Patent ID: 7883271
Filing Date: 2011-02-08
Classification: F16C

Abstract:
1. A rolling bearing device comprising: a rolling bearing comprising an inner ring, an outer ring, a plurality of rolling elements which is rollably disposed between the inner ring and the outer ring, and an annular cage for holding the plurality of rolling elements at predetermined intervals in a circumferential direction; a nozzle which communicates with a tank for storing lubricating oil and is inserted between an inner circumferential surface of the cage and the inner ring and made to open; and a pump which supplies the lubricating oil stored within the tank into the rolling bearing via the nozzle, wherein the inner circumferential surface of the cage is formed such that an inside diameter of the cage is gradually reduced in a continuous or intermittent fashion from an axial center portion side towards an end surface portion on a side where the nozzle is inserted, wherein the inner ring includes a concave portion disposed axially adjacent to a raceway surface of the inner ring, the concave portion including: wherein a distal-end opening of the nozzle radially overlaps with the diameter decreasing part.