| 摘要 |
PURPOSE:To prevent an output shaft from seizing to a bearing by picking up lubricating oil via an irregular surface formed on the outer periphery of an output shaft gear and supplying it to the bearing. CONSTITUTION:Many radial recesses 15 are circumferentially distributed and formed on the outer periphery of the side opposed to the bearing 13 of an output shaft gear 11. When the gear 11 is rotated, a large quantity of lubricating oil 14 adhered to the gear 11 via the recesses 15 is carried upward upon rotating of the gear 11, arrived at a gap 16 between the gear 11 and the end face of the bearing 13 by gravity, and intaken to a gap 17 between an output shaft 10 and the bearing 13 by a capillary tube phenomenon. |
