| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal structure of a turning bearing capable of reducing seal torque, by preventing reversal of a lip part of a seal member and falling-off of the seal member, when internal pressure increases, and the turning bearing.SOLUTION: An annular groove is arranged on a peripheral surface of a projecting side bearing ring, a fixing groove 13 is arranged on an outside surface in the axial direction on a bottom part of this annular groove, a base part 6 of a seal member 5 has a fitting-in groove for fitting an annular wall part 14 being a part between the peripheral surface of the projecting side bearing ring and an inner surface of the fixing groove 13. A seal fixing side inclined part inclined so as to be positioned on the side for going away from a bearing space as proceeding to a groove bottom side part, is arranged on a groove side surface on the bearing space side in the inner surface of the fixing groove 13. In the base part 6 of the seal member 5, a cross-sectional shape of a base part inside surface 6a facing to the bottom part of the annular groove of the projecting side bearing ring, is formed in a shape of being connected by one convex curve or a continuous convex curve having no inflection point. |
