Sealing assembly and bearing

Abstract

Disclosed is a sealing assembly, which is used for sealing between a first component (200) and a second component (300) that are rotatable relative to one another. The sealing assembly (100) comprises a framework (10) and a sealing body (20), the sealing body (20) being attached to an outer wall of the framework (10). The sealing body (20) is provided with sealing lips (21), the sealing lips (21) dynamically abutting against the second component (300). The sealing lips (21) comprise a main lip (211) and dust lips (212), the main lip (211) and the dust lips (212) being spaced apart in the axial direction, and a first annular cavity (213) being formed between the main lip (211), the dust lips, and the second component (300). The dust lips (212) comprise at least a first dust lip (2121) and a second dust lip (2122), the second dust lip (2122) being used for dynamically abutting against the second component (300), and the second dust lip (2122) being provided with a ventilation hole (2123) penetrating through the second dust lip (2122). The ventilation hole (2123) is in communication with the first annular cavity (213), and the first dust lip (2121) is located on the side of the second dust lip (2122) away from the first annular cavity (213) and is used for covering the ventilation hole (2123) in the axial direction and the radial direction. The problem of the first annular cavity becoming vacuumized is solved by means of the ventilation hole, and by using the first dust lip to cover the ventilation hole, the problems of accelerated wearing of the sealing lip, and thus leakage and failure, caused by contaminant particles directly entering the first annular cavity through the ventilation hole are solved. Also disclosed is a bearing using the described sealing assembly.

Description

Sealing components and bearings Technical Field

[0001] The present invention relates to the technical field of sealing of industrial and automotive systems, and in particular to a sealing component and a bearing suitable for working in an environment with contaminated particles. Background Art

[0002] The sealing assembly usually includes a frame and rubber attached to the outside of the frame. The rubber is provided with a sealing lip at the dynamic contact point with the shaft or hole. The sealing lip includes a dust lip and a main lip along the axial direction. The dust lip and the main lip are axially spaced to form a closed space. The dust lip can effectively prevent pollution particles from entering the closed space and entering other rooms, thereby playing a sealing role.

[0003] However, as the seal rotates or the operating temperature changes, air expands and is pushed out of the enclosed space when the temperature rises, while air cannot enter the enclosed space when the temperature drops. As a result, a vacuum is created in the enclosed space between the dust lip and the main lip, pushing the dust lip and the main lip tightly against the shaft. This accelerates the wear of the sealing lip, causing the seal to leak and fail.

[0004] Summary of the Invention

[0005] In order to overcome the problems existing in the related art, the present invention provides a sealing assembly and a bearing.

[0006] According to a first aspect of an embodiment of the present invention, the present invention provides a sealing assembly for sealing between a first component and a second component that can rotate relative to each other, the sealing assembly comprising: a skeleton; and a sealing body, the sealing body being attached to the outer wall of the skeleton, the sealing body being provided with a sealing lip, the sealing lip being in dynamic contact with the second component, the sealing lip comprising a main lip and a dust lip, the main lip and the dust lip being axially spaced and forming a first annular cavity between the main lip and the dust lip and the second component, wherein the dust lip comprises at least a first dust lip and a second dust lip, the second dust lip being used to dynamically contact with the second component, and the second dust lip being provided with a ventilation hole passing through the second dust lip, the ventilation hole being connected to the first annular cavity, the first dust lip being located on the side of the second dust lip away from the first annular cavity, for covering the ventilation hole in the axial and radial directions.

[0007] In some embodiments, the first dust lip and the second dust lip extend from one axial side to the other axial side and extend obliquely from the radial outer side to the radial inner side, wherein a radial inner wall of the first dust lip is provided with a spiral groove.

[0008] In some embodiments, when the second dust lip is not in dynamic contact with the second component, the first dust lip and the second dust lip are spaced apart to form a second annular cavity, the second annular cavity is connected to the outside, and the ventilation hole connects the first annular cavity and the second annular cavity.

[0009] In some embodiments, when the second dust lip is in dynamic contact with the second component, the radially inner free end of the second dust lip is radially deformed and at least partially fits with the radially inner free end of the first dust lip.

[0010] In some embodiments, the radially inner free end of the first dust lip and the radially inner free end of the second dust lip jointly form an annular opening of the second annular cavity, and the ventilation hole is located radially outside the second dust lip away from the annular opening.

[0011] In some embodiments, an extending direction of the ventilation hole is perpendicular to a radial outer wall of the second dust lip.

[0012] In some embodiments, a plurality of ventilation holes are provided at equal intervals along the circumference of the second dust lip.

[0013] In some embodiments, the first dust lip is a continuous and uninterrupted annular structure in the circumferential direction.

[0014] In some embodiments, a plurality of the first dust lips are circumferentially arranged and match the positions and numbers of the ventilation holes.

[0015] In some embodiments, the first dust lip and the second dust lip are integrally demoulded.

[0016] In some embodiments, the first dust lip and the second dust lip are provided separately and are fixed to a side of the second dust lip away from the first annular cavity by gluing.

[0017] In some embodiments, the main lip is located on one axial side of the frame; and the dust lip is located on the other axial side of the frame.

[0018] According to a second aspect of an embodiment of the present invention, the present invention provides a bearing comprising the sealing assembly as described in the first aspect.

[0019] The technical solution provided by embodiments of the present invention can achieve the following beneficial effects: the dust lip comprises a first dust lip and a second dust lip, the second dust lip having a ventilation hole communicating with the first annular cavity, and the first dust lip axially and radially covering the ventilation hole. The ventilation hole allows gas exchange between the first annular cavity and the outside, thereby eliminating the vacuum problem in the first annular cavity between the dust lip and the main lip. The first dust lip axially and radially covers the ventilation hole. When used in an environment with contaminants, the first dust lip prevents external contaminants from easily entering the first annular cavity through the ventilation hole, thereby eliminating the problem of contaminants accelerating wear of the sealing lip and causing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] FIG1 is a cross-sectional view of a sealing assembly according to an exemplary embodiment;

[0022] FIG2 is a partial enlarged view of the dust lip in FIG1 , showing a schematic diagram of the state in which the first dust lip and the second dust lip are spaced apart when the sealing assembly is not installed between the first component and the second component;

[0023] 3 is a partial enlarged view of the dust lip in FIG. 1 , illustrating a state in which the first dust lip and the second dust lip are at least partially in contact with each other when the sealing assembly is installed between the first component and the second component. DETAILED DESCRIPTION

[0024] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0025] In the present invention, unless otherwise specified, the axial direction A, radial direction R and circumferential direction refer to the axial direction A, radial direction R and circumferential direction of the sealing assembly 100 respectively; one axial side or one axial end refers to the right end in Figures 1, 2 and 3, and the other axial end or the other axial side refers to the left end in Figures 1, 2 and 3; the radial outer side refers to the upper side in Figure 1, and the radial inner side refers to the lower side in Figure 3.

[0026] In the related art, a sealing assembly 100 is proposed that can solve the vacuum problem between the dust lip 212 and the main lip 211, that is, a ventilation hole 2123 is provided at the dust lip 212. However, when the sealing assembly 100 is used in an environment with polluting particles, the polluting particles can easily invade the enclosed space of the sealing lip through the ventilation hole 2123, which will also accelerate the wear of the sealing lip and cause leakage failure.

[0027] In order to solve the vacuum problem of the sealing assembly 100 in an environment of contaminated particles, and at the same time solve the technical problem of contaminated particles invading the closed space of the sealing lip through the ventilation holes 2123, the present invention proposes a sealing assembly 100, as shown in Figure 1. The sealing assembly 100 of the present invention is annular in shape as a whole, and is used for sealing between a first component 200 and a second component 300 that can rotate relative to each other, wherein the first component 200 and the second component 300 that can rotate relative to each other can be the outer ring and inner ring of a bearing, or two relatively rotating holes and shafts, which are not specifically limited here.

[0028] In this embodiment, the first component 200 is described as a hole and the second component 300 is described as an axis. The second component 300, which serves as the axis, is located inside the first component 200, which serves as the hole. The second component 300 is relatively stationary, and the first component 200 can rotate relative to the second component 300. Alternatively, the first component 200 is relatively stationary, and the second component 300 rotates relative to the first component 200. This is not specifically limited here.

[0029] As shown in FIG1 , the sealing assembly 100 includes a frame 10 and a sealing body 20, wherein the sealing body 20 is attached to the outer wall of the frame 10. The frame 10 is typically made of a metal material and serves to support and secure the sealing body 20 and to enhance the overall sealing of the sealing assembly 100. The sealing body 20 is typically made of a rubber material that is wear-resistant, waterproof, and elastically deformable. The sealing body 20 is attached and secured to the outer wall of the frame 10 through a vulcanization process. When the sealing assembly 100 abuts against the first component 200 and the second component 300, the sealing function of the sealing assembly 100 is achieved through the interference fit between the sealing body 20 and the first component 200 and the second component 300.

[0030] In this embodiment, the seal assembly 100 can be used in a bearing. Thus, the relatively rotating first component 200 and second component 300 can be the outer and inner rings of the bearing, respectively. The seal assembly 100 can be positioned at both axial ends of the bearing, creating a relatively sealed, enclosed space between the inner and outer rings. This seal assembly prevents external contaminants from entering the enclosed space and contaminating the medium within, or prevents the medium from leaking from the enclosed space to the exterior of the bearing.

[0031] In this embodiment, the skeleton 10 can be in an inverted L-shape, including a transverse portion 11 and a radial portion 12. The radial outer side of the transverse portion 11 is wrapped with a sealing body 20, and is interference fit with the inner wall of the first component 200 (for example, the outer ring) to achieve a torsional connection between the sealing assembly 100 and the first component 200. The radial portion 12 is connected to the other axial end of the transverse portion 11. The sealing body 20 is provided with a sealing lip 21. The sealing lip 21 is located on the radial inner side of the radial portion 12 and extends out of the radial portion 12 of the skeleton 10. The sealing lip 21 of the sealing body 20 is used to dynamically abut with the second component 300.

[0032] It should be noted that the shape of the skeleton 10 shown in this embodiment and its drawings is only exemplary and is not intended to limit the scope of protection of the present disclosure. In some other embodiments, the skeleton 10 can be designed into any shape according to design requirements and is not limited here.

[0033] Furthermore, the sealing lip 21 includes a main lip 211 and a dust lip 212. The main lip 211 and the dust lip 212 are axially spaced apart, and the main lip 211 can be located on one axial side of the skeleton 10 (i.e., the radial portion 12), and the dust lip 212 can be located on the other axial side of the skeleton 10 (i.e., the radial portion 12). A first annular cavity 213 is formed between the main lip 211 and the dust lip 212 and the second component 300. The main lip 211 is used to prevent the medium sealed in the bearing from leaking into the first annular cavity 213 and then leaking to the outside world, while the dust lip 212 is used to prevent external contaminants from entering the first annular cavity 213 and then entering the sealed medium.

[0034] In some other embodiments, depending on the structure of the frame 10 , the main lip 211 and the dust lip 212 may be located on one axial side of the frame 10 or on the other axial side of the frame 10 .

[0035] Furthermore, the dust lip 212 may include at least a first dust lip 2121 and a second dust lip 2122, the second dust lip 2122 being used to dynamically abut against the second component 300, and the second dust lip 2122 being provided with a ventilation hole 2123 passing through the second dust lip 2122, the ventilation hole 2123 being connected to the first annular cavity 213, and the ventilation hole 2123 being connected to the outside, the ventilation hole 2123 connecting the first annular cavity 213 with the outside, the first dust lip 2121 being located radially outside the second dust lip 2122, the first dust lip 2121 not abutting against the second component 300, and the first dust lip 2121 being used to cover the ventilation hole 2123 in the axial and radial directions.

[0036] The first dust lip 2121 covering the ventilation hole 2123 means that the first dust lip 2121 can cover the opening of the ventilation hole 2123 in a contact or non-contact manner, thereby increasing the difficulty for external pollution particles to enter the ventilation hole 2123.

[0037] As can be seen, the first annular cavity 213 can exchange air with the outside world through the ventilation holes 2123, thus eliminating the vacuum problem in the first annular cavity 213 between the dust lip 212 and the main lip 211. The first dust lip 2121 covers the ventilation holes 2123 in the axial direction A and / or radial direction R. When used in an environment with pollutants, this prevents external pollutants from easily entering the first annular cavity 213 directly through the ventilation holes 2123, thus eliminating the problem of pollutants accelerating wear of the sealing lip 21 and causing leakage.

[0038] The first dust lip 2121 and the second dust lip 2122 extend from one axial side to the other axial side and extend obliquely from the radial outer side to the radial inner side. As shown in FIG1 , in this embodiment, the first dust lip 2121 and the second dust lip 2122 extend obliquely and almost parallel to the second component 300 .

[0039] In some embodiments, when the sealing assembly 100 is not installed between the axial hole (i.e., between the first component 200 and the second component 300), the first dust lip 2121 and the second dust lip 2122 may partially fit together. After the sealing assembly 100 is installed between the axial hole, the fit between the first dust lip 2121 and the second dust lip 2122 becomes tighter, thereby preventing external contaminants from entering the first annular cavity 213.

[0040] In this embodiment, the first dust lip 2121 can be set separately from the second dust lip 2122, that is, the first dust lip 2121 and the second dust lip 2122 are not demolded as a whole. After processing, the first dust lip 2121 can be fixed to the side of the second dust lip 2122 away from the inner ring by means of adhesion, fasteners, etc., to cover the ventilation hole 2123 in the axial direction A or radial direction R.

[0041] In the present embodiment, as shown in FIG2 , when the sealing assembly 100 is not installed between the inner ring and the outer ring of the bearing, a radial gap exists between the first dust lip 2121 and the second dust lip 2122. The first dust lip 2121 and the second dust lip 2122 are separated from each other under the elastic action of the rubber, so that the first dust lip 2121 and the second dust lip 2122 are spaced apart to form a second annular cavity 2125. The second annular cavity 2125 can be connected to the outside. The ventilation hole 2123 connects the first annular cavity 213 and the second annular cavity 2125. The second annular cavity 2125 extends the path between the outside and the first annular cavity 213, and can also prevent external pollution particles from directly entering the ventilation hole 2123 or the first annular cavity 213, thereby playing a buffering role.

[0042] In this embodiment, the first dust lip 2121 can be provided separately from the second dust lip 2122, or can be integrally formed with the second dust lip 2122, without specific limitation herein. Furthermore, the first dust lip 2121 is a circumferentially continuous, complete annular structure. Alternatively, multiple independent first dust lips 2121 can be provided circumferentially, with the number and position of the first dust lips 2121 being the same as the number and position of the ventilation holes 2123, so as to cover the ventilation holes 2123 in both the axial and radial directions.

[0043] As shown in FIG3 , after the sealing assembly 100 is installed between the axial holes, that is, when the second dust lip 2122 is in dynamic contact with the second component 300, the radially inner free end of the second dust lip 2122 is squeezed and radially deformed, so that the radially inner free end of the second dust lip 2122 is in at least partial contact with the first dust lip 2121 to fit together.

[0044] It can be seen from this that the second annular cavity 2125 formed by the first dust lip 2121 and the second dust lip 2122 can be separated from each other by the spacing between the first dust lip 2121 and the second dust lip 2122 and the elastic action of the rubber when the sealing assembly 100 is not installed between the first component 200 and the second component 300, thereby avoiding rubber adhesion caused by long-term contact between the first dust lip 2121 and the second dust lip 2122, which prevents external gas from entering the first annular cavity 213 and causes a vacuum problem in the first annular cavity 213.

[0045] The spacing distance between the first dust lip 2121 and the second dust lip 2122 is such that, after the sealing assembly 100 is installed between the first component 200 and the second component 300, the second dust lip 2122 is squeezed and deformed radially so as to at least partially abut or fit with the first dust lip 2121, thereby reducing the size of the annular opening of the second annular cavity 2125. The reduction of the annular opening of the second annular cavity 2125 does not affect the free flow of external gas into and out of the first annular cavity 213, so that the sealing lip 21 can not only avoid vacuum problems in the first annular cavity 213, but also greatly avoid the possibility of external contamination particles entering the first annular cavity 213.

[0046] Therefore, the changes of the first dust lip 2121 and the second dust lip 2122 before and after being installed into the first component 200 and the second component 300 can not only prevent the first dust lip 2121 and the second dust lip 2122 from sticking together when the sealing assembly 100 is not installed, thereby extending the service life, but also when the sealing assembly 100 is installed, it can prevent the contamination particles from entering the first annular cavity 213 in an environment with contamination particles, and there is no vacuum problem, which can greatly improve the performance of the sealing assembly 100 in resisting contamination particles and greatly improve the service life of the sealing assembly 100. Furthermore, whether the first dust lip 2121 and the second dust lip 2122 are partially fitted together when not installed in the axial hole, or partially fitted together after being installed in the axial hole, in the above two embodiments, the inner wall of the first dust lip 2121 is provided with a spiral groove 2124. When the first dust lip 2121 and the second dust lip 2122 are partially fitted together, the spiral groove 2124 can prevent the first dust lip 2121 and the second dust lip 2122 from completely fitting together. The spiral groove 2124 and the ventilation hole 2123 form a labyrinth seal. The spiral groove 2124 connects the ventilation hole 2123 with the outside. Therefore, external gas can freely enter and exit the first annular cavity 213 through the spiral groove 2124 and the ventilation hole 2123, thereby avoiding the vacuum problem of the first annular cavity 213 between the dust lip 212 and the main lip 211.

[0047] In addition, the labyrinth seal formed by the spiral groove 2124 and the ventilation hole 2123 extends the path for the pollution particles to enter the first annular cavity 213, which can effectively prevent the pollution particles from entering the first annular cavity 213. In addition, the spiral groove 2124 can also collect and store tiny invading pollution particles, and these collected and stored pollution particles are pushed out of the spiral groove 2124 with the help of centrifugal force and pumping effect when the sealing assembly 100 rotates.

[0048] In some embodiments, as shown in Figures 1 to 3, the radially inner free end of the first dust lip 2121 and the radially inner free end of the second dust lip 2122 jointly form an annular opening of the second annular cavity 2125, wherein the ventilation hole 2123 is located radially outside the second dust lip 2122 away from the annular opening.

[0049] The annular opening of the second annular cavity 2125 is located at the free end radially inward of the first dust lip 2121 and the second dust lip 2122, while the ventilation holes 2123 are located radially outward, extending the passage from the radial inside to the radial outside. This passage does not affect the free flow of gas in and out of the first annular cavity 213, but it does extend the path for pollutants to travel, preventing them from easily entering the first annular cavity 213. Furthermore, when the second component 300 is relatively stationary and the first component 200 rotates relative to the second component 300, the direction in which pollutants enter the second annular cavity 2125 is opposite to the direction of centrifugal force, thereby preventing the entry of pollutants.

[0050] In some embodiments, the vent holes 2123 extend perpendicularly to the radially outer wall of the second dust lip 2122. The openings of the vent holes 2123 are perpendicular to the outer wall of the second dust lip 2122. This minimizes the opening area of ​​the vent holes 2123 at the second dust lip 2122, thereby reducing the probability of external contaminants entering the first annular cavity 213.

[0051] In this embodiment, multiple ventilation holes 2123 are arranged at equal intervals along the circumference of the second dust lip 2122. In other embodiments, the second dust lip 2122 may also have multiple ventilation holes 2123 arranged at unequal intervals along the circumference. The multiple ventilation holes 2123 can serve as redundancy or backup, reducing the probability of vacuum formation in the first annular cavity 213. Furthermore, when the multiple ventilation holes 2123 are arranged at equal intervals along the circumference of the second dust lip 2122, localized vacuum problems that could lead to localized wear of the second dust lip 2122 can be avoided.

[0052] In some embodiments, the seal assembly 100 is further provided with a spring 30, which is configured to engage radially outwardly of the main lip 211. When the seal assembly 100 is installed between the first component 200 and the second component 300, the spring 30 helps the main lip 211 of the sealing lip 21 to maintain contact with the second component 300, preventing contaminants that have entered the first annular cavity 213 from passing through the main lip 211 into the cavity axially to one side of the main lip 211. Furthermore, the spring 30 stabilizes the position of the main lip 211, preventing the main lip 211 from moving in the axial direction A during high-speed rotation of the second component 300, which could accelerate wear of the main lip 211 and reduce the sealing performance of the seal assembly 100.

[0053] It will be appreciated that the terms "first," "second," and the like are used to describe various structures, but these structures should not be limited to these terms. These terms are merely used to distinguish structures of the same type from one another and do not imply a particular order or importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, the first dust lip 2121 could also be referred to as the second dust lip 2122, and similarly, the second dust lip 2122 could also be referred to as the first dust lip 2121, without departing from the scope of the present invention.

[0054] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0055] It should be understood that the present invention is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the scope of the appended claims.

Claims

1. A sealing assembly (100), characterized in that: A sealing assembly (100) is used for sealing between a first component (200) and a second component (300) that are capable of relatively rotating, and comprises: a skeleton (10); and a sealing body (20), wherein the sealing body (20) is attached to the outer wall of the frame (10), the sealing body (20) is provided with a sealing lip (21), the sealing lip (21) is in dynamic contact with the second component (300), the sealing lip (21) comprises a main lip (211) and a dust lip (212), the main lip (211) and the dust lip (212) are axially spaced and form a first annular cavity 213 with the second component (300), The dust lip (212) comprises at least a first dust lip (2121) and a second dust lip (2122), wherein the second dust lip (2122) is used for dynamically abutting against the second component (300), and the second dust lip (2122) is provided with a ventilation hole (2123) penetrating the second dust lip (2122), and the ventilation hole (2123) is communicated with the first annular cavity (213), and the first dust lip (2121) is located on a side of the second dust lip (2122) away from the first annular cavity (213) to cover the ventilation hole (2123) in the axial and radial directions.

2. The sealing assembly (100) according to claim 1, characterized in that: The first dust lip (2121) and the second dust lip (2122) extend from one axial side to the other axial side and extend obliquely from the radial outer side to the radial inner side, wherein the radial inner wall of the first dust lip (2121) is provided with a spiral groove (2124).

3. The sealing assembly (100) according to claim 1, characterized in that: When the second dust lip (2122) is not in dynamic contact with the second component (300), the first dust lip (2121) and the second dust lip (2122) are spaced apart to form a second annular cavity (2125), the second annular cavity (2125) is connected to the outside, and the ventilation hole (2123) connects the first annular cavity (213) and the second annular cavity (2125).

4. The sealing assembly (100) according to claim 3, characterized in that: When the second dust lip (2122) is in dynamic contact with the second component (300), the radially inner free end of the second dust lip (2122) is radially deformed and at least partially fits with the radially inner free end of the first dust lip (2121).

5. The sealing assembly (100) according to claim 3, characterized in that: The free end on the radial inner side of the first dust lip (2121) and the free end on the radial inner side of the second dust lip (2122) together form an annular opening of the second annular cavity (2125), and the ventilation hole (2123) is located on the radial outer side of the second dust lip (2122) away from the annular opening.

6. The sealing assembly (100) according to claim 1, characterized in that: An extension direction of the ventilation hole (2123) is perpendicular to a radial outer wall of the second dust lip (2122).

7. The sealing assembly (100) according to claim 1, characterized in that: A plurality of ventilation holes (2123) are arranged at equal intervals along the circumference of the second dust lip (2122).

8. The sealing assembly (100) according to claim 7, characterized in that: The first dust lip (2121) is a continuous and uninterrupted annular structure in the circumferential direction.

9. The sealing assembly (100) according to claim 7, characterized in that: A plurality of the first dust lips (2121) are arranged in the circumferential direction and match the positions and quantities of the ventilation holes (2123).

10. The sealing assembly (100) according to any one of claims 1 to 9, characterized in that: The first dust lip (2121) and the second dust lip (2122) are integrally demoulded.

11. The sealing assembly (100) according to any one of claims 1 to 9, characterized in that: The first dust lip (2121) and the second dust lip (2122) are arranged separately, and are fixed to a side of the second dust lip (2122) away from the first annular cavity (213) by gluing.

12. The sealing assembly (100) according to claim 1, characterized in that: The main lip (211) is located on one axial side of the frame (10); and The dust lip (212) is located on the other axial side of the frame (10).

13. A bearing, characterized in that: The invention comprises a sealing assembly (100) as claimed in any one of claims 1 to 10.

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