| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricating structure of a bearing device capable of excellently lubricating rolling bearings, and efficiently cooling inner rings and an inner ring spacer of the rolling bearings, and a main shaft fitted to their inner peripheries.SOLUTION: In a bearing device, an outer ring spacer 4 and an inner ring spacer are respectively disposed between outer rings and between inner rings 3 of a plurality of rolling bearings arranged in the axial direction, the outer rings and the outer ring spacer 4 are disposed in a housing, and the inner rings 3 and the inner ring spacer are fitted to a main shaft. A nozzle 12 is disposed on the outer ring spacer 4 for spraying a mixture of air and oil, or a lubrication fluid composed of only the oil, to outer peripheral faces of the inner rings 3 or the inner ring spacer to supply the same to the rolling bearings. The nozzle 12 is inclined forward in the rotating direction of the main shaft at their discharge port side. |
