Hub bearing structure and vehicle

Abstract

A hub bearing structure, comprising a bearing inner flange (10), a bearing outer flange (20), a rolling body (30), an airtight seal structure and a waterproof seal structure. One end of the bearing inner flange (10) is provided with a flange plate (11), and the bearing outer flange (20) is connected to a vehicle steering knuckle. The bearing outer flange (20) is provided with an air inlet (21), and the bearing inner flange (10) is provided with an air outlet (12) connected to a tire valve stem, the air inlet (21) being communicated with the air outlet (12). The airtight seal structure comprises a first airtight seal member (40) and a second airtight seal member (50), the rolling body (30) being arranged between the first airtight seal member (40) and the second airtight seal member (50). Also disclosed is a vehicle comprising the hub bearing structure. The hub bearing structure achieves tire inflation and deflation during driving, thereby keeping the tire pressure always in an ideal state.

Description

Wheel hub bearing structure and vehicle Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202410828771.3, filed on June 25, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to, but is not limited to, the field of vehicle manufacturing technology, and in particular to a wheel hub bearing structure and a vehicle. BACKGROUND

[0003] Current off-road vehicles have higher requirements for tire air pressure, and the overall performance is greatly affected by the change of tire pressure. If the tire pressure cannot be adjusted in time according to the current road conditions, the driving performance of the vehicle will be greatly affected, and the driving experience of the vehicle owner will be reduced.

[0004] Off-road vehicles need to inflate and deflate tires to adjust tire pressure to adapt to different road conditions. SUMMARY

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] The present application provides a wheel hub bearing structure and a vehicle, which can inflate and deflate tires during driving.

[0007] In one aspect, the present application provides a wheel hub bearing structure, which has an inflation passage inside, and comprises a bearing inner flange, a bearing outer flange sleeved on the bearing inner flange, rolling elements arranged between the bearing inner flange and the bearing outer flange, an air-tight sealing structure and a waterproof sealing structure arranged between the bearing inner flange and the bearing outer flange, a flange plate connected with a wheel of the vehicle arranged at one end of the bearing inner flange, a steering knuckle of the vehicle connected with the bearing outer flange, an air inlet connected with a tire inflation and deflation device arranged on the bearing outer flange, an air outlet connected with a tire valve of the vehicle arranged on the bearing inner flange, and the air inlet and the air outlet being in communication through the inflation passage.

[0008] Optionally, the inflation passage comprises a first inflation passage arranged inside the bearing outer flange and a second inflation passage arranged inside the bearing inner flange, the first inflation passage and the second inflation passage being in communication, the air inlet being in communication with the first inflation passage, and the air outlet being in communication with the second inflation passage.

[0009] Optionally, the air-tight sealing structure comprises a first air-tight seal and a second air-tight seal, and the rolling body is arranged between the first air-tight seal and the second air-tight seal; the water-proof sealing structure comprises a first water-proof seal and a second water-proof seal, and the rolling body and the air-tight sealing structure are arranged between the first water-proof seal and the second water-proof seal.

[0010] Optionally, the first air-tight seal comprises a skeleton and a sealing material coated on the skeleton, an outer diameter end of the skeleton has a contact plane which is in close contact with an inner wall of the bearing outer flange, the sealing material forms a first convex ring protruding from the contact plane at an outer diameter end of the skeleton, the sealing material forms a sealing lip at an inner diameter end of the skeleton, a side of the sealing lip away from the contact plane is provided with an annular protrusion in a circular arc shape or a triangular shape, and a side of the sealing lip close to the contact plane is provided with an annular groove, and a fastening ring is arranged in the annular groove.

[0011] Optionally, the first water-proof seal comprises an outer skeleton, a first inner skeleton and a first sealing material coated on the first inner skeleton, the first sealing material forms a first sealing lip for sealing cooperation with the flange plate and a second sealing lip for sealing cooperation with the bearing outer flange at an outer diameter end of the first inner skeleton, and the first sealing material forms a third sealing lip and a fourth sealing lip for sealing cooperation with an inner wall of the outer skeleton at an inner diameter end of the first inner skeleton, a side of the fourth sealing lip in contact with the inner wall of the outer skeleton is provided with a first annular protrusion in a circular arc shape or a triangular shape, and another side of the fourth sealing lip is provided with a first annular groove, and a first fastening ring is arranged in the first annular groove.

[0012] Optionally, the first inner skeleton comprises a first vertical portion arranged between the flange plate and an end portion of the bearing outer flange, a horizontal portion in close contact with an inner wall of the bearing outer flange, and a second vertical portion arranged between the bearing inner flange and the bearing outer flange, the second sealing lip, the first vertical portion and the horizontal portion form a third annular groove for inserting an end portion of the bearing outer flange.

[0013] Optionally, the outer skeleton comprises a first horizontal portion, a second horizontal portion and a connecting portion connecting the first horizontal portion and the second horizontal portion, the third sealing lip is in sealing cooperation with an inner wall of the connecting portion, and the fourth sealing lip is in sealing cooperation with an inner wall of the second horizontal portion.

[0014] Optionally, the second waterproof seal comprises a magnetic encoder skeleton, a second inner skeleton, and a second sealant covering the second inner skeleton, wherein an outer diameter of the second inner skeleton has a second contact plane in contact with an inner wall of the bearing outer flange, and the second sealant forms a second convex ring protruding from the second contact plane at an outer diameter end of the second inner skeleton, and the second sealant forms a fifth seal lip and a sixth seal lip in cooperation with the inner wall of the magnetic encoder skeleton at an inner diameter end of the second inner skeleton, wherein a side of the sixth seal lip in contact with the inner wall of the magnetic encoder skeleton is provided with a second annular protrusion in a circular arc shape or a triangular shape, and the other side of the sixth seal lip is provided with a second annular groove, and the second annular groove is provided with a second fastening ring.

[0015] Optionally, two rows of rolling tracks are arranged between the bearing inner flange and the bearing outer flange, and a retainer is arranged in the rolling tracks, and the rolling elements are arranged on the retainer.

[0016] Optionally, the rolling elements are steel balls, cylindrical rollers, conical rollers, or needle rollers.

[0017] Optionally, the second air seal has the same structure as the first air seal.

[0018] Another aspect of the present application provides a vehicle comprising the hub bearing structure described above.

[0019] The hub bearing structure described above has an inflation channel inside, and an air inlet connected with a vehicle-mounted air charging and discharging device is arranged on the bearing outer flange which does not rotate with the tire, thereby solving the problem of pipe winding and interference caused by rotation of the inflation pipeline with the tire, and realizing inflation and deflation of the tire during driving, so that the tire pressure is always in an ideal state, and the intelligent level of the vehicle is greatly improved, providing high convenience and safety for the owner. In addition, the air seal structure is arranged between the bearing inner flange and the bearing outer flange, and the air seal structure and the waterproof seal structure are used to realize double sealing of the lubricating grease of the bearing rolling elements and the inflation channel, so as to prevent the lubricating grease and the gas from escaping and leaking.

[0020] Other aspects can be apparent after reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is a cross-sectional structure schematic diagram of the hub bearing structure of the present application.

[0022] FIG. 2 is a cross-sectional structure schematic diagram of the first air seal of the present application.

[0023] FIG. 3 is a cross-sectional structure schematic diagram of the first waterproof seal of the present application.

[0024] Fig. 4 is a schematic view of a second waterproof seal according to the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS 10 - inner flange of bearing; 11 - flange plate; 12 - air outlet; 13 - air outlet joint; 14 - second air charging passage; 20 - outer flange of bearing; 21 - air inlet; 22 - air inlet joint; 23 - first air charging passage; 30 - rolling element; 40 - first air seal; 41 - skeleton; 411 - contact plane; 42 - sealing compound; 421 - first convex ring; 422 - sealing lip; 423 - annular protrusion; 424 - annular groove; 43 - fastening ring; 50 - second air seal; 60 - first waterproof seal; 61 - outer skeleton; 611 - first horizontal portion; 612 - second horizontal portion; 613 - connecting portion; 62 - first inner skeleton; 621 - first vertical portion; 622 - horizontal portion; 623 - second vertical portion; 63 - first sealing compound; 631 - first sealing lip; 632 - second sealing lip; 633 - third sealing lip; 634 - fourth sealing lip; 6341 - first annular protrusion; 6342 - first annular groove; 64 - first fastening ring; 65 - third annular groove; 70 - second waterproof seal; 71 - magnetic encoder skeleton; 72 - second inner skeleton; 721 - second contact plane; 73 - second sealing compound; 731 - second convex ring; 732 - fifth sealing lip; 733 - sixth sealing lip; 7331 - second annular protrusion; 7332 - second annular groove; 74 - second fastening ring. DETAILED DESCRIPTION

[0026] In order to make ordinary skilled in the art more clearly understand the purpose, technical scheme and advantages of the present application, the present application is further described below in conjunction with the drawings and examples.

[0027] The conventional tire pressure adjustment method needs to use self-provided tools to charge and discharge the tire for adjusting the tire pressure in a repair shop or after parking, and cannot charge and discharge the tire in real time during vehicle driving, which causes great inconvenience to the vehicle owner.

[0028] Therefore, the present application provides a hub bearing structure which can charge and discharge the tire during driving.

[0029] As shown in Fig. 1, in one embodiment of the present application, an air filling channel is arranged inside the hub bearing structure, the hub bearing structure comprises a bearing inner flange 10, a bearing outer flange 20 sleeved on the bearing inner flange 10, rolling elements 30 arranged between the bearing inner flange 10 and the bearing outer flange 20, an air-tight sealing structure (i.e. air-tight sealing structure) and a waterproof sealing structure arranged between the bearing inner flange 10 and the bearing outer flange 20, the bearing inner flange 10 is provided with a flange plate 11 connected with a vehicle wheel at one end, the bearing outer flange 20 is connected with a vehicle steering knuckle, the bearing outer flange 20 is provided with an air inlet 21 connected with a vehicle-mounted air filling and discharging device, the bearing inner flange 10 is provided with an air outlet 12 connected with a tire valve, and the air inlet 21 is communicated with the air outlet 12 through the air filling channel.

[0030] The air-tight sealing structure comprises a first air-tight sealing member 40 and a second air-tight sealing member 50, and the rolling elements 30 are arranged between the first air-tight sealing member 40 and the second air-tight sealing member 50. The waterproof sealing structure comprises a first waterproof sealing member 60 and a second waterproof sealing member 70, and the rolling elements 30 and the air-tight sealing structure are arranged between the first waterproof sealing member 60 and the second waterproof sealing member 70.

[0031] In the embodiment, two rows of raceways are arranged between the bearing inner flange 10 and the bearing outer flange 20, and a retainer is arranged in the raceways, and the rolling elements 30 are arranged on the retainer.

[0032] In the embodiment, the rolling elements 30 are steel balls. In other embodiments, the rolling elements 30 can also be cylindrical rollers, conical rollers or needle rollers.

[0033] In the embodiment, the air filling channel comprises a first air filling channel 23 arranged inside the bearing outer flange 20 and a second air filling channel 14 arranged inside the bearing inner flange 10. The first air filling channel 23 is communicated with the second air filling channel 14. The air inlet 21 is communicated with the first air filling channel 23, and the air outlet 12 is communicated with the second air filling channel 14.

[0034] The vehicle-mounted air charging and discharging device comprises a gas storage tank, an air charging and discharging valve and a tire pressure detection sensor. The air inlet 21 is an M6 threaded hole, and the air inlet 21 is connected with an air inlet connector 22, and the air inlet connector 22 is connected with the gas storage tank through the air charging and discharging valve. The air outlet 12 is an M6 threaded hole, and the air outlet 12 is connected with an air outlet connector 13, and the air outlet connector 13 is connected with the tire valve through a pipeline. By using the connection function of the rotating part and the non-rotating part of the bearing, the air inlet end does not rotate, and the air outlet end rotates with the tire, which solves the problem of pipeline winding and interference caused by the rotation of the tire, so that the tire is charged and discharged during driving, and the tire pressure is monitored in real time through the tire pressure detection sensor, so that the tire pressure is always in an ideal state, and the intelligent level of the vehicle is greatly improved, providing high convenience and safety for the owner.

[0035] As shown in FIG. 2, in an optional embodiment of the present application, the first air seal 40 comprises a skeleton 41 and a sealing compound 42 wrapped on the skeleton 41. The outer diameter of the skeleton 41 has a contact plane 411 which is in contact with the inner wall of the bearing outer flange 20. The sealing compound 42 forms a first convex ring 421 protruding from the contact plane 411 at the outer diameter end of the skeleton 41. The sealing compound 42 forms a sealing lip 422 at the inner diameter end of the skeleton 41, and the sealing lip 422 is provided with an annular protrusion 423 with a circular arc or triangular shape away from the contact plane 411 side. The sealing lip 422 is provided with an annular groove 424 close to the contact plane 411 side, and the annular groove 424 is provided with a fastening ring 43. The first convex ring 421 is in interference fit with the inner wall of the bearing outer flange 20 to realize sealing, and the side of the sealing lip 422 away from the contact plane 411 is in interference contact with the outer wall of the bearing inner flange 10 to realize sealing. The annular protrusion 423 increases the thickness and strength of the sealing lip 422, thereby enhancing the anti-deformation ability of the sealing lip 422, so that the sealing lip 422 is not easy to deform under high pressure, and the sealing stability of the first air seal 40 is enhanced. In addition, the fastening ring 43 can further enhance the anti-deformation ability of the sealing lip 422, and further enhance the sealing stability of the first air seal 40. The second air seal 50 has the same structure as the first air seal 40, which will not be described here.

[0036] As shown in FIG. 3, in an optional embodiment of the present application, the first waterproof seal 60 comprises an outer skeleton 61, a first inner skeleton 62, and a first sealing compound 63 coated on the first inner skeleton 62. The first sealing compound 63 is formed with a first sealing lip 631 at one end of the outer diameter of the first inner skeleton 62 for sealing with the flange plate 11, and a second sealing lip 632 at the other end of the outer diameter of the first inner skeleton 62 for sealing with the bearing outer flange 20. The first sealing compound 63 is formed with a third sealing lip 633 and a fourth sealing lip 634 at one end of the inner diameter of the first inner skeleton 62 for sealing with the inner wall of the outer skeleton 61. The side of the fourth sealing lip 634 in contact with the inner wall of the outer skeleton 61 is provided with a first annular protrusion 6341 in the shape of a circular arc or a triangle, and the other side of the fourth sealing lip 634 is provided with a first annular groove 6342 in which a first fastening ring 64 is arranged. The first annular protrusion 6341 increases the thickness and strength of the fourth sealing lip 634, thereby enhancing the anti-deformation ability of the fourth sealing lip 634, so that the fourth sealing lip 634 is not easily deformed when there is water pressure on the outside, thereby avoiding problems such as water entering the bearing interior, causing the bearing grease to fail, and producing abnormal noise. In addition, the first fastening ring 64 can further enhance the anti-deformation ability of the fourth sealing lip 634, further ensuring that the fourth sealing lip 634 is not easily deformed when there is water pressure on the outside.

[0037] Referring back to FIG. 3, the first inner skeleton 62 comprises a first vertical portion 621 arranged between the flange plate 11 and the end of the bearing outer flange 20, a horizontal portion 622 in contact with the inner wall of the bearing outer flange 20, and a second vertical portion 623 arranged between the bearing inner flange 10 and the bearing outer flange 20. The second sealing lip 632, the first vertical portion 621, and the horizontal portion 622 enclose a third annular groove 65 for insertion of one end of the bearing outer flange 20. The insertion of one end of the bearing outer flange 20 into the third annular groove 65 can better achieve the sealed connection between the bearing outer flange 20 and the first waterproof seal 60. The outer skeleton 61 comprises a first horizontal portion 611, a second horizontal portion 612, and a connecting portion 613 connecting the first horizontal portion 611 and the second horizontal portion 612. The third sealing lip 633 is in sealing contact with the inner wall of the connecting portion 613, and the fourth sealing lip 634 is in sealing contact with the inner wall of the second horizontal portion 612.

[0038] As shown in FIG. 4, in an optional embodiment of the present application, the second waterproof seal 70 comprises a magnetic encoder skeleton 71, a second inner skeleton 72, and a second sealant 73 coated on the second inner skeleton 72. The second inner skeleton 72 has a second contact plane 721 on one end of the outer diameter of the second inner skeleton 72, which is in contact with the inner wall of the bearing outer flange 20. The second sealant 73 has a second convex ring 731 protruding from the second contact plane 721 on one end of the outer diameter of the second inner skeleton 72. The second sealant 73 has a fifth seal lip 732 and a sixth seal lip 733 on one end of the inner diameter of the second inner skeleton 72, which are in sealing contact with the inner wall of the magnetic encoder skeleton 71. The sixth seal lip 733 has a second annular protrusion 7331 with a circular or triangular surface on the side in contact with the inner wall of the magnetic encoder skeleton 71, and a second annular groove 7332 on the other side, in which a second fastening ring 74 is arranged. The second convex ring 731 is in interference fit with the inner wall of the bearing outer flange 20 to achieve sealing. The second annular protrusion 7331 increases the thickness and strength of the sixth seal lip 733, thereby enhancing the anti-deformation ability of the sixth seal lip 733, so that the sixth seal lip 733 is not easily deformed when there is water pressure on the outside, thereby avoiding water entering the bearing interior to cause problems such as failure of the bearing grease and abnormal noise. In addition, the second fastening ring 74 can further enhance the anti-deformation ability of the sixth seal lip 733, further ensuring that the sixth seal lip 733 is not easily deformed when there is water pressure on the outside. It should be noted that the magnetic encoder skeleton 71 described above can be a skeleton for mounting a magnetic encoder. As an example, the magnetic encoder can be a magnetic ring, which has 48 pairs of magnetic poles distributed thereon. The number of magnetic poles of the magnetic ring is sensed by a wheel speed sensor, and the vehicle speed is output by combining the algorithm.

[0039] During driving, in response to the inflation instruction, gas is released from the gas tank, passes through the bearing, and is inflated into the tire through the pipeline connected by the bearing; when deflating, the gas is discharged from the bearing through the inflation and deflation valve connected by the bearing. In this way, the tire can be inflated and deflated during driving. It should be understood that the bearing only provides a channel for inflation and deflation.

[0040] The present application also provides a vehicle comprising the hub bearing structure described above. With the above-mentioned hub bearing structure, the tire can be inflated and deflated during driving of the vehicle. When the vehicle needs to go off-road and drive on sand, the tire can be deflated through the inflation and deflation valve to reduce the tire pressure, improve the tire grip, and prevent tire blowout. When the vehicle ends off-road driving and returns to the road, the tire can be inflated during driving through the inflation channel inside the hub bearing structure to avoid the problem of high fuel consumption and severe wear caused by too low tire pressure, and improve the economy and safety of the vehicle.

[0041] The application can provide the following beneficial technical effects.

[0042] 1. The air filling channel is arranged in the bearing, and the air inlet connected with the vehicle-mounted air filling and discharging device is arranged on the bearing outer flange which does not rotate with the tire, so that the problem of pipe winding and interference caused by rotation of the tire is solved, and the tire is filled and discharged during driving, so that the tire pressure is always in an ideal state, and the intelligent level of the vehicle is greatly improved, and high convenience and safety are provided for the owner.

[0043] 2. The air-tight sealing structure is arranged between the bearing inner flange and the bearing outer flange, the air-tight sealing structure and the waterproof sealing structure are used to realize double sealing of the bearing rolling body lubricating grease and the air filling channel, and the lubricating grease and the gas are prevented from escaping and leaking outward.

[0044] 3. The waterproof sealing structure comprises a first waterproof sealing piece and a second waterproof sealing piece, the thickness and strength of the fourth sealing lip and the sixth sealing lip are increased by arranging the annular protrusions on the fourth sealing lip of the first waterproof sealing piece and the sixth sealing lip of the second waterproof sealing piece, and the anti-deformation ability of the fourth sealing lip and the sixth sealing lip is enhanced, so that the waterproof sealing structure is not easy to deform when water pressure exists on the outside, and water is prevented from entering the bearing to cause problems such as failure of the bearing grease and generation of abnormal noise.

[0045] 4. The fourth sealing lip of the first waterproof sealing piece and the sixth sealing lip of the second waterproof sealing piece are provided with fastening rings, the anti-deformation ability of the fourth sealing lip and the sixth sealing lip is further enhanced, and the waterproof sealing structure is not easy to deform when water pressure exists on the outside.

[0046] The above only some embodiments of the application, and does not make any form of the application. Those skilled in the art can make various equivalent changes and improvements on the basis of the above embodiments. Any equivalent changes or modifications made within the scope of claims shall fall within the protection scope of the application.

Claims

1. A wheel hub bearing structure for use in a vehicle, wherein the wheel hub bearing structure has an internal air-filling channel, the wheel hub bearing structure includes an inner bearing flange (10), an outer bearing flange (20) fitted on the inner bearing flange (10), rolling elements (30) disposed between the inner bearing flange (10) and the outer bearing flange (20), and an air-tight seal structure and a waterproof seal structure disposed between the inner bearing flange (10) and the outer bearing flange (20). The inner flange (10) of the bearing is provided with a flange (11) at one end for connection to the wheel of the vehicle, and the outer flange (20) of the bearing is connected to the steering knuckle of the vehicle. The outer flange (20) of the bearing is provided with an air inlet (21) connected to the vehicle inflation / deflation device, and the inner flange (10) of the bearing is provided with an air outlet (12) connected to the tire valve of the vehicle. The air inlet (21) is connected to the air outlet (12) through the inflation channel.

2. The hub bearing structure as described in claim 1, wherein: The inflation channel includes a first inflation channel (23) disposed inside the outer flange (20) of the bearing and a second inflation channel (14) disposed inside the inner flange (10) of the bearing. The first inflation channel (23) is connected to the second inflation channel (14), the air inlet (21) is connected to the first inflation channel (23), and the air outlet (12) is connected to the second inflation channel (14).

3. The hub bearing structure as described in claim 1 or 2, wherein: The airtight structure includes a first airtight element (40) and a second airtight element (50), and the rolling element (30) is disposed between the first airtight element (40) and the second airtight element (50). The waterproof sealing structure includes a first waterproof seal (60) and a second waterproof seal (70), and the rolling element (30) and the airtight structure are disposed between the first waterproof seal (60) and the second waterproof seal (70).

4. The hub bearing structure as described in claim 3, wherein: The first airtight element (40) includes a skeleton (41) and a sealant (42) covering the skeleton (41). One end of the outer diameter of the skeleton (41) has a contact plane (411) that fits against the inner wall of the outer flange (20) of the bearing. The sealant (42) has a first protruding ring (421) formed at one end of the outer diameter of the skeleton (41), which protrudes from the contact plane (411). The sealant (42) forms a sealing lip (422) at one end of the inner diameter of the skeleton (41). The sealing lip (422) has an annular protrusion (423) with a circular arc or triangular shape on the side away from the contact plane (411). The sealing lip (422) has an annular groove (424) on the side close to the contact plane (411). A fastening ring (43) is provided in the annular groove (424).

5. The hub bearing structure as described in claim 3 or 4, wherein: The first waterproof seal (60) includes an outer skeleton (61), a first inner skeleton (62), and a first sealant (63) covering the first inner skeleton (62). The first sealant (63) has a first sealing lip (631) that mates with the flange (11) and a second sealing lip (632) that mates with the bearing outer flange (20) at one end of the outer diameter of the first inner skeleton (62). The first sealant (63) has a third sealing lip (633) and a fourth sealing lip (634) formed at one end of the inner diameter of the first inner skeleton (62) to seal against the inner wall of the outer skeleton (61). The fourth sealing lip (634) has a first annular protrusion (6341) with a circular arc or triangular shape on one side in contact with the inner wall of the outer skeleton (61), and a first annular groove (6342) is provided on the other side of the fourth sealing lip (634), and a first fastening ring (64) is provided in the first annular groove (6342).

6. The hub bearing structure as described in claim 5, wherein: The first inner frame (62) includes a first vertical portion (621) disposed between the flange (11) and the end of the bearing outer flange (20), a horizontal portion (622) that fits against the inner wall of the bearing outer flange (20), and a second vertical portion (623) disposed between the bearing inner flange (10) and the bearing outer flange (20). The second sealing lip (632), the first vertical portion (621), and the horizontal portion (622) form a third annular groove (65) into which one end of the bearing outer flange (20) is inserted.

7. The hub bearing structure as described in claim 5 or 6, wherein: The exoskeleton (61) includes a first horizontal section (611), a second horizontal section (612), and a connecting section (613) connecting the first horizontal section (611) and the second horizontal section (612). The third sealing lip (633) seals against the inner wall of the connecting portion (613), and the fourth sealing lip (634) seals against the inner wall of the second horizontal portion (612).

8. The hub bearing structure as described in any one of claims 5 to 7, wherein: The second waterproof seal (70) includes a magnetic encoder skeleton (71), a second inner skeleton (72), and a second sealant (73) covering the second inner skeleton (72). The second inner frame (72) has a second contact plane (721) at one end of its outer diameter that fits against the inner wall of the bearing outer flange (20). The second sealant (73) has a second protruding ring (731) that protrudes from the second contact plane (721) at one end of the outer diameter of the second inner skeleton (72). The second sealant (73) has a fifth sealing lip (732) and a sixth sealing lip (733) formed at one end of the inner diameter of the second inner skeleton (72) to seal against the inner wall of the magnetic encoder skeleton (71). The sixth sealing lip (733) has a second annular protrusion (7331) with a circular arc or triangular shape on one side in contact with the inner wall of the magnetic encoder frame (71), and a second annular groove (7332) is provided on the other side of the sixth sealing lip (733), and a second fastening ring (74) is provided in the second annular groove (7332).

9. The hub bearing structure as described in any one of claims 1 to 8, wherein: Two rows of raceways are provided between the inner flange (10) and the outer flange (20) of the bearing. A cage is installed in the raceway, and the rolling element (30) is installed on the cage.

10. The hub bearing structure as described in claim 9, wherein: The rolling element (30) is made of steel ball, cylindrical roller, tapered roller or needle roller.

11. The hub bearing structure as described in claim 4, wherein: The second gas seal (50) has the same structure as the first gas seal (40).

12. A vehicle comprising a hub bearing structure as claimed in any one of claims 1-11.

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