Double-locking-point cylindrical roller bearing retainer

Abstract

The double-locking-point cylindrical roller bearing retainer comprises two end rings and window beams which are connected with the two end rings and are circumferentially and uniformly distributed, 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, and opposite second locking point elements are arranged on the inner walls of the lower sides of the pockets. The first matching groove and the second matching groove are matched with the first locking point element and the second locking point element respectively, the cylindrical roller is limited to rotate at the preset position, direct collision between the roller and a window beam forming a pocket hole in the running process is reduced, and the thickness of the first locking point element and the second locking point element is larger than that of the window beam. The contact part of the cylindrical roller and the retainer is locally enhanced, so that the stress concentration of the roller and the retainer at the key contact points can be reduced, the risk of fatigue damage is reduced, and light weight can be realized by optimizing the structure of the window beam and reducing unnecessary material use.

Description

Technical Field

[0001] The present application belongs to the field of bearing retainers, and in particular relates to a double-locking point cylindrical roller bearing retainer. Background Art

[0002] Fatigue fracture of cylindrical cages has become a prominent issue in bearing failure, particularly in medium- and large-sized spindle bearings. During bearing operation, the orbital speed of the rolling elements and the rotational speed of the cage often struggle to perfectly match, leading to dynamic collisions between the two. This collision generates significant forces, particularly at high speeds or high loads. This force can lead to excessive stress in localized areas of the cage (such as the corners of the pocket lintel). Long-term stress concentration accelerates material fatigue damage, making the cage more susceptible to fatigue fracture in these areas. Therefore, to extend the service life of bearings, existing designs often employ thicker overall sills to enhance their strength. While this improves the cage's resistance to fatigue fracture to a certain extent, thicker sills also increase the overall weight of the cage. Thicker sills require more material, increasing manufacturing costs. Therefore, the existing technology requires further improvement and advancement. Summary of the Invention

[0003] The present invention provides a double-locking-point cylindrical roller bearing cage to at least solve or alleviate one or more technical problems in the prior art, or at least provide a beneficial option.

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

[0005] A double-locking-point cylindrical roller bearing retainer comprises two end rings and a window beam connecting the two end rings and arranged evenly in a circumference, pockets for mounting cylindrical rollers are formed between adjacent window beams, a first locking point element is provided on the upper inner wall of the pocket, and a second locking point element is provided on the lower inner wall of the pocket, the thickness of the first locking point element and the second locking point element being greater than the thickness of the window beam; a first matching groove is provided at the upper center of the cylindrical roller, and a second matching groove is provided at the lower center, the first matching groove and the second matching groove respectively cooperate with the first locking point element and the second locking point element to limit the cylindrical roller to rotate in a predetermined position, ensuring that it will not collide with the window beam constituting the pocket during operation, so as to extend the service life of the retainer.

[0006] In a preferred implementation, the first locking point element and the second locking point element are integrally formed with the retaining frame, the length of the first locking point element is greater than that of the second locking point element, and the length of the second locking point element is set to be less than or equal to the vertical distance between its lower surface and the lower inner wall of the pocket when the upper surface of the cylindrical roller is in contact with the upper inner wall of the pocket.

[0007] In a preferred implementation, the first locking point element and the second locking point element are detachably connected to a retaining frame.

[0008] In a preferred implementation, the first locking point element / the second locking point element includes an outer elastic plastic part that can effectively absorb and disperse the impact force generated when the roller is running, and a monitoring part wrapped inside the elastic plastic part to monitor the roller operation parameters.

[0009] In a preferred implementation, the monitoring component can monitor the ambient temperature of the roller operation / monitor the number or force of collisions between the roller and the elastic plastic component.

[0010] In a preferred implementation, the diameter of the first mating groove / second mating groove is larger than the diameter of the first locking point element / second locking point element, and the groove depth of the first mating groove and the second mating groove is larger than the length of the first locking point element / second locking point element.

[0011] In a preferred implementation, an oil groove is provided on the side of the first locking point element / the second locking point element facing the first mating groove / the second mating groove, and an oil storage space is formed between the oil groove and the mating groove to provide continuous lubrication for the contact surface between the locking point element and the mating groove.

[0012] In a preferred implementation, the window beam is provided in a thin-film form and multiple sheets are arranged at intervals along the radial direction to enhance the load-bearing performance.

[0013] In a preferred implementation, the window beam is provided with at least one oil hole and debris interceptors are provided between adjacent thin-film window beams to maintain good lubrication and cleanliness inside the bearing.

[0014] In a preferred implementation, both end rings of the retaining frame are provided with flanges facing away from the center of the circle, and the first locking point element and the second locking point element are provided on the flanges.

[0015] The above structure has the following beneficial effects:

[0016] 1. The double-locking-point cylindrical roller bearing retainer of the present application is configured such that the cylindrical roller is limited to rotate at a predetermined position by the first mating groove and the second mating groove cooperating with the first locking point element and the second locking point element respectively, thereby reducing direct collision of the roller with the window beam constituting the pocket during operation, and improving the bearing's load-bearing capacity by locally reinforcing the contact portion between the roller and the retainer. While keeping the retainer lightweight, the service life of the retainer and the bearing is extended.

[0017] 2. The double-locking-point cylindrical roller bearing retainer of the present application, the elastic plastic part on the outer layer of the locking-point element can effectively absorb and disperse the impact force generated when the roller is running, thereby reducing the collision and wear between the roller and the retainer, and extending the service life of the bearing. The monitoring part wrapped inside the elastic plastic part can monitor the operating parameters of the roller in real time, such as speed, temperature, vibration, etc., providing important data support for the maintenance and management of the bearing. The real-time monitoring function can detect potential failures of the bearing in advance, and avoid equipment shutdown or safety accidents caused by sudden failures.

[0018] 3. The double-locking-point cylindrical roller bearing retainer of the present application has an oil groove arranged on the side of the locking element facing the mating groove. When installed in the mating groove, the grease in the oil groove will be subjected to a certain pressure and thus pressed onto the contact surface between the locking element and the mating groove, thereby ensuring that the contact surface between the locking element and the mating groove can be continuously lubricated, effectively reducing friction and wear and extending the service life of the component.

[0019] 4. The double-locking-point cylindrical roller bearing retainer of the present application has a thin-film window beam setting, and debris interceptors are set between adjacent thin-film window beams, which can effectively intercept the iron foam, debris generated inside the bearing and impurities invading from the outside. After these iron foam, debris and impurities are intercepted, they can be prevented from entering the bearing's lubrication system, thereby maintaining the cleanliness and lubrication performance of the lubricating oil, which helps to reduce bearing friction and wear and improve the bearing's operating efficiency and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a schematic embodiment of a double-locking-point cylindrical roller bearing cage of the present application is depicted;

[0022] Figure 2 A schematic structural diagram of a schematic implementation scheme of a double-locking-point cylindrical roller bearing cage mounted with cylindrical rollers according to the present application is depicted;

[0023] Figure 3 A schematic structural diagram of a schematic embodiment of the first locking point element disassembly connection retainer of the present application is depicted;

[0024] Figure 4 A schematic structural diagram of a schematic implementation scheme of the thinning of the window beam of the double-locking-point cylindrical roller bearing cage of the present application is depicted;

[0025] Figure 5 A schematic structural diagram of a schematic embodiment of the oil tank of the first locking point element of the present application is depicted;

[0026] Description of labels:

[0027] 10-end ring; 100-flanged edge; 101-plug interface; 11-window beam; 110-oil hole; 12-pocket; 13-first locking point element; 130-oil groove; 14-second locking point element; 15-debris interceptor; 2-cylindrical roller; 20-first matching groove; 200-elastic plastic part; 201-monitoring part; 21-second matching groove. DETAILED DESCRIPTION

[0028] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0029] The present invention will be described below with reference to the accompanying drawings.

[0030] The specific plans adopted are:

[0031] like Figure 1-5 As shown, the present invention provides a double-locking-point cylindrical roller bearing retainer, comprising two end rings 10 and window beams 11 connecting the two end rings and arranged uniformly in a circumference, pockets for mounting cylindrical rollers 2 are formed between adjacent window beams, the upper inner wall of the pockets 12 is provided with a first locking point element 13, the lower inner wall of the pockets is provided with a relative second locking point element 14, the thickness of the first locking point element and the second locking point element is greater than the thickness of the window beam; a first matching groove 20 is provided at the center of the upper side of the cylindrical roller, and a second matching groove 21 is provided at the center of the lower side, the first matching groove and the second matching groove respectively cooperate with the first locking point element and the second locking point element to limit the cylindrical roller to rotate at a predetermined position, ensuring that it will not collide with the window beam constituting the pocket during operation, so as to extend the service life of the retainer.

[0032] In this structure, the first and second mating grooves, through their respective engagement with the first and second locking elements, restrict the cylindrical roller 2's rotation to a predetermined position, reducing direct collisions between the roller and the window sill forming the pocket during operation. The thickness of the first and second locking elements is greater than that of the window sill, providing local reinforcement at the contact points between the cylindrical roller and the retainer. This reduces stress concentration at these critical contact points between the roller and the retainer, thereby lowering the risk of fatigue damage. Lightweighting can be achieved by optimizing the window sill's structure and reducing unnecessary material usage. For example, the window sill can be made of a lighter yet sufficiently strong material, or by employing a more sophisticated structural design to reduce material waste.

[0033] Based on the above beneficial effects, double-locking-point cylindrical roller bearing cages are suitable for high-speed, high-load scenarios: such as high-speed motors, machine tool spindles, etc., which have high requirements on the bearing's load-bearing capacity and running smoothness; or engineering machinery, railway vehicles, etc., in which the bearings need to withstand large vibration and impact loads.

[0034] As a preferred embodiment of the present application, the first locking point element 13 and the second locking point element 14 are integrally formed with the retaining frame, the length of the first locking point element is greater than that of the second locking point element, and the length of the second locking point element is set to be less than or equal to the vertical distance between its lower surface and the lower inner wall of the pocket when the upper surface of the cylindrical roller is in contact with the upper inner wall of the pocket.

[0035] The first locking point element and the second locking point element are integrally formed with the retaining frame, which can significantly improve the integrity of the structure and avoid stress concentration and potential failure points caused by the connection between different components. Specifically, in order to facilitate installation, the length of the first locking point element is designed to be greater than the second locking point element. During the installation process, the first locking point element is first installed in the first matching groove, and then the upper surface of the cylindrical roller is made to fit the upper inner wall of the pocket hole. Finally, the roller is dropped to allow the second locking point element to smoothly enter the second matching groove. At this time, the first locking point element is still located in the first matching groove. In addition, the shape of the locking point element can be customized according to actual needs, such as cylindrical, square or other shapes to meet different working conditions and performance requirements.

[0036] As a preferred embodiment of the present application, the first locking point element and the second locking point element are detachably connected to the retaining frame, for example, an insertion port 101 is provided on the end ring. The detachable locking point element makes it unnecessary to replace the entire retaining frame when the retaining frame is worn or damaged, but only the damaged locking point element needs to be replaced, thereby reducing maintenance costs.

[0037] Furthermore, the detachable first locking point element / second locking point element includes an outer elastic plastic part 200 that can effectively absorb and disperse the impact force generated when the roller is running, and a monitoring part 201 wrapped inside the elastic plastic part to monitor the roller operation parameters.

[0038] Specifically, the outer elastic plastic part can effectively absorb and disperse the impact force generated by the roller during operation, thereby reducing the collision and wear between the roller and the cage, and extending the service life of the bearing. The monitoring part wrapped inside the elastic plastic part can monitor the operating parameters of the roller in real time, such as speed, temperature, vibration, etc., providing important data support for the maintenance and management of the bearing. The real-time monitoring function can detect potential bearing failures in advance and avoid equipment shutdowns or safety accidents caused by sudden failures.

[0039] Application scenario examples: In the wheel axle bearings of high-speed railway trains, bearings using this retainer can monitor the operating status of the bearings in real time, promptly detect potential wear and failures, and ensure the safety and reliability of train operation; the bearings of wind power generation equipment need to withstand huge wind forces and speed changes. The locking point elements using this solution can absorb and disperse impact forces, while monitoring the operating parameters of the bearings, providing data support for equipment maintenance and management; in precision measuring instruments, even slight wear of the bearings may lead to deviations in the measurement results. Potential wear and failures can be detected and handled in a timely manner to ensure the accuracy and stability of the measurement results.

[0040] Specifically, monitoring element 201 is designed to monitor the ambient temperature of the roller during operation and the number or force of collisions between the roller and the elastic plastic element 200. To achieve these functions, wireless sensor technology is employed. The monitoring element can utilize an ambient temperature sensor, such as a thermistor, thermocouple, or infrared temperature sensor. Monitoring the ambient temperature during roller operation helps understand the bearing's operating status and environmental conditions. High temperatures exceeding the designed value indicate material softening, lubrication failure, or wear within the bearing. Therefore, timely monitoring of ambient temperature is crucial for preventing failures and extending bearing life.

[0041] For collision monitoring, vibration sensors can be selected to measure the vibration waveforms generated by objects during collision to infer the intensity and number of collisions. By monitoring the number or force of collisions between rollers and elastic plastic parts, the wear condition and lubrication effect of bearings can be evaluated. For example, frequent collisions or excessive impact forces during the design cycle may cause bearing damage or premature failure. Therefore, timely monitoring of collision conditions can help to detect potential problems in advance and perform maintenance.

[0042] As a preferred embodiment of the present application, the diameter of the first mating groove / the second mating groove is larger than the diameter of the first locking point element / the second locking point element, and the groove depth of the first mating groove and the second mating groove is larger than the length of the first locking point element / the second locking point element, so as to ensure that after assembly, the locking point element can have a certain amount of movable space in the mating groove, that is, the rotation margin. The depth of the mating groove is greater than the length of the locking point element, which can provide sufficient axial movement space for the locking point element and sufficient fat-dissolving space for the lubricating oil.

[0043] Furthermore, an oil groove 130 is provided on the side of the first locking element / second locking element facing the first mating groove / second mating groove. An oil storage space is formed between the oil groove and the mating groove to provide continuous lubrication for the contact surface between the locking element and the mating groove. When the locking element is installed in the mating groove, due to the effect of atmospheric pressure, the grease in the oil groove will be subjected to a certain pressure, thereby being pressed onto the contact surface between the locking element and the mating groove. This pressure effect is similar to the atmospheric pressure in the principle of water absorption by an upside-down bottle. It allows the grease to maintain a certain stability on the contact surface and is not easily thrown out, thereby ensuring that the contact surface between the locking element and the mating groove can be continuously lubricated, effectively reducing friction and wear, and extending the service life of the component.

[0044] As a preferred embodiment of the present application, the window beam 11 is thinned and multiple slices are arranged at radial intervals to enhance the load-bearing performance. The first locking element and the second locking element jointly limit the range of motion of the cylindrical roller, thereby effectively avoiding collisions between the cylindrical roller and the window beam. Therefore, a lighter and thinner window beam design can be adopted, that is, a thinned window beam. To compensate for the lack of strength of thin window beams, multiple thin window beams are arranged at radial intervals to enhance their overall load-bearing performance. The window beam can be connected to the end ring by riveting. The thinned window beam design makes the entire system lighter, which is conducive to reducing energy consumption and improving system flexibility. At the same time, the thin window beam is also easier to process and install, reducing production costs.

[0045] Furthermore, the window beam is provided with at least one oil hole 110 and a debris interceptor 15 is provided between adjacent thin-film window beams to maintain good lubrication and cleanliness inside the bearing. As the bearing runs for a long time, the material inside it will gradually wear out due to friction, producing tiny iron foam. At the same time, during the operation of the bearing, dust, sand and other impurities in the external environment may invade the interior of the bearing through the poorly sealed parts; the lubricating oil will gradually age during long-term use, producing impurities such as sediment and colloid, which may also become the source of debris. The presence of debris will cause scratches and wear on the rolling elements and raceways of the bearing, and in severe cases may even cause damage to the bearing.

[0046] The debris interception member 15 is provided between adjacent thin-film window beams, which can effectively intercept the iron particles generated by the friction between iron and iron inside the bearing and the impurities invading from the outside. When these iron particles and impurities are intercepted, they can be prevented from entering the lubrication system of the bearing, thereby maintaining the cleanliness and lubrication performance of the lubricating oil, which helps to reduce the friction and wear of the bearing and improve the operating efficiency and life of the bearing.

[0047] The debris interceptors can be in various forms, such as metal mesh or screen, non-metallic fiber materials, magnetic interceptors or combination interceptors of the above. They can be installed by welding, riveting, bolting or utilizing the extrusion force between adjacent window beams. The detachable form facilitates the periodic replacement of interceptors to remove impurities, iron foam debris, etc., which helps to extend the service life of the bearings.

[0048] As a preferred embodiment of the present application, both end rings of the retaining frame are provided with flanges 100 facing away from the center of the circle, and the first locking point element and the second locking point element are provided on the flanges. The flanges provide a wider mounting surface, and the first locking point element and the second locking point element can be more firmly fixed on the retaining frame. Thicker locking point elements mean higher rigidity and anti-deformation ability, which is crucial to ensuring the correct positioning of the cylindrical roller in the bearing.

[0049] Anything not described in the present invention can be achieved by adopting or drawing on existing technologies.

[0050] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A double locking point cylindrical roller bearing cage, characterized in that: It includes two end rings and a window beam connecting the two end rings and arranged evenly in a circle, pockets for installing cylindrical rollers are formed between adjacent window beams, the upper inner wall of the pockets is provided with a first locking point element, the lower inner wall of the pockets is provided with a relative second locking point element, the thickness of the first locking point element and the second locking point element is greater than the thickness of the window beam; a first matching groove is provided at the center of the upper side of the cylindrical roller, and a second matching groove is provided at the center of the lower side, the first matching groove and the second matching groove respectively cooperate with the first locking point element and the second locking point element to limit the cylindrical roller to rotate in a predetermined position, ensuring that it will not collide with the window beam constituting the pocket during operation, so as to extend the service life of the retaining frame.

2. The double locking point cylindrical roller bearing cage according to claim 1, characterized in that: The first locking point element and the second locking point element are integrally formed with the retaining frame, the length of the first locking point element is greater than that of the second locking point element, and the length of the second locking point element is set to be less than or equal to the vertical distance between its lower surface and the lower inner wall of the pocket when the upper surface of the cylindrical roller is in contact with the upper inner wall of the pocket.

3. The double locking point cylindrical roller bearing cage according to claim 1, characterized in that: The first locking point element and the second locking point element are detachably connected to the retaining frame.

4. The double locking point cylindrical roller bearing cage according to claim 3, characterized in that: The first locking point element / the second locking point element comprises an outer elastic plastic part capable of effectively absorbing and dispersing the impact force generated when the roller is running, and a monitoring part wrapped inside the elastic plastic part for monitoring the running parameters of the roller.

5. The double locking point cylindrical roller bearing cage according to claim 4, characterized in that: The monitoring component can monitor the ambient temperature of the roller operation / monitor the number or strength of collisions between the roller and the elastic plastic component.

6. The double locking point cylindrical roller bearing cage according to claim 1, characterized in that: The diameter of the first matching groove / the second matching groove is greater than the diameter of the first locking point element / the second locking point element, and the groove depth of the first matching groove and the second matching groove is greater than the length of the first locking point element / the second locking point element.

7. The double locking point cylindrical roller bearing cage according to claim 6, characterized in that: The first locking point element / the second locking point element is provided with an oil groove on one side facing the first matching groove / the second matching groove, and an oil storage space is formed between the oil groove and the matching groove to provide continuous lubrication for the contact surface between the locking point element and the matching groove.

8. The double locking point cylindrical roller bearing cage according to claim 1, characterized in that: The window beam is arranged in thin slices and multiple slices are arranged at intervals along the radial direction to enhance the bearing performance.

9. The double locking point cylindrical roller bearing cage according to claim 8, characterized in that: The window beam is provided with at least one oil hole and debris intercepting pieces are arranged between adjacent thin-film window beams to maintain a good lubrication state and cleanliness inside the bearing.

10. The double locking point cylindrical roller bearing cage according to claim 1, characterized in that: Both end rings of the retaining frame are provided with flanges away from the center of the circle, and the first locking point element and the second locking point element are arranged on the flanges.

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