| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a seal structure capable of securing smooth joint operation by restraining the occurrence of a sucking phenomenon by pressure fluctuation, without making pressure slipped out to the outside a joint, even if the pressure (internal pressure) is generated in the joint by a temperature change. <P>SOLUTION: This seal structure is used for a universal joint having a spider 2, a cup 3 for surrounding the end outer periphery of the spider 2 and a bearing 4 interposed between the spider 2 and the cup 3, and has a seal lip 5. An inside seal 10 such as a lip shape or a projection shape of sealing the internal pressure by being slidably brought into close contact with a peripheral surface 2a of the spider 2 is arranged at a tip of an inward flange 3a in the cup 3. <P>COPYRIGHT: (C)2010,JPO&INPIT |
