Hub bearings, wheel-side devices, and vehicles

Abstract

A hub bearing (100), a wheel-side device (1000), and a vehicle (10000) are provided. The hub bearing includes a hub flange (30) that rotates in conjunction with a tire (3000), a rotating member (20), and a bearing outer ring (10) sleeved on the hub flange. The rotating member is positioned between the hub flange and the bearing outer ring to allow the hub flange to rotate relative to the bearing outer ring. The bearing outer ring is provided with a first channel (11), and a first air port (12) and a second air port (13) communicating with the first channel. The first air port communicates with an air source (2000). The second air port communicates with the tire through a rotating air chamber (220) sleeved on the bearing outer ring.

Description

Technical Field

[0001] Cross - reference to Related Applications This application is based on Chinese Patent Application No. 202321006721.4, titled "HUB BEARING, WHEEL SIDE APPARATUS, AND VEHICLE", filed on April 28, 2023, which is incorporated herein by reference in its entirety, and claims the priority of the above - mentioned Chinese patent application.

[0002] This application belongs to the technical field of hub bearings, and more particularly, relates to hub bearings, wheel - side devices, and vehicles having the same.

Background Art

[0003] In related technologies, some vehicles are provided with an active inflation / deflation system. To reduce tire wear and rolling resistance, the tire air pressure is adjusted. However, the rotary seal assembly in the active inflation / deflation system usually affects the service life of the hub bearing disposed within the vehicle and further affects the safety of vehicle operation.

Summary of the Invention

[0004] Therefore, this application provides a hub bearing. The use of the hub bearing is not affected by the rotary seal assembly in the active inflation / deflation system.

[0005] A hub bearing according to a first aspect of this application includes a hub flange configured to rotate in conjunction with a tire, a rotating member, and a bearing outer ring, wherein the bearing outer ring is sleeved on the hub flange, and the rotating member is positioned between the hub flange and the bearing outer ring to allow the hub flange to rotate relative to the bearing outer ring, and the bearing outer ring is provided with a first channel, and a first air port and a second air port communicating with the first channel, wherein the first air port is configured to communicate with an air source, and the second air port can communicate with a tire through a rotating air chamber sleeved on the bearing outer ring.

[0006] In the hub bearing according to the first aspect of this application, the outer ring of the bearing is provided with a first channel, and a first air port and a second air port communicating with the first channel, the second air port being able to communicate with the tire through a rotatable air chamber sleeved on the outer ring of the bearing, thereby facilitating the arrangement of the seal assembly forming the rotatable air chamber. In addition, the hub bearing does not affect the heat dissipation performance of the seal assembly, and as a result the service life of the seal assembly is extended. Furthermore, the hub bearing is not affected by the seal assembly in the active expansion / contraction system during use, and as a result the safety of the vehicle's operation is not affected.

[0007] Optionally, the first air vent is a through hole penetrating the outer wall of the bearing outer ring, and / or the second air vent is a through hole penetrating the outer wall of the bearing outer ring.

[0008] Optionally, the direction of the airflow passing through the first air inlet is perpendicular to the axial direction of the bearing outer ring, and / or the direction of the airflow passing through the second air inlet is perpendicular to the axial direction of the bearing outer ring.

[0009] Optionally, the first channel extends along the axial direction of the outer ring of the bearing.

[0010] Optionally, the outer bearing ring further includes a blocking portion, which is located within the first channel and positioned on one side of the second air inlet, farther from the first air inlet, blocking one end of the length of the first channel.

[0011] Optionally, the outer ring of the bearing is provided with a boss that extends outward along the radial direction of the outer ring, and the boss is cylindrical in shape to communicate with the first air port.

[0012] Optionally, at least a portion of the boss is provided with a female thread configured to connect in a threaded manner to a first connecting pipe, the first connecting pipe being configured to connect a first air inlet to an air source.

[0013] Optionally, a friction-reducing agent is provided on at least a portion of the outer wall of the bearing outer ring.

[0014] Optionally, the hub flange includes a flange plate, the flange plate having a via hole through which a second connecting pipe passes, and the second connecting pipe is configured to enable communication between a rotating air chamber and a tire.

[0015] Optionally, the flange plate is provided with multiple fixing holes configured to secure the flange plate and the rotary seal assembly, and the rotary seal assembly is provided with a rotary air chamber.

[0016] Optionally, multiple mounting holes are located on the same circumference.

[0017] A wheel-side device according to a second aspect of this application includes a rotary seal assembly and a hub bearing according to a first aspect of this application. The rotary seal assembly is provided with a rotary air chamber. The rotary seal assembly is sleeved on the outer ring of the bearing and fixed to the hub flange so as to rotate in conjunction with the hub flange.

[0018] Optionally, the rotary seal assembly includes a seal assembly and a rotary bracket. The rotary bracket is fixed to the hub flange. The seal assembly is fixed to the rotary bracket. The seal assembly is sleeved onto the bearing outer ring and rotatably contacts the bearing outer ring. Along the axial direction of the bearing outer ring, both sides of the seal assembly separately abut against the outer wall of the bearing outer ring to form a rotary air chamber.

[0019] Optionally, the thickness of the portion of the seal assembly that rotatably contacts the outer ring of the bearing ranges from 0.5 mm to 1.5 mm.

[0020] A vehicle according to a third aspect of this application includes an air source, a tire, and a wheel-side device according to a second aspect of this application. The air source is configured to be positioned on the vehicle body. The air source is configured to selectively communicate with a first air inlet. A rotary seal assembly is configured to selectively communicate with the tire.

[0021] Further aspects and advantages of this application are described in part below, will become apparent from this description, or may be learned through practice of this application.

[0022] The above and / or further aspects and advantages of this application will become apparent and readily apparent from describing the embodiments with reference to the following drawings. [Brief explanation of the drawing]

[0023] [Figure 1] Figure 1 is a schematic diagram of the structure of a hub bearing according to one embodiment of this application. [Figure 2] Figure 2 shows a schematic diagram of the structure of a hub bearing according to one embodiment of this application. [Figure 3] Figure 3 shows a schematic diagram of the structure of a hub bearing according to one embodiment of this application. [Figure 4] This is a cross-sectional view of Figure 2 along AA. [Figure 5] This is a magnified view of part A in Figure 4. [Figure 6] It is a partially enlarged view of B in FIG. 4. [Figure 7] It is a schematic diagram 1 of the structure of a wheel-side device according to an embodiment of the present application. [Figure 8] It is a schematic diagram 2 of the structure of a wheel-side device according to an embodiment of the present application. [Figure 9] It is a schematic diagram of the structure of a vehicle according to an embodiment of the present application.

Embodiments for Carrying out the Invention

[0024] Embodiments of the present application are described in detail below, and examples thereof are shown in the accompanying drawings. Throughout the drawings, the same or similar reference numerals indicate the same or similar elements, or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are examples and are intended to clarify the present application and should not be construed as a limitation to the present application.

[0025] The following disclosure provides many different embodiments or examples for achieving various structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, the components and arrangements are merely examples and are not intended to limit the present application. In addition, in the present application, numbers and / or letters are repeatedly referred to in various examples. This repetition is for the sake of brevity and clarity and does not itself indicate the relationship between the various embodiments and / or arrangements being discussed. In addition, the present application provides various examples of specific processes and materials, but those skilled in the art will be aware of the applicability of other processes and / or the use of other materials.

[0026] A hub bearing 100 according to an embodiment of the present application will be described below with reference to FIGS. 1 to 8.

[0027] It should be noted that the hub bearing 100 provided in this embodiment of the present application may be applied to a vehicle 10000. The hub bearing 100 is connected to a transmission shaft of the vehicle 10000 in a transmission manner and transmits the rotation of the transmission shaft to the wheels. The hub bearing 100 can cooperate with a rotary seal assembly 200 to inflate and deflate the tires 3000 of the vehicle 10000.

[0028] As shown in Figures 1 and 4, the hub bearing 100 includes a hub flange 30, a rotating member 20, and a bearing outer ring 10. The hub flange 30 is configured to rotate in synchronization with the tire 3000. The bearing outer ring 10 is sleeved onto the hub flange 30. The rotating member 20 is positioned between the hub flange 30 and the bearing outer ring 10 to allow the hub flange 30 to rotate relative to the bearing outer ring 10. The bearing outer ring 10 is provided with a first channel 11, and a first air port 12 and a second air port 13 communicating with the first channel 11. The first air port 12 is configured to communicate with an air source 2000 so that the second air port 13 can communicate with the tire 3000 through a rotating air chamber 220 sleeved onto the bearing outer ring 10.

[0029] It can be understood that the hub flange 30 rotates in synchronization with the tire 3000. The bearing outer ring 10 is fixed to the vehicle body 4000. An air source 2000 is located on the vehicle body 4000. The air source 2000 communicates with a first air port 12. A second air port 13 communicates with the tire 3000 through a rotating air chamber 220. When the tire 3000 is inflated, the gas in the air source 2000 enters the first channel 11 through the first air port 12, then enters the rotating air chamber 220 through the second air port 13, and finally enters the chamber of the tire 3000. When the tire 3000 is deflated, a deflation valve can be located on the air path between the air source 2000 and the first air port 12. The gas inside the tire 3000 passes through the rotating air chamber 220, then enters the first channel 11 through the second air port 13, exits through the first air port 12, and is released into the atmosphere through the contraction valve, thereby causing the tire 3000 to contract.

[0030] In related technologies, a seal assembly is positioned between the outer and inner rings of the bearing to form a rotating air chamber, and channels are provided in both the inner and outer rings to communicate with the air source 2000 and the tire 3000. As a result, the bearing structure is complex, and furthermore, the seal assembly forming the rotating air chamber is positioned between the inner and outer rings of the bearing. The following problems exist: Firstly, it is difficult to position the seal assembly due to space constraints; secondly, the seal assembly generates heat due to rotational friction, and the structure does not help in heat dissipation of the seal assembly; thirdly, the seal assembly is a component that wears quickly, and when the seal assembly generates heat due to friction, it wears more easily, and the heat is not easily dissipated. The seal assembly is located inside the bearing and is not easily replaced. If the bearing is replaced, the service life of the bearing is significantly shortened. If bearings are not replaced in time, a worn seal assembly may be present between the outer and inner bearing rings, potentially interfering with the relative motion of the inner bearing ring, the rotating member, and the outer bearing ring. In this way, the safety of the operation of vehicle 10000 is affected.

[0031] However, in this application, the bearing outer ring 10 is provided with a first channel 11, as well as a first air port 12 and a second air port 13 communicating with the first channel 11. Therefore, the structure is simple, and the air path channel through which the first air port 12 communicates with the air source 2000 is conveniently located. In addition, the second air port 13 can communicate with the tire 3000 through a rotatable air chamber 220 sleeved on the bearing outer ring 10. The seal assembly 210 forming the rotatable air chamber 220 is located on the outside of the entire hub bearing 100. The seal assembly 210 is easily positioned and has good heat dissipation. Wear of the seal assembly 210 caused by heat generated by friction is reduced. In addition, after the seal assembly 210 wears out, it is only necessary to replace the seal assembly 210, without shortening the service life of the hub bearing 100 or interfering with the operation of the hub bearing 100. Therefore, situations in which the safe operation of the vehicle 10000 is affected due to damage to the seal assembly 210 are avoided, and thus the seal assembly can be more easily applied to the vehicle 10000 in mass production.

[0032] The hub bearing 100 may be a third-generation bearing comprising a hub flange 30, a rotating member 20, and a bearing outer ring 10. The rotating member 20 includes a rotating member body 21 and a rotating member fixing frame 22. The rotating member body 21 may be spherical, cylindrical, or the like. The rotating member fixing member 22 is positioned between the hub flange 30 and the bearing outer ring 10 and is fixed by a small inner ring 40. The hub flange 30 is provided with a flange body 31 and a flange plate 32. The flange body 31 is provided with a flange central hole 311. The flange central hole 311 of the drive wheel is provided with splines to facilitate connection to a transmission shaft in a transmission configuration. The flange plate 32 is provided with a plurality of fixing columns 323 to be fixed to a brake disc, wheel rim, etc. The brake disc can be sleeved on the plurality of fixing columns 323 and fixed using brake disc fixing holes 324 located on the flange plate 32.

[0033] In some embodiments of this application, as shown in Figure 4, the first air port 12 is a through-hole penetrating the outer wall of the bearing outer ring 10, and / or the second air port 13 is a through-hole penetrating the bearing outer ring 10. In this way, the outer wall of the bearing outer ring 10 is provided with through-holes communicating with the first channel 11 for accommodating the first air port 12 and the second air port 13. In addition, in this way, a connecting pipe between the first air port 12 and the air source 2000 can be positioned radially on the outside of the bearing outer ring 10. The second air port 13 conveniently communicates with a rotatable air chamber 220 sleeved on the bearing outer ring 10 so that the wheel-side device 1000 of this application can be more conveniently positioned.

[0034] In some embodiments of this application, as shown in Figure 4, the direction of the airflow passing through the first air inlet 12 is perpendicular to the axial direction of the bearing outer ring 10, and / or the direction of the airflow passing through the second air inlet 13 is perpendicular to the axial direction of the bearing outer ring 10.

[0035] It can be understood that the direction of the airflow passing through the first air port 12 is perpendicular to the axial direction of the bearing outer ring 10. In other words, the tube forming the first air port 12 is perpendicular to the axial direction of the bearing outer ring 10, thereby facilitating the placement of the first air port 12 and reducing air path resistance to some extent. The direction of the airflow passing through the second air port 13 is perpendicular to the axial direction of the bearing outer ring 10. In other words, the tube forming the second air port 13 is perpendicular to the axial direction of the bearing outer ring 10, thereby facilitating the placement of the second air port 13 and reducing air path resistance to some extent. It can be understood that the airflow passing through the first air port 12 may be perpendicular to the axial direction of the bearing outer ring 10, or the airflow passing through the second air port 13 may be perpendicular to the axial direction of the bearing outer ring 10, or both the airflow passing through the first air port 12 and the airflow passing through the second air port 13 may be perpendicular to the axial direction of the bearing outer ring 10.

[0036] In some embodiments of this application, as shown in Figure 4, the first channel 11 extends along the axial direction of the bearing outer ring 10. In this way, the size of the bearing outer ring in the radial direction can be reduced, thereby reducing the size of the hub bearing 100 in the radial direction and promoting miniaturization of the hub bearing 100.

[0037] In some embodiments of this application, as shown in Figures 4 and 6, the bearing outer ring 10 further includes a blocking portion 14. The blocking portion 14 is located within the first channel 11 and is positioned on the side of the second air port 13, farther from the first air port 12, blocking one end of the length of the first channel 11.

[0038] The end face of the bearing outer ring 10 may be provided with a first channel 11 extending along the axial direction of the bearing outer ring 10, and the blocking portion 14 may be positioned on one side of the second air port 13, farther from the first air port 12, to block one end of the first channel 11, i.e., block the process hole, so that gas can enter the first channel 11 from the first air port 12 and exit from the second air port 13. It should be noted that the blocking portion 14 may be a steel ball or the like, and should be stationarily fitted into the first channel 11 by press-fitting, thereby achieving a better sealing effect after blocking.

[0039] In some embodiments of this application, as shown in Figures 3 and 4, the outer bearing ring 10 is provided with a boss 15 extending radially outward. The boss 15 is cylindrical in order to communicate with a first air port 12. The outer bearing ring 10 is provided with a boss 15 extending radially outward, and the cylindrical boss 15 communicates with the first air port 12, thereby facilitating the connection between the first connection channel, which will be described later, and the first air port 12.

[0040] In some embodiments of this application, as shown in Figures 4 and 5, at least a portion of the boss 15 is provided with a female thread 151 configured to be screw-connected to a first connecting tube. The first connecting tube is configured to connect a first air port 12 to an air source 2000. The first connecting tube is screw-connected to the boss 15 so that it can be quickly and detachably connected to the boss 15. It should be noted that the first connecting tube may be provided with a quick connector. The quick connector is screw-connected to the boss 15 and has a good sealing effect. The outer bearing ring 10 may further be provided with a connecting portion 17 that projects radially outward, thereby helping to secure the outer bearing ring 10 to a steering knuckle or the like.

[0041] In some embodiments of this application, as shown in Figure 4, at least a portion of the outer wall of the bearing outer ring 10 is coated with a friction reducer 16, such as chromium oxide. That is, at least the rotating friction surface of the bearing outer ring 10 is hardened, resulting in the rotating friction surface having high hardness, wear resistance, and high temperature resistance. In addition, rotational resistance is reduced, resulting in the hub bearing 100 and seal assembly 210 having a long service life and better stability.

[0042] In some embodiments of this application, as shown in Figures 1 and 2, the hub flange 30 includes a flange plate 32. The flange plate 32 is provided with a via hole 321 through which a second connecting pipe passes. The second connecting pipe is configured to enable communication between a rotary air chamber 220 and a tire 3000. It should be noted that the hub flange 30 further includes a flange body 31. The flange body 31 is fixed to the flange plate 32. The hub bearing 100 can be applied to drive wheels and non-drive wheels. In the case of a hub bearing 100 applied to a drive wheel, it can be understood that the flange body 31 is further provided with a flange central hole having a spline. The flange body 31 is configured to connect to a transmission shaft through the flange central hole in a transmission manner.

[0043] A via hole 321 is provided in the flange plate 32, and a second connecting pipe, configured to enable communication between the rotary air chamber 220 and the tire 3000, can pass through the via hole 321, thereby increasing the stability of the second connecting pipe and further promoting miniaturization of the rotary seal assembly 200.

[0044] In some embodiments of this application, as shown in Figure 2, the flange plate 32 is provided with a plurality of fixing holes 322 configured to fix the flange plate 32 to the rotary seal assembly 200. The rotary seal assembly 200 is provided with a rotary air chamber 220.

[0045] The flange plate 32 is provided with multiple fixing holes 322, which help to fix the rotary seal assembly 200 to the flange plate 32.

[0046] In some embodiments of this application, the multiple fixing holes 322 are located on the same circumference.

[0047] The multiple fixing holes 322 are located on the same circumference, thereby increasing the reliability of fixing the rotary seal assembly 200 to the flange plate 32 and simplifying the design of the rotary seal assembly 200 and the flange plate 32.

[0048] In a wheel-side device 1000 according to one embodiment of a second aspect of this application, as shown in Figures 7 and 8, the wheel-side device 1000 includes a hub bearing 100 and a rotary seal assembly 200. The hub bearing 100 is a hub bearing 100 according to one embodiment of a first aspect of this application. The rotary seal assembly 200 is provided with a rotary air chamber 220. The rotary seal assembly 200 is sleeved on the bearing outer ring 10 and fixed to the hub flange 30 so as to rotate in synchronization with the hub flange 30.

[0049] This invention includes a hub bearing 100 according to an embodiment of the first aspect of this application, in which a rotating seal assembly 200 can be sleeved on the outer ring 10 of the bearing. When the rotating seal assembly 200 rotates in synchronization with the hub flange 30, the heat generated by friction between the rotating seal assembly 200 and the outer ring 10 of the bearing is easily dissipated. Wear of the rotating seal assembly 200 can be reduced. In addition, after the rotating seal assembly 200 has worn out, it is only necessary to replace the rotating seal assembly 200, without shortening the service life of the hub bearing 100 or interfering with the operation of the hub bearing 100. Thus, a situation in which the safe operation of the vehicle 10000 is affected due to damage to the rotating seal assembly 200 is avoided.

[0050] In some embodiments of this application, as shown in Figure 8, the rotary seal assembly 200 includes a seal assembly 210 and a rotary bracket 230. The rotary bracket 230 is fixed to the hub flange 30. The seal assembly 210 is fixed to the rotary bracket 230. The seal assembly 210 is sleeved on the bearing outer ring 10 and rotatably contacts the bearing outer ring 10. Along the axial direction of the bearing outer ring 10, both sides of the seal assembly 210 are located on either side of the second air port 13, and both abut against the outer wall of the bearing outer ring 10 to form a rotary air chamber 220.

[0051] It can be understood that the seal assembly 210 may be a pair of sealing rings. Along the axial direction of the bearing outer ring 10, one of the sealing rings is located on one side of the second air port 13, and the other sealing ring is located on the other side of the second air port 13. Both sealing rings abut against the outer wall of the bearing outer ring 10 to form a rotating air chamber 220, thereby facilitating communication between the second air port 13 and the rotating air chamber 220. The rotating bracket 230 is fixed to the hub flange 30. Specifically, the rotating bracket 230 is detachably connected to the hub flange 30 through fixing holes 322 on the flange plate 32. The seal assembly 210 is fixed to the rotating bracket 230. When the hub flange 30 rotates, the rotating bracket 230 is driven to rotate, thereby driving the seal assembly 210 to rotate relative to the bearing outer ring 10. In addition, when the seal assembly 210 wears out, only the seal assembly 210 needs to be replaced. It should be noted that the rotating bracket 230 is provided with a rotating channel 231 that communicates with the rotating air chamber 220. A second connecting pipe through which the rotating air chamber 220 communicates with the tire 3000 can communicate with the rotating channel 231 and, after passing through a via hole 321 located in the flange plate 32, can communicate with the tire 3000.

[0052] In some embodiments of this application, as shown in Figure 8, the thickness of the portion of the seal assembly 210 that rotatably contacts the bearing outer ring 10 ranges from 0.5 mm to 1.5 mm.

[0053] The thickness of the portion of the seal assembly 210 that rotatably contacts the bearing outer ring 10 is designed to range from 0.5 mm to 1.5 mm so as to ensure sealing performance and at the same time ensure the service life of the seal assembly.

[0054] As shown in Figure 9, a vehicle 10000 according to one embodiment of the third aspect of this application includes a wheel-side device 1000 according to an embodiment of the second aspect of this application and has all the beneficial effects of the wheel-side device. Further details are not described again herein.

[0055] In the description of this application, the directional or positional relationships indicated by terms such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “top,” “bottom,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” and “circumferential” should be understood to be based on the directional or positional relationships shown in the accompanying drawings. This is solely for the purpose of facilitating and simplifying the description of this application and is not intended to indicate or imply that the devices or elements referred to must have a particular orientation and be configured and operated in a particular orientation. Therefore, these terms should not be construed as limiting this application.

[0056] Furthermore, the terms “first” and “second” are used solely for descriptive purposes and should not be interpreted as indicating or implying relative importance, or implicitly indicating the number of technical features described. Therefore, features defined using “first” or “second” may explicitly or implicitly include one or more such features.

[0057] In this application, unless explicitly stated and defined otherwise, terms such as “attach,” “interconnect,” “connect,” and “fix” should be interpreted in their broadest sense. For example, elements may be fixed, detachably connected, or integrally connected; they may be mechanically connected, electrically connected, or in communication; they may be directly connected, indirectly connected through an intermediate medium, communicate internally between two elements, or interact with each other. To those skilled in the art, the specific meanings of the above terms in this application can be interpreted according to the specific conditions.

[0058] In this application, unless otherwise explicitly stated and defined, a description that the first feature is located "above" or "below" the second feature may indicate direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Furthermore, a description that the first feature is located "above," "through over," or "on top of" the second feature may indicate that the first feature is located directly above or diagonally above the second feature, or simply that the first feature is located at a higher horizontal level than the second feature. A description that the first feature is located "below," "directly below," or "below" the second feature may indicate that the first feature is located just below or diagonally below the second feature, or simply that the first feature is located at a lower horizontal level than the second feature.

[0059] In this specification, the referential terms such as “one embodiment,” “several embodiments,” “one example,” “specific example,” and “several examples” mean that the specific features, structures, materials, or properties described in relation to an embodiment or example are included in at least one embodiment or example of this application. In this specification, exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the various embodiments or examples described herein, as well as the features of the various embodiments or examples, provided that they do not conflict with each other.

[0060] While embodiments of this application have been shown and described, those skilled in the art will recognize that various changes, modifications, substitutions, and variations can be made to the embodiments without departing from the principles and spirit of this application. The scope of this application is defined by the claims and their equivalents. [Explanation of Symbols]

[0061] 100 Hub bearing 10. Bearing outer ring 11 The first channel 12 First air vent 13. Second air vent 14 Blocking section 15 Bosses 151 Female thread 16 Friction reducing agent 17 Connection part 20 Rotating Member 21 Rotating member 22 Rotating member fixing frame 30 Hub Flange 31 Flange body 311 Flange center hole 32 Flange plate 321 Beer Hall 322 fixing hole 323 Fixed Column 324 Brake disc mounting holes 40 Small inner ring 200 Rotary Seal Assembly 210 Seal Assembly 220 Rotary Air Chamber 230 Rotating Bracket 231 Rotary Channel 1000 Wheel-side device 10,000 vehicles 2000 Air source 3000 tires 4000 car bodies

Claims

1. A hub flange (30) configured to rotate in synchronization with the tire (3000), Rotating member (20) and Bearing outer ring (10), A hub bearing (100) comprising: the bearing outer ring (10) being sleeved on the hub flange (30); the rotating member (20) being positioned between the hub flange (30) and the bearing outer ring (10) to allow the hub flange (30) to rotate relative to the bearing outer ring (10); the bearing outer ring (10) being provided with a first channel (11), and a first air port (12) and a second air port (13) communicating with the first channel (11); the first air port (12) being configured to communicate with an air source (2000); and the second air port (13) being able to communicate with the tire (3000) through a rotatable air chamber (220) sleeved on the bearing outer ring (10).

2. The hub bearing (100) according to claim 1, wherein the first air vent (12) is a through hole penetrating the outer wall of the bearing outer ring (10), and / or the second air vent (13) is a through hole penetrating the outer wall of the bearing outer ring (10).

3. The direction of the airflow passing through the first air port (12) is perpendicular to the axial direction of the bearing outer ring (10), and / or The hub bearing (100) according to claim 2, wherein the direction of the airflow passing through the second air port (13) is perpendicular to the axial direction of the bearing outer ring (10).

4. The hub bearing (100) according to any one of claims 1 to 3, wherein the first channel (11) extends along the axial direction of the bearing outer ring (10).

5. The hub bearing (100) according to any one of claims 1 to 4, wherein the bearing outer ring (10) further comprises a blocking portion (14), the blocking portion (14) being located within the first channel (11) and positioned on one side of the second air port (13) furthest from the first air port (12), blocking one end of the length of the first channel (11).

6. A hub bearing (100) according to any one of claims 1 to 5, wherein the bearing outer ring (10) is provided with a boss (15) that extends outward along the radial direction of the bearing outer ring, and the boss (15) is cylindrical in order to communicate with the first air port (12).

7. The hub bearing (100) according to claim 6, wherein at least a portion of the boss (15) is provided with a female thread (151) configured to be connected in a screw manner to a first connecting pipe, and the first connecting pipe is configured to connect the first air port (12) to the air source (2000).

8. The hub bearing (100) according to any one of claims 1 to 7, wherein at least a portion of the outer wall of the bearing outer ring (10) is provided with a friction reducing agent (16).

9. The hub bearing (100) according to any one of claims 1 to 8, wherein the hub flange (30) comprises a flange plate (32), the flange plate (32) is provided with a via hole (321) through which a second connecting pipe passes, and the second connecting pipe is configured to enable communication between the rotary air chamber (220) and the tire (3000).

10. The hub bearing (100) according to claim 9, wherein the flange plate (32) is provided with a plurality of fixing holes (322) configured to fix the flange plate (32) and the rotary seal assembly (200), and the rotary air chamber (220) is provided in the rotary seal assembly (200).

11. The hub bearing (100) according to claim 10, wherein the plurality of fixing holes (322) are located on the same circumference.

12. A wheel-side device (1000) comprising a rotary seal assembly (200) and a hub bearing (100) according to any one of claims 1 to 11, wherein the rotary seal assembly (200) is provided with the rotary air chamber (220), the rotary seal assembly (200) is sleeve-mounted on the bearing outer ring (10) and fixed to the hub flange (30) so as to rotate in synchronization with the hub flange (30).

13. The wheel-side device (1000) according to claim 12, wherein the rotary seal assembly (200) comprises a seal assembly (210) and a rotary bracket (230), the rotary bracket (230) is fixed to the hub flange (30), the seal assembly (210) is fixed to the rotary bracket (230), the seal assembly (210) is sleeved on the bearing outer ring (10) and is in rotatable contact with the bearing outer ring (10), and both sides of the seal assembly (210) along the axial direction of the bearing outer ring (10) separately abut against the outer wall of the bearing outer ring (10) to form the rotary air chamber (220).

14. The wheel-side device (1000) according to claim 13, wherein the thickness of the portion of the seal assembly (210) that is rotatably in contact with the bearing outer ring (10) is between 0.5 mm and 1.5 mm.

15. A vehicle (10000) comprising an air source (2000), a tire (3000), and a wheel-side device (1000) according to any one of claims 12 to 14, wherein the air source (2000) is configured to be positioned on a vehicle body (4000), the air source (2000) is configured to selectively communicate with the first air port (12), and the rotary seal assembly (200) is configured to selectively communicate with the tire (3000).

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