Sealing ring suitable for bearing and bearing

Abstract

The utility model relates to the technical field of bearings, and discloses a sealing ring suitable for a bearing and the bearing. The sealing ring comprises a framework ring and a sealing ring body; the sealing ring body is nested on the framework ring, the sealing ring body comprises an outer circle sealing lip part in sealing fit with an outer ring of the bearing and an inner circle sealing lip part in sealing fit with an inner ring of the bearing, and the inner circle sealing lip part comprises an inner circle outer lip and a plurality of inner circle inner lips distributed at intervals from inside to outside in the radial direction of the sealing ring body; the inner circle outer lip inclines towards the outer side face of the sealing ring body, the inner circle outer lip is used for abutting against the groove shoulder portion of a first sealing groove formed in an inner ring, and the lip top of the inner circle inner lip inclines towards the inner side face of the sealing ring body. The lip tops of the two adjacent inner circle inner lips close to the inner circle outer lip are located in the same radial plane and used for abutting against the groove inner wall of the first sealing groove. The sealing ring is simple in structure, low in manufacturing cost, easy to install and good in sealing performance, and the service life of the bearing can be prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of bearings, and in particular to a sealing ring suitable for a bearing and a bearing. Background Art

[0002] A deep groove ball bearing generally comprises an inner ring, an outer ring and a plurality of steel balls assembled between the inner and outer rings through a retaining frame. Two identical skeleton-type sealing rings made of nitrile rubber are arranged on both axial sides between the inner ring and the outer ring.

[0003] Among them, both the inner ring and the outer ring are provided with sealing grooves for installing the sealing rings. The sealing lip structure design of the existing sealing rings is complex, and the design requirements for the sealing grooves are high, and the installation accuracy requirements for the sealing rings are high. This increases the manufacturing cost, and if the installation is not in place, the sealing ring and the sealing groove are likely to have poor contact, and the sealing effect is difficult to guarantee, which directly affects the service life of the bearing. Utility Model Content

[0004] The purpose of the present application is to provide a sealing ring and a bearing suitable for a bearing, so as to solve the problem in the prior art that the sealing ring for the bearing has high installation precision, resulting in the inability to guarantee the sealing effect and life.

[0005] To achieve the above objectives, in a first aspect, the present application provides a sealing ring suitable for a bearing, comprising

[0006] Skeleton circles; and

[0007] A sealing ring body, wherein the sealing ring body is embedded in the skeleton ring, and the sealing ring body comprises an outer circular sealing lip portion that seals with the outer ring of the bearing and an inner circular sealing lip portion that seals with the inner ring of the bearing, wherein the inner circular sealing lip portion comprises an inner circular outer lip that is sequentially connected as one body and a plurality of inner circular inner lips that are spaced apart from each other along the radial direction of the sealing ring body from inside to outside;

[0008] Among them, the inner circle outer lip is inclined toward the outer side surface of the sealing ring body, the inner circle outer lip is used to abut against the groove shoulder of the first sealing groove set on the inner ring, the lip top of the inner circle inner lip is inclined toward the inner side surface of the sealing ring body, and the lip tops of the two inner circle inner lips that are close to the inner circle outer lip and adjacent to each other are located in the same radial plane and are both used to abut against the inner wall of the first sealing groove.

[0009] As a further improvement of the above technical solution:

[0010] In a possible implementation manner, the plurality of inner circle inner lips include a first inner circle inner lip and a second inner circle inner lip in sequence from the inside to the outside along the radial direction of the sealing ring body, and the lip tops of the first inner circle inner lip and the second inner circle inner lip are both located in the same radial plane and are used to abut against the inner wall surface of the first sealing groove;

[0011] A neck groove recessed toward the inner side surface is provided between the inner circle outer lip and the sealing ring body, and the side of the lip root of the first inner circle inner lip facing away from the second inner circle inner lip is connected to the side of the lip root of the inner circle outer lip facing away from the neck groove, wherein the width of the lip root of the first inner circle inner lip is greater than the sum of the width of the lip root of the inner circle outer lip and the width of the bottom of the neck groove.

[0012] In a possible implementation manner, at least three of the plurality of inner circle inner lips are sequentially provided along the radial direction of the sealing ring body from the inside to the outside, and the at least three inner circle inner lips are distributed at equal intervals and have consistent structures.

[0013] In a possible implementation manner, the plurality of inner circle inner lips distributed at intervals are sawtooth-shaped.

[0014] In a possible implementation manner, the lip top of the inner circular inner lip is in the shape of a flat top, a dome or a pointed top.

[0015] To achieve the above-mentioned purpose, in a second aspect, the present application further provides a bearing, comprising an inner ring, an outer ring, a retaining frame, a steel ball, and a sealing ring suitable for the bearing according to the above-mentioned first aspect;

[0016] A first sealing groove is provided on one side of the inner ring facing the outer ring, and the first sealing groove is in sealing cooperation with the inner circle sealing lip;

[0017] A second sealing groove is provided on one side of the outer ring facing the inner ring, and the outer circular sealing lip is received in the second sealing groove to form an interference fit.

[0018] As a further improvement of the above technical solution:

[0019] In a possible implementation manner, the first sealing groove includes a groove shoulder portion, a groove bottom portion and a groove inner wall portion connected in sequence from the outside to the inside along the axial direction of the inner ring;

[0020] The groove shoulder abuts against the inner circle outer lip, and the wall surface of the groove inner wall abuts against the lip tops of two adjacent inner circle inner lips close to the inner circle outer lip, wherein the wall surface is parallel to the radial plane where the lip tops of the two adjacent inner circle inner lips are located.

[0021] In a possible implementation manner, the diameter of the shoulder ring formed by the groove shoulder gradually increases from the outside to the inside along the axial direction of the inner ring.

[0022] In a possible implementation manner, the shoulder ring formed by the groove shoulder is interference fit with the inner circle outer lip.

[0023] In a possible implementation manner, the interference between the two adjacent inner circle inner lips close to the inner circle outer lip and the wall surface of the inner wall portion of the groove is 0.1 mm to 0.3 mm.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present application provides a sealing ring and a bearing suitable for a bearing, wherein the sealing ring suitable for a bearing is sealed with the outer ring and the inner ring of the bearing through an outer circle sealing lip and an inner circle sealing lip, respectively, and the lip tops of the two inner circle inner lips of the inner circle sealing lip that are close to the inner circle outer lip and adjacent to each other are located in the same radial plane and are both used to abut against the inner wall of the first sealing groove, which is convenient for installation and ensures the sealing effect on the one hand, and convenient for demoulding and manufacturing on the other hand, because the lip tops of the inner circle inner lips are located in the same radial plane. In this way, the sealing ring suitable for a bearing provided by the present application has a simple structure, reduces the manufacturing cost, and is applied to the bearing, is easy to install and has guaranteed sealing performance, thereby extending the service life of the bearing.

[0026] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application. It should be understood that the following drawings only show certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0028] Figure 1 A schematic structural diagram of a sealing ring applicable to a bearing provided in an embodiment of the present application is shown;

[0029] Figure 2 A schematic structural diagram of another sealing ring applicable to a bearing provided in an embodiment of the present application is shown;

[0030] Figure 3 The embodiment of the present application shows a method for installing Figure 2 A partial structural sectional view of a bearing with a sealing ring as shown;

[0031] Figure 4 Shows Figure 3 A local enlarged schematic diagram of the middle A;

[0032] Figure 5 Shows Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0033] Figure 6A partial structural schematic diagram of an inner ring of a bearing provided in an embodiment of the present application is shown;

[0034] Figure 7 A schematic diagram showing the dimensional relationship between the inner ring and the seal in the bearing provided in an embodiment of the present application is shown.

[0035] Description of reference numerals:

[0036] 100, sealing ring; 110, skeleton ring; 120, sealing ring body; 121, outer circle sealing lip; 122, inner circle sealing lip; 1220, inner circle inner lip; 1220a, lip top; 1221, first inner circle inner lip; 1222, second inner circle inner lip; 1223, third inner circle inner lip; 1224, inner circle outer lip; 1225, neck groove;

[0037] 200, inner ring; 210, first sealing groove; 211, groove shoulder; 212, groove bottom; 213, groove inner wall;

[0038] 300, outer ring; 310, second sealing groove;

[0039] 400, cage;

[0040] 500. Steel ball. DETAILED DESCRIPTION

[0041] The specific implementation of the embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present application, and is not used to limit the embodiment of the present application.

[0042] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0043] Embodiment 1

[0044] See also Figure 1 , Figure 2 and Figure 3 This embodiment provides a sealing ring 100 suitable for a bearing, especially suitable for a double-sided contact sealed deep groove ball bearing, and of course can also be suitable for cylindrical roller bearings, etc., hereinafter collectively referred to as bearings.

[0045] The bearing includes an inner ring 200, an outer ring 300, and a plurality of steel balls 500 assembled between the inner and outer rings 300 through a retainer 400. Seal rings 100 are provided on both sides of the axial direction between the inner ring 200 and the outer ring 300. The seal ring 100 is used to prevent harmful substances such as dust, water vapor or foreign matter in the environment from easily entering the bearing structure; at the same time, it prevents the grease inside the bearing structure from being thrown out during the bearing rotation process. A first sealing groove 210 is provided on the outer side of the inner ring 200 (see Figure 5), a second sealing groove 310 is provided on the inner side of the outer ring 300.

[0046] The seal ring 100 for bearings provided in this embodiment comprises a skeleton ring 110 and a seal ring body 120, wherein the seal ring body 120 is nested on the skeleton ring 110, for example, by secondary casting.

[0047] Optionally, the skeleton ring 110 is a metal part, for example, steel, stainless steel, copper, aluminum, etc. The skeleton ring 110 is made of metal material to ensure that the sealing ring 100 has good strength and rigidity.

[0048] Optionally, the sealing ring body 120 is made of rubber material, for example, nitrile rubber (NBR), fluororubber (FKM), silicone rubber (VMQ) and other rubber materials are used to make the sealing ring body 120, so as to ensure that the sealing ring 100 has good sealing and wear resistance.

[0049] In this embodiment, the sealing ring body 120 includes an outer circular sealing lip 121 that seals with the outer ring 300 of the bearing and an inner circular sealing lip 122 that seals with the inner ring 200 of the bearing. The inner circular sealing lip 122 includes an inner circular outer lip 1224 that is connected as a whole in sequence and a plurality of inner circular inner lips 1220 that are spaced apart from each other along the radial direction of the sealing ring body 120 from the inside to the outside.

[0050] Please also read Figure 5 and Figure 6 , wherein the inner circle outer lip 1224 is inclined toward the outer side surface of the sealing ring body 120, and the inner circle outer lip 1224 is used to abut against the groove shoulder 211 of the first sealing groove 210 set on the inner ring 200, and the lip top 1220a of the inner circle inner lip 1220 is inclined toward the inner side surface of the sealing ring body 120, and the lip tops 1220a of the two adjacent inner circle inner lips 1220 close to the inner circle outer lip 1224 are located in the same radial plane and are both used to abut against the groove inner wall portion 213 of the first sealing groove 210.

[0051] In this embodiment, the multiple inner circle inner lips 1220 are equally spaced and have the same structure, which is easy to open and demould, and the qualified rate of finished products is high. In the prior art, the structure of the inner circle inner lips 1220 is usually designed to be different and complex, which is not conducive to molding and demoulding.

[0052] Optionally, the inner circle inner lips 1220 that are spaced apart are serrated. In this way, the gap between two adjacent inner circle inner lips 1220 is not a plane, so that a thinner connecting neck ring is not formed, and the structural strength is better.

[0053] Optionally, the lip top 1220a of the inner circular inner lip 1220 is in the shape of a flat top, a dome or a pointed top.

[0054] Compared with the prior art, the seal ring 100 for bearings provided in this embodiment is sealed with the outer ring 300 and the inner ring 200 of the bearing through the outer circle sealing lip 121 and the inner circle sealing lip 122, respectively, and the lip tops 1220a of the two inner circle inner lips 1220 close to the inner circle outer lip 1224 and adjacent to each other of the inner circle sealing lip 122 are located in the same radial plane and are used to abut against the inner wall 213 of the first sealing groove 210, which is convenient for installation and ensures the sealing effect; on the other hand, the lip tops 1220a of the inner circle inner lips 1220 are located in the same radial plane for easy demoulding. In this way, the seal ring 100 for bearings provided in this embodiment has a simple structure, reduces the manufacturing cost, and is applied to the bearing, is easy to install and has guaranteed sealing performance, thereby extending the service life of the bearing.

[0055] Embodiment 2

[0056] See also Figure 1 This embodiment provides a sealing ring 100 suitable for a bearing, and is particularly suitable for a double-sided contact sealed deep groove ball bearing. This embodiment 2 is an improvement made on the technical basis of the above embodiment 1. Compared with the above embodiment 1, the difference is that:

[0057] In this embodiment, the inner lip 1220 adopts a two-stage lip structure. Specifically, the plurality of inner lips 1220 include a first inner lip 1221 and a second inner lip 1222 in sequence from the inside to the outside along the radial direction of the sealing ring body 120. The lip tops 1220a of the first inner lip 1221 and the second inner lip 1222 are both located in the same radial plane and are used to abut against the inner wall surface of the first sealing groove 210 (see Figure 5 and Figure 6 ).

[0058] A neck groove 1225 recessed toward the inner side surface of the sealing ring body 120 is provided between the inner circular outer lip 1224 and the sealing ring body 120, and one side of the lip root of the first inner circular inner lip 1221 and the second inner circular inner lip (1222) are connected to the side of the lip root of the inner circular outer lip 1224 facing away from the neck groove 1225, wherein the width of the lip root of the first inner circular inner lip 1221 is greater than the sum of the width of the lip root of the inner circular outer lip 1224 and the width of the bottom of the neck groove 1225.

[0059] It should be noted that in the prior art, a narrow neck ring is usually formed between the inner circle outer lip 1224 and the second inner circle inner lip 1222 as well as the first inner circle inner lip 1221. The narrow neck ring is thin and is easy to break during the demolding process. It is also easy to age and crack after long-term use, which makes it difficult to ensure the contact force between the inner circle outer lip 1224 and the inner ring 200, and it is not easy to achieve stable and reliable sealing performance.

[0060] Compared with the prior art, in this embodiment, the width of the lip root of the first inner circle inner lip 1221 is greater than the sum of the width of the lip root of the inner circle outer lip 1224 and the width of the bottom of the neck groove 1225. In this way, the thickness of the neck ring formed at the neck groove 1225 includes the thickness of the first inner circle inner lip 1221, thereby increasing the thickness of the neck ring, making the connection between the first inner circle inner lip 1221 and the second inner circle inner lip 1222 more reliable, enhancing the structural strength, and being conducive to providing continuous, stable, and reliable contact force and sealing performance. It is not easy to crack and break due to aging during long-term use, thereby extending the service life.

[0061] In this embodiment, the first inner lip 1221 and the second inner lip 1222 are equally spaced and have the same structure, which is easy to open and demould, and the qualified rate of finished products is high. In the prior art, the structure of the inner lip 1220 is usually designed to be different and complex, which is not conducive to molding and demoulding.

[0062] Optionally, the first inner circle inner lip 1221 and the second inner circle inner lip 1222 that are spaced apart are serrated. In this way, the gap between two adjacent inner circle inner lips 1220 is not a plane, so that a thin connection neck ring is not formed, and the structural strength is better.

[0063] Optionally, the lip tops 1220a of the first inner round inner lip 1221 and the second inner round inner lip 1222 are in the shape of a flat top, a dome or a pointed top.

[0064] Embodiment 3

[0065] See also Figure 2 and Figure 3 This embodiment provides a sealing ring 100 suitable for a bearing, and is particularly suitable for a double-sided contact sealed deep groove ball bearing. This embodiment 3 is an improvement made on the technical basis of the above embodiment 1. Compared with the above embodiment 1, the difference is that:

[0066] In this embodiment, at least three inner circle inner lips 1220 are sequentially arranged from the inside to the outside along the radial direction of the sealing ring body 120, and at least three inner circle inner lips 1220 are evenly spaced and have the same structure. Therefore, it is easy to open the mold and demould, and the qualified rate of the finished product is high. In the prior art, the structure of the inner circle inner lip 1220 is usually designed to be different and complex, which is not conducive to molding and demoulding.

[0067] Specifically, this embodiment is described in detail by taking the inner circle inner lip 1220 of the three-level lip structure as an example. Of course, in some embodiments, the inner circle inner lip 1220 may also be a four-level lip, a five-level lip, etc.

[0068] The inner circle inner lip 1220 of the three-level lip structure includes three inner circle inner lips 1220. The three inner circle inner lips 1220 are respectively defined as the first inner circle inner lip 1221, the second inner circle inner lip 1222 and the third inner circle inner lip 1223. Among them, along the radial direction of the sealing ring body 120, from inside to outside, they are the first inner circle inner lip 1221, the second inner circle inner lip 1222 and the third inner circle inner lip 1223. That is to say, the first inner circle inner lip 1221 and the second inner circle inner lip 1222 are closer to the inner circle outer lip 1224.

[0069] Please also read Figure 5 and Figure 6 Furthermore, the first inner lip 1221, the second inner lip 1222 and the third inner lip 1223 are all located in the same radial plane. When the sealing ring 100 is installed on the bearing, the lip tops 1220a of the first inner lip 1221 and the second inner lip 1222 are used to abut against the inner wall surface of the first sealing groove 210, and the lip top 1220a of the third inner lip 1223 does not abut against the inner wall surface of the first sealing groove 210 and does not contact the retainer. In this way, the first inner lip 1221 and the second inner lip 1222 are used to form a seal with the inner ring 200 of the bearing, and the groove formed between the third inner lip 1223 and the second inner lip 1222 has an oil guiding function.

[0070] It should be noted that in the prior art, a narrow neck ring is usually formed between the inner circle outer lip 1224 and the second inner circle inner lip 1222 as well as the first inner circle inner lip 1221. The narrow neck ring is thin and is easy to break during the demolding process. It is also easy to age and crack after long-term use, which makes it difficult to ensure the contact force between the inner circle outer lip 1224 and the inner ring 200, and it is not easy to achieve stable and reliable sealing performance.

[0071] In this embodiment, a neck groove 1225 is provided between the inner circle outer lip 1224 and the sealing ring body 120, and the side of the lip root of the first inner circle inner lip 1221 facing away from the neck groove 1225 is connected to the side of the lip root of the inner circle outer lip 1224 facing away from the neck groove 1225. The width of the lip root of the first inner circle inner lip 1221 is greater than the sum of the width of the lip root of the inner circle outer lip 1224 and the width of the bottom of the neck groove 1225.

[0072] Compared with the prior art, the present embodiment designs the lip root width of the first inner circle inner lip 1221 to be greater than the sum of the lip root width of the inner circle outer lip 1224 and the width of the groove bottom of the neck groove 1225. In this way, the thickness of the neck ring formed at the neck groove 1225 includes the thickness of the first inner circle inner lip 1221, thereby increasing the thickness of the neck ring, making the connection between the first inner circle inner lip 1221 and the second inner circle inner lip 1222 more reliable, enhancing the structural strength, and being conducive to providing continuous, stable, and reliable contact force and sealing performance. It is not easy to cause aging cracking and breakage during long-term use, thereby extending the service life.

[0073] Optionally, the first inner lip 1221, the second inner lip 1222 and the third inner lip 1223 are serrated. In this way, the gap between two adjacent inner lips 1220 is not a plane, so that a thin connection neck ring is not formed, and the structural strength is better.

[0074] Optionally, the lip tops 1220a of the first inner circular inner lip 1221, the second inner circular inner lip 1222 and the third inner circular inner lip 1223 are in the shape of a flat top, a dome or a pointed top.

[0075] Compared with the prior art, the sealing ring 100 for the bearing provided in this embodiment has good sealing performance, high reliability, long service life, and low grease leakage rate, which can greatly reduce the equipment operation and maintenance costs. The reasons are as follows:

[0076] 1. The inner circle outer lip 1224 clamps the shoulder of the first sealing groove 210 of the inner ring 200, which plays an effective role in dust and water prevention. The inner circle inner lip 1220 of the three-level lip structure and the first sealing groove 210 of the inner ring 200 form a multi-barrier cavity, which effectively blocks the external water vapor and dust from entering the bearing cavity, and effectively blocks the loss of grease in the bearing cavity.

[0077] 2. The inner lip 1220 of the three-level lip structure plays a structural reinforcement role in the overall strength of the inner sealing lip 122, improves the deformation resistance of the sealing lip, and enhances the reliability of the seal.

[0078] 3. After optimization, the temperature rise, grease leakage and dust prevention performance of the bearing are much higher than the national standard requirements. The specific test report is shown in the following table.

[0079]

[0080] Embodiment 4

[0081] See also Figures 1 to 6 , this embodiment provides a bearing, in particular, provides a double-sided contact sealed deep groove ball bearing, hereinafter referred to as a bearing.

[0082] The bearing includes an inner ring 200, an outer ring 300, and a plurality of steel balls 500 assembled between the inner and outer rings 300 through a retainer 400. Seal rings 100 are provided on both sides of the axial direction between the inner ring 200 and the outer ring 300. The seal ring 100 is used to prevent harmful substances such as dust, water vapor or foreign matter in the environment from easily entering the bearing structure; at the same time, it prevents the grease inside the bearing structure from being thrown out during the bearing rotation process.

[0083] The sealing ring 100 on at least one of the two axial sides between the inner ring 200 and the outer ring 300 is a sealing ring 100 suitable for a bearing provided by any one of the above-mentioned embodiments 1 to 3, hereinafter referred to as the sealing ring 100 .

[0084] The inner ring 200 is provided with a first sealing groove 210 on the side facing the outer ring 300. The first sealing groove 210 is sealed with the inner circle sealing lip 122. The outer ring 300 is provided with a second sealing groove 310 on the side facing the inner ring 200 (see Figure 4 ), the outer circle sealing lip 121 is received in the second sealing groove 310 and forms an interference fit, so that after the sealing ring 100 is installed, the sealing ring 100 does not rotate relative to the outer ring 300 during operation. In this embodiment, referring to the above-mentioned embodiment 2 and embodiment 3, the plurality of inner circle inner lips 1220 include adjacent first inner circle inner lips 1221 and second inner circle inner lips 1222 in sequence from inside to outside along the radial direction of the sealing ring body 120.

[0085] See also Figure 3 , Figure 5 and Figure 6 The first sealing groove 210 includes a groove shoulder 211, a groove bottom 212 and a groove inner wall 213 connected in sequence from the outside to the inside along the axial direction of the inner ring 200. The groove shoulder 211 abuts against the side of the inner circle outer lip 1224 facing away from the frame, and the wall surface of the groove inner wall 213 abuts against the lip tops 1220a of the two inner circle inner lips 1220 adjacent to the inner circle outer lip 1224, wherein the wall surface is parallel to the radial plane where the lip tops 1220a of the two adjacent inner circle inner lips 1220 are located. In this way, the wall surface of the groove inner wall 213 is a planar structure, which is conducive to maintaining the stable and reliable axial positioning of the sealing ring 100, and ensuring that the sealing ring 100 is tightly fitted with the groove inner wall 213 of the first sealing groove 210. It can be understood that the first sealing groove 210 provided in this embodiment has a simple structure and good machinability, thereby reducing the processing cost.

[0086] In this embodiment, the shoulder ring formed by the groove shoulder 211 is interference fit with the inner circle outer lip 1224. It can be understood that the bearing sealing performance is guaranteed by the tight fit (interference fit) between the inner circle outer lip 1224 of the sealing ring 100 and the groove shoulder 211. After the press fit, the inner circle outer lip 1224 will deform and continuously provide a pressing force to ensure that the pressing force always makes the inner circle outer lip 1224 and the groove shoulder 211 close to each other without generating gaps that can enter dust and moisture.

[0087] Please also read Figure 7 Specifically, the diameter d1 of the shoulder ring formed by the groove shoulder 211 is larger than the diameter d2 of the inner circle outer lip 1224 of the sealing ring 100 (d1 may be slightly larger than d2), and the two should be interference fit, and the inner circle outer lip 1224 and the groove shoulder 211 must be in reliable contact and flexible rotation without jamming, and the friction torque is acceptable. Optionally, d1 = d2 + e; wherein e is a constant, and the value range of e is 0.4 to 0.8 mm.

[0088] Furthermore, the diameter of the shoulder ring formed by the groove shoulder 211 gradually increases from the outside to the inside along the axial direction of the inner ring 200. In this way, the groove shoulder 211 of the first sealing groove 210 is inclined outward, and the gravity effect can be used to assist in dust and water prevention. At the same time, the groove shoulder 211 cooperates with the inner circle outer lip 1224 to form a better sealing effect.

[0089] In some embodiments, in order to ensure that the two adjacent inner round inner lips 1220 close to the inner round outer lip 1224 are in reliable contact with the wall surface of the groove inner wall portion 213, the interference between the inner round inner lips 1220 and the wall surface of the groove inner wall portion 213 is 0.1mm to 0.3mm.

[0090] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0091] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0093] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A sealing ring suitable for a bearing, It is characterized in that include a skeleton ring (110); and A sealing ring body (120), wherein the sealing ring body (120) is nested on the skeleton ring (110), and the sealing ring body (120) comprises an outer circular sealing lip (121) that is sealed with the outer ring (300) of the bearing and an inner circular sealing lip (122) that is sealed with the inner ring (200) of the bearing, wherein the inner circular sealing lip (122) comprises, from inside to outside in the radial direction of the sealing ring body (120), an inner circular outer lip (1224) that is sequentially connected as one body and a plurality of inner circular inner lips (1220) that are spaced apart; The inner circular outer lip (1224) is inclined toward the outer side surface of the sealing ring body (120), and the inner circular outer lip (1224) is used to abut against the groove shoulder (211) of the first sealing groove (210) provided on the inner ring (200). The lip top (1220a) of the inner circular inner lip (1220) is inclined toward the inner side surface of the sealing ring body (120), and the lip tops (1220a) of the two adjacent inner circular inner lips (1220) close to the inner circular outer lip (1224) are located in the same radial plane and are both used to abut against the groove inner wall (213) of the first sealing groove (210).

2. The sealing ring suitable for a bearing according to claim 1, It is characterized in that The plurality of inner circular inner lips (1220) include a first inner circular inner lip (1221) and a second inner circular inner lip (1222) in sequence from the inside to the outside along the radial direction of the sealing ring body (120); the lip tops (1220a) of the first inner circular inner lip (1221) and the second inner circular inner lip (1222) are both located in the same radial plane and are used to abut against the inner wall surface of the first sealing groove (210); A neck groove (1225) recessed toward the inner side surface is provided between the inner circular outer lip (1224) and the sealing ring body (120), and the side of the lip root of the first inner circular inner lip (1221) facing away from the second inner circular inner lip (1222) is connected to the side of the lip root of the inner circular outer lip (1224) facing away from the neck groove (1225), wherein the width of the lip root of the first inner circular inner lip (1221) is greater than the sum of the width of the lip root of the inner circular outer lip (1224) and the width of the bottom of the neck groove (1225).

3. The sealing ring suitable for a bearing according to claim 1 or 2, It is characterized in that At least three of the plurality of inner circle inner lips (1220) are arranged in sequence from the inside to the outside along the radial direction of the sealing ring body (120), and the at least three inner circle inner lips (1220) are distributed at equal intervals and have consistent structures.

4. The sealing ring suitable for a bearing according to claim 1, It is characterized in that The plurality of spaced apart inner circular inner lips (1220) are serrated.

5. The sealing ring suitable for a bearing according to claim 1, It is characterized in that The lip top (1220a) of the inner round inner lip (1220) is in the shape of a flat top, a dome or a pointed top.

6. A bearing, It is characterized in that It comprises an inner ring (200), an outer ring (300), a cage, a steel ball (500) and a sealing ring (100) suitable for a bearing according to any one of claims 1 to 5; A first sealing groove (210) is provided on a side of the inner ring (200) facing the outer ring (300), and the first sealing groove (210) is sealingly matched with the inner circle sealing lip (122); A second sealing groove (310) is provided on a side of the outer ring (300) facing the inner ring (200), and the outer circular sealing lip (121) is received in the second sealing groove (310) to form an interference fit.

7. The bearing according to claim 6, It is characterized in that The first sealing groove (210) includes a groove shoulder (211), a groove bottom (212) and a groove inner wall (213) which are connected in sequence from the outside to the inside along the axial direction of the inner ring (200); The groove shoulder portion (211) abuts against the inner circle outer lip (1224), and the wall surface of the groove inner wall portion (213) abuts against the lip tops (1220a) of the two adjacent inner circle inner lips (1220) close to the inner circle outer lip (1224), wherein the wall surface is parallel to the radial plane where the lip tops (1220a) of the two adjacent inner circle inner lips (1220) are located.

8. The bearing according to claim 7, It is characterized in that Along the axial direction of the inner ring (200) from the outside to the inside, the diameter of the shoulder ring formed by the groove shoulder (211) gradually increases.

9. The bearing according to claim 7, It is characterized in that The shoulder ring formed by the groove shoulder (211) and the inner circle outer lip (1224) are in interference fit.

10. The bearing according to any one of claims 7 to 9, It is characterized in that The interference between the two adjacent inner circle inner lips (1220) close to the inner circle outer lip (1224) and the wall surface of the groove inner wall portion (213) is 0.1 mm to 0.3 mm.

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