Hub bearing with dust ring

Abstract

This invention relates to the field of bearing technology, specifically to a wheel hub bearing with a dustproof ring. The wheel hub bearing includes an inner ring assembly, an outer ring assembly, a rolling assembly, a sealing assembly, and a dustproof assembly. The inner ring assembly includes an inner flange unit and an inner raceway unit; the outer ring assembly is fitted onto the inner raceway unit, with one end of the outer ring assembly spaced apart from the end face of the inner flange unit; the rolling assembly is disposed between the outer ring assembly and the inner ring assembly; the sealing assembly includes a first sealing unit and a second sealing unit, both disposed between the outer ring assembly and the inner ring assembly and on opposite sides of the rolling assembly, with the first sealing unit adjacent to the inner flange unit; the dustproof assembly is rotatably fitted onto the outer circumferential surface of the outer ring assembly adjacent to the inner flange unit. This solves the problem of short service life of the sealing lip in wheel hub bearings.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically, to a wheel hub bearing with a dustproof ring. Background Technology

[0002] Bearings are important components used for rotating supports in mechanical bodies. With the development of bearings, many types have emerged, and wheel hub bearings are one of them. Wheel hub bearings integrate components such as oil seals and wheel hubs into a single unit based on a basic rotating support. This makes installation more convenient and provides better sealing and higher precision, making them one of the key components of automobiles.

[0003] During the use of wheel hub bearings, the outer ring of the flange and the inner ring of the flange are sealed together by a sealing lip. However, the rubber sealing lip has a reduced service life when it is in contact with sand and water for a long time. Summary of the Invention

[0004] To address the problem of short service life of sealing lips in wheel hub bearings, this invention provides a wheel hub bearing with a dustproof ring, comprising:

[0005] An inner ring assembly, the inner ring assembly comprising an inner flange unit and an inner raceway unit;

[0006] An outer ring assembly is fitted onto the inner raceway unit, with one end of the outer ring assembly spaced apart from the end face of the inner flange unit.

[0007] A rolling assembly disposed between the outer ring assembly and the inner ring assembly;

[0008] A sealing assembly, comprising a first sealing unit and a second sealing unit, wherein the first sealing unit and the second sealing unit are both disposed between the outer ring assembly and the inner ring assembly and arranged on both sides of the rolling assembly, and the first sealing unit is adjacent to the inner flange unit;

[0009] A dustproof assembly is fitted onto the outer peripheral surface of the outer ring assembly adjacent to the inner flange unit.

[0010] Optionally, the inner raceway unit includes a first raceway portion and a second raceway portion connected in sequence; the outer ring assembly includes a third raceway portion and a fourth raceway portion connected in sequence; the end of the third raceway portion is spaced apart from the end face of the inner flange unit; the rolling assembly includes a first rolling unit and a second rolling unit, the first rolling unit being disposed between the first raceway portion and the third raceway portion, and the second rolling unit being disposed between the second raceway portion and the fourth raceway portion; the first sealing unit being disposed between the first raceway portion and the third raceway portion, and the second sealing unit being disposed between the second raceway portion and the fourth raceway portion; the dustproof assembly is sleeved on the outer peripheral surface of the third raceway portion adjacent to the inner flange unit.

[0011] Optionally, the hub bearing further includes a fastener disposed on the inner flange unit. In the direction of the central axis of the inner ring assembly, there is a gap between the end of the third raceway portion and the end face of the inner flange unit. In the direction perpendicular to the central axis of the inner ring assembly, a portion of the projection of the fastener coincides with a portion of the end projection of the third raceway portion.

[0012] Optionally, the dustproof assembly includes a first annular unit and a second annular unit, the side of the first annular unit and the side of the second annular unit are connected, and there is an included angle α between the first annular unit and the second annular unit, the included angle α being between 60° and 120°; wherein, the first annular unit is sleeved on the outer peripheral surface of the third raceway portion, and the second annular unit is arranged at intervals with the fastener in the direction of the central axis of the inner ring assembly.

[0013] Optionally, the second annular unit includes an annular portion and an arc-shaped notch, and the side of the first annular unit is connected to the side of the annular portion; there are multiple fasteners, and the multiple fasteners pass through the arc-shaped notch and are disposed on the inner flange unit.

[0014] Optionally, there are multiple arc-shaped notches, which are spaced apart on the annular portion, and multiple fasteners pass through the multiple arc-shaped notches and are then mounted on the inner flange unit.

[0015] Optionally, the first sealing unit includes a first sealing skeleton and a first sealing part; a portion of the first sealing skeleton is fitted onto the third raceway portion, one end of the first sealing skeleton extends toward the first raceway portion and is spaced apart from the first raceway portion; the first sealing part is wrapped around the first sealing skeleton.

[0016] Optionally, the first sealing part includes a first body, a first abutting lip, a second abutting lip, a third abutting lip, and a blocking lip; the first body is wrapped around the first sealing skeleton, the roots of the first abutting lip, the second abutting lip, and the third abutting lip are respectively disposed on the first body, and the ends of the first abutting lip, the second abutting lip, and the third abutting lip respectively abut against the inner flange unit; the blocking lip is disposed on the first body, and the blocking lip is spaced apart from the inner flange unit and the fastener.

[0017] Optionally, in a direction perpendicular to the central axis of the inner ring assembly, the diameter of the blocking lip is larger than the diameter of the third raceway portion at the end adjacent to the inner flange unit.

[0018] Optionally, L1≤L2: where, in the direction perpendicular to the central axis of the inner ring assembly, the minimum distance between the outer peripheral surface of the blocking lip and the peripheral surface of the fastener is L1; and in the direction of the central axis of the inner ring assembly, the minimum distance between the side surface of the annular portion and the end face of the fastener is L2.

[0019] To address the problem of short service life of sealing lips in wheel hub bearings, this invention has the following advantages:

[0020] By setting an annular dustproof component at the end of the outer ring assembly, it is possible to effectively reduce the entry of sand, rainwater or snow into the sealing area where the first sealing unit is located, and to prevent large foreign objects from entering the sealing area where the first sealing unit is located. This effectively reduces the contact between the first sealing unit and external foreign objects, and in particular, reduces the wear of sand on the sealing lip and the corrosion of the sealing lip by water pollution, thus greatly extending the service life of the sealing lip. Attached Figure Description

[0021] Figure 1 A cross-sectional view of one embodiment of a hub bearing is shown;

[0022] Figure 2 Another cross-sectional view of one embodiment of the hub bearing is shown;

[0023] Figure 3 A partially enlarged schematic diagram of one embodiment of a hub bearing is shown;

[0024] Figure 4 A side view of one embodiment of a hub bearing is shown.

[0025] Figure label:

[0026] Inner ring assembly 10, inner flange unit 11, inner flange body 111, mounting hole 112, inner raceway unit 12, first raceway section 121, second raceway section 122.

[0027] Outer ring assembly 20, third raceway section 21, fourth raceway section 22.

[0028] Sealing assembly 30, first sealing unit 31, first sealing skeleton 311, first sealing part 312, first abutting lip 3121, second abutting lip 3122, third abutting lip 3123, blocking lip 3124, first body 3125, second sealing unit 32.

[0029] The rolling assembly 40 includes a first rolling unit 41, a first support bracket 411, a first rolling element 412, a second rolling unit 42, a second support bracket 421, and a second rolling element 422.

[0030] Dustproof component 50, first annular unit 51, second annular unit 52, annular portion 521, arc-shaped notch 522, fastener 60, brake disc 70. Detailed Implementation

[0031] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0032] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0033] Bearings are important components used for rotating supports in mechanical bodies. With the development of bearings, many types have emerged, and wheel hub bearings are one of them. Wheel hub bearings integrate components such as oil seals and wheel hubs into a single unit based on a basic rotating support. This makes installation more convenient and provides better sealing and higher precision, making them one of the key components of automobiles.

[0034] During use, wheel hub bearings are sealed together by a sealing lip made of rubber, connecting the outer and inner rings of the flange. However, a gap exists between the end of the outer flange and the inner face of the inner flange, allowing foreign objects to enter the sealing area and cause wear and corrosion to the sealing lip, thus reducing its service life.

[0035] Example 1:

[0036] In this embodiment, as Figure 1 As shown, to address the problem of short service life of sealing lips in wheel hub bearings, this invention provides a wheel hub bearing with a dustproof ring. The wheel hub bearing specifically includes an inner ring assembly 10, an outer ring assembly 20, a rolling assembly 40, a sealing assembly 30, and a dustproof assembly 50.

[0037] The inner ring assembly 10 includes an inner flange unit 11 and an inner raceway unit 12; in a direction perpendicular to the central axis of the inner ring assembly 10, the diameter of the inner flange unit 11 is larger than the diameter of the inner raceway unit 12. The outer ring assembly 20 is fitted onto the inner raceway unit 12, with one end of the outer ring assembly 20 spaced apart from the end face of the inner flange unit 11; in a direction perpendicular to the central axis of the inner ring assembly 10, the diameter of the inner flange unit 11 is also larger than the diameter at the end face of the outer ring assembly 20. Therefore, the inner flange unit 11 provides protection for the area to be sealed between the outer ring assembly 20 and the inner raceway unit 12.

[0038] The rolling assembly 40 is disposed between the outer ring assembly 20 and the inner ring assembly 10; the sealing assembly 30 includes a first sealing unit 31 and a second sealing unit 32, both of which are disposed between the outer ring assembly 20 and the inner ring assembly 10 and are arranged on both sides of the rolling assembly 40, with the first sealing unit 31 adjacent to the inner flange unit 11.

[0039] During the use of wheel hub bearings, the sealing area of ​​the first sealing unit 31 in the wheel hub bearing is in communication with the external environment. Foreign objects and sewage can enter the sealing area through the gap between the end of the outer ring assembly 20 and the end face of the inner flange unit 11, thereby reducing the service life of the first sealing unit 31. The first sealing unit 31 is a sealing lip, and its material is rubber.

[0040] The dustproof component 50 is fitted onto the outer circumferential surface of the outer ring component 20 adjacent to the inner flange unit 11. By setting the annular dustproof component 50 at the entrance of the area where the first sealing unit 31 is located, foreign objects and sewage can be effectively blocked, reducing the frequency of contact between the first sealing unit 31 and external foreign objects and sewage, which is beneficial to extending the service life of the first sealing unit 31.

[0041] The outer ring assembly 20 is rotatably fitted onto the inner raceway unit 12, and the dustproof assembly 50 is fixedly mounted on the outer ring assembly 20, and the dustproof assembly 50 rotates together with the outer ring assembly 20.

[0042] In other embodiments, such as Figure 1As shown, a brake disc 70 is mounted on the fastener 60. In the direction perpendicular to the axis of the outer ring assembly 20, a portion of the brake disc 70 coincides with the dustproof assembly 50. Thus, the brake disc 70 can effectively prevent foreign objects from entering the gap between the dustproof assembly 50 and the inner flange unit 11.

[0043] Furthermore, such as Figure 1 , Figure 2 As shown, the inner raceway unit 12 includes a first raceway portion 121 and a second raceway portion 122; the outer ring assembly 20 includes a third raceway portion 21 and a fourth raceway portion 22 connected in sequence; the end of the third raceway portion 21 is spaced apart from the end face of the inner flange unit 11; the rolling assembly 40 includes a first rolling unit 41 and a second rolling unit 42, the first rolling unit 41 being disposed between the first raceway portion 121 and the third raceway portion 21, and the second rolling unit 42 being disposed between the second raceway portion 122 and the fourth raceway portion 22; a first sealing unit 31 being disposed between the first raceway portion 121 and the third raceway portion 21, and the second sealing unit 32 being disposed between the second raceway portion 122 and the fourth raceway portion 22. By setting two independent rolling support structures between the outer ring assembly 20 and the inner ring, namely the first rolling support structure composed of the first rolling unit 41, the first raceway 121 and the third raceway 21, and the second rolling support structure composed of the second rolling unit 42, the second raceway 122 and the fourth raceway 22, the two rolling support structures can more easily ensure that the relative distance between the outer ring assembly 20 and the inner ring assembly 10 remains unchanged, so that the pressure between the outer ring assembly 20 and the inner ring assembly 10 will not be biased towards the area where the first sealing unit 31 is located or the area where the second sealing unit 32 is located, which is beneficial to extending the service life of the first sealing unit 31 and the second sealing unit 32.

[0044] The dustproof component 50 is sleeved on the outer peripheral surface of the third raceway 21 adjacent to the inner flange unit 11. The dustproof component 50 is arranged adjacent to the end face of the inner flange unit 11, which makes the gap between the dustproof component 50 and the inner flange unit 11 smaller, which can more effectively block foreign objects from entering the sealing area where the first sealing unit 31 is located, and helps to extend the service life of the first sealing unit 31.

[0045] Furthermore, the first rolling unit 41 includes a first support bracket 411 and a plurality of first rolling elements 412 disposed on the first support bracket 411, and the second rolling unit 42 includes a second support bracket 421 and a plurality of second rolling elements 422 disposed on the second support bracket 421. The design of the first support bracket 411 and the second support bracket 421 effectively improves the stability of the first rolling elements 412 and the second rolling elements 422.

[0046] Furthermore, such as Figure 1As shown, the hub bearing also includes a fastener 60. In the direction of the central axis of the inner ring assembly 10, there is a gap between the end of the third raceway portion 21 and the end face of the inner flange unit 11. In the direction perpendicular to the central axis of the inner ring assembly 10, a portion of the projection of the fastener 60 coincides with a portion of the end projection of the third raceway portion 21. The fastener 60 is a bolt, which passes through the inner flange unit 11. The nut portion of the bolt is located above the inlet of the area where the first sealing unit 31 is located, effectively protecting the first sealing unit 31 and extending its service life.

[0047] Furthermore, such as Figure 2 , Figure 3 As shown, the dustproof assembly 50 includes a first annular unit 51 and a second annular unit 52. The sides of the first annular unit 51 and the second annular unit 52 are connected, and there is an included angle α between the first annular unit 51 and the second annular unit 52, which is between 60° and 120°. While there is an included angle α between the first annular unit 51 and the second annular unit 52, the diameter of the middle annular portion of the outer ring assembly 20 is larger than the diameter of the end portion of the outer ring assembly 20. Therefore, an annular groove can be formed between the second annular unit 52 and the middle annular portion of the outer ring assembly 20. This annular groove helps to better contain foreign objects, sewage, and snow, improving the overall dustproof effect of the dustproof assembly 50.

[0048] The first annular unit 51 is sleeved on the outer peripheral surface of the third raceway portion 21, and the second annular unit 52 is arranged at intervals with the fastener 60 in the direction of the central axis of the inner ring assembly 10.

[0049] In other embodiments, the included angle α is between 80° and 100°, thereby giving the second annular unit 52 a larger blocking height while keeping its size constant, thus improving the overall dustproof effect of the dustproof assembly 50. Most preferably, the included angle α is 90°, thereby giving the second annular unit 52 the maximum blocking height while keeping its size constant, thus improving the overall dustproof effect of the dustproof assembly 50.

[0050] Furthermore, such as Figure 4As shown, the second annular unit 52 includes an annular portion 521 and an arc-shaped notch 522. The side of the first annular unit 51 is connected to the side of the annular portion 521. Multiple fasteners 60 are provided, each passing through the arc-shaped notch 522 and mounted on the inner flange unit 11. The annular unit is first connected to the outer ring assembly 20. Then, the inner ring assembly 10 is installed inside the outer ring assembly 20, and finally, bolts are installed. Therefore, the arc-shaped notch 522 needs to be provided on the annular portion 521. By rotating the first annular unit 51, multiple bolts can be installed onto the inner flange unit 11 through the arc-shaped notch 522.

[0051] In other embodiments, the inner flange unit 11 includes an inner flange body 111 and a plurality of mounting holes 112. The mounting holes 112 are through holes through which the stud portion of a bolt passes. The end of the bolt is a circumferential surface, and the end of the bolt is press-fitted into the mounting hole 112 for fixation. By rotating the first annular unit 51, the arc-shaped notch 522 can be sequentially aligned with the plurality of mounting holes 112 to complete the bolt installation process.

[0052] Furthermore, such as Figure 4 As shown, there are multiple arc-shaped notches 522, which are spaced apart on the annular portion 521. Multiple fasteners 60 pass through the multiple arc-shaped notches 522 and are then mounted on the inner flange unit 11. By increasing the number of arc-shaped notches 522, the installation efficiency of bolts can be effectively improved.

[0053] Furthermore, such as Figure 3 As shown, the first sealing unit 31 includes a first sealing frame 311 and a first sealing portion 312; a portion of the first sealing frame 311 is fitted onto the third raceway portion 21, and one end of the first sealing frame 311 extends toward the first raceway portion 121 and is spaced apart from the first raceway portion 121; the first sealing portion 312 is wrapped around the first sealing frame 311. By wrapping the first sealing portion 312 around the first sealing frame 311, the stability of the first sealing portion 312 is effectively improved.

[0054] Furthermore, such as Figure 3As shown, the first sealing part 312 includes a first body 3125, a first abutting lip 3121, a second abutting lip 3122, a third abutting lip 3123, and a blocking lip 3124. The first body 3125 is wrapped around the first sealing skeleton 311. The roots of the first abutting lip 3121, the second abutting lip 3122, and the third abutting lip 3123 are respectively disposed on the first body 3125. The ends of the first abutting lip 3121, the second abutting lip 3122, and the third abutting lip 3123 respectively abut against the inner flange unit 11. The end of the first abutting lip 3121 faces the first rolling element 412. The first abutting lip 3121 is used to seal the lubricating oil inside the raceway. When pressure is generated inside the raceway, it will squeeze the inner surface of the first abutting lip 3121, making the contact between the first abutting lip 3121 and the inner surface of the inner ring assembly 10 tighter and the sealing effect better. Meanwhile, the end of the second abutment lip 3122 is oriented away from the first rolling element 412. The second abutment lip 3122 is used to seal liquids and foreign objects outside the raceway. When pressure is generated outside the raceway, it will squeeze the outer surface of the second abutment lip 3122, making the second abutment lip 3122 more tightly abut against the inner surface of the inner ring assembly 10 and the sealing effect better.

[0055] Furthermore, the third abutment lip 3123, as the outermost abutment sealing structure, can protect the second abutment lip 3122. A blocking lip 3124 is disposed on the first body 3125, and the blocking lip 3124 is spaced apart from the inner flange unit 11 and the fastener 60. During the use of the wheel hub bearing, the blocking lip 3124 is used to block foreign objects from entering. Simultaneously, it provides sufficient space for movement between itself and the inner flange unit 11 and the fastener 60, effectively preventing the blocking lip 3124 from directly pressing against the inner flange unit 11 and the fastener 60, thus extending the service life of the blocking lip 3124.

[0056] Furthermore, such as Figure 3 As shown, in the direction perpendicular to the central axis of the inner ring assembly 10, the distance between the outer peripheral surface of the blocking lip 3124 and the central axis of the inner ring assembly 10 is greater than the distance between the outer peripheral surface of the third raceway portion 21 and the central axis of the inner ring assembly 10. That is, in the direction perpendicular to the central axis of the inner ring assembly 10, the outer peripheral surface of the blocking lip 3124 is higher than the outer peripheral surface of the third raceway portion 21, so that a new receiving space can be formed between the side of the outer peripheral surface of the blocking lip 3124 and the second annular unit 52, which is beneficial for containing foreign objects and sewage, and can extend the service life of the first sealing unit 31.

[0057] Furthermore, such as Figure 3As shown, L1≤L2: where, in the direction perpendicular to the central axis of the inner ring assembly 10, the minimum distance between the outer peripheral surface of the blocking lip 3124 and the side surface of the fastener 60 is L1; and in the direction of the central axis of the inner ring assembly 10, the minimum distance between the side surface of the annular portion and the end face of the fastener 60 is L2. Especially in winter, during the use of the wheel hub bearing, some foreign objects and snow may accumulate at the inlet of the first sealing unit 31. When the inner ring assembly 10 rotates, the bolt rotates with the inner ring assembly 10, generating a large wind force. Since L1≤L2, foreign objects and snow are more likely to fly out from the gap between the side surface of the annular portion and the end face of the fastener 60.

[0058] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A hub bearing with a dustproof ring, characterized in that, The hub bearing includes: An inner ring assembly, the inner ring assembly comprising an inner flange unit and an inner raceway unit; An outer ring assembly is fitted onto the inner raceway unit, with one end of the outer ring assembly spaced apart from the end face of the inner flange unit. A rolling assembly disposed between the outer ring assembly and the inner ring assembly; A sealing assembly, comprising a first sealing unit and a second sealing unit, wherein the first sealing unit and the second sealing unit are both disposed between the outer ring assembly and the inner ring assembly and arranged on both sides of the rolling assembly, and the first sealing unit is adjacent to the inner flange unit; A dustproof assembly, wherein the dustproof assembly is sleeved on the outer peripheral surface of the outer ring assembly adjacent to the inner flange unit; Fasteners, the fasteners being disposed on the inner flange unit; The projection area of ​​the dustproof component on the axial direction of the inner ring component coincides with the projection area of ​​the fastener on the axial direction of the inner ring component; The outer ring assembly includes a third raceway portion; in the direction of the central axis of the inner ring assembly, there is a gap between the end of the third raceway portion and the end face of the inner flange unit, and in the direction perpendicular to the central axis of the inner ring assembly, a portion of the projection of the fastener coincides with a portion of the end projection of the third raceway portion. The dustproof assembly includes a first annular unit and a second annular unit, with the side of the first annular unit connected to the side of the second annular unit; the second annular unit includes an annular portion; the side of the first annular unit is connected to the side of the annular portion. The first sealing unit includes a first sealing skeleton and a first sealing part; the first sealing part is wrapped around the first sealing skeleton; the first sealing part includes a first body and a blocking lip; the blocking lip is disposed on the first body, and the blocking lip is spaced apart from the inner flange unit and the fastener respectively; In the direction perpendicular to the central axis of the inner ring assembly, the minimum distance between the outer peripheral surface of the blocking lip and the peripheral surface of the fastener is L1; in the direction of the central axis of the inner ring assembly, the minimum distance between the side surface of the annular portion and the end face of the fastener is L2; ​​L1≤L2.

2. A hub bearing with a dustproof ring according to claim 1, characterized in that, The inner raceway unit includes a first raceway section and a second raceway section connected in sequence. The outer ring assembly includes a third raceway section and a fourth raceway section connected in sequence; The rolling assembly includes a first rolling unit and a second rolling unit. The first rolling unit is disposed between the first raceway portion and the third raceway portion, and the second rolling unit is disposed between the second raceway portion and the fourth raceway portion. The first sealing unit is disposed between the first raceway portion and the third raceway portion, and the second sealing unit is disposed between the second raceway portion and the fourth raceway portion; The dustproof component is fitted onto the outer circumferential surface of the third raceway adjacent to the inner flange unit.

3. A hub bearing with a dustproof ring according to claim 2, characterized in that, The side of the first annular unit and the side of the second annular unit have an included angle α, which is between 60° and 120°. The first annular unit is sleeved on the outer circumferential surface of the third raceway portion, and the second annular unit is arranged at intervals with the fastener in the direction of the central axis of the inner ring assembly.

4. A hub bearing with a dustproof ring according to claim 3, characterized in that, The second annular unit includes an annular portion and an arc-shaped notch; There are multiple fasteners, and each of the multiple fasteners passes through the arc-shaped notch and is set on the inner flange unit.

5. A wheel hub bearing with a dustproof ring according to claim 4, characterized in that, The arc-shaped notches are multiple, and the multiple arc-shaped notches are arranged at intervals on the annular portion. The multiple fasteners pass through the multiple arc-shaped notches and are then placed on the inner flange unit.

6. A hub bearing with a dustproof ring according to claim 5, characterized in that, A portion of the first sealing skeleton is fitted onto the third raceway portion, and one end of the first sealing skeleton extends toward the first raceway portion and is spaced apart from the first raceway portion.

7. A hub bearing with a dustproof ring according to claim 6, characterized in that, The first sealing part includes a first body, a first abutting lip, a second abutting lip, a third abutting lip, and a blocking lip; The first body is wrapped around the first sealing skeleton, and the roots of the first abutting lip, the second abutting lip and the third abutting lip are respectively disposed on the first body, and the ends of the first abutting lip, the second abutting lip and the third abutting lip respectively abut on the inner flange unit.

8. A hub bearing with a dustproof ring according to claim 7, characterized in that, In a direction perpendicular to the central axis of the inner ring assembly, the diameter of the blocking lip is larger than the diameter of the third raceway portion at the end adjacent to the inner flange unit.

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