Thin-wall bearing retainer

Abstract

The thin-wall bearing retainer comprises a retainer body, the retainer body is provided with window beams which are annularly arranged at equal intervals, pockets matched with balls in shape are formed between the adjacent window beams, one side of each pocket is provided with an opening, and the inner wall of each pocket is bent outwards in the direction away from the circle center to form an outer flange. The base area of contact between the balls and the window beam is increased, the effect of increasing the wall thickness is simulated, therefore, the impact force of the balls on the window beam is dispersed, local abrasion and deformation are reduced, the design of the deformation gaps allows the outer flanges to be bent and deformed to a certain degree when the outer flanges are impacted, the impact force is further absorbed and dispersed, and the service life of the window beam is prolonged. The stress directly transmitted to the window beam is reduced; when the bending degree of the outer flanging exceeds the deformation gap, the supporting part can provide additional support to prevent the outer flanging from being excessively bent or broken, so that the service life of the outer flanging is prolonged, and the cage failure caused by fatigue breaking is avoided.

Description

Technical Field

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

[0002] Thin-walled bearings, a core component of miniaturization and lightweight design, are distinguished by their extremely thin cross-section. This significantly limits radial space, which in turn compresses the design space of the cage, necessitating an ultra-thin cage design. These bearings typically utilize a single-sided retainer design. During assembly, the inner ring is first placed against one side of the outer ring, followed by the placement of steel balls in the gap between the inner and outer rings. The inner ring is then adjusted to a concentric position with the outer ring. Precise control is used to achieve uniform distribution of the steel balls, and a moderate preload is applied to press the balls into the retainer pockets.

[0003] However, during the operation of thin-walled bearings, the contact interface between the balls and the inner wall of the cage pocket becomes a potential area of wear and deformation. Given the thin-walled nature of the cage, its window beam structure is particularly fragile under the dynamic action of the balls, and is prone to deformation or even failure. Chinese patent application number 201520563867.8 proposes a thin-walled crown-type cage design, in which the inner wall of the pocket adopts an outward flange structure, which aims to increase the base area of contact between the balls and the window beam, simulating the effect of increased wall thickness, thereby improving structural strength. Despite this, under long-term operation, this flange structure is still difficult to completely withstand the continuous impact of the balls, and there is a risk of breakage, which in turn affects the overall life and reliability of the bearing. Therefore, for the structural design of thin-walled bearing cages, further exploration and optimization are still needed to enhance their durability and stability. It can be seen that the existing technology needs to be further improved and enhanced. Utility Model Content

[0004] The utility model provides a thin-wall bearing retainer, which at least solves or alleviates one or more technical problems in the prior art, or at least provides a beneficial choice.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A thin-walled bearing retainer includes a retainer body, the retainer body is provided with window beams arranged at equal intervals in a circumferential direction, pockets adapted to the shape of ball bearings are formed between adjacent window beams, one side of the pockets is open, the inner wall of the pockets is bent outward away from the center of the circle to form an outer flange, a support portion is provided on the outer wall of the window beam, a deformation gap is provided between the support portion and the outer flange, the outer flange is allowed to bend and deform in the deformation gap to absorb the impact force of the ball bearing; after the bending degree of the outer flange exceeds the deformation gap, it can abut the support portion, and the support portion provides support for the outer flange to prevent it from excessive bending, thereby improving its service life.

[0007] The thin-walled bearing cage of the present application increases the contact area between the ball and the window beam by setting an outward-turned edge on the inner wall of the pocket hole, simulating the effect of increased wall thickness, thereby dispersing the impact force of the ball on the window beam, reducing local wear and deformation. The design of the deformation gap allows the outward-turned edge to bend to a certain extent when impacted, further absorbing and dispersing the impact force and reducing the stress directly transmitted to the window beam. When the bending degree of the outward-turned edge exceeds the deformation gap, the support portion provides additional support to prevent the outward-turned edge from bending excessively or breaking. This design extends the service life of the outward-turned edge, avoids the failure of the cage caused by fatigue breakage, and improves the durability, stability, and reliability of the thin-walled cage, providing a more reliable guarantee for the application of the thin-walled bearing.

[0008] In a preferred implementation, the thickness of the support portion in the radial direction is less than or equal to the length of the outward-turned edge in the radial direction.

[0009] In a preferred implementation, the support portion is a solid support rib provided on the outer wall of the window beam.

[0010] In a preferred implementation, the support rib is detachably provided on the outer wall of the window beam or integrally formed with the window beam.

[0011] In a preferred implementation, the support portion is a convex portion naturally formed on the outer side of the window beam by the inward concavity of the inner region of the window beam away from the center of the circle.

[0012] By inwardly concaving the inner region of the window beam, the convex portion naturally formed on the outer side serves as the support portion, reducing the use of additional materials, thereby achieving the lightweight of the cage, helping to reduce the weight of the entire bearing system, improving the flexibility and response speed of the moving parts, and since the support portion is a convex portion naturally formed on the window beam and is closely connected to the window beam body, it has high structural strength. The integrally formed design simplifies the manufacturing process, not only improving production efficiency but also reducing manufacturing costs.

[0013] In a preferred implementation, an oil storage space is formed in the inwardly concave region of the window beam.

[0014] The oil storage space can store a certain amount of lubricating oil or grease, thereby providing lubrication during the operation of the bearing, reducing the friction and wear between the ball and the window beam, improving the operation efficiency and service life of the bearing. The oil storage space can also serve as a heat dissipation area for the window beam, which can extend the contact time between the lubricating oil and the window beam wall and increase the contact area, facilitating heat transfer and dissipation.

[0015] In a preferred implementation, the two side edges of the support portion are arc surfaces and are adapted to the shape of the outward-turned edge.

[0016] The shape of the flanged edge is adapted to the arc edge of the support part, so that the two can transfer force more closely and evenly when they come into contact.

[0017] In a preferred implementation, multiple oil grooves are provided on the inner wall of the pocket hole to reduce the contact area between the ball and the inner wall of the pocket hole.

[0018] In a preferred implementation, the distance between two adjacent window beams gradually decreases in the direction away from the center of the circle. Description of the Drawings

[0019] The drawings described herein are used to provide a further understanding of the present utility model and form a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present application and do not constitute an improper limitation to the present utility model. In the drawings:

[0020] Figure 1 A schematic three-dimensional structure diagram of a schematic embodiment of the thin-walled bearing cage of the present application is shown;

[0021] Figure 2 A schematic structural diagram of a schematic embodiment of installing balls in the thin-walled bearing cage of the present application is shown;

[0022] Figure 3 A schematic enlarged structural diagram of a schematic embodiment of the pocket hole of the present application is shown;

[0023] Reference Numeral Description:

[0024] 10 - window beam; 11 - pocket hole; 12 - flanged edge; 120 - deformation gap; 13 - support part; 130 - arc surface; 14 - oil storage space; 15 - oil groove; 16 - ball. Detailed Embodiment

[0025] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium.

[0027] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and they are only connected through the connection structure to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0029] The following describes the present utility model in conjunction with the drawings of the specification.

[0030] The specific solution adopted is as follows:

[0031] As Figures 1-3 shown, the present utility model provides a thin-walled bearing cage, including a cage body. The cage body is provided with window beams 10 arranged at equal circumferential intervals. Pocket holes 11 adapted to the shape of the balls are formed between adjacent window beams. One side of the pocket hole is open. The inner wall of the pocket hole bends outward in a direction away from the center of the circle to form an outward-turned edge 12. A support portion 13 is provided on the outer side wall of the window beam. There is a deformation gap 120 between the support portion and the outward-turned edge, allowing the outward-turned edge to bend and deform within the deformation gap to absorb the impact force of the balls; after the bending degree of the outward-turned edge exceeds the deformation gap, it can abut against the support portion, and the support portion provides support for the outward-turned edge to prevent it from being excessively bent, so as to improve the service life.

[0032] In the above structure, by providing an outward-turned edge on the inner wall of the pocket hole, the basic area of contact between the balls and the window beam is increased, simulating the effect of increased wall thickness, thereby dispersing the impact force of the balls on the window beam, reducing local wear and deformation. The design of the deformation gap allows the outward-turned edge to bend to a certain extent when impacted, further absorbing and dispersing the impact force and reducing the stress directly transmitted to the window beam. When the bending degree of the outward-turned edge exceeds the deformation gap, the support portion provides additional support to prevent the outward-turned edge from being excessively bent or broken. This design extends the service life of the outward-turned edge, avoids the failure of the cage caused by fatigue breakage, and improves the durability, stability and reliability of the thin-wall cage, providing a more reliable guarantee for the application of thin-wall bearings.

[0033] As a preferred embodiment of the present application, the thickness of the support portion 13 in the radial direction is less than or equal to the length of the outward-turned edge 12 in the radial direction, which can effectively support the outward-turned edge and prevent it from being excessively bent without increasing the overall thickness of the thin-wall bearing, thereby improving the durability and reliability of the cage.

[0034] The support portion can be implemented in one of the following embodiments:

[0035] Embodiment 1: The support portion is a solid support rib provided on the outer wall of the window beam, not shown in the figure. Those skilled in the art can understand that it is a multi-rib structure on the outer wall of the window beam. This support rib can be detachably provided on the outer wall of the window beam or integrally formed with the window beam. The support rib is detachably provided on the outer wall of the window beam, for example, by plugging. During the use of the cage, if a certain support rib is damaged or needs to be replaced, it can be individually disassembled and replaced without replacing the entire cage, thereby improving the convenience and economy of maintenance. When the support rib is integrally formed with the window beam, the support rib and the window beam can be connected by welding or the blank for producing the cage is provided with the support rib, and their connection is more firm and the overall structural strength is higher.

[0036] Embodiment 2: The support portion is a convex portion naturally formed on the outer side of the window beam by the inward concavity of the inner region of the window beam towards the direction away from the center of the circle. By inwardly concaving the inner region of the window beam, the convex portion naturally formed on the outer side serves as the support portion, reducing the use of additional materials, thereby realizing the lightweight of the cage, helping to reduce the weight of the entire bearing system, improving the flexibility and response speed of the moving parts, and since the support portion is a convex portion naturally formed on the window beam and is closely connected to the window beam body, it has high structural strength. The integrally formed design simplifies the manufacturing process, not only improving the production efficiency but also reducing the manufacturing cost.

[0037] Furthermore, an oil storage space 14 is naturally formed in the concave area of the window beam. The oil storage space can store a certain amount of lubricating oil or grease, thereby providing lubrication during the operation of the bearing, reducing the friction and wear between the ball 16 and the window beam, and improving the operation efficiency and service life of the bearing.

[0038] During the operation of the bearing, friction will occur between the ball and the window beam, and this friction will cause heat generation. Especially in the case of high-speed operation or high load, more heat will be generated by the friction. The oil storage space can also serve as a heat dissipation area for the window beam, which can extend the contact time between the lubricating oil and the window beam wall and increase the contact area, facilitating heat transfer and dissipation. By improving the lubrication and heat dissipation conditions, the thermal stress and thermal deformation of the window beam caused by high temperature can be reduced, thereby protecting the stability and integrity of the window beam structure.

[0039] As a preferred embodiment of the present application, the two side edges of the support portion 13 are arc surfaces 130 and are adapted to the shape of the outward turned edge. The shape of the outward turned edge is adapted to the arc edge of the support portion, so that the two can transfer forces more closely and evenly when in contact. This design enhances the connection strength between the support portion and the outward turned edge and improves the stability and reliability of the overall structure. When the outward turned edge is bent and deformed outward, due to its shape being adapted to the arc surface of the support portion edge, the contact between the two will be smoother and more continuous.

[0040] As a preferred embodiment of the present application, multiple oil passing grooves 15 are provided on the inner wall of the pocket hole. The presence of the oil passing grooves reduces the direct contact area between the ball and the inner wall of the pocket hole. During the operation of the bearing, the friction between the ball and the inner wall is one of the main reasons for heat generation and wear. By reducing the contact area, this part of the friction can be significantly reduced, thereby reducing heat generation and wear and extending the service life of the bearing.

[0041] As a preferred embodiment of the present application, the distance between two adjacent window beams gradually decreases in the direction away from the center of the circle. When the distance between two adjacent window beams 10 gradually decreases in the direction away from the center of the circle, the outward movement of the ball under the action of centrifugal force is restricted. When the ball is pushed by the centrifugal force, it will encounter a gradually narrowing channel, thereby being restricted in the pocket hole and reducing the risk of detachment.

[0042] In the present utility model, the parts not described can be implemented by adopting or referring to the existing technologies.

[0043] The above is only the specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A thin-walled bearing cage, comprising a cage body, the cage body is provided with window beams arranged at equal circumferential intervals, pockets adapted to the shape of balls are formed between adjacent window beams, one side of the pockets is open, and the inner wall of the pockets bends outward in a direction away from the center of the circle to form an outward flange, characterized in that, A support portion is provided on the outer side wall of the window beam. There is a deformation gap between the support portion and the outwardly turned edge, allowing the outwardly turned edge to bend and deform within the deformation gap to absorb the impact force of the ball. After the bending degree of the outwardly turned edge exceeds the deformation gap, it can abut against the support portion, and the support portion provides support for the outwardly turned edge to prevent it from being excessively bent, so as to improve the service life.

2. The thin-wall bearing cage according to claim 1, wherein, The thickness of the support portion along the radial direction is less than or equal to the length of the outwardly turned edge along the radial direction.

3. A thin-walled bearing cage according to claim 1, characterized in that, The support portion is a solid support rib provided on the outer wall of the window beam.

4. A thin-walled bearing cage according to claim 3, characterized in that The support rib is detachably provided on the outer wall of the window beam or integrally formed with the window beam.

5. A thin-walled bearing cage according to claim 1, characterized in that, The support portion is a convex portion naturally formed on the outer side of the window beam due to the inward concavity of the inner side area of the window beam towards the direction away from the center of the circle.

6. A thin-walled bearing cage according to claim 5, characterized in that, An oil storage space is formed in the inwardly concave area of the window beam.

7. A thin-walled bearing cage according to claim 5, characterized in that, Both side edges of the support portion are arc surfaces and are shape - adapted to the outwardly turned edge.

8. A thin-walled bearing cage according to claim 1, characterized in that, A plurality of oil - passing grooves are provided on the inner wall of the pocket hole to reduce the contact area between the ball and the inner wall of the pocket hole.

9. A thin-walled bearing cage according to claim 1, characterized in that, The distance between adjacent two window beams gradually decreases towards the direction away from the center of the circle.

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