| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the seal property of a lip part by suppressing the occurrence of oil sludge by suppressing temperature elevation of lubricating oil around the lip part. <P>SOLUTION: A rolling bearing includes: a ring-shaped outer ring 21; an inner ring 22 disposed at an inner peripheral side of the outer ring 21; and a rolling body 24 which rolls between the outer ring 21 and the inner ring 22. In a rotary shaft device, the outer ring 21 is fitted and fixed to a housing 11, the inner ring 22 is fitted to a rotary shaft, an oil seal 60 is mounted to the inner periphery of the outer ring 21, and a lip part 64 at an inner peripheral side of the oil seal 60 is brought into slide-contact with the inner ring 22. An annular groove is formed for storing lubricating oil in the outer circumference of the inner ring 22 between the rolling body 24 and the oil seal 60, and the annular groove has a slope 22e whose depth becomes shallower gradually toward the rolling body 24. <P>COPYRIGHT: (C)2013,JPO&INPIT |
