 344
Patent
active
049883291
ABSTRACT:
A final drive assembly for transferring power from a vehicle engine and transmission to a vehicle propulsion unit, such as an endless track assembly, has a power input shaft coupled to first and second planetary gear assemblies. The second planetary gear assembly is coupled to a torque tube portion of a sprocket support member for rotating a drive sprocket. The power input shaft, first and second planetary gear assemblies, and the torque tube portion are substantially co-axial, and the first and second planetary gears assemblies are positioned inwardly of the sprocket support member. By positioning the planetary assemblies inwardly of the sprocket support member, additional gears, hubs, splines, and shafts are eliminated and the planetary assemblies are less susceptible to damage. The planetary gear assemblies are substantially free-floating which eliminates the cost and complexity of additional bearing supports.
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Bonck Rodney H.
Caterpillar Inc.
Massey Ryan W.
White Claude F.
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