Wheel hub, wheel assembly and vehicle

Abstract

This invention provides a wheel hub, a wheel assembly, and a vehicle, belonging to the field of vehicle technology. Multiple densely distributed first protrusions are provided on the inner surface of the wheel rim, forming multiple microscopic first guide grooves. These grooves create a microscopic first guide structure on the inner surface of the wheel rim. Multiple densely distributed second protrusions are provided on the end face of the wheel spokes, forming multiple microscopic second guide grooves. These grooves create a microscopic second guide structure on the end face of the wheel spokes. When water droplets adhere to the inner surface of the wheel rim or the end face of the wheel spokes, the droplets are unlikely to form a water film on the microscopic first and second guide structures. When the wheel rotates at high speed, the water droplets flow along the microscopic first or second guide grooves and gradually converge into larger droplets. These larger droplets are thrown off the wheel by the centrifugal force generated by the wheel's rotation, reducing oxidation and corrosion of the wheel hub caused by the formation of a water film.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more particularly to a wheel hub, wheel assembly, and vehicle. Background Technology

[0002] Vehicle wheel rims are typically coated with an anti-slip layer. This protective layer gives the rim surface water and dirt-repellent properties, preventing oxidation and corrosion. However, under harsh conditions such as high-speed wheel rotation and frequent impacts from gravel and braking heat, the protective layer is prone to wear, aging, and peeling, resulting in a short lifespan. When water adheres to the smooth surface of the wheel rim that has lost its protective layer, the water droplets spread and form a water film. Under the centrifugal force generated by the wheel's rotation, this water film is difficult to remove, further accelerating oxidation and corrosion of the rim. Summary of the Invention

[0003] The present invention aims to solve the technical problems existing in the above-mentioned related technologies, and proposes a wheel hub that achieves efficient self-cleaning of the wheel hub and can reduce the oxidation and corrosion caused to the wheel hub after water droplets form a water film.

[0004] The present invention also provides a wheel assembly and a vehicle including the above-described wheel hub.

[0005] According to a first aspect of the present invention, a wheel hub includes: The rim has a plurality of densely distributed first protrusions on its inner side. The plurality of first protrusions are arranged at intervals along the axial and circumferential directions of the rim. A first guide groove is formed between every two adjacent first protrusions. The plurality of first guide grooves make the inner side of the rim form a crisscrossing first guide structure. The spokes connect the inner side of the rim. The end face of the spokes is provided with a plurality of densely distributed second protrusions. A second guide groove is formed between every two adjacent second protrusions. The plurality of second guide grooves make the end face of the spokes form a crisscrossing second guide structure.

[0006] The wheel hub according to embodiments of the present invention has at least the following beneficial effects: the outer surface of the rim is used to mount a tire; the spokes connect to and support the inner surface of the rim; a plurality of densely distributed first protrusions are provided on the inner surface of the rim, forming a plurality of microscopic first guide grooves; the plurality of first guide grooves form a microscopic first guide structure on the inner surface of the rim; a plurality of densely distributed second protrusions are provided on the end face of the spokes, forming a plurality of microscopic second guide grooves; the plurality of second guide grooves form a microscopic second guide structure on the end face of the spokes; when water droplets... When water droplets adhere to the inner side of the rim or the end face of the spokes, they are difficult to form a water film on the microscopic first and second guide structures. When the wheel rotates at high speed, the water droplets will flow along the microscopic first or second guide grooves and gradually converge into larger droplets. The flowing water droplets will adsorb and carry dust from the surface of the wheel hub and eventually converge at the edge of the wheel. The larger water droplets are thrown off the wheel by the centrifugal force generated by the wheel rotation, thus achieving efficient self-cleaning of the wheel hub and reducing oxidation and corrosion of the wheel hub after the water droplets form a water film.

[0007] According to some embodiments of the present invention, each of the first protrusions extends circumferentially along the rim, and the width of each of the first protrusions gradually increases circumferentially along the rim. And / or, each of the second protrusions extends radially along the rim, and the width of each of the second protrusions gradually increases radially along the rim.

[0008] According to some embodiments of the present invention, each of the first protrusions has a first tip and a first wide end at its two ends, the width of the first tip is smaller than the width of the first wide end, and the first tip and the first wide end are respectively bent toward the two end faces of the rim; And / or, each of the second protrusions has a second tip and a second wide end at its two ends, the width of the second tip being less than the width of the second wide end, and the line connecting the second tip and the second wide end being inclined in the radial direction of the rim.

[0009] According to some embodiments of the present invention, a plurality of first protrusions are arranged in a row of first guide surfaces at intervals along the axial direction of the rim, and the plurality of first guide surfaces are arranged in a row of first guide surfaces at intervals along the circumferential direction of the rim.

[0010] According to some embodiments of the present invention, a plurality of second protrusions are arranged in a row of second guide surfaces at intervals along a direction perpendicular to the diameter of the rim, and the plurality of second guide surfaces are arranged in a row of second guide surfaces at intervals along the radial direction of the rim.

[0011] According to some embodiments of the present invention, the inner side of the rim is provided with a flange, and the flange is provided with a plurality of drainage grooves. Each drainage groove is arranged in an arc shape along the circumference of the rim, and the plurality of drainage grooves are arranged in a circular array with the axis of the rim as the center.

[0012] According to some embodiments of the present invention, the side of the spoke is provided with a drainage groove, the drainage groove is arranged radially along the rim, and the drainage groove communicates with the drainage groove.

[0013] According to some embodiments of the present invention, each of the drainage channels has a first end and a second end at its two ends, and the distance from the first end to the axis of the rim is less than the distance from the second end to the axis of the rim.

[0014] According to a second aspect of the present invention, a wheel assembly includes the wheel hub described in the first aspect of the above embodiments.

[0015] The wheel assembly according to the present invention has at least the following beneficial effects: when water droplets adhere to the inner side of the rim or the end face of the spokes, the water droplets are difficult to form a water film on the microscopic first and second guide structures. When the wheel rotates at high speed, the water droplets will flow along the microscopic first or second guide groove and gradually converge into larger water droplets. The flowing water droplets will adsorb and carry dust on the surface of the wheel hub and eventually converge to the edge of the wheel. The larger water droplets are thrown off the wheel by the centrifugal force generated by the wheel rotation, thus achieving efficient self-cleaning of the wheel hub and reducing oxidation and corrosion of the wheel hub after the water droplets form a water film.

[0016] The vehicle according to a third aspect of the present invention includes the wheel assembly described in the second aspect of the above embodiments.

[0017] Since the vehicle adopts all the technical solutions of the wheel assembly of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the inner surface of the wheel rim according to the first embodiment of the present invention; Figure 2 This is a schematic diagram of the inner side surface of the wheel rim according to the second embodiment of the present invention; Figure 3 This is a schematic diagram of the inner side surface of the rim according to the third embodiment of the present invention; Figure 4 This is a schematic diagram of the inner side surface of the rim according to the fourth embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the first embodiment of the spokes of the present invention; Figure 6 yes Figure 5 Enlarged diagram of A in the middle; Figure 7 yes Figure 5 Enlarged diagram of B in the middle; Figure 8 This is a schematic diagram of the structure of a second embodiment of the spokes of the present invention; Figure 9 This is a structural schematic diagram of the third embodiment of the spokes of the present invention; Figure 10 This is a schematic diagram of the fourth embodiment of the spokes of the present invention.

[0019] Reference numerals: rim 100, flange 101, first protrusion 110, first tip 111, first wide end 112, first guide groove 120, first guide structure 130, first guide surface 140, drainage groove 150, first end 151, second end 152, spoke 200, second protrusion 210, second tip 211, second wide end 212, second guide groove 220, second guide structure 230, second guide surface 240. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. 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.

[0021] In the description of this invention, it should be understood that the terms front, back, up, down, axial, circumferential, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0022] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, it should be noted that terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of the present invention, not all embodiments.

[0025] Wheel hub surface protection is receiving increasing attention and importance from users. Among related technologies, wheel hub surface protection mainly revolves around material coatings, macroscopic flow guiding structures, and passive hydrophobic surfaces. However, there are still a series of significant defects that limit its practical application effect and durability.

[0026] Common protective methods currently include: 1. Hydrophobic or oleophobic coating technology: By spraying a fluorine-containing or silane-based coating onto the wheel hub surface, the surface is given certain water and dirt repellency. However, under the harsh conditions of high-speed wheel rotation and frequent impact from gravel and braking heat, this type of coating is prone to wear, aging, and peeling, resulting in a short protective life. 2. Macroscopic drainage channel design: Some wheel hubs incorporate macroscopic grooves or curved surfaces in their design, intending to use centrifugal force to eject water. However, these grooves lack the coordination of microscopic structures. Therefore, their guiding effect on small water droplets or viscous sludge is limited, and wastewater easily remains in the channel, leaving stains after evaporation. 3. Surface smoothing treatment: Most wheel hubs pursue a smooth surface texture, but a smooth surface is more likely to cause water droplets to spread and form a water film in a humid environment. The water film is not easy to fall off under the centrifugal force generated by the rotation of the wheel hub. 4. Reliance on physical cleaning: Currently, wheel hub cleaning still mainly relies on manual labor or high-pressure water guns, which not only consumes time and resources, but may also accelerate the damage and corrosion of the surface coating during frequent cleaning.

[0027] Based on this, the present invention provides a wheel hub. When water droplets adhere to the inner side of the rim 100 or the end face of the spoke 200, the water droplets are difficult to form a water film in the first guide structure 130 and the second guide structure 230. When the wheel rotates at high speed, the water droplets will flow along the microscopic first guide groove 120 or the second guide groove 220 and gradually converge into larger water droplets. The flowing water droplets will adsorb and carry dust on the surface of the wheel hub and eventually converge to the edge of the wheel. The larger water droplets are thrown off the wheel by the centrifugal force generated by the wheel rotation, thus achieving efficient self-cleaning of the wheel hub and reducing the oxidation and corrosion caused to the wheel hub after the water droplets form a water film.

[0028] Reference Figures 1 to 10 As shown, the present invention provides a wheel hub.

[0029] Reference Figure 1 , Figure 5 , Figure 6 , Figure 7As shown, the wheel hub of the first embodiment of the present invention includes a rim 100 and spokes 200. A plurality of spokes 200 are connected to the inner side of the rim 100. The plurality of spokes 200 are distributed at intervals along the circumference of the rim 100, and each spoke 200 is connected to the inner side of the rim 100.

[0030] Reference Figure 1 As shown, the inner surface of the rim 100 is provided with a plurality of densely distributed first protrusions 110. The width of each first protrusion 110 is on the order of millimeters. Each first protrusion 110 extends circumferentially along the rim 100, and the width of each first protrusion 110 in the axial direction of the rim 100 gradually increases along the rotation direction of the rim 100. In this embodiment, when the wheel drives the vehicle forward, the rotation direction of the rim 100 is taken as the forward rotation direction, and the width of each first protrusion 100 gradually increases along the forward rotation direction of the rim 100.

[0031] In this embodiment, each first protrusion 110 has a first tip 111 and a first wide end 112 at its two ends, respectively. The width of the first tip 111 is smaller than the width of the first wide end 112, and the length between the first tip 111 and the first wide end 112 is much greater than the width of the first wide end 112, so that the first protrusion 110 forms a micro-spiky structure extending circumferentially on the surface of the rim 100.

[0032] Multiple first protrusions 110 are distributed and arranged in a row of first guide surfaces 140 along the axial direction of the rim 100. A microscopic first guide groove 120 is formed between every two adjacent first protrusions 110. The multiple first guide surfaces 140 are distributed and arranged in a row along the circumference of the rim 100, so that the multiple first guide grooves 120 form a crisscrossing microscopic first guide structure 130.

[0033] Reference Figure 5 and Figure 7 As shown, the edge of the rim 100 is provided with an outwardly folded rim 101. The inner side of the rim 100 and the rim 101 are smoothly transitioned. The rim 101 is provided with a plurality of drainage grooves 150 distributed circumferentially. The plurality of drainage grooves 150 are arranged in a circular array with the axis of the rim 100 as the center. Each drainage groove 150 extends in an arc shape along the circumference of the rim 100. The two ends of each drainage groove 150 are a first end 151 and a second end 152, respectively. The distance from the first end 151 to the axis of the rim 100 is less than the distance from the second end 152 to the axis of the rim 100. That is, the first end 151 is connected to the inner side of the rim 100, and the second end 152 is connected to the outer edge of the rim 100.

[0034] Reference Figure 5 and Figure 6As shown, each spoke 200 is connected to the inner side of the rim 100, and the spoke 200 is close to any end face of the rim 100, so that the spoke 200 is connected to any rim 101 of the rim 100.

[0035] Each spoke 200 has a plurality of second protrusions 210 on its end face facing the outer side of the vehicle. The width of each second protrusion 210 is in the millimeter range. Each second protrusion 210 extends radially along the rim 100, and the width of each second protrusion 210 in the circumferential direction of the rim 100 gradually increases radially along the rim 100.

[0036] In this embodiment, each second protrusion 210 has a second tip 211 and a second wide end 212 at its two ends, respectively. The width of the second tip 211 is smaller than the width of the second wide end 212, and the length between the second tip 211 and the second wide end 212 is much greater than the width of the second wide end 212, so that the second protrusion 110 forms a micro-spiky structure extending radially along the rim 100 on the end face of the spoke 200.

[0037] Multiple second protrusions 210 are sequentially spaced along a direction perpendicular to the radial direction of the rim 100 to form a row of second guide surfaces 240. A microscopic second guide groove 220 is formed between every two adjacent second protrusions 210. The multiple second guide surfaces 240 are sequentially spaced along the circumference of the rim 100 so that the multiple second guide grooves 220 form a crisscrossing microscopic second guide structure 230.

[0038] Each spoke 200 has multiple drainage grooves (not shown in the figure) on two adjacent sides of its end face. The multiple drainage grooves are arranged radially along the rim 100 and extend toward the inner side of the rim 100 and connect to the drainage groove 150 of the rim 101.

[0039] Reference Figure 2 and Figure 8 As shown, the difference between the second embodiment of the present invention and the first embodiment lies in the structure of the first protrusion 110 and the second protrusion 210.

[0040] In the second embodiment, each first protrusion 110 extends circumferentially along the rim 100, and the width of each first protrusion 110 in the axial direction of the rim 100 gradually increases along the rotation direction of the rim 100. Each first protrusion 110 includes a first tip 111 and a first wide end 112. The first tip 111 and the first wide end 112 bend and extend toward the two end faces of the rim 100, so that the first protrusion 110 has a curved spike structure on the inner side of the rim 100.

[0041] Each second protrusion 210 extends radially along the rim 100, and the width of each second protrusion 210 in the circumferential direction of the rim 100 gradually increases radially along the rim 100. Each second protrusion 210 includes a second tip 211 and a second wide end 212, which bend and extend toward two opposite sides of the spoke 200, respectively. That is, the line connecting the second tip 211 and the second wide end 212 is inclined to the radial direction of the rim 100.

[0042] Reference Figure 3 and Figure 9 As shown, the difference between the third embodiment of the present invention and the first embodiment lies in the first protrusion 110 and the second protrusion 210.

[0043] In the third embodiment, each first protrusion 110 is rectangular, and multiple first protrusions 110 are distributed at intervals along the circumference and axial direction of the rim 100. A microscopic first guide groove 120 is formed between every two adjacent first protrusions 110. The width of the first protrusion 110 is on the millimeter level, and multiple first guide grooves 120 form a crisscrossing microscopic first guide structure 130 on the inner side of the rim 100.

[0044] Each second protrusion 210 is rectangular, and multiple second protrusions 210 are densely distributed on the end face of the spoke 200. A microscopic second guide groove 220 is formed between every two adjacent second protrusions 210. The width of the second protrusion 210 is on the millimeter level. Multiple second guide grooves 220 form a crisscrossing microscopic second guide structure 230 on the end face of the spoke 200.

[0045] Reference Figure 4 and Figure 10 As shown, the difference between the third embodiment of the present invention and the first embodiment lies in the first protrusion 110 and the second protrusion 210.

[0046] In the fourth embodiment, each first protrusion 110 is circular, and multiple first protrusions 110 are distributed at intervals along the circumference and axial direction of the rim 100. A microscopic first guide groove 120 is formed between every two adjacent first protrusions 110. The width of the first protrusion 110 is on the millimeter level, and multiple first guide grooves 120 form a crisscrossing microscopic first guide structure 130 on the inner side of the rim 100.

[0047] Each second protrusion 210 is circular, and multiple second protrusions 210 are densely distributed on the end face of the spoke 200. A microscopic second guide groove 220 is formed between every two adjacent second protrusions 210. The width of the second protrusion 210 is on the millimeter level. Multiple second guide grooves 220 form a crisscrossing microscopic second guide structure 230 on the end face of the spoke 200.

[0048] This invention proposes a complete process from macroscopic layout to microscopic design, from biomimetic principles to manufacturing technology. Its core lies in constructing a wheel hub surface protection scheme driven by centrifugal force and guided by surface structure and hydrophobic components.

[0049] Improving wheel aerodynamics: A clean wheel with a regularly textured surface exhibits superior airflow characteristics compared to a wheel covered in irregular dirt, reducing turbulence and wind resistance. For new energy vehicles, every reduction in wind resistance directly translates into an increase in driving range.

[0050] Reduced wheel hub manufacturing costs: Because all functions are achieved through a one-piece molded physical structure, rather than a chemical coating applied later, there are no issues with coating wear, aging, or peeling. Its self-cleaning ability lasts as long as the wheel hub itself, achieving "maintenance-free" operation. In the long run, this saves users on maintenance and replacement costs.

[0051] Enhanced braking safety: Traditional wheel hubs cause mud and water to splash erratically. This design, however, actively controls the exit path of sewage and dust through precise tangential projection, keeping them away from the brake discs and pads at the center of the wheel hub. This significantly reduces the risk of brake system contamination, ensuring its responsiveness and reliability in rain and snow.

[0052] The microscopic surface structure design of the wheel hub is as follows: 1. Non-smooth surfaces and micro-grooves: Specific design: In key areas prone to water accumulation (especially the inner surface of the rim 100 and the end face of the spokes 200, which are prone to sewage buildup), the traditional smooth surface is abandoned in favor of a regular micro-texture design. These textures can be: Array-like micro-ridges: a series of parallel or radial tiny protrusions; Pockmark texture: a micron-scale array of pits similar to the surface of a lotus leaf; Composite grooves: Sub-millimeter-level secondary groove network is further processed in the macro-guide grooves on the inner side of the rim 100 or the end face of the spoke 200; Bionic principle: This structure mimics the topological structure of cactus spines, the tips of which are curved (e.g., the first protrusion 110 and the second protrusion 210 in the second embodiment). It can efficiently guide morning dew to the base by utilizing the micro-gradient structure of its surface and its own asymmetrical shape. In this design, the asymmetrical guide grooves formed between the cactus spines play a similar role. Implementation: Achieved through precision casting (using a mold with a specific surface texture), forging (using a textured mold), or subsequent laser engraving / etching processes.

[0053] 2. Tangential water collection and projection channel: Specific design: More prominent water collection channels (i.e., drainage channels 150) are designed on the edge of the hub structure (i.e., the rim 101). These drainage channels 150 are extensions and convergence points of the guide channels, and their outlets are precisely set in the tangential direction of the hub rotation. Implementation method: Make full use of the structural space at the connection between the hub spokes 200 and the rim 100, and combine functional channels with structural elements such as reinforcing ribs to achieve integrated design.

[0054] 3. Comparison of manufacturing technology solutions: Casting solution: Use investment casting or low-pressure casting for the wheel hub. The mold cavity already contains all the macroscopic guide channels and some microscopic textures. Forging solution: For high performance requirements, forging is used. The forging die is also pre-textured. Although it is more difficult, the strength and fatigue performance of the formed parts are better, and the durability of the microtexture is also better. Machining solution: As a supplement, the key flow guide surfaces and flow channels are precision machined by five-axis CNC to ensure the accuracy of dimensions and flow direction; the micro-texture can also be achieved through high-precision laser processing.

[0055] The surface treatment process is as follows: 1. Implementation Plan: The high-temperature adsorption of organic matter from the air by the aluminum alloy wheel hub leads to the synthesis of hydrophobic groups and the decomposition of hydrophilic groups on the surface, reducing the surface energy and exhibiting hydrophobic properties. Through the synergistic effect of surface modification and micro / nano structures, a stable superhydrophobic property is formed on the wheel hub surface. When the wheel hub surface encounters water droplets or mud, the various biomimetic hydrophobic micro-grooves on the surface act like "tracks," capturing the droplets. Using the Laplace pressure difference, the tiny water droplets are actively pumped and converged into larger droplets. The flowing water droplets adsorb and carry away surface dust, eventually converging into the drainage groove 150 at the wheel edge. The centrifugal force generated by the wheel hub's rotation provides a powerful driving force, ejecting wastewater from the wheel hub at high speed and direction, achieving efficient self-cleaning of the wheel hub.

[0056] Adjustment of the included angle of micro-grooves: 1. Core Principle: The ability of a liquid to move on a solid surface is constrained by the pinning effect of the contact line between the liquid, gas, and solid phases. The Laplace pressure (ΔP) is related to the liquid surface tension (γ) and the radius of curvature of the surface (R): ΔP = γ(1 / R1 + 1 / R2). By designing specific micro-geometry, different radii of curvature can be artificially created at the front and rear ends of the droplet, thereby generating a Laplace pressure difference (ΔP) that drives the droplet to move in a specific direction.

[0057] 2. Adjustment of groove angle: Design a wedge-shaped (V-shaped) open microgroove, such as the first guide groove 120 and the second guide groove 220 formed by the first protrusion 110 and the second protrusion 210 in the second embodiment. When part of the droplet is at the narrow end of the groove and the other part is at the wide end, the radius of curvature of the liquid surface at the narrow end is smaller, resulting in a higher (more "negative") Laplace pressure, while the Laplace pressure at the wide end is relatively lower. This pressure difference will spontaneously push the droplet from the narrow end (high pressure) to the wide end (low pressure).

[0058] 3. Structure screening: Through computational fluid dynamics (CFD) simulations and experiments, the angle, depth, and spacing of the wedge-shaped grooves were systematically varied to screen out the optimal angle (e.g., 10°-15°) that could generate the maximum driving pressure on water droplets, thereby achieving the fastest convergence and guiding speed.

[0059] 4. Test method for surface hydrophobicity: The water contact angle of the wheel hub sample surface was quantitatively measured to evaluate its hydrophobicity level, and the adhesion and rolling behavior of water droplets on the surface were observed, providing key data support for the realization of the self-cleaning function.

[0060] The key to the embodiments of the present invention lies in the following two points: 1. A wedge-shaped groove structure is proposed on the surface of the wheel hub: In the area of ​​the wheel hub that is prone to dirt accumulation, a micro-groove with a specific wedge angle is designed. The difference in the radius of curvature generated at both ends of the droplet by the structure is used to form a Laplace pressure, thereby actively driving the tiny droplets to move and converge in a predetermined direction. 2. A structure-function synergistic active protection system is proposed: By combining the above-mentioned micro-texture with directional flow guidance function (the first flow guiding structure 130 on the inner side of the rim 100 and the second flow guiding structure 230 on the end face of the spoke 200), the tangential water collection and projection channel (drainage channel 150) on the edge of the hub, and the driving force provided by centrifugal force, a complete and active self-cleaning system from droplet capture, pumping and convergence to directional projection of sewage is constructed.

[0061] This invention also provides a wheel assembly, including the wheel hub described in the above embodiments.

[0062] The vehicle uses a wheel assembly. When water droplets adhere to the inner side of the rim 100 or the end face of the spoke 200, the water droplets are difficult to form a water film on the microscopic first guide structure 130 and second guide structure 230. When the wheel rotates at high speed, the water droplets will flow along the microscopic first guide groove 120 or second guide groove 220 and gradually converge into larger water droplets. The flowing water droplets will adsorb and carry dust on the surface of the wheel hub and eventually converge to the edge of the wheel. The larger water droplets are thrown off the wheel by the centrifugal force generated by the wheel rotation, realizing efficient self-cleaning of the wheel hub and reducing the oxidation and corrosion of the wheel hub caused by the formation of a water film by the water droplets.

[0063] This invention also provides a vehicle, including the wheel assembly described in the above embodiments. The vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck. The vehicle can also be a commercial vehicle, such as a van, bus, small truck, or large semi-trailer. The vehicle can be a gasoline-powered vehicle or a new energy vehicle. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0064] Since the vehicle adopts all the technical solutions of the wheel assembly of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0065] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A wheel hub, characterized in that, include: The rim has a plurality of densely distributed first protrusions on its inner side. The plurality of first protrusions are arranged at intervals along the axial and circumferential directions of the rim. A first guide groove is formed between every two adjacent first protrusions. The plurality of first guide grooves make the inner side of the rim form a crisscrossing first guide structure. The spokes connect the inner side of the rim. The end face of the spokes is provided with a plurality of densely distributed second protrusions. A second guide groove is formed between every two adjacent second protrusions. The plurality of second guide grooves make the end face of the spokes form a crisscrossing second guide structure.

2. The wheel hub according to claim 1, characterized in that, Each of the first protrusions extends circumferentially along the rim, and the width of each of the first protrusions gradually increases circumferentially along the rim. And / or, each of the second protrusions extends radially along the rim, and the width of each of the second protrusions gradually increases radially along the rim.

3. The wheel hub according to claim 2, characterized in that, Each of the first protrusions has a first tip and a first wide end at its two ends, the width of the first tip being smaller than the width of the first wide end, and the first tip and the first wide end bending toward the two end faces of the rim respectively. And / or, each of the second protrusions has a second tip and a second wide end at its two ends, the width of the second tip being less than the width of the second wide end, and the line connecting the second tip and the second wide end being inclined in the radial direction of the rim.

4. The wheel hub according to claim 2, characterized in that, Multiple first protrusions are arranged in a row of first guide surfaces at intervals along the axial direction of the rim, and multiple first guide surfaces are arranged in a row of first guide surfaces at intervals along the circumference of the rim.

5. The wheel hub according to claim 2, characterized in that, Multiple second protrusions are arranged in a row of second guide surfaces at intervals along a direction perpendicular to the diameter of the rim, and multiple second guide surfaces are arranged in a row of second guide surfaces at intervals along the radial direction of the rim.

6. The wheel hub according to claim 1, characterized in that, The inner edge of the rim is provided with a flange, and the flange is provided with a plurality of drainage grooves. Each drainage groove is arranged in an arc shape along the circumference of the rim, and the plurality of drainage grooves are arranged in a circular array with the axis of the rim as the center.

7. The wheel hub according to claim 6, characterized in that, The spokes are provided with drainage grooves on their sides, which are arranged radially along the rim and are connected to the drainage grooves.

8. The wheel hub according to claim 6, characterized in that, Each of the drainage channels has a first end and a second end at its two ends, and the distance from the first end to the axis of the wheel rim is less than the distance from the second end to the axis of the wheel rim.

9. A wheel assembly, characterized in that, The wheel hub includes any one of claims 1 to 8.

10. A car, characterized in that, Includes the wheel assembly as described in claim 9.

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