STEPPED AUTOMATIC TRANSMISSION, AND POWER UNIT AND VEHICLE WITH THE SAME

摘要

A stepped automatic transmission that has a simple structure, in which oil is effectively supplied to each rotating shaft, and that requires less oil. An output shaft (33) is placed behind an input shaft (52). A first intermediate shaft (181) and second intermediate shafts (182-184) are arranged in a power transmission route between the input shaft (52) and the output shaft (33). An oil sump (99) is formed at the bottom of a casing (211). Oil chambers (133, 137) to which oil is supplied and one or more through holes (66a, 70a) are formed in the first intermediate shaft (181). The through holes (66a, 70a) are connected to the oil chambers (133, 137).