| 摘要 |
To improve sealing performance, a sealing device comprises an oil seal (10) mounted to a non-rotating housing (2), and a dust cover (20) mounted to a rotating body (5) outside the oil seal (10), one of the oil seal (10) and the dust cover (20) facing each other has an external seal lip (24) slidably in close contact with the other of them (10, 20) outside the slide sections (S1, S2) between the oil seal (10) and the rotating body (5), the oil seal (10) and the dust cover (20) have non-contact lips (16, 25) which are positioned outside the slide sections (S1, S2) and inside the external seal lip (24), have substantially conical tubular shapes becoming larger in diameter toward the tips thereof, and are loosely inserted to each other, and a labyrinth seal (30) is provided at the outer diameter side of the external seal lip (24).
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