Roller pin with surface lubrication channel

Abstract

The utility model provides a roller pin with a surface lubrication channel, which comprises a roller pin body, at least one lubrication channel with two open ends is arranged on the roller pin body, the lubrication channel is arranged along the radial direction of the roller pin body and penetrates through the center line of the roller pin body, and the cross section of the lubrication channel is circular. The lubricating channel with the openings at the two ends is arranged on the needle roller body, and lubricating oil can be temporarily stored in the lubricating channel and flows out from the openings at the two ends, so that the surface lubricating effect is achieved, and the friction force between the surface of the needle roller and the inner ring and the outer ring of the needle roller bearing is reduced; according to the structure of the lubricating channel, only two small holes need to be formed in the surface of the roller pin, the influence on the friction coefficient is small, and the surface friction force is basically not increased; in addition, if dirt exists in the bearing, the dirt can enter the lubricating channel and cannot stay on the surface of the needle roller, the influence of the dirt on the use of the needle roller bearing is avoided, and the service life of the needle roller bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of needle roller bearings, in particular to a needle roller with a surface lubrication channel. Background Art

[0002] Needle roller bearings use needle rollers as rolling elements and are generally composed of an inner ring, an outer ring, and a cage. The needle rollers are mounted on the cage and roll as the bearing rotates, carrying the transmission force. In existing technology, needle rollers are typically slender, cylindrical, with their surfaces in contact with the inner and outer rings. Friction generates heat at these surfaces. Poor lubrication prevents heat dissipation, leading to overheating of the bearing.

[0003] Patent CN207437590U discloses a new needle roller with spirally distributed oil reservoirs on its surface to store lubricating oil for surface lubrication. However, the large area covered by the reservoirs increases the friction coefficient of the needle roller surface. Furthermore, during use, dirt easily embeds in the reservoirs, leaving difficult-to-remove dirt on the needle roller surface, shortening the bearing's service life. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to develop a new needle roller structure that can not only play a role in surface lubrication, but also reduce the friction coefficient of the needle roller surface, avoid dirt remaining on the needle roller surface, and extend the service life of the needle roller bearing.

[0005] To achieve the above-mentioned purpose, the present invention provides a needle roller with a surface lubrication channel, including a needle roller body, on which at least one lubrication channel with openings at both ends is provided. The lubrication channel is arranged along the radial direction of the needle roller body and passes through the center line of the needle roller body. The cross-section of the lubrication channel is circular.

[0006] The utility model provides a lubrication channel with openings at both ends on the needle roller body. Lubricating oil can be temporarily stored in the lubrication channel and flow out from the openings at both ends, thereby playing a surface lubrication role and reducing the friction between the needle roller surface and the inner and outer rings of the needle roller bearing. The structure of the lubrication channel only requires two small holes to be opened on the needle roller surface, which has little effect on the friction coefficient and basically does not increase the surface friction. In addition, if there is dirt in the bearing, it will enter the lubrication channel and will not stay on the needle roller surface, thereby avoiding the influence of dirt on the use of the needle roller bearing and extending the service life of the needle roller bearing.

[0007] Furthermore, the diameter d of the cross section of the lubrication channel and the diameter D of the needle roller body satisfy the relationship: 1 / 5 ≥ d / D ≥ 1 / 20. The diameter of the lubrication channel is limited to reduce the adverse effect on the surface friction coefficient while ensuring the oil storage effect.

[0008] Furthermore, the length L of the needle roller body and the diameter D of the needle roller body satisfy the relationship: 15≥L / D≥2.5. The needle roller body is a slender structure, ensuring that the needle roller bearing has a compact structure.

[0009] Furthermore, the distance between the center line of any lubrication channel and any end of the needle roller body is greater than or equal to 0.1×L and less than or equal to 0.9×L. The lubrication channel is provided near the middle of the needle roller body, and the lubricating oil flowing out of the lubrication channel can lubricate the entire needle roller.

[0010] Furthermore, the number n of the lubrication channels is 2 to 8. Providing multiple lubrication channels is beneficial to improving the lubrication effect.

[0011] Furthermore, the projections of the center lines of the lubrication channels on the radial plane of the needle roller body coincide with each other. The center lines of the multiple lubrication channels are located in the same axial plane, which ensures the lubrication effect and makes the needle roller easy to process.

[0012] Furthermore, the angle between the projections of the center lines of adjacent lubrication channels on the radial plane of the needle roller body is 180°>α>0°.

[0013] Furthermore, α=180 / n.

[0014] The needle roller structure of this type allows lubricating oil to flow out of the lubrication channel from multiple angles. During the rotation of the needle roller, each lubrication channel reciprocates to absorb and discharge oil, so that the surface of the needle roller is always covered with lubricating oil, reducing friction.

[0015] Furthermore, the diameters of the lubrication channels are equal, thereby ensuring that the oil storage capacity of the lubrication channels is consistent, thereby avoiding the occurrence of excessive local friction.

[0016] Furthermore, the spacing between the lubrication channels is equal, thereby ensuring that the lubrication effect on all parts of the needle roller surface is consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the needle roller in the embodiment of the present utility model.

[0018] Figure 2 This is an axial cross-sectional view of the needle roller in the embodiment of the present invention.

[0019] Figure 3 This is a perspective view of a needle roller in another embodiment of the present invention.

[0020] Figure 4 This is a cross-sectional view of a needle roller in another embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1- Needle roller body, 2- Lubrication channel. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0025] It should be noted that similar numbers and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0026] Combine Figure 1 and Figure 2 As shown, this embodiment provides a needle roller comprising a needle roller body 1. A lubrication channel 2 with openings at both ends is provided in the middle of the needle roller body 1. Lubrication channel 2 is radially disposed along the needle roller body 1 and has a circular cross-section, with its centerline intersecting the centerline of the needle roller body 1. Lubricating oil is temporarily stored in lubrication channel 2 and flows out through the openings at both ends, providing surface lubrication and reducing friction between the needle roller surface and the inner and outer rings of the needle roller bearing.

[0027] The needle roller body 1 is an elongated structure. In this embodiment, its length L and diameter D satisfy the relationship: L / D = 10. In this embodiment, the cross-sectional diameter d of the lubrication channel 2 and the diameter D of the needle roller body 1 satisfy the relationship: d / D = 1 / 10. This reduces the adverse effects on the surface friction coefficient of the lubrication channel 2 while ensuring effective oil storage. In other embodiments, the cross-sectional diameter d of the lubrication channel 2 and the diameter D of the needle roller body 1 satisfy the relationship: 1 / 5 ≥ d / D ≥ 1 / 20; and the length L of the needle roller body 1 and the diameter D of the needle roller body 1 satisfy the relationship: 15 ≥ L / D ≥ 2.5.

[0028] In this embodiment, the lubrication channel 2 is arranged in the middle position of the needle roller body 1, and the distance between its center line and both ends of the needle roller body 1 is 0.5×L, ensuring that the lubricating oil flowing out of the lubrication channel 2 can lubricate the entire needle roller.

[0029] Combine Figure 3 As shown, in another needle roller embodiment, three lubrication channels 2 are provided on the needle roller body 1. Providing multiple lubrication channels 2 is beneficial to improving the lubrication effect.

[0030] In this embodiment, the projections of the center lines of the lubrication channels 2 on the radial plane of the needle roller body 1 coincide with each other, that is, the center lines of the multiple lubrication channels 2 are located in the same axial plane, which facilitates hole drilling.

[0031] Preferably, the diameters of the lubrication channels 2 are equal, ensuring that the oil storage capacity of each lubrication channel 2 is consistent, thus avoiding excessive local friction. Furthermore, the spacing between the lubrication channels 2 is equal, ensuring that the lubrication effect is consistent across all areas of the needle roller surface.

[0032] Combine Figure 3 As shown, in another needle roller embodiment, two lubrication channels 2 are provided on the needle roller body 1, and the angle between the projections of the center lines of the two lubrication channels 2 on the radial plane of the needle roller body 1 is 90°.

[0033] In other embodiments, the number n of lubrication channels 2 can be selected from 3 to 8. The included angle between the projections of the center lines of adjacent lubrication channels 2 onto the radial plane of the needle roller body 1 is 180°>α>0°, preferably α=180 / n. This needle roller structure allows lubricating oil to flow out of the lubrication channels 2 from multiple angles. During needle roller rotation, lubricating oil flows along each lubrication channel 2, ensuring that the needle roller surface is always covered with lubricating oil, thereby reducing friction.

[0034] Compared with the needle roller of conventional structure, the needle roller with lubrication channel 2 provided in the above embodiment has the following advantages: a lubrication channel 2 with openings at both ends is provided on the needle roller body 1, and the lubricating oil can be temporarily stored in the lubrication channel 2 and flow out from the openings at both ends, thereby playing a surface lubrication role and reducing the friction between the needle roller surface and the inner and outer rings of the needle roller bearing; the structure of the lubrication channel 2 only requires two small holes to be opened on the surface of the needle roller body 1, which has little effect on the friction coefficient and basically does not increase the surface friction; in addition, if there is dirt in the bearing, it will enter the lubrication channel 2 and will not stay on the needle roller surface, thereby avoiding the influence of dirt on the use of the needle roller bearing and extending the service life of the needle roller bearing; and this needle roller structure is easy to process and suitable for industrial promotion.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A needle roller with a surface lubrication channel, characterized in that: The invention comprises a needle roller body (1), wherein at least one lubrication channel (2) with openings at both ends is provided on the needle roller body (1), the lubrication channel (2) is arranged along the radial direction of the needle roller body (1) and passes through the center line of the needle roller body (1), and the cross section of the lubrication channel (2) is circular.

2. The needle roller with a surface lubrication channel according to claim 1, characterized in that: The diameter d of the cross section of the lubrication channel (2) and the diameter D of the needle roller body (1) satisfy the relationship: 1 / 5≥d / D≥1 / 20.

3. The needle roller with a surface lubrication channel according to claim 1, characterized in that: The length L of the needle roller body (1) and the diameter D of the needle roller body (1) satisfy the relationship: 15≥L / D≥2.

5.

4. The needle roller with a surface lubrication channel according to claim 3, characterized in that: The distance between the center line of any one of the lubrication channels (2) and any one end of the needle roller body (1) is greater than or equal to 0.1×L and less than or equal to 0.9×L.

5. The needle roller with a surface lubrication channel according to any one of claims 1 to 4, characterized in that: The number n of the lubrication channels (2) is 2 to 8.

6. The needle roller with a surface lubrication channel according to claim 5, characterized in that: The projections of the center lines of the lubrication channels (2) on the radial plane of the needle roller body (1) coincide with each other.

7. The needle roller with a surface lubrication channel according to claim 5, characterized in that: The angle between the projections of the center lines of adjacent lubrication channels (2) on the radial plane of the needle roller body (1) is 180°>α>0°.

8. The needle roller with a surface lubrication channel according to claim 7, characterized in that: α=180 / n。 9. The needle roller with a surface lubrication channel according to claim 5, characterized in that: The diameters of the lubrication channels (2) are equal.

10. The needle roller with a surface lubrication channel according to claim 5, characterized in that: The spacing between the lubrication channels (2) is equal.

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