A deep groove ball bearing with good sealing performance

Abstract

This utility model belongs to the field of bearing application technology, and particularly relates to a deep groove ball bearing with good sealing performance. It includes an inner bearing ring, balls, a retainer, an outer bearing ring, and a sealing cap disposed between the inner and outer bearing rings. The inner wall of the outer bearing ring has an inner groove, and the outer wall of the inner bearing ring has an outer groove. The outer wall of the sealing cap has an insertion protrusion that mates with the inner groove, and the inner wall of the sealing cap has a connecting protrusion that mates with the outer groove. The inner wall of the outer bearing ring also has an auxiliary inner groove. This utility model achieves double sealing by adding an auxiliary locking groove to the existing locking groove, utilizing a double groove design. Simultaneously, the sealing gasket, without affecting rotation, impedes the flow of lubricating grease to a certain extent, thereby improving sealing performance and extending the bearing's service life.

Description

Technical Field

[0001] This utility model belongs to the field of bearing application technology, and in particular relates to a deep groove ball bearing with good sealing performance. Background Technology

[0002] Deep groove ball bearings are the most common and widely used type of rolling bearing. They are characterized by simple structure, reliable performance, and low cost. They are mainly used to bear radial loads, but can also bear certain bidirectional axial loads.

[0003] Existing deep groove ball bearings consist of an outer ring, an inner ring, steel balls, and a cage. Both the inner and outer rings have continuous deep groove raceways, in which the steel balls are embedded. The cage separates the steel balls, preventing direct friction between them, reducing wear, and maintaining a uniform distribution of the steel balls.

[0004] Considering the operating environment of some deep groove ball bearings (such as high dust levels), a sealing cap is added between the outer and inner rings. The existing sealing cap connection method is mainly snap-fit. Snap-fit ​​grooves are set on both sides of the raceway of the outer and inner rings and near the end face. The inner and outer walls of the sealing cap are inserted into the snap-fit ​​grooves to achieve a seal on the bearing.

[0005] While this type of sealing method can meet the sealing requirements to a certain extent, it requires lubricating grease to enter the snap-fit ​​groove during sealing. As the bearing is used, iron filings generated by friction will enter the lubricating grease. With continued use, this will cause the gap between the snap-fit ​​groove and the sealing cover to increase, thereby accelerating the entry of dust and reducing the service life of the bearing. Utility Model Content

[0006] This invention addresses the technical problems existing in the sealing of current deep groove ball bearings by proposing a deep groove ball bearing with good sealing performance that is reasonably designed, simple in structure, easy to process, and can improve the sealing effect and extend the service life of the bearing.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a deep groove ball bearing with good sealing performance, including an inner bearing ring, balls, a retainer, an outer bearing ring, and a sealing cap disposed between the inner and outer bearing rings. An inner groove is provided on the inner wall of the outer bearing ring, and an outer groove is provided on the outer wall of the inner bearing ring. An insertion protrusion ring that mates with the inner groove is provided on the outer wall of the sealing cap, and a connecting protrusion ring that mates with the outer groove is provided on the inner wall of the sealing cap. The outer bearing ring… An auxiliary inner groove is also provided on the inner wall of the bearing, and the auxiliary inner groove is located inside the inner groove. An auxiliary outer groove is provided on the outer wall of the bearing inner ring, and the auxiliary outer groove is located inside the outer groove. An auxiliary insertion protrusion ring that mates with the auxiliary inner groove is provided on the outer wall of the sealing cover. An auxiliary connecting protrusion ring that mates with the auxiliary outer groove is provided on the inner wall of the sealing cover. Sealing gaskets are provided in the grooves between the insertion protrusion ring and the auxiliary insertion protrusion ring, as well as in the grooves between the connecting protrusion ring and the auxiliary connecting protrusion ring.

[0008] Preferably, the depth of the auxiliary external groove is greater than the depth of the external groove.

[0009] Preferably, the height of the inner groove is less than the height of the auxiliary inner groove.

[0010] Preferably, the cross-section of the auxiliary connecting ring is U-shaped.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] This invention provides a deep groove ball bearing with good sealing performance. By adding an auxiliary snap-fit ​​groove to the existing snap-fit ​​groove, a double seal is achieved through the double groove design. At the same time, the sealing gasket, without affecting rotation, impedes the flow of lubricating grease to a certain extent, thereby improving the sealing performance and extending the service life of the bearing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A cross-sectional view of the deep groove ball bearing with good sealing performance provided in Example 1;

[0015] Figure 2 This is a schematic diagram of the bearing outer ring in a half-section state provided in Example 1;

[0016] Figure 3 This is a schematic diagram of the bearing inner ring in a half-section state provided in Example 1;

[0017] Figure 4 This is a schematic diagram of the structure of the sealing cap in a semi-sectional state as provided in Example 1;

[0018] In the above figures, 1. Bearing outer ring; 11. Inner groove; 12. Auxiliary inner groove; 2. Bearing inner ring; 21. Outer groove; 22. Auxiliary outer groove; 3. Retainer; 4. Ball; 5. Sealing cap; 51. Insertion convex ring; 52. Auxiliary insertion convex ring; 53. Connecting convex ring; 54. Auxiliary connecting convex ring; 6. Sealing gasket. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide 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 present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, such as Figures 1-4 As shown, this embodiment aims to provide a deep groove ball bearing with better sealing performance. Considering that the main problem with existing seals is the generation of iron filings due to friction, the entry of iron filings increases the gap between the sealing cover 5 and the retaining groove, leading to the entry of dust, further increasing friction, and thus causing more dust to enter, thereby affecting the service life. Therefore, reducing the entry of lubricating grease containing iron filings can extend the service life. To this end, the utility model provided in this embodiment provides a deep groove ball bearing with good sealing performance, including an inner ring 2, balls 4, a retainer 3, an outer ring 1, and a sealing cover 5 disposed between the inner ring 2 and the outer ring 1. An inner groove 11 is provided on the inner wall of the outer ring 1, and an outer groove 21 is provided on the outer wall of the inner ring 2. Since the sealing cover 5 is provided on both end faces of the bearing, there are two inner grooves 11 and two outer grooves 21, both located close to the end faces.

[0022] To achieve proper fit, an insertion protrusion 51 that mates with the inner groove 11 is provided on the outer side wall of the sealing cover 5, and a connecting protrusion 53 that mates with the outer groove 21 is provided on the inner side wall of the sealing cover 5. The above structure is a common existing structure, and therefore, it will not be described in detail in this embodiment.

[0023] Considering that the main purpose of reducing the flow of lubricating grease containing iron filings is to reduce friction, avoid increasing the gap, and thus reduce the entry of dust, a double structure is designed. In this way, if wear occurs, the inner structure will wear out first, thus delaying the entry of dust and improving service life. For this purpose, an auxiliary inner groove 12 is provided on the inner wall of the outer ring 1 of the bearing, and the auxiliary inner groove 12 is located inside the inner groove 11. An auxiliary outer groove 22 is provided on the outer wall of the inner ring 2 of the bearing, and the auxiliary outer groove 22 is located inside the outer groove 21. At the same time, an auxiliary insertion protrusion ring 52 that mates with the auxiliary inner groove 12 is provided on the outer wall of the sealing cover 5, and an auxiliary connecting protrusion ring 54 that mates with the auxiliary outer groove 22 is provided on the inner wall of the sealing cover 5. In this way, a double seal is formed.

[0024] To further reduce the flow of lubricating grease containing iron filings, in this embodiment, sealing gaskets 6 are provided in the grooves between the insertion protrusion ring 51 and the auxiliary insertion protrusion ring 52, and in the grooves between the connecting protrusion ring 53 and the auxiliary connecting protrusion ring 54. The sealing gaskets 6 are made of rubber or silicone and are used to seal the reciprocating motion of the piston in the cylinder. Therefore, their placement does not affect the rotation of the inner or outer ring, but rather acts as a barrier to reduce iron filings, thereby increasing friction time and improving service life.

[0025] To further improve the sealing effect, in this embodiment, the depth of the auxiliary outer groove 22 is set to be greater than the depth of the outer groove 21. Simultaneously, the cross-section of the auxiliary connecting convex ring 54 is U-shaped. This is because, during bearing operation, the inner ring typically rotates. Therefore, in existing designs, the gap between the connecting convex ring 53 and the outer groove 21 is relatively large to meet rotational requirements. However, by setting the depth of the auxiliary outer groove 22 to be greater than the outer groove 21, more lubricating grease containing iron filings can be stored, extending the time it takes for the grease to enter the outer groove 21. Furthermore, since existing sealing covers 5 are made of plastic, the U-shaped design provides them with a certain degree of elasticity, reducing the gap between the cover and the auxiliary outer groove 22 without affecting the rotation of the inner ring, thereby reducing the entry of lubricating grease containing iron filings.

[0026] Similarly, to improve the sealing effect and extend the flow distance of the lubricating grease containing iron filings, in this embodiment, the height of the inner groove 11 is set to be less than the height of the auxiliary inner groove 12. This increases the distance between the two grooves and, at the same time, creates an interlocking effect between the two grooves, thus preventing dust from entering.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A deep groove ball bearing with good sealing performance, comprising an inner ring, balls, a cage, an outer ring, and a sealing cap disposed between the inner ring and the outer ring, wherein an inner groove is provided on the inner wall of the outer ring, an outer groove is provided on the outer wall of the inner ring, an insertion protrusion is provided on the outer wall of the sealing cap to mate with the inner groove, and a connecting protrusion is provided on the inner wall of the sealing cap to mate with the outer groove, characterized in that, An auxiliary inner groove is provided on the inner wall of the outer ring of the bearing, and the auxiliary inner groove is located inside the inner groove. An auxiliary outer groove is provided on the outer wall of the inner ring of the bearing, and the auxiliary outer groove is located inside the outer groove. An auxiliary insertion protrusion ring that mates with the auxiliary inner groove is provided on the outer wall of the sealing cover. An auxiliary connecting protrusion ring that mates with the auxiliary outer groove is provided on the inner wall of the sealing cover. Sealing gaskets are provided in the grooves between the insertion protrusion ring and the auxiliary insertion protrusion ring, as well as in the grooves between the connecting protrusion ring and the auxiliary connecting protrusion ring.

2. The deep groove ball bearing with good sealing performance according to claim 1, characterized in that, The depth of the auxiliary external groove is greater than the depth setting of the external groove.

3. The deep groove ball bearing with good sealing performance according to claim 2, characterized in that, The height of the inner groove is less than the height of the auxiliary inner groove.

4. The deep groove ball bearing with good sealing performance according to claim 3, characterized in that, The auxiliary connecting ring has a U-shaped cross-section.

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