Patent ID: 6328478
Filing Date: 2001-12-11
Classification: F16C

Abstract:
A rolling bearing for a bearing unit which is adapted to be forcibly lubricated with a pressurized lubrication oil, the rolling bearing comprising:a fixed outer ring;an inner ring having first and second opposite end faces and rotatable about a center axis of the bearing;a plurality of rolling elements interposed between the outer ring and the inner ring;an annular groove formed in the first end face of the inner ring for retaining therein the pressurized lubricating oil; anda plurality of oil supply channels formed in the inner ring for supplying the lubrication oil toward the rolling elements from the annular groove,wherein the oil supply channels each have an inlet port communicating with the annular groove and an outlet port to be opposed to the rolling elements,wherein the outlet ports of the oil supply channels are located in a recess formed in an outer circumference of the inner ring in a circumferentially equidistantly spaced relation,wherein a space is defined between the recess and the rolling elements for releasing the lubrication oil when the rolling elements pass over the recess, wherein the outer circumference of the inner ring has a circumferential groove of a V-shaped cross section formed circumferentially thereof and defined by first and second inclined surfaces, and the first inclined surface includes the recess.