| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oil seal and a sealing structure for surely restraining a squeak sound. <P>SOLUTION: A surface property is expressed in the relationship between a wave length and amplitude provided by performing Fourier transform on a cross-sectional curve of a sliding contact surface of a seal lip, and the amplitude of a wave length 30 μm component is set to 0.3 μm or more, and is desirably set to 0.5 μm or more. A deep recess (a high projection) is imparted to the sliding contact surface, to reduce a true contact part to a mating part (a sliding object surface). A degree that a friction coefficient depends on a sliding speed is reduced, to restrain generation of the squeak sound. Amplitude of a wave length 120 μm component is set to 2.5 μm or less, and is desirably set to 2 μm or less, to secure required sealability. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
