| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing device capable of preventing a bearing from being damaged by generation of a negative clearance in starting rotational driving under a low-temperature environment even in a constitution in which an outer ring of a rolling bearing is internally fitted to a bearing housing having a large thermal expansion coefficient.SOLUTION: A rolling bearing 15 has an outer ring 19 internally fitted to a bearing housing 11, a plurality of rolling elements 25, and an annular cage 27 for retaining the plurality of rolling elements 25. A thermal expansion coefficient of the bearing housing 11 is larger than a thermal expansion coefficient of the outer ring 19. A cage 27 is provided with lubricant supply holes 51A, 51B communicating an inner diameter side and an outer diameter side of the annular shape. With respect to the lubricant supply holes 51A, 51B, an axial direction of the lubricant supply holes 51A, 51B at outer diameter-side opening portions 61A, 61B is directed to the bearing housing 11 at an outer side with respect to both end faces 63A, 63B of the outer ring 19.SELECTED DRAWING: Figure 2 |
