ROLLING BEARING UNIT WITH COMBINATION SEAL RING
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United States of America Patent
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Issued Date -
Mar 31, 2016
app pub date -
May 14, 2014
filing date -
May 15, 2013
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Abstract
A roller bearing unit with a combination seal ring. Between the outer peripheral edge of a rotation side circular ring part constituting a slinger and the inner peripheral surface of the stationary side cylindrical part of a metal insert constituting the seal ring, there is formed a labyrinth seal. Also, in such part of an elastic member constituting the slinger as intervenes between the labyrinth seal and seal lip serving as a side lip, there is formed an auxiliary seal lip having lower rigidity than the seal lip. The whole axial length of the auxiliary seal lip in its free state is set in the range of 5.5˜7.5 times the thickness dimension thereof and the ratio of interference is set in the range of 0˜20% of the whole axial length of the free-state thereof.
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