| 摘要 |
PROBLEM TO BE SOLVED: To provide a rolling bearing with a seal with a simple structure, which is capable of maintaining a normal seal pressure against an inner race of a seal lip even when a large negative pressure or a positive pressure acts on the seal lip, thus preventing leakage of grease inside the bearing.SOLUTION: In a rolling bearing with a seal, an annular lip supporting portion 42 having a larger thickness than that of a seal lip 43 is formed on an inner periphery side of a seal member 34, the seal lip (43) protruding on an inner peripheral surface of the lip supporting portion 42 includes a cylindrical seal surface (43a) being in close contact with an outer peripheral surface of an inner race (30); and an inner side surface (43b) at least part of which in a region from an inner end of the seal surface (43a) to reach the lip supporting portion (42) stands upright from the inner end of the seal surface (43a) in a direction perpendicular to a generating line of the outer peripheral surface of the inner race (30); and a width of the seal surface (43a) in an axial direction is set to be larger than a height of the seal lip 43 in a radial direction. |
