| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure capable of preventing base oil separated from a thickener in base oil in grease from leaking to an outer space through a combined seal ring 9b even when a central shaft of a rolling bearing unit 1a is arranged toward a vertical direction. <P>SOLUTION: There is provided a seal lip 25 for oil sump, protruded toward the side of an inner space mounted with a rolling element, on a part of a seal material 13a constituting the combined seal ring 9b to form a storage space 29 on the outer diameter side of the seal lip 25 for oil sump. Also, the amount of protrusion in the shaft direction of the seal lip 25 for oil sump is regulated to an extent for preventing the base oil from overflowing from the storage space 29 even when moving the base oil separated from the thickener into the storage space 29 by arranging the central shaft of the rolling bearing unit 1a toward the vertical direction. Thereby, the base oil can be effectively prevented from leaking or overflowing from the storage space 29. <P>COPYRIGHT: (C)2013,JPO&INPIT |
