CN210490669U

CN210490669U - Motor capable of dynamically displaying patterns or characters, wheel and electric vehicle

Info

Publication number: CN210490669U
Application number: CN201821373782.3U
Authority: CN
Inventors: 臧传美
Original assignee: Zhejiang Aerlang Technology Co Ltd
Current assignee: Zhejiang Aerlang Technology Co Ltd
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2020-05-08
Anticipated expiration: 2028-08-24

Abstract

The utility model relates to a motor, wheel and electric motor car that can dynamic display pattern or characters, a motor that can dynamic display pattern or characters, include: the display device is arranged on the rotor and used for displaying patterns or/and characters, when the motor is powered on, the rotor rotates relative to the stator, and the display device rotates along with the rotor and displays the patterns or/and the characters; the display device is arranged along the radial direction of the rotor. The utility model discloses the structure is ingenious, and display device sets up along the radial direction of rotor, and accessible motor demonstrates the great pattern of size or characters.

Description

Motor capable of dynamically displaying patterns or characters, wheel and electric vehicle

Technical Field

The utility model relates to a motor, wheel and electric motor car that can dynamic display pattern or characters.

Background

At present, electric vehicles, such as balance cars, scooters and the like, have two types of motors in wheels, one type is a purely mechanical motor, and no display is provided in the process of working and rotating, and the type is generally called as a purely mechanical motor; the second is accompanied by a light display during the work rotation, which is mainly used for prompting information and lighting during the riding.

The above two types can realize the rotation control function, but both have disadvantages.

(1) The pure mechanical motor has no light effect, is used at night, and has no safety prompting function.

(2) The motor with the LED (light emitting diode) lamp beads has a light emitting effect, but the effect is not ideal, the display is single, and the prompting of diversification and various patterns or characters cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a motor, wheel and electric motor car that can dynamic display pattern or characters, under the motor rotation state, under the wheel rotation state promptly, pivoted motor can demonstrate pattern or characters, can effectively solve the problem among the background art.

The utility model discloses a realize through following technical scheme:

a motor capable of dynamically displaying patterns or characters, comprising: the display device is arranged on the rotor and used for displaying patterns or/and characters, when the motor is powered on, the rotor rotates relative to the stator, and the display device rotates along with the rotor and displays the patterns or/and the characters; the display device is arranged along the radial direction of the rotor.

By adopting the technical scheme, the display device is skillfully arranged on the motor, the display device in a rotating state displays required patterns or/and characters by utilizing the rotation of the rotor of the motor relative to the stator, and the display device arranged along the radial direction of the rotor can enable the size of the displayed patterns or characters to be larger.

As a further improvement, the display device comprises a LED lamp strip, and a plurality of LED lamp beads are arranged on the LED lamp strip. By adopting the technical scheme, the patterns or characters displayed can be clearer and controllable due to the arrangement of the LED lamp beads, the displayed size is larger, and the patterns or characters can be displayed by changing the brightness and the color of each lamp bead on the LED lamp strip in a rotating state.

As a further improvement, the LED light bar passes through the center of rotation of the rotor, and the edges of the two ends of the LED light bar are close to the outer edge of the rotor. By adopting the technical scheme, one or more LED light bars can be arranged, and one LED light bar can penetrate through the rotation center of the front end cover; the LED lamp strips are uniformly distributed on the front end cover, each LED lamp strip is arranged along the radial direction of the rotor, one end of each LED lamp strip is close to the rotation center of the rotor, and the other end of each LED lamp strip extends to the edge of the rotor, so that patterns or characters to be displayed can be clearer, and the size of each LED lamp strip is larger; the plurality of LED lamp strips can also penetrate through the rotating center of the rotor, and two ends of the LED lamp strips extend towards the edge of the rotor.

As a further improvement, the one end of the LED light bar is close to the center of rotation of the rotor, and the other end extends to the outer edge of the rotor and is close to the outer edge of the rotor. Through adopting above-mentioned technical scheme, LED lamp strip can follow the radial direction setting of rotor, and one end is close to the rotation center of rotor, and the other end extends to the edge of rotor, can make the pattern or the characters that need show more clear, and the size is also bigger.

As a further improvement, the LED light bar is evenly distributed on the rotor. Through adopting above-mentioned technical scheme, many LED lamp strip equipartitions are on the rotor, and every LED lamp strip all sets up along the radial direction of rotor, can make the pattern or the characters that need show more clear, and the size is also bigger.

As a further improvement of the present invention, the present invention further comprises a first induction coil mounted on the rotor, a second induction coil mounted on the stator, the first induction coil being connected to the display device, the second induction coil being connected to a power supply; when the rotor rotates relative to the stator, the first induction coil and the second induction coil rotate relatively, and current is generated in the first induction coil to supply power to the display device. By adopting the technical scheme, the display device is skillfully arranged on the motor, the rotation of the rotor of the motor relative to the stator is utilized, meanwhile, the interconversion between the first induction coil and the magnet is utilized, the second induction coil is connected to the power supply while the first induction coil and the second induction coil rotate mutually, the first induction coil is connected to the display device, the first induction coil generates current and supplies power to the display device, and the display device in a rotating state displays required patterns or/and characters.

As a further improvement of the present invention, the display device further comprises a solar cell connected to the display device. Through adopting above-mentioned technical scheme, display device accessible solar cell power supply then need not to install first induction coil and second induction coil for display device structure is more compact reasonable.

As a further improvement, each LED lamp bead on each LED lamp strip is installed on a circuit board, and the circuit board is provided with a micro control unit for controlling the on/off of each LED lamp bead. By adopting the technical scheme, the lamp beads on the LED lamp strip in the rotating state can display required patterns or/and characters under the control of the micro control unit.

As a further improvement of the utility model, the rotor includes front end housing and rear end cap, stator fixed mounting is in a shaft, the rear end cap rotates to be installed in the shaft, the stator is in the space that forms after front end housing and the rear end cap lid close, display device install in on the front end cap. By adopting the technical scheme, the rotor and the stator relatively rotate more smoothly, and the display device is arranged on the front end cover, so that displayed patterns or characters can be more clearly seen.

As a further improvement, the front end cover is a light-transmitting member, and the display device is installed on the inner side surface of the front end cover. By adopting the technical scheme, the front end cover is a light-transmitting part, so that light rays of the display device can be transmitted out of the front end cover for being observed by human eyes.

As a further improvement of the present invention, the rotor further includes a sensing unit for sensing angle information, position information, or speed information of the display device on the rotor. By adopting the technical scheme, the sensing unit senses the angle information/position information/speed information of the LED lamp strip of the display device and feeds back the angle information/position information/speed information to the micro control unit, so that the change frequency of the LED lamp strip can be controlled according to the rotating speed of the motor, and patterns or characters can be displayed more clearly.

As a further improvement of the present invention, the sensing unit includes a transmitter mounted on the stator and a receiver mounted on the rotor. By adopting the technical scheme, the transmitting device can continuously transmit signals, the receiving device can receive the signals and feed the signals back to the micro control unit on the circuit board, so that the angle, the position or the speed of the LED lamp strip can be monitored, and the receiving device can be in wired or wireless connection with the micro control unit on the circuit board.

As a further improvement of the present invention, the transmitting device and the receiving device are located at the same circumferential position. By adopting the technical scheme, the transmitting device and the receiving device are located at the same circumferential position, so that the receiving device can timely and effectively receive the signal transmitted by the transmitting device when the receiving device rotates for a circle and coincides with the position of the transmitting device.

The wheel comprises the motor capable of displaying patterns or characters, wherein a tire is mounted on the periphery of the rotor. By adopting the technical scheme, the motor is arranged on the wheel, and the wheel can display the patterns or characters required to be displayed when rotating.

The electric vehicle comprises the wheel in the scheme, and the wheel shaft of the wheel is fixedly arranged on the vehicle body of the electric vehicle. Through adopting above-mentioned technical scheme, this motor of electric motor car installation and wheel can show pattern or characters, can play the effect of wakening to people around, also can improve the entertainment function simultaneously.

Compared with the prior art, the utility model discloses the beneficial part of scheme has at least: the motor has the advantages that the structure is ingenious, on the basis that the original structure of the motor is not changed, the motor in a rotating state can display required patterns and characters skillfully, on one hand, the warning effect is achieved, on the other hand, the entertainment performance can be improved, in addition, certain advertising effect is achieved, and the popularization and the application are convenient.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of a motor and a wheel capable of dynamically displaying patterns or characters according to an embodiment of the present invention.

Fig. 2 is a schematic front view of a motor and a wheel capable of dynamically displaying patterns or characters according to an embodiment of the present invention.

Fig. 3 is a schematic view of a cross-sectional structure a-a of a motor and a wheel capable of dynamically displaying patterns or characters according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional structure view of a motor and a wheel capable of dynamically displaying patterns or characters according to another embodiment of the present invention.

Fig. 5 is a schematic front view of a motor and a wheel capable of dynamically displaying patterns or characters according to another embodiment of the present invention.

Fig. 6 is a schematic front view of a motor and a wheel capable of dynamically displaying patterns or characters according to another embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a motor and a wheel capable of displaying patterns or characters according to another embodiment of the present invention.

In the figure: the automobile wheel hub comprises a tire 11, a rear end cover 12, rotor magnetic steel 13, a stator 14, a wheel shaft 15, a front end cover 16, a bearing 17, a first induction coil 18, an LED lamp bar 19, a second induction coil 20, a receiving device 21, a transmitting device 22, a second fastening hole 121, a groove surface 151, a through hole 152 and a first fastening hole 161.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following buckling drawings and preferred embodiments are described in detail below with reference to the following detailed description of the embodiments, structures, features and effects of the present invention.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Example 1

A motor capable of dynamically displaying patterns or characters is disclosed, please refer to fig. 1 to 3, and comprises a stator 14, a front end cover 16, a rear end cover 12, rotor magnetic steel 13, a first induction coil 18, a second induction coil 20, an LED lamp strip 19, a sensing unit and a wheel axle 15, wherein the wheel axle 15 is a fixed shaft, the rear end cover 12 is installed at one end of the rear side of the wheel axle 15 through a bearing, the rear end of the wheel axle 15 penetrates through the rear end cover 12, the rear end cover 12 is provided with a through hole for the wheel axle 15 to penetrate through at a corresponding position, namely, the wheel axle 15 is sleeved with the bearing, the outer surface of the wheel axle 15 is in interference connection with the inner surface of a bearing inner ring, the rear end cover 12 is sleeved on the outer surface of the bearing outer ring, the outer surface of the bearing outer ring; the front end cover 16 is installed at one end of the front side of the wheel shaft 15 through another bearing 17, the end of the front side of the wheel shaft 15 does not penetrate through the front end cover 16, namely the bearing 17 is sleeved on the wheel shaft 15, the outer surface of the wheel shaft 15 is in interference connection with the inner surface of the bearing inner ring, the front end cover 16 is sleeved on the outer surface of the bearing outer ring, the outer surface of the bearing outer ring is in interference connection with the front end cover 16, the front end cover 16 is provided with an installation cavity for installing the bearing at a corresponding position, the rotor magnetic steel 13 is installed on the inner side surface of the front end cover 16 and can be fixed with the front. Second induction coil 20 is wireless transmitting coil, is connected with the power, and when first induction coil and second induction coil relatively rotated, through the electricity and produce the magnetic induction principle, will flow through the electric current of second induction coil to the mode of electromagnetism is launched away, and first induction coil 18 is wireless receiving coil, through the magnetism and produce the electric principle, receives the electromagnetism of second induction coil in order to convert the electric current into, and first induction coil is connected to the circuit board power supply to LED lamp strip.

The front end cover 16 and the rear end cover 12 form a rotor that is rotatable about a stator.

The front end cover 16 and the rear end cover 12 are covered inside and provided with an accommodating cavity for accommodating a stator 14 and the like, the front end cover 16 and the rear end cover 12 are covered at the position, the front end cover 16 is provided with a first fastening hole 161, the rear end cover 12 is provided with a second fastening hole 121, the first fastening hole 161 and the second fastening hole 121 are combined and then can be fastened and fixed into a whole by a fastener, in the embodiment, the first fastening hole 161 is arranged on the rear side surface of the front end cover and is a blind hole, and the second fastening hole is a through hole; in other embodiments, the second fastening hole can be opened on the front side surface of the rear end cover and is a blind hole, the first fastening hole is a through hole, the purpose of fixing the end cover can be achieved, and the related fastening holes can be arranged according to actual needs. The stator 14 is arranged on the wheel axle 15, the stator 14 is provided with a coil winding, a second induction coil 20 and a transmitting device 22 in the sensing unit are arranged on the surface of one side of the stator close to the front end cover 16, the second induction coil 20 is arranged around the wheel axle 15 by taking the wheel axle 15 as the center, and the transmitting device 22 is positioned at the outer edge of the stator 14; specifically, the second induction coil 20 may be fixed to the inner edge of the front end surface of the coil winding with a nylon band, or the second induction coil 20 may be fixed to the stator 14 with a heat resistant adhesive glue; adhering the emitter 22 to the outer edge of the stator 14 with a heat-resistant adhesive; a first induction coil 18 and a receiving device 21 in the sensing unit are arranged on one side surface of the front end cover 16 close to the stator (namely, the inner side surface of the front end cover), the first induction coil 18 is arranged around the wheel axle 15 by taking the wheel axle 15 as the center, the height of the first induction coil is aligned with that of the second induction coil 20, and the height of the receiving device 21 is aligned with that of the transmitting device 22. Specifically, a heat-resistant adhesive glue is respectively coated on one side of the first induction coil 18 and the inner side surface of the front end cover 16, so that the first induction coil 18 is firmly adhered to the inner side surface of the front end cover 16; the receiving means 21 may also be glued to the outer edge of the front end cap 16 with a heat resistant glue.

The LED light bar 19 is adhered to the outer surface of the front end cover 16, and of course, other light-transmitting components may be covered on the LED light bar to prevent water or coat waterproof glue, etc., the LED light bar has a plurality of LED light beads, the LED light beads may be RGB (red, green, blue) light beads, the LED light bar may be RGB light beads, the plurality of light beads are mounted on a strip-shaped circuit board, the circuit board has a Micro Control Unit (MCU), which is also called a Single Chip Microcomputer (Single Chip Microcomputer) or a Single Chip Microcomputer, and the frequency and specification of a Central Processing Unit (CPU) are appropriately reduced, and peripheral interfaces such as a memory (memory), a counter (Timer), a USB, a/D conversion, UART, PLC, DMA, and the like, even an LCD driving circuit is integrated on a Single Chip to form a Chip-level computer, so as to perform different combination control for different application occasions. In this embodiment, please refer to fig. 2, one LED light bar passes through the center of the front end cover 16, in other embodiments, referring to fig. 5, a plurality of LED light bars may be uniformly distributed on the front end cover 16, each LED light bar is arranged along the radial direction of the front end cover 16, or one end of each LED light bar is close to the rotation center of the front end cover 16, the other end of each LED light bar extends to the peripheral edge of the front end cover 16, the LED light bars are arranged in an inclined manner, the length direction of each LED light bar does not pass through the rotation center of the front end cover, or, referring to fig. 6, two LED light bars pass through the center of the front end cover 16, and the two ends of each LED light bar extend to the edge of the front end cover.

The axle 15 is a hollow axle, and has a through hole 152 for the wire harness to pass through, and the axle 15 passes through one end of the rear end cover 12 and is provided with a groove surface 151 for fixing with the body of the electric vehicle.

Referring to fig. 1, after the motor including the above scheme is covered by the front end cover 16 and the rear end cover 12, the tire 11 is mounted on the periphery of the front end cover 16 and the rear end cover 12.

An electric vehicle can be an electric balance car, a scooter and the like, and the balance car in the embodiment comprises the wheels, and a wheel shaft 15 is fixedly arranged on a car body of the balance car. When the wheels of the balance car rotate, the LED lamp bars display patterns or characters required by a user.

The specific working process is as follows:

when the motor control board is electrified for the motor, the motor is rotated, namely the stator 14 does not rotate, the tire 11, the front end cover 16 and the rear end cover 12 rotate, the corresponding RGB lamp strips can also rotate at the moment, the first induction coil and the second induction coil mutually induce electricity to supply power for the circuit board of the RGB lamp strips, after the voltage of the circuit board of the RGB lamp strips is stabilized, an MCU (micro control unit, which can be called as a single chip microcomputer) on the circuit board enters a working mode, the on-off and the color of each LED lamp bead are adjusted at different moments, due to the phenomenon of visual persistence of human eyes, the rotated RGB lamp strips can present various required patterns or characters, the required patterns or characters can be stored in a storage unit on the circuit board, and the storage unit can also be integrated on the MCU.

The display principle is as follows:

when the motor rotates, the RGB light bars also rotate, the MCU on the light bars determines the angles or positions of the RGB light bars according to the values detected by the sensing units, if the RGB light bars are radially distributed along the front end cover, the length direction of the RGB light bars passes through the rotation center, the receiving device 21 in the sensing units can be located in the length direction of the RGB light bars, the transmitting device 22 in the sensing units continuously transmits signals to the receiving device 22, when the positions of the receiving device 21 and the transmitting device 22 coincide (i.e., coincide and align in the height direction), the receiving device 22 receives the signals and feeds the signals back to the MCU on the circuit board of the RGB light bars, the signals fed back by the continuously rotating RGB light bars form periodic pulse signals, and the MCU calculates any or all information in the rotation speed/angle/position information of the RGB light bars according to the periodic pulse signals.

Specifically, taking the angle of the RGB light bar as an example, the angle value = (360 ° × detection value of the sensing unit)/N (360 degrees is divided into N equal parts, the higher the N value is, the clearer the image will be, in this embodiment, 360 degrees is divided into 3600 equal parts, that is, N = 3600). When the included angle between the length direction of the RGB lamp strip and the upper half vertical line of the rotation center is 45 degrees, the value detected by the sensing unit is 450 degrees, and when the included angle between the length direction of the RGB lamp strip and the upper half vertical line of the rotation center is 90 degrees, the detection value of the sensing unit is 900 degrees, namely the angle value of the RGB lamp strip can be known according to the detection value of the sensing unit.

According to the angle value, the MCU can correspond the image information to each RGB lamp bead, controls the on/off and the color of each RGB lamp, and after the rotating speed of the motor reaches a certain value, a complete picture is visually presented due to the phenomenon of visual persistence of human eyes, and the presented pattern or character is fixed in angle or position and cannot rotate along with the rotation of the motor; and the faster the motor rotating speed, the higher the refresh rate and the better the visual effect. The circuit board of the RGB lamp strip can be provided with Bluetooth or WiFi and other wireless transmission units, so that the wireless real-time transmission of pictures, texts and videos is realized, and the dynamic switching of patterns on the motor is realized. Similarly, the pattern or text information on the mobile phone end can be transmitted to the MCU or the storage unit on the circuit board through the wireless transmission unit, so that the MCU can call the pattern or text to be displayed. When the wheel stops rotating, namely the RGB lamp strip stops rotating, the MCU (micro control unit) detects a signal that the wheel stops rotating through the sensing unit, and after a certain time period is reached, the micro control unit cuts off the power supply of the battery so as to save the power consumption.

The phenomenon of persistence of vision of human eyes means that when human eyes observe a scene, light signals are transmitted into brain nerves, a short time is needed, after the action of light is finished, a visual image does not disappear immediately, the residual vision is called 'afterimage', and the phenomenon of vision is called 'persistence of vision'. When the object moves rapidly, after the image seen by human eyes disappears, the human eyes can still keep the image of the image for about 0.1-0.4 second.

Each RGB lamp bead can correspond to image information in a complete pattern or character at different moments, RBG lamp beads with colors and capable of being continuously refreshed in the wheel rotating process of the balance car, and a 'back image' formed in human eyes can be displayed by the human eyes from a point to a line, from the line to a surface.

Example 2

In this embodiment, referring to fig. 4, the front end cover 16 is a transparent component, which is used for transmitting light of an LED lamp bead on the LED lamp strip, the LED lamp strip 19 is adhered to an inner side surface of the front end cover 16, the first induction coil 18 is adhered to an inner side surface of a circuit board of the LED lamp strip, the receiving device 21 is also adhered to an inner side surface of the circuit board of the LED lamp strip, a height of the first induction coil is as described in embodiment 1 and is aligned with a height of the second induction coil, and other structures and principles are as described in embodiment 1 and are not described again.

Example 3

Referring to fig. 7, in the embodiment, the front end cover 16 is a transparent component, which allows light to pass through an LED lamp bead on the LED lamp strip, the LED lamp strip 19 is adhered to an inner side surface of the front end cover 16, the first induction coil 18 is adhered to an inner side surface of a circuit board of the LED lamp strip, the front end cover 16 is not directly connected to the wheel axle 15, and a bearing between the front end cover and the wheel axle 15 is eliminated. Other structures and principles are as described in embodiment 1 and will not be described again.

Example 4

In this embodiment, the LED light bar 19 is adhered to the outer surface of the front cover 16, the first induction coil 18 is adhered to the inner surface of the front cover, the front cover 16 is not directly connected to the wheel axle 15, and a bearing is omitted, so that both edges of the LED light bar extend to the edge of the front cover, thereby ensuring that the pattern and the size to be displayed are maximized, the rear cover 12 is mounted on the wheel axle 15 through the bearing 17, and the front cover 16 is connected to the rear cover 12 through a fastener. Other structures and principles are as described in embodiment 1 and will not be described again.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, changes and modifications of the above embodiments that do not depart from the technical scope of the present invention are within the scope of the present invention.

Claims

1. A motor capable of dynamically displaying patterns or characters is characterized by comprising: the motor comprises a stator (14), a rotor and a display device, wherein the rotor rotates relative to the stator (14), the display device is arranged on the rotor and used for displaying patterns or/and characters, when the motor is powered on, the rotor rotates relative to the stator (14), and the display device rotates along with the rotor and displays the patterns or/and characters; the display device is arranged along the radial direction of the rotor.

2. The motor capable of dynamically displaying patterns or characters according to claim 1, wherein the display device comprises an LED light bar (19) having a plurality of LED light beads thereon.

3. The motor capable of dynamically displaying patterns or characters as claimed in claim 2, wherein the LED light bars (19) pass through the rotation center of the rotor, and the edges of the two ends of the LED light bars are close to the outer edge of the rotor.

4. The motor capable of dynamically displaying patterns or characters as claimed in claim 2, wherein one end of the LED lamp strip (19) is close to the rotation center of the rotor, and the other end extends towards the outer edge of the rotor and is close to the outer edge of the rotor.

5. The motor capable of dynamically displaying patterns or characters as claimed in claim 2, wherein the LED light bars (19) are uniformly distributed on the rotor.

6. The motor capable of dynamically displaying patterns or characters as claimed in claim 1, 2, 3, 4 or 5, further comprising a first induction coil (18) installed on the rotor, a second induction coil (20) installed on the stator (14), wherein the first induction coil (18) is connected with the display device, and the second induction coil is connected with a power supply; when the rotor rotates relative to the stator, the first induction coil (18) and the second induction coil (20) rotate relatively, and current is generated in the first induction coil (18) to supply power to the display device.

7. The motor for dynamically displaying patterns or characters as claimed in claim 1, 2, 3, 4 or 5, further comprising a solar cell connected to said display device.

8. The motor for dynamically displaying patterns or characters as claimed in claim 2, 3, 4 or 5, wherein each LED lamp bead on each LED lamp strip (19) is mounted on a circuit board, and a micro control unit for controlling on and off of each LED lamp bead is mounted on the circuit board.

9. The motor for dynamically displaying patterns or characters as claimed in claim 1 or 2 or 3 or 4 or 5, wherein said rotor comprises a front cover (16) and a rear cover (12), said stator (14) is fixedly mounted on a wheel axle (15), said rear cover is rotatably mounted on the wheel axle (15), said stator (14) is located in a space formed after the front cover (16) and the rear cover (12) are closed, and said display device is mounted on said front cover (16).

10. The motor capable of dynamically displaying patterns or characters as claimed in claim 9, wherein the front cover is a light-transmitting member, and the display device is mounted on an inner side surface of the front cover (16).

11. The motor capable of dynamically displaying patterns or characters as claimed in claim 1, 2, 3, 4, 5 or 10, further comprising a sensing unit for sensing angle information or position information or speed information of the display device on the rotor.

12. A motor for dynamically displaying graphics or text as claimed in claim 11, wherein said sensing unit comprises a transmitter (22) mounted on the stator (14) and a receiver (21) mounted on the rotor.

13. The motor for displaying patterns or characters dynamically as claimed in claim 12, wherein said transmitter and receiver are located at the same circumferential position.

14. Wheel, characterized in that it comprises an electric machine displaying patterns or words according to any one of claims 1-13, the periphery of the rotor being fitted with a tyre (11).

15. Electric vehicle, comprising a wheel according to claim 14, the axle (15) of which is fixedly mounted on the body of the electric vehicle.