| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing device which suppresses the intrusion of foreign matters into the bearing and the leakage of a lubricant to the outside, and can prevent a malfunction of a bearing part caused by a lubrication failure.SOLUTION: A rolling bearing device 1 has an outer ring member 20 in which an outer raceway 21 is formed at an internal periphery, an inner ring member 30 in which an inner ring raceway 31 is formed at an external periphery, and rolling bodies 40 which roll between the outer ring raceway 21 and the inner ring raceway 31. A lubricant 80 is sealed into a bearing internal space 70, and the inner ring member 30 rotates in one direction. A labyrinth-shaped clearance 60 is formed between a sealed external peripheral face 34 which is formed outside the bearing in an axial line direction rather than the inner ring raceway 31 of the external periphery of the inner ring member 30, and a sealed internal peripheral face 25 which is formed outside the bearing in the axial line direction rather than the outer ring raceway 21 of the internal periphery of the outer ring member 20, a spiral groove 38 which generates a flow of air to the outside direction, and is twisted to an axial line is formed at the sealed external peripheral face 34, and an air flow-in hole 28 which communicates to a cleaning external space 4 from the sealed internal peripheral face 25 is formed. |
