| 摘要 |
An object of the present invention is to make improvement on the shape of a bag 46a which provides the lubrication oil tank 46, so as to eliminate the need for an arc-shaped metal mold tailored to bearing size, and to allow effective use of a space for housing the lubrication oil tank in an annular housing even if a spacer has a large width. A rolling bearing device 10 is a combination of a rolling bearing 11 and an oil supply unit 13 which includes at least: a lubrication oil tank 46 having a lubrication oil discharge port. The oil supply unit 13 is in a housing space inside a spacer 16 adjacent to the rolling bearing 11, and the housing space is between an inner ring 17 and an outer ring 18. The housing space for the lubrication oil tank has a width approximately equal to an axial width of the spacer and a circumferential length within a range of a center angle ¸ in an axial view of the spacer 16; and the lubrication oil tank 46 housed in the housing space is provided by a bag 46a which has a width approximately equal to an axial width of the housing space and a length approximately equal to A×À×(¸/360), where A represents a center diameter of the spacer. |
