| 摘要 |
PROBLEM TO BE SOLVED: To prevent the degradation of lubricating oil due to lead-in of moisture caused by negative pressure in bearing space in a capped rolling bearing so as to prevent a lowering of bearing performance early damage and early separation. SOLUTION: Bearing space S formed between outer rings 11, 11, 12 and inner rings 13, 13 so as to arrange rollers 15 therein are sealed with sealing members 20, 20 supported by lateral seal holders 17, 17. Each sealing member 20 is supported movably in an axial (lateral) direction by the sliding face of the seal holder 17. When internal pressure Ps in the bearing space S becomes lower than external pressure (atmospheric pressure) Po due to temperature change and pressure difference becomes large, the sealing member 20 moves parallel to the inside, and internal pressure Ps is heightened by that portion so as to reduce pressure difference. Lead-in of moisture caused by negative pressure in the bearing space S is therefore prevented. |
