US 12,460,676 B2
Roller bearing having radially inner raceways with an optimized profile and associated radially outer ring of a bearing
Maurizio Bertola, Piscina (IT); Pruthviraj Mandya Shekar, Mandya (IN); and Carmelo Gulli, Turin (IT)
Assigned to Aktiebolaget SKF, Götenborg (SE)
Filed by AKTIEBOLAGET SKF, Götenborg (SE)
Filed on Aug. 28, 2023, as Appl. No. 18/238,717.
Claims priority of application No. 102022000018012 (IT), filed on Sep. 2, 2022.
Prior Publication US 2024/0077113 A1, Mar. 7, 2024
Int. Cl. F16C 33/58 (2006.01); F16C 19/18 (2006.01)
CPC F16C 33/583 (2013.01) [F16C 19/184 (2013.01); F16C 19/186 (2013.01); F16C 2326/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A rolling bearing, comprising:
a radially outer ring comprising:
a first annular raceway and a second annular raceway, the first and second annular raceways being formed on a radially inner lateral surface of the outer ring; and
an axial shoulder extending in a radially inward direction and formed between the first and second annular raceways, the axial shoulder comprising:
a first curvilinear stretch formed by a first arc of a first circle comprising a first radius of curvature and a first geometric center projected in a radially inward direction toward the inner ring;
a second curvilinear stretch including a second arc of a second circle comprising a second radius of curvature and a second geometric center projected in a radially outward direction away from the inner ring,
wherein the first and second curvilinear stretches are flush connected to one another by a first inflection point, the first inflection point representing a tangent point of the first circle and the second circle;
a radially inner ring; and a first row and
a second row of a plurality of rolling bodies interposed between the inner ring and the outer ring.
 
10. A radially outer ring for a rolling bearing, comprising:
a first annular raceway formed on a radially inner lateral surface of the radially outer ring;
a second annular raceway formed on the radially inner lateral surface of the radially outer ring adjacent to the first annular raceway;
an axial shoulder extending in a radially inward direction and formed between the first and second annular raceways, the axial shoulder comprising:
a first curvilinear stretch formed by a first arc of a first circle comprising a first radius of curvature and a first geometric center projected in a radially inward direction;
a second curvilinear stretch including a second arc of a second circle comprising a second radius of curvature and a second geometric center projected in a radially outward direction, wherein the first and second curvilinear stretches are flush connected to one another by a first inflection point, the first inflection point representing a tangent point of the first circle and the second circle;
a first terminal portion adjacent to the first annular raceway, wherein the first curvilinear stretch extends from a first demarcation point of the first terminal portion to the first inflection point;
a second terminal portion adjacent to the second annular raceway and on an opposite axial side of the axial shoulder than the first terminal portion, wherein the second curvilinear stretch extends from the first inflection point to a second demarcation point of the second terminal portion,
wherein the first terminal portion and the second terminal portion are separated by an axial distance of 5 mm or less, and
the second radius of curvature is three times greater than the first radius of curvature, and the second radius of curvature is equal to a sum of an axial length of the first curvilinear portion and an axial length of the second curvilinear portion.