Cooling structure of automatic transmission

Abstract

A cooling structure of an automatic transmission is provided which is capable of reducing the number of assembly parts and obtaining a high cooling efficiency by placing two heat sources away from each other. A high clutch device (15) is disposed between a front planetary gear device (13) and a rear planetary gear device (14) which is parallelly disposed in the direction in which an input shaft (4) in the front planetary gear device (13) extends. The high clutch device (15) includes a cylindrical clutch drum (15a), a clutch piston (15b) which slides in the direction of the input shaft (4) inside of the clutch drum portion (15a) and forms a piston-operating oil hydraulic chamber (20) in combination with the clutch drum portion (15a), and a plurality of clutch plates (15c) which are pressed by the clutch piston (15b) and laminated in the direction in which the input shaft (4) extends. The clutch drum (15a) is formed intetrally with a planetary carrier (18).

Dependencies are inferred from the claim text.