Patent ID: 8646577

Claim:
A travel assembly comprising: a cylindrical spindle that is fixed on a body of a working vehicle; a rotary shaft that extends in an axial direction through the cylindrical spindle, the rotary shaft being rotationally drivable by a driving source; a rim rotatably arranged on a side of an outer periphery of the cylindrical spindle to permit mounting of a wheel thereon; a planetary gear reduction mechanism configured to transmit rotation of the rotary shaft to the rim at a reduced speed; a sleeve integrally fitted on the shaft; a bearing rotatably supporting the rotary shaft via the sleeve, the sleeve being configured to extend in an axial direction over a radially inner side of the bearing; a retainer holding the bearing in place, the retainer being configured to extend in an axial direction over a radially outer side of the bearing; and a lube oil pipe configured to feed lube oil to the rotary shaft, the lube oil pipe being held in place by the retainer, wherein the lube oil pipe branches within the retainer to form an oil passage, the oil passage has an opening through which the lube oil is feedable to rolling elements in the bearing, the retainer and sleeve form flange portions, respectively, the flange portions being configured to extend radially from the respective retainer and sleeve toward one another in order to axially shield rolling elements in the bearing, the flange portions of the retainer and sleeve being provided on a side of the driving source, and the oil passage has, on a side of the rolling elements in the bearing, the opening in the flange portion arranged on the retainer.