Bearing retainer with desilting function

Abstract

The utility model discloses a bearing retainer with a desilting function, and belongs to the field of retainers. According to the technical scheme, the bearing retainer with the sand discharging function 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 fit clearances used for sand discharging can be formed between the balls and the inner walls of the pockets. According to the utility model, the inner wall of the pocket forms the flow guide surface through the arrangement of the flow guide part, so that sand grains entering the fit clearance flow out of the fit clearance, and in addition, the width of the fit clearance along the airflow direction is reduced and then increased through the flow guide part positioned in the fit clearance, so that the kinetic energy of airflow is increased when the airflow passes through the fit clearance; and accumulated sand in the fit clearance is blown out through the acceleration effect of the airflow, and the sand discharging effect of the retainer body is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cages, and in particular relates to a bearing cage with a sand removal function. Background Art

[0002] The bearing cage with sand removal function 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. 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 with a sand removal function to solve at least one of the above technical problems.

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

[0006] A bearing retainer with a sand removal function comprises a retainer body, wherein pockets for accommodating balls are arranged at intervals in the circumferential direction of the retainer body, at least four support portions for supporting balls are symmetrically arranged along the circumference of the pockets, the four support portions abut against the balls so that a fitting gap for sand removal exists between the balls and the inner walls of the pockets, the inner walls of the pockets are provided with a guide portion, the guide portion is located within the fitting gap so that the width of the fitting gap is first reduced and then increased.

[0007] Preferably, the guide portion is two guide slopes inclined from the middle of the inner wall of the pocket hole toward both sides along the width direction of the pocket hole, and a V-shaped guide structure is formed between the two guide slopes so that the fitting gap width first decreases and then increases along the width direction of the pocket hole.

[0008] 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.

[0009] Preferably, the bosses are symmetrically arranged on the inner and outer sides of the retainer body.

[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 wind and sand in the environment enter the fitting gap along with the airflow, a guide surface is formed on the inner wall of the pocket due to the setting of the guide part. The guide surface can make the sand entering the fitting gap flow out of the fitting gap along the guide surface of the guide part under the action of centrifugal force or its own gravity. In addition, the width of the fitting gap along the airflow direction is first reduced and then increased by the guide part located in the fitting gap. Based on this form of fitting gap, when the airflow passes through the fitting gap, the kinetic energy of the airflow is increased, and then the accumulated sand in the fitting gap is blown out by the acceleration effect of the airflow, thereby increasing the sand removal effect of the retaining frame body. For the retaining frame body, the ball can be limitedly supported by the setting of four support parts to prevent the ball from falling off the pocket. Under the action of the support part, a first fitting gap and a 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 V-shaped guide structure formed by two guide slopes can increase the sand removal effect, prevent sand accumulation in the fitting gap, and accelerate the process of airflow passing through the fitting gap to blow away a small amount of accumulated sand in the fitting gap, thereby further improving the sand removal effect of the retaining frame body.

[0016] 3. 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.

[0017] 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.

[0018] 4. 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, and the retaining frame body can be bent so that its two ends are connected to form a closed ring.

[0019] 5. As a preferred embodiment of the present invention, the contact area of ​​each boss is in point contact with the ball. This design can further reduce the contact area between the ball and the contact area, thereby reducing the friction resistance between the two.

[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 front view of a specific implementation mode of the utility model;

[0022] Figure 2 A top view of a specific implementation of the utility model;

[0023] Figure 3 This is one of the partial structural schematic diagrams of the cage body proposed in the utility model;

[0024] Figure 4 For this utility model Figure 3 Middle AA section;

[0025] Figure 5 This is the second schematic diagram of the partial structure of the cage body proposed by the utility model;

[0026] Figure 6 For the utility model Figure 5 Middle BB cross section;

[0027] Figure 7 For the utility model Figure 6 Enlarged view of part C in the middle;

[0028] Figure 8 This is the third schematic diagram of the local structure of the retainer body proposed by the utility model.

[0029] 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.

[0030] In the attached picture:

[0031] 1. Cage body; 11. Ball; 2. Pocket; 201. Folding portion; 202. Fitting clearance; 3. Boss; 4. Flange. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Reference Figure 1-Figure 8 A bearing retainer with a sand removal function 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 a fitting gap 202 for sand removal is provided between the balls 11 and the inner wall of the pockets 2, and a guide portion is provided on the inner wall of the pockets 2, and the guide portion is located in the fitting gap 202 so that the width of the fitting gap is first reduced and then increased.

[0038] It is understood by those skilled in the art that the bearing retainer with sand removal function 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 wind and sand in the environment enter the fitting gap 202 with the airflow, a guide surface is formed on the inner wall of the pocket 2 due to the setting of the guide part. The guide surface can make the sand entering the fitting gap 202 flow out of the fitting gap 202 along the guide surface of the guide part under the action of centrifugal force or its own gravity. In addition, the width of the fitting gap 202 along the airflow direction is first reduced and then increased by the guide part located in the fitting gap 202. Based on this form of fitting gap 202, when the airflow passes through the fitting gap 202, the kinetic energy of the airflow is increased, and then the accumulated sand in the fitting gap 202 is blown out by the acceleration effect of the airflow, thereby increasing the sand removal effect of the retaining frame body 1. For the retaining frame body 1, the ball 11 can be limitedly supported by the setting of four support parts to prevent the ball 11 from falling off from the pocket 2. Under the action of the support part, a first fitting gap and a 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.

[0039] As a specific implementation of the guide portion, refer to Figure 4 The guide part is two guide slopes that are inclined from the middle of the inner wall of the pocket hole 2 toward both sides along the width direction of the pocket hole 2. A V-shaped guide structure is formed between the two guide slopes to reduce the width of the fit gap 202 first and then increase it along the width direction of the pocket hole 2. The V-shaped guide structure formed by the two guide slopes can increase the sand removal effect, prevent sand accumulation in the fit gap 202, and accelerate the process of airflow passing through the fit gap 202, so as to purge a small amount of accumulated sand in the fit gap 202, and further improve the sand removal effect of the retainer body 1.

[0040] As a specific implementation of the support portion, refer to Figure 5-Figure 8 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.

[0041] 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.

[0042] As a preferred embodiment of the cage body 1, refer to Figure 1-Figure 3 as well as Figure 5-Figure 8 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 retaining frame body 1.

[0043] 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.

[0044] As another preferred example of the support portion, refer to Figure 7 , the contact 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 contact area, thereby reducing the friction resistance between the two.

[0045] As a preferred example of the retainer body 1, refer to Figure 1-Figure 3 as well as Figure 5 , Figure 7 , Figure 8 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.

[0046] 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.

[0047] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0048] 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.

[0049] 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 with a sand removal function, 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 parts for supporting the ball (11) are symmetrically arranged along the circumference of the pocket hole (2), the four support parts abutting against the ball (11) so that a matching gap (202) for sand discharge is provided between the ball (11) and the inner wall of the pocket hole (2), and a guide part is provided on the inner wall of the pocket hole (2), the guide part is located in the matching gap (202) so that the width of the matching gap is first reduced and then increased.

2. A bearing retainer with sand removal function according to claim 1, characterized in that: The guide portion is two guide slopes inclined from the middle of the inner wall of the pocket hole (2) along the width direction of the pocket hole (2) toward both sides, and a V-shaped guide structure is formed between the two guide slopes so that the width of the fitting gap (202) first decreases and then increases along the width direction of the pocket hole (2).

3. The bearing retainer with sand removal function 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).

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

5. A bearing retainer with sand removal function 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 with sand removal function according to claim 3 or 4, characterized in that: The abutment area of ​​each boss (3) is in point contact with the rolling ball (11).

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

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