LUBRICATING DEVICE FOR ROLLING BEARING

摘要

A lubricating device for a rolling bearing discharges lubricating oil from a lubricating oil introduction member (7) into a rolling bearing (1) to perform lubrication. A circumferential groove (6) is provided in a width surface of an inner ring (2) of the rolling bearing (1). The lubricating oil introduction member (7) has a discharge opening (8) opened to the circumferential groove (6). A slope section (2b) is provided on a large diameter surface of the inner ring (2). The slope section (2b) is larger in diameter on the raceway surface (2a) side of the inner ring (2) and guides lubricating oil in the circumferential groove (6) to the raceway surface (2a) of the inner ring (2) by centrifugal force and surface tension acting on the lubricating oil. On the lubricating oil introduction member (7) is provided a flange-like section (10) that overlaps on the slope section (2b) with a minute gap d in between and restricts the flow rate of the lubricating oil flowing from the minute gap d to the inner ring raceway surface (2a).