Patent ID: 7819587

Claim:
A lubricating device for a rolling bearing comprising: a lubricating oil introduction member for discharging a lubricating oil into the rolling bearing to lubricate the rolling bearing; the rolling bearing including an inner race having a raceway surface, an outer race, and rolling elements interposed between the inner race and the outer race, the inner race having an end face formed with a circumferential groove and also having an outer peripheral surface that has a diameter increasing towards the raceway surface of the inner race to define a slope section; wherein the lubricating oil introduction member has a discharge opening that opens towards the circumferential groove to discharge the lubricating oil into the circumferential groove and the lubricating oil within the circumferential groove is guided on the slope section towards the raceway surface of the inner race by an effect of a surface tension of the lubricating oil and a centrifugal force acting on the lubricating oil; wherein a flange-like section is formed in the lubricating oil introduction member so as to overlay the slope section with a minute gap left between the flange-like section and the slope section for controlling a flow amount of the lubricating oil flowing towards the raceway surface; wherein the lubricating oil introduction member is provided with a lubricating oil discharge passage for discharging to the outside, except for a portion of the lubricating oil discharged from the discharge opening and flowing into the minute gap between the slope section of the inner race and the flange-like section, a remaining portion of the lubricating oil discharged from the discharge opening; wherein the lubricating oil introduction member is a ring-shaped, outer race spacer disposed in contact with an end face of the outer race; and wherein the lubricating oil introduction member includes: an oil discharge passageway defined at a location spaced circumferentially from the discharge opening and extending from an inner peripheral surface to an outer peripheral surface of the lubricating oil introduction member, or a groove-like oil discharge passageway that is defined in a surface thereof held in contact with the end face of the outer race so as to extend radially of the lubricating oil introduction member.