Planetary gear carrier having a band brake on an axial extension of the carrier for transfer cases

A two speed transfer case assembly includes a planetary gear speed reduction assembly, a shift sleeve for selecting either reduced speed drive through the planetary gear assembly or direct drive from the transfer case input. The planet carrier of the speed reduction assembly includes a band brake di...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WEILANT, DAVID R
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES BLASTING ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A two speed transfer case assembly includes a planetary gear speed reduction assembly, a shift sleeve for selecting either reduced speed drive through the planetary gear assembly or direct drive from the transfer case input. The planet carrier of the speed reduction assembly includes a band brake disposed thereabout. A linear actuator selectively, adjustably tightens the band brake to control retardation of the planet carrier thereby controlling the speed of the carrier and thus the output of the planetary gear assembly. This configuration cancels the drag torque typically applied to the input of a transfer case from the associated automatic transmission and minimizes or eliminates the relative rotation between the shifting elements in the transfer case allowing smoother shifts. When fully engaged, the planetary carrier brake can also serve as a wet parking brake.