To provide a railroad vehicle drive unit reducing a torque loss, and improving a lubricating performance.
The railroad vehicle drive unit 12 is provided with a reduction gear housing 13, an input side rotating member 14, a reduction gear mechanism 15, fixation members 24, 25 which are arranged within the reduction gear housing 13 and are connected and fixed to a vehicle body, and a lubricating oil circulating mechanism which circulates in the drive unit lubricating oil. The lubricating oil circulating mechanism is provided with an axis oil path 14a which extends within the input side rotating member 14 in the axis direction, lubricating oil supply openings 14b-14e which extend from the axis oil path 14a to the outer diameter surface of the input side rotating member 14, a lubricating oil discharge opening 25c which is provided in the fixation member 25, and a circulation oil path 34 which connects the lubricating oil discharge opening 25c and the axis oil path 14a, and recirculates the lubricating oil which has been discharged from the lubricating oil discharge opening 25c, to the axis oil path 14a.
KATAOKA YUKIHIRO
YAMADA MASAHIRO
ADACHI TAKAHISA
Morishita Hachiro
Hiroyuki Yoshida