| 主权项 |
1. A seal mechanism that is provided with an annular resin seal lip which is disposed coaxially with a shaft and is brought into contact with a circumferential surface of the shaft, the seal mechanism comprising:
a stopper that is provided in a metallic housing 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, wherein 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 of the shaft by bringing the stopper into contact with the seal lip which is reduced in diameter at the time of cooling. |
