Compounder assembly with controllable overrunning clutch

Details Compounder assembly with controllable overrunning clutch Compounder assembly with controllable overrunning clutch

1999-09-17

2000-11-21

Marmor, Charles A

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

475311, 475312, 192 12R, 192 13R, F16H 344

Patent

active

061495433

ABSTRACT:
A transmission compounder assembly having a one-way clutch between an input shaft and an output shaft to establish a direct-ratio drive path therebetween. A planetary gearset can be selectively engaged to establish a compound-ratio drive path between the shafts. The planetary gearset includes a sun gear, a ring gear fixed to the output shaft, a carrier fixed to the input shaft, and a plurality of planet gears rotatably supported from the carrier and meshed with both the ring gear and the sun gear. A band brake is provided for selectively braking the sun gear. A controllable overrunning clutch is mounted between the carrier and the sun gear and can be selectively shifted between a locked mode and a released mode. The compounder assembly further includes an actuator for controlling actuation of the band brake and the overrunning clutch. The compounder assembly is operable in a direct drive mode wherein the band brake is released and the overrunning clutch is in its locked mode to couple the sun gear for common rotation with the carrier. As such, the one-way clutch functions to transfer rotary power from the input shaft to the output shaft while the overrunning clutch absorbs any reverse relative rotation. In addition, an overdrive mode is established by shifting the overrunning clutch into its released mode and engaging the band brake such that the sun gear is braked and the ring gear drives the output shaft at a non-direct speed relative to the input shaft.

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