Shift actuator for an electro-mechanical automatic transmission

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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Details

F16H 59/04 (2006.01) F16H 63/18 (2006.01) F16H 3/00 (2006.01) F16H 61/32 (2006.01) F16H 61/688 (2006.01)

Patent

CA 2344419

An electro-mechanical shift actuator system is provided for a transmission (10) having dual input shafts (14, 16) and with a plurality of drive gears rotatably mounted to each input shaft and having synchronizer mechanisms for engaging each drive gear to one of the input shafts. The shift actuators (128, 219) include an electric motor (234) and a reduction gear assembly (236) for driving a barrel shaped shifter cam (230, 262) having a pair of cam grooves (228, 260) therein. The cam grooves are engaged by shifts lugs (224) mounted to a shift rail (220, 222, 256, 258). The shift rails include shift forks (252, 254, 263, 264) for actuating synchronizers (38, 40, 48, 50) mounted on the input shafts for engaging selected drive gears.

L'invention porte sur un système de commande de changement de vitesse électromécanique destiné à une transmission comportant des arbres (14, 16) d'entrée doubles pourvus d'une pluralité de pignons menants montés rotatifs sur chaque arbre et possédant des mécanismes de synchronisation permettant l'engagement de chaque pignon menant sur l'un des arbres d'entrée. Les commandes de changement de vitesse (128, 129) comprennent un moteur (234) électrique et un réducteur (236) destinés à entraîner une came (230, 262) de changement de vitesse de forme cylindrique dotée d'une paire de gorges (228, 260). Ces gorges viennent s'engager sur des ergots (224) montés sur un rail (220, 222, 256, 258). Ces rails comportent des fourchettes (252, 254, 263, 264) destinées à actionner des synchroniseurs (38, 40, 48, 50) montés sur les arbres d'entrée assurant l'engrènement des pignons menants sélectionnés.

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