Hubcap, wheel and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a hubcap, a wheel and a vehicle, and the hubcap comprises a fixed baffle assembly which comprises a first fixed part and a plurality of first baffles arranged at intervals in the circumferential direction of the first fixed part; the driving assembly is connected with the first fixing part; the movable baffle assembly is arranged on the side, away from the hub, of the fixed baffle assembly, and the movable baffle assembly comprises a second fixing part connected with the output end of the driving assembly and a plurality of second baffles arranged in the circumferential direction of the second fixing part at intervals; the speed sensing assembly is used for detecting the speed of the wheels; when the speed of the wheels is larger than the vehicle speed threshold value, the driving assembly drives the second baffles to rotate so as to cover the gap between every two adjacent first baffles. When the speed of the wheels is smaller than or equal to the vehicle speed threshold value, the driving assembly drives the second baffle to rotate reversely to open the gap. According to the invention, hub turbulence can be combed, vehicle wind resistance is reduced, noise is inhibited, and energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a hub cover, a wheel and a vehicle. Background Art

[0002] The vehicle's drag coefficient has a significant impact on the vehicle's acceleration performance and economy. For a moving vehicle, only when the engine power is greater than the three types of resistance can the vehicle accelerate to the target speed. Among them, the first type of resistance is the friction resistance between the tires and the ground; the second type of resistance is the resistance of the various components responsible for transmission on the vehicle; the third type of resistance is air resistance, also known as wind resistance.

[0003] When the vehicle is traveling at a speed of 80 km / h, about 60% of the power is used to overcome air resistance. When the speed reaches 200 km / h, 85% of the vehicle's current output power will be consumed in breaking air resistance. Among them, the wheel turbulence of the vehicle will have a significant impact on the vehicle's wind resistance, thereby generating wind noise and affecting energy consumption. Utility Model Content

[0004] The purpose of the present application is to provide a hub cover, a wheel and a vehicle, which can sort out hub turbulence, reduce vehicle wind resistance, suppress noise and reduce energy consumption.

[0005] In a first aspect, an embodiment of the present application provides a hub cover, which is applied to the hub of a wheel, and the hub cover includes: a fixed baffle assembly, including a first fixed portion coaxially arranged with the hub and a plurality of first baffles spaced apart in a circumferential direction of the first fixed portion; a driving assembly connected to the first fixed portion; a movable baffle assembly, which is arranged on a side of the fixed baffle assembly away from the hub, the movable baffle assembly including a second fixed portion and a plurality of second baffles spaced apart in a circumferential direction of the second fixed portion, the second fixed portion being connected to an output end of the driving assembly; and a speed sensing assembly, which is used to detect the speed of the wheel; wherein, when the speed of the wheel is greater than a vehicle speed threshold, the driving assembly drives the movable baffle assembly to rotate so that the second baffle covers the gap between two adjacent first baffles; when the speed of the wheel is less than or equal to the vehicle speed threshold, the driving assembly drives the movable baffle assembly to rotate in the opposite direction so that the second baffle opens the gap between two adjacent first baffles.

[0006] According to the above technical means, the speed of the wheel is detected by the speed sensing component, and when the speed of the wheel is greater than the vehicle speed threshold, the driving component drives the second baffle of the movable baffle assembly to cover the gap between the two adjacent first baffles, so as to sort out the hub turbulence, reduce the vehicle wind resistance, suppress noise, and reduce energy consumption; at the same time, when the wheel speed is less than or equal to the vehicle speed threshold, the driving component drives the second baffle of the movable baffle assembly to open the gap between the two adjacent first baffles to improve the heat dissipation effect.

[0007] Furthermore, the speed sensing component includes a Hall sensor and a magnet. The Hall sensor is arranged on the end face of the rotating shaft of the wheel hub, the magnet is arranged on the first fixing portion, and the Hall sensor and the magnet are arranged opposite to each other.

[0008] According to the above technical means, when the wheel starts to rotate, the fixed baffle assembly rotates, driving the magnet to rotate. The Hall effect occurs between the rotating magnet and the relatively stationary Hall sensor. The Hall sensor generates a voltage difference under the action of the Lorentz force of the magnetic field and outputs a corresponding signal, thereby calculating the wheel rotation speed.

[0009] Furthermore, the magnet is a circular ring structure with a notch, the orthographic projection of the Hall sensor on the first fixing portion is located on the magnet, and the Hall sensor sends an electrical signal when it corresponds to the notch.

[0010] According to the above technical means, as the wheel rotates, the magnet produces regular changes in the magnetic field. Every time the wheel rotates one circle, the magnetic field changes in a cycle. The signal output by the Hall sensor when corresponding to the notch also changes in a cycle. By detecting the changes in the output signal of the Hall sensor, the number of rotations of the wheel can be calculated, the direction of movement of the wheel can be determined, and then combined with the rotation time of the wheel, the wheel speed can be calculated.

[0011] Furthermore, the first fixing part is a hollow column, the inner wall of the first fixing part is provided with a bracket, and the magnet and the driving assembly are arranged on the bracket.

[0012] According to the above technical means, the magnet and the driving assembly can be assembled inside the first fixing part, which has a beautiful appearance and is not easy to be damaged.

[0013] Furthermore, the driving assembly includes a stepper motor or a stepper motor and a reducer connected to an output shaft of the stepper motor. The output shaft of the stepper motor or the reducer extends from the first fixing part and is coaxially connected to the second fixing part.

[0014] According to the above technical means, a driving component is selected according to the application scenario, and the second fixed part is driven to rotate through the output end of the driving component to drive the second baffle to cover or open the gap between two adjacent first baffles. The structure is simple and easy to implement.

[0015] Furthermore, a flexible flange extending toward the wheel hub is provided on the edge of the second baffle plate, and the second baffle plate covers the gap between two adjacent first baffle plates through the flexible flange.

[0016] According to the above technical means, the flexible flange of the second baffle can ensure that it can effectively block the gap between two adjacent first baffles, sort out the hub turbulence, and prevent the hub turbulence from affecting the wind resistance of the vehicle.

[0017] Furthermore, the hub cover also includes a controller, which is connected to the bracket, and the controller is electrically connected to the drive component and the speed sensing component through a wiring harness.

[0018] According to the above technical means, the controller is independently set and is not affected by the vehicle's own state, and has better anti-interference characteristics.

[0019] Furthermore, the hub cover also includes a power supply, which is arranged on the bracket and is used to supply power to the driving component, the speed sensing component and the controller.

[0020] According to the above technical means, the power supply can supply power to the drive component, speed sensing component and controller, further realizing independent control without being affected by the vehicle's own state such as wheel slippage.

[0021] In a second aspect, an embodiment of the present application further provides a wheel, comprising: a wheel hub; and a hub cover as described above, wherein the hub cover is detachably connected to the wheel hub via a plurality of first baffles.

[0022] According to the above technical means, the hub cover and the wheel hub can be detachably connected to facilitate later maintenance.

[0023] In a third aspect, an embodiment of the present application further provides a vehicle, comprising the wheel as described above.

[0024] The vehicle provided in the embodiment of the present application can not only actively adjust the wind resistance of the wheel hub according to the needs under different vehicle states, reduce the partial wind resistance of the wheel hub, reduce the fuel consumption of the vehicle, and improve the comfort in the vehicle, but also has the advantages of low cost of transformation, enhanced applicability, simplified system processing logic, and is conducive to promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram showing the structure of a wheel provided in an embodiment of the present application is shown;

[0026] Figure 2 A schematic diagram showing the exploded structure of a hub cover provided in an embodiment of the present application is shown;

[0027] Figure 3 Show Figure 2 Schematic diagram of the structure of the speed sensing component shown.

[0028] Among them, 1, hub cover; 11, fixed baffle assembly; 111, first fixed part; 112, first baffle; 113, bracket;

[0029] 12. movable baffle assembly; 121. second fixing portion; 122. second baffle; 122A. flexible flange;

[0030] 13. Drive assembly; 14. Speed ​​sensing assembly; 141. Hall sensor; 142. Magnet; 142A. Notch; 15. Controller; 16. Power supply; 2. Wheel hub. DETAILED DESCRIPTION

[0031] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0033] The current society is developing rapidly, and automobile production and sales data have repeatedly hit new highs. In the trend of automobile electrification and intelligent networking, the relationship between cars and people has also been redefined. Cars have transformed from traditional "travel tools" to "intelligent spaces" consisting of a smart terminal and four wheels, creating a space full of imagination for the future development of the automotive industry. In the process of embracing change, aftermarket smart vehicle products and derivatives have also increased. As an important part of the vehicle, the wheel hub presents huge room for expansion in the direction of intelligence. The current wheel hub intelligent solution mainly focuses on the research of reducing wind resistance, but it is generally implemented in a mechanical or fixed way, with problems such as a large number of sensors and complex structure, which is difficult to implement and has high cost.

[0034] To this end, the present invention provides a hub cover, a wheel and a vehicle, which can sort out hub turbulence, reduce vehicle wind resistance, suppress noise and reduce energy consumption. The specific structure of the hub cover and the wheel provided in the present invention is described in detail below with reference to the accompanying drawings.

[0035] like Figure 1 and Figure 2 As shown, the wheel provided in the embodiment of the present application includes a wheel hub 2 and a hub cover 1. The hub cover 1 includes: a fixed baffle assembly 11, a movable baffle assembly 12, a driving assembly 13 and a speed sensing assembly 14.

[0036] The fixed baffle assembly 11 includes a first fixing portion 111 coaxially arranged with the wheel hub 2 and a plurality of first baffles 112 spaced apart along the circumferential direction of the first fixing portion 111 . The wheel hub cover 1 is detachably connected to the wheel hub 2 via the plurality of first baffles 112 .

[0037] The movable baffle assembly 12 is arranged on the side of the fixed baffle assembly 11 away from the wheel hub 2. The movable baffle assembly 12 includes a second fixed portion 121 and a plurality of second baffles 122 spaced apart along the circumferential direction of the second fixed portion 121. The driving assembly 13 is connected to the first fixed portion 111, and the second fixed portion 121 is connected to the output end of the driving assembly 13.

[0038] The speed sensing component 14 is used to detect the speed of the wheel. When the speed of the wheel is greater than the vehicle speed threshold, the driving component 13 drives the movable baffle assembly 12 to rotate so that the second baffle 122 covers the gap between the two adjacent first baffles 112; when the speed of the wheel is less than or equal to the vehicle speed threshold, the driving component 13 drives the movable baffle assembly 12 to rotate in the opposite direction so that the second baffle 122 opens the gap between the two adjacent first baffles 112.

[0039] Optionally, the speed threshold is 150km / h±50km / h. For example, if the vehicle usually travels in a desert area or suburb with a high wind speed, the speed threshold may be 200km / h; if the vehicle usually travels in a city with a low wind speed, the speed threshold may be 100km / h. Of course, the speed threshold may also be other values, depending on the specific application scenario.

[0040] In this embodiment, when the speed of the vehicle is greater than the vehicle speed threshold, the gap between the two adjacent first baffles 112 in the fixed baffle assembly 11 may increase air turbulence during driving, resulting in increased wind resistance and increased noise. At this time, the driving assembly 13 drives the movable baffle assembly 12 to rotate, and the rotation direction can be clockwise or counterclockwise, so that the second baffle 122 covers the gap between the two adjacent first baffles 112, thereby combing the hub turbulence, reducing vehicle wind resistance, suppressing noise, and reducing energy consumption.

[0041] When the speed of the vehicle is less than or equal to the vehicle speed threshold, the temperature of the brake system rises, and the heat dissipation demand is greater than the wind resistance reduction demand. At this time, the drive assembly 13 drives the movable baffle assembly 12 to rotate in the opposite direction, so that the second baffle 122 opens the gap between the two adjacent first baffles 112, and the brake system is cooled through the gap.

[0042] The wheel and hub cover 1 provided in the embodiment of the present application detect the speed of the wheel through the speed sensing component 14. When the speed of the wheel is greater than the vehicle speed threshold, the driving component 13 drives the second baffle 122 of the movable baffle component 12 to cover the gap between the two adjacent first baffles 112, so as to sort out the hub turbulence, reduce the vehicle wind resistance, suppress noise, and reduce energy consumption; at the same time, when the speed of the wheel is less than or equal to the vehicle speed threshold, the driving component 13 drives the second baffle 122 of the movable baffle component 12 to open the gap between the two adjacent first baffles 112 to improve the heat dissipation effect. In this way, the wind resistance of the wheel hub can be actively adjusted according to the needs of the vehicle in different states, thereby improving air resistance or braking heat dissipation and reducing the energy consumption of the whole vehicle.

[0043] In some embodiments, the speed sensing component 14 includes a Hall sensor 141 and a magnet 142 . The Hall sensor 141 is disposed on the end face of the rotating shaft of the hub 2 , and the magnet 142 is disposed on the first fixing portion 111 . The Hall sensor 141 and the magnet 142 are disposed opposite to each other.

[0044] Optionally, the wheel hub bearing is fixedly mounted on the wheel hub, one end of the rotating shaft penetrates the wheel hub bearing, and the rotating shaft is fastened to the end face of the wheel hub bearing by a fixing bolt, and the other end is fixed to the frame to ensure that the wheel does not fall off the rotating shaft. The Hall sensor 141 can be fixed to the end face of the rotating shaft, and more specifically, the Hall sensor 141 can be arranged on the end face of the bolt head of the fixing bolt.

[0045] Since the fixing bolts are stationary relative to the frame when the wheel rotates, the Hall sensor 141 is stationary relative to the frame. The hub cover 1 is fixedly covered on the wheel hub from the outside of the wheel, and the magnet 142 is arranged on the first fixing part 111 of the hub cover 1 and is non-contacted with the Hall sensor 141. When the wheel starts to rotate, the hub drives the hub cover 1 to rotate, and then drives the magnet 142 to rotate. The Hall effect occurs between the rotating magnet 142 and the Hall sensor 141. The Hall sensor 141 generates a voltage difference under the action of the Lorentz force of the magnetic field and outputs a corresponding signal, so that the rotation speed of the wheel can be calculated.

[0046] In addition, the Hall effect sensor 141 can generally operate at a temperature of 150° C., and its operation is less affected by temperature, further improving the reliability of the speed sensing component 14 .

[0047] Furthermore, the magnet 142 is a circular ring structure with a notch 142A, and the orthographic projection of the Hall sensor 141 on the first fixing portion 111 is located on the magnet 142 . The Hall sensor 141 sends an electrical signal when it corresponds to the notch 142A.

[0048] like Figure 2 and Figure 3As shown, the magnet 142 is a circular ring structure with a notch 142A, and the positive projection of the Hall sensor 141 on the first fixed part 111 is located on the magnet 142. The circular end face of the magnet 142 is directly opposite to the Hall sensor 141, and the magnetization direction is radial magnetization. When the circular and radially magnetized magnet 142 rotates, the direction of its magnetic pole will change with the rotation of the magnet 142. When the Hall sensor 141 corresponds to the notch 142A, an electrical signal is sent. The voltage difference generated by the Hall effect of the Hall sensor 141 will change regularly, and the output signal will also change regularly. As the wheel rotates, the magnet 142 produces regular magnetic field changes. Every time the wheel rotates one circle, the magnetic field changes by a cycle, and the electrical signal output by the Hall sensor 141 also changes by a cycle. The number of pulses will increase with the increase of vehicle speed, but the duty cycle of the position remains constant at any speed. By detecting the changes in the output signal of the Hall sensor, the number of rotations of the wheel can be calculated, the direction of movement of the wheel can be determined, and the wheel speed can be calculated by combining the rotation time of the wheel.

[0049] In some embodiments, the first fixing portion 111 is a hollow cylinder, and a bracket 113 is disposed on the inner wall of the first fixing portion 111, and the magnet 142 and the driving component 13 are disposed on the bracket 113. Figure 2 As shown, the magnet 142 and the driving assembly 13 are assembled inside the first fixing portion 111 , which has a beautiful appearance and is not easily damaged.

[0050] In some embodiments, the driving assembly 13 includes a stepper motor, and an output shaft of the stepper motor extends from the first fixing portion 111 and is coaxially connected to the second fixing portion 121 .

[0051] The stepper motor works based on the most basic electromagnet principle, and it relies on the change of air gap magnetic permeability to generate electromagnetic torque. Specifically, the stepper motor receives the digital control signal (electric pulse signal) of the Hall sensor 141 and converts it into the corresponding angular displacement or linear displacement. The stepper motor itself is an actuator that completes the digital mode conversion, and can be open-loop position controlled. A pulse signal is input to obtain a specified position increment. Compared with the traditional DC control system, this incremental position control system has significantly lower costs and almost no system adjustment is required. The angular displacement of the stepper motor is strictly proportional to the number of input pulses, and is synchronized with the pulses in time. Therefore, as long as the number of pulses, frequency and phase sequence of the motor windings are controlled, the required angle, speed and direction can be obtained.

[0052] In other embodiments, the driving assembly 13 includes a stepper motor and a reducer connected to the output shaft of the stepper motor, the output shaft of the reducer extends from the first fixing portion 111 and is coaxially connected to the second fixing portion 121. The driving assembly 13 is selected according to the application scenario, and the second fixing portion 121 is driven to rotate by the output end of the driving assembly 13 to drive the second baffle 122 to cover or open the gap between two adjacent first baffles 112. The structure is simple and easy to implement.

[0053] In some embodiments, a flexible flange 122A extending toward the hub 2 is disposed at an edge of the second baffle 122 , and the second baffle 122 covers the gap between two adjacent first baffles 112 via the flexible flange 122A.

[0054] Optionally, the flexible flange 122A is made of rubber or silicone and is fixed to the edge of the second baffle 122 by adhesive. The height of the flexible flange 122A can be slightly higher than the axial distance between the second baffle 122 and the first baffle 112. In this way, when the drive assembly 13 drives the movable baffle assembly 12 to rotate, the flexible flange 122A of the second baffle 122 can overcome the friction resistance between it and the first baffle 112 and enter the gap between two adjacent first baffles 112, effectively blocking air from passing through the gap, thereby combing the hub turbulence, reducing the vehicle wind resistance, suppressing noise, and reducing energy consumption.

[0055] Optionally, the number of the first baffles 112 is any one of four, six, and eight, and the number of the second baffles 122 is the same as the number of the first baffles 112. Figure 1 , 2 As shown, the number of the first baffles 112 and the second baffles 122 is four, and the driving assembly 13 drives the movable baffle assembly 12 to rotate 45 degrees so that the second baffle 122 opens or closes the gap between two adjacent first baffles 112 .

[0056] Furthermore, the hub cover 1 also includes a controller 15 , which is connected to the bracket 113 , and the controller 15 is electrically connected to the driving component 13 and the speed sensing component 14 through a wiring harness.

[0057] The controller 15 generally consists of a microprocessor and a drive module. Specifically, by setting the speed value in the microprocessor, the microprocessor sends a control signal, and the drive module transmits the signal to the stepper motor, the precise control of the stepper motor can be achieved, ensuring that the stepper motor rotates according to the set logic. At the same time, through the feedback mechanism, the angle information of the rotation is fed back, so that the controller 15 can perform angle compensation, thereby improving the control accuracy. The controller 15 has high-precision and high-precision performance, and can achieve very precise angle control; secondly, the controller 15 has the advantages of fast response speed and low noise, which can meet the control requirements of the hub cover 1; thirdly, the controller 15 can achieve real-time monitoring and feedback of the angle, so that problems can be discovered and repaired in time, improving the stability and reliability of the system. Finally, the controller 15 is independently set and is not affected by the vehicle's own state, and has better anti-interference characteristics.

[0058] Furthermore, the hub cover 1 further includes a power supply 16, which is disposed on the bracket 113 and is used to supply power to the drive assembly 13, the speed sensing assembly 14 and the controller 15. The power supply 16 can supply power to the drive assembly 13, the speed sensing assembly 14 and the controller 15, further realizing independent control without being affected by the vehicle's own state such as wheel slippage.

[0059] In addition, an embodiment of the present application also provides a vehicle, comprising the wheel as described above.

[0060] The wheel hub cover 1 adopts a power supply 16, a speed sensing component 14, a driving component 13, a controller 15, a fixed baffle component and a movable baffle component to form a complete system integrating power supply, sensing, control and execution. It can not only accurately trigger the movement of the second baffle 122 according to the vehicle speed, but also the overall operation of the device will not be affected by interference factors such as wheel slippage. It can accurately adjust the position of the second baffle 122 relative to the first baffle 112 based on the current speed of the vehicle, providing a guarantee for the active wheel hub cover 1 to reduce wind resistance. Therefore, the vehicle can not only actively adjust the wind resistance of the wheel hub according to the needs under different states, reduce the wind resistance of the wheel hub, reduce the fuel consumption of the vehicle, and improve the comfort in the vehicle, but also have the advantages of low cost of transformation, enhance applicability, simplify system processing logic, and facilitate promotion.

[0061] It can be understood that the vehicles in the embodiments of the present application can be all vehicles with mobility, including vehicles with automatic driving or intelligent driving, such as vehicles with manned functions (sedans, buses, large buses, minibuses, etc.), vehicles with cargo functions (ordinary trucks, vans, trailers, closed trucks, tank trucks, flatbed trucks, container trucks, dump trucks, trucks with special structures), special vehicles (logistics distribution vehicles, patrol cars, cranes, cranes, excavators, bulldozers, forklifts, rollers, loaders, off-road engineering vehicles, armored engineering vehicles, sewage treatment vehicles), vehicles with entertainment functions (entertainment vehicles, amusement park automatic driving devices, balance vehicles, etc.), rescue vehicles (such as fire trucks, ambulances, power repair vehicles, engineering rescue vehicles, etc.), etc.

[0062] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0063] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hub cover, applied to a wheel hub, characterized in that: The hub cover comprises: A fixed baffle assembly, comprising a first fixed portion coaxially arranged with the hub and a plurality of first baffles spaced apart along a circumferential direction of the first fixed portion; A driving assembly connected to the first fixing portion; a movable baffle assembly, arranged on a side of the fixed baffle assembly away from the wheel hub, the movable baffle assembly comprising a second fixing portion and a plurality of second baffles spaced apart along a circumferential direction of the second fixing portion, the second fixing portion being connected to an output end of the driving assembly; and A speed sensing assembly for detecting the speed of the wheels; When the wheel speed is greater than the vehicle speed threshold, the drive assembly drives the movable baffle assembly to rotate so that the second baffle covers the gap between two adjacent first baffles; when the wheel speed is less than or equal to the vehicle speed threshold, the drive assembly drives the movable baffle assembly to rotate in the opposite direction so that the second baffle opens the gap between two adjacent first baffles.

2. The hub cover according to claim 1, characterized in that: The speed sensing component comprises a Hall sensor and a magnet. The Hall sensor is arranged on the end face of the rotating shaft of the hub. The magnet is arranged on the first fixing portion, and the Hall sensor and the magnet are arranged opposite to each other.

3. The hub cover according to claim 2, characterized in that: The magnet is a circular ring structure with a notch, the orthographic projection of the Hall sensor on the first fixing part is located on the magnet, and the Hall sensor sends an electrical signal when it corresponds to the notch.

4. The hub cover according to claim 2, characterized in that: The first fixing part is a column with a hollow interior, the inner wall of the first fixing part is provided with a bracket, and the magnet and the driving component are arranged on the bracket.

5. The hub cover according to claim 4, characterized in that: The driving assembly includes a stepper motor or a stepper motor and a reducer connected to the output shaft of the stepper motor. The output shaft of the stepper motor or the reducer extends from the first fixing part and is coaxially connected to the second fixing part.

6. The hub cap according to claim 1, characterized in that: A flexible flange extending toward the hub is disposed at the edge of the second baffle plate, and the second baffle plate covers a gap between two adjacent first baffle plates through the flexible flange.

7. The hub cover according to claim 4, characterized in that: It also includes a controller, which is connected to the bracket, and the controller is electrically connected to the driving component and the speed sensing component through a wiring harness.

8. The hub cover according to claim 7, characterized in that: It also includes a power supply, which is arranged on the bracket and is used to supply power to the driving component, the speed sensing component and the controller.

9. A wheel, characterized in that: include: Wheel hub; and The hub cover according to any one of claims 1 to 8, wherein the hub cover is detachably connected to the wheel hub via a plurality of first baffles.

10. A vehicle, characterized in that: Comprising a wheel as claimed in claim 9.

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