| 摘要 |
<p>A sealing device (1) having an oil seal (10), a dust seal (20), and a backup ring (30) that are separate members from each other. In the process of installing the device into a unit, the device can be reliably assembled into the unit with the members (10-30) fixed to each other. To achieve this, the sealing device has the oil seal (10) whose main lip (12) is integrally provided at the inner circumference of a first metal ring (11) fixed by staking to the inner circumference of a cylinder (3); the dust seal (20) whose dust lip (22) is integrally provided at the inner circumference of a second metal ring (21), an outer peripheral end (21a) of the second metal ring (21) being fitted in an outer circumferential tubular section (11b) of the first metal ring (11); and the backup ring (30) fitted in the back side of the main lip (12). Further, a slope (21b) having a smaller diameter on the atmosphere (B) side is formed at the outer circumferential end (21a) of the second metal ring (21). The tip (11c) of an outer circumferential tubular section (11b) of the first metal ring (11) is staked together with a to-be-staked section (3b) of the cylinder (3) and fitted on the slope (21b).</p> |
