Double-locking-point cylindrical roller bearing retainer

Abstract

The utility model discloses a double-locking-point cylindrical roller bearing retainer, which solves the problem that a window beam of the retainer is easy to generate fatigue fracture under the condition of high speed or high load, and comprises two end rings and window beams which are connected with the two end rings and are circumferentially and uniformly distributed, and pockets for mounting cylindrical rollers are formed between the adjacent window beams. First locking point elements are arranged on the inner walls of the upper sides of the pockets, opposite second locking point elements are arranged on the inner walls of the lower sides of the pockets, and the first locking point elements and the second locking point elements are arranged on the inner walls of the upper sides and the inner walls of the lower sides of the pockets correspondingly and matched with first matching grooves and second matching grooves in the cylindrical rollers, so that accurate positioning and restraining of the cylindrical rollers are achieved; according to the cage, collision between the rollers and the window beam in the operation process is reduced, so that stress concentration caused by collision is avoided, the fatigue life of the cage is prolonged, and due to the fact that the strength of the cage does not need to be enhanced by thickening the window beam, light weight of the cage is achieved through the design.

Description

Technical Field

[0001] This application belongs to the field of bearing cages, and particularly relates to a double-locking point cylindrical roller bearing cage. Background Technology

[0002] Fatigue fracture of cylindrical cages has become a prominent problem in bearing failure, especially in medium and large spindle bearings. During bearing operation, the revolution speed of the rolling elements and the rotation speed of the cage are often difficult to perfectly match, resulting in constant dynamic collisions between them. These collisions generate significant impact forces, which are particularly pronounced under high-speed or high-load conditions. This leads to excessive stress in localized areas of the cage (such as corners of the cage beams). Long-term stress concentration accelerates material fatigue damage, making the cage more susceptible to fatigue fracture in these areas. Therefore, to extend bearing life, current designs use thicker cage beams to enhance strength. While this can improve the cage's resistance to fatigue fracture to some extent, thicker beams also increase the overall weight of the cage. Thicker beams require more material, increasing manufacturing costs. Therefore, existing technologies require further improvement. Utility Model Content

[0003] This invention provides a double-locking point cylindrical roller bearing cage, which solves the problem of fatigue fracture that easily occurs in window beams under high-speed or high-load conditions.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A double-locking cylindrical roller bearing cage includes two end rings and a window beam connecting the two end rings in a circumferentially evenly arranged manner. Adjacent window beams form pockets for mounting cylindrical rollers. A first locking element is provided on the upper inner wall of the pocket, and a corresponding second locking element is provided on the lower inner wall of the pocket. A first mating groove is provided at the center of the upper side of the cylindrical roller, and a second mating groove is provided at the center of the lower side. The first and second mating grooves respectively engage with the first and second locking elements to confine the cylindrical roller to a predetermined position for rotation, ensuring that it does not collide with the window beam forming the pocket during operation, thereby extending the service life of the cage.

[0006] This utility model discloses a double-locking-point cylindrical roller bearing cage. By setting a first locking point element and a second locking point element on the upper and lower inner walls of the pocket, respectively, and engaging with the first and second mating grooves on the cylindrical rollers, it achieves precise positioning and constraint of the cylindrical rollers. This reduces collisions between the rollers and the frame beam during operation, thereby avoiding stress concentration caused by collisions and extending the fatigue life of the cage. Since there is no need to thicken the frame beam to enhance the cage's strength, this design achieves cage lightweighting. The double-locking-point design ensures stable rotation of the cylindrical rollers in the predetermined position, reducing vibration and noise caused by positional deviation or wobbling, and improving the bearing's operational stability and reliability. Compared to the traditional thickened frame beam design, this design has a simpler manufacturing process and lower cost. Furthermore, by reducing unnecessary material usage, it conforms to the concept of energy conservation and environmental protection, effectively solving the fatigue fracture problem that traditional cages are prone to under high-speed or high-load conditions, while simultaneously achieving the goals of lightweighting, improved operational stability, and cost reduction.

[0007] In a preferred embodiment, the first locking element and the second locking element are integrally formed with the retainer, and the thickness of the first locking element and the second locking element is greater than the thickness of the window beam.

[0008] The integral structure of the locking element and the cage can better disperse and absorb impact force when subjected to roller impact, reducing the risk of stress concentration and fracture. The thickness of the locking element is greater than the thickness of the window beam, that is, the contact point between the roller and the cage is locally reinforced, which can significantly improve the strength of vulnerable areas without increasing the weight and material cost of the cage as a whole.

[0009] In a preferred implementation, the length of the second locking element is set to the vertical distance between the lower surface of the cylindrical roller and the bottom of the pocket when the upper surface of the roller is in contact with the top of the pocket, and the length of the first locking element is greater than that of the second locking element.

[0010] In a preferred implementation, the first locking element and the second locking element are detachably connected to the retainer.

[0011] When the locking element needs to be replaced due to long-term use or accidental damage, it is not necessary to disassemble or replace the entire cage; only the damaged locking element needs to be replaced.

[0012] In a preferred implementation, the end ring is provided with a plug-in interface, and the first locking element / second locking element is plugged into the plug-in interface.

[0013] In a preferred implementation, the first locking element and the second locking element are made of polytetrafluoroethylene.

[0014] In a preferred implementation, the diameter of the first mating groove / second mating groove is greater than the diameter of the first locking element / second locking element, and the first mating groove and the second mating groove are filled with lubricating grease.

[0015] In a preferred embodiment, the first locking element / second locking element has an oil groove on the side facing the first mating groove / second mating groove, and the oil groove and the mating groove form an oil storage space to provide continuous lubrication for the contact surface between the locking element and the mating groove.

[0016] In a preferred embodiment, both ends of the cage are provided with flanges facing away from the center, and the first locking element and the second locking element are located on the flanges. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain this application and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic three-dimensional structural diagram of one embodiment of the double-locking point cylindrical roller bearing cage of this application is shown;

[0019] Figure 2 The diagram illustrates a schematic embodiment of the cylindrical roller bearing cage mounting cylindrical rollers according to this application.

[0020] Figure 3 The diagram illustrates a schematic structural representation of a locking element plug-in connection retainer according to this application.

[0021] Figure 4 A schematic diagram illustrating one embodiment of the oil tank of this application is shown.

[0022] Label Explanation:

[0023] 10-End ring; 100-Flanged edge; 101-Insertion interface; 11-Window beam; 12-Pocket; 13-First locking element; 130-Oil groove; 14-Second locking element; 2-Cylindrical roller; 20-First mating groove; 21-Second mating groove. Detailed Implementation

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit and scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0025] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In this utility model, unless otherwise expressly specified and limited, the first feature being "upper" or "lower" than the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0028] The present invention will now be described with reference to the accompanying drawings.

[0029] The specific solution adopted is as follows:

[0030] like Figure 1-4 As shown, this utility model provides a double-locking cylindrical roller bearing cage, including two end rings 10 and a window beam 11 that connects the two end rings and is evenly arranged in a circle. Adjacent window beams form pockets 12 for mounting cylindrical rollers. The upper inner wall of the pocket is provided with a first locking element 13, and the lower inner wall of the pocket is provided with a corresponding second locking element 14. The upper center of the cylindrical roller 2 is provided with a first mating groove 20, and the lower center is provided with a second mating groove 21. The first mating groove and the second mating groove respectively cooperate with the first locking element and the second locking element to limit the cylindrical roller to rotate in a predetermined position, ensuring that it will not collide with the window beam forming the pocket during operation, thereby extending the service life of the cage.

[0031] The above structure, by setting the first locking element 13 and the second locking element 14 on the upper and lower inner walls of the pocket respectively, and cooperating with the first mating groove 20 and the second mating groove 21 on the cylindrical roller, achieves precise positioning and constraint of the cylindrical roller, reduces the collision between the roller and the window beam during operation, thereby avoiding stress concentration caused by the collision and extending the fatigue life of the cage. Since there is no need to thicken the window beam to enhance the strength of the cage, this design achieves the lightweighting of the cage. The double locking point design ensures that the cylindrical roller rotates stably in the predetermined position, reduces vibration and noise caused by position deviation or wobbling, and improves the running stability and reliability of the bearing. Compared with the traditional thickened window beam design, the manufacturing process of this design is simpler and the cost is lower. At the same time, by reducing unnecessary material use, it conforms to the concept of energy conservation and environmental protection, and can effectively solve the fatigue fracture problem that traditional cages are prone to under high speed or high load conditions, while achieving the goals of lightweighting, improving running stability and reducing costs.

[0032] In a preferred embodiment of this application, the first and second locking elements are integrally formed with the cage, and the thickness of the first and second locking elements is greater than the thickness of the window sill. The integral formation of the locking elements with the cage results in a very strong connection. This integrated structure can better disperse and absorb impact forces when subjected to roller impacts, reducing the risk of stress concentration and breakage. The thickness of the locking elements being greater than the thickness of the window sill means that local reinforcement is provided at the critical points, namely the contact points between the rollers and the cage, which significantly improves the strength of vulnerable areas without significantly increasing the overall weight and material cost of the cage. When the rollers impact the locking elements, the thickness of the locking points provides additional resistance to bending and shearing, enabling them to better resist the impact forces generated by the rollers under high-speed or high-load conditions, thereby extending the service life of the cage.

[0033] Furthermore, the shapes of the first and second locking elements can be flexibly selected according to specific application scenarios and design requirements, including but not limited to square, cylindrical, frustum, or other shapes.

[0034] As a preferred embodiment of the implementation method, since the locking element and the cage are integrally formed, the cylindrical roller cannot be installed horizontally in the pocket. Therefore, the length of the second locking element 14 is set to the vertical distance between its lower surface and the bottom of the pocket when the upper surface of the cylindrical roller is in contact with the top of the pocket. The length of the first locking element 13 is greater than that of the second locking element. During the installation of the cylindrical roller, the first mating groove on the upper end face of the roller is first made to mate with the first locking element, and the upper end face of the roller is made to abut against the upper end of the pocket, so that the roller descends vertically. As the roller descends, the second locking element can smoothly enter the second mating groove, while the first locking element, due to its longer length, remains in the first mating groove and will not detach. This simplifies the installation process of the roller and reduces the installation difficulty and time.

[0035] In a preferred embodiment of this application, the first locking element and the second locking element are designed as a detachable connection retainer. When the locking element needs to be replaced due to long-term use or accidental damage, it is not necessary to disassemble or replace the entire retainer; only the damaged locking element needs to be replaced. To achieve the detachable connection of the locking elements, various connection methods can be adopted. In a preferred embodiment, the end ring is provided with a plug-in interface 101, and the first locking element / second locking element is plugged into the plug-in interface. Other detachable connections such as threaded connections, plug-in connections, and pin connections can also be selected.

[0036] Furthermore, the first locking element 13 and the second locking element 14 are made of polytetrafluoroethylene (PTFE). PTFE has an extremely low coefficient of friction and excellent wear resistance, resulting in very little wear on the locking elements during long-term contact and friction between the roller and the locking elements. This helps maintain the precision and stability of the locking elements, extending their service life. Simultaneously, PTFE material has a certain elastic deformation capacity, allowing the locking elements to undergo slight elastic deformation during contact between the roller and the locking elements to better adapt to changes in the shape and position of the roller. This helps reduce impact and vibration between the roller and the locking elements, improving the smoothness and reliability of the bearing.

[0037] In a preferred embodiment of this application, the diameter of the first mating groove 20 / second mating groove 21 is larger than the diameter of the first locking element 13 / second locking element 14, providing rotational margin and allowing the locking element to rotate freely within the mating groove, reducing friction and resistance caused by tight fit. The mating groove is filled with lubricating grease, which can form a protective film, reduce the coefficient of friction, ensure the continuous and efficient operation of the system, and extend the service life of the components.

[0038] Furthermore, the first locking element / second locking element has an oil groove on the side facing the first mating groove / second mating groove. The oil groove 130 and the mating groove form a relatively closed oil storage space, which increases the oil storage capacity after the two are mated and can effectively prevent the lubricating oil from being thrown off when the locking element moves, thereby improving the utilization rate of the lubricating oil. During the relative movement between the locking element and the mating groove, the lubricating oil in the oil storage space will gradually reach the contact surface through capillary action, extrusion and other means, forming a thin lubricating oil film that continuously provides lubrication for the contact surface between the locking element and the mating groove, reducing the coefficient of friction, reducing wear, and extending the service life of the component.

[0039] As a preferred embodiment of this application, both ends of the retainer are provided with flanges 100 facing away from the center. As part of the retainer structure, the flanges can increase the overall strength and rigidity of the retainer and effectively increase the radial support area of ​​the locking element, making its diameter larger than the thickness of the window beam, thereby improving the stability of the locking element during operation.

[0040] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0041] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cage for a double-locking cylindrical roller bearing, characterized in that, The device includes two end rings and window beams that are evenly arranged in a circle connecting the two end rings. Adjacent window beams form pockets for installing cylindrical rollers. The upper inner wall of the pocket is provided with a first locking element, and the lower inner wall of the pocket is provided with a corresponding second locking element. The upper center of the cylindrical roller is provided with a first mating groove, and the lower center is provided with a second mating groove. The first and second mating grooves cooperate with the first and second locking elements respectively to limit the cylindrical roller to rotate in a predetermined position, ensuring that it will not collide with the window beams forming the pockets during operation, thereby extending the service life of the retainer.

2. The double-locking point cylindrical roller bearing cage according to claim 1, characterized in that, The first locking element and the second locking element are integrally formed with the retainer, and the thickness of the first locking element and the second locking element is greater than the thickness of the window beam.

3. The double-locking point cylindrical roller bearing cage according to claim 2, characterized in that, The length of the second locking element is set to the vertical distance between its lower surface and the bottom of the pocket when the upper surface of the cylindrical roller is in contact with the top of the pocket, and the length of the first locking element is greater than that of the second locking element.

4. The double-locking point cylindrical roller bearing cage according to claim 1, characterized in that, The first locking element and the second locking element are detachably connected to the retainer.

5. The double-locking point cylindrical roller bearing cage according to claim 4, characterized in that, The end ring is provided with a plug-in interface, and the first locking element / second locking element is plugged into the plug-in interface.

6. The double-locking point cylindrical roller bearing cage according to claim 4, characterized in that, The first locking element and the second locking element are made of polytetrafluoroethylene.

7. The double-locking point cylindrical roller bearing cage according to claim 1, characterized in that, The diameter of the first mating groove / second mating groove is greater than the diameter of the first locking element / second locking element, and the first mating groove and the second mating groove are filled with lubricating grease.

8. The double-locking point cylindrical roller bearing cage according to claim 3, characterized in that, The first locking element / second locking element has an oil groove on the side facing the first mating groove / second mating groove. The oil groove and the mating groove form an oil storage space to provide continuous lubrication for the contact surface between the locking element and the mating groove.

9. The double-locking point cylindrical roller bearing cage according to claim 1, characterized in that, Both ends of the cage are provided with flanges facing away from the center, and the first locking element and the second locking element are located on the flanges.

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