Rolling element for a rolling bearing and rolling bearing
By employing asymmetrically designed rolling elements and raceways in self-aligning roller bearings, and utilizing circular arc rolling surfaces and raceway surfaces of different radii, the problems of sliding friction and stress concentration in self-aligning roller bearings are solved, thereby improving the stability and lifespan of the bearings and enabling them to adapt to different working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SCHAEFFLER TECHNOLOGIES AG & CO KG
- Filing Date
- 2024-11-28
- Publication Date
- 2026-05-29
AI Technical Summary
Self-aligning roller bearings exhibit significant sliding friction between the rolling elements and raceways during rotation, especially under heavy load conditions, which increases bearing surface wear and shortens service life. Traditional symmetrical modification schemes or tightness adjustments are insufficient to effectively solve the problem of asymmetrical sliding friction.
The rolling elements and raceways are designed with asymmetry. By using circular arc rolling surfaces and raceway surfaces with different radii, the contact surface shape between the rolling elements and raceways is optimized, reducing sliding friction and minimizing surface stress concentration.
It effectively reduces sliding friction between the rolling elements and the raceway, reduces surface stress concentration, improves the running stability and lifespan of the rolling elements, and can flexibly adapt to different working conditions.
Smart Images
Figure CN122107012A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bearing technology. More specifically, this invention relates to the field of rolling bearing technology. Background Technology
[0002] Self-aligning roller bearings, due to their structural characteristics, can simultaneously withstand radial and axial loads and automatically align themselves, thus they are widely used in various mechanical equipment. However, during actual rotation, the contact between the rolling elements and raceways of a self-aligning roller bearing is not always in a pure rolling state. Significant sliding friction can easily occur at the outer chamfered edges of the rolling elements' arc surfaces with the outer and / or inner ring raceways. This sliding friction phenomenon is particularly pronounced under heavy-load conditions, significantly increasing bearing surface wear, raising the risk of bearing surface failure, and shortening the bearing's service life.
[0003] To address the aforementioned issues, current improvement design solutions mainly fall into two categories: reshaping the rolling element surface curve and optimizing the contact between the rolling element and the raceway. For example, reshaping the rolling element surface using a logarithmic curve can optimize the contact state between the rolling element and the raceway, reducing sliding friction. Optimizing the contact can, to some extent, limit the sliding of the rolling element, thereby reducing sliding friction.
[0004] However, the sliding friction and operating conditions between the rolling elements and raceways of self-aligning roller bearings exhibit a clear trend. For example, under large axial forces, sliding friction will show asymmetrical characteristics at both ends of the rolling elements in a self-aligning roller bearing. Therefore, in situations with such pronounced operating characteristics, traditional symmetrical modification schemes or contact adjustment of the rolling elements are unlikely to effectively solve this asymmetrical sliding friction problem. Furthermore, while optimizing the contact between the rolling elements and raceways can reduce sliding friction, it increases the contact stress level of the raceways, which in turn accelerates bearing fatigue wear and reduces bearing life.
[0005] Therefore, there is a need for rolling elements and rolling bearings that can effectively solve the above problems. Summary of the Invention
[0006] One object of the present invention is to provide rolling elements and rolling bearings capable of reducing sliding friction between the rolling elements and raceways. Another object of the present invention is to provide rolling elements and rolling bearings capable of reducing contact stress. Yet another object of the present invention is to provide rolling elements and rolling bearings capable of flexibly adapting to different operating conditions.
[0007] One aspect of the present invention provides a rolling element for a rolling bearing, comprising: a first arcuate rolling surface and a second arcuate rolling surface, wherein the first arcuate rolling surface and the second arcuate rolling surface are configured to be tangent, the line connecting the center of the first arcuate rolling surface and the center of the second arcuate rolling surface passes through the point of tangency of the first arcuate rolling surface and the second arcuate rolling surface, the line is perpendicular to the rotation axis of the rolling element, and when viewed in an axial section, the radius of the first arcuate rolling surface and the radius of the second arcuate rolling surface are not equal.
[0008] According to an embodiment of the present invention, the first and second circular arc rolling surfaces are configured such that the line connecting the center of the first and second circular arc rolling surfaces divides the rolling body into two parts of equal length along the axis of rotation.
[0009] According to an embodiment of the present invention, the first and second circular arc rolling surfaces are configured such that the line connecting the center of the first and second circular arc rolling surfaces divides the rolling body into two parts of unequal length along the axis of rotation.
[0010] According to an embodiment of the present invention, the rolling element further includes: a first curved surface, which is configured to be tangent to a first circular arc rolling surface at the starting point of the first curved surface, wherein, when viewed in an axial section, the radius of curvature of the first curved surface is smaller than the radius of the first circular arc rolling surface.
[0011] According to an embodiment of the present invention, the rolling element further includes: a second curved surface, which is configured to be tangent to the second circular arc rolling surface at the starting point of the second curved surface, wherein, when viewed in an axial section, the radius of curvature of the second curved surface is smaller than the radius of the second circular arc rolling surface.
[0012] Another aspect of the present invention provides a rolling bearing, comprising: an outer ring including a first inner raceway; an inner ring including a first outer raceway; and a first row of rolling elements disposed radially between the first inner raceway and the first outer raceway, wherein each of the first row of rolling elements is a rolling element according to an embodiment of the present invention.
[0013] According to an embodiment of the present invention, the first outer raceway includes a first circular arc outer raceway surface and a second circular arc outer raceway surface that are tangent to each other, and when viewed in an axial section, the radius of the first circular arc outer raceway surface is not equal to the radius of the second circular arc outer raceway surface.
[0014] According to an embodiment of the present invention, the first inner raceway includes a first circular arc inner raceway surface and a second circular arc inner raceway surface that are tangent to each other, and when viewed in an axial section, the radius of the first circular arc inner raceway surface is not equal to the radius of the second circular arc outer raceway surface.
[0015] According to an embodiment of the present invention, the outer ring further includes a second inner raceway, and the first inner raceway and the second inner raceway are continuously arranged along the axial direction; the inner ring further includes a second outer raceway, and the first outer raceway and the second outer raceway are spaced apart along the axial direction; and the rolling bearing further includes: a second row of rolling elements, which are radially arranged between the second inner raceway and the second outer raceway, wherein each of the second row of rolling elements is a rolling element according to an embodiment of the present invention.
[0016] According to an embodiment of the present invention, the first inner raceway includes a first circular arc inner raceway surface and a second circular arc inner raceway surface that are tangent to each other, the radius of the first circular arc inner raceway surface being unequal to the radius of the second circular arc inner raceway surface; the second inner raceway includes a third circular arc inner raceway surface and a fourth circular arc inner raceway surface that are tangent to each other, the radius of the third circular arc inner raceway surface being unequal to the radius of the fourth circular arc inner raceway surface; and the second circular arc inner raceway surface and the fourth circular arc inner raceway surface are configured to be tangent to each other, and the radius of the second circular arc inner raceway surface is equal to the radius of the fourth circular arc inner raceway surface.
[0017] According to embodiments of the present invention, by using arc rolling surfaces with different radii for the rolling elements and / or arc raceway surfaces with different radii for the raceways, the contact surface shape between the rolling elements and the raceways can be optimized, the sliding friction between the rolling elements and the raceways can be reduced, the surface stress concentration can be reduced, and different working conditions can be flexibly adapted. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of a rolling bearing according to an embodiment of the present invention.
[0019] Figure 2 This is a schematic diagram of a rolling element according to an embodiment of the present invention.
[0020] Figure 3 This is a schematic diagram of a rolling element according to another embodiment of the present invention.
[0021] Figure 4 This is a schematic diagram of a rolling element according to another embodiment of the present invention.
[0022] Figure 5 This is a schematic diagram of a rolling bearing according to another embodiment of the present invention.
[0023] Figure 6 This is a schematic diagram of a rolling bearing according to another embodiment of the present invention. Detailed Implementation
[0024] Hereinafter, embodiments of the invention are described with reference to the accompanying drawings. The following detailed description and drawings are provided to exemplify the principles of the invention, which is not limited to the described preferred embodiments; the scope of the invention is defined by the claims. The invention is now described in detail with reference to exemplary embodiments, some of which are illustrated in the accompanying drawings. The following description is made with reference to the accompanying drawings, and unless otherwise indicated, the same reference numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all aspects of the invention. Rather, these embodiments are merely examples of systems and methods related to various aspects of the invention as covered in the appended claims.
[0025] This invention provides a rolling bearing, more specifically a self-aligning roller bearing. The rolling bearing according to embodiments of the invention is particularly suitable for applications requiring simultaneous bearing of large radial and axial loads, such as industrial machinery and wind turbines.
[0026] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. Figure 1 This is a schematic diagram of a rolling bearing according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a rolling element according to an embodiment of the present invention. Figure 3 This is a schematic diagram of a rolling element according to another embodiment of the present invention. Figure 4 This is a schematic diagram of a rolling element according to another embodiment of the present invention. Figure 5 This is a schematic diagram of a rolling bearing according to another embodiment of the present invention. Figure 6 This is a schematic diagram of a rolling bearing according to another embodiment of the present invention.
[0027] According to embodiments of the present invention, such as Figure 1 As shown, the rolling bearing includes an outer ring 10, an inner ring 20, and rolling elements. In an exemplary embodiment, the rolling bearing is a double-row roller bearing, such as a double-row self-aligning roller bearing. In some embodiments, the rolling bearing includes a first row of rolling elements 30 and a second row of rolling elements 40. However, the invention is not limited to double-row roller bearings. In other embodiments, the rolling bearing may include only one row of rolling elements. In some embodiments, the rolling bearing further includes a cage 50.
[0028] The outer ring 10 includes a first inner raceway 11 and a second inner raceway 12. In some embodiments, when viewed in an axial section, the first inner raceway 11 and the second inner raceway 12 each have an arcuate shape. In an exemplary embodiment, as shown... Figure 1 As shown, the first inner raceway 11 and the second inner raceway 12 are arranged continuously along the axial direction, that is, there is no gap between the first inner raceway 11 and the second inner raceway 12 to form a continuous rolling surface. In some embodiments, the raceway surface of the first inner raceway 11 and the raceway surface of the second inner raceway 12 are tangent.
[0029] The inner ring 20 includes a first outer raceway 21 and a second outer raceway 22. In some embodiments, when viewed in an axial section, the first outer raceway 21 and the second outer raceway 22 each have an arcuate shape. In an exemplary embodiment, as shown... Figure 1 As shown, the first outer raceway 21 and the second outer raceway 22 are spaced apart along the axial direction.
[0030] A first row of rolling elements 30 is radially disposed between a first inner raceway 11 and a first outer raceway 21, and a second row of rolling elements 40 is radially disposed between a second inner raceway 12 and a second outer raceway 22. Thus, the rolling bearing comprises two rows of bearings. In some embodiments, the rolling elements 30 and 40 have the same shape.
[0031] According to an embodiment of the present invention, the rolling element 30 employs an asymmetrical design. In an exemplary embodiment, as shown... Figure 1 and Figure 2 The rolling element 30 includes a first arcuate rolling surface 31 and a second arcuate rolling surface 32. Viewed in an axial section, as... Figure 1 and Figure 2 As shown, the radius R of the first circular arc rolling surface 31 31 The radius R is smaller than that of the second circular rolling surface 32. 32 However, the invention is not limited thereto. In some embodiments, the radius R of the first arc rolling surface 31 31 The radius R is greater than that of the second circular rolling surface 32. 32 Therefore, by using circular arc rolling surfaces with different radii for the rolling elements, the contact surface shape between the rolling elements and the raceways can be optimized, reducing sliding friction between the rolling elements and the raceways and lowering surface stress concentration. For example, compared to using rolling surfaces with a uniform arc radius, the rolling elements according to embodiments of the present invention can reduce sliding friction with the raceways at circular arc rolling surfaces with smaller radii.
[0032] In an exemplary embodiment, such as Figure 1 As shown, when the rolling element 30 is installed in the rolling bearing, the first arcuate rolling surface 31 is closer to the minimum inner diameter of the outer ring 10 relative to the second arcuate rolling surface 32. More specifically, in a double-row self-aligning roller bearing, the first arcuate rolling surface 31 of the rolling element 30 is closer to the axial outer side of the rolling bearing relative to the second arcuate rolling surface 32, as shown... Figure 1 As shown. However, it should be understood that the invention is not limited thereto.
[0033] Observed in the axial section, as Figure 1 and Figure 2 As shown, the first arc rolling surface 31 and the second arc rolling surface 32 are tangent. In this case, the center C of the first arc rolling surface 31... 31 The center C of the second circular rolling surface 32 32 The line L30 Passing through the tangent point P of the first circular rolling surface 31 and the second circular rolling surface 32 30 Connect L 30 With respect to the axis of rotation A of the rolling element 30 30 Vertical. Rolling element 30 at the point of tangency P. 30 The maximum outer diameter is located at this point. Therefore, the tangential design of the first arc rolling surface 31 and the second arc rolling surface 32 ensures the continuity and smoothness of the rolling element surface. This smooth transition can reduce stress concentration and improve the running stability and life of the rolling element.
[0034] The rolling element 30 has a rotation axis A 30 Limited length D 30 The center C of the first circular rolling surface 31 31 The center C of the second circular rolling surface 32 32 The line L 30 Rolling element 30 is rotated along axis A 30 Divided into two parts, each with a length D 31 and D 32 ,like Figure 2 As shown. In some embodiments, as Figure 2 As shown, the line L 30 Rolling element 30 is rotated along axis A 30 The two parts are of equal length, i.e., D 31 =D 32 However, the invention is not limited thereto. In some embodiments, such as Figure 3 As shown, the line L 30 Rolling element 30 is rotated along axis A 30 The two parts are not of equal length, i.e., D 31 ≠D 32 .
[0035] In some embodiments, the connection L 30 Rolling element 30 is rotated along axis A 30 The two parts are divided into two arc-shaped rolling surfaces, respectively. That is, the rolling surface of the rolling element 30 is composed of a first arc-shaped rolling surface 31 and a second arc-shaped rolling surface 32, as shown below. Figure 2 and Figure 3 As shown. However, the present invention is not limited thereto. In other embodiments, in addition to the first arcuate rolling surface 31 and the second arcuate rolling surface 32, the rolling element 30 may also include other curved surfaces. This will be described in detail below with reference to the accompanying drawings.
[0036] In some embodiments, such as Figure 4As shown, in addition to the first arc rolling surface 31 and the second arc rolling surface 32, the rolling element 30 also includes a first curved shaping surface 33, which is tangent to the first arc rolling surface 31 at its starting point. Figure 4 As shown, the point of tangency between the first curved shaping surface 33 and the first circular arc rolling surface 31 is P'. 30 In some embodiments, when viewed in an axial section, the radius of curvature of the first curved shaping surface 33 is smaller than the radius of the first circular arc rolling surface 31. In some embodiments, the radius of curvature of the first curved shaping surface 33 extends from the point of tangency P' with the first circular arc rolling surface 31. 30 The shape gradually decreases from the initial position. In an exemplary embodiment, viewed in an axial section, the first curved shaping surface 33 has a logarithmic curve shape. However, the invention is not limited thereto, and the first curved shaping surface 33 may also have other curved shapes.
[0037] In some embodiments, such as Figure 4 As shown, in addition to the first arc rolling surface 31 and the second arc rolling surface 32, the rolling body 30 also includes a second curved shaping surface 34, which is tangent to the second arc rolling surface 32 at its starting point. Figure 4 As shown, the point of tangency between the second curved shaping surface 34 and the second circular arc rolling surface 32 is P”. 30 In some embodiments, when viewed in an axial section, the radius of curvature of the second curved shaping surface 34 is smaller than the radius of the second circular arc rolling surface 32. In some embodiments, the radius of curvature of the second curved shaping surface 34 extends from the point of tangency P with the second circular arc rolling surface 32. 30 The shape gradually decreases from the initial position. In an exemplary embodiment, viewed in an axial section, the second curved surface 34 has a logarithmic curve shape. However, the invention is not limited thereto, and the second curved surface 34 may also have other curved shapes.
[0038] In an exemplary embodiment, such as Figure 4 As shown, the first curved shaping surface 33 is located at one axial end of the rolling element 30, and / or the second curved shaping surface 34 is located at the other axial end of the rolling element 30. Thus, the axial end edge of the rolling element 30 can be shaped to further reduce stress concentration when the rolling element 30 contacts the raceway at its edge.
[0039] According to embodiments of the present invention, the rolling element 40 may also employ an asymmetrical design. The design of the rolling element 40 can be referred to the above description of the rolling element 30, and will not be repeated here. However, the present invention is not limited thereto. In other embodiments, the rolling element 40 may also employ a symmetrical design.
[0040] Therefore, according to embodiments of the present invention, the rolling elements 30 and / or 40 can be specially designed to optimize the contact between the rolling elements and the raceways. However, the present invention is not limited thereto. In other embodiments, the outer ring 10 and / or inner ring 20 of the rolling bearing can also be specially designed to optimize the contact between the rolling elements and the raceways. A detailed description will now be provided with reference to the accompanying drawings.
[0041] The foregoing description of the inner ring 20's first outer raceway 21 and second outer raceway 22 both having arcuate shapes, i.e., the first outer raceway 21 and the second outer raceway 22 both having a uniform radius. However, the invention is not limited thereto. In some embodiments, the first outer raceway 21 has a different radius, and / or the second outer raceway 22 has a different radius. The following will describe the invention in detail with reference to the accompanying drawings, using the first outer raceway 21 as an example.
[0042] In some embodiments, such as Figure 5 As shown, the first outer raceway 21 of the inner ring 20 includes a first circular arc outer raceway surface 211 and a second circular arc outer raceway surface 212. Viewed in the axial section, as... Figure 2 As shown in the figure, the first circular arc outer raceway surface 211 and the second circular arc outer raceway surface 212 are tangent. In an exemplary embodiment, as... Figure 5 As shown, when viewed in an axial section, the radius R of the first circular arc outer raceway surface 211 is... 211 The radius R is greater than that of the second circular arc outer raceway surface 212. 212 However, the invention is not limited thereto. In some embodiments, the radius R of the first circular arc outer raceway surface 211 211 The radius R is smaller than that of the second circular arc outer raceway surface 212. 212 .
[0043] In an exemplary embodiment, such as Figure 5 As shown, the first arc-shaped outer raceway surface 211 is closer to the minimum outer diameter of the first outer raceway 21 of the inner ring 20 than the second arc-shaped outer raceway surface 212. More specifically, in a double-row self-aligning roller bearing, as... Figure 5 As shown, the first arc-shaped outer raceway surface 211 is closer to the axial outer side of the rolling bearing than the second arc-shaped outer raceway surface 212. However, it should be understood that the invention is not limited thereto.
[0044] In some embodiments, the second outer raceway 22 of the inner ring 20 may also include an arc-shaped outer raceway surface with a different radius. The design of the second outer raceway 22 can be referred to the description of the first outer raceway 21 above, and will not be repeated here.
[0045] The first inner raceway 11 and the second inner raceway 12 of the outer ring 10 described above each have an arc shape, that is, the first inner raceway 11 has a uniform radius and the second inner raceway 12 has a uniform radius. However, the present invention is not limited thereto. In some embodiments, the first inner raceway 11 has a different radius, and / or the second inner raceway 12 has a different radius. The following will describe in detail with reference to the accompanying drawings, taking the first inner raceway 11 as an example.
[0046] In some embodiments, such as Figure 6 As shown, the first inner raceway 11 of the outer ring 10 includes a first circular arc inner raceway surface 111 and a second circular arc inner raceway surface 112. Viewed in an axial section, as... Figure 6 As shown in the figure, the first inner raceway surface 111 and the second inner raceway surface 112 are tangent. In an exemplary embodiment, as... Figure 6 As shown, when viewed in an axial section, the radius R of the inner raceway surface 111 of the first circular arc is... 111 The radius R is greater than that of the second circular arc outer raceway surface 112. 112 However, the present invention is not limited thereto. In some embodiments, the radius R of the first circular arc inner raceway surface 111 111 The radius R is smaller than that of the second circular arc outer raceway surface 112. 112 .
[0047] In an exemplary embodiment, such as Figure 6 As shown, the first arc-shaped inner raceway surface 111 is closer to the minimum outer diameter of the first inner raceway 11 of the outer ring 10 than the second arc-shaped outer raceway surface 112. More specifically, in a double-row self-aligning roller bearing, as... Figure 6 As shown, the first inner raceway surface 111 is closer to the axial outer side of the rolling bearing than the second outer raceway surface 112. However, it should be understood that the invention is not limited thereto.
[0048] In some embodiments, such as Figure 6 As shown, the second inner raceway 12 of the outer ring 10 includes a third circular arc inner raceway surface 121 and a fourth circular arc inner raceway surface 122. Viewed in the axial section, as... Figure 6 As shown, the third inner raceway surface 121 and the fourth inner raceway surface 122 are tangent. In an exemplary embodiment, as... Figure 6 As shown in the figure, when viewed in the axial section, the radius R of the inner raceway surface 121 of the third circular arc is... 121 The radius R is greater than that of the inner raceway surface 122 of the fourth arc. 122 However, the invention is not limited thereto. In some embodiments, the radius R of the inner raceway surface 121 of the third circular arc... 121 The radius R is smaller than the inner raceway surface 122 of the fourth arc. 122 .
[0049] In some embodiments, such as Figure 6As shown, the second inner arc raceway surface 112 and the fourth inner arc raceway surface 122 are continuously arranged along the axial direction. In this case, the second inner arc raceway surface 112 and the fourth inner arc raceway surface 122 are tangent. In an exemplary embodiment, the radius R of the second inner arc raceway surface 112 is... 112 The radius R of the inner raceway surface 122 of the fourth circular arc 122 equal.
[0050] Furthermore, the radius R of the inner raceway surface 111 of the first circular arc 111 The radius R of the inner raceway surface 121 of the third circular arc 121 They can be equal or unequal.
[0051] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the constructions and methods of the above embodiments. Rather, the invention is intended to cover various modifications and equivalent configurations. Furthermore, while various elements and method steps of the disclosed invention have been shown in various exemplary combinations and constructions, other combinations including more or fewer elements or methods also fall within the scope of the invention.
[0052] List of reference numerals
[0053] 10. Outer ring;
[0054] 11. First inner raceway;
[0055] 111 First circular arc inner raceway surface;
[0056] 112 Second circular arc inner raceway surface;
[0057] 12. Second inner raceway;
[0058] 121 Third circular arc inner raceway surface;
[0059] 122. The inner raceway surface of the fourth arc;
[0060] 20 Inner circle;
[0061] 21. First outer raceway;
[0062] 211 First circular arc outer raceway surface;
[0063] 212 Second circular arc outer raceway surface;
[0064] 22. Second outer raceway;
[0065] 30 Rolling element;
[0066] 31 First circular rolling surface;
[0067] 32. Second circular rolling surface;
[0068] 33. First curve shaping surface;
[0069] 34. Second curve shaping surface;
[0070] 40 Rolling element;
[0071] 50. Cage.
Claims
1. A rolling element (30) for a rolling bearing, comprising: A first circular arc rolling surface (31) and a second circular arc rolling surface (32), wherein the first circular arc rolling surface (31) and the second circular arc rolling surface (32) are configured to be tangent, and the center (C) of the first circular arc rolling surface (31) is... 31 ) and the center (C) of the second circular rolling surface (32) 32 The line connecting (L) 30 The point of tangency (P) between the first circular rolling surface (31) and the second circular rolling surface (32) 30 The connecting line (L) 30 ) and the axis of rotation (A) of the rolling element (30) 30 Vertical, and Viewed in the axial section, the radius (R) of the first circular rolling surface (31) 31 The radius (R) of the second circular rolling surface (32) and the second circular rolling surface (32) 32 They are not equal.
2. The rolling element (30) according to claim 1, wherein, The first arc rolling surface (31) and the second arc rolling surface (32) are configured such that the center (C) of the first arc rolling surface (31) is... 31 ) and the center (C) of the second circular rolling surface (32) 32 The line connecting (L) 30 The rolling element (30) is moved along the axis of rotation (A). 30 It is divided into two parts of equal length.
3. The rolling element (30) according to claim 1, wherein, The first arc rolling surface (31) and the second arc rolling surface (32) are configured such that the center (C) of the first arc rolling surface (31) is... 31 ) and the center (C) of the second circular rolling surface (32) 32 The line connecting (L) 30 The rolling element (30) is moved along the axis of rotation (A). 30 It is divided into two parts of unequal length.
4. The rolling element (30) according to claim 2 or 3, further comprising: A first curved surface (33) is configured to be tangent to the first circular arc rolling surface (31) at its starting point. In axial section, the radius of curvature of the first curved surface (33) is smaller than the radius (R) of the first circular arc rolling surface (31). 31 ).
5. The rolling element according to claim 4, further comprising: The second curved surface (34) is configured to be tangent to the second circular arc rolling surface (32) at its starting point. In axial section, the radius of curvature of the second curved surface (34) is smaller than the radius (R) of the second circular arc rolling surface (32). 32 ).
6. A rolling bearing, comprising: The outer ring (10) includes a first inner raceway (11); The inner ring (20) includes the first outer raceway (21); A first row of rolling elements (30) is arranged radially between the first inner raceway (11) and the first outer raceway (21), wherein each of the first row of rolling elements (30) is a rolling element according to any one of claims 1 to 5.
7. The rolling bearing according to claim 6, wherein, The first outer raceway (21) includes a tangent first circular arc outer raceway surface (211) and a second circular arc outer raceway surface (212), and when viewed in an axial section, the radius (R) of the first circular arc outer raceway surface (211) is... 211 The radius (R) of the second circular arc outer raceway surface (212) and the radius (R) 212 They are not equal.
8. The rolling bearing according to claim 6 or 7, wherein, The first inner raceway (11) includes a tangent first circular arc inner raceway surface (111) and a second circular arc inner raceway surface (112), and when viewed in an axial section, the radius (R) of the first circular arc inner raceway surface (111) is... 111 The radius (R) of the second circular arc outer raceway surface (112) and the radius (R) 112 They are not equal.
9. The rolling bearing according to claim 6, wherein, The outer ring (10) further includes a second inner raceway (12), and the first inner raceway (11) and the second inner raceway (12) are continuously arranged along the axial direction; The inner ring (20) further includes a second outer raceway (22), and the first outer raceway (21) and the second outer raceway (22) are spaced apart axially; and The rolling bearing further includes: A second row of rolling elements (40) is arranged radially between the second inner raceway (12) and the second outer raceway (22), wherein each of the second row of rolling elements (40) is a rolling element according to any one of claims 1 to 5.
10. The rolling bearing according to claim 9, wherein, The first inner raceway (11) includes a tangent first circular arc inner raceway surface (111) and a second circular arc inner raceway surface (112), wherein the radius (R) of the first circular arc inner raceway surface (111) is... 111 The radius (R) of the inner raceway surface (112) of the second circular arc 112 They are not equal; The second inner raceway (12) includes a tangent third circular arc inner raceway surface (121) and a fourth circular arc inner raceway surface (122), wherein the radius (R) of the third circular arc inner raceway surface (121) is... 121 The radius (R) of the inner raceway surface (122) of the fourth circular arc 122 They are not equal; and The second inner arc raceway surface (112) is tangent to the fourth inner arc raceway surface (122), and the radius (R) of the second inner arc raceway surface (112) is... 111 The radius (R) of the inner raceway surface (122) of the fourth circular arc is... 121 )equal.