Bearing retainer

Abstract

The utility model discloses a bearing retainer and belongs to the field of retainers. According to the technical scheme, the bearing retainer comprises a retainer body, pockets used for containing balls are formed in the retainer body at intervals in the circumferential direction, and at least four supporting parts used for supporting the balls are symmetrically arranged in the circumferential direction of the pockets. The four supporting parts abut against the balls so that two first fit clearances and two second fit clearances can be formed between the balls and the inner walls of the pockets, the width of the first fit clearances is larger than that of the second fit clearances, and sand discharging grooves are formed in the inner walls of the pockets. The sand discharging groove is located in the second fit clearance area so that sand entering the second fit clearance can be guided into the first fit clearance. Through the arrangement of the first fit clearance, the second fit clearance and the sand discharge groove, sand grains between the balls and the pockets can be discharged, and the abrasion of the sand grains to the pockets and the balls is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of retainers, and in particular relates to a bearing retainer. Background Art

[0002] The bearing cage is used to partially wrap all or part of the rolling elements and is a bearing part that moves with it, to isolate the rolling elements, and usually guide the rolling elements and keep them in the bearing. Bearings are commonly used parts in machinery, used to reduce friction resistance during the rotation of the mechanical shaft and ensure rotation accuracy. In the field of photovoltaic power generation, in order to ensure that the photovoltaic panels can receive the maximum amount of light, it is necessary to adjust the direction of the photovoltaic panels in real time according to the sun's angle of illumination. The mechanical structure used to control the rotation angle of the photovoltaic panels includes several bearings.

[0003] Large-scale photovoltaic power generation is generally deployed in open areas, such as deserts. Although this environment is conducive to photovoltaic panels receiving sunlight, the windy and sandy environment in the desert will affect the normal operation of the bearings in the mechanical mechanism used to control the rotation angle of the photovoltaic panels. The wind and sand in the environment will enter the bearings with the air. Since the existing cage does not have a sand discharge structure, the sand will remain in the fitting gap between the cage pocket and the ball. During the rotation of the ball, the sand will cause wear on the ball and the inner wall of the cage pocket, increase the friction coefficient between the cage and the ball, and reduce the service life of both. Utility Model Content

[0004] The utility model provides a bearing retainer to solve at least one of the above technical problems.

[0005] The technical solution adopted by the utility model is:

[0006] A bearing retainer comprises a retainer body, wherein the retainer body is provided with pockets for accommodating balls at intervals in the circumferential direction, and at least four support portions for supporting the balls are symmetrically arranged along the circumference of the pockets, the four support portions abut against the balls to form two first fitting gaps and two second fitting gaps between the balls and the inner walls of the pockets, the gap width of the first fitting gaps being greater than the gap width of the second fitting gaps, the inner wall of the pockets being provided with a sand removal groove, and the sand removal groove being located in the second fitting gap region to guide sand particles entering the second fitting gap into the first fitting gap.

[0007] Preferably, the support portion is symmetrically distributed on the bosses on both sides of the pocket, and both ends of each boss have abutment areas abutting against the outer wall of the ball.

[0008] Preferably, the bosses are symmetrically arranged on the inner and outer sides of the retainer body.

[0009] Preferably, the sand discharge trough has a V-shaped groove, and the depth of the V-shaped groove gradually decreases from the middle to both ends.

[0010] Preferably, there is a folded portion between adjacent pockets, and the folded portion is composed of cutting grooves opened on both sides of the inner and outer sides of the retainer body.

[0011] Preferably, the abutting area of ​​each boss is in point contact with the ball.

[0012] Preferably, the retainer body is provided with flanges, and the flanges are distributed on both sides of the pocket.

[0013] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0014] 1. In the present application, when the wind and sand in the environment enter the first fitting gap and the second fitting gap with the airflow, the sand particles entering the first fitting gap will enter from one side of the first fitting gap and flow out from the other side with the airflow due to the large width of the first fitting gap, and will not stay in the first fitting gap to cause wear on the ball and the pocket. The sand particles entering the second fitting gap will be gathered in the sand discharge groove in the second fitting gap area. During the movement of the ball or the retainer body, the sand particles gathered in the sand discharge groove are guided to the first fitting gap through the sand discharge groove and finally discharged from the first fitting gap. For the retainer body, the ball can be limitedly supported by setting four support parts to prevent the ball from falling off the pocket. Under the action of the support parts, the first fitting gap and the second fitting gap are formed between the ball and the pocket, which can effectively reduce the contact area between the ball and the pocket, thereby reducing the friction resistance.

[0015] 2. As a preferred embodiment of the utility model, the lateral width of the retaining frame body can be increased by setting the boss, and the ball can be limited by four abutment areas formed by the two bosses, which can improve the stability of the ball posture. At the same time, the structural strength of the retaining frame body can be increased by setting the boss, and the service life of the retaining frame body can be increased.

[0016] 3. As a preferred embodiment of the utility model, the bosses are symmetrically arranged on the inner and outer sides of the cage body. This design can further increase the structural strength of the cage body. At the same time, the four bosses on both sides of the cage body can provide a total of 8 abutment areas for the ball, further increasing the limiting effect on the ball and further ensuring the stability of the ball's rotation posture.

[0017] Furthermore, the contact area of ​​each boss is in point contact with the ball, and this design can further reduce the contact area between the ball and the contact area, thereby reducing the friction resistance between the two.

[0018] 4. As a preferred embodiment of the utility model, the V-shaped groove in the sand discharge trough has a depth that gradually decreases from the middle to both ends. This design of the sand discharge trough can increase the flow-conducting capacity of the sand discharge trough, thereby allowing the sand particles collected in the sand discharge trough to be discharged quickly, thereby improving the sand discharge effect and efficiency of the sand discharge trough.

[0019] 5. As a preferred embodiment of the utility model, the angle between any two adjacent pockets can be properly adjusted by setting the folding portion, and the retaining frame body can be bent to adapt to bearings of different diameters by the folding portion. The retaining frame body can be bent so that its two ends are connected to form a closed ring.

[0020] 6. As a preferred embodiment of the present invention, the structure around the pocket is strengthened by means of a flange in cooperation with a boss, thereby preventing the pocket from deforming. At the same time, the arrangement of the flange facilitates increasing the strength of the overall structure of the retainer body and improving the service life of the retainer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the cage proposed by the utility model;

[0022] Figure 2 For this utility model Figure 1 A magnified view of part A;

[0023] Figure 3 This is one of the structural schematic diagrams of a specific implementation method of the utility model;

[0024] Figure 4 This is the second structural schematic diagram of a specific implementation method of the utility model.

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] In the attached picture:

[0027] 1. Cage body; 11. Ball; 2. Pocket; 201. Folding part; 3. Boss; 4. Sand discharge groove; 5. Flange. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0030] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, the first feature "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 in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0033] Reference Figure 1-4 A bearing retainer comprises a retainer body 1, wherein the retainer body 1 is provided with pockets 2 for accommodating balls 11 at intervals in the circumferential direction, and at least four supporting portions for supporting the balls 11 are symmetrically arranged along the circumference of the pockets 2, wherein the four supporting portions abut against the balls 11 so that two first fitting gaps and two second fitting gaps are formed between the balls 11 and the inner walls of the pockets 2, wherein the gap width of the first fitting gap is greater than the gap width of the second fitting gap, and a sand discharge groove 4 is provided on the inner wall of the pockets 2, and the sand discharge groove 4 is located in the second fitting gap region so as to guide the sand entering the second fitting gap into the first fitting gap.

[0034] Those skilled in the art can understand that the bearing retainer is used to partially wrap all or part of the rolling elements and the bearing parts that move with it, to isolate the rolling elements, and usually guide the rolling elements and keep them in the bearings. Bearings are commonly used parts in machinery, used to reduce the friction resistance during the rotation of the mechanical shaft and ensure the rotation accuracy. Among them, in the field of photovoltaic power generation, in order to ensure that the photovoltaic panels can receive the maximum amount of light, it is necessary to adjust the direction of the photovoltaic panels in real time according to the sun's angle of illumination, and the mechanical structure used to control the rotation angle of the photovoltaic panels includes several bearings. Large-scale photovoltaic power generation is generally deployed in open areas, such as deserts. Although this environment is conducive to photovoltaic panels receiving sunlight, the windy and sandy environment in the desert will affect the normal operation of the bearings in the mechanical mechanism used to control the rotation angle of the photovoltaic panels. The wind and sand in the environment will enter the bearing with the air and stay in the first fitting clearance and the second fitting clearance between the pocket 2 of the retaining frame body 1 and the ball 11. During the rotation of the ball 11, the sand will cause wear to the ball 11 and the inner wall of the pocket 2 of the retaining frame body 1, thereby increasing the friction coefficient between the retaining frame body 1 and the ball 11 and reducing the service life of both. When the wind and sand in the environment enter the first fitting gap and the second fitting gap with the airflow, the sand particles entering the first fitting gap will flow out from one side of the first fitting gap and the other side due to the large width of the first fitting gap. The sand particles will not stay in the first fitting gap to cause wear to the ball 11 and the pocket 2. The sand particles entering the second fitting gap will be collected in the sand discharge groove 4 in the second fitting gap area. During the movement of the ball 11 or the retainer body 1, the sand particles collected in the sand discharge groove 4 are guided to the first fitting gap through the sand discharge groove 4 and finally discharged from the first fitting gap. For the retainer body 1, the ball 11 can be limitedly supported by the arrangement of four support parts to prevent the ball 11 from falling off the pocket 2. Under the action of the support parts, the first fitting gap and the second fitting gap are formed between the ball 11 and the pocket 2, which can effectively reduce the contact area between the ball 11 and the pocket 2, thereby reducing the friction resistance.

[0035] As a specific implementation of the support portion, refer to Figure 1-4 The supporting parts are symmetrically distributed on the bosses 3 on both sides of the pocket 2, and both ends of each boss 3 have abutment areas that abut against the outer wall of the ball 11. The lateral width of the cage body 1 can be increased by setting the bosses 3, and the ball 11 can be limited by the four abutment areas formed by the two bosses 3, which can improve the stability of the posture of the ball 11. At the same time, the structural strength of the cage body 1 can be increased by setting the bosses 3, and the service life of the cage body 1 can be increased.

[0036] Furthermore, the bosses 3 are symmetrically arranged on the inner and outer sides of the cage body 1. This design can further increase the structural strength of the cage body 1. At the same time, the four bosses 3 located on both sides of the cage body 1 can provide a total of 8 abutment areas for the ball 11, further increasing the limiting effect on the ball 11 and further ensuring the stability of the rotation posture of the ball 11.

[0037] As a preferred example of the sand discharge groove 4, the sand discharge groove 4 has a V-shaped groove, and the depth of the V-shaped groove gradually decreases from the middle to the two ends. This design of the sand discharge groove 4 can increase the flow conduction capacity of the sand discharge groove 4, thereby allowing the sand collected in the sand discharge groove 4 to be quickly discharged, thereby improving the sand discharge effect and efficiency of the sand discharge groove 4.

[0038] As a preferred embodiment of the cage body 1, refer to Figure 2-Figure 4 There is a folding portion 201 between adjacent pocket holes 2, and the folding portion 201 is composed of cutting grooves opened on both sides of the inner and outer sides of the retainer body 1.

[0039] The folding portion 201 can be provided so that the angle between any two adjacent pockets 2 can be properly adjusted. The folding portion 201 can be used to bend the retainer body 1 to adapt to bearings of different diameters. The retainer body 1 can be bent so that its two ends are connected to form a closed ring.

[0040] As another preferred example of the supporting portion, the abutment area of ​​each boss 3 is in point contact with the ball 11. This design can further reduce the contact area between the ball 11 and the abutment area, thereby reducing the friction resistance between the two.

[0041] As a preferred example of the retainer body 1, referring to FIG. Figure 2-Figure 4 A flange 5 is provided on the retainer body 1, and the flange 5 is distributed on both sides of the pocket 2. The structure around the pocket 2 is strengthened by the flange 5 and the boss 3, thereby preventing the pocket 2 from deforming. At the same time, the setting of the flange 5 is convenient for increasing the strength of the overall structure of the retainer body 1 and improving the service life of the retainer body 1.

[0042] It should also be noted that the cage body 1 is made of 08 and 10 high-quality carbon steel sheets by cold stamping, and the cage body 1 is subjected to heat treatment to eliminate stress and restore plasticity, including high-temperature tempering, recrystallization annealing, etc. In order to reduce the friction coefficient of the cage body 1, the surface of the finished cage must be polished if necessary.

[0043] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0044] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0045] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A bearing cage, comprising a cage body (1), wherein pockets (2) for accommodating balls (11) are arranged at intervals in the circumferential direction of the cage body (1), characterized in that: At least four support portions for supporting the ball (11) are symmetrically arranged along the circumference of the pocket hole (2); the four support portions abut against the ball (11) so as to form two first fitting gaps and two second fitting gaps between the ball (11) and the inner wall of the pocket hole (2); the gap width of the first fitting gap is greater than the gap width of the second fitting gap; the inner wall of the pocket hole (2) is provided with a sand discharge groove (4); the sand discharge groove (4) is located in the second fitting gap area so as to guide sand particles entering the second fitting gap into the first fitting gap.

2. A bearing retainer according to claim 1, characterized in that: The support portion comprises bosses (3) symmetrically distributed on both sides of the pocket hole (2), and both ends of each boss (3) have abutment areas abutting against the outer wall of the ball (11).

3. A bearing retainer according to claim 2, characterized in that: The bosses (3) are symmetrically arranged on both inner and outer sides of the retainer body (1).

4. A bearing retainer according to claim 1, characterized in that: The sand discharge groove (4) has a V-shaped groove in its interior, and the depth of the V-shaped groove gradually decreases from the middle to both ends.

5. A bearing retainer according to any one of claims 1 to 4, characterized in that: A folding portion (201) is provided between adjacent pocket holes (2), and the folding portion (201) is composed of cutting grooves opened on both sides of the inner and outer sides of the retaining frame body (1).

6. A bearing retainer according to claim 2 or 3, characterized in that: The abutment area of ​​each boss (3) is in point contact with the rolling ball (11).

7. A bearing retainer according to any one of claims 1 to 4, characterized in that: The retainer body (1) is provided with a flange (5), and the flange (5) is distributed on both sides of the pocket hole (2).

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