Electric hub

Abstract

The utility model relates to an electric hub. The wheel comprises a driving wheel shell, a driven wheel shell connected to the driving wheel shell, a hub shaft penetrating through the driving wheel shell and the driven wheel shell, a containing space defined by the inner wall of the driving wheel shell and the inner wall of the driven wheel shell, a driving assembly arranged in the containing space and a heat dissipation mechanism used for conducting heat dissipation on the containing space. The driving assembly comprises a driving motor arranged on one side of the hub shaft and a transmission assembly arranged in the containing space, and the driving motor drives the driving wheel shell to rotate around the hub shaft through the transmission assembly. According to the utility model, the hub is driven by the internal driving motor through the transmission assembly to realize the electric rotation of the hub on the hub shaft. By means of the structural design, the hub and external parts can be assembled more stably and reliably, the coaxiality between the hub and the hub shaft is guaranteed, and therefore the balance and stability of rotation of the hub are improved. And meanwhile, a heat dissipation function is also achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an electric wheel hub. Background Art

[0002] The wheel hub motor technology is also known as the in-wheel motor technology. Its biggest feature is that the power device, transmission device and brake device are integrated into the wheel hub, which greatly simplifies the mechanical part of the electric vehicle. In the patent application number 201810099024.5 and the patent name of a servo wheel hub motor, it is disclosed that the rotor and stator and other components of the motor are installed in the wheel hub, and the output shaft of the motor only extends on one side of the wheel hub and connects to the outside. The patent has the following defects: 1. The main shaft of the wheel hub is connected to the outside only at one end, which causes the contour to be subjected to force on only one side when rotating, making the force of the wheel hub uneven, which easily causes the wheel hub to shake during rotation, and the balance and stability of the wheel hub are poor. 2. The rotor and stator of the motor will easily heat up when working in the wheel hub for a long time, which may cause the wheel hub electronics to spontaneously combust, posing a safety hazard. Therefore, the defects are very obvious, and a solution is urgently needed. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide an electric hub in which a motor is built into a hub, a hub shaft can pass through both sides of the hub, and the hub has a heat dissipation function.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An electric wheel hub comprises a driving wheel housing, a driven wheel housing connected to the driving wheel housing, a hub shaft penetrating the driving wheel housing and the driven wheel housing, a containing space surrounded by the inner walls of the driving wheel housing and the driven wheel housing, a driving component arranged in the containing space, and a heat dissipation mechanism for dissipating heat from the containing space, wherein the driving component comprises a driving motor installed on one side of the hub shaft and a transmission component arranged in the containing space, and the driving motor drives the driving wheel housing to rotate around the hub shaft through the transmission component.

[0006] Furthermore, the heat dissipation structure includes exhaust holes and air inlet holes arranged on the driving wheel housing and / or the driven wheel housing, and the exhaust holes and the air inlet holes are both connected to the accommodating space.

[0007] Furthermore, the exhaust hole and the air inlet hole are arranged on the side wall of the driven wheel housing, and an air guide block is arranged on one side of the exhaust hole. One side of the air guide block is connected to the side wall of the exhaust hole, and the other side of the air guide block protrudes into the accommodating space and is arranged obliquely.

[0008] Furthermore, the distance between the center of the exhaust hole and the center of the hub shaft is greater than the distance between the center of the intake hole and the center of the hub shaft.

[0009] Furthermore, the transmission assembly includes a ring gear connected to the driving wheel housing, a first transmission gear arranged on the output shaft of the driving motor, a gear shaft arranged in the accommodating space, a second transmission gear arranged on the gear shaft, and a third transmission gear arranged on the gear shaft, the first transmission gear is meshed with the second transmission gear, and the third transmission gear is meshed with the ring gear.

[0010] Furthermore, the electric wheel hub also includes a dustproof mechanism for preventing dust from entering the transmission assembly; the dustproof mechanism includes a first dustproof cover and a second dustproof cover arranged in the accommodating space, the first dustproof cover is used to cover the output shaft of the driving motor, the first transmission gear, the second transmission gear, the third transmission gear and the upper part of the ring gear, and the second dustproof cover is used to cover the lower part of the ring gear.

[0011] Furthermore, the first dust cover, the second dust cover and the driving wheel housing are arranged to form a dustproof space, the driving motor is located outside the dustproof space, and the output end and the transmission assembly of the driving motor are located inside the dustproof space; a sealing member is arranged between the side edge of the first dust cover and the side edge of the second dust cover and the inner wall of the driving wheel housing.

[0012] Furthermore, the electric wheel hub also includes a fixing seat arranged in the accommodating space and connected to the wheel hub shaft, the fixing seat is provided with a sleeve matching the wheel hub shaft, the fixing seat is provided with a motor mounting cavity for installing and fixing the driving motor, the fixing seat is provided with an axial hole for installing and fixing the gear shaft; a vent is provided at the top of the motor mounting cavity; the first dust cover is connected to the top of the fixing seat, the first dust cover is provided with a gear accommodating cavity for accommodating the first transmission gear, the second transmission gear, the third transmission gear and the gear shaft; the second dust cover is connected to the fixing seat and is located below the first dust cover.

[0013] Furthermore, the electric wheel hub also includes a light-emitting component, which includes a light-emitting part, a circuit board, a coil and a circular ring-shaped magnetic core, and the circuit board and the coil are both annular; the circular ring-shaped magnetic core is fixedly mounted on the hub shaft, the circuit board and the coil are arranged on the driving wheel housing, the circular ring-shaped magnetic core is located on the inner side of the circuit board, and the coil is arranged on the inner side of the circuit board and between the circuit board and the circular ring-shaped magnetic core; the light-emitting part is arranged on the driving wheel housing and is electrically connected to the circuit board.

[0014] Beneficial effects of the utility model: the hub shaft of the utility model runs through both sides of the driving wheel shell and the driven wheel shell, the driving motor is arranged on one side of the hub shaft, and the output shaft of the driving motor drives the driving wheel shell and the driven wheel shell to rotate around the hub shaft through the transmission assembly, thereby realizing the function of the electric hub. The difference between the design of this structure and the traditional hub motor structure is that: its hub shaft can run through both sides of the hub, and the hub shaft is used as a fixed shaft connected to the outside, not a driving shaft. On the one hand, the design of this structure can solve the defect that the existing hub motor can only be connected to the outside on one side; on the other hand, the through-design of the hub shaft can effectively make the assembly of the hub and the external parts more stable and reliable, and also ensure the coaxiality between the hub and the hub shaft, thereby improving the balance and stability of the hub rotation. At the same time, the electric hub also has a heat dissipation mechanism that can discharge the heat in the hub, so that the temperature in the hub will not be too high, thereby improving the use stability of the electric hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 This is a schematic diagram of the decomposition structure of the utility model

[0017] Figure 3 It is a full cross-sectional view of the utility model.

[0018] Figure 4 It is a front view of the driven wheel housing of the utility model.

[0019] Figure 5 for Figure 4 Cross-sectional view along AA direction.

[0020] Figure 6 It is a schematic diagram of the structure of the utility model after the driven wheel housing is hidden.

[0021] Figure 7 It is a structural schematic diagram of the transmission assembly of the utility model.

[0022] Figure 8 It is a schematic diagram of the structure of the utility model after the driving wheel housing is hidden.

[0023] Fig. 9 It is a structural schematic diagram of the fixing seat of the utility model.

[0024] Fig.10 It is a schematic structural diagram of the second dust cover of the utility model.

[0025] Fig.11 It is a structural schematic diagram of the light-emitting component and the driving wheel housing of the utility model.

[0026] Fig.12 It is a structural schematic diagram of the first dust cover and the fixing seat of the utility model.

[0027] Description of reference numerals:

[0028] 1. Driving wheel housing; 2. Driven wheel housing; 3. Accommodation space; 4. Exhaust hole; 401. Air guide block; 5. Air inlet hole; 6. Driving motor; 7. Hub shaft; 8. Fixed seat; 801. Bushing; 802. Motor mounting cavity; 803. Shaft hole; 804. Ventilation hole; 9. Gear accommodating cavity; 10. Dustproof space; 11. Ring gear; 12. Third transmission gear; 13. Gear shaft; 14. First transmission gear; 15. Second transmission gear; 17. First dust cover; 18. Second dust cover; 181. Accommodation groove; 19. Light-emitting part; 20. Circuit board; 21. Accommodating cavity; 22. Tire; 23. Ring-shaped magnetic core; 24. Wire. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0030] like Figures 1 to 11 As shown, the utility model provides an electric wheel hub, which includes a driving wheel housing 1, a driven wheel housing 2 connected to the driving wheel housing 1, a hub shaft 7 penetrating the driving wheel housing 1 and the driven wheel housing 2, a receiving space 3 surrounded by the inner walls of the driving wheel housing 1 and the driven wheel housing 2, a driving component arranged in the receiving space 3, and a heat dissipation mechanism for dissipating heat from the receiving space 3, wherein the driving component includes a driving motor 6 installed on one side of the hub shaft 7 and a transmission component arranged in the receiving space 3, and the driving motor 6 drives the driving wheel housing 1 to rotate around the hub shaft 7 through the transmission component. The driving wheel housing 1 and the driven wheel housing 2 are combined together to form a wheel hub that rotates around the hub shaft 7, and tires 22 are installed on the outer circumferences of the driving wheel housing 1 and the driven wheel housing 2.

[0031] In the present technical solution, the hub shaft 7 runs through both sides of the driving wheel housing 1 and the driven wheel housing 2, and the driving motor 6 is arranged on one side of the hub shaft 7. The output shaft of the driving motor 6 drives the driving wheel housing 1 and the driven wheel housing 2 to rotate around the hub shaft 7 through the transmission assembly, thereby realizing the function of the electric hub. Preferably, the hub shaft 7 is coaxially arranged with the driving wheel housing 1 and the driven wheel housing 2. The difference between the design of this structure and the traditional electric hub structure is that its hub shaft 7 can run through both sides of the hub, and the hub shaft 7 is a fixed shaft connected to the outside, not a driving shaft. In practical applications, it is only necessary to fix the two ends of the hub shaft 7 with external parts, and drive the driving wheel housing 1 and the driven wheel housing 2 to rotate under the cooperation of the driving motor 6 and the transmission assembly, so as to realize the movement of external parts. On the one hand, the design of this structure can solve the defect that the existing hub motor can only be connected to the outside on one side; on the other hand, the through-design of the hub shaft 7 can effectively make the assembly of the hub and external parts more stable and reliable, and also ensure the coaxiality between the hub and the hub shaft 7, thereby improving the balance and stability of the hub rotation.

[0032] At the same time, in the technical solution, the electric wheel hub is also provided with a heat dissipation mechanism. Since the drive motor 6 is built into the wheel hub, the drive motor 6 will generate heat when working. When the heat in the wheel hub is too high, the drive motor 6 will burn out or even cause the wheel hub to self-ignite. Therefore, the heat dissipation mechanism of the electric wheel hub can discharge the heat in the wheel hub, so that the temperature in the wheel hub will not be too high, thereby improving the use stability of the electric wheel hub.

[0033] In this embodiment, if Figures 1 to 3 As shown, the heat dissipation structure includes an exhaust hole 4 and an air inlet hole 5 provided on the driving wheel housing 1 and / or the driven wheel housing 2, and the exhaust hole 4 and the air inlet hole 5 are both connected to the accommodating space 3. In practical applications, when the driving motor 6 is working, a large amount of heat will accumulate in the accommodating space 3. When the driving wheel housing 1 and the driven wheel housing 2 are working, the exhaust hole 4 and the air inlet hole 5 connected to the outside allow the accommodating space 3 to continuously take in and out air from the outside, thereby forming a circulating airflow, and bringing the heat in the accommodating space 3 out of the wheel hub, thereby achieving the effect of heat dissipation in the wheel hub, and avoiding the problem of excessive heat in the wheel hub causing the motor to burn out or the wheel hub to spontaneously combust.

[0034] In this embodiment, if Figures 3 to 5As shown, the exhaust hole 4 and the air inlet 5 are arranged on the side wall of the driven wheel housing 2, and an air guide block 401 is arranged on one side of the exhaust hole 4. One side of the air guide block 401 is connected to the side wall of the exhaust hole 4, and the other side of the air guide block 401 protrudes into the accommodating space 3 and is arranged obliquely. The design of the air guide block 401, on the one hand, when the driven wheel housing 2 rotates, the air guide block 401 forms a wind scraper in the accommodating space 3, and the hot air in the accommodating space 3 is hung out to the outside of the wheel hub through the exhaust hole 4; on the other hand, it also increases the exhaust volume and exhaust speed of the exhaust hole 4, thereby improving the heat dissipation efficiency. Its structural design is simple and compact, and the heat dissipation effect is good. In actual application, when the driven wheel housing 2 rotates, the airflow outside the driven wheel housing 2 will quickly flow out to the outside of the accommodating space 3 along the air guide block 401 of the exhaust hole 4, so that the heat of the accommodating space 3 is synchronously taken out, and the air pressure in the accommodating space 3 is caused to be lower than the external atmospheric pressure. Under the action of atmospheric pressure, the space can also quickly flow into the accommodating space 3 from the air inlet hole 5, thereby forming a circulating airflow in and out of the wheel hub.

[0035] Since the drive motor 6 itself has an exhaust and heat dissipation mechanism, the hot air flow discharged by the drive motor 6 into the accommodating space 3 will cause turbulent air flow in the accommodating space 3, and the exhaust holes 4 and the air inlet holes 5 of the driven wheel housing 2 are designed to form a circulating outward-flowing airflow in the accommodating space 3, so that the heat in the accommodating space 3 can be continuously discharged to the outside, thereby efficiently dissipating the heat.

[0036] As preferably, Figure 1 and Figure 4 As shown, the distance between the center of the exhaust hole 4 and the center of the hub shaft 7 is greater than the distance between the center of the air inlet 5 and the center of the hub shaft 7. The number of the air inlet 5 and the air inlet 5 are both multiple, and the multiple exhaust holes 4 are arranged in an array around the central circumference of the driven wheel shell 2, and the multiple exhaust holes 4 are arranged in an array around the central circumference of the driven wheel shell 2. The farther away from the center of the hub shaft 7, the faster the linear speed of the hub when it rotates. Therefore, by arranging the exhaust hole 4 at a position farther away from the center of the hub shaft 7, the air in the accommodating space 3 can be quickly discharged, so that a pressure difference is formed between the accommodating space 3 and the atmospheric pressure, so that the external gas can enter the accommodating space 3 through the air inlet 5, and a circulating airflow is formed in the accommodating space 3. The circulating airflow continuously brings in low-temperature gas and takes away high-temperature gas, thereby achieving the effect of heat dissipation.

[0037] In practical applications, since the upper and lower ends of the driving motor 6 are provided with air inlets, an air outlet is provided between the upper and lower ends of the driving motor 6, and an exhaust fan for cooling the driving motor 6 is provided in the air outlet; the hot air exhausted by the driving motor 6 will cause a turbulent airflow in the accommodating space 3. Therefore, the heat dissipation structure can convert the turbulent airflow in the accommodating space 3 into a stable circulating airflow, take the heat out of the wheel hub, and avoid excessive heat in the accommodating space 3.

[0038] In this technical solution, if Figure 2 and Figure 3 As shown, the transmission assembly includes a ring gear 11 connected to the driving wheel housing 1, a first transmission gear 14 arranged on the output shaft of the driving motor 6, a gear shaft 13 arranged in the accommodating space 3, a second transmission gear 15 rotatably arranged on the gear shaft 13, and a third transmission gear 12 rotatably arranged on the gear shaft 13, the second transmission gear 15 is connected to the third transmission gear 12, the first transmission gear 14 is meshed with the second transmission gear 15, and the third transmission gear 12 is meshed with the ring gear 11. Preferably, the axis of the ring gear 11 is parallel to the axis of the hub shaft 7, and the axis of the gear shaft 13 is parallel to the axis of the output shaft of the driving motor 6. The first transmission gear 14 and the second transmission gear 15 are driven by external gears, and the third transmission gear 12 and the ring gear 11 are driven by bevel gears. In practical applications, the driving motor 6 drives the first transmission gear 14 to rotate, the rotating first transmission gear 14 drives the second transmission gear 15 to rotate, the rotating second transmission gear 15 drives the third transmission gear 12 to rotate, the rotating gear shaft 13 drives the third transmission gear 12 to rotate, the rotating third transmission gear 12 drives the gear ring 11 and then drives the driving wheel housing 1 to rotate. The design of this structure is simple and compact, and the operation is stable and reliable.

[0039] In this technical solution, if Figure 2 and Figure 6 As shown, the electric wheel hub also includes a dustproof mechanism for dustproofing the transmission assembly; the dustproof mechanism includes a first dustproof cover 17 and a second dustproof cover 18 disposed in the accommodating space 3, the first dustproof cover 17 is used to cover the output shaft of the drive motor 6, the first transmission gear 14, the second transmission gear 15, the third transmission gear 12 and the upper part of the ring gear 11, and the second dustproof cover 18 is used to cover the lower part of the ring gear 11. The first dustproof cover 17 and the second dustproof cover 18 can block the external dust brought by the airflow in the accommodating space 3 and the dust discharged by the carbon brush in the drive motor 6, effectively protecting the efficient operation of the transmission assembly and improving the operating stability of the wheel hub.

[0040] As preferably, Fig.10As shown, the second dust cover 18 is provided with a receiving groove 181 for receiving the ring gear 11. When the second dust cover 18 is installed with the driving wheel housing 1, the receiving groove 181 can fully surround the lower part of the ring gear 11 for dust protection, ensuring that dust does not easily enter the ring gear 11.

[0041] In the technical solution, Figure 2 , Figure 6 and Fig. 9 As shown, the electric wheel hub also includes a fixing seat 8 disposed in the accommodating space 3 and connected to the wheel hub shaft 7, the first dust cover 17 and the second dust cover 18 are respectively mounted on the fixing seat 8; the fixing seat 8 is provided with a sleeve 801 matched with the wheel hub shaft 7, the fixing seat 8 is provided with a motor mounting cavity 802 for mounting and fixing the drive motor 6, the fixing seat 8 is provided with an axial hole 803 for mounting and fixing the gear shaft 13; the top of the motor mounting cavity 802 is provided with a vent hole 804. The fixing seat 8 is fixedly mounted on the wheel hub shaft 7 through the sleeve 801, and the drive motor 6 is fixedly mounted on the wheel hub shaft 7 through the motor mounting cavity 802 and the gear shaft 13 is fixedly mounted on the wheel hub shaft 7 through the axial hole 803, thereby the drive motor 6 and the transmission assembly can be stably fixed in the accommodating space 3. The vent hole 804 at the top of the motor mounting cavity 802 is used for the upper end of the drive motor 6 to achieve air intake.

[0042] In the present technical solution, the first dust cover 17 is connected to the top of the fixing seat 8, and the first dust cover 17 is provided with a gear accommodating cavity 9 for accommodating the first transmission gear 14, the second transmission gear 15, the third transmission gear 12 and the gear shaft 13; the second dust cover 18 is connected to the fixing seat 7 and is located below the first dust cover 17. Specifically, the output shaft of the driving motor 6 is located in the gear accommodating cavity and connected to the first transmission gear 14. The inner wall of the driving wheel housing 1 encloses the gear accommodating cavity 9 to form a gear box, so that the first dust cover also serves as a gear box.

[0043] In this technical solution, if Figure 3 As shown, the first dust cover 17, the second dust cover 18 and the inner wall of the driving wheel housing 1 are arranged to form a dustproof space 10, the driving motor 6 is located outside the dustproof space 10, and the output shaft of the driving motor 6, the first transmission gear 14, the second transmission gear 15, the third transmission gear 12 and the upper part of the ring gear 11 are all located in the dustproof space 10. Specifically, the first dust cover 17 and the second dust cover 18 are combined into a dust cover, as shown in FIG. Figure 3As shown, the driving wheel housing 1, the ring gear 11, the dust cover and the driving motor 6 are arranged in sequence from right to left along the hub shaft 7. The dust cover is connected to the fixing seat, and the ring gear 11 is installed on the inner wall of the driving wheel housing 1. The driving motor 1 is installed on the fixing seat 8, and the body of the driving motor 1 is located outside the protective cover, and the output shaft of the driving motor 1 and the first transmission gear 14 protrude into the protective cover. The design of the first dust cover 17 and the second dust cover 18 can effectively block the turbulent gas and pollutants discharged from the body of the driving motor 1 from entering the dustproof space 10, prevent the transmission components from being contaminated by external pollutants and affecting the transmission accuracy and efficiency, thereby reducing the wear of the transmission components and improving the use quality of the electric wheel hub.

[0044] In this technical solution, if Fig.12 As shown, a seal 25 is provided between the side of the first dust cover 17 and the side of the second dust cover 18 and the inner wall of the driving wheel housing 1. Specifically, due to the assembly relationship, there will be a small gap between the side of the protective cover and the inner wall of the driving wheel housing 1, but the gap is very small, and basically pollutants will not pass through the gap into the dustproof space 10. If necessary, a seal 25 can also be provided in the gap between the first dust cover 17, the second dust cover 18 and the inner wall of the driving wheel housing 1. The seal 25 can be made of sealing paste, dustproof brush, sealing gasket and liquid sealant. The design of this structure can further provide the sealing performance of the dustproof space 10.

[0045] In this technical solution, if Fig.11 As shown, the electric wheel hub also includes a light-emitting component, which includes a light-emitting element 19, a circuit board 20, a coil (not shown in the figure) and a circular magnetic core 23. The circuit board 20 and the coil are both annular; the circular magnetic core 23 is fixedly mounted on the wheel hub shaft 7, the circuit board 20 and the coil are arranged on the driving wheel housing 1, the circular magnetic core 23 is located on the inner side of the circuit board 20, and the coil is arranged on the inner side of the circuit board 20 and between the circuit board 20 and the circular magnetic core 23; the light-emitting element 19 is arranged on the driving wheel housing 1 and is electrically connected to the circuit board 20. In actual application, the rotating driving wheel housing 1 drives the circuit board 20 to rotate, and the rotating circuit board 20 drives the coil to rotate around the circular magnetic core 23. The circular magnetic core 23 cuts the magnetic flux lines, so that the circuit board 20 is energized, and then the light-emitting element 19 is energized to emit light, thereby making the outer circular edge of the wheel hub emit a dazzling lighting effect.

[0046] Specifically, the number of the light-emitting components 19 is multiple, and the multiple light-emitting components 19 are connected to the circuit board 20 through wires 24 respectively; the wires 24 are attached to the inner wall of the driving wheel housing 1 to prevent the wires 24 from interfering with the gear ring 11. The outer circumferential edge of the driving wheel housing 1 is provided with a receiving cavity 21, and the number of the receiving cavities 21 is multiple, and the outer circumferential edge of the driving wheel housing 1 surrounded by the multiple receiving cavities 21 is arranged in an array. The light-emitting component 19 is installed in the receiving cavity 21.

[0047] All technical features in this embodiment can be freely combined according to actual needs.

[0048] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. An electric wheel hub, characterized in that: The invention comprises a driving wheel housing (1), a driven wheel housing (2) connected to the driving wheel housing (1), a hub shaft (7) penetrating the driving wheel housing (1) and the driven wheel housing (2), a receiving space (3) surrounded by the inner walls of the driving wheel housing (1) and the driven wheel housing (2), a driving component arranged in the receiving space (3), and a heat dissipation mechanism for dissipating heat from the receiving space (3), wherein the driving component comprises a driving motor (6) installed on one side of the hub shaft (7) and a transmission component arranged in the receiving space (3), wherein the driving motor (6) drives the driving wheel housing (1) to rotate around the hub shaft (7) through the transmission component.

2. The electric hub according to claim 1, characterized in that: The heat dissipation mechanism comprises an exhaust hole (4) and an air inlet hole (5) arranged on the driving wheel housing (1) and / or the driven wheel housing (2), and the exhaust hole (4) and the air inlet hole (5) are both connected to the accommodating space (3).

3. The electric hub according to claim 2, characterized in that: The exhaust hole (4) and the air inlet hole (5) are arranged on the side wall of the driven wheel housing (2); an air guide block (401) is arranged on one side of the exhaust hole (4); one side of the air guide block (401) is connected to the side wall of the exhaust hole (4); and the other side of the air guide block (401) protrudes into the accommodating space (3) and is arranged obliquely.

4. The electric hub according to claim 3, characterized in that: The distance between the center of the exhaust hole (4) and the center of the hub shaft (7) is greater than the distance between the center of the intake hole (5) and the center of the hub shaft (7).

5. An electric wheel hub according to any one of claims 1 to 4, characterized in that: The transmission assembly comprises a ring gear (11) connected to a driving wheel housing (1), a first transmission gear (14) arranged on an output shaft of a driving motor (6), a gear shaft (13) arranged in an accommodating space (3), a second transmission gear (15) arranged on the gear shaft (13), and a third transmission gear (12) arranged on the gear shaft (13), wherein the first transmission gear (14) meshes with the second transmission gear (15), and the third transmission gear (12) meshes with the ring gear (11).

6. The electric wheel hub according to claim 5, characterized in that: The electric wheel hub also includes a dustproof mechanism for preventing dust from entering the transmission assembly; the dustproof mechanism includes a first dustproof cover (17) and a second dustproof cover (18) which are arranged in the accommodating space (3); the first dustproof cover (17) is used to cover the output shaft of the drive motor (6), the first transmission gear (14), the second transmission gear (15), the third transmission gear (12) and the upper part of the ring gear (11); and the second dustproof cover (18) is used to cover the lower part of the ring gear (11).

7. The electric hub according to claim 6, characterized in that: The first dust cover (17), the second dust cover (18) and the driving wheel housing (1) are arranged to form a dustproof space (10); the driving motor (6) is located outside the dustproof space (10); and the output end and the transmission assembly of the driving motor (6) are located inside the dustproof space (10); and a sealing member (25) is arranged between the side edge of the first dust cover (17) and the side edge of the second dust cover (18) and the inner wall of the driving wheel housing (1).

8. The electric hub according to claim 7, characterized in that: The second dust cover (18) is provided with a receiving groove (181) for receiving the gear ring (11).

9. The electric hub according to claim 6, characterized in that: The electric wheel hub further comprises a fixing seat (8) arranged in the accommodating space (3) and connected to the wheel hub shaft (7); the fixing seat (8) is provided with a shaft sleeve (801) matched with the wheel hub shaft (7); the fixing seat (8) is provided with a motor mounting cavity (802) for mounting and fixing the drive motor (6); the fixing seat (8) is provided with a shaft hole (803) for mounting and fixing the gear shaft (13); a vent hole (804) is provided at the top of the motor mounting cavity (802); the first dust cover (17) is connected to the top of the fixing seat (8); the first dust cover (17) is provided with a gear accommodating cavity (9) for accommodating the first transmission gear (14), the second transmission gear (15), the third transmission gear (12) and the gear shaft (13); the second dust cover (18) is connected to the fixing seat (8) and is located below the first dust cover (17).

10. An electric hub according to any one of claims 1 to 4, characterized in that: The electric wheel hub further comprises a light-emitting component, the light-emitting component comprising a light-emitting element (19), a circuit board (20), a coil and a circular ring-shaped magnetic core (23), the circuit board (20) and the coil both being ring-shaped; the circular ring-shaped magnetic core (23) is fixedly mounted on the wheel hub shaft (7), the circuit board (20) and the coil are arranged on the driving wheel housing (1), the circular ring-shaped magnetic core (23) is located on the inner side of the circuit board (20), the coil is arranged on the inner side of the circuit board (20) and between the circuit board (20) and the circular ring-shaped magnetic core (23); the light-emitting element (19) is arranged on the driving wheel housing (1) and is electrically connected to the circuit board (20).

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