| 摘要 |
<p>An apparatus with a seal is realized that does not trap foreign material when a secondary oil seal is utilized. The apparatus with a seal comprises a first member and a second member that rotate relative to one another. The second member passes through a circular hole formed in the first member. The apparatus with a seal further comprises: a lubricant-sealing main oil seal inserted between the second member and an inner circumferential surface of the circular hole of the first member, a secondary oil seal movable along a center line of the circular hole of the first member and positioned on an opposite side of the lubricant, the main oil seal being interposed therebetween, and a dust seal positioned on an opposite side of the lubricant, the secondary oil seal being interposed therebetween. A groove that encircles in a circumferential direction is formed on one of the inner circumferential surface of the circular hole and an outer circumferential surface of the second member, and the groove is positioned on an opposite side of the lubricant, the main oil seal being interposed therebetween. The secondary oil seal 24 is movable from a reserve position, which opposes the groove, to a sealing position, which does not oppose the groove.</p> |
