Planetary gear transmission systems or components – Differential planetary gearing – Spur gear differential
Patent
1992-11-17
1994-03-22
Wright, Dirk
Planetary gear transmission systems or components
Differential planetary gearing
Spur gear differential
475160, F16H 142
Patent
active
052959236
ABSTRACT:
A parallel-axis gear differential includes pairs of element gears (34) mounted within pockets (36) formed in a differential housing (10). Each element gear includes a first gear section (38) for meshing with one of two side gears (30 or 32), a second gear section (40) for meshing with the first gear section of its mating element gear, and a stem section (42) for interconnecting the first two gear sections. Associated with each pair of pockets are two passageways (44, 46) for providing respective paths for the flow of lubrication fluid between the exterior of the housing and the respective meshing gear sections (38, 40) of each pair of element gears (34). Further, the shape of each pair of pockets (36) is modified between its apron portions (a) and its opening (b) to increase the space between the pocket and the mating surfaces of the element gears. This increased space at the pocket opening allows a greater volume of lubricating fluid to be moved by the rotating teeth of element gears, reducing the fluid pressure between the interior portion of the pockets and the surface of the element gears, and thereby increasing the flow of lubricating fluid to facilitate lubrication.
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patent: 5122101 (1992-06-01), Tseng
Wright Dirk
Zexel-Gleason USA, Inc.
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