Hub bearing, hub motor assembly and vehicle

Abstract

This application relates to the field of vehicle component technology, specifically disclosing a wheel hub bearing, a wheel hub electric drive assembly, and a vehicle. The wheel hub bearing includes a bearing body; the bearing body includes a first sub-bearing body and a second sub-bearing body, which are connected side-by-side along the axial direction. A first connecting portion is provided on the outer periphery of the first sub-bearing body, and a second connecting portion is provided on the outer periphery of the second sub-bearing body. The first connecting portion and the second connecting portion abut against each other to form a third connecting portion for connecting a planetary carrier. Specifically, by connecting the two sub-bearing bodies side-by-side, installation is facilitated and the overall size can be adjusted as needed. According to different speed ratio requirements, the length ratio of the sub-bearing bodies can be adjusted to achieve miniaturization and lightweight design while maintaining functionality, improving or avoiding the size expansion problem caused by speed ratio changes. Connecting the planetary carrier through the third connecting portion can reduce weight and simplify the assembly process.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, specifically to a wheel hub bearing, a wheel hub electric drive assembly, and a vehicle. Background Technology

[0002] In current mainstream electric drive assembly layout technologies for vehicles, the electric drive assembly is centrally located, with power transmitted to the wheels via driveshafts. However, this process incurs transmission losses and requires additional power distribution devices such as driveshafts and differentials. Therefore, arranging the electric drive assembly within the wheel hub to form a hub-and-spoke electric drive assembly can mitigate or avoid these technical drawbacks.

[0003] However, most current hub electric drive assemblies suffer from problems such as inconvenient hub bearing installation, large size, and heavy weight. Utility Model Content

[0004] This application provides a hub bearing, a hub electric drive assembly, and a vehicle. The hub bearing has a simple structure, small size, and light weight, and can be directly connected to the planetary carrier, simplifying the installation process.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a hub bearing, which includes a bearing body; the bearing body includes a first sub-bearing body and a second sub-bearing body, which are connected side by side along the axial direction; a first connecting portion is provided on the outer periphery of the first sub-bearing body, and a second connecting portion is provided on the outer periphery of the second sub-bearing body, the first connecting portion abutting against the second connecting portion and forming a third connecting portion for connecting the planetary carrier.

[0006] Both the first connecting part and the second connecting part include splines, which mesh with the planetary carrier.

[0007] The first sub-bearing body and the second sub-bearing body are both provided with an axial assembly channel for installing an intermediate shaft; the hub bearing also includes a flange and a sealing cover that connect the bearing body, and the sealing cover connects to the flange and seals the assembly channel.

[0008] The flange extends from the second sub-bearing body away from the first sub-bearing body.

[0009] The flange has connection holes.

[0010] The first sub-bearing body includes a first outer ring and a first inner ring. The first outer ring and the first inner ring are connected and sleeved on the outer periphery of the first inner ring, and a first connecting part is sleeved on the outer periphery surface of the first outer ring. The second sub-bearing body includes a second outer ring and a second inner ring. The second outer ring is connected and sleeved on the outer periphery of the second inner ring, and a second connecting part is sleeved on the outer periphery surface of the second outer ring. The second outer ring abuts against the first outer ring, and the second inner ring abuts against the first inner ring.

[0011] A first channel is formed between the first outer ring and the first inner ring, and a second channel is formed between the second outer ring and the second inner ring. The first channel and the second channel are connected, and each of the first channel and the second channel is provided with a number of movable balls.

[0012] The first channel has a first opening on each side that penetrates the two end faces of the first sub-bearing body, and the second channel has a second opening on each side that penetrates the two end faces of the second sub-bearing body. One of the first openings is connected to the corresponding second opening. The diameter of both the first and second openings is smaller than the diameter of the ball.

[0013] This application also includes a second technical solution, providing a hub electric drive assembly, including a planetary carrier and the aforementioned hub bearing;

[0014] The third connecting part meshes with the internal teeth of the planet carrier.

[0015] This application also includes a third technical solution, providing a vehicle including the aforementioned hub electric drive assembly.

[0016] The beneficial effects of this application are as follows: Unlike existing technologies, the wheel hub bearing, wheel hub electric drive assembly, and vehicle provided in this application include a bearing body; the bearing body includes a first sub-bearing body and a second sub-bearing body, which are connected side-by-side along the axial direction; a first connecting portion is provided on the outer periphery of the first sub-bearing body, and a second connecting portion is provided on the outer periphery of the second sub-bearing body; the first connecting portion and the second connecting portion abut against each other to form a third connecting portion for connecting the planetary carrier. The wheel hub bearing of this application, through the side-by-side connection structure of the two sub-bearing bodies, facilitates installation and allows the overall bearing size to be adjusted as needed. In application, the length ratio of the sub-bearing bodies can be adjusted according to different speed ratio requirements, achieving miniaturization and lightweight design while maintaining functionality, and improving or avoiding the problem of dimensional expansion caused by speed ratio changes. Connecting the planetary carrier through the third connecting portion reduces the amount of fasteners used, thus reducing weight and simplifying the assembly process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a schematic diagram of a wheel hub bearing according to an embodiment of the present application, wherein the wheel hub bearing includes a bearing body;

[0019] Figure 2 yes Figure 1 A schematic diagram of the structure of one embodiment of the bearing body;

[0020] Figure 3 yes Figure 2 A schematic diagram of the AA section of the bearing body.

[0021] Reference numerals: 10. Bearing body; 1. First sub-bearing body; 11. First connecting part; 12. First outer ring; 13. First inner ring; 14. First channel; 15. First opening; 2. Second sub-bearing body; 21. Second connecting part; 22. Second outer ring; 23. Second inner ring; 24. Second channel; 25. Second opening; 26. Flange; 261. Intermediate shaft through hole; 262. Reinforcing rib; 263. Connecting hole; 27. Sealing cover; 3. Third connecting part; 4. Ball; 5. Assembly channel; 6. Mounting screw; 100. Hub bearing. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Please refer to the reference. Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of one embodiment of the hub bearing of this application. Figure 2 yes Figure 1 A schematic diagram of the structure of one embodiment of the bearing body. Figure 3 yes Figure 2 A schematic diagram of the AA cross-section of the bearing body. One aspect of this application provides a hub bearing 100, combined with... Figure 1 and Figure 3 As shown, the hub bearing 100 includes a bearing body 10; the bearing body 10 includes a first sub-bearing body 1 and a second sub-bearing body 2, which are connected side-by-side along the axial direction; a first connecting portion 11 is provided on the outer periphery of the first sub-bearing body 1, and a second connecting portion 21 is provided on the outer periphery of the second sub-bearing body 2; the first connecting portion 11 and the second connecting portion 21 abut against each other to form a third connecting portion 3 for connecting the planetary carrier. The hub bearing 100 of this embodiment, through the side-by-side connection structure of the two sub-bearing bodies 10, facilitates installation and allows the overall bearing size to be adjusted as needed. In application, the length ratio of the sub-bearing bodies 10 can be adjusted according to different speed ratio requirements, achieving miniaturization and lightweight design while maintaining functionality, and improving or avoiding the problem of dimensional expansion caused by speed ratio changes. Connecting the planetary carrier through the third connecting portion 3 reduces the amount of fasteners used, thus reducing weight and simplifying the assembly process.

[0027] Specifically, the hub bearing 100 consists of two axially arranged sub-bearing bodies 10 connected side-by-side, facilitating installation and adjustment. The first sub-bearing body 1 has a first connecting portion 11 on its outer periphery, and the second sub-bearing body 2 has a second connecting portion 21 on its outer periphery. The two connecting portions abut against each other to form a third connecting portion 3, which is used for mechanical connection with the planetary carrier. The contact surfaces of the first connecting portion 11 and the second connecting portion 21 can be fixed using an interference fit or welding process. The shape of the third connecting portion 3 can be adapted to the shape of the planetary carrier to improve connection stability. The sub-bearing bodies 10 can be manufactured using high-strength alloy steel or lightweight composite materials, and precision machining can ensure the fitting accuracy of the connecting portions. In one specific embodiment, the abutting surfaces of the first connecting portion 11 and the second connecting portion 21 can be designed as beveled or stepped surfaces to enhance connection stability. In another specific embodiment, the first connecting portion 11 and the second connecting portion 21 can also be detachably connected using a threaded locking structure or the like, facilitating installation and adjustment, allowing the hub bearing 100 to be adjusted according to changes in load.

[0028] In one embodiment of this application, as Figure 1 and Figure 3 As shown, both the first connecting part 11 and the second connecting part 21 include splines, which mesh with the planetary carrier.

[0029] Specifically, both the first connecting part 11 and the second connecting part 21 are provided with splines, which transmit power through meshing with the planetary carrier. The splines are axially extending tooth-like structures and can be external splines that mesh with the internal tooth structure of the planetary carrier. Furthermore, involute splines or rectangular splines can be used to transmit torque through tooth surface contact. The parameters of the splines, such as the number of teeth, module, and pressure angle, can be adjusted according to the power transmission requirements while maintaining compatibility with the planetary carrier. This connection method creates a rigid power connection between the hub bearing 100 and the planetary reducer, improving or eliminating the need for additional support structures required by traditional bolted connections, reducing the amount of fasteners used, lowering weight, and simplifying the assembly process, thereby achieving miniaturization and lightweight design.

[0030] In use, the spline meshing connection reduces mechanical friction loss because the toothed contact has less contact resistance compared to bolted connections. This structure also eliminates the need for additional brackets, reducing overall weight. The axial positioning characteristics of the spline fit improve power transmission synchronization and reduce vibration and noise. When the planetary reducer's speed ratio changes, different power requirements can be adapted by adjusting the spline parameters without altering the bearing structure, facilitating modular product design. Furthermore, the ease of assembly and disassembly of the spline connection improves maintenance efficiency.

[0031] In one embodiment of this application, both the first sub-bearing body and the second sub-bearing body are provided with an assembly channel along the axial direction, the assembly channel being used to install an intermediate shaft; the hub bearing also includes a flange and a sealing cover connecting the bearing body, the sealing cover connecting the flange and sealing the assembly channel.

[0032] Specifically, both the first sub-bearing body 1 and the second sub-bearing body 2 are provided with an axially extending assembly channel 5, which is used to pass through the intermediate shaft. In other words, the intermediate shaft can be directly embedded into the internal structure of the bearing, avoiding the need for additional brackets or complex connection structures, thereby reducing the overall weight and simplifying the assembly process.

[0033] Furthermore, the flange 26 may also be provided with an intermediate shaft through-hole 261, which communicates with the assembly channel 5, allowing the intermediate shaft to pass through the through-hole 261 to connect with other external structures or expand the space for accommodating the intermediate shaft. The structure of the assembly channel 5 allows the intermediate shaft to move axially or be fixedly connected within the bearing. The intermediate shaft through-hole 261 on the flange 26, after communicating with the assembly channel 5, enables directional flow of the lubricating medium or integrated connection with other systems. For example, an oil-cooling solution can be used instead of a grease-lubricating solution, thereby reducing mechanical friction loss. This design also allows for adjustment of the channel size according to the specifications of the intermediate shaft, maintaining the compactness of the bearing structure while improving functional adaptability, thereby improving transmission efficiency and extending service life.

[0034] The sealing cover 27 connects to the flange 26 and seals the assembly channel 5. Besides improving or preventing leakage of cooling lubricating oil or intrusion of contaminants, it also reduces frictional mechanical wear of the wheel hub bearing 10 by replacing the traditional dynamic seal with a static seal, extending its service life and improving transmission efficiency. The sealing cover 27 can be installed via threaded connection, snap-fit ​​connection, or interference fit.

[0035] In one embodiment of this application, the flange 26 extends from the second sub-bearing body 2 away from the first sub-bearing body 1.

[0036] Specifically, the flange 26 can be integrally formed with the second sub-bearing body 2 to simplify the process and reduce costs. Of course, in another embodiment, the flange 26 can also be fitted onto the second sub-bearing body 2 to facilitate installation and disassembly, and to facilitate later maintenance.

[0037] In one embodiment of this application, the flange 26 is provided with a connection hole 263.

[0038] Specifically, the flange 26 can be used to connect other components, such as brake discs or wheel rims. The connection hole 263 is also provided with mounting screws 6, which can be passed through the connection hole 263 to fix the flange 26 to components such as brake discs and wheel rims.

[0039] Furthermore, please continue to combine Figure 2 and Figure 3 The flange 26 is also provided with a reinforcing rib 262, which surrounds the intermediate shaft through hole 261 and extends axially to enhance the structural strength of the flange 26.

[0040] The reinforcing ribs 262 can be arranged in a ring-shaped structure around the intermediate shaft through hole 261, and the material can be a metal material integrally formed with the flange 26 or a reinforcing component fixed by welding.

[0041] Furthermore, by providing axially extending reinforcing ribs 262 on the flange 26, the structural stability of the flange 26 under axial loads can be effectively improved, reducing the risk of deformation due to stress concentration. In one embodiment of this application, as... Figure 3 As shown, the first sub-bearing body 1 includes a first outer ring 12 and a first inner ring 13. The first outer ring 12 is connected to and sleeved on the outer periphery of the first inner ring 13. The first connecting part 11 is sleeved on the outer periphery surface of the first outer ring 12. The second sub-bearing body 2 includes a second outer ring 22 and a second inner ring 23. The second outer ring 22 is connected to and sleeved on the outer periphery of the second inner ring 23. The second connecting part 21 is sleeved on the outer periphery surface of the second outer ring 22. The second outer ring 22 abuts against the first outer ring 12, and the second inner ring 23 abuts against the first inner ring 13.

[0042] Specifically, the first outer ring 12 and the first inner ring 13 form the main structure of the first sub-bearing body 1, and the fixed connection between the first outer ring 12 and the first inner ring 13 can be achieved by welding, riveting, or integral molding. By setting the first outer ring 12 and the first inner ring 13 as a fitted structure, the overall mechanical stability of the first sub-bearing body 1 can be enhanced, and relative displacement between components can be avoided. The first connecting part 11 is located on the outer peripheral surface of the first outer ring 12, which can effectively distribute the force and reduce the risk of wear caused by local stress concentration. This structural design can reduce the additional weight brought by traditional bolt connections, while making the power transmission path more direct and reducing mechanical friction loss. When used for planetary reducer connection, the first connecting part 11 can form a rigid transmission with the planet carrier, avoiding energy loss caused by flexible connection and improving the overall transmission efficiency.

[0043] The second sub-bearing body 2 includes a second outer ring 22 and a second inner ring 23. The second outer ring 22 and the second inner ring 23 can be fixedly connected by welding, riveting, or integral molding. The outer periphery of the second outer ring 22 is provided with a spline structure for power transmission. The fitted structure design of the second outer ring 22 and the second inner ring 23 allows the bearing to have a more uniform stress distribution when subjected to radial and axial loads, thereby reducing the risk of fatigue damage caused by contact stress concentration. The second outer ring 22 abuts against the first outer ring 12 and the second inner ring 23 abuts against the first inner ring 13, so that the second sub-bearing body 2 can be tightly connected to the first sub-bearing body 1 side by side. At the same time, the second connecting part 21 abuts against the first connecting part 11 and together forms the third connecting part 3. The planetary carrier is then connected through the third connecting part 3, which reduces the number of parts and the assembly complexity, thereby simplifying the structure, reducing weight, and achieving miniaturization and lightweight design.

[0044] In one embodiment of this application, a first channel 14 is formed between the first outer ring 12 and the first inner ring 13, and a second channel 24 is formed between the second outer ring 22 and the second inner ring 23. The first channel 14 and the second channel 24 are connected, and a plurality of movable balls 4 are provided in both the first channel 14 and the second channel 24.

[0045] Specifically, the first channel 14 and the second channel 24 can be annular or semi-annular structures, and the connecting part allows for the circulation of cooling lubricating oil. The balls 4 can be made of metal or ceramic, and their number can be adjusted according to the load requirements. The cross-sectional shape of the channel can be circular or elliptical, and the arrangement of the balls 4 can be single-row or multi-row. The balls 4 can roll within the first channel 14 or the second channel 24 through direct contact.

[0046] In use, by setting up a connected channel structure and configuring movable balls 4, the circulating flow of cooling lubricating oil can be achieved, reducing frictional resistance and improving heat dissipation efficiency. The rolling contact of the balls 4 effectively reduces mechanical losses during rotation. This structure can also optimize power transmission efficiency and reduce the overall weight of the hub bearing 100 without adding extra components, while maintaining good rotational accuracy and load-bearing capacity.

[0047] In one embodiment of this application, the first channel 14 is provided with a first opening 15 penetrating the two end faces of the first sub-bearing body 1 on both sides, and the second channel 24 is provided with a second opening 25 penetrating the two end faces of the second sub-bearing body 2 on both sides, wherein one of the first openings 15 is connected to the corresponding second opening 25; the diameter of both the first opening 15 and the second opening 25 is smaller than the diameter of the ball 4.

[0048] Specifically, the first opening 15 and the corresponding second opening 25 can form a connecting path. Since the opening diameter is designed to be smaller than the diameter of the ball 4, this structure can achieve specific functions by adjusting the opening position and size. For example, by controlling the opening connection relationship to form a specific flow channel, the specific flow channel only allows the flow of media such as cooling lubricating oil, or by using the aperture restriction to guide the movement of the ball 4.

[0049] Furthermore, by setting an opening structure smaller than the diameter of the ball bearing 4, the flow path of the cooling lubricating oil can be effectively controlled, reducing mechanical friction loss. The interconnected opening design can form a directional cooling channel, improving the internal heat dissipation efficiency of the bearing. The aperture restriction can prevent the ball bearing 4 from getting stuck during movement or avoid the ball bearing 4 of the two sub-bearing bodies 10 from concentrating in the first channel 14 or the second channel 24 during movement, causing imbalance on both sides. At the same time, optimizing the opening layout can reduce the weight of the structural components. This design, combined with an oil cooling solution, can achieve more efficient heat dissipation performance, ultimately improving the transmission efficiency and service life of the hub bearing 100. The cooling lubricating oil can be evenly distributed throughout the entire bearing working area, extending its service life.

[0050] In the above embodiment, the assembly channel 5 is located inside the first inner ring 13 and the second inner ring 23, and is arranged at intervals with the first channel 14 and the second channel 24, so as to reduce the influence of the intermediate shaft on the internal structure of the hub bearing 10.

[0051] In another aspect, this application also provides a hub electric drive assembly, which includes a planetary reducer and the aforementioned hub bearing 100. Specifically, the planetary reducer includes a planet carrier, and the hub bearing 100 is connected to the planetary reducer by meshing with the internal teeth of the planet carrier via a third connecting portion 3. Since this hub electric drive assembly includes the hub bearing 100 described in the above embodiment, it also has the beneficial effects of the aforementioned hub bearing 100, which will not be elaborated further here.

[0052] Furthermore, the cooling lubricating oil of the planetary reducer can be shared with the hub bearing 100. The rotation of the planetary reducer agitates the oil, causing it to flow into the hub bearing 100. Since the cooling lubricating oil is always inside the reducer, although there is no cooling measure, it can meet the operating requirements through natural cooling by the cooling lubricating oil.

[0053] Furthermore, by providing oil injection holes on the hub electric drive assembly, cooling lubricating oil can enter the first opening 15 of the hub bearing 100, and the rotation of the hub bearing 100 itself can ensure that the cooling lubricating oil can fully lubricate the hub bearing 100. The oil is circulated and cooled through the oil pump, oil cooler, oil sump, etc. provided in the hub electric drive assembly.

[0054] In another aspect, this application also provides a vehicle that includes the aforementioned hub electric drive assembly. Specifically, since the vehicle includes the hub electric drive assembly described in the above embodiments, it also possesses the beneficial effects of the aforementioned hub electric drive assembly, which will not be elaborated further here.

[0055] It should be noted that the terms "horizontal" and "vertical" do not imply that the components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. Similarly, the terms "parallel" and "perpendicular" do not imply that the components are absolutely parallel or perpendicular, but rather that they can have a certain angular deviation. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted. In addition, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships that are commonly used when the product of this application is in use. They are only for the purpose of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] It is understood that the term "multiple" in this document means at least two, such as two, three, etc., unless otherwise specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0057] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A wheel hub bearing, characterized in that include: The bearing body (10) includes a first sub-bearing body (1) and a second sub-bearing body (2), which are connected side by side along the axial direction. The first sub-bearing body (1) has a first connecting part (11) on its outer periphery, and the second sub-bearing body (2) has a second connecting part (21) on its outer periphery. The first connecting part (11) abuts against the second connecting part (21) and forms a third connecting part (3) for connecting the planetary carrier.

2. The hub bearing according to claim 1, characterized in that, Both the first connecting part (11) and the second connecting part (21) include splines, which engage with the planetary carrier.

3. The hub bearing according to claim 1, characterized in that, Both the first sub-bearing body (1) and the second sub-bearing body (2) are provided with an axial assembly channel (5), which is used to install the intermediate shaft; The hub bearing also includes a flange (26) and a sealing cap (27) for connecting the bearing body (10); The sealing cap (27) connects to the flange (26) and seals the assembly channel (5).

4. The hub bearing according to claim 3, characterized in that, The flange (26) is formed by extending the second sub-bearing body (2) away from the first sub-bearing body (1).

5. The hub bearing according to claim 3, characterized in that, The flange (26) is provided with a connection hole (263).

6. The hub bearing according to claim 1, characterized in that, The first sub-bearing body (1) includes a first outer ring (12) and a first inner ring (13). The first outer ring (12) is connected to and sleeved on the outer periphery of the first inner ring (13). The first connecting part (11) is disposed on the outer periphery surface of the first outer ring (12). The second sub-bearing body (2) includes a second outer ring (22) and a second inner ring (23). The second outer ring (22) is connected to and sleeved on the outer periphery of the second inner ring (23). The second connecting part (21) is disposed on the outer periphery surface of the second outer ring (22). The second outer ring (22) abuts against the first outer ring (12), and the second inner ring (23) abuts against the first inner ring (13).

7. The hub bearing according to claim 6, characterized in that, A first channel (14) is formed between the first outer ring (12) and the first inner ring (13), and a second channel (24) is formed between the second outer ring (22) and the second inner ring (23). The first channel (14) and the second channel (24) are connected, and a plurality of movable balls (4) are provided in both the first channel (14) and the second channel (24).

8. The hub bearing according to claim 7, characterized in that, The first channel (14) has a first opening (15) on each side that penetrates the two end faces of the first sub-bearing body (1), and the second channel (24) has a second opening (25) on each side that penetrates the two end faces of the second sub-bearing body (2), wherein one of the first openings (15) is connected to the corresponding second opening (25). The diameters of the first opening (15) and the second opening (25) are both smaller than the diameter of the ball (4).

9. A hub electric drive assembly, characterized in that, Includes a planetary carrier and a hub bearing as described in any one of claims 1-8; The third connecting part (3) engages with the internal teeth of the planet carrier.

10. A vehicle characterized by comprising: include: The hub electric drive assembly as described in claim 9.

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