PLATE CLUTCH ASSEMBLY HAVING A TORQUE TRANSMITTING MEMBER WITH AN IMPROVED LUBRICATION CONTROLLING DAM STRUCTURE AND METHOD OF MAKING THE SAME

摘要

A sheet metal inner torque transmitting member (38) in or for a multiple plate clutch or brake (28) comprises a corrugated cylinder having external tooth surfaces (58) for mating with one group (48) of the multiple plates (44), and internal trough surfaces (60), with holes (62) therebetween to allow a radially outward flow of coolant or lubricant. At the free end (68) of the trough surfaces (60), a dam structure (64) is provided, by axially upsetting material (at 66) from the end of the trough surfaces (60), so that the external tooth surfaces (58) are not shortened.