Wenderoth, Lind & Ponack, L.L.P.
Rolling bearing and a travel unit including rolling bearings
A rolling bearing includes rolling elements incorporated between an outer race and an inner race, a resin seal ring covering the opening of at least one end of the bearing space, and a filter covering an oil hole formed in the seal ring for capturing foreign matter contained in lubricating oil. The filter and the resin seal ring are integrated by insert molding. The filter and the seal ring are made of the same material. An annular lip portion, which is separate from the seal ring, is in contact with the outer race. An engaged portion provided on the radially inner side of the seal ring is engaged in a recess formed in the inner race such that, during thermal expansion of the seal ring, the engaged portion is engaged such that the seal ring is movable in the radial direction relative to the inner race.
NTN CORPORATION
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Takashi Hiroyuki Naota Kiyoshige Katsunori Hiroyoshi
Ito Miyazaki Yamamoto Yamauchi Sone Ito