| 摘要 |
PURPOSE:To eliminate oil lack even in use for a long period by sealing a bearing from atmospheric air, thereby preventing the deterioration of lubricating oil. CONSTITUTION:A cylindrical bottom plate 8b is press-fitted of clamped to the lower end of a cylindrical housing 8 to become a bearing, and a steel ball 1b at the lower end of a rotational shaft 1 becomes a thrust bearing. The first and second slide shaft bearing members 15a, 15b are formed of oil-immersed bearings or plastic bearings which include Teflon, and press-fitted from above and below to the inner surface of the housing 8. A ring-shaped bearing 18 is movably engaged with the shaft 1 at the intermediate position of the members 15a, 15b. The bearing 18 is rightwardly pressed by a leaf spring 19a. Lubricating oil such as grease is filled in the space of the dotted part 23. |
