Multi-sealing bearing with protective cover
By adopting a multi-sealing design of a three-lip protective cover and a three-lip-mounted dust cover on the bearing, the problem of insufficient sealing performance in harsh environments is solved, and a higher service life and sealing effect is achieved.
Patent Information
- Application Number
- CN202421823216.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-30
AI Technical Summary
Traditional bearing sealing structures have poor protection performance in harsh environments, which can easily cause mud or gravel to enter the lubrication system and reduce the service life of the bearing.
The bearing design with multiple seals with protective covers is adopted. The combination of the three-lip protective cover and the three-lip-mounted dust cover is achieved to achieve the triple sealing effect, prevent the invasion of external mud, water, and gravel, and avoid the leakage of lubricating oil.
It effectively improves the service life of the bearing in harsh working environment, prevents external foreign objects from contaminating the grease inside the bearing, avoids lubricating oil leakage, and enhances sealing performance.
Smart Images
Figure CN222772521U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of connecting component structures, and more specifically to a bearing with a protective cover and multiple seals. Background Art
[0002] As a key rotating component in various mechanical equipment, the performance and life of the bearing unit depends largely on the lubrication and sealing effects. Under normal circumstances, the sealing of the bearing unit is usually achieved through simple structures such as single-layer sealing rings and dust covers, which are sufficient to prevent the intrusion of dust and moisture. However, in some relatively harsh working environments, such as agricultural machinery, construction machinery, mining equipment, etc., the bearing unit needs to work in an environment full of mud, water and gravel. Under these conditions, the protection performance of the traditional sealing structure is relatively poor, and the sealing performance is insufficient, which can easily lead to mud, water or gravel entering the lubrication system, causing the lubrication system to be damaged and reducing the service life of the bearing.
[0003] In summary, how to improve the service life of bearings in harsh working environments is an urgent problem to be solved by technical personnel in this field. Utility Model Content
[0004] In view of this, the purpose of the utility model is to provide a bearing with a protective cover and multiple seals. The three-lip protective cover and the three-lip rubber dust cover can prevent the intrusion of external mud, water and gravel, avoid leakage of lubricating oil, and increase the service life of the bearing in harsh working environments.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A bearing with a protective cover and multiple seals, comprising:
[0007] The inner ring of the bearing is a tubular structure;
[0008] A three-lip protective cover is arranged on the outer periphery of the inner ring of the bearing, and the three-lip protective cover is provided with a top sealing lip, a middle sealing lip and a bottom sealing lip for achieving internal sealing of the inner ring of the bearing;
[0009] A three-lip rubber dust cover is arranged between the three-lip protective cover and the bearing inner ring. The three-lip rubber dust cover is provided with a three-layer sealing lip at one end facing the bearing inner ring to prevent grease leakage. The middle sealing lip and the bottom sealing lip are both in contact with the three-lip rubber dust cover.
[0010] Preferably, an inner ring step is provided on the outer periphery of the bearing inner ring, a bearing outer ring is provided on the outer periphery of the inner ring step, the top sealing lip is sealed with interference contact with the bearing outer ring, the middle sealing lip is sealed with interference contact with the inclined surface of the skeleton of the three-lip rubber-hung dust cover, and the bottom sealing lip is sealed with interference contact with the front surface of the skeleton of the three-lip rubber-hung dust cover.
[0011] Preferably, a knurled section is provided on the outer periphery of the bearing inner ring, and the knurled section is arranged on the outer periphery of the bearing inner ring close to the inner ring step, and the bottom of the skeleton of the three-lip protective cover is fixedly connected to the knurled section by riveting.
[0012] Preferably, the three-lip rubber-hung dust cover also includes a top curling portion, the outer periphery of the bearing outer ring is provided with a sealing groove, and the top curling portion is arranged in the sealing groove by riveting.
[0013] Preferably, the three-layer sealing lip is arranged in contact with the surface of the inner ring step, the three-layer sealing lip includes three sealing lips parallel to each other, and the three sealing lips are evenly arranged along the circumference of the inner ring step.
[0014] Preferably, the three-lip protective cover also includes a coated frame and a connecting part, the outer periphery of the coated frame is provided with an anti-corrosion layer, the connecting part is provided on the inner periphery of the coated frame, and the connecting part is used to achieve a fixed connection between the top sealing lip and the middle sealing lip and a fixed connection between the middle sealing lip and the bottom sealing lip.
[0015] Preferably, it further comprises a bearing seat, the bearing seat is provided with a ball hole, a platform is provided at the end of the ball hole, the platform is extended toward the three-lip protective cover and is used to prevent contaminants from entering between the bearing inner ring and the bearing outer ring.
[0016] Preferably, the three-lip protective cover and the three-lip rubber-hung dust cover are both annular components, and two of the three-lip protective cover and the three-lip rubber-hung dust cover are provided.
[0017] The utility model provides a bearing with a protective cover and multiple seals. The outer periphery of the inner ring of the bearing is provided with a three-lip protective cover and a three-lip rubber dust cover. The three-lip protective cover is provided with a top sealing lip, a middle sealing lip and a bottom sealing lip. A three-lip rubber dust cover is provided between the three-lip protective cover and the inner ring of the bearing. The three-lip rubber dust cover is provided with three layers of sealing lips at one end facing the inner ring of the bearing. The three layers of sealing lips can prevent the grease in the inner ring of the bearing from leaking out. The middle sealing lip and the bottom sealing lip on the three-lip protective cover are both in contact with the three-lip rubber dust cover. The top sealing lip, the middle sealing lip and the bottom sealing lip are used in combination with each other to provide triple protection, prevent the intrusion of mud, water and gravel from the outside, prevent foreign matter from contaminating the grease inside the bearing, and prevent the lubricating oil from leaking out. The service life of the bearing in a harsh working environment can be increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0019] Figure 1 A schematic diagram of the partial structure of a bearing with a protective cover and multiple seals provided by the utility model;
[0020] Figure 2 A schematic diagram of the structure of the three-lip protective cover provided by the utility model;
[0021] Figure 3 This is a schematic diagram of the structure of the three-lip glue-hanging dust cover provided by the utility model;
[0022] Figure 4 The present invention is a schematic structural diagram of a bearing with a protective cover and multiple seals provided by the present invention.
[0023] Reference numerals:
[0024] 1-bearing inner ring; 11-knurling section; 2-inner ring step; 3-three-lip protective cover; 31-top sealing lip; 32-middle sealing lip; 33-bottom sealing lip; 34-frame bottom; 35-plated frame; 36-connecting part; 4-three-lip rubber dust cover; 41-three-layer sealing lip; 42-frame slope; 43-frame front; 44-top curling part; 5-bearing outer ring; 51-sealing groove; 6-ball hole; 61-platform; 7-bearing seat. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] The core of the utility model is to provide a bearing with a protective cover and multiple seals, which can prevent the invasion of external mud, water and gravel, avoid the leakage of lubricating oil, and increase the service life in harsh working environments.
[0027] It should be noted that the directions or positional relationships indicated by “upper”, “lower”, “front”, “back”, etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.
[0028] The present application provides a bearing with a protective cover and multiple seals, comprising: a bearing inner ring 1, a three-lip protective cover 3 and a three-lip rubber-covered dust cover 4;
[0029] Wherein, the bearing inner ring 1 is a tubular structure;
[0030] The three-lip protective cover 3 is arranged on the outer periphery of the bearing inner ring 1, and the three-lip protective cover 3 is provided with a top sealing lip 31, a middle sealing lip 32 and a bottom sealing lip 33 for achieving internal sealing of the bearing inner ring 1;
[0031] The three-lip rubber dust cover 4 is arranged between the three-lip protective cover 3 and the bearing inner ring 1. The end of the three-lip rubber dust cover 4 facing the bearing inner ring 1 is provided with a three-layer sealing lip 41 for preventing grease leakage. The middle sealing lip 32 and the bottom sealing lip 33 are both abutted against the three-lip rubber dust cover 4.
[0032] For details, please refer to the attached Figure 1 , Attachment Figure 2 With attached Figure 3 The three-lip protective cover 3 is an annular structure, and its inner diameter is the same as the outer diameter of the bearing inner ring 1, and is sleeved on the outer periphery of the bearing inner ring 1. The three-lip protective cover 3 is provided with three sealing lips, namely the top sealing lip 31, the middle sealing lip 32 and the bottom sealing lip 33. The extension direction of the three sealing lips is toward the bearing inner ring 1. A three-lip rubber dust cover 4 is provided between the bearing inner ring 1 and the three-lip protective cover 3. The three-lip rubber dust cover 4 is fitted in the gap between the bearing inner ring 1 and the bearing outer ring 5, which can prevent the external mud, water and gravel from entering. Intrusion, the end of the three-lip rubber dust cover 4 facing the bearing inner ring 1 is provided with a three-layer sealing lip 41, the three-layer sealing lip 41 abuts against the outer peripheral surface of the bearing inner ring 1, which can prevent the leakage of lubricating grease, the middle sealing lip 32 and the bottom sealing lip 33 of the three-lip protective cover 3 abut against the three-lip rubber dust cover 4, the three sealing lips can triple block foreign matter such as mud, water, gravel, etc., prevent the intrusion of external mud, water and gravel, avoid external foreign matter from contaminating the internal grease of the bearing, and can increase the service life of the bearing in harsh working environments.
[0033] On the basis of the above embodiment, an inner ring step 2 is provided on the outer periphery of the bearing inner ring 1, a bearing outer ring 5 is provided on the outer periphery of the inner ring step 2, a top sealing lip 31 is sealed by interference contact with the bearing outer ring 5, a middle sealing lip 32 is sealed by interference contact with the skeleton inclined surface 42 of the three-lip rubber-hung dust cover 4, and a bottom sealing lip 33 is sealed by interference contact with the skeleton front surface 43 of the three-lip rubber-hung dust cover 4.
[0034] For details, please refer to the attached Figure 1 The outer periphery of the inner ring 1 of the bearing is provided with an annular protrusion, namely the inner ring step 2. A ball is arranged between the inner ring step 2 and the outer ring 5 of the bearing. There is an interference contact seal between the top sealing lip 31 and the outer ring 5 of the bearing. The seal here can effectively prevent the invasion of mud, water and dust from the outside. At the same time, the centrifugal force generated by the rotation of the bearing can make the mud, water, dust and other impurities outside the top sealing lip 31 be thrown out of the bearing, further improving the sealing performance of the bearing. The middle sealing lip 32 and the bottom sealing lip 33 of the three-lip protective cover 3 are respectively in interference contact and sealed with the skeleton inclined surface 42 and the skeleton front surface 43 of the three-lip rubber dust cover 4. At the same time, the interior of the three-lip protective cover 3 is filled with grease. The above structure can effectively prevent the invasion of mud, water and gravel from the outside, and ensure that the internal sealing structure of the bearing is not affected by the outside.
[0035] In addition, the bearing outer ring 5 is not provided with an oil groove or an oil hole for adding lubricating oil to the inside of the bearing, thereby reducing maintenance work such as regular replacement of grease during the use of the bearing and further reducing maintenance costs.
[0036] Based on the above embodiment, a knurled section 11 is provided on the outer periphery of the bearing inner ring 1. The knurled section 11 is arranged on the outer periphery of the bearing inner ring 1 close to the inner ring step 2. The skeleton bottom 34 of the three-lip protective cover 3 is fixedly connected to the knurled section 11 by riveting.
[0037] Specifically, the skeleton bottom 34 of the three-lip protective cover 3 is pressed onto the knurled section 11 at the outer periphery of the bearing inner ring 1 near the inner ring step 2 by riveting. During the riveting process, the end of the three-lip protective cover 3 that contacts the knurled section 11 is squeezed into a knurled shape, so that the bottom of the three-lip protective cover 3 and the knurled section 11 fit more closely, greatly improving the firmness and sealing performance of the three-lip protective cover 3 on the inner ring.
[0038] On the basis of the above embodiment, the three-lip rubber dust cover 4 also includes a top curling portion 44, a sealing groove 51 is provided on the outer periphery of the bearing outer ring 5, and the top curling portion 44 is riveted into the sealing groove 51.
[0039] Specifically, the top curled edge portion 44 of the three-lip rubber dust cover 4 is riveted into the knurled sealing groove 51 of the outer ring. Compared with the ordinary riveting method, this fastening method makes the three-lip rubber dust cover 4 less likely to fall off in harsh working environments.
[0040] On the basis of the above embodiment, the three-layer sealing lip 41 is arranged against the surface of the inner ring step 2 , and the three-layer sealing lip 41 includes three mutually parallel sealing lips, and the three sealing lips are evenly arranged along the circumference of the inner ring step 2 .
[0041] Specifically, the three-layer sealing lip 41 is a claw-shaped structure, and the three-layer sealing lip 41 is preferably made of rubber. The three-layer sealing lip 41 is bonded and connected to the three-lip rubber dust cover 4, and the extension direction of the claw-shaped structure is toward the inner ring 1 of the bearing. During installation, the three-layer sealing lip 41 is bent and abutted against the outer periphery of the inner ring step 2 by riveting, which is equivalent to adding three layers of barriers to prevent grease from overflowing, which can effectively prevent grease from leaking, ensure a good lubrication environment inside the bearing, and avoid wear and damage to the bearing due to grease loss inside the bearing.
[0042] On the basis of the above embodiment, the three-lip protective cover 3 also includes a coated frame 35 and a connecting portion 36. The outer periphery of the coated frame 35 is provided with an anti-corrosion layer, and the connecting portion 36 is provided on the inner periphery of the coated frame 35. The connecting portion 36 is used to achieve a fixed connection between the top sealing lip 31 and the middle sealing lip 32, and a fixed connection between the middle sealing lip 32 and the bottom sealing lip 33.
[0043] Specifically, the plated frame 35 of the three-lip protective cover 3 is riveted against the inner ring step 2. When the bearing is subjected to mechanical impact caused by external sand and gravel, the three-lip protective cover 3 is not easy to interfere with and deform with the internal sealing structure three-lip rubber dust cover 4 due to the obstruction of the inner ring step 2, resulting in sealing failure. The top sealing lip 31, the middle sealing lip 32, and the bottom sealing lip 33 are connected to the connecting part 36, and are preferably an integrated component, all of which are made of rubber or similar materials to facilitate mass production and installation.
[0044] Based on the above embodiment, it also includes a bearing seat 7, a ball hole 6 is provided on the bearing seat 7, a platform 61 is provided at the end of the ball hole 6, the platform 61 extends toward the three-lip protective cover 3 and is used to prevent contaminants from entering between the bearing inner ring 1 and the bearing outer ring 5.
[0045] For details, please refer to the attached Figure 4 The bearing inner ring 1 can be improved from the existing structure, and the width of the ball hole 6 of the bearing inner ring 1 can be optimized so that the width of the ball hole 6 of the bearing inner ring 1 is larger than the width of the three-lip protective cover 3 on the bearing core. At the same time, a platform 61 is processed at the edge of the ball hole 6 of the bearing inner ring 1, which can reduce the gap between the three-lip protective cover 3 and the platform 61, effectively block most of the mud, water, and gravel, and reduce the blocking pressure of the top sealing lip 31.
[0046] On the basis of the above-mentioned embodiments, the three-lip protective cover 3 and the three-lip rubber-covered dust cover 4 are both annular components, and two of the three-lip protective cover 3 and the three-lip rubber-covered dust cover 4 are provided.
[0047] Specifically, two three-lip protective covers 3 are provided, which are evenly arranged along the axial direction of the bearing inner ring 1, and the two three-lip protective covers 3 are respectively arranged on both sides of the bearing inner ring 1, and cooperate with two three-lip rubber dust covers 4 to fully realize the sealing of the inner ring 1 of the bearing, prevent the intrusion of external mud, water and gravel, prevent external foreign matter from contaminating the internal grease of the bearing, and prevent the leakage of lubricating oil, which can increase the service life of the bearing in harsh working environments.
[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0049] The above is a detailed introduction to a bearing with a protective cover and multiple seals provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A bearing with a protective cover and multiple seals, characterized in that: include: The bearing inner ring (1) is a tubular structure; A three-lip protective cover (3) is arranged on the outer periphery of the bearing inner ring (1), and the three-lip protective cover (3) is provided with a top sealing lip (31), a middle sealing lip (32) and a bottom sealing lip (33) for achieving internal sealing of the bearing inner ring (1); A three-lip rubber dust cover (4) is arranged between the three-lip protective cover (3) and the bearing inner ring (1); one end of the three-lip rubber dust cover (4) facing the bearing inner ring (1) is provided with a three-layer sealing lip (41) for preventing grease leakage; the middle sealing lip (32) and the bottom sealing lip (33) are both arranged in contact with the three-lip rubber dust cover (4).
2. The bearing with multiple seals with a protective cover according to claim 1, characterized in that: The outer circumference of the bearing inner ring (1) is provided with an inner ring step (2), the outer circumference of the inner ring step (2) is provided with a bearing outer ring (5), the top sealing lip (31) is in interference contact and sealing with the bearing outer ring (5), the middle sealing lip (32) is in interference contact and sealing with the framework inclined surface (42) of the three-lip rubber-hung dust cover (4), and the bottom sealing lip (33) is in interference contact and sealing with the framework front surface (43) of the three-lip rubber-hung dust cover (4).
3. The bearing with multiple seals with a protective cover according to claim 2, characterized in that: The outer circumference of the bearing inner ring (1) is provided with a knurled section (11), and the knurled section (11) is arranged on the outer circumference of the bearing inner ring (1) close to the inner ring step (2), and the skeleton bottom (34) of the three-lip protective cover (3) is fixedly connected to the knurled section (11) by riveting.
4. The bearing with multiple seals with a protective cover according to claim 3, characterized in that: The three-lip rubber dust cover (4) further comprises a top curling portion (44), a sealing groove (51) is provided on the outer periphery of the bearing outer ring (5), and the top curling portion (44) is riveted into the sealing groove (51).
5. The bearing with multiple seals with a protective cover according to claim 4, characterized in that: The three-layer sealing lip (41) is arranged in contact with the surface of the inner ring step (2), the three-layer sealing lip (41) comprises three mutually parallel sealing lips, and the three sealing lips are evenly arranged along the circumference of the inner ring step (2).
6. The bearing with multiple seals with a protective cover according to claim 5, characterized in that: The three-lip protective cover (3) further comprises a coated frame (35) and a connecting portion (36), wherein an anti-corrosion layer is provided on the outer periphery of the coated frame (35), and the connecting portion (36) is provided on the inner periphery of the coated frame (35), and the connecting portion (36) is used to achieve a fixed connection between the top sealing lip (31) and the middle sealing lip (32), and a fixed connection between the middle sealing lip (32) and the bottom sealing lip (33).
7. The bearing with a protective cover and multiple seals according to any one of claims 2 to 6, characterized in that: The bearing seat (7) is provided with a ball hole (6), and a platform (61) is provided at the end of the ball hole (6). The platform (61) extends toward the three-lip protective cover (3) and is used to prevent contaminants from entering between the bearing inner ring (1) and the bearing outer ring (5).
8. The bearing with a protective cover and multiple seals according to claim 7, characterized in that: The three-lip protective cover (3) and the three-lip rubber-hanging dust cover (4) are both annular components, and two of each of the three-lip protective cover (3) and the three-lip rubber-hanging dust cover (4) are provided.