| 摘要 |
PURPOSE:To improve life of an oil seal by holding cooling and lubrication oil in a space part formed to a speed reducer side rather than the oil seal between a partition member and a rotational shaft and forming an oil film between the oil seal and a collar fit to the rotary shaft and cooling both of the oil seal and the collar by the oil film. CONSTITUTION:A space part 22 is formed at a reduction device side 2 rather than an oil seal 19 between a partition member 3 and a rotary shaft 4. Cooling and lubricating oil 21 is held in this space part, 21. An oil film is formed by this cooling and lubricating oil 21 between the oil seal 19 and a collar fit to the rotary shaft 4 and the oil seal 19 and the collar 20 are cooled. Lubricating function of the oil seal 19 with the collar 20 can be kept agreeably by the cooling and lubricating oil 21. The cooling and lubricating oil 21 has higher viscosity than lube oil and thereby, if lube oil 21 is lubricated in a position corresponding to the space part, 22 of the collar 20, assembling work of parts can be performed smoothly. Thereby, heat by rotation of the collar 20 is cooled and lubricated by the oil film of the cooling and lubricating oil 21. Accordingly, deterioration of the oil seal 19 can be prevented. |
