Arch-shaped welding retainer

Abstract

The arch-shaped welding retainer comprises a first ring beam, a second ring beam and a plurality of bent window beams which are coaxially arranged, and pocket holes used for installing rotating bodies are formed between every two adjacent bent window beams and the first ring beam and between every two adjacent bent window beams and the second ring beam in a surrounding mode. The bent window beam comprises a supporting part, a first part and a second part, wherein the first part and the second part are symmetrically arranged at the two ends of the supporting part. First oil passing grooves are formed in the joint of the first ring beam and the first part and the joint of the second ring beam and the second part. The sides, facing the pockets, of the first part and the second part are provided with first pressing slopes, the sides, facing the pockets, of the supporting parts are provided with second pressing slopes, the sides, facing the pockets, of the supporting parts are further provided with oil passing slopes, and oil passing gaps are formed between the oil passing slopes and the rotating bodies. By adopting the arch-shaped welding retainer structure in the scheme, the flowability of lubricating grease can be improved, the lubricating effect of the retainer is improved, the rotating friction loss is reduced, and the durability and safety of the rotating body, the retainer and the whole bearing structure are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of bearing retainers, and in particular relates to a bow-shaped welded retainer. Background Art

[0002] Cylindrical roller bearings are radial rolling bearings with cylindrical rollers. The internal structure of a cylindrical roller bearing uses rollers arranged in parallel, with spacers or spacers between the rollers. The bearing cage is a spacer structure that keeps the individual rolling elements of the rolling element bearing evenly spaced around the raceway.

[0003] The conventional cylindrical roller bearings currently used in the prior art have a large torque, a large contact area between the roller and the cage, and relatively large friction, which will shorten the life of the entire bearing. Among the disclosed technologies, there is a cage designed to have a pocket window beam with a bent shape. However, in actual use, the contact area between the upper and lower ends of the cage and the upper and lower end faces of the roller is large, and there is a problem of insufficient lubrication. This increases the friction between the roller and the cage and makes it very easy to heat up. The roller is also prone to axial movement, resulting in unstable contact between the roller and the upper and lower ends of the cage. This can easily cause irregular axial impacts on the cage, causing the cage's structural strength to drop rapidly, affecting the cage and even the normal use of the bearing. In addition, the existing bent window beam has an inclined surface at the bend, which is very prone to stress concentration. The window beam is at a very high risk of breaking when it is constantly in contact with the roller and is squeezed and impacted by the roller.

[0004] This shows that the existing technology still has certain defects. Utility Model Content

[0005] The present application provides a bow-shaped welding retainer to solve at least one of the above technical problems.

[0006] The technical solutions adopted in this application are:

[0007] A bow-shaped welded retainer, comprising a coaxially arranged first ring beam, a second ring beam, and a plurality of bent window beams disposed between the first ring beam and the second ring beam, wherein pockets for mounting a rotating body are formed between two adjacent bent window beams and the first ring beam and the second ring beam; the bent window beam comprises a supporting portion and a first portion and a second portion symmetrically disposed at both ends of the supporting portion, the first portion being connected to the first ring beam, the second portion being connected to the second ring beam, and a first oil groove being provided at the connection between the first ring beam and the first portion and at the connection between the second ring beam and the second portion;

[0008] The first part and the second part are provided with a first pressure slope surface that contacts and cooperates with the rotating body on the side facing the pocket hole, and the support part is provided with a second pressure slope surface that contacts and cooperates with the rotating body on the side facing the pocket hole. The support part is also provided with an oil-passing inclined surface on the side facing the pocket hole, and there is an oil-passing gap between the oil-passing inclined surface and the rotating body.

[0009] As a preferred embodiment of the present application, the supporting portion includes a straight portion and bent portions at both ends of the straight portion, the bent portion is provided with the second pressure slope surface facing the pocket hole, and the straight portion is provided with the oil-passing slope surface facing the pocket hole.

[0010] As a preferred embodiment of the present application, a first fitting portion is provided at one end of the first part close to the first ring beam, and a second fitting portion is provided at one end of the second part close to the second ring beam, and the first fitting portion and the second fitting portion have shapes that are adapted to the shape of the end portion of the rotating body.

[0011] As a preferred embodiment of the present application, along the radial direction, the projection width of the support portion is smaller than the projection widths of the first portion and the second portion.

[0012] As a preferred embodiment of the present application, the first pressure slope surface has a first contact area that contacts and cooperates with the rotating body, and the second pressure slope surface has a second contact area that contacts and cooperates with the rotating body, and the second contact area is smaller than the first contact area.

[0013] As a preferred embodiment of the present application, the first pressure slope surface and the second pressure slope surface are provided with a wear-resistant coating.

[0014] As a preferred embodiment of the present application, a wear-resistant coating is provided on the side of the first ring beam and the second ring beam facing the pocket.

[0015] As a preferred embodiment of the present application, one or more second oil grooves are provided on the side of the first ring beam and the second ring beam away from the pocket.

[0016] As a preferred embodiment of the present application, in the radial direction, the bent window beam protrudes toward the inner side of the retaining frame or the bent window beam protrudes toward the outer side of the retaining frame.

[0017] As a preferred embodiment of the present application, a first arcuate transition surface is provided on the side of the connection between the bent portion and the first part and the second part facing the pocket, and a second arcuate transition surface is provided on the side of the bent portion facing the inside of the bow-shaped welding retainer and the side away from the inside of the bow-shaped welding retainer.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0019] 1. Compared with the traditional retainer, the friction contact area between the rotating body and the retainer is greatly reduced. The setting of the first oil groove, the second oil groove and the oil slope allows the lubricating grease to flow easily and smoothly between the rotating body, the pocket and the inner and outer rings of the bearing, thereby reducing the friction between the rotating body and the retainer and the inner and outer rings of the bearing. It is beneficial to reduce the wear of the rotating body and the retainer, extend the service life of the rotating body and the retainer, and also help to reduce the irregular movement of the rotating body and the retainer when the bearing rotates, maintain the stability of the rotation path of the rotating body to ensure the stability of the shaft rotation, and also help to reduce the noise generated during the rotation of the bearing.

[0020] 2. The oil-passing gap between the oil-passing inclined surface and the rotating body presents a structural design with a larger opening toward the inside of the cage and a smaller opening away from the inside of the cage. This arrangement can meet the needs of lubricating grease flow while maximally concentrating the lubricating grease on the inside of the cage to improve the utilization rate of the lubricating grease, which can not only ensure the lubrication effect but also reduce the loss of lubricating grease. Moreover, this arrangement is also conducive to ensuring the structural strength of the middle support part of the bent window beam, and further ensure the support and limiting effect of the cage on the rotating body.

[0021] 3. By adopting the bow-shaped welded retainer structure in the present application, the fluidity of lubricating grease between the rotating body, retainer, inner and outer rings of the bearing can be improved, thereby improving the lubrication effect of the retainer, reducing the friction loss of the rotating body, retainer, inner and outer rings of the bearing and lubricating grease, and improving the durability and safety of the rotating body, retainer and the entire bearing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of a bow-shaped welded cage in an example;

[0024] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A;

[0025] Figure 3 A schematic diagram of the structure of the rotating body and the arched welding cage in an example;

[0026] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part B.

[0027] List of parts and reference numerals:

[0028] 11 first ring beam, 12 second ring beam, 13 first oil trough, 14 pocket;

[0029] 2 bent window beam, 21 supporting portion, 211 straight portion, 2111 oil-passing inclined surface, 212 bent portion, 2121 second pressure slope surface, 2122 first arc-shaped transition surface, 2123 second arc-shaped transition surface, 22 first portion, 221 first matching portion, 23 second portion, 231 second matching portion, 24 first pressure slope surface, 25 oil-passing gap;

[0030] 3 rotating bodies. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0032] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0033] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application 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. Therefore, they cannot be understood as limitations on the present application.

[0034] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] Reference Figure 1-Figure 4 As shown, the present application discloses an arched welded retainer, which mainly includes a first ring beam 11 and a second ring beam 12 arranged coaxially, and a plurality of bent window beams 2 arranged between the first ring beam 11 and the second ring beam 12. Pockets 14 for mounting the rotating body 3 are enclosed between two adjacent bent window beams 2 and the first ring beam 11 and the second ring beam 12. Figure 2 As shown, the bent window beam 2 includes a supporting portion 21 and a first portion 22 and a second portion 23 symmetrically arranged at both ends of the supporting portion 21, the first portion 22 is connected to the first ring beam 11, and the second portion 23 is connected to the second ring beam 12, and a first oil groove 13 is provided at the connection between the first ring beam 11 and the first portion 22 and the connection between the second ring beam 12 and the second portion 23, and a first pressure slope 24 that contacts and cooperates with the rotating body 3 is provided on the side of the first portion 22 and the second portion 23 facing the pocket hole 14, and a second pressure slope 2121 that contacts and cooperates with the rotating body 3 is provided on the side of the supporting portion 21 facing the pocket hole 14, and an oil-passing inclined surface 2111 is also provided on the side of the supporting portion 21 facing the pocket hole 14, and an oil-passing inclined surface 2111 and an oil-passing gap 25 are provided between the oil-passing inclined surface 2111 and the rotating body 3.

[0037] In the above scheme, when the rotating body 3 is installed in the pocket 14, the side surface of the rotating body 3 contacts the aforementioned first pressure slope 24 and second pressure slope 2121. When the rotating body 3 rotates, friction only occurs between the first pressure slope 24, the second pressure slope 2121 and the first ring beam 11 and the second ring beam 12. Compared with the traditional retaining frame, the friction contact area between the rotating body 3 and the retaining frame is greatly reduced. Through the setting of the first oil groove 13 and the oil slope 2111, the lubricating grease can flow easily and smoothly between the rotating body 3, the pocket 14 and the inner and outer rings of the bearing, thereby reducing the friction between the rotating body 3 and the retaining frame and the inner and outer rings of the bearing. This is beneficial to reducing the wear of the rotating body 3 and the retaining frame, extending the service life of the rotating body 3 and the retaining frame, and reducing the irregular movement of the rotating body 3 and the retaining frame when the bearing rotates, maintaining the stability of the rotation path of the rotating body 3 to ensure the stability of the shaft rotation, and reducing the noise generated during the rotation of the bearing.

[0038] It should also be noted that the present application does not specifically limit the bending direction of the bent window beam 2. It can adopt a structure that bends toward the inside of the cage as in the above example, or it can adopt a structure that bends toward the outside of the cage to facilitate use with the inner and outer bearing sleeves. That is, the support portion 21 can protrude toward the inside of the cage or toward the outside of the cage. This arrangement can adapt to the use needs of bearings of different specifications and improve the versatility of the cage in the present application.

[0039] In one example, referring to Figure 2 and Figure 4 As shown, the support portion 21 includes a straight portion 211 and bent portions 212 at both ends of the straight portion 211. The bent portion 212 is provided with the aforementioned second pressure slope 2121 on the side facing the pocket 14, and the straight portion 211 is provided with the aforementioned oil-passing inclined surface 2111 on the side facing the pocket 14. As a preferred embodiment of the present application, continue to refer to Figure 4As shown, the oil-passing gap 25 between the oil-passing slope 2111 and the rotating body 3 presents a structural design with a larger opening toward the inside of the retainer and a smaller opening away from the inside of the retainer. This arrangement not only meets the flow requirements of the lubricating grease, but also helps to maximize the concentration of the lubricating grease on the inside of the retainer to improve the utilization rate of the lubricating grease. It can not only ensure the lubrication effect but also reduce the loss of the lubricating grease. Moreover, this arrangement is also conducive to ensuring the structural strength of the middle support portion 21 of the bent window beam 2, and further ensures the supporting and limiting effect of the retainer on the rotating body 3. It should be noted here that the above-mentioned oil-passing slope 2111 and the arrangement of the oil-passing slope 2111 are only a preferred embodiment of the present application. The structural arrangement of the support portion 21 facing the pocket 14 is not limited to the above-mentioned method. It can also continue to adopt the opening of the first oil-passing groove 13, oil-passing hole or other more different structural arrangements. The present application does not make specific limitations on this.

[0040] Continue to refer to Figure 2 and Figure 4 As shown, the first portion 22 is provided with a first fitting portion 221 at one end close to the first ring beam 11, and the second portion 23 is provided with a second fitting portion 231 at one end close to the second ring beam 12. The first fitting portion 221 and the second fitting portion 231 have shapes that adapt to the shape of the end of the rotating body 3. This arrangement can effectively improve the limiting and fixing effect of the pocket 14 on the rotating body 3 and reduce the unstable movement of the rotating body 3 during the rotation process. At the same time, continue to refer to Figure 2 and Figure 4 As shown, preferably, the first mating portion 221 and the second mating portion 231 adopt an arc-shaped structure, that is, the connection between the first pressure slope 24 and the first ring beam 11 and the second ring beam 12 adopts an arc-shaped transition. This arrangement can not only meet the need of the pocket 14 to limit the rotating body 3, but also avoid the stress concentration at the connection between the first part 22, the second part 23 and the first ring beam 11 and the second ring beam 12 caused by the setting of the first pressure slope 24, which is beneficial to ensure the structural strength of the entire retainer. It should also be noted here that the structure and arrangement of the above-mentioned first mating portion 221 and the second mating portion 231 are only an example of this application. The arrangement of the first mating portion 221 and the second mating portion 231 in this application is not limited to the above-mentioned example, and this application does not make specific restrictions on this.

[0041] As a preferred embodiment of this application, refer to Figure 1-Figure 4As shown, radially, the projection width of the support portion 21 is smaller than the projection width of the first portion 22 and the second portion 23. This arrangement is beneficial to ensuring the connection strength between the bent window beam 2 and the first ring beam 11 and the second ring beam 12, thereby ensuring the stability of the entire retaining frame structure, and further ensuring the stability of the rotation path of the rotating body 3, and ensuring the long-term stable operation of the bearing. The first pressure slope 24 has a first contact area that contacts and cooperates with the rotating body 3, and the second pressure slope 2121 has a second contact area that contacts and cooperates with the rotating body 3, and the second contact area is smaller than the first contact area. This arrangement can reduce the contact area between the position most susceptible to wear near the middle of the rotating body 3 and the support portion 21 as much as possible, which can not only ensure that sufficient limiting support is provided for the rotating body 3, but also reasonably distribute the distribution of the contact area while reducing the friction contact area, so that the rotating body 3 reduces the torque during rotation, can operate stably, and further extend the service life of the retaining frame. Preferably, the first pressure slope 24, the second pressure slope 2121, and the first ring beam 11 and the second ring beam 12 on the side facing the pocket 14 are all provided with a wear-resistant coating. By providing a wear-resistant coating, the wear resistance of the contact position between the retaining frame and the rotating body 3 is further improved, thereby reducing wear. It should also be noted here that the above are only some preferred embodiments of the present application. The structure of the support part 21, the first pressure slope 24, the second pressure slope 2121, and the surface treatment of the first ring beam 11 and the second ring beam 12 on the side facing the pocket 14 in the present application are not limited to the above-mentioned embodiments, and the present application does not make specific limitations on this.

[0042] As a preferred embodiment of this application, continue to refer to Figure 2 and Figure 4 As shown, a first arcuate transition surface 2122 is provided at the junction of the bent portion 212 with the first portion 22 and the second portion 23 on the side facing the pocket 14. Second arcuate transition surfaces 2123 are provided on the side of the bent portion 212 facing the interior of the arched welded retainer and on the side facing away from the interior of the arched welded retainer. This arrangement can effectively disperse stress and prevent stress concentration on the bent portion 212, which could cause stress damage to the bent portion 212.

[0043] As a preferred embodiment of the present application, one or more second oil grooves are provided on the side of the first and second ring beams 11, 12 away from the pockets 14. Preferably, the plurality of second oil grooves are evenly spaced around the circumference of the first and second ring beams 11, 12, and the opening size of the second oil grooves is preferably smaller than the opening size of the first oil grooves 13. The provision of the second oil grooves further facilitates the flow of lubricating grease, thereby further improving the lubrication performance of the bow-shaped welded retainer structure of the present application. Furthermore, this configuration can reduce material and weight.

[0044] In summary, by adopting the bow-shaped welded retainer structure in the present application, the fluidity of the lubricating grease between the rotating body 3, the retainer, and the inner and outer rings of the bearing can be improved, thereby improving the lubrication effect of the retainer, reducing the friction loss of the rotating body 3, the retainer, the inner and outer rings of the bearing and the lubricating grease, and can also effectively reduce material and weight, further reduce the impact loss between the various parts during the use of the bearing, and improve the durability and safety of the rotating body 3, the retainer and the entire bearing structure.

[0045] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0046] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0047] 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 bow-shaped welding cage, characterized in that: The invention comprises a coaxially arranged first ring beam, a second ring beam, and a plurality of bent window beams arranged between the first ring beam and the second ring beam, wherein pockets for mounting a rotating body are formed between two adjacent bent window beams and the first ring beam and the second ring beam; the bent window beam comprises a supporting portion and a first portion and a second portion symmetrically arranged at both ends of the supporting portion; a first oil passage groove is provided at the connection between the first ring beam and the first portion and at the connection between the second ring beam and the second portion; The first part and the second part are provided with a first pressure slope surface on the side facing the pocket hole, the support part is provided with a second pressure slope surface on the side facing the pocket hole, and the support part is also provided with an oil-passing inclined surface on the side facing the pocket hole, and an oil-passing gap is provided between the oil-passing inclined surface and the rotating body.

2. The bow-shaped welding retainer according to claim 1, characterized in that: The supporting portion includes a straight portion and bent portions at both ends of the straight portion, the bent portion is provided with the second pressure slope surface on the side facing the pocket, and the straight portion is provided with the oil-passing slope surface on the side facing the pocket.

3. The bow-shaped welding retainer according to claim 1, characterized in that: A first fitting portion is provided at one end of the first part close to the first ring beam, and a second fitting portion is provided at one end of the second part close to the second ring beam. The first fitting portion and the second fitting portion have shapes that are adapted to the shape of the end of the rotating body.

4. The bow-shaped welding retainer according to claim 1, characterized in that: In the radial direction, the projection width of the support portion is smaller than the projection widths of the first portion and the second portion.

5. The bow-shaped welding retainer according to claim 1, characterized in that: The first pressure slope surface has a first contact area that contacts and cooperates with the rotating body, and the second pressure slope surface has a second contact area that contacts and cooperates with the rotating body, and the second contact area is smaller than the first contact area.

6. The bow-shaped welding retainer according to claim 1, characterized in that: The first pressure slope surface and the second pressure slope surface are provided with a wear-resistant coating.

7. The bow-shaped welding retainer according to claim 1, characterized in that: A wear-resistant coating is provided on one side of the first ring beam and the second ring beam facing the pocket.

8. The bow-shaped welding retainer according to claim 1, characterized in that: One or more second oil passage grooves are provided on a side of the first ring beam and the second ring beam away from the pocket.

9. The bow-shaped welding retainer according to claim 1, characterized in that: In the radial direction, the bent window beam protrudes toward the inner side of the retaining frame or the bent window beam protrudes toward the outer side of the retaining frame.

10. The bow-shaped welding retainer according to claim 2, characterized in that: A first arcuate transition surface is provided on the side of the connection between the bent portion and the first and second portions facing the pocket hole, and a second arcuate transition surface is provided on the side of the bent portion facing the inside of the bow-shaped welding retainer and on the side away from the inside of the bow-shaped welding retainer.

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