Vehicle drivetrain differential

Details Vehicle drivetrain differential Vehicle drivetrain differential

1997-06-25

1999-08-24

Bonck, Rodney H.

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Control of differential planetary gearing

192103F, F16H 4826

Patent

active

059417889

ABSTRACT:
A vehicle drivetrain differential (22) driven by a rotary drive member (24) rotatively drives a pair of rotary members (26, 28) and includes a housing (30) for containing hydraulic fluid and in which a hydraulic coupling (32) is received. A casing (34) of the hydraulic coupling has a ring gear (44) rotatively driven by the rotary drive member (24). A planetary gear set (36) of the bevel gear type is located within the casing (34) and includes a pair of bevel gears (124, 126) having associated spline connections (128, 130) to the pair of rotary members (26, 28), and the planetary gear set also includes planet gears 132 that revolve with the casing 34 and are meshed with both bevel gears to provide a differential gear action. A fluid inlet 58 and an outlet port 78 of the casing are provided with a gerotor type pump (48) provides pumping of hydraulic fluid into and out of the casing. A control valve (80) opens and closes the outlet port (78) in response to the relative rotation between the pair of rotary members to control operation of the pump as a brake in coupling the pair of rotary members (26, 28) to each other.

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