A high load lightweight hub bearing assembly

Abstract

The application discloses a high-load light-weight hub bearing assembly and relates to the field of hub bearings.The hub bearing assembly comprises an outer ring body and an inner ring body, an oil throwing groove is arranged at the top of the outer ring body, wedge-shaped blocks are arranged at both sides of the oil throwing groove, a zirconium oxide carbon fiber composite oil absorption layer is arranged on the wedge-shaped blocks at the positions of the ball bodies, oil holes are arranged on the wedge-shaped blocks at the positions of both sides of the oil throwing groove, and one end of the oil holes is connected with the zirconium oxide carbon fiber composite oil absorption layer.The ball body is contacted with the zirconium oxide carbon fiber composite oil absorption layer, so that an oil film with a certain thickness is formed on the outer wall of the ball body.When the lubricating grease in the lubricating cavity is consumed to less than half of the inner space of the bearing, the frictional contact between the zirconium oxide carbon fiber composite oil absorption layer and the ball body is utilized to form an oil film with a certain thickness on the surface of the ball body, so that the lubricating grease is fully utilized and the waste of the lubricating grease is prevented.

Description

Technical Field

[0001] This invention relates to the field of wheel hub bearings, specifically to a high-load lightweight wheel hub bearing assembly. Background Technology

[0002] Bearings and wheel hubs are the core components of a car's wheel system. They work together to ensure the vehicle's driving performance and safety. The core function of bearings is to reduce friction and support the rotating shaft, while wheel hubs are rigid supports that connect the tires and the axles. Together, they mainly bear the weight of the car (i.e., radial load) transmitted through the suspension system and the axial load generated by the car's steering.

[0003] Existing wheel bearings are pre-lubricated with grease before production to lubricate the internal rollers and prevent high temperatures caused by hard contact between the balls and the bearing's inner wall. However, after prolonged use, these bearings gradually fail or are lost due to high-temperature oxidation, seal leaks, and contaminant intrusion. Initially, the grease filling is typically 1 / 3 to 2 / 3 of the bearing's internal space (too much grease can cause overheating and failure, while too little prevents the formation of a complete oil film). As a result, the grease in the bearing is consumed to about half its capacity. Simultaneously, the balls generate intense heat under sudden conditions (such as rapid acceleration, heavy-load climbing, or bearing jamming), making it difficult for an oil film to form quickly on their surface. This leads to a sharp decrease in the bearing's load-bearing capacity, increasing the risk of breakage during prolonged use. This process accelerates the frequency of grease replacement, and subsequent grease changes require complete drainage, resulting in significant waste and increased maintenance costs.

[0004] In summary, the above-mentioned structure will cause a sharp drop in the load-bearing capacity of the wheel hub bearing when faced with sudden working conditions during use. The grease will need to be replaced more frequently, and a large amount of grease will be wasted during replacement, which will increase the maintenance cost of the wheel hub bearing. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a high-load lightweight wheel hub bearing assembly to solve the technical problem that when faced with sudden working conditions, the load-bearing capacity of the wheel hub bearing will drop sharply, the grease will need to be replaced frequently, and a large amount of grease will be wasted during replacement, which will increase the maintenance cost of the wheel hub bearing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-load lightweight wheel hub bearing assembly, comprising an outer ring body and an inner ring body, wherein the outer ring body is snapped onto the outer wall of the inner ring body, and a lubrication cavity is formed between the outer ring body and the inner ring body, a ball body is provided between the outer ring body and the inner ring body, and an oil slinger groove is provided at the top of the outer ring body, wherein the oil slinger groove is located in the outer ring body and is arc-shaped, and wedge-shaped blocks are provided on both sides of the oil slinger groove at the ball body;

[0007] The wedge-shaped block has a zirconia carbon fiber composite oil-absorbing layer located at the ball body. Oil holes are provided on both sides of the oil slinger groove on the wedge-shaped block, with one end of the oil hole connected to the zirconia carbon fiber composite oil-absorbing layer. An array of heat dissipation fins is arranged in a ring around the lubrication cavity on the inner ring body.

[0008] By adopting the above technical solution, the ball bearing body will come into contact with the zirconia carbon fiber composite oil-absorbing layer, so that the lubricating oil in the zirconia carbon fiber composite oil-absorbing layer is coated on the outer wall of the ball bearing body and forms an oil film of a certain thickness. In this process, the ball bearing body can prevent the ball bearing body from generating violent heat, thereby improving the load-bearing capacity during heavy-load climbing of the vehicle. When the grease in the lubrication cavity is consumed to less than half of the bearing's internal space, the frictional contact between the zirconia carbon fiber composite oil-absorbing layer and the ball bearing body can be used to form an oil film of a certain thickness on the surface of the ball bearing body. At this time, there is no need to maintain and add grease, effectively reducing the frequency of grease maintenance and replacement, and making full use of the grease to prevent waste.

[0009] The present invention is further configured such that wedge-shaped rings are provided on both sides of the heat dissipation fins on the inner ring body, the wedge-shaped rings being arc-shaped and their arc-shaped faces being inclined to the inner side of the heat dissipation fins.

[0010] Preferably, during the rotation of the inner ring body via the drive shaft, the wedge-shaped ring prevents the lubricating oil between the heat dissipation fins from flowing to both sides. This ensures that a large amount of lubricating oil is thrown into the oil slinger during the rotation of the inner ring body, thereby guaranteeing the lubricating oil supply at the zirconia carbon fiber composite oil-absorbing layer. At the same time, when there is too much lubricating oil in the oil hole, it will flow downward through the wedge block to the outer surface of the wedge-shaped ring. At this time, the excess hot lubricating oil will flow to the bottom of the ball body through the wedge-shaped ring, further accelerating the formation rate of the oil film at the top of the ball body and effectively reducing the heat generation at the ball body.

[0011] The present invention is further configured such that the heat dissipation fins are symmetrically arranged on the inner ring body, and the heat dissipation fins themselves are arranged in an inclined surrounding manner.

[0012] Preferably, the combination of multiple sets of heat dissipation fins creates an inclined gap between them. During the rotation of the inner ring body, the inclined heat dissipation fins will throw the lubricating oil in the gap to both sides. At this time, most of the lubricating oil will be discharged to the zirconia carbon fiber composite oil absorption layer through the oil hole. During this process, even when there is a small amount of grease in the lubrication cavity, it can still ensure that a certain thickness of oil film is formed at each set of ball bodies during rotation, so as to make full use of the grease and further reduce the waste of grease.

[0013] The present invention is further configured such that the outer ring body and the inner ring body are respectively provided with an outer ring flange and an inner ring flange on their outer walls, and an array of bolt assemblies for installation are provided on both the outer ring flange and the inner ring flange.

[0014] Preferably, the inner ring flange is connected to the wheel by a bolt assembly, and the outer ring flange is connected to the fixing frame by a bolt assembly. During the process of the drive shaft driving the inner ring body to rotate, the outer ring body is in a stationary state, ensuring the generation of oil film on the inner wall ball body.

[0015] The present invention is further configured such that the inner wall of the inner ring body is provided with a spline hole, wherein the inner wall of the spline hole is roughened.

[0016] Preferably, the spline hole facilitates the connection between the drive shaft and the inner ring body, ensuring that the inner ring body rotates along with the drive shaft during rotation. At the same time, the rough texture increases the sliding friction between the drive shaft and the inner ring body.

[0017] The present invention is further configured such that ball grooves are provided on both the outer ring body and the inner ring body at the ball body, and a ball frame is provided between each group of ball bodies.

[0018] Preferably, the ball groove ensures that the ball bodies slide on the same horizontal plane between the two, which improves the stability of the oil film. Furthermore, the ball frame facilitates the even separation of the ball bodies, avoiding direct friction between the ball bodies and further ensuring the stability of the oil film on the outer wall of each set of ball bodies.

[0019] The invention is further configured such that the wedge-shaped block is provided with a groove, which is used for the detachable installation of the zirconia carbon fiber composite oil-absorbing layer.

[0020] Preferably, the groove design allows the zirconia carbon fiber composite oil-absorbing layer to be inserted into the interior, preventing excessive compression of the zirconia carbon fiber composite oil-absorbing layer during normal rotation of the ball bearing body. The detachable design facilitates subsequent replacement of the zirconia carbon fiber composite oil-absorbing layer by subsequent personnel, thereby improving the overall service life of the device.

[0021] The present invention is further configured such that sealing components are provided on both sides of the lubrication cavity, and the sealing components themselves are snap-fit ​​type.

[0022] Preferably, its sealing components mainly prevent large external dust and impurities from entering the bearing, and can also reduce the leakage of internal lubricating oil during operation. The snap-fit ​​design makes it easy for maintenance personnel to disassemble and replace it later.

[0023] The present invention is further configured such that the inner wall of the oil hole is provided with a smooth surface, and is located at one end of the zirconia carbon fiber composite oil-absorbing layer at an inclined downward orientation.

[0024] Preferably, since some grease may also be thrown into the oil hole, and since the lubricating oil has a certain degree of adhesion, the smooth surface is designed to prevent the grease from adhering to the inner wall of the oil hole, thus preventing the oil hole from becoming blocked over a long period of time. Furthermore, the downward tilt design facilitates the stable immersion of the lubricating oil in the oil hole into the zirconia carbon fiber composite oil-absorbing layer.

[0025] The present invention is further configured such that the two ends of the oil slinger are located on the outer ring body and are rounded.

[0026] Preferably, the lubricating oil thrown up by the heat dissipation fins will flow to both ends of the oil throwing groove under its own gravity. Due to its rounded corner design, it can effectively prevent the accumulation of lubricating oil at both ends of the oil throwing groove.

[0027] In summary, the present invention has the following main beneficial effects:

[0028] 1. This invention features an arc-shaped oil-slinging groove at the top of the outer ring body. As the inner ring body rotates rapidly under the action of the drive shaft, the heat dissipation fins on the inner ring body throw lubricating oil into the top oil-slinging groove. At this time, some lubricating oil will penetrate into the zirconia carbon fiber composite oil-absorbing layer through the oil holes. During the heavy-load climbing process of the vehicle, the top ball bearing body will come into contact with the zirconia carbon fiber composite oil-absorbing layer, so that the lubricating oil in the zirconia carbon fiber composite oil-absorbing layer is coated on the outer wall of the ball bearing body and forms an oil film of a certain thickness. This process can prevent the ball bearing body from generating intense heat and improve the load-bearing capacity of the vehicle during heavy-load climbing.

[0029] 2. This invention features an array of zirconia carbon fiber composite oil-absorbing layers surrounding the outer ring body. When the grease in the lubrication cavity is consumed to less than half of the bearing's internal space, the frictional contact between the zirconia carbon fiber composite oil-absorbing layers and the ball body allows an oil film of a certain thickness to form on the surface of the ball body. At this point, there is no need to add grease, effectively reducing the frequency of grease maintenance and replacement, and making full use of the grease to prevent waste. Furthermore, when the ball body at the top overheats due to a sudden situation, it will expand, and the lubricating oil in the zirconia carbon fiber composite oil-absorbing layers will be quickly squeezed out and flow, thereby dissipating some of the heat from the ball body and extending the overall service life of the device.

[0030] 3. This invention provides wedge-shaped rings on both sides of the heat dissipation fins. During the rotation of the inner ring body via the drive shaft, the wedge-shaped rings prevent the lubricating oil between the heat dissipation fins from flowing to both sides. This allows a large amount of lubricating oil to be thrown into the oil slinger during the rotation of the inner ring body, thus ensuring the supply of lubricating oil to the zirconia carbon fiber composite oil-absorbing layer. At the same time, the wedge-shaped rings are arc-shaped and inclined towards the inside of the heat dissipation fins. When there is too much lubricating oil in the oil hole, it will flow downward through the wedge block to the outer surface of the wedge-shaped ring. At this time, the excess hot lubricating oil will flow to the bottom of the ball body through the wedge-shaped ring, further accelerating the formation rate of the oil film at the top of the ball body and effectively reducing the heat generation at the ball body.

[0031] 4. This invention symmetrically arranges heat dissipation fins on the inner ring body, and the heat dissipation fins themselves are arranged in a ring. The combination of multiple sets of heat dissipation fins creates an inclined gap between them. During the rotation of the inner ring body, the inclined heat dissipation fins will throw the lubricating oil in the gap to both sides. At this time, most of the lubricating oil will be discharged to the zirconia carbon fiber composite oil absorption layer through the oil hole. During this process, even when there is a small amount of grease in the lubrication cavity, it can still ensure that a certain thickness of oil film is formed at each set of ball bodies during rotation, so as to make full use of the grease and further reduce the waste of grease. Attached Figure Description

[0032] Figure 1 This is a front perspective view of the present invention;

[0033] Figure 2 This is a rear perspective view of the present invention;

[0034] Figure 3 This is an exploded view of the present invention;

[0035] Figure 4 For the present invention Figure 3 Enlarged view of A in the middle;

[0036] Figure 5 This is a cross-sectional view of the present invention;

[0037] Figure 6 For the present invention Figure 5 Enlarged view of B in the middle;

[0038] Figure 7 This is an internal view of the present invention;

[0039] Figure 8 This is a schematic diagram of the inner ring body structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the outer ring body structure of the present invention;

[0041] Figure 10 This is a cross-sectional view of the outer ring body of the present invention;

[0042] Figure 11 This is a partial structural diagram of an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Outer ring body; 2. Inner ring body; 3. Outer ring flange; 4. Inner ring flange; 5. Sealing assembly; 6. Spline hole; 7. Ball groove; 8. Wedge ring; 9. Heat dissipation fins; 10. Groove; 11. Ball body; 12. Ball cage; 13. Oil slinger groove; 14. Lubrication cavity; 15. Zirconia carbon fiber composite oil-absorbing layer; 16. Oil hole; 17. Wedge block. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0046] The embodiments of the present invention will now be described.

[0047] Example 1: Please refer to Figures 1-10The high-load lightweight wheel hub bearing assembly shown includes an outer ring body 1, an inner ring body 2, a sealing assembly 5, a lubrication mechanism, a friction mechanism, and an oil slinger assembly. The inner ring body 2 has a spline hole 6 on its inner wall, and the inner wall of the spline hole 6 is roughened. The spline hole 6 facilitates the connection between the drive shaft and the inner ring body 2, ensuring that the inner ring body 2 rotates along with the drive shaft. An outer ring flange 3 and an inner ring flange 4 are respectively provided on the outer ring body 1 and the inner ring body 2. An array of bolt assemblies for installation are provided on both the outer ring flange 3 and the inner ring flange 4. The inner ring flange 4 is connected to the wheel through the bolt assemblies, and the outer ring flange 3 is connected to the fixing frame through the bolt assemblies. When the drive shaft drives the inner ring body 2 to rotate, the outer ring body 1 is in a stationary state, ensuring the formation of an oil film in the inner wall ball body 11.

[0048] Meanwhile, the outer ring body 1 and the inner ring body 2 are made of carburized bearing steel. After carburizing, the surface hardness can reach HRC 62-64, and the core toughness is effectively improved. At this time, the overall thickness can be reduced to achieve the purpose of weight reduction, or the overall load-bearing capacity can be effectively improved without changing the weight. In addition, carbon fiber reinforced resin matrix composite material is used in non-stress areas. Its density is only one-quarter of that of steel, while the strength of the two is equivalent. After replacement, unnecessary weight can be reduced, and the weight saved can be used to strengthen the core load-bearing components, thereby indirectly improving the overall load-bearing efficiency. By injecting grease into the lubrication cavity 14, the grease is made of thickener and base oil. During the rotation of the drive shaft, the grease will weaken the adhesion of the thickener skeleton to the base oil as the temperature rises, so that some base oil will be released from the skeleton.

[0049] Furthermore, an oil slinger 13 is provided at the top of the outer ring body 1. The oil slinger 13 is located inside the outer ring body 1 in an arc shape. Meanwhile, an array of heat dissipation fins 9 are arranged around the inner ring body 2. The heat dissipation fins 9 are used to conduct the heat in the grease to the inner ring body 2. During the rotation of the inner ring body 2 by the drive shaft, the internal lubricating oil will be thrown into the oil slinger 13 by the action of the heat dissipation fins 9. Wedge-shaped blocks 17 are provided on both sides of the oil slinger 13 at the ball body 11. The wedge-shaped blocks 17 are provided with grooves 10. The grooves 10 are used for the detachable installation of the zirconia carbon fiber composite oil-absorbing layer 15. Oil holes 16 are provided on both sides of the wedge-shaped blocks 17 at the oil slinger 13. One end of the oil hole 16 is connected to the zirconia carbon fiber composite oil-absorbing layer 15.

[0050] The zirconia carbon fiber composite oil-absorbing layer 15 in this device is mainly used to store and slowly release lubricating oil. It adsorbs grease through capillary action and releases the lubricating medium when the ball body 11 rolls. The contact between the zirconia carbon fiber composite oil-absorbing layer 15 and the ball body 11 is usually a flexible contact, that is, the zirconia carbon fiber composite oil-absorbing layer 15 is compressed or locally deformed to provide continuous lubrication. The zirconia carbon fiber composite oil-absorbing layer 15 is soft and has a low elastic modulus. When the ball body 11 squeezes the zirconia carbon fiber composite oil-absorbing layer 15, the zirconia carbon fiber composite oil-absorbing layer 15 itself undergoes elastic deformation, the contact area expands, the contact stress is dispersed, and local stress concentration is avoided.

[0051] When the lubricating oil is thrown to the top of the oil slinger 13 by the heat dissipation fins 9, some of the lubricating oil will be immersed into the zirconia carbon fiber composite oil-absorbing layer 15 by the oil hole 16. When facing sudden working conditions (such as rapid acceleration, heavy load climbing, bearing jamming), the ball body 11 at the top will come into contact with the zirconia carbon fiber composite oil-absorbing layer 15, so that the lubricating oil in the zirconia carbon fiber composite oil-absorbing layer 15 is coated on the outer wall of the ball body 11 and forms an oil film of a certain thickness. In this process, the ball body 11 can be prevented from generating intense heat, which improves the load-bearing capacity of the vehicle in the face of sudden working conditions.

[0052] Meanwhile, the zirconia carbon fiber composite oil-absorbing layer 15 is symmetrically arranged in an array around the oil-throwing groove 13. Therefore, when the grease in the lubrication cavity 14 is consumed to less than half of the bearing's internal space, the frictional contact between the zirconia carbon fiber composite oil-absorbing layer 15 and the ball body 11 can form an oil film of a certain thickness on the surface of the ball body 11. At this time, there is no need to add grease, effectively reducing the frequency of grease maintenance and replacement, making full use of the grease and preventing waste. Furthermore, if the ball body 11 at the top overheats due to a sudden situation, it itself... It will expand, and the groove 10 allows the zirconia carbon fiber composite oil-absorbing layer 15 to be inserted into it, so that the ball body 11 will not be excessively squeezed by the zirconia carbon fiber composite oil-absorbing layer 15 during normal rotation. When the ball body 11 expands, its volume increases, and it will squeeze the zirconia carbon fiber composite oil-absorbing layer 15 during the rolling process. At this time, the lubricating oil in the zirconia carbon fiber composite oil-absorbing layer 15 will be quickly squeezed out and flow, so as to drive some of the heat of the ball body 11 and extend the overall service life of the device.

[0053] For details regarding the above embodiments, please refer to [link / reference]. Figure 4Both the outer ring body 1 and the inner ring body 2 are provided with ball grooves 7 at the ball body 11, and a ball frame 12 is provided between each group of ball bodies 11. The ball grooves 7 ensure that the ball bodies 11 slide on the same horizontal plane between the two, which improves the stability of the oil film. The ball frame 12 makes it easy to evenly separate the ball bodies 11, avoid direct friction between the ball bodies 11, and further ensure the stability of the oil film on the outer wall of each group of ball bodies 11.

[0054] For details regarding the above embodiments, please refer to [link / reference]. Figure 1 Both sides of the lubrication chamber 14 are provided with sealing components 5. The sealing components 5 are snap-fit ​​type. The sealing components 5 mainly prevent large dust and impurities from entering the bearing and can also reduce the leakage of internal lubricating oil during operation. The snap-fit ​​type setting makes it easy for maintenance personnel to disassemble and replace them later.

[0055] For details regarding the above embodiments, please refer to [link / reference]. Figure 5 and Figure 7 The zirconia carbon fiber composite oil-absorbing layer 15 is itself an oil-absorbing material. Its zirconia fiber can be used for a long time at temperatures above 1500℃. After being reinforced by carbon fiber, the material maintains structural stability in the range of -200℃ to 450℃. Furthermore, the oil-absorbing sponge layer inside the material is sealed with fluororubber with a low coefficient of friction. Combined with the elastic deformation of the zirconia frame, it can achieve rapid adsorption and extrusion release of grease at 180℃. The whole structure is suitable for repeated extrusion operations under high temperature and high pressure environments.

[0056] Example 2: Please refer to Figure 3 The high-load lightweight wheel hub bearing assembly shown has an overall structure similar to that of Embodiment 1. Wedge-shaped rings 8 are provided on both sides of the heat dissipation fins 9 on the inner ring body 2. During the rotation of the inner ring body 2 via the drive shaft, the wedge-shaped rings 8 prevent the lubricating oil between the heat dissipation fins 9 from flowing to both sides. This ensures that a large amount of lubricating oil is thrown into the oil slinger 13 during the rotation of the inner ring body 2, thus guaranteeing the lubricating oil supply at the zirconia carbon fiber composite oil-absorbing layer 15. Furthermore, the wedge-shaped ring 8 itself is arc-shaped, with its arc facing inwards towards the heat dissipation fins 9. When there is excessive lubricating oil in the oil hole 16, it flows downwards through the wedge block 17 to the outer surface of the wedge-shaped ring 8. At this time, the excess hot lubricating oil flows through the wedge-shaped ring 8 to the bottom of the ball body 11, further accelerating the formation rate of the oil film at the top of the ball body 11 and effectively reducing the heat generation at the ball body 11.

[0057] Example 3: Please refer to Figure 11The high-load lightweight wheel hub bearing assembly shown is based on Embodiment 2. In this assembly, the heat dissipation fins 9 are symmetrically arranged on the inner ring body 2, and the heat dissipation fins 9 themselves are arranged in an inclined, surrounding manner. The combination of multiple sets of heat dissipation fins 9 creates an inclined gap between them. During the rotation of the inner ring body 2, the inclined heat dissipation fins 9 will throw the lubricating oil in the gap to both sides. At this time, most of the lubricating oil will be discharged to the zirconia carbon fiber composite oil-absorbing layer 15 through the oil hole 16. During this process, even when there is a small amount of grease in the lubrication cavity 14, it is still possible to ensure that a certain thickness of oil film is formed at each set of ball bodies 11 during rotation, so as to make full use of the grease and further reduce the waste of grease.

[0058] In practical operation, the present invention is used by inserting the spline of the vehicle drive shaft into the spline hole 6 on the inner ring body 2, which is connected to the wheel. The outer ring body 1 is fixed on the support frame. During the vehicle's operation, the drive shaft drives the inner ring body 2 to rotate, thereby driving the wheel to rotate. The outer ring body 1 is in a fixed state. At the same time, during the rotation of the inner ring body 2, its heat dissipation fins 9 throw the lubricating oil in the lubrication cavity 14 to the top of the oil slinger 13. At this time, some of the lubricating oil will enter the zirconia carbon fiber composite oil-absorbing layer 15 through the oil hole 16. After long-term driving, when the grease in the lubrication cavity 14 is consumed to less than half of the bearing's internal space, it is difficult to form a stable oil film on the outer wall of the ball body 11 when facing sudden working conditions (such as rapid acceleration, heavy load climbing, bearing jamming).

[0059] During rotation, the ball bearing body 11 comes into contact with and rubs against the zirconia carbon fiber composite oil-absorbing layer 15, causing the lubricating oil in the zirconia carbon fiber composite oil-absorbing layer 15 to be evenly coated on the ball bearing body 11 and form an oil film of a certain thickness. This process prevents the ball bearing body 11 from generating intense heat, improving the vehicle's load-bearing capacity under sudden working conditions. Furthermore, the zirconia carbon fiber composite oil-absorbing layer 15 is located at the top of the outer ring body 1 and is arranged in an array. When the grease is insufficient to provide an oil film for the ball bearing body 11, the frictional contact between the zirconia carbon fiber composite oil-absorbing layer 15 and the ball bearing body 11 can be used to form an oil film of a certain thickness. At this time, there is no need to maintain or add grease, thus making full use of the grease and preventing waste. In addition, when the ball bearing body 11 at the top overheats due to a sudden situation, it will expand. At this time, the lubricating oil in the zirconia carbon fiber composite oil-absorbing layer 15 will be quickly squeezed out and flow, thereby dissipating some of the heat from the ball bearing body 11 and extending the overall service life of the device.

[0060] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A high-load lightweight wheel hub bearing assembly, comprising an outer ring body (1) and an inner ring body (2), wherein the outer ring body (1) is snapped onto the outer wall of the inner ring body (2), and a lubrication cavity (14) is formed between the outer ring body (1) and the inner ring body (2), and a ball body (11) is disposed between the outer ring body (1) and the inner ring body (2), characterized in that: The top of the outer ring body (1) is provided with an oil slinger (13), which is located in the outer ring body (1) in an arc shape. Both sides of the oil slinger (13) are provided with wedge-shaped blocks (17) at the ball body (11). The wedge-shaped block (17) has a zirconia carbon fiber composite oil-absorbing layer (15) located at the ball body (11). Oil holes (16) are located on both sides of the oil slinger (13) on the wedge-shaped block (17), with one end of each oil hole (16) connected to the zirconia carbon fiber composite oil-absorbing layer (15). An array of heat dissipation fins (9) is arranged in a ring around the lubrication cavity (14) on the inner ring body (2). Wedge-shaped rings (8) are located on both sides of the heat dissipation fins (9) on the inner ring body (2). The wedge ring (8) is arc-shaped, with its arc facing inclined towards the inner side of the heat dissipation fins (9). The heat dissipation fins (9) are symmetrically arranged on the inner ring body (2), and the heat dissipation fins (9) themselves are arranged in an inclined, surrounding manner. The wedge block (17) is provided with a groove (10), which is used for the detachable installation of the zirconia carbon fiber composite oil-absorbing layer (15). The inner wall of the oil hole (16) is provided with a smooth surface, and one end of the zirconia carbon fiber composite oil-absorbing layer (15) is inclined downward.

2. The high-load lightweight wheel hub bearing assembly according to claim 1, characterized in that: The outer ring body (1) and the inner ring body (2) are respectively provided with an outer ring flange (3) and an inner ring flange (4), and an array of bolt assemblies for installation are provided on both the outer ring flange (3) and the inner ring flange (4).

3. The high-load lightweight wheel hub bearing assembly according to claim 1, characterized in that: The inner wall of the inner ring body (2) is provided with a spline hole (6), wherein the inner wall of the spline hole (6) is rough.

4. The high-load lightweight wheel hub bearing assembly according to claim 1, characterized in that: Both the outer ring body (1) and the inner ring body (2) are provided with ball grooves (7) at the ball body (11), and a ball frame (12) is provided between each group of ball bodies (11).

5. The high-load lightweight wheel hub bearing assembly according to claim 1, characterized in that: Both sides of the lubrication cavity (14) are provided with sealing components (5), and the sealing components (5) themselves are snap-fit.

6. The high-load lightweight wheel hub bearing assembly according to claim 1, characterized in that: The two ends of the oil slinger (13) are located on the outer ring body (1) and are set with rounded corners.

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