Patent ID: 8277359
Filing Date: 2012-10-02
Classification: F16H,Y10T

Abstract:
1. An automatic transmission, comprising: a transmission mechanism including plural planetary gear sets; a transmission case storing the transmission mechanism therein; and an end cover closing an opening at one end of the transmission case, wherein one of said plural planetary gear sets which is disposed the closest to said end cover is assembled in such a manner that before the end cover is attached to said transmission case, a sun gear thereof is assembled to the transmission case and a pinion carrier thereof is assembled to the end cover, then a thrust bearing member is disposed between an end face of said sun gear assembled to the transmission case and an end face of an inner peripheral portion of said pinion carrier assembled to the end cover, and finally said end cover with the assembled pinion carrier is attached to said transmission case with the assembled sun gear, the thrust bearing member being a member for adjusting a gap which is formed in an axial direction in the transmission case, said member being selected from plural ones which have different axial thicknesses from each other, and means for preventing the pinion carrier which has been assembled to the end cover from dropping off the end cover is provided, said means being a piston cylinder which is disposed at a specified location on an outer peripheral side of said planetary gear set and stores a piston for pressing frictional elements of a brake device which is assembled into the end cover, an inner peripheral portion of the piston cylinder being located on a side of the transmission case at substantially the same position as an outer peripheral portion of the pinion carrier in a radial direction.