Stator assembly and shifting mechanism for a continuously...

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

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F16H 15/52 (2006.01) B62M 11/16 (2006.01) F16H 15/28 (2006.01)

Patent

CA 2756273

A stator assembly for a continuously variable transmission (CVT) having a plurality of traction planet assemblies (142), the stator assembly comprising: a first stator (160) having a plurality of radial guide slots (161); a second stator (64) coaxial with the first stator (160), the first and second stators (160, 164) configured to rotate relative to each other, the second stator (164) having a plurality of radially off-set guide slots (165); characterized in that the stator assembly further comprises: a reaction plate (162) coaxial with the first and second stators (160, 164); a plurality of eccentric gears (168) coupled to the plate (162) and the first stator (160); and a stator driver (166) coupled to each of the eccentric gears (168),- wherein the eccentric gears (168) are provided with a cam lobe (170) adapted to couple to the reaction plate (162); and wherein each eccentric gear (168) is provided with a reaction lobe (172) that is adapted to couple to the second stator (164); and wherein the cam lobe (170) is provided with a rotational center that is off-set from a rotational center of the reaction lobe (172).

L'invention concerne un ensemble stator pour une transmission à variation continue (CVT) ayant une pluralité d'ensembles galets de traction (142). L'ensemble stator selon l'invention comprend un premier stator (160) muni d'une pluralité de fentes de guidage radiales (161), ainsi qu'un deuxième stator (164) coaxial au premier stator (160) et muni d'une pluralité de fentes de guidage (165) décalées radialement, le premier et le deuxième stator (160, 164) étant configurés pour tourner l'un par rapport à l'autre. L'ensemble stator selon l'invention est caractérisé en ce qu'il comprend également une plaque de réaction (162) coaxiale au premier et au deuxième stator (160, 164), une pluralité d'engrenages à excentrique (168) accouplés à la plaque (162) et au premier stator (160), ainsi qu'un entraîneur de stator (166) accouplé à chacun des engrenages à excentrique (168). Selon l'invention, les engrenages à excentrique (168) comportent un bossage de came (170) servant à l'accouplement à la plaque de réaction (162), chaque engrenage à excentrique (168) comporte un bossage de réaction (172) servant à l'accouplement au deuxième stator (164) et le centre de rotation du bossage de came (170) est décalé par rapport au centre de rotation du bossage de réaction (172).

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