Roller pin with high wear resistance

Abstract

The utility model provides a roller pin with high wear resistance. The roller pin comprises a roller pin body made of a metal material and a ceramic ring formed by solidifying ceramic powder, the roller pin body is coaxially embedded in the ceramic ring, and the two ends of the roller pin body in the axial direction are flush with the two ends of the ceramic ring in the axial direction; with the adoption of the structure, the ceramic ring is formed on the peripheral wall of the roller pin body by solidifying the ceramic powder, and the ceramic powder is flexible before solidification, so that the peripheral surface of the ceramic ring can be more easily in a flat state, and the ceramic ring can be prevented from being damaged after the roller pin is applied to a bearing. Abrasion of the roller pins and abrasion of the bearing inner ring and the bearing outer ring can be effectively avoided, and the service life of the bearing can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of needle rollers, and particularly relates to a needle roller with high wear resistance. Background Art

[0002] As an important component on a bearing, when in use, a needle roller is rotatably connected to a needle roller cage, and the needle roller is located between the inner ring and the outer ring of the bearing; currently, the needle rollers on the market are all columnar objects made of metal materials, and it is very difficult to make the circumferential surface of the needle roller body made of metal materials completely flat. Therefore, after the needle roller is applied to the bearing, it is easy to cause wear of the needle roller itself and the inner ring and the outer ring of the bearing, that is, it will affect the service life of the bearing. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a needle roller with high wear resistance, which can effectively avoid the wear of the needle roller itself and the inner ring and the outer ring of the bearing after the needle roller is applied to the bearing, that is, it can improve the service life of the bearing.

[0004] The utility model provides a needle roller with high wear resistance, which comprises a needle roller body made of metal material and a ceramic ring formed by consolidating ceramic powder; the needle roller body is coaxially embedded in the ceramic ring, and the two ends of the needle roller body in the axial direction are flush with the two ends of the ceramic ring in the axial direction.

[0005] After the utility model adopts the above structure, since the ceramic ring is consolidated by ceramic powder and formed on the outer peripheral wall of the needle roller body, and since the ceramic powder is flexible before consolidation, it is easier to make the circumferential surface of the ceramic ring flat. Furthermore, after the needle roller is applied to the bearing, it can effectively avoid the wear of the needle roller itself and the inner ring and the outer ring of the bearing, that is, it can improve the service life of the bearing.

[0006] In a possible implementation manner, a plurality of grooves are arranged on the outer wall of the needle roller body at circumferential intervals, and both ends of each groove extend to the two ends of the needle roller body in the axial direction respectively; convex ribs corresponding to each groove are formed on the inner wall of the ceramic ring, and each convex rib is fitted with the groove at the corresponding position; after adopting this structure, the ceramic ring and the needle roller body can be more reliably fixed together through the convex ribs and the grooves, that is, the reliability of the circumferential limit between the ceramic ring and the needle roller body can be improved, and the bonding strength between the ceramic ring and the needle roller body can be improved.

[0007] In a possible implementation, a plurality of circumferentially spaced convex strips are provided on the outer wall of the needle body. The plurality of convex strips and a plurality of grooves are spaced apart along the circumferential direction of the needle body. Both ends of each convex strip extend to the two end portions of the needle body in the axial direction. Engaging grooves corresponding to each convex strip are formed on the inner wall of the ceramic ring, and each engaging groove is engaged with the convex strip at the corresponding position. By adopting this structure, the ceramic ring and the needle body can be more reliably fixed together through the engaging grooves and the convex strips, that is, the reliability of the circumferential limit between the ceramic ring and the needle body can be improved, and the bonding strength between the ceramic ring and the needle body can be improved.

[0008] In a possible implementation, annular rounded surfaces are formed on the outer peripheral walls at both ends of the ceramic ring in the axial direction. After the outer peripheral walls at both ends of the ceramic ring in the axial direction are provided as annular rounded surfaces, after the needle is installed on the needle cage in the bearing, the friction force between both ends of the needle and the needle cage can be effectively reduced, that is, the rotational damping between the needle and the needle cage can be reduced, which also means that the rotation of the needle and the needle cage can be made smoother, and the wear of the needle and the needle cage can be reduced. Description of the Drawings

[0009] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0010] Figure 2 is a sectional structural schematic diagram of the present utility model. Detailed Embodiments

[0011] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0012] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0013] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0014] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] See Figure 1-2 As shown, an embodiment of the present application discloses a needle roller with high wear resistance, including a needle roller body 1 made of a metal material and a ceramic ring 2 formed by consolidating ceramic powder; the needle roller body 1 is coaxially embedded in the ceramic ring 2, and both ends of the needle roller body 1 in the axial direction are flush with both ends of the ceramic ring 2 in the axial direction; in the above structure, after the needle roller body is processed, the ceramic powder is consolidated on the outer wall of the needle roller body and sintered to form a ceramic ring.

[0016] A plurality of grooves 11 are circumferentially and spacedly arranged on the outer wall of the needle roller body 1, and both ends of each groove 11 extend to both ends of the needle roller body 1 in the axial direction respectively. Ribs 21 corresponding to each groove 11 are formed on the inner wall of the ceramic ring 2, and each rib 21 is fitted with the groove 11 at the corresponding position; by adopting this structure, the ceramic ring and the needle roller body can be more reliably fixed together through the ribs and grooves, that is, the reliability of the circumferential limit between the ceramic ring and the needle roller body can be improved, and the bonding strength between the ceramic ring and the needle roller body can be improved.

[0017] A plurality of ridges 12 are circumferentially and spacedly arranged on the outer wall of the needle roller body 1, the plurality of ridges 12 and the plurality of grooves 11 are circumferentially spaced on the needle roller body 1, both ends of the ridges 12 extend to both ends of the needle roller body 1 in the axial direction respectively. Embedding grooves 22 corresponding to each ridge 12 are formed on the inner wall of the ceramic ring 2, and each embedding groove 22 is fitted with the ridge 12 at the corresponding position; by adopting this structure, the ceramic ring and the needle roller body can be more reliably fixed together through the embedding grooves and ridges, that is, the reliability of the circumferential limit between the ceramic ring and the needle roller body can be improved, and the bonding strength between the ceramic ring and the needle roller body can be improved.

[0018] Circular rounded surfaces 23 are formed on the outer peripheral walls at both ends of the ceramic ring 2 in the axial direction; after the outer peripheral walls at both ends of the ceramic ring in the axial direction are set as circular rounded surfaces, after the needle rollers are installed on the needle roller cage in the bearing, the friction between the two ends of the needle rollers and the needle roller cage can be effectively reduced, that is, the rotational damping between the needle rollers and the needle roller cage can be reduced, which means that the rotation of the needle rollers and the needle roller cage can be made smoother, and the wear of the needle rollers and the needle roller cage can be reduced.

[0019] As described above, only the specific embodiments of the present application are provided, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A needle roller with high wear resistance, characterized in that: It includes a needle roller body (1) made of a metal material and a ceramic ring (2) formed by consolidating ceramic powder; the needle roller body (1) is coaxially embedded in the ceramic ring (2), and the two ends of the needle roller body (1) in the axial direction are flush with the two ends of the ceramic ring (2) in the axial direction.

2. The needle roller with high wear resistance according to claim 1, characterized in that: A plurality of grooves (11) are circumferentially and spacedly arranged on the outer wall of the needle roller body (1), and both ends of each groove (11) respectively extend to the two ends of the needle roller body (1) in the axial direction. Ribs (21) corresponding to each groove (11) are formed on the inner wall of the ceramic ring (2), and each rib (21) is fitted with the groove (11) at the corresponding position.

3. The needle roller with high wear resistance according to claim 2, characterized in that: A plurality of ridges (12) are circumferentially and spacedly arranged on the outer wall of the needle roller body (1), and the plurality of ridges (12) and the plurality of grooves (11) are circumferentially spaced on the needle roller body (1). Both ends of the ridge (12) respectively extend to the two ends of the needle roller body (1) in the axial direction. A fitting groove (22) corresponding to each ridge (12) is formed on the inner wall of the ceramic ring (2), and each fitting groove (22) is fitted with the ridge (12) at the corresponding position.

4. The needle roller with high wear resistance according to any one of claims 1-3, characterized in that: Circular rounded surfaces (23) are formed on the outer peripheral walls at both ends of the ceramic ring (2) in the axial direction.

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