| 摘要 |
PURPOSE:To reduce the frictional resistance to improve the durability and eliminate generation of rotational sounds by forming a spiral groove only one end of which is opened, to a bearing end surface inversely to the rotating direction of the shaft. CONSTITUTION:A spiral groove 10 formed on an inner peripheral surface 12 of an oil containing bearing 11 is opened on an end surface 14 of one end of the bearing 11, and the turning direction of the groove 13 is made inverse to the rotating direction of the bearing 11, thus moving aged oil contents and the like to discharge the same out of the opened end. Accordingly, when the bearing 11 rotates in the direction shown by an arrow A with respect to a shaft 15, the contact portion of the bearing 11 and the shaft 15 moves from a point (c) to (d), and the relationship between the groove 13 and junctions (a) and (b) of the contact parts (c) and (d) is so set that the junction (b) is not set frontwardly of the junction (a) in the rotation. |
