| 摘要 |
Sealing a runner rolling bearing comprising three sealing stages of which the first stage is a cover pressed into the runner hub joined with a ring cover seated on its axis, the second stage is a sealing packet clenched between the first stage and the rolling bearing being sealed, and the third stage is a NILOS-type bearing gasket clenched between the backing wall of the hub body and the front surface of the rolling bearing, characterized in that the second-stage sealing packet constitutes an inseparable subassembly comprising an external sleeve (7), seated in the hub (2), which sleeve (7) has an internal ring protrusion (8) inside, and an internal sleeve (9) seated on the runner axis (4), whereas in the external sleeve (7), on both sides of its internal ring protrusion (8), there are headed bushes (10 and 11), whose flanges adjoin the internal ring protrusion (8) and constitute external disk partitions between which internal disk partitions (12 and 13) are situated, which are joined with sleeves (14 and 15) affiliated with the partitions (12 and 13), which sleeves (14 and 15) are seated on the internal sleeve (9), and moreover in the ring spaces between the headed bushes (10 and 11) and corresponding sleeves (14 and 15) affiliated with the internal disk partitions (12 and 13) there are flexible contact sealing rings (16) whose lips adjoin the sleeves (14 and 15).<IMAGE>
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