| 摘要 |
A seal mechanism (1) that is provided with an annular resin seal lip (2) which is disposed coaxially with a shaft (S) and is brought into contact with a circumferential surface of the shaft. The seal mechanism is provided with a stopper (3) that is provided in a metallic housing (H) surrounding the shaft and is disposed between the shaft and a portion of the seal lip other than the edge portion coming into direct contact with the shaft while spaced apart from the circumferential surface of the shaft. The stopper is made of a material having a thermal expansion coefficient smaller than that of a material of which the seal lip is formed, and an axis of the seal lip is caused to correspond to an axis (LS) of the shaft by coming into contact with the seal lip which is reduced in diameter at the time of cooling. |
