Planetary gear transmission systems or components – Differential planetary gearing – With additional gearset between differential output and load
Patent
1992-12-21
1994-10-25
Wright, Dirk
Planetary gear transmission systems or components
Differential planetary gearing
With additional gearset between differential output and load
F16H 138
Patent
active
053584570
ABSTRACT:
An axle assembly (11) is provided of the type including independent co-axial first (95) and second (103) axle shafts driven by first (89) and second (91) ring gears in mesh, respectively, with first (73) and second (75) drive pinion gears. The assembly includes a differential (23) including a first side gear (31) which drives the pinion gear (73), and a second gear (37) which drives the pinion gear (75). The assembly defines a pair of torque paths which are arranged generally in a mirror image about an axis of rotation (A) of the axle shafts. The differential (23) can be smaller and less expensive because it is located on the "low-torque" upstream side of the pinion gear-ring gear reductions. By dividing total drive torque into two parallel torque paths, each pinion gear and ring gear, and their associated bearings can be substantially smaller and less expensive. Finally, the arrangement disclosed makes it possible to have a number of differential gear mesh frequencies, each transmitting only one-half of the total torque, resulting in substantially reduced noise generation.
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Eaton Corporation
Kasper L. J.
Wright Dirk
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