US 12,140,186 B2
Bearing unit with protection disc
Andrea A. Bertolini, Carrara (IT); Fausto Baracca, Massa (IT); and Pasquale Frezza, Aversa (IT)
Assigned to AKTIEBOLAGET SKF, (SE)
Filed by AKTIEBOLAGET SKF, Gothenburg (SE)
Filed on Sep. 6, 2022, as Appl. No. 17/903,544.
Claims priority of application No. 102021000022952 (IT), filed on Sep. 7, 2021.
Prior Publication US 2023/0072450 A1, Mar. 9, 2023
Int. Cl. F16C 19/06 (2006.01); F16C 23/08 (2006.01); F16C 33/78 (2006.01); F16C 33/80 (2006.01)
CPC F16C 33/782 (2013.01) [F16C 19/06 (2013.01); F16C 23/084 (2013.01); F16C 33/785 (2013.01); F16C 33/7886 (2013.01); F16C 33/805 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A bearing unit, comprising:
a radially outer ring configured to be stationary during use of the bearing unit;
a radially inner ring configured to rotate during use of the bearing unit with respect to a rotation axis (X), the radially inner ring configured to be fixed to a rotating shaft for rotation therewith;
a row of rolling bodies interposed between the radially outer ring and the radially inner ring;
a casing for housing the radially outer ring and the radially inner ring;
a sealing device;
a protection element configured for protecting the sealing device, the protection element comprising a one piece construction comprising a plastic or composite material, the protection element disposed axially external with respect to the sealing device in a seat of the casing, the protection element defining a radial distance (d2) between a radially internal surface of the protection element and the radially inner ring ranging between about 0.75 mm and about 0.95 mm such that the protection element is configured to block external contaminants without making contact with the radially inner ring;
wherein the protection element comprises a radially internal tapered portion, with a thickness decreasing in a radially internal direction.