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