Patent ID: 11953058
Assignee: AKTIEBOLAGET SKF
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. A sealing device for a bearing unit, the bearing unit comprising a radially outer ring and a radially inner ring, the sealing device comprising:
a first metallic, annular screen comprising a first mounting area, the first mounting area configured to contact by interference the radially inner ring in an assembled configuration, wherein the first annular screen comprises:
an inclined connection portion configured to be inclined axially with respect to an axis of rotation of the bearing unit in an assembled configuration; and

a first flange portion extending radially from the inclined connection portion;
a second metallic, stationary annular screen comprising a second mounting area, the second mounting area configured to contact by interference the radially outer ring in the assembled configuration;
an annular sealing element made of elastomeric material and integrally supported by the second annular screen, the annular sealing element comprising:
a first contacting annular sealing lip projecting from the second annular screen towards the first screen, wherein the first contacting sealing lip interacts slidingly with the first flange portion of the first annular screen; and
a second contacting annular sealing lip projecting from the second annular screen towards the first screen, wherein the second contacting sealing lip interacts slidingly with the inclined connecting portion of the first annular screen; and
a non-contacting annular lip extending axially towards the first flange portion of the first annular screen,
wherein, the non-contacting annular lip is disposed radially between a labyrinth seal at an external end of the sealing device and the at least one contacting annular sealing lip at an internal end of the sealing device,
the non-contacting annular lip and the first flange of the first annular screen define between them a gap comprising an axial width of less than 1.3 mm, and
the first flange portion and the first sleeve portion of the first annular screen form a step positioned radially inside the first annular screen and facing axially the second annular screen and the annular sealing element, wherein the step comprising a connecting radius of between 0.7 mm and 1.2 mm.