Patent ID: 8100806

Claim:
A travel assembly provided with a travel motor, a planetary speed reduction mechanism for transmitting rotation of said travel motor at a lower rotational speed, a spindle forming an axle, and a wheel supported on said spindle via a tapered roller bearing and rotatable by said planetary speed reduction mechanism, said planetary speed reduction mechanism comprising a sun gear rotatable by rotation of a shaft of said travel motor, planet gears for rotating said wheel in response to rotation of said sun gear, and a carrier for holding said planet gears, wherein: said travel assembly is provided with a spline connection connecting said spindle and said carrier with each other and an oil passage for guiding internal lube oil of said planetary speed reduction mechanism to said spline connection, said travel assembly is further provided with a retainer, which is in contact with an end face of said spindle and said carrier and presses said tapered roller bearing, said retainer is provided with said oil passage and a guide portion for guiding the internal lube oil of said planetary speed reduction mechanism to said oil passage, wherein said oil passage comprises a groove and wherein said guide portion is an inclined surface of the retainer for guiding agitated and splashed lube oil into the groove.