| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sealed coupling eliminating apprehension of coming off of a plug unit sealing lubricating oil even by increasing the internal pressure of a casing. SOLUTION: In this sealed coupling, internally mounting a power transmitting mechanism to seal lubricating oil, it is characterized by arranging a supply/ discharge oil port 17 provided in a casing 1 to be blocked by a plug unit 18 in a position where the above plug unit 18 interferes with a sealed coupling mounting part 5 (flange 19) when this sealed coupling is mounted in a car body, the plug unit 18 press fitted to the supply/discharge oil port 17 is blocked by interference with the mounting part 5 naturally used in the case that the sealed coupling is mounted in the car body, consequently even without setting up a particular coming-off preventing member, coming-off due to looseness of the plug unit 18 caused by a difference of coefficient of thermal expansion between the casing 1 and the plug unit 18 by increasing a temperature of the power transmitting mechanism internally mounted in the sealed coupling and lubricating oil and coming-off of the plug unit 18 due to a rise of internal pressure of the casing 1 are effectively prevented.</p> |
