US 12,253,110 B2
Self-aligning roller bearing
Christoph Schicke, Schweinfurt (DE); Andreas Bierlein, Hassfurt (DE); and Rainer Schröder, Egenhausen (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 18/018,090
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Jul. 16, 2021, PCT No. PCT/DE2021/100623
§ 371(c)(1), (2) Date Jan. 26, 2023,
PCT Pub. No. WO2022/022770, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 102020119948.1 (DE), filed on Jul. 29, 2020.
Prior Publication US 2023/0287930 A1, Sep. 14, 2023
Int. Cl. F16C 23/08 (2006.01); F16C 19/38 (2006.01)
CPC F16C 23/08 (2013.01) [F16C 19/38 (2013.01); F16C 23/086 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A self-aligning roller bearing, comprising:
an inner bearing ring;
an outer bearing ring, which is arranged coaxially with respect to the inner bearing ring;
rollers arranged in at least one roller row, the rollers of the at least one roller row each have a curved lateral surface which extends in a direction of a rotation axis of said rollers and has a radius;
the rollers of said at least one roller row roll over outer and inner curved raceways provided by the inner and outer bearing rings, respectively;
each of said raceways is assigned a respective groove point corresponding to a radial distance around which the curved raceway of the respective inner or outer bearing ring extends in a direction of the rotation axis of the bearing;
a pressure line intersects the rotation axis of the rollers of the at least one roller row at an angle of 90° at a point, where the rollers have a largest roller diameter, and the radius of the curved lateral surfaces is smaller than each of the respective outer and inner raceway radial distances;
the inner raceway for the rollers of the outer bearing ring has the groove point on the pressure line such that an inner raceway radius and the pressure line coincide;
the outer raceway for the rollers of the inner bearing ring has the groove point on a line such that an outer raceway radius and the line coincide; and
the pressure line and the line have a common intersection point, the line extends between the common intersection point and the groove point of the inner bearing ring, and a radial distance of the common intersection point from the groove point of the inner bearing ring is less than a radial distance from the groove point of the outer bearing ring;
wherein the common intersection point simultaneously forms a center point of the radius of the curved lateral surfaces of the rollers of the at least one roller row.
 
8. A self-aligning roller bearing, comprising:
an inner bearing ring;
an outer bearing ring arranged coaxially with respect to the inner bearing ring;
rollers arranged in a roller row, the rollers each have a curved lateral surface which extends in a direction of a rotation axis of said rollers and has a radius;
the rollers of said roller row roll over outer and inner curved raceways provided by the inner and outer bearing rings, respectively;
each of said raceways is assigned a respective groove point corresponding to a radial distance around which the curved raceway of the respective inner or outer bearing ring extends in a direction of the rotation axis of the bearing;
a pressure line intersects the rotation axis of the rollers of the roller row at an angle of 90°, where the rollers have a largest roller diameter, and the radius of the curved lateral surfaces is smaller than each of the respective outer and inner raceway radial distances;
the inner raceway for the rollers of the outer bearing ring has the groove point on the pressure line such that an inner raceway radius and the pressure line coincide;
the outer raceway for the rollers of the inner bearing ring has the groove point on a line such that an outer raceway radius and the line coincide; and
the pressure line and the line have a common intersection point, the line extends between the common intersection point and the groove point of the inner bearing ring, and a radial distance of the common intersection point from the groove point of the inner bearing ring is less than a radial distance from the groove point of the outer bearing ring;
wherein a course of the pressure line and line are in an angular relationship defined by:
β=arcsin(R2/R3*sin(α)),
wherein, in relation to a perpendicular running through the groove point of the inner raceway of the outer bearing ring and standing at a right angle to the rotation axis of the bearing, the angle α stands for the pressure angle of the pressure line and the angle β stands for an angle of the line and wherein R2 is the inner raceway radial distance on the outer bearing ring and R3 is the outer raceway radial distance on the inner bearing ring.
 
15. A self-aligning roller bearing, comprising:
an inner bearing ring;
an outer bearing ring, which is arranged coaxially with respect to the inner bearing ring;
rollers arranged in at least one roller row, the rollers of the at least one roller row each have a curved lateral surface which extends in a direction of a rotation axis of said rollers and has a radius;
the rollers of said at least one roller row roll over outer and inner curved raceways provided by the inner and outer bearing rings, respectively;
each of said raceways is assigned a respective groove point corresponding to a radial distance around which the curved raceway of the respective inner or outer bearing ring extends in a direction of the rotation axis of the bearing;
a pressure line intersects the rotation axis of the rollers of the at least one roller row at an angle of 90° at a point, where the rollers have a largest roller diameter, and the radius of the curved lateral surfaces is smaller than each of the respective outer and inner raceway radial distances;
the inner raceway for the rollers of the outer bearing ring has the groove point on the pressure line such that an inner raceway radius and the pressure line coincide;
the outer raceway for the rollers of the inner bearing ring has the groove point on a line such that an outer raceway radius and the line coincide; and
the pressure line and the line have a common intersection point, the line extends between the common intersection point and the groove point of the inner bearing ring, and a radial distance of the common intersection point from the groove point of the inner bearing ring is less than a radial distance from the groove point of the outer bearing ring;
wherein the self-aligning roller bearing is a double-row self-aligning roller bearing and the at least one roller row includes a first roller row and a second roller row, the first roller row and second roller row together with the rollers and the raceways in the inner and outer bearing rings are mirror-symmetrical with respect to a center line perpendicular to the rotation axis.