Bearing and double-lip combined cover sealing structure thereof

Abstract

The utility model relates to the technical field of bearing sealing, in particular to a bearing and a double-lip combined cover sealing structure thereof. The double-lip combined cover sealing structure comprises a first rubber hanging cover and a second rubber hanging cover which are riveted together, the first rubber hanging cover comprises a first framework and a first rubber part with a first sealing lip formed on the radial inner side, and the second rubber hanging cover comprises a second framework and a second rubber part with a second sealing lip formed on the radial inner side. The radial inner side of the second framework is bent in the direction away from the first rubber hanging cover to form a bent protection edge, and the radial outer side of the second framework is matched with the interior of the radial outer side of the first framework in a riveting mode. Double-lip sealing installation of the bearing can be completed only through one-time riveting operation, invasion of external impurities such as dust, soil, straw chippings and muddy water can be effectively resisted, abrasion or lubrication failure of the bearing caused by invasion of the impurities is avoided, and the service life of the bearing is remarkably prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing sealing technical field, concretely relates to a bearing and double-lip combined cover sealing structure thereof. BACKGROUND

[0002] In the agricultural mechanization operation, the agricultural machinery bearing needs to work in the harsh environment of high dust, high humidity and many particle impurities, such as field soil, crop straw debris, irrigation water mist, etc. If the sealing structure of the bearing cannot effectively block the above impurities from entering the bearing, the bearing will have problems such as grease failure, raceway wear and rust, which will further cause abnormal heating, noise increase and even seizure failure of the bearing.

[0003] The single-layer sealing structure commonly used in the field of agricultural machinery bearing directly exposes the sealing rubber to the external environment. When subjected to particle impact under complex agricultural operation conditions, the rubber is prone to deformation, making it difficult to maintain the integrity of the sealing structure. Due to the lack of additional protective structure, external impurities can easily penetrate the deformed sealing layer and enter the bearing, leading to lubrication failure and accelerating bearing wear, making it difficult to provide reliable protection for the bearing under harsh conditions such as high dust and high impact.

[0004] The existing double-layer labyrinth sealing structure is prone to deformation when subjected to external mechanical impact, which further causes interference between the inner and outer sealing structures, leading to sealing failure and bearing seizure. At the same time, the double-layer sealing structure requires the use of two different sealing pieces, and two installation procedures are required to complete the assembly. SUMMARY

[0005] The utility model aims at providing a bearing and double-lip combined cover sealing structure, which can achieve double-layer sealing effect through one-time riveting and pressing installation, effectively resist the invasion of external impurities such as dust, soil, straw debris and muddy water, and avoid bearing wear or lubrication failure due to impurity invasion.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0007] The double-lip combined cover sealing structure comprises a first rubber cover and a second rubber cover riveted together, the first rubber cover comprises a first skeleton and a first rubber part connected to the inner side of the first skeleton away from the second rubber cover, and the radially inner side of the first rubber part is formed with a first sealing lip;

[0008] The second rubber cover comprises a second skeleton and a second rubber part connected to the inner side of the second skeleton close to the first rubber cover, the second rubber part is in interference contact with the first skeleton, and the radially inner side of the second rubber part is formed with a second sealing lip, the radially inner side of the second skeleton is bent away from the first rubber cover to form a bent protection edge, and the radially outer side of the second skeleton is riveted and pressed to the radially outer side inside the first skeleton.

[0009] Preferably, the first glue part and the second glue part are both nitrile rubber.

[0010] Preferably, the first skeleton and the second skeleton are both galvanized steel skeletons.

[0011] Preferably, the first sealing lip extends obliquely towards the second glue cover.

[0012] Preferably, the second sealing lip extends obliquely away from the first glue cover.

[0013] Preferably, the first skeleton is composed of a first main body, a first transition part and a first riveting part, the first transition part extends away from the second glue cover from the radial outside of the first main body, and the first riveting part is connected to one end of the first transition part away from the first main body and is riveted to form an n-shaped structure.

[0014] The second skeleton is composed of a second main body, a second transition part and a second riveting part, the bent protection edge is on the radial inside of the second main body, the second transition part extends towards the first glue cover from the radial outside of the second main body, and the second riveting part extends radially outward from one end of the second transition part away from the second main body and is embedded in the inside of the first riveting part.

[0015] Preferably, the included angle between the first transition part and the first main body is 75°-135°, and the included angle between the second transition part and the second main body is 75°-135°.

[0016] Preferably, the first transition part and the second transition part are mutually attached.

[0017] The utility model also provides a bearing, including bearing inner race, bearing outer race and setting between bearing inner race and bearing outer race's double -lipped combination cover seal structure and rolling body, first glue cover is close to rolling body and second glue cover is far from rolling body, the inner circumferential surface of bearing outer race is equipped with the clamping groove, the radial outside of first skeleton is riveted in the clamping groove, first sealing lip and second sealing lip are in excess contact with the outer circumferential surface of bearing inner race.

[0018] Preferably, the clamping groove is a U-shaped groove, the side edge of the clamping groove close to the rolling body is a right angle edge, and the side edge of the clamping groove away from the rolling body is an oblique edge.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] ①, strengthen the sealing protection, prolong the service life of bearing: the double sealing design is adopted, the first sealing lip is tightly attached to the outer diameter of the bearing inner ring, and the second sealing lip is bent by the second skeleton to form a bending protection edge, which can effectively resist the invasion of dust, soil, straw debris and mud and other impurities, prevent the deformation of the second sealing lip rubber, and then ensure the sealing effect, stabilize the double-lip combined cover sealing structure, avoid the wear or lubrication failure of the bearing due to the invasion of impurities, and significantly prolong the service life of the bearing.

[0021] ②, simplify the installation process and reduce the comprehensive cost: compared with the traditional double-lip sealing structure, the double-lip combined cover sealing structure of the utility model only needs one riveting operation to complete the double-lip sealing installation of the bearing; the simplified installation mode effectively reduces the installation steps and labor time, significantly reduces the installation cost, and realizes the double improvement of installation efficiency and economy.

[0022] ③, optimize lubrication protection, avoid dry running risk: by expanding the grease storage space, the bearing can accommodate more lubricating grease; at the same time, the double-lip sealing design can prevent oil leakage and isolate external impurities pollution, ensure the stable performance of lubricating grease, and make the bearing always maintain good lubrication state, effectively avoid dry running risk. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a bearing structure schematic diagram of the utility model.

[0024] Figure 2 It is a bearing structure schematic diagram of the utility model. Figure 1

[0025] Figure 3 It is a double-lip combined cover sealing structure riveting before the cooperation schematic diagram of the utility model.

[0026] Figure 4 It is a first glue cover structure schematic diagram before riveting of the utility model.

[0027] Figure 5 It is a second glue cover structure schematic diagram before riveting of the utility model.

[0028] ​Marked in the figure: 101, bearing inner ring; 102, bearing outer ring; 103, rolling body; 104, clamping groove; 10, first glue cover; 11, first skeleton; 12, first glue part; 111, first main body; 112, first transition part; 113, first riveting part; 1131, back plane ring; 1132, axial connecting ring; 1133, front inclined plane ring; 120, first sealing lip; 20, second glue cover; 21, second skeleton; 22, second glue part; 211, second main body; 212, second transition part; 213, second riveting part; 2110, bending protection edge; 220, second sealing lip. DETAILED DESCRIPTION

[0029] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following specific examples are described in detail below, and the drawings are as follows.

[0030] As Figures 1-5 shown, the embodiment provides the utility model also provides a bearing, including bearing inner ring 101, bearing outer ring 102 and rolling body 103, rolling body 103 is rolled and is arranged between bearing inner ring 101 and bearing outer ring 102 and is kept by retainer, bearing inner ring 101, bearing outer ring 102 and rolling body 103 and retainer are all conventional technical configurations, and here is not repeated.The main improvement point of the embodiment is that two groups of sealing structures are located at the front and rear sides of the bearing, and the two groups of sealing structures seal the rolling body 103 and the lubricating grease inside.

[0031] In the embodiment, each sealing structure is a double-lip combined cover sealing structure, which is arranged between the bearing inner ring 101 and the bearing outer ring 102, and includes a first glue cover 10 and a second glue cover 20 riveted together, the first glue cover 10 is close to the rolling body 103, and the second glue cover 20 is away from the rolling body 103.The inner circumferential surface of the bearing outer ring 102 is provided with a clamping groove 104, the clamping groove 104 is a U-shaped groove, the side of the clamping groove 104 close to the rolling body 103 is a right angle side, the side of the clamping groove 104 away from the rolling body 103 is an inclined side, and the radial outer side of the first glue cover 10 and the radial outer side of the second glue cover 20 are riveted in the clamping groove 104.

[0032] Specifically, the first glue cover 10 of the embodiment comprises a first skeleton 11 and a first glue part 12 connected to the inner side of the first skeleton 11 away from the second glue cover 20, the second glue cover 20 comprises a second skeleton 21 and a second glue part 22 connected to the inner side of the second skeleton 21 close to the first glue cover 10, the radial inner side of the first glue part 12 is formed with a first sealing lip 120 extending obliquely towards the second glue cover 20, the second glue part 22 is in interference contact with the first skeleton 11 and the radial inner side of the second glue part 22 is formed with a second sealing lip 220 extending obliquely away from the first glue cover 10, the first sealing lip 120 and the second sealing lip 220 are in interference contact with the outer circumferential surface of the bearing inner ring 101 to prevent the leakage of lubricating grease. The first glue part 12 and the second glue part 22 are both nitrile rubber, and the connection mode of the first glue part 12 and the first skeleton 11 and the connection mode of the second glue part 22 and the second skeleton 21 preferably adopt vulcanization bonding mode to prevent the bearing from shifting and running out of glue in complex agricultural environment, resulting in sealing failure.

[0033] The first skeleton 11 and the second skeleton 21 are both galvanized steel skeletons. The first skeleton 11 is composed of a first main body 111, a first transition part 112 and a first riveting part 113, the first transition part 112 extends radially outward from the first main body 111 away from the second glue cover 20, and the first riveting part 113 is connected to one end of the first transition part 112 away from the first main body 111. As shown in the figure, the second skeleton 21 is composed of a second main body 211, a second transition part 212 and a second riveting part 213, the second transition part 212 extends radially outward from the second main body 211 towards the first glue cover 10, and the second riveting part 213 extends radially outward from one end of the second transition part 212 away from the second main body 211. Figure 5

[0034] The second riveting part 213 of the embodiment is a plane ring structure extending radially outward, and the first riveting part 113 before riveting is a special-shaped ring structure composed of a back plane ring 1131, an axial connecting ring 1132 and a front inclined plane ring 1133 connected in turn, wherein the back plane ring 1131 extends radially outward from one end of the first transition part 112 away from the first main body 111, the axial connecting ring 1132 is connected to the radial outer side of the back plane ring 1131 and extends along the axial direction of the bearing, and the front inclined plane ring 1133 is connected to the axial connecting ring 1132 and extends obliquely away from the rolling body 103 and close to the bearing inner ring 101, as shown in the figure. Figure 4 ​The first rubber hanging cover 10 and the second rubber hanging cover 20 are assembled on the bearing, and only one riveting operation can realize the double-lip sealing installation and the second riveting part 213 is riveted in the inside of the first riveting part 113, at this time, the first riveting part 113 is riveted in the n-shaped structure and the second riveting part 213 is riveted in the inside of the first riveting part 113, the first riveting part 113 is wrapped between the back plane ring 1131 and the front plane inclined ring 1133 which is riveted in the plane, so that the first rubber hanging cover 10 and the second rubber hanging cover 20 become a combined whole, provide a double-layer steel framework for the bearing, and are more beneficial to resist the mechanical impact from the pollutants such as soil and straw debris in the complex agricultural environment, greatly improve the sealing strength of the bearing.

[0035] The included angle between the first transition part 112 and the first main body 111 is 75°-135°, the included angle between the second transition part 212 and the second main body 211 is 75°-135°, preferably, the first transition part 112 and the second transition part 212 are mutually attached, and the included angle between the first transition part 112 and the first main body 111 and the included angle between the second transition part 212 and the second main body 211 are both 90°.

[0036] The first main body 111 of the embodiment extends away from the rolling body 103 relative to the first riveting part 113 riveted in the clamping groove 104 of the bearing outer ring 102, and the second main body 211 extends away from the rolling body 103 relative to the second riveting part 213 riveted in the clamping groove 104 of the bearing outer ring 102, so that when installed on the bearing, the capacity of the bearing grease storage cavity can be greatly expanded, and more lubricating grease can be stored, providing sufficient grease reserve for continuous lubrication of the bearing.

[0037] The radial inner side of the second main body 211 is bent to form a bent protection edge 2110 away from the first rubber hanging cover 10, and the bent protection edge 2110 can effectively protect the second rubber part 22 and prevent the impact of external particulate matter from damaging the sealing layer formed by elastic deformation of the second rubber part 22, and effectively guarantee the sealing effect of the second sealing lip 220.

[0038] The basic principles, main features and advantages of the present application are shown and described above, and those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A dual lip combination cap seal structure characterized by: The first and second rubber hanging covers are riveted to each other, the first rubber hanging cover comprises a first skeleton and a first rubber part connected to the inner side of the first skeleton away from the second rubber hanging cover, and a first sealing lip is formed on the inner side of the first rubber part; The second rubber hanging cover comprises a second skeleton and a second rubber part connected to the inner side of the second skeleton close to the first rubber hanging cover, the second rubber part is in interference contact with the first skeleton, a second sealing lip is formed on the inner side of the second rubber part, the inner side of the second skeleton is bent to form a bent protection edge away from the first rubber hanging cover, and the outer side of the second skeleton is riveted to the inner side of the outer side of the first skeleton.

2. The dual lip combination lid seal structure of claim 1, wherein: The first and second rubber parts are both nitrile rubber.

3. The dual lip combination lid seal structure of claim 1, wherein: The first and second skeletons are both galvanized steel skeletons.

4. The dual lip combination lid seal structure of claim 1, wherein: The first sealing lip extends obliquely towards the second rubber hanging cover.

5. The dual lip combination lid seal structure of claim 1, wherein: The second sealing lip extends obliquely away from the first rubber hanging cover.

6. The double-lip combined cover sealing structure according to any one of claims 1 to 5, wherein: The first skeleton comprises a first main body, a first transition part and a first riveting part, the first transition part extends away from the second rubber hanging cover from the outer side of the first main body, and the first riveting part is connected to one end of the first transition part away from the first main body and is riveted to form an n-shaped structure; The second skeleton comprises a second main body, a second transition part and a second riveting part, the bent protection edge is on the inner side of the second main body, the second transition part extends towards the first rubber hanging cover from the outer side of the second main body, and the second riveting part extends radially outward from one end of the second transition part away from the second main body and is embedded in the inner part of the first riveting part.

7. The dual lip combination lid seal structure of claim 6, wherein: The included angle between the first transition part and the first main body is 75°-135°, and the included angle between the second transition part and the second main body is 75°-135°.

8. The dual lip combination lid seal structure of claim 6, wherein: The first transition part and the second transition part are in close contact with each other.

9. Bearing, characterized in that: The double-lip combined cover sealing structure according to any one of claims 1 to 8, a bearing inner ring, a bearing outer ring and rolling elements arranged between the bearing inner ring and the bearing outer ring, the first rubber hanging cover is close to the rolling elements and the second rubber hanging cover is away from the rolling elements, a clamping groove is arranged on the inner circumferential surface of the bearing outer ring, the outer side of the first skeleton is riveted in the clamping groove, and the first sealing lip and the second sealing lip are in interference contact with the outer circumferential surface of the bearing inner ring.

10. The bearing of claim 9, wherein: The clamping groove is a U-shaped groove, the side of the clamping groove close to the rolling elements is a right-angle side, and the side of the clamping groove away from the rolling elements is an oblique side.

Images