Planetary gear transmission systems or components – Differential planetary gearing – Bevel gear differential
Patent
1995-01-13
1996-07-02
Marmor, Charles A.
Planetary gear transmission systems or components
Differential planetary gearing
Bevel gear differential
475239, F16H 4822
Patent
active
055316530
ABSTRACT:
A selectively lockable differential assembly comprising a rotatable case, first and second output shafts journalled in the case for rotation relative thereto, and a differential mechanism disposed within the case and linking the two output shafts so as to permit differential rotation between the two shafts. The assembly further includes first and second clutches each connected to the case and coupled with one of the output shafts. The differential mechanism includes a pinion shaft, upon which spaced apart pinion gears are rotatably mounted, and a pair of side gears rigidly affixed to corresponding ones of the output shafts, which meshingly engage the pinion gears. The pinion shaft includes a cam portion disposed between the inboard ends of the two output shafts. Rotation of the pinion shaft about its longitudinal centerline axis engages the two clutches and therefore limits differential rotation between the two output shafts. The pinion shaft is rotated by an actuator assembly which includes a shift arm extending through a window formed in the case and having one end attached to the pinion shaft and the opposite end engaging a shift collar piloted on an exterior surface of the case. A shift fork partially encircles the shift collar and is attached to a linear actuator which preferably comprises a vacuum motor. The differential assembly may be rotatably supported within an axle carrier housing or a transfer case.
REFERENCES:
patent: 2234592 (1941-03-01), Fitzner
patent: 2424942 (1947-07-01), Mynssen
patent: 2501956 (1950-03-01), Misener
patent: 3837236 (1974-09-01), Kagata
patent: 4526063 (1985-07-01), Oster
patent: 4679463 (1987-07-01), Ozaki et al.
patent: 4825724 (1989-05-01), Shibuya et al.
patent: 5125876 (1992-06-01), Hirota
Dana Corporation
Estremsky Sherry
Marmor Charles A.
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