US 12,117,045 B2
Sealed rolling bearing
Hayato Kawaguchi, Shizuoka (JP); and Takahiro Wakuda, Shizuoka (JP)
Assigned to NTN CORPORATION, Osaka (JP)
Appl. No. 17/912,360
Filed by NTN CORPORATION, Osaka (JP)
PCT Filed Mar. 19, 2021, PCT No. PCT/JP2021/011340
§ 371(c)(1), (2) Date Sep. 16, 2022,
PCT Pub. No. WO2021/193419, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-052562 (JP), filed on Mar. 24, 2020.
Prior Publication US 2023/0137648 A1, May 4, 2023
Int. Cl. F16C 33/78 (2006.01); F16C 19/06 (2006.01); F16C 33/80 (2006.01)
CPC F16C 33/782 (2013.01) [F16C 19/06 (2013.01); F16C 33/7823 (2013.01); F16C 33/805 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A sealed rolling bearing comprising:
two seal members disposed between an inner ring and an outer ring, each of the two seal members being located on a respective side of a rolling element installation area of the bearing, se as to seal the rolling element installation area, and
two slingers each disposed outside of a respective one of the two seal members, and sized to lie within a width range of the bearing, the two slingers being supported by the inner ring, and configured to prevent external splashed muddy water from entering the bearing,
wherein each of the two slingers includes:
a radially inner bent portion formed by axially inwardly bending a radially inner side of the slinger, the radially inner bent portion being press-fitted to an outer periphery of the inner ring; and
a radially outer bent portion formed by axially inwardly bending a radially outer side of the slinger such that a first labyrinth portion is defined between the radially outer bent portion and a radially inner surface of the outer ring, the first labyrinth portion having a path length, in an axial direction of the bearing, longer than a material thickness of the slinger,
wherein each of the two seal members is a rubber seal reinforced by a metal core, each of the two seal members having a side lip on an axially outer side surface of the rubber seal and protruding in the axial direction of the bearing, the side lip having a distal end located radially inwardly of the radially outer bent portion of a respective one of the two slingers such that a second labyrinth portion is defined between the side lip and an axially inner side surface of a body of the respective one of the two slingers,
wherein the side lip of each of the two seal members has a radially outer surface and a radially inner surface inclined in opposite directions to each other relative to respective reference lines parallel to a center axis of the bearing so as to be tapered toward the distal end of the at least one side lip, the radially outer surface of the side lip of each of the two seal members having an inclination angle smaller than an inclination angle of the radially inner surface of the side lip of each of the two seal members.