A bearing seal structure

Abstract

The utility model relates to bearing seal technical field, concretely relates to a sealing structure for bearing, including the outer ring, the inside central position of outer ring rotates and is installed with retainer, the inside of retainer is opened with steel ball groove, the inside activity of retainer steel ball groove is installed with ball bearing, the inside rotation of ball bearing is installed with inner ring, the left and right sides of outer ring are all opened with first clamping slot, the inside of two first clamping slots all is connected with snap ring, the outside of snap ring all is fixedly installed with the apron, the inside fixed mounting of apron has the plug ring, through apron, make sealing structure obtain stable installation reference, effectively avoid the sealing gap that split structure can produce, promote the integrity and sealed reliability of sealing structure, realize to sealing part's axial location, avoid the deflection of sealing structure when bearing rotates, guarantee bearing lubrication effect and service life.

Description

Technical Field

[0001] This utility model relates to the field of bearing sealing technology, and in particular to a sealing structure for bearings. Background Technology

[0002] As a core component of mechanical transmission systems, the operational stability and service life of bearings directly depend on the protective performance of the sealing structure. A good seal must simultaneously achieve the dual functions of preventing external contaminants from entering and locking in the internal lubricant. This is especially crucial in dusty, humid, or high-frequency vibration conditions such as mining, metallurgy, and food processing.

[0003] The prior art patent document CN207647981U discloses the following: This utility model discloses a bearing sealing structure, including a main body, a metal skeleton, and a covering layer. The covering layer wraps around the metal skeleton, and a groove is formed on the inner side of the metal skeleton. A sealing element is disposed in the groove, and multiple round holes are evenly distributed on the sealing element. A lip is provided around the metal skeleton, and the head of the lip is semi-circular. The beneficial effects of this utility model are: the structure is simple and robust; the combination of the sealing element and the lip effectively blocks the influence of environmental factors on the oil seal; at the same time, the round holes on the sealing element can play a certain labyrinth sealing role when the oil seal ages and wears and its sealing performance decreases, thus strengthening the overall sealing performance of the bearing and greatly improving its reliability and extending its service life.

[0004] Previous bearing sealing structures relied on a single snap-fit ​​or simple bonding method to fix the sealing components, lacking a precise matching and positioning structure with the bearing's outer ring, and failing to establish a stable installation benchmark through rigid connecting parts. Under the vibration and impact generated by bearing operation, the sealing components are prone to loosening, displacement, or even detachment from the bearing body, directly damaging the sealing barrier and leading to the intrusion of external contaminants and leakage of internal lubricating grease. Utility Model Content

[0005] The purpose of this invention is to provide a sealing structure for bearings to solve the problem of loosening of sealing components.

[0006] To achieve the above objectives, this utility model provides a bearing sealing structure, including an outer ring. A cage is rotatably mounted at the center of the inner side of the outer ring. A ball groove is formed on the inner side of the cage, and a ball is movably mounted inside the ball groove. An inner ring is rotatably mounted on the inner side of the ball. First slots are formed on both the left and right sides of the outer ring. A retaining ring is engaged on the inner side of each of the two first slots. A cover plate is fixedly mounted on the outer side of each retaining ring. A blocking ring is fixedly mounted on the inner side of each cover plate. The blocking ring is located between the cage and the inner ring. Two main retaining blocks are engaged on the inner side of the inner ring. A second retaining groove is formed on the outer side of each of the two main retaining blocks. The inner side of the cover plate is engaged inside the second retaining groove. A secondary retaining block is engaged between the upper and lower main retaining blocks.

[0007] The retaining ring and the first retaining groove are interference fit, and the retaining ring is made of elastic metal.

[0008] The cover plate and the blocking ring are integrally formed, and the inner wall of the blocking ring is fitted with the outer wall of the inner ring.

[0009] The width of the second slot is matched with the thickness of the inner side of the cover plate, and the cover plate and the second slot are in clearance fit.

[0010] The number of secondary card blocks is at least two, and the secondary card blocks are evenly distributed around the circumference of the main card block.

[0011] The number of ball grooves on the cage matches the number of balls, and the outer wall of the balls fits against the inner wall of the outer ring.

[0012] A gap is provided between the outer wall of the plugging ring and the inner wall of the retainer. Beneficial effects

[0013] Compared with existing technologies, it has the following advantages: 1. In this utility model, the cover plate enables the sealing structure to obtain a stable installation reference, effectively avoids the sealing gaps that may be generated by the split structure, improves the integrity and sealing reliability of the sealing structure, realizes axial limit of the sealing component, avoids the sealing structure from shifting when the bearing rotates, and ensures the bearing lubrication effect and service life.

[0014] 2. In this utility model, the main locking block and the secondary locking block enable the cover plate to achieve precise axial positioning, further enhance the installation stability of the sealing structure, improve the circumferential stability and structural strength of the main locking block, effectively prevent the main locking block from deforming or displacing under the radial force of the bearing, and ensure the long-term reliability of the connection between the sealing structure and the bearing body. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the external structure of an embodiment of the present utility model.

[0017] Figure 2 This is a top view of an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the present utility model.

[0019] Figure 4 This is an exploded structural diagram of the device according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the cover plate structure according to an embodiment of the present utility model.

[0021] In the diagram: 1. Outer ring; 2. Main locking block; 3. Secondary locking block; 4. Cover plate; 5. First locking groove; 6. Cage; 7. Ball bearing; 8. Inner ring; 9. Locking ring; 10. Blocking ring; 11. Second locking groove. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] Please see Figures 1 to 5This utility model provides a technical solution: a bearing sealing structure, including an outer ring 1, a retainer 6 rotatably mounted in the center of the outer ring 1, a ball groove on the inner side of the retainer 6, a ball 7 movably mounted inside the ball groove of the retainer 6, an inner ring 8 rotatably mounted inside the ball 7, first slots 5 on both the left and right sides of the outer ring 1, retaining rings 9 on the inner sides of the two first slots 5, a cover plate 4 fixedly mounted on the outer side of the retaining rings 9, a blocking ring 10 fixedly mounted on the inner side of the cover plate 4, the blocking ring 10 being located between the retainer 6 and the inner ring 8, a main locking block 2 on the inner side of the inner ring 8, two main locking blocks 2, a second locking groove 11 on the outer side of the two main locking blocks 2, the inner side of the cover plate 4 locking into the interior of the second locking groove 11, and a secondary locking block 3 locking between the upper and lower main locking blocks 2. First, the outer ring 1 serves as the structural load-bearing foundation. The cage 6, centrally mounted within the outer ring 1, provides movable support for the balls 7 through ball grooves, allowing the balls 7 to roll flexibly within the cage 6's constraints. This, in turn, enables the inner ring 8 to rotate smoothly relative to the outer ring 1, forming the core rotating mechanism of the bearing. Second, to achieve sealing protection, the first slots 5 on both sides of the outer ring 1 are used to position the retaining rings 9. The retaining rings 9 are fixedly connected to the cover plate 4, ensuring the cover plate 4 obtains a synchronous installation reference. The blocking ring 10 fixed inside the cover plate 4 is precisely embedded in the gap between the cage 6 and the inner ring 8, forming the first sealing barrier. Simultaneously, the two main retaining blocks 2, engaged inside the inner ring 8, engage with the inner side of the cover plate 4 through their outer second slots 11, further limiting and fixing the cover plate 4 to prevent the sealing structure from shifting during bearing rotation. The secondary retaining blocks 3 engaged between the upper and lower main retaining blocks 2 enhance the assembly stability of the main retaining blocks 2, ensuring the reliable connection between the overall sealing structure and the bearing body.

[0024] like Figures 1 to 5As shown, the retaining ring 9 and the first retaining groove 5 are interference fit, and the retaining ring 9 is made of elastic metal. The cover plate 4 and the blocking ring 10 are integrally formed structures, and the inner sidewall of the blocking ring 10 is in contact with the outer sidewall of the inner ring 8. The groove width of the second retaining groove 11 is adapted to the thickness of the inner side of the cover plate 4, and the cover plate 4 and the second retaining groove 11 are clearance fit. The number of secondary retaining blocks 3 is at least two, and the secondary retaining blocks 3 are evenly distributed along the circumference of the main retaining block 2. The number of steel ball grooves on the retainer 6 matches the number of balls 7, and the outer sidewall of the balls 7 is in contact with the inner sidewall of the outer ring 1. A gap is reserved between the outer sidewall of the blocking ring 10 and the inner sidewall of the retainer 6. The retaining ring 9 is made of elastic metal and has an interference fit with the first retaining groove 5. Utilizing the deformation capacity of the elastic metal, the retaining ring 9 is tightly engaged in the first retaining groove 5, ensuring a strong connection between the retaining ring 9 and the outer ring 1, and mitigating some of the loosening risk caused by vibration during long-term bearing use. The cover plate 4 and the plugging ring 10 are integrally formed, effectively avoiding gaps that can occur during assembly or use of separate structures, improving the integrity and reliability of the sealing structure. Furthermore, the inner wall of the plugging ring 10 fits snugly against the outer wall of the inner ring 8, maximizing the prevention of external dust and impurities from entering the bearing, while also preventing internal grease leakage. The width of the second retaining groove 11 matches the thickness of the inner side of the cover plate 4, and the two have a clearance fit. This ensures effective positioning of the cover plate 4 and the main retaining block 2, while also providing cover protection during bearing rotation. A small amount of space is provided between plate 4 and main clamping block 2 to avoid wear or increased rotational resistance caused by rigid contact; secondary clamping blocks 3 are evenly distributed around the circumference of main clamping block 2 and there are at least two of them. By uniformly applying force at multiple points, the circumferential stability of main clamping block 2 is enhanced, preventing deformation or displacement of main clamping block 2 under the radial force of the bearing; the number of ball grooves on cage 6 matches the number of balls 7, and the outer wall of ball 7 fits against the inner wall of outer ring 1, ensuring that ball 7 can uniformly bear the load and roll smoothly, ensuring the rotational performance of the bearing; a gap is reserved between the outer wall of plugging ring 10 and the inner wall of cage 6. This gap not only avoids frictional interference between plugging ring 10 and cage 6, ensuring the normal rotation of cage 6, but also forms a buffer area through the gap, further improving the protective effect of the sealing structure.

[0025] Working principle: The outer ring 1 serves as the load-bearing foundation of the entire bearing. The cage 6, precisely installed in the center of its interior, provides precise circumferential positioning and movement support for the balls 7 via pre-set ball grooves. This allows the balls 7 to roll flexibly within the ball grooves, thereby driving the inner ring 8 to achieve smooth and stable relative rotation with respect to the outer ring 1. This constitutes the core load transfer and rotation mechanism of the bearing. The sealing and protection function is achieved through the precise cooperation of multiple components. The first retaining grooves 5 on both sides of the outer ring 1 are used to accommodate retaining rings 9 made of elastic metal. The two adopt an interference fit design, utilizing the deformation characteristics of the elastic metal to tightly engage the retaining rings 9 within the first retaining grooves 5, ensuring both the retaining rings 9 and the outer ring... The connection of ring 1 ensures a strong connection and offsets the risk of loosening caused by vibration during bearing operation. At the same time, the fixed connection between the retaining ring 9 and the cover plate 4 provides a stable installation reference for the cover plate 4. The cover plate 4 and the inner plugging ring 10 adopt an integral molding structure, which effectively avoids the sealing gaps that may be generated during the assembly or use of the split structure, significantly improving the integrity and sealing reliability of the sealing structure. The plugging ring 10 is precisely embedded in the gap between the retainer 6 and the inner ring 8, and its inner wall is tightly fitted with the outer wall of the inner ring 8, which can block external dust, moisture, impurities and other contaminants from entering the bearing to the maximum extent, while preventing internal grease leakage and ensuring the lubrication effect and service life of the bearing. The two main locking blocks 2, which are engaged on the inner side of the inner ring 8, have second locking grooves 11 on their outer sides. The width of these grooves is precisely matched to the inner thickness of the cover plate 4, and the two are fitted with a clearance fit. This not only achieves axial positioning of the cover plate 4, preventing the sealing structure from shifting during bearing rotation, but also provides a small amount of play between the cover plate 4 and the main locking blocks 2, preventing wear or increased rotational resistance caused by rigid contact. The secondary locking blocks 3, which are engaged between the main locking blocks 2, are evenly distributed around the circumference of the main locking blocks 2, with at least two blocks. This multi-point uniform force enhances the circumferential stability of the main locking blocks 2, effectively preventing deformation or displacement of the main locking blocks 2 under the radial force of the bearing. The number of ball grooves on the cage 6 is the same as that of the balls 7. The number of balls is matched one-to-one, and the outer wall of the ball 7 fits tightly with the inner wall of the outer ring 1, ensuring that the ball 7 can uniformly bear radial and axial loads, while ensuring the smoothness of the rolling process and guaranteeing the overall rotational performance of the bearing. In addition, a reasonable gap is reserved between the outer wall of the plugging ring 10 and the inner wall of the cage 6. This gap not only avoids frictional interference between the plugging ring 10 and the cage 6, ensuring that the cage 6 rotates normally synchronously with the ball 7, but also forms a buffer area through the gap, further improving the protective effect of the sealing structure. Finally, through the optimized structural design and precise matching characteristics of each component, the bearing rotational performance, sealing reliability and assembly stability are synergistically balanced.

[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A sealing structure for a bearing, comprising an outer ring, characterized in that, A retainer is rotatably mounted at the center of the inner part of the outer ring. A ball groove is formed on the inner side of the retainer, and a ball is movably mounted inside the ball groove. An inner ring is rotatably mounted on the inner side of the ball. First slots are formed on both the left and right sides of the outer ring. A retaining ring is engaged on the inner side of each of the two first slots. A cover plate is fixedly mounted on the outer side of each retaining ring. A blocking ring is fixedly mounted on the inner side of each cover plate. The blocking ring is located between the retainer and the inner ring. Two main retaining blocks are engaged on the inner side of the inner ring. A second retaining slot is formed on the outer side of each of the two main retaining blocks. The inner side of the cover plate is engaged inside the second retaining slot. A secondary retaining block is engaged between the upper and lower main retaining blocks.

2. The bearing sealing structure according to claim 1, characterized in that, The retaining ring and the first retaining groove are interference fit, and the retaining ring is made of elastic metal.

3. The bearing sealing structure according to claim 1, characterized in that, The cover plate and the blocking ring are integrally formed, and the inner wall of the blocking ring fits into the outer wall of the inner ring.

4. The bearing sealing structure according to claim 1, characterized in that, The width of the second slot is matched with the thickness of the inner side of the cover plate, and the cover plate and the second slot are in clearance fit.

5. The bearing sealing structure according to claim 1, characterized in that, The number of secondary card blocks is at least two, and the secondary card blocks are evenly distributed around the circumference of the main card block.

6. The bearing sealing structure according to claim 1, characterized in that, The number of ball grooves on the cage matches the number of balls, and the outer wall of the balls fits against the inner wall of the outer ring.

7. The bearing sealing structure according to claim 1, characterized in that, A gap is provided between the outer wall of the plugging ring and the inner wall of the cage.

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