Radial high-load double-roller bearing retainer

Abstract

The utility model discloses a radial high-load double-roller bearing retainer which comprises two oppositely arranged annular frame bodies and a plurality of window beams connected with the two annular frame bodies, window holes for installing rolling bodies are formed between the adjacent window beams, and limiting protrusions abutting against the rolling bodies are arranged on the sides, facing the window holes, of the annular frame bodies in a protruding mode. An oil storage groove is formed between the limiting protrusion and the window beam so that the retention time of lubricating oil in the bearing can be prolonged. Each window hole comprises an upper window hole and a lower window hole communicated with the upper window hole, the right side of each window beam is provided with an upper protrusion facing the upper window hole, the left side of each window beam is provided with a lower protrusion facing the lower window hole, and the structural strength of the window beams is improved. The bottoms of the rolling bodies located in the upper window holes abut against the tops of the lower protrusions, the tops of the rolling bodies located in the lower window holes abut against the bottoms of the upper protrusions, the two rolling bodies in each window hole are arranged in a parallel and staggered mode, and the stability and reliability of bearing operation are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing retainers, and in particular relates to a radial high-load double-roller bearing retainer. Background Art

[0002] A cage (also known as a bearing retainer) is a bearing component that partially wraps around all or part of the rolling elements and moves with them. It is used to isolate the rolling elements and usually guides the rolling elements and holds them in the bearing.

[0003] Under high loads, bearing cages are prone to uneven radial force, which manifests as localized wear and deformation, leading to noise, vibration, and damage, significantly shortening the bearing cage's service life. Compared to single-row roller bearings, double-row roller bearings offer higher load capacity. However, in double-row roller bearings, greater friction is generated between the rolling elements and the cage. When the bearings operate at high speeds, the rolling elements directly contact the window beam, resulting in greater friction and increasing the strength requirements of the window beam structure. Utility Model Content

[0004] In response to the problems and shortcomings of the above-mentioned prior art, the present invention provides a radial high-load double-roller bearing cage. By arranging two rolling elements in each window hole of the bearing cage, the load-bearing capacity of the double-row roller bearing is improved. A limiting protrusion is provided on the inner side of the annular frame to reduce the contact area between the rolling elements and the annular frame, thereby reducing the friction between the rolling elements and the annular frame; oil storage tanks are provided on both sides of the limiting protrusion to store lubricating oil and improve the lubrication effect on the rolling elements; upper and lower protrusions are provided on the side walls of the window beam to enhance the structural strength of the window beam; the rolling elements are staggered in the window holes, which greatly improves the operational stability and reliability of the bearing structure, increases the load capacity, reduces noise, and greatly extends the service life of the bearing.

[0005] The utility model is realized through the following technical solutions:

[0006] A radial high-load double-roller bearing cage comprises two opposing annular frames and a plurality of window beams connecting the two annular frames. A window aperture for mounting a rolling element is formed between adjacent window beams. A limiting protrusion protrudes from the annular frame facing the window aperture, abutting against the rolling element. An oil reservoir is formed between the limiting protrusion and the window beam to increase the retention time of the lubricating oil within the bearing. Each window aperture includes an upper window aperture and a lower window aperture connecting to the upper window aperture. The right side of each window beam has an upper protrusion facing the upper window aperture, and the left side of each window beam has a lower protrusion facing the lower window aperture, enhancing the structural strength of the window beam. The bottom of the rolling element in the upper window aperture abuts against the top of the lower protrusion, while the top of the rolling element in the lower window aperture abuts against the bottom of the upper protrusion. The two rolling elements in each window aperture are arranged in a parallel, staggered arrangement, improving the stability and reliability of the bearing operation.

[0007] Furthermore, oil grooves are provided on the window beams on both sides of the upper window hole and on the window beams on both sides of the lower window hole to improve the lubrication effect of the lubricating oil on the rolling elements.

[0008] Furthermore, the width of the oil groove is the same as the thickness of the window beam, ensuring that the oil groove can communicate with the inner and outer sides of the bearing retainer.

[0009] Furthermore, the height of the oil groove is greater than half the height of the rolling element, ensuring that the lubricating oil has sufficient lubrication area for the rolling element.

[0010] Furthermore, each limiting protrusion has an oil guide hole that passes through the limiting protrusion and the annular frame. The oil guide hole is located in the middle position of each limiting protrusion. The axis of the oil guide hole is parallel to the axis of the bearing retainer, which facilitates the external lubricating oil to flow into the bearing retainer.

[0011] Furthermore, in the extension direction of the window beam, the upper protrusion has a protruding portion extending into the lower window hole, the lower protrusion has a protruding portion extending into the upper window hole, and the upper protrusion and the lower protrusion have an overlapping portion to avoid interference between the two rolling bodies in the window hole.

[0012] Furthermore, a transition chamfer is provided between the limiting protrusion and the annular frame.

[0013] Furthermore, the connection between the window beam and the annular frame has a rounded corner.

[0014] Furthermore, the bearing retainer is treated with overall plastic dipping, and the plastic dipping coating is a nylon coating.

[0015] Furthermore, the structures of the window beams are consistent and are evenly distributed along the circumferential direction of the annular frame.

[0016] Beneficial effects of the utility model:

[0017] 1. By arranging two rolling elements in each window hole of the bearing cage, the load-bearing capacity of the double-row roller bearing is improved;

[0018] 2. A limiting protrusion is provided on the inner side of the annular frame to reduce the contact area between the rolling element and the annular frame, thereby reducing the friction between the rolling element and the annular frame;

[0019] 3. Oil storage tanks are set on both sides of the limiting protrusion to store lubricating oil and improve the lubrication effect on the rolling elements;

[0020] 4. Set upper and lower bulges on the side walls of the window beam to enhance the structural strength of the window beam;

[0021] 5. The rolling elements staggered in the window holes greatly improve the operating stability and reliability of the bearing structure, increase the load capacity, reduce noise, and greatly extend the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram illustrating a connection embodiment of a radial high-load double-roller bearing cage in the present invention;

[0023] Figure 2 A schematic structural diagram for illustrating an exemplary embodiment of a radial high-load double-roller bearing cage in the present invention;

[0024] Figure 3 To illustrate Figure 2 A partial enlarged schematic diagram in the middle;

[0025] Figure 4 To illustrate Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0026] Figure 5 A partial simplified structural diagram is used to illustrate a schematic implementation of a radial high-load double-roller bearing cage in the utility model.

[0027] List of parts and reference numerals:

[0028] 1. Annular frame; 11. Limiting protrusion; 111. Transition chamfer; 12. Oil storage tank; 13. Oil guide hole; 14. Chamfer; 2. Window beam; 21. Upper protrusion; 22. Lower protrusion; 23. Oil trough; 3. Window hole; 31. Upper window hole; 32. Lower window hole; 4. Rolling element. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0031] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention not only refer to changes in position, but also include movements such as rotation and rolling in which there is no relative change in position but the state is changed.

[0032] Finally, it should be noted that when a component is referred to as being "located on" or "disposed on" another component, it can be on the other component or there may be an intervening component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0033] like Figures 1 to 5 The illustrated embodiment shows a radially high-load dual-roller bearing cage. The bearing cage comprises two opposing annular frames 1 and a plurality of window beams 2 connecting the two annular frames 1. Window apertures 3 for mounting rolling elements 4 are formed between adjacent window beams 2. A stopper protrusion 11 protrudes from the annular frame 1 on the side facing the window apertures 3, abutting against the rolling elements 4. An oil reservoir 12 is formed between the stopper protrusion 11 and the window beams 2 to increase the retention time of the lubricating oil within the bearing. Each window aperture 3 includes an upper window aperture 31 and a lower window aperture 32 connected to the upper window aperture 31. The right side of each window beam 2 features an upper protrusion 21 facing the upper window aperture 31, and the left side of each window beam 2 features a lower protrusion 22 facing the lower window aperture 32, enhancing the structural strength of the window beams 2. The bottom of the rolling element 4 in the upper window hole 31 abuts against the top of the lower protrusion 22, and the top of the rolling element 4 in the lower window hole 32 abuts against the bottom of the upper protrusion 21. The two rolling elements 4 in each window hole 3 are arranged in parallel and staggered, which improves the stability and reliability of the bearing operation.

[0034] In one embodiment, if Figure 5As shown, two rolling elements 4 are installed in each window hole 3 of the bearing retainer, and the two rolling elements 4 are arranged in a staggered parallel arrangement. The annular frame 1 has a limiting protrusion 11 protruding toward the inside of the window, reducing the contact area between the rolling elements 4 and the annular frame 1, thereby reducing the rotational resistance of the rolling elements 4. Because the limiting protrusion 11 protrudes from the annular frame 1, an oil reservoir 12 is formed between the limiting protrusion 11 and the window beams 2 on either side. The oil reservoir 12 increases the retention time of the lubricating oil in the bearing retainer, thereby improving the lubrication effect on the rolling elements 4 and reducing the frictional resistance between the rolling elements 4 and the bearing retainer.

[0035] The sidewalls of the window beam 2 are provided with an upper protrusion 21 and a lower protrusion 22, which enhance the structural strength of the window beam 2. Furthermore, the upper protrusion 21 and the lower protrusion 22 can form a lower position for the rolling element 4, so that the rolling element 4 located in the upper window hole 31 and the rolling element 4 located in the lower window hole 32 are staggered. This ensures that the load maintains high-precision radial parallelism during operation, significantly improving the operational stability and reliability of the bearing structure, increasing load capacity, reducing operating noise, and significantly extending the service life of the bearing.

[0036] Preferably, oil grooves 23 are provided on the window beams 2 on both sides of the upper window hole 31 and on the window beams 2 on both sides of the lower window hole 32 to improve the lubrication effect of the lubricating oil on the rolling elements 4 .

[0037] In one embodiment, by providing an oil groove 23 on the window beam 2, the fluidity of the lubricating oil in the bearing cage is improved, thereby improving the lubrication effect on the rolling element 4. Providing the oil groove 23 on the window beam 2 can effectively reduce the contact area between the rolling element 4 and the window beam 2, thereby reducing the frictional resistance of the rolling element 4 during operation.

[0038] Preferably, the width of the oil groove 23 is the same as the thickness of the window beam 2, ensuring that the oil groove 23 can communicate with the inner and outer sides of the bearing retainer.

[0039] Preferably, the height of the oil groove 23 is greater than half the height of the rolling element 4 , ensuring that the lubricating oil has sufficient lubrication area for the rolling element 4 .

[0040] Preferably, each limiting protrusion 11 has an oil guide hole 13 that passes through the limiting protrusion 11 and the annular frame 1. The oil guide hole 13 is located in the middle position of each limiting protrusion 11. The axis of the oil guide hole 13 is parallel to the axis of the bearing retainer, which facilitates the external lubricating oil to flow into the inside of the bearing retainer.

[0041] In one embodiment, when lubricating oil is added to the interior of the bearing, the lubricating oil can flow into the gap between the rolling element 4 and the bearing retainer through the oil guide hole 13, making it easier to fill the bearing retainer with the lubricating oil.

[0042] Preferably, in the extension direction of the window beam 2, the upper protrusion 21 has a protruding portion extending into the lower window hole 32, and the lower protrusion 22 has a protruding portion extending into the upper window hole 31. The upper protrusion 21 and the lower protrusion 22 have an overlapping portion to avoid interference between the two rolling bodies 4 in the window hole 3.

[0043] Preferably, a transition chamfer 111 is provided between the limiting protrusion 11 and the annular frame 1 .

[0044] Preferably, the connection between the window beam 2 and the annular frame 1 has a rounded corner 14 to improve the structural strength of the bearing retainer.

[0045] Preferably, the bearing retainer is treated with overall plastic dipping, and the plastic dipping coating is a nylon coating.

[0046] In one embodiment, the entire surface of the bearing cage is treated with a plastic dip coating, allowing the rigid rolling elements 4 to contact the plastic of the bearing cage. This significantly improves the friction environment, achieving resistance to low temperatures, corrosion, friction, and wear. The coated surface of the bearing cage is smooth, resistant to chemical corrosion, mold, wear, scratching, noise reduction, self-lubrication, and excellent cushioning properties, with a low coefficient of friction. This technology effectively protects the coated workpiece and extends the service life of the bearing cage.

[0047] Preferably, the window beams 2 have consistent structures and are evenly distributed along the circumferential direction of the annular frame 1 .

[0048] When using the aforementioned radial high-load double-roller bearing cage, the load-bearing capacity of the double-row roller bearing is improved by disposing two rolling elements 4 within each window hole 3 of the bearing cage. A limiting protrusion 11 is provided on the inner side of the annular frame 1 to reduce the contact area between the rolling elements 4 and the annular frame 1, thereby reducing the friction between the rolling elements 4 and the annular frame 1. Oil reservoirs 12 are provided on either side of the limiting protrusion 11 to store lubricating oil and improve the lubrication effect on the rolling elements 4. Upper and lower protrusions 21 and 22 are provided on the sidewalls of the window beam 2 to enhance the structural strength of the window beam 2. The staggered arrangement of the rolling elements 4 within the window holes 3 significantly improves the operational stability and reliability of the bearing structure, increases load capacity, reduces noise, and significantly extends the service life of the bearing.

[0049] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A radial high-load double-roller bearing cage, comprising two oppositely disposed annular frames and a plurality of window beams connecting the two annular frames, wherein window holes for mounting rolling elements are formed between adjacent window beams, characterized in that: A limiting protrusion abutting against the rolling element is protruded from one side of the annular frame toward the window hole, and an oil storage tank is formed between the limiting protrusion and the window beam; Each of the window holes includes an upper window hole and a lower window hole connected to the upper window hole. The right side of each window beam has an upper protrusion facing the upper window hole, and the left side of each window beam has a lower protrusion facing the lower window hole. The bottom of the rolling body located in the upper window hole abuts against the top of the lower protrusion, and the top of the rolling body located in the lower window hole abuts against the bottom of the upper protrusion. The two rolling bodies in each window hole are arranged in parallel and staggered.

2. A radial high load double roller bearing cage according to claim 1, characterized in that: Oil grooves are provided on the window beams on both sides of the upper window hole and on the window beams on both sides of the lower window hole.

3. A radial high load double roller bearing cage according to claim 2, characterized in that: The width of the oil passage groove is the same as the thickness of the window beam.

4. A radial high load double roller bearing cage according to claim 2, characterized in that: The height of the oil groove is greater than half the height of the rolling element.

5. The radial high load double roller bearing cage according to claim 1, characterized in that: Each of the limiting protrusions has an oil guide hole that passes through the limiting protrusion and the annular frame. The oil guide hole is located in the middle of each of the limiting protrusions, and the axis of the oil guide hole is parallel to the axis of the bearing retainer.

6. The radial high load double roller bearing cage according to claim 1, characterized in that: In the extending direction of the window beam, the upper protrusion has a protruding portion extending into the lower window hole, the lower protrusion has a protruding portion extending into the upper window hole, and the upper protrusion and the lower protrusion have an overlapping portion.

7. The radial high load double roller bearing cage according to claim 1, characterized in that: A transition chamfer is provided between the limiting protrusion and the annular frame.

8. The radial high-load double roller bearing cage according to claim 1, characterized in that: The connection between the window beam and the annular frame has a rounded corner.

9. The radial high-load double roller bearing cage according to claim 1, characterized in that: The bearing retainer is treated with overall plastic dipping, and the plastic dipping coating is a nylon coating.

10. The radial high load double roller bearing cage according to claim 1, characterized in that: The window beams have consistent structures and are evenly distributed along the circumferential direction of the annular frame.

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