TRANSMISSION STRUCTURE FOR SMALL ELECTRIC MOTOR COACH

摘要

PROBLEM TO BE SOLVED: To provide transmission structure for a small electric motor coach simplifying assembly work of an output shaft of an electric motor to a transmission case and suppressing the leakage of oil from the transmission case to the electric motor. SOLUTION: In transmission structure for a small electric motor coach constituted in such a way as to transmit power into a transmission case 9 by an output shaft 10 of an electric motor 3 inserted in a power input opening part 14 in the transmission case 9, a seal member 19 is provided to seal oil between the output shaft 10 and the inner peripheral part of the power input opening part 14, and a tapered boss part 16 with a through hole 17 through which the output shaft 10 is inserted with a micro space is provided in a place more on the inner side of the transmission case 9 than the installed place of the seal member 19 in the power input opening part 14.