US 12,247,623 B2
Low friction sealing device and associated rolling bearing
Daniele Duch, San Gillio (IT); and Piero Genualdo, Turin (IT)
Assigned to AKTIEBOLAGET SKF, Gothenburg (SE)
Filed by AKTIEBOLAGET SKF, Gothenburg (SE)
Filed on Jul. 27, 2023, as Appl. No. 18/360,242.
Claims priority of application No. 102022000017076 (IT), filed on Aug. 10, 2022.
Prior Publication US 2024/0052888 A1, Feb. 15, 2024
Int. Cl. F16C 33/78 (2006.01); F16C 19/06 (2006.01); F16C 33/80 (2006.01)
CPC F16C 33/7823 (2013.01) [F16C 19/06 (2013.01); F16C 33/7883 (2013.01); F16C 33/80 (2013.01); F16C 2326/02 (2013.01); F16C 2326/10 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A sealing device for a rolling bearing, the rolling bearing having a radially inner ring and a radially outer ring, the sealing device comprising:
a first annular shield configured to be attached angularly integral to the radially inner ring of the bearing;
a second annular shield configured to be attached angularly integral to the radially outer ring of the bearing in a position facing the first shield, the first shield being housed radially within the second shield with reference to a common axis of symmetry of the first and second annular shields and of the inner and outer rings of the rolling bearing;
a first elastomeric sealing element formed integral in one piece with the second shield and having at least one elastically deformable annular sealing lip sealingly engageable with a sliding surface of the first shield disposed opposite to the second shield; and
a second elastomeric sealing element formed integral in one piece with the first shield at a radially outer end of the first shield and in a position facing a radially outer section of the first elastomeric sealing element, the second elastomeric sealing element and the radially outer section of the first elastomeric sealing element defining between them an annular channel at least partially inclined, having a direction of inclination forming a first acute angle with the axis of symmetry and on the side of the second shield, the annular channel being bounded between respective opposite facing lateral surfaces of the second elastomeric sealing element and of the radially outer section of the first elastomeric sealing element, a first of the lateral facing surfaces being defined by a conical surface having no relief and a second of the lateral facing surfaces being provided toward the first lateral surface with a plurality of annular steps configured to result in a plurality of localized reductions of a cross-sectional passage of the channel, while maintaining the direction of inclination substantially constant.