Bearing retainer with anti-locking structure

Abstract

The utility model provides a bearing retainer of an anti-locking structure, which relates to the technical field of bearing retainers, and comprises a bearing retainer body and a plurality of anti-locking structures, the bearing retainer body is uniformly provided with a plurality of mounting grooves along the circumferential direction, the anti-locking structures are embedded in the mounting grooves, and the anti-locking structures are embedded in the mounting grooves. The anti-locking structure comprises a fixed pocket in the middle and fixed connecting rods symmetrically arranged on the two sides of the fixed pocket, and the fixed connecting rods are connected with the mounting grooves in a matched mode. According to the utility model, the anti-locking structures for accommodating the balls are designed into the independent split modules and are embedded in the mounting grooves of the retainer body, so that the manufacturing difficulty of processing complex micro-textures on the inner walls of the pockets is reduced, and the material optimization aiming at a friction core area is also realized.

Description

Technical Field

[0001] This utility model relates to the field of bearing cages, and more particularly to a bearing cage with an anti-jamming structure. Background Technology

[0002] Rolling bearings, as core components of modern mechanical transmission systems, are widely used in aerospace, precision machine tools, high-speed trains, and various industrial automation equipment. Under these high-load and high-speed operating conditions, high-frequency relative motion occurs between the rolling elements inside the bearing and the raceways of the inner and outer rings. The main function of the bearing cage is to evenly separate the rolling elements, guide their orderly rotation, and prevent them from colliding with each other. To ensure the long-term stable operation of the bearing, the lubrication state of the contact interface between the cage and the rolling elements is crucial. A good lubricating oil film not only reduces the coefficient of friction but also dissipates the heat generated by friction, thereby extending the bearing's service life and maintaining the operating accuracy of the equipment.

[0003] However, existing bearing cages typically employ a one-piece machined structure, with the inner walls of the pockets accommodating the rolling elements often being smooth curved surfaces or simple through-hole structures. This traditional design has significant limitations in practical applications, especially under high-speed rotation or variable-speed operation. Due to centrifugal force, the grease adhering to the inner walls of the cage pockets and the surfaces of the rolling elements is easily thrown out into the bearing outer raceway, leading to grease deficiency inside the pockets. If lubrication is not replenished in time, the lubrication between the rolling elements and the cage pockets will change from fluid lubrication to dry friction. This intense friction instantly generates a large amount of heat, causing the cage material to thermally expand and deform due to temperature rise. Ultimately, this can lead to the cage seizing the rolling elements or becoming stuck between the bearing rings, severely affecting the safety and reliability of the machinery.

[0004] Therefore, we propose a bearing cage with an anti-jamming structure. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a bearing cage with an anti-jamming structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bearing cage with anti-jamming structure includes a bearing cage body and a plurality of anti-jamming structures;

[0008] The bearing cage body has several mounting slots evenly distributed along the circumferential direction, and the anti-jamming structure is embedded in the mounting slots;

[0009] The anti-jamming structure includes a central fixed pocket and fixed connecting rods symmetrically arranged on both sides of the fixed pocket, the fixed connecting rods being connected to the mounting groove.

[0010] The fixed pocket has a spherical cavity at its center for accommodating the ball bearings. An oil storage groove is recessed on the inner wall of the fixed pocket, and an oil guide groove is also formed on the inner wall of the fixed pocket.

[0011] As a preferred embodiment of this utility model, the mounting groove penetrates the inner cylindrical surface and the outer cylindrical surface of the bearing cage body, and the side wall shape of the mounting groove is adapted to the cross-sectional shape of the fixed connecting rod.

[0012] As a preferred embodiment of this utility model, the oil storage groove is an annular groove opened at the equator position on the inner wall of the fixed pocket, and the oil storage groove is a blind groove that does not penetrate the wall thickness of the fixed pocket.

[0013] As a preferred embodiment of this utility model, at least two oil guide grooves are provided, one end of which is connected to the edge of the end face of the fixed pocket, and the other end extends and is connected to the spherical cavity inside the fixed pocket or the oil storage tank.

[0014] As a preferred embodiment of this utility model, the oil guide grooves are distributed in a figure-eight shape or a spiral shape on the inner wall surface of the fixed pocket.

[0015] As a preferred embodiment of this utility model, the fixed connecting rod and the fixed pocket are integrally injection molded structures, and the outer end face of the fixed connecting rod is flush with the outer surface of the bearing cage body.

[0016] As a preferred embodiment of this utility model, the cross-sectional shape of the oil storage tank and the oil guide groove is one of the following: arc shape, U shape or V shape.

[0017] As a preferred embodiment of this utility model, the ball and the fixed pocket are in clearance fit, and the diameter of the ball is greater than the wall thickness of the bearing cage body.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] In this invention, the anti-jamming structure for accommodating the balls is designed as an independent, separate module and embedded in the mounting groove of the cage body. This not only reduces the manufacturing difficulty of processing complex micro-textures on the inner wall of the pocket, but also achieves material optimization for the core friction area. At the same time, a mechanical self-lubricating circulation system is constructed by using the oil storage groove and oil guide groove integrated on the inner wall of the fixed pocket. This system can automatically guide and release grease to the surface of the rolling elements using the centrifugal force and thermal effect during bearing operation. This effectively solves the problems of dry friction jamming and thermal expansion seizing caused by high-speed oil splashing in traditional cages, and significantly improves the lubrication reliability and service life of the bearing under harsh working conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the bearing cage body in this utility model;

[0022] Figure 3 This is an exploded structural diagram of the anti-jamming structure and the ball bearings in this utility model.

[0023] Legend: 10. Bearing cage body; 20. Mounting groove; 30. Anti-jamming structure; 301. Fixing pocket; 302. Oil reservoir; 303. Oil guide groove; 304. Ball bearing; 305. Fixing connecting rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Example 1

[0029] like Figures 1 to 3 As shown, this utility model provides a bearing cage with an anti-jamming structure. The device is mainly assembled from a bearing cage body 10 and several independently manufactured anti-jamming structures 30. The bearing cage body 10 has several mounting grooves 20 evenly distributed along the circumferential direction. The anti-jamming structures 30 are securely installed in the mounting grooves 20 by physical embedding. This split design allows the bearing cage body 10 to use high-strength metal materials (such as carbon steel or brass) to ensure the rigidity of the overall frame, while the anti-jamming structures 30 can be made of engineering plastics with self-lubricating properties (such as PEEK or nylon) or copper alloys, thereby reducing the processing difficulty while achieving an optimized combination of material properties.

[0030] In terms of specific structure, the anti-jamming structure 30 includes a fixed pocket 301 located in the middle and fixed connecting rods 305 symmetrically arranged on both sides of the fixed pocket 301. The fixed connecting rods 305 and the mounting groove 20 are tightly connected to ensure that the anti-jamming structure 30 will not loosen or shift during high-speed rotation. The center of the fixed pocket 301 has a spherical cavity for accommodating the ball 304. The inner diameter of the spherical cavity is slightly larger than the diameter of the ball 304 to ensure that the ball 304 can rotate freely. The key is that an oil storage groove 302 is recessed on the inner wall of the fixed pocket 301, and an oil guide groove 303 is also formed on the inner wall of the fixed pocket 301. Through this structural improvement, the lubricating medium can be effectively guided and stored, thereby improving the lubrication state of the friction interface.

[0031] Furthermore, the mounting groove 20 is designed as a through-hole structure that penetrates the inner and outer cylindrical surfaces of the bearing cage body 10, and the sidewall shape of the mounting groove 20 is adapted to the cross-sectional shape of the fixed connecting rod 305. This through-hole design is to ensure that the balls 304 installed in the anti-jamming structure 30 can protrude from both the inner and outer diameters of the bearing cage body 10, thereby maintaining effective rolling contact with the inner and outer raceways of the bearing (not shown in the figure). The shape of the fixed connecting rod 305 is adapted to the sidewall of the mounting groove 20 (for example, both adopt rectangular or dovetail cross-sections), which can play a role in circumferential positioning and preventing overturning, thus enhancing the stability of the structure.

[0032] To ensure the overall flatness of the bearing and reduce resistance when stirring the lubricating oil, the fixed connecting rod 305 and the fixed pocket 301 are preferably made of one-piece injection molding or one-piece precision casting. After installation, the outer end face of the fixed connecting rod 305 is flush with the outer surface of the bearing cage body 10. This flush design avoids unnecessary wind resistance or oil churning loss when the cage is running at high speed, and also prevents interference with the external seals of the bearing.

[0033] Regarding the fit between the rolling elements, the ball 304 and the fixed pocket 301 are in clearance fit, and the diameter of the ball 304 is designed to be greater than the wall thickness of the bearing cage body 10. Since the diameter of the ball 304 is greater than the wall thickness, the ball 304 will protrude from the surface of the cage in the radial position. This ensures that the main load of the bearing is borne by the ball 304, while the cage only plays a guiding role and will not bear the radial load, thereby reducing the mechanical stress of the anti-jamming structure 30.

[0034] Example 2

[0035] This embodiment focuses on explaining the core self-lubrication and anti-jamming mechanism of the device, namely the specific structure and function of the oil storage tank 302 and the oil guide groove 303.

[0036] like Figure 3 As shown, the oil reservoir 302 is an annular groove located at the equator on the inner wall of the fixed pocket 301. The equator is the position of the circumferential contact line where the diameter of the ball 304 is the largest. This is the area where the relative sliding speed between the ball 304 and the fixed pocket 301 is the highest and the heat generation is the most concentrated. By placing the oil reservoir 302 here, an oil film can be directly established at the core of the frictional heat source. The oil reservoir 302 is a blind groove design that does not penetrate the wall thickness of the fixed pocket 301. This ensures that the fixed pocket 301 still has sufficient structural strength after the groove is opened and will not break due to the thin wall thickness. When the bearing is filled with grease, the excess grease will be squeezed and stored in the oil reservoir 302. When the bearing operating temperature rises, the grease in the oil reservoir 302 expands due to heat and precipitates the base oil, which directly lubricates the surface of the ball 304.

[0037] To address the issue of insufficient oil supply caused by high-speed oil spillage, at least two oil guide grooves 303 are provided. One end of the oil guide groove 303 connects to the edge of the end face of the fixed pocket 301 (i.e., directly exposed to the oil mist environment inside the bearing), and the other end extends and connects to the spherical cavity inside the fixed pocket 301 or directly connects to the oil reservoir 302. In a preferred embodiment, the oil guide grooves 303 are distributed in a figure-eight shape or a spiral shape on the inner wall of the fixed pocket 301. When the cage rotates at high speed with the bearing, the figure-eight or spiral oil guide grooves 303 use a principle similar to turbine blades to capture oil mist or free lubricating oil in the surrounding air, and use the components of centrifugal force and tangential force to force the external lubricating oil to flow along the grooves into the fixed pocket 301 and the oil reservoir 302, forming a dynamic cycle of collection-guidance-lubrication, thereby ensuring continuous oil supply.

[0038] In terms of micro-section design, the cross-sectional shape of the oil reservoir 302 and the oil guide groove 303 is preferably one of arc, U-shape or V-shape. Among them, the arc and U-shaped cross-sections are conducive to the adhesion and flow of grease and reduce flow resistance; while the V-shaped cross-section has advantages in chip removal. If tiny impurities enter the gap, they are easily sunk to the bottom of the V-shaped groove and discharged, preventing jamming. The specific cross-sectional shape can be selected according to the viscosity characteristics of the grease.

[0039] When this utility model is in operation, the anti-jamming structure 30 rotates together with the bearing cage body 10, the oil guide groove 303 continuously pumps the external lubricating medium into the fixed pocket 301, and the oil storage tank 302 releases the stored grease at high temperature or at the moment of start-up. This dual lubrication mechanism, combined with the wear-resistant split material design, effectively solves the problem of jamming caused by dry friction heating and expansion deformation of the bearing cage in the prior art.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bearing cage of a dead -stop prevention structure, characterized by, The bearing retainer body (10) and a plurality of anti-lock structures (30) are included. A plurality of installation grooves (20) are evenly arranged on the bearing retainer body (10) in the circumferential direction, and the anti-lock structures (30) are embedded in the installation grooves (20). The anti-lock structure (30) includes a middle fixed pocket (301) and a fixed connecting rod (305) symmetrically arranged on both sides of the fixed pocket (301), and the fixed connecting rod (305) is connected with the installation groove (20). A spherical cavity for accommodating a ball (304) is formed at the center of the fixed pocket (301), an oil storage groove (302) is recessed on the inner wall surface of the fixed pocket (301), and an oil guide groove (303) is also arranged on the inner wall surface of the fixed pocket (301).

2. The bearing cage of claim 1, wherein, The installation groove (20) penetrates the inner cylindrical surface and the outer cylindrical surface of the bearing retainer body (10), and the side wall shape of the installation groove (20) is matched with the cross-sectional shape of the fixed connecting rod (305).

3. The bearing cage of claim 2, wherein, The oil storage groove (302) is an annular groove arranged on the inner wall equator line of the fixed pocket (301), and the oil storage groove (302) is a blind groove without penetrating the wall thickness of the fixed pocket (301).

4. The bearing cage of claim 3, wherein, The oil guide groove (303) is arranged at least two, one end of the oil guide groove (303) is communicated to the end face edge of the fixed pocket (301), and the other end is extended and communicated to the spherical cavity inside the fixed pocket (301) or the oil storage groove (302).

5. The bearing cage of claim 4, wherein, The oil guide groove (303) is distributed in an eight-shaped or spiral line shape on the inner wall surface of the fixed pocket (301).

6. The bearing cage of claim 5, wherein, The fixed connecting rod (305) and the fixed pocket (301) are integrally injection molded structures, and the outer end face of the fixed connecting rod (305) is flush with the outer surface of the bearing retainer body (10).

7. The bearing cage of claim 6, wherein, The cross-sectional shape of the oil storage groove (302) and the oil guide groove (303) is one of circular arc, U-shaped or V-shaped.

8. The bearing cage of claim 7, wherein, The ball (304) and the fixed pocket (301) are gap-fitted, and the diameter of the ball (304) is greater than the wall thickness of the bearing retainer body (10).

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