Patent ID: 6968935
Filing Date: 2005-11-29
Classification: F16D,F16H

Abstract:
1. A shift element subassembly for a transmission with two axially adjacent shift elements ( 2 , 3 ) which can be actuated hydraulically or pneumatically, and arranged in a transmission housing ( 1 ) with a common disc carrier ( 4 ) for accommodating external discs ( 20 , 21 ) or internal discs of both shift elements ( 2 , 3 ), whereby the discs of both shift elements ( 2 , 3 ) a rearranged axially adjacent inside the disc carrier ( 4 ) and are separated from each other by a central partition ( 40 ) of the disc carrier ( 4 ), whereby each shift element ( 2 , 3 ) has a piston( 23 , 33 ) and a closing pressure chamber ( 24 , 34 ) for actuation, which are arranged on the side of the disk of the respective shift element ( 2 , 3 ) facing away from the partition ( 40 ) in the region of the front faces ( 41 , 43 ) of the disc carrier ( 4 ), wherein each shift element ( 2 , 3 ) has at least one resetting element ( 27 , 37 , 39 ) for piston resetting which is arranged in the disc carrier ( 4 ) radially above the discs of the respective shift element ( 2 , 3 ), wherein each shift element ( 2 , 3 ) has an additional secondary piston ( 26 , 36 ) that acts through the piston ( 23 , 33 ) of the respective shift element ( 2 , 3 ) against a resetting force of the resetting element ( 27 , 37 , 39 ) of the respective shift element ( 2 , 3 ) on the discs of the respective shift element ( 2 , 3 ), and wherein the resetting elements ( 27 , 37 , 39 ) operate independently of one another and at least one resetting element ( 27 , 37 , 39 ) of the shift element subassembly is constructed as a drain pressure chamber ( 27 , 37 ).