US 11,808,298 B2
Bearing unit with optimized anchoring of the sealing device
Andrea A. Bertolini, Carrara (IT); Fausto Baracca, Massa (IT); Fabio Cavacece, Rome (IT); and Pasquale Frezza, Aversa (IT)
Assigned to AKTIEBOLAGET SKF
Filed by AKTIEBOLAGET SKF, Gothenburg (SE)
Filed on Jun. 21, 2022, as Appl. No. 17/845,300.
Claims priority of application No. 102021000017093 (IT), filed on Jun. 30, 2021.
Prior Publication US 2023/0003258 A1, Jan. 5, 2023
Int. Cl. F16C 33/78 (2006.01)
CPC F16C 33/785 (2013.01) [F16C 33/783 (2013.01); F16C 33/7846 (2013.01); F16C 2226/74 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A bearing unit, comprising:
a radially outer ring rotatable with respect to an axis of rotation (X);
a stationary radially inner ring;
a row of rolling elements interposed between the radially outer ring and the radially inner ring;
a shaped sealing screen interposed between the radially inner ring and the radially outer ring and inserted in a first seat of the radially outer ring; and
a snap ring inserted in a second seat of the radially outer ring and configured to interact with the shaped sealing screen to lock the shaped sealing screen in the first seat,
wherein,
the second seat is axially defined at least in part by a first annular surface configured to cooperate with the snap ring and cause the snap ring to push axially against the shaped sealing screen,
the shaped sealing screen comprises an axial thickness (Ss) greater than the axial depth (Pa) of the first seat by an axial length (L0),
the shaped screen axially occupies part of a radially inner inlet of the second seat, and
the second seat comprises a radial depth (Ps) of at least 70% of a radial length (Lf) of an edge of the snap ring.