Hub bearing structure capable of inflating and deflating tires in running process and vehicle

Abstract

The utility model discloses a hub bearing structure capable of inflating and deflating a tire in a driving process and a vehicle. According to the hub bearing structure capable of inflating and deflating the tire in the driving process, the inflating channel is formed in the hub bearing structure, and the air inlet connected with the vehicle-mounted inflating and deflating device is formed in the bearing outer flange which does not rotate along with the tire, so that the problems of winding and interference caused by the fact that the tire rotates to drive an inflating pipeline to rotate are solved; therefore, the tire is inflated and deflated in the driving process, the tire pressure is always in an ideal state, the intelligent level of a vehicle is greatly improved, and extremely high convenience and safety are provided for a vehicle owner; in addition, the air sealing structure is arranged, when the tire is inflated and deflated, the inflation channel and the roller path are sealed and isolated through the air sealing structure, air leakage is prevented, and the situation that the roller path is locally free of grease due to the fact that grease in the roller path is blown to the outer side due to too large air pressure can be avoided; and therefore, abnormal sound caused by damage to the raceway due to no grease on the local part of the raceway during movement is avoided.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a wheel hub bearing structure and vehicle that can inflate and deflate tires during driving. Background Technology

[0002] Modern off-road vehicles have increasingly higher requirements for tire pressure, and the overall performance of the vehicle is greatly affected by changes in tire pressure. If the tire pressure is not adjusted in time according to the current road conditions, it will greatly affect the driving performance of the vehicle and reduce the driving experience for the driver.

[0003] Off-road vehicles require tire pressure adjustment by inflating and deflating the tires to adapt to different road conditions. Traditional tire pressure adjustment methods require using tools brought by the vehicle at a repair shop or after parking to adjust the tire pressure, which cannot be done in real time while the vehicle is in motion, causing considerable inconvenience to the driver. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a wheel hub bearing structure and vehicle that can inflate and deflate tires during driving.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A wheel hub bearing structure capable of inflating and deflating tires during driving includes an internal inflation channel. The bearing structure comprises an inner bearing flange and an outer bearing flange fitted onto the inner flange. One end of the inner bearing flange has a flange connected to the wheel, and the outer bearing flange is connected to the vehicle's steering knuckle. The outer bearing flange has an air inlet connected to an onboard inflation / deflation device, and the inner bearing flange has an air outlet connected to the tire valve. The air inlet communicates with the air outlet through the inflation channel. A raceway is provided between the inner and outer bearing flanges, containing rolling elements. An airtight seal and a waterproof seal are also provided between the inner and outer bearing flanges. The airtight seal seals and isolates the inflation channel from the raceway during tire inflation / deflation.

[0007] Preferably, two rows of raceways are provided between the inner flange and the outer flange of the bearing. The gas sealing structure includes a first gas sealing element and a second gas sealing element disposed between the two rows of raceways. The inflation channel includes a first inflation channel disposed inside the outer flange of the bearing and a second inflation channel disposed inside the inner flange of the bearing. The first inflation channel is connected to the second inflation channel through the gap between the first gas sealing element and the second gas sealing element. The air inlet is connected to the first inflation channel, and the air outlet is connected to the second inflation channel.

[0008] Preferably, the first airtight component includes a skeleton and a sealing material covering the skeleton. One end of the outer diameter of the skeleton has a contact plane that fits against the inner wall of the outer flange of the bearing. The sealing material forms a raised ring at one end of the outer diameter of the skeleton, which protrudes from the surface of the contact plane. The sealing material forms a sealing lip at one end of the inner diameter of the skeleton. The sealing lip has an annular protrusion with a circular arc or triangular shape on the side away from the contact plane. The sealing lip has an annular groove on the side close to the contact plane, and a fastening ring is provided in the annular groove.

[0009] Preferably, the sealing lip on the side away from the contact plane is further provided with an oil reservoir lip for storing low rolling resistance grease.

[0010] Preferably, the waterproof sealing structure includes a first waterproof seal and a second waterproof seal, which are respectively disposed on the outer sides of the two raceways. The first waterproof seal includes an outer skeleton, a first inner skeleton, and a first sealing material covering the first inner skeleton. The first sealing material forms a first sealing lip that seals with the flange and a second sealing lip that seals with the bearing outer flange at one end of the outer diameter of the first inner skeleton. The first sealing material forms a third sealing lip and a fourth sealing lip at one end of the inner diameter of the first inner skeleton that seal with the inner wall of the outer skeleton. The side of the fourth sealing lip that contacts the inner wall of the outer skeleton has a first annular protrusion with a circular arc or triangular surface, and the other side of the fourth sealing lip has a first annular groove with a first fastening ring in the first annular groove.

[0011] Preferably, the first inner frame includes a first vertical portion disposed between the flange and the end of the bearing outer flange, a horizontal portion fitting against the inner wall of the bearing outer flange, and a second vertical portion disposed 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 one end of the bearing outer flange; and / or,

[0012] The outer frame includes a first horizontal part, a second horizontal part, and a connecting part connecting the first horizontal part and the second horizontal part. The third sealing lip cooperates with the inner wall of the connecting part to seal, and the fourth sealing lip cooperates with the inner wall of the second horizontal part to seal.

[0013] Preferably, the second waterproof seal includes a magnetic encoder skeleton, a second inner skeleton, and a second sealant covering the second inner skeleton. One end of the outer diameter of the second inner skeleton has a second contact plane that fits against the inner wall of the bearing outer flange. The second sealant forms a second protruding ring at one end of the outer diameter of the second inner skeleton, which protrudes from the surface of the second contact plane. The second sealant forms a fifth sealing lip and a sixth sealing lip at one end of the inner diameter of the second inner skeleton, which cooperate with and seal against the inner wall of the magnetic encoder skeleton. The side of the sixth sealing lip that contacts the inner wall of the magnetic encoder skeleton has a second annular protrusion with a circular arc or triangular surface. The other side of the sixth sealing lip has a second annular groove, and a second fastening ring is provided in the second annular groove.

[0014] Preferably, a cage is installed in the raceway, and the rolling elements are mounted on the cage.

[0015] Preferably, the rolling element is a steel ball, cylindrical roller, tapered roller, or needle roller.

[0016] A vehicle comprising a wheel hub bearing structure as described above, capable of inflating or deflating tires during driving.

[0017] The beneficial technical effects of this utility model are as follows: The aforementioned wheel hub bearing structure that can inflate and deflate tires during driving has an internal inflation channel, and the air inlet connected to the vehicle inflation / deflation device is located on the outer flange of the bearing, which does not rotate with the tire. This solves the problem of entanglement and interference caused by the tire rotating and causing the inflation pipeline to rotate. Thus, it enables tire inflation and deflation during driving, keeping the tire pressure at an ideal state, greatly improving the vehicle's intelligence level and providing drivers with high convenience and safety. In addition, an air-sealing structure is added between the inner and outer flanges of the bearing. When inflating or deflation the tire, the air-sealing structure seals and isolates the inflation channel from the raceway, preventing gas leakage. This avoids the situation where excessive air pressure blows the raceway grease to the outside during inflation or deflation, resulting in a lack of grease in certain parts of the raceway. This, in turn, avoids damage to the raceway caused by a lack of grease during operation, which can lead to abnormal noise. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of the wheel hub bearing structure of the present invention, which can inflate and deflate the tire during driving, in the first state.

[0019] Figure 2 This is a cross-sectional structural diagram of the wheel hub bearing structure of the present invention, which allows for tire inflation and deflation during driving, in the second state.

[0020] Figure 3 This is a cross-sectional structural diagram of the first airtight component of this utility model;

[0021] Figure 4 This is a cross-sectional structural diagram of the first waterproof seal of this utility model;

[0022] Figure 5 This is a cross-sectional structural diagram of the second waterproof seal of this utility model.

[0023] Reference numerals: 10-Bearing inner flange; 11-Flange; 12-Outlet; 13-Outlet connector; 14-Second inflation channel; 20-Bearing outer flange; 21-Inlet; 22-Inlet connector; 23-First inflation channel; 30-Rolling element; 40-First air seal; 41-Skeleton; 411-Contact plane; 42-Sealant; 421-Raised ring; 422-Sealing lip; 423-Annular protrusion; 424-Annular groove; 425-Oil reservoir lip; 43-Fastening ring; 50-Second air seal; 60-First waterproof seal; 61-Outer skeleton; 611-First horizontal part; 612-Second horizontal part; 613-Connecting part; 62-First inner skeleton; 6 21-First vertical part; 622-Horizontal part; 623-Second vertical part; 63-First sealant; 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 sealant; 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 Implementation

[0024] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] This invention provides a wheel hub bearing structure that allows for the inflation and deflation of tires during driving.

[0026] like Figure 1 , 2As shown in one embodiment of this utility model, the wheel hub bearing structure capable of inflating and deflating the tire during driving has an internal inflation channel. The wheel hub bearing structure capable of inflating and deflating the tire during driving includes an inner bearing flange 10 and an outer bearing flange 20 fitted on the inner bearing flange 10. One end of the inner bearing flange 10 is provided with a flange 11 connected to the wheel. The outer bearing flange 20 is connected to the vehicle steering knuckle. The outer bearing flange 20 is provided with an air inlet 21 connected to the vehicle inflation / deflation device. The inner bearing flange 10 is provided with an air outlet 12 connected to the tire valve. The air inlet 21 is connected to the air outlet 12 through the inflation channel. A raceway is provided between the inner bearing flange 10 and the outer bearing flange 20. A rolling element 30 is provided in the raceway. An airtight structure and a waterproof seal structure are also provided between the inner bearing flange 10 and the outer bearing flange 20. The airtight structure is used to seal and isolate the inflation channel from the raceway when inflating and deflating the tire.

[0027] In this embodiment, two rows of raceways are provided between the inner flange 10 and the outer flange 20 of the bearing, and a cage is installed in the raceways, with the rolling elements 30 mounted on the cage.

[0028] In this embodiment, the rolling element 30 is a steel ball; in other embodiments, the rolling element 30 may also be a cylindrical roller, a tapered roller, or a needle roller.

[0029] In this embodiment, the gas-tight structure includes a first gas-tight element 40 and a second gas-tight element 50, which are disposed facing each other between the two rows of raceways. The waterproof sealing structure includes a first waterproof sealing element 60 and a second waterproof sealing element 70, which are correspondingly disposed on the outer sides of the two rows of raceways.

[0030] In this embodiment, 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 through the gap between the first air seal 40 and the second air seal 50. 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.

[0031] The vehicle-mounted inflation / deflation device includes an air tank, an inflation / deflation valve, and a tire pressure monitoring sensor. The air inlet 21 is an M6 hole, connected to an air inlet connector 22, which is connected to the air tank via the inflation / deflation valve. The air outlet 12 is also an M6 hole, connected to an air outlet connector 13, which is connected to the tire valve via a pipe. Utilizing the rotating and non-rotating connection function of the bearing, the air inlet does not rotate, while the air outlet rotates with the tire. This solves the problem of entanglement and interference caused by the tire rotating and causing the inflation pipe to rotate. This allows for tire inflation / deflation during driving, and the tire pressure monitoring sensor provides real-time monitoring of the tire pressure, ensuring it remains at an ideal level. This significantly improves the vehicle's intelligence and provides drivers with high convenience and safety.

[0032] like Figure 3 As shown, in a preferred embodiment of the present invention, the first airtight component 40 includes a skeleton 41 and a sealing material 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 bearing outer flange 20. The sealing material 42 forms a raised ring 421 at one end of the outer diameter of the skeleton 41, which protrudes from the surface of the contact plane 411. The sealing material 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, and a fastening ring 43 is provided in the annular groove 424.

[0033] When inflating or deflating tires (see...) Figure 2 The convex ring 421 is press-fitted with the inner wall of the bearing outer flange 20 to achieve a seal, and the sealing lip 422, on the side away from the contact plane 411, is press-fitted with the outer wall of the bearing inner flange 10 to achieve a seal, thereby sealing and isolating the inflation channel from the raceway to prevent gas leakage. This avoids the raceway grease being blown outwards by excessive air pressure during inflation and deflation, resulting in a lack of grease in certain parts of the raceway, and thus avoids abnormal noise caused by damage to the raceway due to a lack of grease during operation; while when the tire is not being inflated or deflated (see...), Figure 1The first and second air seals 40 and 50 remain in a relaxed state, not in close contact with the inner flange 10 or outer flange 20 of the bearing. This reduces the rolling torque of the wheel hub bearing, thereby improving the vehicle's range when no inflation or deflation is required. The annular protrusion 423 increases the thickness and strength of the sealing lip 422, thereby enhancing its resistance to deformation and making it less prone to deformation under high pressure, thus improving the sealing stability of the first air seal 40. Furthermore, the fastening ring 43 further enhances the resistance to deformation of the sealing lip 422, further improving the sealing stability of the first air seal 40. The second air seal 50 has the same structure as the first air seal 40, and will not be described further here.

[0034] See also Figure 3 In a preferred embodiment of this invention, the sealing lip 422 is further provided with an oil reservoir lip 425 for storing low rolling resistance grease on the side away from the contact plane 411. The low rolling resistance grease stored in the oil reservoir lip 425 can reduce the rolling resistance of the wheel hub bearing, thereby increasing the vehicle's range and improving power economy.

[0035] like Figure 4 As shown, in a preferred embodiment of the present invention, 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 forms a first sealing lip 631 at one end of the outer diameter of the first inner skeleton 62, which cooperates with the flange 11 to seal, and a second sealing lip 632 at one end of the outer diameter of the bearing outer flange 20. The first sealant 63 forms a third sealing lip 633 and a fourth sealing lip 634 at one end of the inner diameter of the first inner skeleton 62, which cooperate with the inner wall of the outer skeleton 61 to seal. The side of the fourth sealing lip 634 that contacts the inner wall of the outer skeleton 61 is provided with a first annular protrusion 6341 with a surface in the shape of an arc or a triangle. The other side of the fourth sealing lip 634 is provided with a first annular groove 6342, and a first fastening ring 64 is provided in the first annular groove 6342. The first annular protrusion 6341 increases the thickness and strength of the fourth sealing lip 634, thereby enhancing the fourth sealing lip 634's resistance to deformation. This makes the fourth sealing lip 634 less prone to deformation when there is water pressure on the outside, thus preventing water from entering the bearing and causing problems such as bearing grease failure and abnormal noise. In addition, the fastening ring 64 can further enhance the fourth sealing lip 634's resistance to deformation, further ensuring that the fourth sealing lip 634 is less prone to deformation when there is water pressure on the outside.

[0036] See also Figure 4The 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. The third annular groove 65 into which one end of the bearing outer flange 20 is inserted can better achieve a sealing connection between the bearing outer flange 20 and the first waterproof seal 60. The outer frame 61 includes 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 cooperates with the inner wall of the connecting portion 613 for sealing, and the fourth sealing lip 634 cooperates with the inner wall of the second horizontal portion 612 for sealing.

[0037] like Figure 5 As shown, in a preferred embodiment of the present invention, 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. One end of the outer diameter of the second inner skeleton 72 has a second contact plane 721 that fits against the inner wall of the bearing outer flange 20. The second sealant 73 forms a second protruding ring 731 at one end of the outer diameter of the second inner skeleton 72, which protrudes from the surface of the second contact plane 721. The second sealant 73 forms a fifth sealing lip 732 and a sixth sealing lip 733 at one end of the inner diameter of the second inner skeleton 72, which cooperate with and seal against the inner wall of the magnetic encoder skeleton 71. The side of the sixth sealing lip 733 that contacts the inner wall of the magnetic encoder skeleton 71 is provided with a second annular protrusion 7331 with a surface in the shape of an arc or a triangle. The other side of the sixth sealing lip 733 is provided with a second annular groove 7332, and a second fastening ring 74 is provided in the second annular groove 7332. The second convex ring 731 is press-fitted with the inner wall of the bearing outer flange 20 to achieve a seal. The second annular protrusion 7331 increases the thickness and strength of the sixth sealing lip 733, thereby enhancing the deformation resistance of the sixth sealing lip 733. This makes the sixth sealing lip 733 less prone to deformation when there is water pressure on the outside, thus preventing water from entering the bearing and causing problems such as bearing grease failure and abnormal noise. In addition, the second fastening ring 74 can further enhance the deformation resistance of the sixth sealing lip 733, further ensuring that the sixth sealing lip 733 is less prone to deformation when there is water pressure on the outside.

[0038] This utility model also provides a vehicle including the aforementioned wheel hub bearing structure capable of inflating and deflating tires during driving. Utilizing this wheel hub bearing structure, tire inflation and deflation during driving can be achieved: when off-roading or driving on sand, tires can be deflated via the inflation / deflation valve to reduce tire pressure, improve tire grip, and prevent tire blowouts; when returning to the road after off-road driving, tires can be inflated through the inflation channel inside the wheel hub bearing structure, avoiding excessive fuel consumption and severe wear caused by low tire pressure, thus improving overall vehicle economy and safety.

[0039] The beneficial technical effects of this utility model are as follows:

[0040] 1. An inflation channel is set inside the bearing, and the air inlet connected to the vehicle inflation / deflation device is located on the outer flange of the bearing, which does not rotate with the tire. This solves the problem of entanglement and interference caused by the tire rotating and causing the inflation line to rotate. This allows the tire to be inflated or deflated during driving, keeping the tire pressure at an ideal level. This greatly improves the vehicle's intelligence level and provides car owners with high convenience and safety.

[0041] 2. Add an air-tight structure. The air-tight structure seals and isolates the inflation channel from the raceway during tire inflation and deflation, preventing gas leakage. This avoids the situation where excessive air pressure blows the raceway grease to the outside during inflation and deflation, resulting in a lack of grease in certain parts of the raceway. This also prevents damage to the raceway and abnormal noise caused by the lack of grease in certain parts of the raceway during operation.

[0042] 3. The air-tight structure is designed to be in close contact with the inner and outer flanges of the bearing when the tire is being inflated or deflated, but not when the tire is not being inflated or deflated. This reduces the rolling torque of the wheel hub bearing and thus improves the vehicle's range when the tire is not being inflated or deflated.

[0043] 4. The air-tight structure is equipped with an oil reservoir lip for storing low rolling resistance grease. The low rolling resistance grease stored in the oil reservoir lip can reduce the rolling resistance of the wheel hub bearing, thereby increasing the vehicle's range and improving power economy.

[0044] 5. The waterproof sealing structure includes a first waterproof seal and a second waterproof seal. By providing an annular protrusion on the fourth sealing lip of the first waterproof seal and an annular protrusion on the sixth sealing lip of the second waterproof seal, the thickness and strength of the fourth and sixth sealing lips are increased, and the deformation resistance of the fourth and sixth sealing lips is enhanced. This makes the waterproof sealing structure less prone to deformation when there is water pressure on the outside, thereby preventing water from entering the bearing and causing problems such as bearing grease failure and abnormal noise.

[0045] 6. Fastening rings are provided on the fourth sealing lip of the first waterproof seal and the sixth sealing lip of the second waterproof seal. The fastening rings can further enhance the deformation resistance of the fourth and sixth sealing lips, making the waterproof sealing structure less prone to deformation when there is water pressure on the outside.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments. All equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the present utility model.

Claims

1. A wheel hub bearing structure capable of inflating and deflating tires during driving, characterized in that: The wheel hub bearing structure, which allows for tire inflation and deflation during driving, has an internal inflation channel. This structure includes an inner bearing flange and an outer bearing flange fitted over the inner flange. One end of the inner bearing flange has a flange connected to the wheel, and the outer bearing flange is connected to the vehicle's steering knuckle. The outer bearing flange has an air inlet connected to an onboard inflation / deflation device, and the inner bearing flange has an air outlet connected to the tire valve. The air inlet communicates with the air outlet through the inflation channel. A raceway is provided between the inner and outer bearing flanges, containing rolling elements. An airtight seal and a waterproof seal are also provided between the inner and outer bearing flanges. The airtight seal seals and isolates the inflation channel from the raceway during tire inflation and deflation.

2. The wheel hub bearing structure as described in claim 1, which allows for tire inflation and deflation during driving, is characterized in that: Two rows of raceways are provided between the inner flange and the outer flange of the bearing. The gas sealing structure includes a first gas sealing element and a second gas sealing element disposed between the two rows of raceways. The inflation channel includes a first inflation channel disposed inside the outer flange of the bearing and a second inflation channel disposed inside the inner flange of the bearing. The first inflation channel is connected to the second inflation channel through the gap between the first gas sealing element and the second gas sealing element. The air inlet is connected to the first inflation channel, and the air outlet is connected to the second inflation channel.

3. The wheel hub bearing structure as described in claim 2, which allows for tire inflation and deflation during driving, is characterized in that: The first gas seal includes a skeleton and a sealant covering the skeleton. One end of the outer diameter of the skeleton has a contact plane that fits against the inner wall of the outer flange of the bearing. The sealant forms a raised ring at one end of the outer diameter of the skeleton, which protrudes from the surface of the contact plane. The sealant forms a sealing lip at one end of the inner diameter of the skeleton. The sealing lip has an annular protrusion with a circular arc or triangular shape on the side away from the contact plane. The sealing lip has an annular groove on the side close to the contact plane, and a fastening ring is provided in the annular groove.

4. The wheel hub bearing structure as described in claim 3, which allows for tire inflation and deflation during driving, is characterized in that: The sealing lip is further provided with an oil reservoir lip on the side away from the contact plane for storing low rolling resistance grease.

5. The wheel hub bearing structure as described in claim 2, which allows for tire inflation and deflation during driving, is characterized in that: The waterproof sealing structure includes a first waterproof seal and a second waterproof seal, which are respectively disposed on the outer sides of the two raceways. The first waterproof seal includes an outer skeleton, a first inner skeleton, and a first sealing material covering the first inner skeleton. The first sealing material forms a first sealing lip that mates with the flange and a second sealing lip that mates with the bearing outer flange at one end of the outer diameter of the first inner skeleton. The first sealing material forms a third sealing lip and a fourth sealing lip at one end of the inner diameter of the first inner skeleton that mate with the inner wall of the outer skeleton. The side of the fourth sealing lip that contacts the inner wall of the outer skeleton has a first annular protrusion with a circular arc or triangular surface, and the other side of the fourth sealing lip has a first annular groove with a first fastening ring in the first annular groove.

6. The wheel hub bearing structure as described in claim 5, which allows for tire inflation and deflation during driving, is characterized in that: The first inner frame includes a first vertical portion disposed between the flange and the end of the bearing outer flange, a horizontal portion fitting against the inner wall of the bearing outer flange, and a second vertical portion disposed 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 one end of the bearing outer flange to be inserted; and / or, The outer frame includes a first horizontal part, a second horizontal part, and a connecting part connecting the first horizontal part and the second horizontal part. The third sealing lip cooperates with the inner wall of the connecting part to seal, and the fourth sealing lip cooperates with the inner wall of the second horizontal part to seal.

7. The wheel hub bearing structure as described in claim 5, which allows for tire inflation and deflation during driving, is characterized in that: The second waterproof seal includes a magnetic encoder skeleton, a second inner skeleton, and a second sealant covering the second inner skeleton. One end of the outer diameter of the second inner skeleton has a second contact plane that fits against the inner wall of the bearing outer flange. The second sealant forms a second protruding ring at one end of the outer diameter of the second inner skeleton, which protrudes from the surface of the second contact plane. The second sealant forms a fifth sealing lip and a sixth sealing lip at one end of the inner diameter of the second inner skeleton, which cooperate with the inner wall of the magnetic encoder skeleton for sealing. The side of the sixth sealing lip that contacts the inner wall of the magnetic encoder skeleton has a second annular protrusion with a surface in the shape of an arc or a triangle. The other side of the sixth sealing lip has a second annular groove, and a second fastening ring is provided in the second annular groove.

8. The wheel hub bearing structure as described in claim 1, which allows for tire inflation and deflation during driving, is characterized in that: A cage is installed inside the raceway, and the rolling elements are mounted on the cage.

9. The wheel hub bearing structure as described in claim 8, which allows for tire inflation and deflation during driving, characterized in that: The rolling elements are steel balls, cylindrical rollers, tapered rollers, or needle rollers.

10. A vehicle, characterized in that: The vehicle includes a wheel hub bearing structure as described in any one of claims 1-9, which allows for tire inflation and deflation during driving.

Images