Locking differential

Details Locking differential Locking differential

1997-09-26

1999-03-16

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Control of differential planetary gearing

474 84, 474249, F16H 144

Patent

active

058822720

ABSTRACT:
A locking differential has a fixed drive dog and a movable drive dog. A locking actuator has a plunger drivingly connected to the movable drive dog. The plunger is movable in a first direction to a lock position in which the drive dogs are engaged and in a second, opposite direction to an unlock position in which the drive dogs are disengaged. A piston is connected to the plunger and disposed in a cavity in a housing. Movement of the piston in the second direction is imparted to the plunger when the plunger is in the lock position but the piston is movable independently relative to the plunger in the first direction when the plunger is in the unlock position. A pressurized fluid causes the piston, and thereby the plunger, to move in the second direction. A piston bias member biases the piston in the first direction, and a plunger bias member biases the plunger in the first direction. A related method of locking the differential is also disclosed.

REFERENCES:
patent: 3899938 (1975-08-01), Crabb
patent: 3973450 (1976-08-01), Shealy
patent: 4462271 (1984-07-01), Stieg
patent: 4583424 (1986-04-01), von Hiddessen et al.
patent: 4625584 (1986-12-01), Onodera
patent: 5117956 (1992-06-01), Tsujita
patent: 5176590 (1993-01-01), Haydock
patent: 5431603 (1995-07-01), Aho

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