US 12,222,007 B2
Bearing unit with sensorized shield
Andrea A. Bertolini, Carrara (IT); Fausto Baracca, Massa (IT); Fabio Cavacece, Rome (IT); Pasquale Frezza, Aversa (IT); and Alessio Nebbia Colomba, Pisa (IT)
Assigned to AKTIEBOLAGET SKF, (SE)
Filed by AKTIEBOLAGET SKF, Gothenburg (SE)
Filed on Nov. 17, 2022, as Appl. No. 17/988,905.
Claims priority of application No. 102021000029612 (IT), filed on Nov. 24, 2021.
Prior Publication US 2023/0160422 A1, May 25, 2023
Int. Cl. F16C 33/78 (2006.01); F16C 19/06 (2006.01)
CPC F16C 33/7846 (2013.01) [F16C 19/06 (2013.01); F16C 2233/00 (2013.01); F16C 2240/60 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A bearing unit for a marble cutting machine, comprising:
a radially outer ring comprising a radially outer flange portion, wherein the radially outer ring is rotatable with respect to an axis of rotation (X);
a radially inner ring comprising a through hole and an axial thickness, wherein a ratio between a dimension of an internal diameter (D) of the through hole and a dimension of the axial thickness (T) of the radially inner ring is between 6.7 and 11.1, wherein the radially inner ring is stationary;
a row of rolling bodies interposed between the radially outer ring and the radially inner ring;
a sealing shield interposed between the radially inner ring and the radially outer ring, wherein the sealing shield is fixed to the radially outer ring and rotatable with respect to the rotation axis (X), wherein the sealing shield comprises:
a radially internal cylindrical portion defining a labyrinth seal with the radially inner ring;
a radially external flange portion configured to be inserted on a surface of the radially outer ring;
an annular central portion comprising an axially inner annular edge facing the row of rolling bodies; and
a connection portion of frusto-conical shape configured to connect the flange portion to the annular central portion,
wherein each of the radially internal cylindrical portion, the radially external flange portion, the connection portion, and the annular central portion comprising the axially inner annular edge comprise a composite material; and
a sensor molded in the annular central portion axially outer to the axially inner annular edge.