CN214945808U

CN214945808U - Seal structure, wheel hub bearing and car

Info

Publication number: CN214945808U
Application number: CN202120207494.6U
Authority: CN
Inventors: 马宗杰; 井媛媛; 安迎迎
Original assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Current assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-11-30
Anticipated expiration: 2031-01-26

Abstract

The utility model relates to a seal structure, wheel hub bearing and car in the use, is located seal structure between the outer lane of axle body and inner circle to corresponding the cover respectively with first ring skeleton and second ring skeleton and locating outer lane and inner circle, make seal structure seal between outer lane and inner circle. Because be equipped with the arch on the second ring skeleton, and have the first sealed face that the slope set up in the arch, consequently, when water or dust got into the seal chamber, the first seal lip of pressurized reduced through having the guide of the first sealed face of slope down with the impact of second ring skeleton contact segment for the magnitude of interference between first seal lip and the second ring skeleton reduces, thereby is favorable to reducing wheel hub bearing's torque. Simultaneously, when intaking in the sealed chamber, the liquid can extrude first seal lip, owing to receive the first sealed face supporting role that the slope set up, consequently, combine inseparabler between first seal lip and the first sealed face, reinforcing wheel hub bearing's sealed effect.

Description

Seal structure, wheel hub bearing and car

Technical Field

The utility model relates to a bearing seal technical field especially relates to seal structure, wheel hub bearing and car.

Background

At present, with the continuous improvement of the requirement on the cruising ability of a new energy automobile, the requirement on the wheel hub bearing torsion moment for the automobile is more and more severe. The main function of the hub bearing (hub bearing) is to bear load and provide precise guidance for the rotation of the hub, and the hub bearing bears axial load and radial load and is a very important part.

In order to ensure the stable operation of the hub bearing and avoid the permanent failure of the bearing caused by the damage of the raceway of the inner ring, a sealing structure is usually added between the inner ring and the outer ring of the hub bearing to prevent water or dust from entering the bearing. In order to obtain better sealing performance, the interference between the sealing lip and the inner sealing ring framework needs to be increased, however, the overall torsional moment of the hub bearing is easily increased.

SUMMERY OF THE UTILITY MODEL

Therefore, a sealing structure, a hub bearing and an automobile are needed to be provided, the sealing performance is ensured, and meanwhile the interference magnitude between the sealing lip and the ring framework is reduced, so that the torsional moment of the hub bearing is reduced.

A sealing structure, comprising: the first ring framework is sleeved on the outer ring of the bearing body; the sealing ring is arranged on the first ring framework; the second ring framework is arranged on the sealing ring and forms a sealing cavity with the sealing ring, the second ring framework faces towards one side face in the sealing cavity and is provided with a protrusion, a first sealing face is arranged on the protrusion and is arranged in an inclined mode on the protrusion, a first sealing lip is arranged on the sealing ring and is abutted to the first sealing face, and the second ring framework is used for being sleeved on the inner ring of the bearing body.

In the use process of the sealing structure, the sealing structure is positioned between the outer ring and the inner ring of the shaft body, and the first ring framework and the second ring framework are respectively and correspondingly sleeved on the outer ring and the inner ring, so that the sealing structure is sealed between the outer ring and the inner ring. Because be equipped with the arch on the second ring skeleton, and have the first sealed face that the slope set up in the arch, consequently, when water or dust got into the seal chamber, the first seal lip of pressurized reduced through having the guide of the first sealed face of slope down with the impact of second ring skeleton contact segment for the magnitude of interference between first seal lip and the second ring skeleton reduces, thereby is favorable to reducing wheel hub bearing's torque. Simultaneously, when intaking in the sealed intracavity, the liquid can extrude first seal lip, owing to receive the first sealed face supporting role that the slope set up, consequently, combine inseparabler between first seal lip and the first sealed face to be favorable to strengthening the sealed effect of wheel hub bearing.

In one embodiment, the protrusion is further provided with a second sealing surface, one end of the first sealing surface facing the sealing ring and one end of the second sealing surface facing the sealing ring are inclined to each other, the sealing ring is provided with a second sealing lip, and the second sealing lip abuts against the second sealing surface.

In one embodiment, the distance D between the first sealing lip and the second sealing lip₁The size of the first sealing lip is gradually increased from one end of the first sealing lip close to the sealing ring to one end of the second sealing lip close to the second ring framework.

In one embodiment, the protrusion is formed by the second ring frame being arched towards the sealing cavity, and a groove is formed on a side of the second ring frame facing away from the sealing cavity.

In one embodiment, the second ring frame includes a sleeve portion and a sealing portion disposed along a circumferential direction of the sleeve portion, the sleeve portion is configured to be sleeved on an inner ring of the bearing body, the sealing ring is sleeved on the sleeve portion and surrounds the sealing cavity with the sleeve portion and the sealing portion, and the protrusion is disposed on the sealing portion.

In one embodiment, a raised portion is arranged at one end, away from the sealing portion, of the shaft sleeve portion, and the sealing ring is provided with a third sealing lip which abuts against the raised portion.

In one embodiment, the raised portion has an outer diameter D₂The distance from one end of the tilting part close to the sealing part to one end of the tilting part far away from the sealing part is gradually increased.

In one embodiment, the seal structure includes a seal member for sealing engagement between the raised portion and the inner race of the bearing body.

A hub bearing comprises a bearing body and the sealing structure, wherein the bearing body comprises an inner ring and an outer ring sleeved on the inner ring, the sealing structure is positioned between the inner ring and the outer ring, a first ring framework sleeve is arranged on the outer ring, and a second ring framework sleeve is arranged on the inner ring.

The hub bearing adopts the sealing structure, and in the using process, the sealing structure is positioned between the outer ring and the inner ring of the shaft body, and the first ring framework and the second ring framework are respectively sleeved on the outer ring and the inner ring correspondingly, so that the sealing structure is sealed between the outer ring and the inner ring. Because be equipped with the arch on the second ring skeleton, and have the first sealed face that the slope set up in the arch, consequently, when water or dust got into the seal chamber, the first seal lip of pressurized reduced through having the guide of the first sealed face of slope down with the impact of second ring skeleton contact segment for the magnitude of interference between first seal lip and the second ring skeleton reduces, thereby is favorable to reducing wheel hub bearing's torque. Simultaneously, when intaking in the sealed intracavity, the liquid can extrude first seal lip, owing to receive the first sealed face supporting role that the slope set up, consequently, combine inseparabler between first seal lip and the first sealed face to be favorable to strengthening the sealed effect of wheel hub bearing.

An automobile comprising the hub bearing described above.

The automobile adopts the sealing structure, in the using process, the sealing structure is positioned between the outer ring and the inner ring of the shaft body, and the first ring framework and the second ring framework are respectively sleeved on the outer ring and the inner ring correspondingly, so that the sealing structure is sealed between the outer ring and the inner ring. Because be equipped with the arch on the second ring skeleton, and have the first sealed face that the slope set up in the arch, consequently, when water or dust got into the seal chamber, the first seal lip of pressurized reduced through having the guide of the first sealed face of slope down with the impact of second ring skeleton contact segment for the magnitude of interference between first seal lip and the second ring skeleton reduces, thereby is favorable to reducing wheel hub bearing's torque. Simultaneously, when intaking in the sealed intracavity, the liquid can extrude first seal lip, owing to receive the first sealed face supporting role that the slope set up, consequently, combine inseparabler between first seal lip and the first sealed face to be favorable to strengthening the sealed effect of wheel hub bearing.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a cross-sectional view of one half of a seal according to one embodiment;

fig. 2 is an enlarged view of the structure at circle a in fig. 1.

100. A sealing structure; 110. a first ring skeleton; 120. a seal ring; 121. a first seal lip; 122. a second sealing lip; 123. a third sealing lip; 124. sealing the cavity; 130. a second ring framework; 131. a boss portion; 132. a sealing part; 133. a protrusion; 1331. a first sealing surface; 1332. a second sealing surface; 134. a groove; 135. a raised portion; 140. and a seal.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In one embodiment, referring to fig. 1, since the sealing structure 100 is a ring-shaped structure with a top-bottom symmetry, only a half of the sealing structure 100 is shown in fig. 1. A sealing structure 100, the sealing structure 100 comprising: a first ring frame 110, a seal ring 120, and a second ring frame 130. The first ring frame 110 is disposed on the outer ring of the bearing body. The seal ring 120 is disposed on the first ring frame 110. The second ring frame 130 is disposed on the sealing ring 120, and forms a sealing cavity 124 with the sealing ring 120, and a protrusion 133 is disposed on a side surface of the second ring frame 130 facing the sealing cavity 124. The projection 133 is provided with a first sealing surface 1331. The first sealing surface 1331 is provided obliquely on the projection 133. The seal ring 120 is provided with a first seal lip 121. The first sealing lip 121 abuts against the first sealing surface 1331. The second ring frame 130 is disposed on the inner ring of the bearing body.

In the use process of the sealing structure 100, the sealing structure 100 is located between the outer ring and the inner ring of the shaft body, and the first ring framework 110 and the second ring framework 130 are respectively and correspondingly sleeved on the outer ring and the inner ring, so that the sealing structure 100 is sealed between the outer ring and the inner ring. Because the second ring frame 130 is provided with the protrusion 133, and the protrusion 133 is provided with the first sealing surface 1331 which is obliquely arranged, when water or dust enters the sealing cavity 124, the pressed first sealing lip 121 is guided by the first sealing surface 1331 with a slope, so that the impact of the contact part with the second ring frame 130 is reduced, the interference between the first sealing lip 121 and the second ring frame 130 is reduced, and the reduction of the torsional moment of the hub bearing is facilitated. Meanwhile, when water enters the sealing cavity 124, the liquid extrudes the first sealing lip 121, and the first sealing surface 1331 is supported by the inclined first sealing surface 1331, so that the first sealing lip 121 and the first sealing surface 1331 are combined more tightly, and the sealing effect of the hub bearing is enhanced.

The first sealing surface 1331 may be a flat surface or a curved surface. When the first sealing surface 1331 is curved, the first sealing surface 1331 may be an arcuate curved surface or a concave curved surface; even an arched curved surface and a concave curved surface can be mutually spliced curved surfaces, and the like, only the first sealing surface 1331 is required to be arranged on the bulge 133 in a certain gradient, so that the first sealing lip 121 can be guided by the first sealing surface 1331. In addition, the angle of inclination of the first sealing surface 1331 on the projection 133 may be determined according to the actual product size, such as: the inclination angle of the first sealing surface 1331 may be 5-45 °, and the like, and the embodiment provides only one possible inclination angle parameter, but not limited thereto.

Further, referring to fig. 1, a second sealing surface 1332 is further disposed on the protrusion 133. The end of the first sealing surface 1331 facing the sealing ring 120 and the end of the second sealing surface 1332 facing the sealing ring 120 are inclined towards each other. The seal ring 120 is provided with a second seal lip 122. The second sealing lip 122 abuts against the second sealing surface 1332. As can be seen, the first sealing surface 1331 and the second sealing surface 1332 of the present embodiment form an inverted "V" shaped structure. When water or dust enters the sealing cavity 124, the first sealing lip 121 and the second sealing lip 122 are respectively guided by the inverted V-shaped structure, so that the impact on the contact part with the second ring frame 130 is effectively reduced, and the interference between the first sealing lip 121 and the second sealing lip 122 and the second ring frame 130 is reduced. In addition, this embodiment additionally increases second seal lip 122 and conflict cooperation of second sealed face 1332, improves the sealing strength between sealing ring 120 and the second ring skeleton 130 to further promote the sealed effect of wheel hub bearing.

The second sealing surface 1332 may be a flat surface or a curved surface. When the second sealing surface 1332 is curved, the second sealing surface 1332 may be an arcuate curved surface or a concave curved surface; even an arched curved surface and a concave curved surface can be mutually spliced curved surfaces, and the like, only the second sealing surface 1332 is required to be arranged on the bulge 133 in a certain gradient, so that the second sealing lip 122 can be guided by the second sealing surface 1332. In addition, the angle of inclination of the second sealing surface 1332 on the projection 133 may be determined according to the actual product size, such as: the inclination angle of the second sealing surface 1332 may be 5-45 °, and the like, and the embodiment provides only one possible inclination angle parameter, but not limited thereto.

Further, referring to fig. 1, a distance D between the first sealing lip 121 and the second sealing lip 122₁The diameter increases from the end of the first seal lip 121 adjacent to the packing ring 120 to the end of the second seal lip 122 adjacent to the second ring frame 130. It can be seen that the first and

second lips

121, 122 also form an inverted V-shaped configuration on the seal ring 120, which allows the first and

second lips

121, 122 to better fit over the protrusion 133, thereby improving the compactness of the seal structure 100.

Alternatively, the first sealing lip 121 and the second sealing lip 122 are respectively mounted on the sealing ring 120 in a manner of bolting, clamping, pinning, riveting, bonding, or integrally molding. Wherein, the integrated molding mode can be injection molding.

In one embodiment, referring to fig. 1, the protrusion 133 is formed by the second ring frame 130 arching inward toward the seal cavity 124, and a groove 134 is formed on a side of the second ring frame 130 facing away from the seal cavity 124. Therefore, the protrusion 133 and the second ring frame 130 are integrated, and in the manufacturing process, the protrusion 133 structure can be formed only by bending the second ring frame 130 toward the inside of the sealing cavity 124, so that the manufacturing process of the protrusion 133 on the second ring frame 130 is greatly simplified. Meanwhile, the protrusion 133 and the second ring frame 130 are integrated, which is also beneficial to ensuring the structural strength of the protrusion 133 on the second ring frame 130, and improving the stability of the sealing structure 100.

It should be noted that the shape of the groove 134 can be various, for example, the shape of the groove 134 can be a semicircle, a V, a trapezoid, or other shapes.

Of course, in other embodiments, the protrusions 133 may be mounted on the second ring frame 130 in a combination manner, such as: the protrusions 133 are mounted on the second ring frame 130 by welding, bolting, clamping, riveting, pinning, or bonding.

In one embodiment, referring to fig. 1, the second ring frame 130 includes a sleeve portion 131 and a sealing portion 132 disposed along a circumferential direction of the sleeve portion 131. The sleeve portion 131 is used for being sleeved on the inner ring of the bearing body. The seal ring 120 is sleeved on the shaft sleeve portion 131, and encloses a seal cavity 124 with the shaft sleeve portion 131 and the seal portion 132. The protrusion 133 is provided on the sealing part 132. Thus, when the second ring frame 130 is engaged with the inner ring, the sleeve portion 131 is fitted over the inner ring; the sealing portion 132 is blocked between the outer ring and the inner ring to complete the sealing between the second ring frame 130 and the inner ring.

Further, referring to fig. 1 and fig. 2, referring to fig. 1, a tilting portion 135 is disposed at an end of the boss portion 131 away from the sealing portion 132. The sealing ring 120 is provided with a third sealing lip 123. The third lip 123 is abutted to the tilting portion 135, so that the sealing point between the sealing ring 120 and the second ring framework 130 support is increased by the cooperation of the third lip 123 and the tilting portion 135, and the sealing performance between the sealing ring 120 and the second ring framework 130 support is further improved.

Specifically, referring to fig. 1, the seal ring 120, the first seal lip 121, the second seal lip 122 and the third seal lip 123 are an integral structure. Meanwhile, the boss portion 131 and the sealing portion 132 are also formed as an integral structure.

Further, referring to fig. 2, the outer diameter D of the tilting portion 135₂And gradually increases from an end of the raised portion 135 close to the sealing portion 132 to an end of the raised portion 135 far from the sealing portion 132. Therefore, the outer diameter of the raised portion 135 of the present embodiment is larger toward the outside, so as to ensure that the third sealing lip 123 stably abuts against the raised portion 135, and effectively prevent the third sealing lip 123 from slipping off from one end of the raised portion 135 due to being pressed to be guidedThe dense seal structure 100 fails.

Specifically, referring to fig. 2, the inner diameter D of the tilting portion 135₃And gradually increases from an end of the raised portion 135 close to the sealing portion 132 to an end of the raised portion 135 far from the sealing portion 132.

In one embodiment, referring to fig. 2, the seal structure 100 includes a seal 140. The sealing element 140 is used for being in sealing fit between the tilting part 135 and the inner ring of the bearing body, so that the sealing performance between the tilting part 135 and the bearing body is improved, and the sealing effect of the hub bearing is greatly improved.

Alternatively, the material of the sealing member 140 may be rubber material such as NBR nitrile rubber, HNBR hydrogenated nitrile rubber, and SIL silicone rubber.

In one embodiment, referring to fig. 1, the first ring frame 110 is an "L" shaped structure and is attached to the sealing ring 120.

In an embodiment, please refer to fig. 1, a hub bearing includes a bearing body and the sealing structure 100 in any of the above embodiments, the bearing body includes an inner ring and an outer ring sleeved on the inner ring, the sealing structure 100 is located between the inner ring and the outer ring, the first ring frame 110 is sleeved on the outer ring, and the second ring frame 130 is sleeved on the inner ring.

In the hub bearing, by adopting the sealing structure 100, in the using process, the sealing structure 100 is located between the outer ring and the inner ring of the shaft body, and the first ring framework 110 and the second ring framework 130 are respectively and correspondingly sleeved on the outer ring and the inner ring, so that the sealing structure 100 is sealed between the outer ring and the inner ring. Because the second ring frame 130 is provided with the protrusion 133, and the protrusion 133 is provided with the first sealing surface 1331 which is obliquely arranged, when water or dust enters the sealing cavity 124, the pressed first sealing lip 121 is guided by the first sealing surface 1331 with a slope, so that the impact of the contact part with the second ring frame 130 is reduced, the interference between the first sealing lip 121 and the second ring frame 130 is reduced, and the reduction of the torsional moment of the hub bearing is facilitated. Meanwhile, when water enters the sealing cavity 124, the liquid extrudes the first sealing lip 121, and the first sealing surface 1331 is supported by the inclined first sealing surface 1331, so that the first sealing lip 121 and the first sealing surface 1331 are combined more tightly, and the sealing effect of the hub bearing is enhanced.

In one embodiment, please refer to fig. 1, a vehicle includes the hub bearing of the above embodiment.

In the automobile adopting the sealing structure 100, in the using process, the sealing structure 100 is located between the outer ring and the inner ring of the shaft body, and the first ring framework 110 and the second ring framework 130 are respectively and correspondingly sleeved on the outer ring and the inner ring, so that the sealing structure 100 is sealed between the outer ring and the inner ring. Because the second ring frame 130 is provided with the protrusion 133, and the protrusion 133 is provided with the first sealing surface 1331 which is obliquely arranged, when water or dust enters the sealing cavity 124, the pressed first sealing lip 121 is guided by the first sealing surface 1331 with a slope, so that the impact of the contact part with the second ring frame 130 is reduced, the interference between the first sealing lip 121 and the second ring frame 130 is reduced, and the reduction of the torsional moment of the hub bearing is facilitated. Meanwhile, when water enters the sealing cavity 124, the liquid extrudes the first sealing lip 121, and the first sealing surface 1331 is supported by the inclined first sealing surface 1331, so that the first sealing lip 121 and the first sealing surface 1331 are combined more tightly, and the sealing effect of the hub bearing is enhanced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed 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 such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A sealing structure, characterized in that the sealing structure comprises:

the first ring framework is sleeved on the outer ring of the bearing body;

the sealing ring is arranged on the first ring framework;

the second ring framework is arranged on the sealing ring and forms a sealing cavity with the sealing ring, the second ring framework faces towards one side face in the sealing cavity and is provided with a protrusion, a first sealing face is arranged on the protrusion and is arranged in an inclined mode on the protrusion, a first sealing lip is arranged on the sealing ring and is abutted to the first sealing face, and the second ring framework is used for being sleeved on the inner ring of the bearing body.

2. The sealing structure according to claim 1, wherein a second sealing surface is further provided on the protrusion, an end of the first sealing surface facing the sealing ring and an end of the second sealing surface facing the sealing ring are inclined toward each other, a second sealing lip is provided on the sealing ring, and the second sealing lip abuts against the second sealing surface.

3. The seal structure of claim 2, wherein a spacing D between the first and second seal lips₁The size of the first sealing lip is gradually increased from one end of the first sealing lip close to the sealing ring to one end of the second sealing lip close to the second ring framework.

4. The seal structure of claim 1, wherein the projection is formed by the second ring frame being bowed towards the seal cavity and forming a recess in a side of the second ring frame facing away from the seal cavity.

5. The sealing structure according to claim 1, wherein the second ring frame includes a sleeve portion and a sealing portion disposed along a circumferential direction of the sleeve portion, the sleeve portion is configured to be sleeved on the inner ring of the bearing body, the sealing ring is sleeved on the sleeve portion and surrounds the sealing cavity with the sleeve portion and the sealing portion, and the protrusion is disposed on the sealing portion.

6. The sealing structure according to claim 5, wherein a raised portion is provided at an end of the boss portion away from the sealing portion, and the sealing ring is provided with a third sealing lip which abuts against the raised portion.

7. The sealing structure of claim 6, wherein an outer diameter D of the raised portion₂The distance from one end of the tilting part close to the sealing part to one end of the tilting part far away from the sealing part is gradually increased.

8. The seal structure of claim 6, comprising a seal for sealing engagement between the raised portion and the inner race of the bearing body.

9. A hub bearing, comprising a bearing body and the sealing structure of any one of claims 1 to 8, wherein the bearing body comprises an inner ring and an outer ring sleeved on the inner ring, the sealing structure is located between the inner ring and the outer ring, the first ring framework is sleeved on the outer ring, and the second ring framework is sleeved on the inner ring.

10. An automobile comprising the hub bearing of claim 9.