A bearing with good sealing performance
By setting recesses on the outer sides of the inner and outer rings of the bearing and using sealing covers, the problem of lubricating grease leakage is solved, achieving high sealing performance and stable operation of the bearing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN MURAKAMI BEARING CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-05-26
AI Technical Summary
During use, existing bearings experience lubricant leakage due to the gap between the metal cover plate and the bearing inner ring, which affects the bearing's lifespan.
An inner ring recess and an outer ring recess are respectively set on the outer end face of the inner ring and the outer ring, and a sealing cover is placed between them. The sealing cover consists of a middle ring cover, an inner ring fixing cover and an outer ring fixing cover. Through the design of multiple sealing defenses, external impurities and moisture are blocked from entering, ensuring the sealing effect.
It effectively blocks external dust, impurities and moisture from entering, improves bearing sealing performance, ensures stable operation in harsh environments, prevents lubricating oil leakage, and extends bearing life.
Smart Images
Figure CN224283214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing technology, and in particular to a bearing with good sealing performance. Background Technology
[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during their movement, and ensure their rotational accuracy.
[0003] Most existing bearings use simple metal cover plates for shielding. These metal cover plates are fixed to the inside of the outer ring. In order for the bearing to rotate normally, there is a certain gap between the inner diameter of the metal cover plate and the inner ring of the bearing. During the use of the bearing, lubricating grease is prone to leakage, which greatly shortens the bearing life and is not conducive to the long-term use of the bearing. Utility Model Content
[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes a bearing with good sealing performance.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A bearing with good sealing performance includes an inner ring, an outer ring, and a plurality of balls. An inner ring countersunk and an outer ring countersunk are respectively provided on the outer end faces of the inner ring and the outer ring. A sealing cover is fitted between the inner ring countersunk and the outer ring countersunk. The sealing cover includes an intermediate ring cover, an inner ring fixing cover, and an outer ring fixing cover. A first annular groove is provided on the end face of the inner ring countersunk, and a second annular groove is provided on the end face of the outer ring countersunk. A first annular flange that mates with the first annular groove is provided on the inner edge of the intermediate ring cover, and a second annular flange that mates with the second annular groove is provided on the outer edge of the intermediate ring cover. The inner ring fixing cover is engaged on the inner ring countersunk to limit the intermediate ring cover, and the outer ring fixing cover is engaged on the outer ring countersunk to limit the intermediate ring cover.
[0007] In some embodiments, the inner ring fixing cover includes a first vertical ring, and a first limiting ring extending inward is provided at the outer end of the first vertical ring. The first vertical ring is engaged on the side wall of the inner ring recess, and the first limiting ring is provided on the outer side of the middle ring cover to restrict the middle ring cover from moving outward.
[0008] In some embodiments, the outer ring fixing cover includes a second vertical ring, and a second limiting ring extending outward is provided at the outer end of the second vertical ring. The second vertical ring is engaged on the side wall of the outer ring recess, and the second limiting ring is provided on the outside of the middle ring cover to restrict the middle ring cover from moving outward.
[0009] In some embodiments, positioning ring grooves are provided on the side walls of both the inner and outer ring recesses, and positioning flanges are provided on both the first and second vertical rings, with the positioning flanges being engaged within the positioning flanges.
[0010] In some embodiments, a third annular flange is provided at the edge of the inner ring recess, a fourth annular flange is provided at the edge of the outer ring recess, and a third annular groove that mates with the third annular flange and a fourth annular groove that mates with the fourth annular flange are provided on the middle ring cover.
[0011] In some embodiments, an annular notch is provided at the lower edge of both the first limiting ring and the second limiting ring.
[0012] In some embodiments, when the inner ring fixing cover is engaged with the inner ring recess, the inner ring fixing cover does not protrude from the inner ring.
[0013] In some embodiments, when the outer ring fixing cover is engaged with the outer ring countersunk platform, the outer ring fixing cover does not protrude from the outer ring.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. By setting inner ring countersunk and outer ring countersunk on the outer end faces of the inner and outer rings respectively, and covering them with a sealing cover; the sealing cover is composed of a middle ring cover, an inner ring fixing cover, and an outer ring fixing cover. The first annular flange on the inner edge of the middle ring cover is precisely matched with the first annular groove on the end face of the inner ring countersunk, and the second annular flange on the outer edge is tightly matched with the second annular groove on the end face of the outer ring countersunk, forming multiple sealing defenses. This ingenious design can effectively prevent external dust, impurities, and moisture from entering the bearing, greatly improving the sealing performance of the bearing and providing a solid guarantee for the stable operation of the bearing in harsh environments.
[0016] 2. In addition, the inner ring fixing cover is locked onto the inner ring recessed platform, and the outer ring fixing cover is locked onto the outer ring recessed platform. The two work together to securely limit the position of the middle ring cover, thus ensuring the stability of the sealing cover during long-term use and maintaining a good sealing effect. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.
[0019] Figure 3 This utility model Figure 2 Enlarged diagram of point A.
[0020] Figure 4 This is a partially exploded view of the present invention.
[0021] Figure 5 This is a schematic diagram of the structure of the sealing cover of this utility model. Detailed Implementation
[0022] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of this utility model and do not represent a specific relationship between the different embodiments and / or structures discussed.
[0023] like Figures 1-5 The bearing shown includes an inner ring 1, an outer ring 2, and a plurality of balls 3. An inner ring countersunk 11 and an outer ring countersunk 12 are respectively provided on the outer end faces of the inner ring 1 and the outer ring 2. A sealing cover 4 is fitted between the inner ring countersunk 11 and the outer ring countersunk 12. The sealing cover 4 includes an intermediate ring cover 5, an inner ring fixing cover 6, and an outer ring fixing cover 7. A first annular groove 8 is provided on the end face of the inner ring countersunk 11, and a second annular groove 9 is provided on the end face of the outer ring countersunk 12. A first annular flange 10 that mates with the first annular groove 8 is provided on the inner edge of the intermediate ring cover 5, and a second annular flange 100 that mates with the second annular groove 9 is provided on the outer edge of the intermediate ring cover 5. The inner ring fixing cover 6 is engaged on the inner ring countersunk 11 to limit the intermediate ring cover 5, and the outer ring fixing cover 7 is engaged on the outer ring countersunk 12 to limit the intermediate ring cover 5.
[0024] During assembly, the first annular flange 10 on the inner edge of the middle ring cover 5 of the sealing cover body 4 is inserted into the first annular groove 8 on the end face of the inner ring recess 11, and the second annular flange 100 on the outer edge is inserted into the second annular groove 9 on the end face of the outer ring recess 12. Then, the inner ring fixing cover 6 is snapped onto the inner ring recess 11, and the outer ring fixing cover 7 is snapped onto the outer ring recess 12 to complete the assembly.
[0025] When the assembly is complete, the inner ring fixing cover 6 does not protrude from the inner ring 1, and the outer ring fixing cover 7 does not protrude from the outer ring 2. This avoids interference such as collision and friction between the inner ring fixing cover 6 and the outer ring fixing cover 7 and other components during bearing installation and use, ensuring smooth bearing installation and stable operation.
[0026] When the bearing is running, the intermediate ring cover 5 moves slightly in sync with the inner or outer ring through the cooperation of the first annular flange 10 and the first annular groove 8, and the second annular flange 100 and the second annular groove 9. The inner ring fixing cover 6 and the outer ring fixing cover 7 restrict the position of the intermediate ring cover 5 from the inner and outer sides respectively to prevent it from shifting. The multiple cooperation forms a sealing barrier to block the entry of external debris and prevent internal lubricating oil leakage, providing a solid guarantee for the stable operation of the bearing in harsh environments.
[0027] See Figure 3 , Figure 5 As shown, the inner ring fixing cover 6 includes a first vertical ring 21, and a first limiting ring 22 extending inward is provided at the outer end of the first vertical ring 21. The first vertical ring 21 is engaged on the side wall of the inner ring recess 11, and the first limiting ring 22 is provided on the outer side of the middle ring cover 5 to restrict the middle ring cover 5 from moving outward.
[0028] The first vertical ring 21 of the inner ring fixing cover 6 is adapted to the side wall of the inner ring recess 11. The first vertical ring 21 is inserted into the side wall of the inner ring recess 11. At this time, the first limiting ring 22 extending inward from the outer end of the first vertical ring 21 is exactly on the outer side of the middle ring cover 5 and is close to the outer end face of the middle ring cover 5 for limiting.
[0029] Furthermore, the outer ring fixing cover 7 includes a second vertical ring 31, and a second limiting ring 32 extending outward is provided at the outer end of the second vertical ring 31. The second vertical ring 31 is engaged on the side wall of the outer ring recess 12, and the second limiting ring 32 is provided on the outside of the middle ring cover 5 to restrict the middle ring cover 5 from moving outward.
[0030] The second vertical ring 31 of the outer ring fixing cover 7 matches the side wall of the outer ring recess 12. The second vertical ring 31 is locked in the side wall of the outer ring recess 12. The second limiting ring 32, which extends outward from the outer end of the second vertical ring 31, is located on the outside of the middle ring cover 5 and is close to the outer end face of the middle ring cover 5 for limiting.
[0031] Positioning ring grooves 41 are provided on the side walls of the inner ring recess 11 and the outer ring recess 12, and positioning flanges 42 are provided on the first vertical ring 21 and the second vertical ring 31, and the positioning flanges 42 are engaged in the positioning flanges 42.
[0032] Thus, the engagement structure between the positioning flange 42 and the positioning ring groove 41 restricts the axial and circumferential movement of the inner ring fixing cover 6 and the outer ring fixing cover 7, making them firmly fixed on the sink platform.
[0033] In this utility model, a third annular flange 51 is provided on the edge of the inner ring recess 11, a fourth annular flange 52 is provided on the edge of the outer ring recess 12, and a third annular groove 53 that cooperates with the third annular flange 51 and a fourth annular groove 54 that cooperates with the fourth annular flange 52 are provided on the middle ring cover 5.
[0034] By adding the third annular flange 51 and the third annular groove 53, and the fourth annular flange 52 and the fourth annular groove 54, two more sealing barriers are formed on the basis of the original seal, which further increases the path length and difficulty for external debris to enter and internal lubricating oil to leak, while also enhancing the tightness of the fit between the intermediate ring cover and the platform.
[0035] Of course, it should be noted that the first annular flange 10 can rotate within the first annular groove 8, the second annular flange 100 can rotate within the second annular groove 9, the third annular flange 51 can rotate within the third annular groove 53, and the fourth annular flange 52 can rotate within the fourth annular groove 54.
[0036] See Figure 3 As shown, an annular notch 61 is provided at the lower edge of both the first limiting ring 22 and the second limiting ring 32.
[0037] The annular notch 61 facilitates the prying apart of the first limiting ring 22 and the second limiting ring 32.
[0038] Based on the accompanying drawings and the foregoing display and description of the basic principles, main features, and advantages of this utility model, those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A bearing with good sealing performance, comprising an inner ring (1), an outer ring (2), and a plurality of balls (3), characterized in that: An inner ring countersunk platform (11) and an outer ring countersunk platform (12) are respectively provided on the outer end faces of the inner ring (1) and the outer ring (2). A sealing cover (4) is fitted between the inner ring countersunk platform (11) and the outer ring countersunk platform (12). The sealing cover (4) includes an intermediate ring cover (5), an inner ring fixing cover (6) and an outer ring fixing cover (7). A first annular groove (8) is provided on the end face of the inner ring countersunk platform (11), and a second annular groove (8) is provided on the end face of the outer ring countersunk platform (12). The inner ring cover (5) has a first annular flange (10) that mates with the first annular groove (8) on its inner edge and a second annular flange (100) that mates with the second annular groove (9) on its outer edge. The inner ring fixing cover (6) is mounted on the inner ring countersunk platform (11) to limit the position of the middle ring cover (5). The outer ring fixing cover (7) is mounted on the outer ring countersunk platform (12) to limit the position of the middle ring cover (5).
2. The bearing with good sealing performance according to claim 1, characterized in that: The inner ring fixing cover (6) includes a first vertical ring (21), and a first limiting ring (22) extending inward is provided at the outer end of the first vertical ring (21). The first vertical ring (21) is engaged on the side wall of the inner ring sink (11), and the first limiting ring (22) is provided on the outer side of the middle ring cover (5) to restrict the middle ring cover (5) from moving outward.
3. The bearing with good sealing performance according to claim 2, characterized in that: The outer ring fixing cover (7) includes a second vertical ring (31), and a second limiting ring (32) extending outward is provided at the outer end of the second vertical ring (31). The second vertical ring (31) is engaged on the side wall of the outer ring sink (12), and the second limiting ring (32) is provided on the outside of the middle ring cover (5) to restrict the middle ring cover (5) from moving outward.
4. The bearing with good sealing performance according to claim 3, characterized in that: Positioning ring grooves (41) are provided on the side walls of the inner ring recess (11) and the outer ring recess (12), and positioning flanges (42) are provided on the first vertical ring (21) and the second vertical ring (31), and the positioning flanges (42) are engaged in the positioning flanges (42).
5. A bearing with good sealing performance according to claim 1, characterized in that: A third annular flange (51) is provided on the edge of the inner ring recess (11), a fourth annular flange (52) is provided on the edge of the outer ring recess (12), and a third annular groove (53) that mates with the third annular flange (51) and a fourth annular groove (54) that mates with the fourth annular flange (52) are provided on the middle ring cover (5).
6. A bearing with good sealing performance according to claim 3, characterized in that: An annular notch (61) is provided at the lower edge of both the first limiting ring (22) and the second limiting ring (32).
7. A bearing with good sealing performance according to claim 1, characterized in that: When the inner ring fixing cover (6) is engaged on the inner ring countersunk platform (11), the inner ring fixing cover (6) does not protrude from the inner ring (1).
8. A bearing with good sealing performance according to claim 1, characterized in that: When the outer ring fixing cover (7) is engaged on the outer ring countersunk platform (12), the outer ring fixing cover (7) does not protrude from the outer ring (2).