Rolling bearing
By designing the guide surface of the radial curved surface on the beams of the rolling bearing, the problem of severe and early failure of the cylindrical rolling body surface in the existing rolling bearing in the existing rolling bearing achieves the effect of reducing contact stress and extending the service life.
Patent Information
- Application Number
- CN202310918997.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-25
- Publication Date
- 2025-01-28
AI Technical Summary
In existing rolling bearings, the surface coating of the cylindrical rolling element is severely rubbed, resulting in early failure, and the contact point between the cross beam of the cage and the cylindrical rolling element is a contact point, which increases the risk of wear.
Design a rolling bearing, which keeps the beams of the shelf, has a guidance surface, and the radial upward is the curved surface. It is used to contact the roller surface with the cylindrical scroll to reduce the contact stress and increase the contact area.
By increasing the contact area of the guidance surface of the cylindrical roller and the beam, the contact stress is reduced, the wear is reduced, the service life of the bearings is prolonged, and the early failure is avoided.
Smart Images
Figure CN119373787A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of bearings, and in particular to a rolling bearing. Background Art
[0002] In the related art, the contact surface between the cross beam of the stamped steel retaining frame and the cylindrical rolling element is usually an inclined straight surface. In the actual working process, the contact part between the cross beam of the retaining frame and the cylindrical rolling element is a contact point from the radial cross-sectional view, and there is a contact line between the cross beam of the retaining frame and the cylindrical rolling element in the axial direction.
[0003] In actual applications, the surface coating of the cylindrical rolling element in the contact area has severe friction. For example, bright wear marks appear on the surface of the cylindrical rolling element due to wear, which can easily cause early failure of the bearing due to the wear of the cylindrical rolling element. Summary of the invention
[0004] In order to overcome the problems existing in the related art, the present invention provides a rolling bearing.
[0005] According to the first aspect of an embodiment of the present invention, the present invention provides a rolling bearing, comprising: a cylindrical rolling element; and a retaining frame, the retaining frame comprising an axially extending crossbeam, the crossbeam comprising a guide surface for contacting and guiding the raceway surface of the cylindrical rolling element, wherein in the radial direction, the crossbeam has no retaining force on the cylindrical rolling element, and the crossbeam is located radially inside the pitch circle of the rolling bearing, and the guide surface is a radial curved surface that matches the raceway surface of the cylindrical rolling element.
[0006] In some embodiments, the guide surface is axially located at two axial ends of the beam.
[0007] In some embodiments, the crossbeam further includes a non-guiding surface that is not in contact with the cylindrical rolling element, and the non-guiding surface is located radially inward of the guiding surface and connected to the radially inner side of the guiding surface.
[0008] In some embodiments, in a radial cross section, a radius of curvature of the guide surface is greater than or equal to a radius of the cylindrical rolling element.
[0009] In some embodiments, the retaining frame further includes: a first side beam connected to one axial end of the cross beam; and a second side beam connected to the other axial end of the cross beam, wherein the first side beam, the second side beam and the cross beam are integrally formed.
[0010] In some embodiments, the retainer is made of a metal material.
[0011] The technical solution provided by the embodiments of the present invention may include the following beneficial effects: the guiding surface is a curved surface with a certain curvature in the radial direction, which can make the guiding surface of the beam located below the pitch circle of the cylindrical rolling element bearing fit as closely as possible with the raceway surface of the cylindrical rolling element, thereby increasing the contact area between the cylindrical rolling element and the guiding surface of the beam, so as to reduce the contact stress between the retaining frame and the cylindrical rolling element, reduce the wear between the raceway surface and the guiding surface of the cylindrical rolling element, avoid premature failure of the bearing caused by wear of the raceway surface of the cylindrical rolling element, and extend the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0013] Figure 1 is a perspective view of a retainer according to an exemplary embodiment;
[0014] Figure 2 yes Figure 1 Schematic diagram of part of the structure of the middle cage;
[0015] Figure 3 is a side view of a retainer and a cylindrical rolling element according to an exemplary embodiment. DETAILED DESCRIPTION
[0016] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.
[0017] In the present invention, unless otherwise specified, the axial direction A, radial direction R and circumferential direction W refer to the axial direction A, radial direction R and circumferential direction W of the cage respectively; the axial end refers to Figure 1 and Figure 2 The left end of the axis A is the other end of Figure 1 and Figure 2 The radially outer side is Figure 3 The upper end, radially inward refers to Figure 3 The lower end of .
[0018] In order to solve the above technical problems, the present invention provides a rolling bearing. The rolling bearing at least includes a cylindrical rolling element 10 and a cage 20 .
[0019] like Figure 1 and Figure 2As shown, the cage 20 at least includes: a plurality of cross beams 21 extending in the axial direction A, a first side beam 22 and a second side beam 23. The first side beam 22 and the second side beam 23 are circular, and in this embodiment, the rolling body 10 is a cylindrical rolling body 10, so the first side beam 22 and the second side beam 23 can be the same size.
[0020] Furthermore, the first side beam 22 is connected to one axial end of the cross beam 21, and the second side beam 23 is connected to the other axial end of the cross beam 21, that is, the plurality of cross beams 21 are located between the first side beam 22 and the second side beam 23 along the axial direction A, and the plurality of cross beams 21 are evenly distributed along the circumferential direction.
[0021] Furthermore, the first side beam 22, the second side beam 23 and the cross beam 21 are integrally formed, and the integrally formed retainer 20 can make the structure of the retainer 20 more stable. The first side beam 22, the second side beam 23 and the cross beam 21 are integrally formed of a metal material, preferably, the metal material can be stainless steel. The retainer 20 made of a metal material can ensure the strength of the retainer 20, so that the retainer 20 is not easily deformed.
[0022] Furthermore, a plurality of cross beams 21 are arranged in parallel and at intervals along the circumferential direction W, and pockets 24 are formed between two adjacent cross beams 21, and the cylindrical rolling body 10 is located at the pockets 24. Each cross beam 21 includes a guide surface 211, which is used to abut against the raceway surface 11 of the cylindrical rolling body 10. The raceway surface 11 of the cylindrical rolling body 10 is the cylindrical outer surface of the cylindrical rolling body 10 extending along the axial direction A.
[0023] Each cross beam 21 is provided with guide surfaces 211 on both sides along the circumferential direction W. Therefore, one pocket 24 includes the opposite guide surfaces 211 of two adjacent cross beams 21 . The opposite guide surfaces 211 are in contact with the raceway surfaces 11 of the cylindrical rolling elements 10 .
[0024] The pocket 24 is a roughly square hole, preferably a roughly rectangular hole, which matches the axial cross-section of the cylindrical rolling element 10 (the axial cross-section refers to the cross-section parallel to the center axis of the cylindrical rolling element 10), so that when the crossbeam 21 of the retaining frame 20 abuts against the raceway surface 11 of the cylindrical rolling element 10, especially in the axial direction A, the relative guide surfaces 211 in the pocket 24 are in contact with the raceway surface 11 of the cylindrical rolling element 10 as much as possible and the contact stress is the same.
[0025] Furthermore, in the radial direction R, the cross beam 21 has no retaining force on the cylindrical rolling body 10 , that is, the retaining frame 20 will not restrict the radial movement of the cylindrical rolling body 10 , and the cylindrical rolling body 10 can be easily taken out of the pocket 24 of the retaining frame 20 or installed into the pocket 24 .
[0026] The cross beam 21 may be located radially outside or inside the pitch circle of the cylindrical rolling element bearing. In this embodiment, the cross beam 21 is located radially inside the pitch circle of the cylindrical rolling element bearing. When the cylindrical rolling element 10 interacts with the cross beam 21, the cross beam 21 of the cage 20 applies a force generally toward the central axis of the cylindrical rolling element 10 to the cylindrical rolling element 10. Figure 3 As shown, the guide surface 211 is a curved surface with a certain curvature in the radial direction, which can make the guide surface 211 of the beam 21 located below the pitch circle of the cylindrical rolling element bearing fit as closely as possible with the raceway surface 11 of the cylindrical rolling element 10, thereby increasing the contact area between the raceway surface 11 of the cylindrical rolling element 10 and the guide surface 211 of the beam 21, so as to reduce the contact stress between the retaining frame 20 and the cylindrical rolling element 10, reduce the wear between the raceway surface 11 of the cylindrical rolling element 10 and the guide surface 211, avoid the early failure of the bearing caused by the wear of the raceway surface 11 of the cylindrical rolling element 10, and extend the service life of the bearing.
[0027] The pitch circle refers to the circle where the central axis of the cylindrical rolling element 10 of the rolling bearing is located.
[0028] In some embodiments, the entire axial direction A of the cross beam 21 can be the guide surface 211, that is, the entire cross beam 21 in the axial direction A can abut against the cylindrical rolling element 10. In this embodiment, the guide surface 211 is located at both ends of the axial direction A of the cross beam 21 along the axial direction A. Specifically, Figure 1 and Figure 2 As shown, along the axial direction A, the middle part of the cross beam 21 is recessed in the direction away from the raceway surface 11 of the cylindrical rolling element 10, so that there is a gap between the middle part of the cross beam 21 and the cylindrical rolling element 10, and they do not abut. In this way, the raceway surface 11 of the cylindrical rolling element 10 is prevented from abutting and wearing against the cross beam 21 in the entire axial direction A, and the wear length in the axial direction A is reduced.
[0029] In addition, the two guide surfaces 211 at both ends of the cross beam 21 in the axial direction A are symmetrically arranged along the center point of the cross beam 21 in the axial direction A, so that the cross beam 21 and the cylindrical rolling element 10 can be subjected to uniform force in the axial direction A.
[0030] In some embodiments, Figure 3 As shown, the cross beam 21 also includes a non-guide surface 212 that does not contact the cylindrical rolling element 10. In this embodiment, the cross beam 21 of the retaining frame 20 is located radially inside the pitch circle of the cylindrical rolling element bearing. Therefore, the non-guide surface 212 is located radially inside the guide surface 211 and is connected to the radial inside of the guide surface 211. The non-guide surface 212 does not abut the raceway surface 11 of the cylindrical rolling element 10.
[0031] The non-guide surface 212 can prevent the guide surface 211 from occupying the entire radial thickness of the beam 21, thereby preventing the pocket 24 from having an overly sharp and weak structure, and preventing the sharp and weak structure from being bent, lifted or broken during the long-term friction between the beam 21 and the cylindrical rolling element 10 and remaining between the guide surface 211 and the raceway surface 11 of the cylindrical rolling element 10, thereby causing wear or even failure of the raceway surface 11 of the cylindrical rolling element 10.
[0032] In the radial section, the curvature radius of the guide surface 211 of the cross beam 21 may be inconsistent with the radius of the cylindrical rolling body 10. For example, in some embodiments, the curvature radius of the guide surface 211 is greater than or equal to the radius of the cylindrical rolling body 10. The radial section refers to a section perpendicular to the central axis of the cage 20 or the cylindrical rolling body 10.
[0033] Therefore, in actual assembly, there may be a gap between the cylindrical rolling element 10 and the pocket 24 (i.e., the guide surface 211 of the beam 21), and the gap can affect the radial R movement between the cylindrical rolling element 10 and the retaining frame 20, and the radial R movement can affect the stability and noise of the entire rolling bearing during operation.
[0034] The width of the non-guide surface 212 can be set according to design requirements and is not specifically limited here.
[0035] It is further understood that the terms "first", "second", etc. are used to describe various structures, but these structures should not be limited to these terms. These terms are only used to distinguish structures of the same type from each other, and do not indicate a specific order or importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present invention, a first structure can also be referred to as a second structure, and similarly, a second structure can also be referred to as a first structure.
[0036] It should be further understood that the terms "center", "longitudinal", "lateral", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.
[0037] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the following scope of rights.
[0038] It should be understood that the present invention is not limited to the precise structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the scope of the appended claims.
Claims
1. A rolling bearing, characterized in that: include: A cylindrical rolling element (10); and A retainer (20), the retainer (20) comprising a crossbeam (21) extending in the axial direction (A), the crossbeam (21) comprising a guide surface (211) for contacting and guiding the raceway surface (11) of the cylindrical rolling element (10), Wherein, in the radial direction (R), the crossbeam (21) has no retaining force on the cylindrical rolling element (10), and the crossbeam (21) is located radially inside the pitch circle of the rolling bearing, and the guide surface (211) is a radial curved surface that matches the raceway surface (11) of the cylindrical rolling element (10).
2. The rolling bearing according to claim 1, characterized in that: The guide surfaces (211) are located at two axial ends of the crossbeam (21) along the axial direction (A).
3. The rolling bearing according to claim 1, characterized in that: The cross beam (21) further comprises a non-guide surface (212) that is not in contact with the cylindrical rolling element (10); the non-guide surface (212) is located radially inward of the guide surface (211) and is connected to the radially inward of the guide surface (211).
4. The rolling bearing according to claim 1, characterized in that: In a radial cross section, the curvature radius of the guide surface (211) is greater than or equal to the radius of the cylindrical rolling body (10).
5. The rolling bearing according to any one of claims 1 to 4, characterized in that: The retaining frame (20) further comprises: A first side beam (22) connected to one axial end of the cross beam (21); and The second side beam (23) is connected to the other axial end of the cross beam (21). Wherein, the first side beam (22), the second side beam (23) and the cross beam (21) are integrally formed.
6. The rolling bearing according to any one of claims 1 to 4, characterized in that: The retaining frame (20) is made of metal material.