| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing structure capable of further improving the life of an oil seal than conventional one.SOLUTION: In the bearing structure, a hub 2 is externally fitted and mounted onto a shaft part 4 protruded on the end of an axle 1 via a unit bearing 3 in a rotatable manner, a driving shaft 13 is inserted into the axle 1 through the side of the shaft part 4, and a flange portion 13a on the anti-insertion side thereof is fastened to the hub 2 so that the hub 2 can be driven to be rotated via the driving shaft 13. In a space held between the unit bearing 3 and the flange portion 13a inside the hub 2, a lubricant retaining wall 16 is provided which is fitted to the whole inner peripheral face of the hub 2 with its wall surface directed to the radial inside. Oil 17 (lubricant: grease applicable) is previously filled between the lubricant retaining wall 16 and the unit bearing 3 so as to be supplied to the sliding face of the oil seal 8 on the unit bearing 3 at all times. |
