A high-sealing deep groove ball bearing

Abstract

This invention provides a high-sealing deep groove ball bearing, comprising an outer ring, an inner ring, a seal, and a retaining ring. Balls are disposed between the outer and inner rings. External mounting ring grooves are provided on both sides of the outer ring, and internal mounting ring grooves are provided on both sides of the inner ring. The seal is disposed between the external and internal mounting ring grooves. The seal includes an outer sealing ring body and an inner sealing ring body, with a connecting body between them. A first sealing lip is provided on the inner ring surface of the inner sealing ring body, and a second sealing lip is provided on the side of the inner sealing ring body closer to the ball. The retaining ring limits the seal and applies elastic pressure towards the ball. This invention employs a combination of interference fit and a retaining ring for limiting the seal, effectively preventing it from falling off and causing seal failure under high load and strong vibration conditions.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a high-sealing deep groove ball bearing. Background Technology

[0002] Deep groove ball bearings consist of an inner ring, an outer ring, and balls. Both the inner and outer rings have deep groove raceways within which the balls roll to transmit load.

[0003] Sealed deep groove ball bearings typically have a sealing ring installed between the outer and inner rings. This sealing structure isolates external dust, particles, and other contaminants, preventing contaminants from entering the raceway and causing wear or jamming, thus ensuring stable bearing operation. However, existing sealed deep groove ball bearings still have the following shortcomings in practical applications: 1. Insufficient reliability of the seal installation and fixation. Under high load and strong vibration conditions, the seal is prone to detachment, directly leading to seal failure; 2. Poor sealing durability and protective effect of the sealing structure. With long-term friction and wear during use, the sealing performance of the seal will significantly decrease, and external contaminants can still penetrate the sealing gap and enter the raceway, affecting the bearing's service life and operating accuracy. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a high-sealing deep groove ball bearing.

[0005] The purpose of this utility model is achieved through the following technical solution: a high-sealing deep groove ball bearing, comprising an outer ring, an inner ring, a seal, and a limiting ring. Balls are disposed between the outer and inner rings. External mounting ring grooves are provided on both sides of the outer ring, and internal mounting ring grooves are provided on both sides of the inner ring. The seal is disposed between the external and internal mounting ring grooves. The seal comprises an outer sealing ring body and an inner sealing ring body, with a connecting body between them. The outer sealing ring body is interference-fitted with the external mounting ring groove. A first sealing lip is provided on the inner ring surface of the inner sealing ring body, and a second sealing lip is provided on the side of the inner sealing ring body closer to the ball direction. The limiting ring is connected to the outer ring, limiting the seal and applying elastic pressure towards the ball direction.

[0006] Preferably, the sealing element is provided with a supporting skeleton.

[0007] Preferably, the cross-section of the support frame is "L" shaped, and the support frame is embedded in the outer sealing ring and the connecting body.

[0008] Preferably, the limiting ring includes a limiting ring body, which is located on the side of the seal away from the ball; a plurality of spring-loaded plates are provided on the inner side of the limiting ring body, one end of the spring-loaded plates is connected to the limiting ring body, and the other end of the spring-loaded plates is in contact with the inner sealing ring body; a fixing mechanism is provided between the limiting ring body and the outer ring of the bearing.

[0009] Preferably, the fixing mechanism includes an annular groove disposed on the outer ring of the bearing and an elastic retaining flap disposed on the main body of the limiting ring and cooperating with the annular groove.

[0010] Preferably, the limiting ring is made of spring steel.

[0011] Preferably, the spring pressure plate is arc-shaped.

[0012] The beneficial effects of this utility model are: 1. This utility model adopts a combination of interference fit and limiting ring for limiting. On the one hand, the outer sealing ring of the seal and the outer mounting ring groove of the bearing outer ring are interference fit, which makes the outer sealing ring of the seal and the mounting groove wall form a tight and fixed relationship. On the other hand, the limiting ring is directly connected to the bearing outer ring, and the limiting ring forms an axial limit on the seal to prevent it from falling off along the bearing axis. Thus, it has a good anti-fall-off effect on the seal and avoids the problem of seal failure caused by the seal falling off under high load and strong vibration conditions.

[0013] 2. The first and second sealing lips on the inner sealing ring form a double sealing defense, which greatly improves the sealing effect and reliability compared to the traditional single-lip sealing structure. Furthermore, the limiting ring applies elastic pressure towards the ball bearing to the seal through its elastic structure. This elastic pressure continuously acts on the seal, ensuring that the second sealing lip maintains stable contact pressure with the mating surface (the side of the inner mounting ring groove) under this pressure. Even if the seal experiences frictional wear during long-term use, the elastic pressure can drive the second sealing lip to adaptively compensate for the wear, maintaining a stable sealing contact state, increasing the effective lifespan of the seal, and ensuring the sealing effectiveness of the deep groove ball bearing during long-term operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is an exploded view of the present invention.

[0016] Figure 3 This is a cross-sectional view of the seal.

[0017] Figure 4 for Figure 3Enlarged view of section A.

[0018] Figure 5 This is a schematic diagram of the limiting ring structure.

[0019] Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0020] Figure 7 This is a cross-sectional view of the present invention.

[0021] Figure 8 for Figure 7 Enlarged view of section D in the middle.

[0022] In the diagram: 1. Bearing outer ring; 1-1. Outer mounting ring groove; 1-2. Annular groove; 2. Bearing inner ring; 2-1. Inner mounting ring groove; 3. Seal; 3-1. Outer sealing ring body; 3-2. Inner sealing ring body; 3-3. Connector; 3-4. Support frame; 3-5. First sealing lip; 3-6. Second sealing lip; 4. Limiting ring; 4-1. Limiting ring body; 4-2. Elastic pressure plate; 4-3. Elastic retaining flap; 5. Ball bearing. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0024] like Figures 1 to 8 As shown, a high-sealing deep groove ball bearing includes an outer ring 1, an inner ring 2, a seal 3, and a retaining ring 4. Balls 5 are disposed between the outer ring 1 and the inner ring 2. External mounting ring grooves 1-1 are provided on both sides of the outer ring 1, and internal mounting ring grooves 2-1 are provided on both sides of the inner ring 2. The seal 3 is disposed between the external mounting ring grooves 1-1 and 2-1; the seal 3 includes an outer sealing ring body 3-1 and an inner sealing ring body 3-2. A connecting body 3-3 is provided between the outer sealing ring 3-1 and the inner sealing ring 3-2. The outer sealing ring 3-1 is interference-fitted with the outer mounting ring groove 1-1. A first sealing lip 3-5 is provided on the inner ring surface of the inner sealing ring 3-2, and a second sealing lip 3-6 is provided on the side of the inner sealing ring 3-2 near the ball 5. The limiting ring 4 is connected to the outer ring 1 of the bearing. The limiting ring 4 limits the sealing element 3 and applies elastic pressure to the sealing element 3 in the direction of the ball 5.

[0025] In this invention, the outer sealing ring 3-1 is interference-fitted with the outer mounting ring groove 1-1. Static sealing is achieved through the interference fit between the sealing element 3 and the outer mounting ring groove 1-1. When the bearing rotates, the outer sealing element 3 rotates synchronously with the outer ring 1 of the bearing. The inner sealing ring 3-2 has a first sealing lip 3-5 and a second sealing lip 3-6. Dynamic sealing is achieved between the sealing element 3 and the inner ring 2 of the bearing through the contact fit between the first sealing lip 3-5 and the second sealing lip 3-6 and the groove wall of the inner mounting ring groove 2-1. When the bearing rotates, the sealing element 3 and the inner ring 2 rotate relative to each other.

[0026] This utility model adopts a combination of interference fit and limiting ring 4 for limiting. On the one hand, the outer sealing ring 3-1 of the seal 3 and the outer mounting ring groove 1-1 of the bearing outer ring 1 are interference fit, which makes the outer sealing ring 3-1 of the seal 3 and the mounting groove wall form a tight and fixed relationship. On the other hand, the limiting ring 4 is directly connected to the bearing outer ring 1, and the limiting ring 4 forms an axial limit on the seal 3 to prevent it from falling off along the bearing axis. Thus, the seal 3 has a good anti-fall-off effect, avoiding the problem of seal failure caused by the seal 3 falling off under high load and strong vibration conditions.

[0027] The first sealing lip 3-5 and the second sealing lip 3-6 on the inner sealing ring 3-2 form a double sealing defense line. Compared with the traditional single-lip sealing structure, the sealing effect and reliability of this invention are greatly improved. Furthermore, the limiting ring 4 applies elastic pressure to the seal 3 towards the ball 5 through its elastic structure. This elastic pressure continuously acts on the seal 3, ensuring that the second sealing lip 3-6 maintains a stable contact pressure with the mating surface (the side of the inner mounting ring groove 2-1) under this elastic pressure. Even if the seal 3 experiences frictional wear during long-term use, the elastic pressure can drive the second sealing lip 3-6 to adaptively compensate for the wear, maintaining a stable sealing contact state, preventing the sealing gap from widening due to wear, significantly reducing the rate of sealing performance degradation, increasing the effective lifespan of the seal 3, and ensuring the sealing effectiveness and operational accuracy of the deep groove ball bearing during long-term operation.

[0028] A support frame 3-4 is provided inside the seal 3. The support frame 3-4 has an "L"-shaped cross-section and is embedded within the outer sealing ring 3-1 and the connecting body 3-3. In this embodiment, the support frame 3-4 is supported by an alloy material. Under the support of the support frame 3-4, a reliable interference fit can be maintained between the outer sealing ring 3-1 of the seal 3 and the outer ring 1 of the bearing.

[0029] The limiting ring 4 includes a limiting ring body 4-1, which is located on the side of the seal 3 away from the ball 5. Several spring-loaded plates 4-2 are arranged on the inner side of the limiting ring body 4-1, and each spring-loaded plate 4-2 is arc-shaped. One end of each spring-loaded plate 4-2 is connected to the limiting ring body 4-1, and the other end contacts the inner sealing ring body 3-2. A fixing mechanism is provided between the limiting ring body 4-1 and the outer ring 1 of the bearing. By assembling and positioning with the outer ring 1 of the bearing, the limiting ring body 4-1 directly prevents the seal 3 from dislodging outward along the bearing axis, structurally restricting the axial displacement freedom of the seal 3. This solves the problem of the seal 3 easily falling off due to the lack of effective axial constraint in traditional bearings, ensuring the stability of the seal 3 installation. One end of the elastic pressure plate 4-2 is connected to the limiting ring body 4-1, and the other end is in contact with the inner sealing ring body 3-2. Several elastic pressure plates 4-2 are distributed in a ring array on the inner side of the limiting ring body 4-1, which can apply uniform elastic pressure to the inner sealing ring body 3-2 in the direction of the ball 5. This elastic pressure ensures that the second sealing lip 3-6 of the seal 3 always keeps in close contact with the mating surface (the side arm of the inner mounting ring groove 2-1).

[0030] The fixing mechanism includes an annular groove 1-2 on the outer ring 1 of the bearing and an elastic retaining flap 4-3 on the limiting ring body 4-1 that cooperates with the annular groove 1-2. One end of the elastic retaining flap 4-3 protrudes outward from the limiting ring body 4-1. The limiting ring 4 is installed between the outer ring 1 and the inner ring 2 of the bearing by press fitting. After the limiting ring 4 is pressed between the outer ring 1 and the inner ring 2, the elastic retaining flap 4-3 on the limiting ring body 4-1 will engage with the corresponding annular groove 1-2, thereby fixing the limiting ring 4 and preventing it from separating from the outer ring 1. The elastic retaining flap 4-3 and the limiting ring body 4-1 are integrally formed, and the elastic retaining flap 4-3 can be formed on the limiting ring body 4-1 by stamping.

[0031] In this embodiment, the limiting ring 4 is made of spring steel.

[0032] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A high sealability deep groove ball bearing, characterized by, The bearing comprises an outer ring, an inner ring, a seal, and a retaining ring. Balls are positioned between the outer and inner rings. External mounting ring grooves are located on both sides of the outer ring, and internal mounting ring grooves are located on both sides of the inner ring. The seal is positioned between the external and internal mounting ring grooves. The seal includes an outer sealing ring body and an inner sealing ring body, connected by a connecting body. The outer sealing ring body is interference-fitted with the external mounting ring groove. A first sealing lip is located on the inner ring surface of the inner sealing ring body, and a second sealing lip is located on the side of the inner sealing ring body closer to the ball bearing. The retaining ring is connected to the outer ring and limits the seal, applying elastic pressure towards the ball bearing.

2. The high sealability deep groove ball bearing according to claim 1, wherein, The sealing element is equipped with a support frame.

3. The high sealability deep groove ball bearing according to claim 2, wherein, The cross-section of the support frame is "L" shaped, and the support frame is embedded in the outer sealing ring and the connecting body.

4. A high-sealing deep groove ball bearing according to claim 1, characterized in that, The limiting ring includes a limiting ring body, which is located on the side of the seal away from the ball; a plurality of spring-loaded plates are provided on the inner side of the limiting ring body, one end of the spring-loaded plates is connected to the limiting ring body, and the other end of the spring-loaded plates is in contact with the inner sealing ring body; a fixing mechanism is provided between the limiting ring body and the outer ring of the bearing.

5. A high-sealing deep groove ball bearing according to claim 4, characterized in that, The fixing mechanism includes an annular groove on the outer ring of the bearing and an elastic retaining flap on the main body of the limiting ring that cooperates with the annular groove.

6. A high-sealing deep groove ball bearing according to claim 4, characterized in that, The limiting ring is made of spring steel.

7. A high-sealing deep groove ball bearing according to claim 4, characterized in that, The spring pressure plate is arc-shaped.

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