| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oil seal structure which is unlikely to transfer flaw of an inner tube, to prevent oil leakage, to reduce the size of an installation space of the oil seal structure in an outer tube and to reduce manhours to assemble the oil seal structure to the outer tube. <P>SOLUTION: In the oil seal structure of the hydraulic shock absorber 10, an inner seal 80 is assembled between both ring-shape protruding parts 73, 74 of an outer seal 70 in a manner displaceable in an axial direction and a circumference direction. By displacement of the inner seal 80 in its axial direction accompanying movement of the outer tube 11 and the inner tube 12, a rotation means 90 intermittently rotates the inner seal 80 in one circumference direction by an impact force every time at least one outside surface 85 in the axial direction of the inner seal 80 collides to an inside surface 75 of the ring-shape protruding part 73 of the outer seal 70 facing against the outside surface 85 of the inner seal 80. <P>COPYRIGHT: (C)2007,JPO&INPIT |
