US 12,404,899 B2
Bearing unit with rolling bodies
Fausto Baracca, Massa (IT); Andrea A. Bertolini, Carrara (IT); and Fabio Cavacece, Rome (IT)
Assigned to Aktiebolaget SKF, Gothenburg (SE)
Filed by AKTIEBOLAGET SKF, Götenborg (SE)
Filed on Jul. 7, 2023, as Appl. No. 18/219,133.
Claims priority of application No. 102022000014851 (IT), filed on Jul. 15, 2022.
Prior Publication US 2024/0019001 A1, Jan. 18, 2024
Int. Cl. F16C 33/78 (2006.01); F16C 19/06 (2006.01)
CPC F16C 33/783 (2013.01) [F16C 19/06 (2013.01); F16C 33/782 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A bearing unit comprising:
a radially outer ring comprising:
at least one seat formed in a radially inner surface of the outer ring; and
at least one cylindrical surface of the radially inner surface, each cylindrical surface being adjacent to a corresponding seat;
a radially inner ring;
a row of rolling bodies interposed between the radially outer ring and the radially inner ring;
at least one sealing device interposed between the radially inner ring and the radially outer ring and comprising:
a shaped shield comprising a metallic material;
an elastomer coating overmolded on the shaped shield; and
an anchorage formed on the elastomer coating and comprising:
a radially external anchoring lip received by the seat of the radially outer ring and comprising:
a root portion; and
a projection distal to the root portion and comprising a flexibility and a thickness that is less than a flexibility and a thickness of the root portion;
an annular cavity formed on a radially internal side of the anchoring lip, and
a cylindrical portion comprising a radially external cylindrical surface, the cylindrical portion being axially spaced apart from the anchoring lip, the radially external cylindrical surface cooperating with a corresponding radially internal cylindrical surface of the at least one radially internal cylindrical surface of the radially outer ring;
wherein an axial length of the annular cavity is greater than an axial length of the projection,
the anchoring lip is flexed radially inward and at least partially fills the annular cavity.
 
13. A sealing device for a bearing unit comprising:
a shaped shield comprising a metallic material;
an elastomer coating overmolded on the shaped shield; and
an anchorage formed on the elastomer coating and comprising:
a radially outer anchoring lip configured to be received by a seat of a radially outer ring and comprising:
a root portion; and
a projection distal to the root portion and comprising a flexibility and a thickness that is less than a flexibility and a thickness of the root portion;
an annular cavity formed on a radially inner side of the anchoring lip, and
a cylindrical portion comprising a radially outer cylindrical surface, the cylindrical portion being axially spaced apart from the anchoring lip, the radially outer cylindrical surface being configured to cooperate with a corresponding radially internal cylindrical surface of the radially outer ring;
wherein an axial length of the annular cavity is greater than an axial length of the projection, and
the anchoring lip is configured to deform and bend in a radially inward direction to at least partially fill the annular cavity when assembled in the bearing unit.