Wheel hubs, impellers, fans and vehicles

Abstract

The application discloses a hub, an impeller, a fan and a vehicle, and relates to the technical field of wheels, in particular to a hub which comprises a mounting portion. The air inlet side and the air outlet side are respectively arranged on both sides of the mounting portion along the axial direction of the mounting portion; a dirt discharging surface is formed on the mounting portion and is arranged in an inclined manner along the direction from the air inlet side to the air outlet side. In this way, the dirt discharging surface is arranged on the mounting portion, so that the sand and dust on the air inlet side and the air outlet side can flow along the dirt discharging surface, the accumulation of the sand and dust in the mounting portion is avoided, and the situation that the uneven force of the hub caused by the accumulation of the sand and dust on the hub leads to the jamming or abnormal noise of the hub is reduced.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a wheel hub, impeller, fan, and vehicle. Background Technology

[0002] Currently, when vehicles are driven in deserts or in areas with frequent sandstorms, the sand and dust can enter the vehicle's cooling system fan due to airflow, affecting the fan's normal operation and even causing damage. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first objective of the present invention is to provide a wheel hub that can enhance sand removal efficiency.

[0004] The second objective of this invention is to propose another type of wheel hub that improves the sand removal effect of the wheel hub.

[0005] A third objective of this invention is to provide an impeller comprising the hub described above.

[0006] A fourth object of the present invention is to provide a fan comprising the impeller described above.

[0007] A fifth object of the present invention is to provide a vehicle including the fan described in the above embodiments.

[0008] According to a first aspect of the present invention, a wheel hub includes: a mounting portion, wherein an air inlet side and an air outlet side are respectively located on both sides of the mounting portion along the axial direction of the mounting portion; a drain surface is formed on the mounting portion, and the drain surface is inclined in a direction away from the central axis of the mounting portion along the direction from the air inlet side to the air outlet side.

[0009] According to an embodiment of the present invention, a drain surface is provided on the mounting part of the wheel hub so that the sand and dust on the air inlet and outlet sides can flow away along the drain surface, thereby avoiding the accumulation of sand and dust in the mounting part and reducing the situation where sand and dust accumulate on the wheel hub, causing uneven force on the wheel hub, resulting in jamming or abnormal noise.

[0010] In some embodiments, the drain surface faces the air outlet side, and along the direction from the air inlet side to the air outlet side, the drain surface is inclined in a direction away from the central axis of the mounting portion.

[0011] In some embodiments, the drain surface faces the air inlet side, and along the direction from the air inlet side to the air outlet side, the drain surface is inclined toward the central axis of the mounting portion.

[0012] In some embodiments, the drain surface extends circumferentially along the mounting portion.

[0013] In some embodiments, at least one sand discharge hole is formed on the mounting portion, the sand discharge hole penetrates the mounting portion, and the sand discharge hole intersects with the sewage discharge surface.

[0014] In some embodiments, the central axis of the sand discharge hole is parallel to the central axis of the mounting portion.

[0015] In some embodiments, the hub further includes a sand-blocking structure disposed on the air outlet side of the mounting portion, wherein at least one surface of the sand-blocking structure along the circumferential direction of the mounting portion is inclined relative to the central axis of the mounting portion.

[0016] In some embodiments, the two side surfaces of the sand-blocking structure along the circumferential direction of the mounting portion are a first surface and a second surface, respectively. The first surface is located upstream of the second surface along the rotation direction of the hub. The first surface is parallel to the central axis of the mounting portion, and the second surface is inclined relative to the central axis of the mounting portion.

[0017] In some embodiments, there are multiple sand-blocking structures, which are arranged at intervals along the circumference of the mounting portion; an included angle α is formed between the two adjacent walls of two adjacent sand-blocking structures, wherein α satisfies: 20°≤α≤30°.

[0018] In some embodiments, at least one weight-reducing groove is formed on the mounting portion, the weight-reducing groove is located on the air inlet side, and the sand discharge hole is formed on the bottom wall of the weight-reducing groove.

[0019] In some embodiments, the sand discharge hole is located upstream of the weight reduction groove along the rotation direction of the impeller.

[0020] In some embodiments, the bottom wall of the weight-reducing groove extends obliquely in a direction from the air inlet side toward the air outlet side, and the sand discharge hole is formed on the side of the bottom wall of the weight-reducing groove away from the central axis of the mounting portion.

[0021] In some embodiments, at least one through hole is formed on the mounting portion, extending obliquely in a direction from the air inlet side toward the air outlet side, and in a direction away from the central axis of the mounting portion.

[0022] In some embodiments, a plurality of sand discharge holes are formed on the mounting portion, and the plurality of sand discharge holes are arranged at intervals along the circumference of the mounting portion.

[0023] In some embodiments, a plurality of through holes are formed on the mounting portion, and the plurality of through holes are arranged at intervals along the circumference of the mounting portion.

[0024] In some embodiments, the mounting portion has a plurality of sand discharge holes, a plurality of through holes, and at least one sewage discharge surface, wherein the plurality of sand discharge holes are located radially outside the plurality of through holes along the mounting portion, and the sewage discharge surface is located radially outside the plurality of through holes along the mounting portion.

[0025] In some embodiments, the plurality of sand discharge holes and the plurality of through holes are respectively opposite to each other.

[0026] In some embodiments, the mounting portion includes: a mounting plate and a peripheral wall, wherein the two sides of the mounting plate along the axial direction of the mounting plate are an air inlet side and an air outlet side, respectively; the peripheral wall includes a first sub-wall and a second sub-wall, one end of the first sub-wall is connected to the mounting plate and extends obliquely along the direction from the air inlet side to the air outlet side, and the other end of the first sub-wall extends in a direction away from the central axis of the mounting plate, wherein the surface of the first sub-wall adjacent to the central axis of the mounting plate is the drain surface, one end of the second sub-wall is connected to the other end of the first sub-wall, and the other end of the second sub-wall extends in a direction toward the air inlet side.

[0027] According to a second aspect of the present invention, a wheel hub includes: a mounting portion having at least one sand discharge hole formed thereon, the sand discharge hole penetrating the mounting portion.

[0028] In some embodiments, the central axis of the sand discharge hole is parallel to the central axis of the mounting portion.

[0029] In some embodiments, there are multiple sand discharge holes, which are arranged at intervals along the circumference of the mounting portion.

[0030] In some embodiments, the sand discharge hole is disposed on the outer periphery of the mounting portion.

[0031] The impeller according to a third aspect of the present invention includes the hub described in any of the above embodiments.

[0032] According to a fourth aspect of the present invention, a fan includes: a wind shield and an impeller, wherein an opening is formed on the wind shield, and the impeller is any one of the impellers described above, and the impeller is disposed at the opening.

[0033] In some embodiments, the opening is provided with a windproof ring, and a sand discharge port is formed at the bottom of the windproof ring, the sand discharge port being opposite to the impeller.

[0034] In some embodiments, the fan further includes a sand discharge valve, which is disposed at the sand discharge port. When the force exerted by the fluid at the sand discharge port on the sand discharge valve reaches the opening force of the sand discharge valve, the sand discharge port opens; when the force exerted by the fluid at the sand discharge port on the sand discharge valve does not reach the opening force of the sand discharge valve, the sand discharge port closes.

[0035] In some embodiments, the sand discharge valve includes: a sand discharge baffle and at least one elastic reset member. The sand discharge baffle is openably and closably disposed at the sand discharge port. The sand discharge baffle is rotatably connected to the air guard ring. The elastic reset member is configured to keep the sand discharge baffle normally closed at the sand discharge port.

[0036] In some embodiments, the device further includes: at least one rotating shaft rotatably disposed on the windshield ring, the sand discharge baffle connected to the rotating shaft, and the elastic reset member sleeved on the rotating shaft to drive the sand discharge baffle to open and close the sand discharge port.

[0037] In some embodiments, the fan further includes a motor disposed at the mounting portion, the motor including a rotor, and the mounting portion being connected to the rotor.

[0038] A vehicle according to a fifth aspect of the present invention includes the fan described in any of the above embodiments.

[0039] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0041] Figure 1 This is a schematic diagram of the air inlet side of a fan according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the air outlet side of a fan according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the fan from an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the air outlet side of the impeller according to an embodiment of the present invention;

[0045] Figure 5 yes Figure 4 Enlarged schematic diagram of region P in the middle;

[0046] Figure 6This is a schematic diagram of the air inlet side of the impeller according to an embodiment of the present invention;

[0047] Figure 7 yes Figure 6 Enlarged schematic diagram of the mid-Q region;

[0048] Figure 8 This is a cross-sectional schematic diagram of a fan according to an embodiment of the present invention;

[0049] Figure 9 yes Figure 8 Enlarged schematic diagram of region N in the middle;

[0050] Figure 10 yes Figure 8 Enlarged schematic diagram of the R region;

[0051] Figure 11 yes Figure 8 A magnified view of region M in the middle.

[0052] Figure label:

[0053] 100. Fan;

[0054] 10. Impeller; 11. Mounting section; 111. Through hole; 112. Sand discharge hole; 113. Sewage discharge surface; 114. Mounting plate; 115. Peripheral wall; 1151. First sub-wall; 1152. Second sub-wall; 12. Blade; 13. Weight reduction groove;

[0055] 20. Sand-blocking structure; 21. First surface; 22. Second surface;

[0056] 30. Windshield; 31. Opening; 32. Windshield ring; 321. Sand discharge port;

[0057] 40. Sand discharge valve; 41. Sand discharge baffle; 42. Rotary shaft;

[0058] 50. Electric motor;

[0059] a) Air inlet side; b) Air outlet side. Detailed Implementation

[0060] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-11 An impeller 10 according to an embodiment of the present invention is described, the impeller 10 including: a mounting portion 11.

[0061] Specifically, such as Figures 1-5 As shown, the two sides of the mounting part 11 along the axial direction of the mounting part 11 are the air inlet side a and the air outlet side b, respectively. A drain surface 113 is formed on the mounting part 11, and the drain surface 113 is inclined in the direction from the air inlet side a to the air outlet side b, and the drain surface 113 is inclined away from the central axis of the mounting part 11.

[0062] In this embodiment, the fan 100, as part of the vehicle's cooling system, is used to introduce outside air into the vehicle's front compartment, thereby reducing the temperature of the engine and / or drive motor and ensuring their normal operation. Simultaneously, some of the air entering the fan 100 recirculates back, dissipating heat from the motor 50 included in the fan 100. For example, when the vehicle is driving in a desert area, the vehicle is affected by sandstorms. As the wheel hub rotates, sand and dust enter the mounting portion 11 of the wheel hub with the air, accumulating in the mounting portion 11 or on the wheel hub, causing wheel hub wear or abnormal noise, affecting the wheel hub's service life. A drainage surface 113 is provided on at least one of the two sides of the mounting portion 11 along its central axis; that is, the drainage surface 113 can be provided on the air inlet side a or the air outlet side b, or both air inlet side a and air outlet side b.

[0063] According to an embodiment of the present invention, a drain surface is provided on the mounting part 11 of the wheel hub so that the sand and dust on the air inlet side a and the air outlet side b can flow away along the drain surface, thereby avoiding the accumulation of sand and dust in the mounting part 11 and reducing the situation where sand and dust accumulate on the wheel hub, causing uneven force on the wheel hub, resulting in jamming or abnormal noise.

[0064] Furthermore, the installation of the drainage surface 113 can reduce the dynamic imbalance during the operation of the wheel hub, enabling the wheel hub to operate stably and preventing damage. At the same time, the wheel hub generates a large centrifugal force during rotation, causing sand and dust to flow away from the drainage surface at a faster rate under the combined action of centrifugal force and gravity, which helps to reduce the possibility of sand and dust accumulating in the mounting section 11.

[0065] Here, dynamic imbalance is a mechanical term for relative dynamic balance. It refers to the phenomenon that rotating parts or components vibrate and have adverse effects when rotating due to shape errors (such as misalignment of inner and outer circles, non-circularity of cylinders, non-straight generatrices, non-perpendicularity of end faces to axes, etc.) and uneven internal structure. The dynamic imbalance quantity is the physical quantity that measures this phenomenon.

[0066] For example, the drain surface on the mounting part 11 is set facing the air outlet side b. At this time, the drain surface is inclined in the direction away from the central axis of the mounting part 11 along the direction from the air inlet side a to the air outlet side b, so that the sand and dust flowing to the air outlet side b can be discharged in the circumference of the mounting part 11 of the hub under the action of the centrifugal force generated by the rotation of the hub. This can avoid the sand and dust affecting the rotation of the hub on the air outlet side b and reduce the possibility of uneven force on the hub causing abnormal noise.

[0067] The sewage discharge surface of the mounting part 11 is set facing the air inlet side a, and is inclined towards the central axis of the mounting part 11 in the direction from the air inlet side a to the air outlet side b. During the rotation of the hub, both the air inlet side a and the air outlet side b are affected by centrifugal force. The sand and dust on the air inlet side a are discharged towards the outer periphery of the mounting part 11 under the action of centrifugal force, which can reduce the possibility of sand and dust adhering to the hub on the air inlet side a.

[0068] Optionally, drainage surfaces are formed on both the air inlet side a and the air outlet side b of the mounting portion 11. These drainage surfaces are symmetrically distributed along the direction perpendicular to the central axis of the mounting portion 11. When the hub rotates, sand and dust on the air inlet side a and the air outlet side b are discharged from the mounting portion 11 towards the outer periphery of the mounting portion 11 along the direction perpendicular to the central axis of the mounting portion 11 under the action of centrifugal force and their own gravity. This effectively reduces the impact of sand and dust on the hub from the air inlet side a and the air outlet side b, increasing the hub's sand removal capacity. In some embodiments, the drainage surface 113 extends circumferentially along the mounting portion 11. The drainage surface 113 is an annular inclined surface and is located on the side of the mounting portion 11 adjacent to its center. The centrifugal force generated by the circumferential rotation of the hub is distributed circumferentially along the mounting portion 11. The circumferentially extended drainage surface 113 can better discharge sand and dust, reducing the impact of sand and dust on the hub's rotation.

[0069] In some embodiments, such as Figures 4-10 As shown, at least one sand discharge hole 112 is formed on the mounting part 11. The sand discharge hole 112 penetrates the mounting part 11 from the air inlet side a to the air outlet side b, and intersects with the sewage discharge surface 113. Multiple sand discharge holes 112 are formed on the mounting part 11, spaced apart circumferentially along the mounting part 11, and are formed on the sewage discharge surface 113. When sand and dust pass through the fan 100 with the air under the action of the fan 100, some sand and dust are blocked by the mounting part 11 and slide off at the air inlet side a, while some sand and dust enter the fan 100 through the sand discharge hole 112 and slide off at the air outlet side b of the mounting part 11.

[0070] When the wheel hub rotates, the sand and dust entering from the air intake side a flows to the air outlet side b. Taking the sewage discharge surface 113 located on the air outlet side b as an example, the side opposite to the mounting part 11 and located on the air outlet side b along the central axis of the mounting part 11 will form a negative pressure area due to the different air flow velocity from the surrounding area. Some of the sand and dust on the air outlet side b will flow back into the mounting part 11. The sand discharge hole 112 intersects with the sewage discharge surface 113 so that the airflow generated by the air in the sand discharge hole 112 can blow away the sand and dust located on the sewage discharge surface 113, avoiding the accumulation of sand and dust in the mounting part 11, which would cause uneven force during the rotation of the wheel hub and reduce the possibility of the wheel hub vibrating and making abnormal noise.

[0071] In some embodiments, the central axis of the sand discharge hole 112 is parallel to the central axis of the mounting portion 11. On the one hand, the parallelism between the central axis of the sand discharge hole 112 and the central axis of the mounting portion 11 facilitates the flow of sand and dust from the air inlet side a to the air outlet side b, increasing the air velocity within the sand discharge hole 112 so that sand and dust can pass through more efficiently; on the other hand, it facilitates the sand discharge hole 112 being located on the sewage discharge surface 113 and intersecting with it, thereby facilitating the removal of sand and dust from the sewage discharge surface 113.

[0072] In some embodiments, such as Figure 4 and Figure 5 As shown, the wheel hub also includes a sand-blocking structure 20, which is disposed on the air outlet side b of the mounting portion 11. At least one surface of the sand-blocking structure 20 along the circumferential direction of the mounting portion 11 is inclined relative to the central axis of the mounting portion 11. The sand-blocking structure 20 is located between two adjacent sand discharge holes 112. In this embodiment, taking the sand-blocking structure 20 disposed on the air outlet side b and between two adjacent sand discharge holes 112 as an example, one end of the sand-blocking structure 20 is connected to the sewage discharge surface 113 of the mounting portion 11, and the other end of the sand-blocking structure 20 extends along the central axis of the mounting portion 11.

[0073] The mounting portion 11 has a cover-like structure, and a receiving groove is provided on one side of the mounting portion 11 adjacent to the air outlet side b. The sand-blocking structure 20 is disposed in the receiving groove. The sand-blocking structure 20 being inclined on at least one side of the circumferential surface of the mounting portion 11 can mean that the sand-blocking structure 20 is inclined on one side of the two sides of the circumferential direction, or that both sides are inclined. In this embodiment, the sand-blocking structure 20 is inclined on one side.

[0074] Therefore, the sand-blocking structure 20, which is inclined on the air outlet side b, can easily separate the sewage discharge surface 113, preventing sand and dust from flowing between the sand discharge holes 112. Combined with the increased sand discharge capacity of the impeller 10 due to the sewage discharge surface 113, the sand and dust can slide off the sand-blocking structure 20 under the action of its own gravity and the centrifugal force generated by the rotation of the hub. At the same time, the inclined arrangement of at least one side of the sand-blocking structure 20 can facilitate demolding during hub manufacturing, making it easier to form the mounting part 11 and the sand-blocking structure 20, reducing the difficulty of hub manufacturing, and improving hub production efficiency.

[0075] In some embodiments, such as Figure 5As shown, the sand-blocking structure 20 has two circumferential surfaces along the mounting portion 11, namely a first surface 21 and a second surface 22. The first surface 21 is located upstream of the second surface 22 along the rotation direction of the hub. That is, as the hub rotates, such as when the hub rotates counterclockwise, some air rotates along the circumference of the mounting portion 11. At this time, the air first passes through the first surface 21 and then through the second surface 22. The first surface 21 is located upstream of the second surface 22 in the airflow direction. The first surface 21 is parallel to the central axis of the mounting portion 11, that is, the first surface 21 is set perpendicular to the mounting portion 11, so as to increase the air intake in the direction of the central axis of the mounting portion 11 during the rotation of the fan 100, and increase the heat dissipation of the front compartment behind the fan 100.

[0076] The second surface 22 is inclined relative to the central axis of the mounting part 11. That is, the second surface 22 is inclined relative to the first surface 21 in the circumferential direction of the mounting part 11, so that after the sand and dust pass through the sand discharge hole 112, the sand and dust can slide out of the hub by sticking to the surface of the second surface 22 under the action of centrifugal force.

[0077] In this embodiment, the first surface 21 of the sand-blocking structure 20 is parallel to the central axis of the mounting portion 11, and the second surface 22 is inclined to the central axis of the mounting portion 11. This increases the airflow of the fan 100 and improves the sand-removing capacity, while also facilitating the manufacturing and demolding of the wheel hub, thereby improving production efficiency. The included angle between the first surface 21 and the second surface 22 of two adjacent sand-blocking structures 20 is 25°, that is, the angle of inclination of the second surface 22 is 25°, which facilitates both demolding and sand-slipping during manufacturing.

[0078] In some embodiments, such as Figure 5 As shown, there are multiple sand-blocking structures 20, which are arranged at intervals along the circumference of the mounting portion 11. At least one sand-discharging hole 112 is provided between each pair of adjacent sand-blocking structures 20. An included angle α is formed between the two adjacent wall surfaces of two adjacent sand-blocking structures 20, where α satisfies: 20°≤α≤30°. For example, each pair of adjacent sand-blocking structures 20 has a first surface 21 and a second surface 22, and the included angle between the first surface 21 of one sand-blocking structure 20 and the second surface 22 of the other sand-blocking structure 20 is α. If the included angle is small, a negative pressure area is formed on the air outlet side b of the mounting portion 11 as the hub rotates, making it easy for sand and dust to accumulate inside the mounting portion 11. Furthermore, it is difficult to demold during hub manufacturing, affecting the manufacturing accuracy of the mounting portion 11. If the included angle is large, the sand-blocking effect of the sand-blocking structure 20 in the circumferential direction is poor when the hub rotates, affecting the sand-discharging effect of the hub in the central axis direction. Here, α=25°. Therefore, limiting the included angle between the two adjacent walls of two sand-blocking structures 20 facilitates sand removal and improves the sand removal effect of the wheel hub. On the other hand, it facilitates the removal of the mold during the manufacturing of the wheel hub.

[0079] In some embodiments, combined with Figures 6-9 At least one weight-reducing groove 13 is formed on the mounting portion 11, located on the air inlet side a, and a sand discharge hole 112 is formed on the bottom wall of the weight-reducing groove 13. That is, a weight-reducing groove 13 is also provided on the mounting portion 11 to reduce the weight of the hub. The weight-reducing groove 13 is located on the side of the sand discharge hole 112 away from the center of the mounting portion 11, perpendicular to the central axis of the mounting portion 11. The weight-reducing groove 13 is formed by a portion of the mounting portion 11 recessed from the air inlet side a to the air outlet side b, reducing the accumulation of sand and dust in the weight-reducing groove 13, so that the sand and dust in the weight-reducing groove 13 can be quickly discharged from the sand discharge hole 112, increasing the air intake of the impeller 10. A sand discharge hole 112 is provided on the side wall of the weight reduction groove 13 near the air outlet side b. The sand discharge hole 112 is located at the bottom of the weight reduction groove 13 along the central axis of the mounting part 11 and is located on one side of the weight reduction groove 13 along the circumference of the mounting part 11. Some of the sand entering the fan 100 is blocked and flows back from the air inlet side a of the mounting part 11 at the weight reduction groove 13, and some of the sand is blown from the sand discharge hole 112 to the air outlet side b.

[0080] Therefore, the weight reduction groove 13 facilitates the reduction of the impeller 10's weight, achieving a lighter impeller 10, making the impeller 10 rotate more smoothly, and better blocking sand and dust, allowing the sand and dust to slide off from the air inlet side a. At the same time, the sand discharge hole 112 provided in the weight reduction groove 13 can further increase the sand discharge capacity of the hub, reducing the accumulation of sand and dust on the hub, so that the sand and dust in the weight reduction groove 13 can flow away through the sand discharge hole 112, reducing the accumulation of sand and dust in the weight reduction groove 13.

[0081] In addition, the weight reduction groove 13 and the sand discharge hole 112 can increase the air intake capacity of the wheel hub and increase the air flow rate, so as to better remove the sand and dust on the sewage discharge surface 113 and facilitate the formation of a negative pressure environment on the air outlet side b of the wheel hub so that some air can enter the mounting part 11 to dissipate heat from the motor 50.

[0082] In some embodiments, such as Figure 6 and Figure 7As shown, the sand discharge hole 112 is located upstream of the weight reduction groove 13 along the rotation direction of the hub. The sand discharge hole 112 is located upstream of the weight reduction groove 13 along the rotation direction of the impeller 10. For example, when viewed from the air inlet side a, the hub rotates clockwise, and the sand discharge hole 112 is located upstream of the weight reduction groove 13. That is, the direction from the upstream end to the downstream end of the weight reduction groove 13 is the same as the rotation direction of the impeller 10. As the impeller 10 rotates, the sand and dust in the weight reduction groove 13 flow towards the upstream side of the weight reduction groove 13 under the action of centrifugal force. The sand discharge hole 112 is located on the upstream side, which can smoothly discharge the sand and dust in the weight reduction groove 13 and avoid the accumulation of sand and dust in the weight reduction groove 13. In this context, the upstream direction of the impeller 10's rotation can be understood as follows: when the impeller 10 rotates clockwise, the air rotates counterclockwise along the circumference of the mounting portion 11 on the outlet side b. The air flows along the circumference of the mounting portion 11 towards the side of the weight reduction groove 13 where the sand discharge hole is located. That is, the direction of sand flow is the same as the direction of the hub's rotation, and the sand flows towards the sand discharge hole 112 in the weight reduction groove 13 on the outlet side b. The sand in the weight reduction groove 13 flows upstream, collects upstream, and flows out from the sand discharge hole 112.

[0083] Therefore, the sand discharge hole 112 is located downstream of the weight reduction groove 13 along the rotation direction of the impeller 10, which facilitates the flow of sand and dust in the weight reduction groove 13 to the sand discharge hole 112 under the action of centrifugal force, increases the flow rate of sand and dust in the sand discharge hole 112, facilitates the faster flow of sand and dust, reduces the possibility of sand and dust adhering to the impeller 10, and reduces the impact of sand and dust on the rotation of the impeller 10.

[0084] In some embodiments, refer to Figure 9 Along the direction from the air inlet side a to the air outlet side b, the bottom wall of the weight reduction groove 13 extends obliquely in the direction away from the central axis of the mounting part 11, and the sand discharge hole 112 is formed on the side of the bottom wall of the weight reduction groove 13 away from the central axis of the mounting part 11.

[0085] The bottom wall of the weight-reducing groove 13 extends gradually from the air inlet side a to the air outlet side b along the central axis of the mounting part 11, moving away from the center of the mounting part 11. Under the influence of centrifugal force and gravity, the sand and dust in the weight-reducing groove 13 can concentrate on the side of the weight-reducing groove 13 away from the center of the mounting part 11 along the vertical axis. This allows the sand and dust entering the weight-reducing groove 13 to be concentrated at the sand discharge hole 112 and then discharged through the sand discharge hole 112 under the action of airflow. This reduces the accumulation of sand and dust in the weight-reducing groove 13 and reduces the dynamic imbalance of the wheel hub caused by sand and dust adhering to it. Therefore, the inclined bottom wall of the weight-reducing groove 13 facilitates the smooth discharge of sand and dust from the sand discharge hole 112, increases the sand discharge capacity of the sand discharge hole 112, reduces the adhesion of sand and dust to the wheel hub, and ensures balanced force distribution across the wheel hub, reducing wear and vibration.

[0086] The angle between the bottom wall of the weight-reducing groove 13 and the central axis of the mounting part 11 is β, where β = 25°. Specifically, the angle of inclination of the bottom wall can be selectively designed according to the specific application scenario and the difficulty of the implementation process. Here, the angle of inclination of the bottom wall includes, but is not limited to, 25°. For example, the angle between the bottom wall and the central axis of the mounting part 11 can be in the range of 0 < α ≤ 90°.

[0087] In some embodiments, such as Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, at least one through hole 111 is formed on the mounting portion 11. The through hole 111 extends obliquely in a direction away from the central axis of the mounting portion 11, from the air inlet side a towards the air outlet side b. For example, the through hole 111 is provided on the mounting portion 11 near the edge of the mounting portion 11, and the central axis of the through hole 111 forms an angle with the central axis of the mounting portion 11, and the angle is acute. When the sand flows from the air inlet side a to the air outlet side b, it will gradually flow away from the center of the mounting portion 11. During the rotation of the hub, centrifugal force is generated in a direction perpendicular to the central axis of the mounting portion 11. The sand entering the hub moves towards the outer periphery of the mounting portion 11 under the action of centrifugal force and its own gravity. Therefore, the through hole 111 extends obliquely in a direction away from the central axis so that the opening direction of the through hole 111 is the same as the direction of sand flow.

[0088] Therefore, the through hole 111 extends obliquely in the direction away from the central axis of the mounting part 11, so that sand and dust can be discharged from the through hole 111, while the centrifugal force of the hub rotation can accelerate the flow of sand and dust, which can further ensure that sand and dust do not accumulate on the hub, reduce the impact on the stability of the hub rotation, and improve the smoothness of the hub rotation.

[0089] In some embodiments, such as Figures 4-7 As shown, the mounting portion 11 has multiple sand discharge holes 112 and multiple through holes 111, which are spaced apart circumferentially along the mounting portion 11. The multiple through holes 111 are located on the surface of the mounting portion 11 adjacent to the air inlet side a, and are radially inner to the multiple sand discharge holes 112. Both the through holes 111 and the sand discharge holes 112 are used for sand discharge. Under the centrifugal force generated by the rotation of the impeller 10 and its own gravity, sand flows radially towards the outside of the mounting portion 11. A portion of the sand returning to the air inlet side a of the through holes 111 flows into the weight reduction groove 13 and is discharged through the sand discharge holes 112. The sand discharge holes 112 located in the weight reduction groove 13 have a stronger sand discharge capacity than the through holes 111, and can effectively utilize the centrifugal force generated by the rotation of the impeller 10 to accelerate the sand discharge capacity of the impeller 10.

[0090] Optionally, the mounting part 11 has a drain surface 113 formed on the air outlet side b. The drain surface 113 is disposed facing the air outlet side b. A plurality of sand discharge holes 112 are located on the radial outer side of the plurality of through holes 111 along the mounting part 11, and the drain surface 113 is located on the radial outer side of the plurality of through holes 111 along the mounting part 11.

[0091] Multiple through holes 111 and multiple sand discharge holes 112 are arranged radially along the mounting portion 11, with the sand discharge holes 112 located radially outside the through holes 111 and the sewage discharge surface 113 located radially outside the through holes 111. The sand discharge holes 112 penetrate the side wall where the sewage discharge surface 113 is located. The sand discharge holes 112 can blow away the sand and dust accumulated on the sewage discharge surface 113. The centrifugal force generated by the rotation of the hub can accelerate the sand and dust to flow radially along the mounting portion 11 towards the through holes 111 and the sand discharge holes 112, increasing the flow velocity in the through holes 111 and the sand discharge holes 112. The air passing through the through holes 111 can flow to the sewage discharge surface 113 and, combined with the sand and dust carried out of the airflow side b by the sand discharge holes 112, can increase the sand discharge capacity of the hub, improve the adhesion of sand and dust on the hub, and increase the flow of air between the airflow side a and the airflow side b.

[0092] In some embodiments, combined with Figures 5-7 Multiple sand discharge holes 112 and multiple through holes 111 are respectively aligned. That is, the multiple sand discharge holes 112 and multiple through holes 111 correspond one-to-one on the mounting part 11. The air entering through the through holes 111 can be blown between two adjacent sand-blocking structures 20, which helps to discharge sand and dust on the discharge surface 113 and prevents sand and dust from accumulating between two adjacent sand-blocking structures 20. This further ensures that sand and dust do not accumulate between two adjacent sand-blocking structures 20, and increases the sand discharge effect of the wheel hub.

[0093] Specifically, such as Figure 6 and Figure 7 As shown, the sand discharge hole 112 is radially offset from the corresponding through hole 111 along the mounting portion 11, and the sand discharge hole 112 is located downstream of the corresponding through hole 111 along the rotation direction of the hub. The sand discharge hole 112 is radially located outside the through hole 111 along the mounting portion 11, and the through hole 111 and the sand discharge hole 112 are radially misaligned in the mounting portion 11. Along the rotation direction of the impeller 10, the sand discharge hole 112 is located downstream of the through hole 111, meaning that for the through hole 111 and the sand discharge hole 112 in the same orientation, sand and dust on the air inlet side a surface first pass through the through hole 111 and then through the sand discharge hole 112. The sand discharge hole 112 is located on the downstream side of the bottom wall of the weight reduction groove 13 along the circumference of the mounting part 11. If the bottom wall of the weight reduction groove 13 has a first side and a second side in the circumference of the mounting part 11, and the hub rotates from the second side to the first side, the sand discharge hole 112 is located adjacent to the second side so that the sand and dust can be quickly discharged from the sand discharge hole 112 under the action of centrifugal force.

[0094] In some embodiments, such as Figure 5 , Figure 9 and Figure 10 As shown, the mounting part 11 includes a mounting plate 114, a peripheral wall 115, and a plurality of blades 12. The two sides of the mounting plate 114 along the axial direction are the air inlet side a and the air outlet side b, respectively. The peripheral wall 115 includes a first sub-wall 1151 and a second sub-wall 1152. One end of the first sub-wall 1151 is connected to the mounting plate 114, and the other end of the first sub-wall 1151 extends obliquely away from the central axis of the mounting plate 114 along the direction from the air inlet side a to the air outlet side b. The surface of the first sub-wall 1151 adjacent to the central axis of the mounting plate 114 is a drain surface 113. The first sub-wall 1151 is disposed near the center of the mounting portion 11 along the central axis of the vertical mounting portion 11. The first sub-wall 1151 extends obliquely away from the central axis from the air inlet side a to the air outlet side b. The side of the first sub-wall 1151 away from the second sub-wall 1152 is the sewage discharge surface 113, which facilitates the discharge of sand and dust flowing to the air outlet side b along the sewage discharge surface 113.

[0095] One end of the second sub-wall 1152 is connected to the other end of the first sub-wall 1151, meaning that the first sub-wall 1151 and the second sub-wall 1152 are adjacent on the air outlet side b of the mounting portion 11. The other end of the second sub-wall 1152 extends towards the air inlet side a, while the first sub-wall 1151 extends obliquely towards the central axis of the mounting portion 11, and is far from the other end of the second sub-wall 1152. Multiple blades 12 are all connected to the outer peripheral side of the second sub-wall 1152, and the multiple blades 12 are spaced apart circumferentially along the mounting plate 114.

[0096] In this embodiment, the peripheral wall 115 is provided with a first sub-wall 1151 and a second sub-wall 1152 along the direction of the central axis of the vertical mounting part 11. The first sub-wall 1151 extends obliquely from the air inlet side a to the air outlet side b in a direction away from the central axis. One end of the first sub-wall 1151 away from the central axis of the mounting part 11 is connected to the second sub-wall 1152, and one end of the second sub-wall 1152 away from the first sub-wall 1151 extends along the central axis of the mounting part 11 towards the air inlet side a. The sand-blocking structure 20 is provided on the side of the first sub-wall 1151 away from the second sub-wall 1152, and the blades 12 are provided on the side of the second sub-wall 1152 away from the first sub-wall 1151. Multiple blades 12 are spaced apart on the outer peripheral side of the second sub-wall 1152. Thus, the arrangement of the first sub-wall 1151 and the second sub-wall 1152 facilitates the formation of a weight-reducing groove 13 on the air inlet side a, thereby improving the structural strength of the mounting part 11. At the same time, a sewage discharge surface 113 is formed on the air outlet side b, which increases the speed of sand and dust flow on the air outlet side b and improves the sand discharge capacity of the impeller 10.

[0097] Another wheel hub according to an embodiment of the present invention includes a mounting portion 11, on which at least one sand discharge hole 112 is formed, the sand discharge hole 112 penetrating the mounting portion 11. Thus, by providing the sand discharge hole 112 on the mounting portion 11, as air flows from the air inlet side a to the air outlet side b, some sand and dust can flow from the sand discharge hole 112 to the air outlet side b, carrying away the sand and dust on the air outlet side b of the mounting portion 11, preventing sand and dust accumulation on the air outlet side b, increasing airflow between the air inlet side a and the air outlet side b, improving the negative pressure area formed by the mounting portion 11 on the air outlet side b, and reducing the possibility of sand and dust adhering to the mounting portion 11 due to negative pressure backflow.

[0098] Optionally, the central axis of the sand discharge hole 112 is parallel to the central axis of the mounting part 11. That is, the sand discharge hole 112 passes through the air inlet side a and air outlet side b of the mounting part 11 along the central axis direction, ensuring airflow within the sand discharge hole 112 and increasing the airflow velocity within the sand discharge hole 112 so as to better discharge sand and dust that may accumulate on the air outlet side b of the mounting part 11.

[0099] Furthermore, there are multiple sand discharge holes 112, which are arranged at intervals along the circumference of the mounting portion 11. Thus, the multiple sand discharge holes 112 are arranged at intervals along the circumference of the mounting portion 11 so that when the hub rotates, the sand and dust on the air outlet side b can be blown out circumferentially under the action of centrifugal force and the sand discharge holes 112, thereby reducing the weight of the mounting portion 11 and improving the sand discharge effect of the hub.

[0100] In some embodiments, the sand discharge hole 112 is located on the outer periphery of the mounting portion 11. That is, the sand discharge hole 112 is located near the outer periphery of the mounting portion 11. In this case, the distance between the sand discharge hole 112 and the center of the mounting portion 11 is relatively large, and the centrifugal force generated by the rotation of the hub at the outer periphery is large, which helps to improve the sand discharge effect at the sand discharge hole 112. At the same time, the location of the sand discharge hole 112 can reduce the interference of the motor 50 located on the air outlet side b of the hub, and reduce the impact of sand and dust on the motor 50.

[0101] According to a third aspect of the present invention, the impeller 10 includes the hub described in any of the above-mentioned embodiments. The hub is provided with a sand-blocking structure 20, a sand discharge hole 112, and a sewage discharge surface 113. Sand and dust accumulated in the hub can be discharged in a timely manner, preventing uneven force distribution during hub rotation due to sand and dust accumulation, which could lead to wear and affect the hub's service life. Simultaneously, it can reduce noise generation and improve user comfort. According to a fourth aspect of the present invention, the fan 100 includes a wind shield 30 and an impeller 10. An opening 31 is formed on the wind shield 30. The impeller 10 is any of the impellers described in the above embodiments and is located at the opening 31. That is, the wind shield 30 is open on at least one side along the central axis of the mounting portion 11, forming the opening 31. The impeller 10 is inserted into the wind shield 30 through the opening 31. The wind shield 30 can protect the impeller 10 while preventing more sand and dust from entering the front compartment.

[0102] Furthermore, an air guard ring 32 is provided at the opening 31, and a sand discharge port 321 is formed at the bottom of the air guard ring 32, which is opposite to the impeller 10. During the rotation of the impeller 10, the sand and dust returning from the air inlet side a of the fan 100 and the sand and dust sliding down from the through hole 111 and the sand discharge hole 112 will fall into the air guard ring 32, fall along the circumference of the air guard ring 32 into the sand discharge port 321, and flow away from the sand discharge port 321. The air guard ring 32 can be fixedly installed on the wind shield 30, or the air guard ring 32 and the wind shield 30 can be integrally formed. Thus, the sand discharge port 321 at the bottom of the air guard ring 32 allows the sand and dust falling during the operation of the fan 100 to flow away from the sand discharge port 321, preventing the sand and dust from accumulating at the bottom of the air guard ring 32.

[0103] In some embodiments, such as Figure 3 and Figure 8 As shown, the fan 100 also includes a sand discharge valve 40, which is located at the sand discharge port 321. When the force exerted by the fluid at the sand discharge port 321 on the sand discharge valve 40 reaches the opening force of the sand discharge valve 40, the sand discharge port 321 opens; when the force exerted by the fluid at the sand discharge port 321 on the sand discharge valve 40 does not reach the opening force of the sand discharge valve 40, the sand discharge port 321 closes. That is, as the fan 100 operates, sand and dust entering the fan 100 and falling into the sand discharge port 321 accumulate. When the weight generated by the accumulated sand and dust exceeds the force exerted by the sand discharge valve 40 on the sand discharge port 321, the sand discharge port 321 opens, and the accumulated sand and dust flows away from the sand discharge port 321. When the weight accumulated at the sand discharge port 321 is less than the force exerted by the sand discharge valve 40 at the sand discharge port 321, the sand discharge valve 40 closes the sand discharge port 321. This increases the stability of the airflow inside the fan 100 when sand discharge is not required, reduces the impact of the unstable airflow when the sand discharge valve 40 is open on the stability of the impeller 10's rotation, and enables the impeller 10 to maintain good stability, thereby improving the quietness and reliability of the fan 100's operation.

[0104] In some embodiments, such as Figures 8-10 As shown, the sand discharge valve 40 includes: a sand discharge baffle 41 and at least one elastic reset member. The sand discharge baffle 41 is closably disposed at the sand discharge port 321, and the sand discharge baffle 41 is rotatably connected to the air shield 32. The elastic reset member is configured to keep the sand discharge baffle 41 normally closed at the sand discharge port 321. The air shield 30 has a mounting groove at a position opposite to the sand discharge port 321, and the elastic reset member is disposed in the mounting groove. The elastic reset member can be a spiral spring or a torsion spring. One end of the elastic reset member abuts against the sand discharge baffle 41, and the other end abuts against the air shield 30. Under the action of an external force, the sand discharge baffle 41 rotates away from the sand discharge port 321. When the external force is less than the force of the elastic reset member, the sand discharge baffle 41 closes the sand discharge port 321.

[0105] Therefore, the sand discharge valve 40 can automatically open and close the sand discharge port 321. The sand discharge valve 40 has a simple structure, is easy to design and install, provides good sand discharge, and can effectively reduce sand discharge costs. The external force here can be the gravity of the sand at the sand discharge port 321 or the resultant force of gravity and centrifugal force. The sand discharge valve 40, which closes and opens the sand discharge port 321, is not limited and can be a solenoid valve.

[0106] Furthermore, the sand discharge valve 40 also includes at least one rotating shaft 42, which is rotatably mounted on the air guard ring 32. The sand discharge baffle 41 is connected to the rotating shaft 42, and an elastic reset member is sleeved on the rotating shaft 42 to drive the sand discharge baffle 41 to open and close the sand discharge port 321. The rotating shaft 42 is rotatably mounted on the air guard ring 32, the sand discharge baffle 41 is connected to the rotating shaft 42, and the elastic reset member is connected between the rotating shaft 42 and the air guard ring 32. The elastic reset member is sleeved on the rotating shaft 42 so that the rotating shaft 42 can provide support and limit the elastic reset member and the sand discharge baffle 41. In some embodiments, the fan 100 further includes a motor 50, which is located at the mounting portion 11. The motor 50 includes a rotor, and the mounting portion 11 is connected to the rotor. That is, the motor 50 is located on the side of the mounting portion 11 adjacent to the air outlet side b, and the rotor is mounted to the mounting portion 11. The working rotor of the motor 50 drives the mounting portion 11 to rotate together to achieve air intake.

[0107] The vehicle according to a third aspect of the present invention includes a fan 100 of any of the above embodiments.

[0108] According to an embodiment of the present invention, a fan 100 with sand-discharging capability is installed in the front compartment of the vehicle. When the vehicle is driven in extreme environments such as desert areas, where sandstorms occur year-round, the fan 100 will bring in a significant amount of sand while cooling. Multiple sand-discharging holes 112 and sand-discharging inlets 321 are provided on the mounting portion 11 of the fan 100 to ensure timely discharge of sand and dust, effectively preventing sand and dust accumulation on the fan 100 and reducing the impact on the stability of the multi-impeller 10's rotation. Furthermore, the through holes 111 and sand-discharging holes 112, along with the sand-blocking structure 20 on the fan 100, allow sand and dust to flow out more rapidly under the combined effect of centrifugal force generated by the fan 100 and the dust's own gravity during fan rotation. This improves the sand-discharging effect of the fan 100, ensures its safe operation, and extends the vehicle's service life. Meanwhile, the arrangement of multiple sand discharge holes 112 and sand discharge outlets 321 can facilitate the increase of airflow between the air intake side a and the air outlet side b, increase the heat dissipation effect on the engine or drive motor in the front compartment, and can create a negative pressure environment on the air outlet side b of the fan 100 to increase the air recirculation and heat dissipation of the motor 50 of the fan 100.

[0109] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0110] In the description of this invention, "first feature" and "second feature" may include one or more of the features. In the description of this invention, "a plurality of" means two or more. In the description of this invention, "above" or "below" the second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them. In the description of this invention, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0111] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0112] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wheel hub, characterized in that include: The mounting part has an air inlet side and an air outlet side on both sides along the axial direction of the mounting part, and at least one sand discharge hole is formed on the mounting part, the sand discharge hole penetrating the mounting part; A drainage surface is formed on the mounting part. The drainage surface is inclined along the direction from the air inlet side to the air outlet side. The drainage surface is a continuous inclined surface and extends circumferentially along the mounting part. The drainage surface is used to guide sand and dust to the outer periphery of the mounting part for discharge when the hub rotates by centrifugal force. A sand discharge hole is formed on the drainage surface. The central axis of the sand discharge hole is parallel to the central axis of the mounting part along the direction from the air inlet side to the air outlet side. The airflow in the sand discharge hole can blow away the sand and dust on the drainage surface located on the air outlet side.

2. The wheel hub of claim 1, wherein, The drain surface faces the air outlet side, and along the direction from the air inlet side to the air outlet side, the drain surface is inclined in a direction away from the central axis of the mounting part.

3. The wheel hub of claim 1, wherein, The drain surface faces the air inlet side, and along the direction from the air inlet side to the air outlet side, the drain surface is inclined toward the central axis of the mounting part.

4. The wheel hub of claim 1, wherein, The hub also includes: A sand-blocking structure is provided on the air outlet side of the mounting part, and at least one surface of the sand-blocking structure along the circumferential direction of the mounting part is inclined relative to the central axis of the mounting part.

5. The wheel hub of claim 4, wherein, The sand-blocking structure has a first surface and a second surface on its two sides along the circumferential direction of the mounting part, respectively, with the first surface located upstream of the second surface along the rotation direction of the hub. The first surface is parallel to the central axis of the mounting portion, and the second surface is inclined relative to the central axis of the mounting portion.

6. The wheel hub of claim 4, wherein, The sand-blocking structure is multiple, and the multiple sand-blocking structures are arranged at intervals along the circumference of the mounting part; An included angle α is formed between the two adjacent walls of two adjacent sand-blocking structures, wherein the included angle α satisfies: 20°≤α≤30°.

7. The wheel hub of claim 1, wherein, At least one weight-reducing groove is formed on the mounting part, the weight-reducing groove is located on the air inlet side, and the sand discharge hole is formed on the bottom wall of the weight-reducing groove.

8. The wheel hub of claim 7, wherein, The sand discharge hole is located upstream of the weight reduction groove along the rotation direction of the wheel hub.

9. The wheel hub of claim 7, wherein, Along the direction from the air inlet side to the air outlet side, the bottom wall of the weight reduction groove extends obliquely in a direction away from the central axis of the mounting part, and the sand discharge hole is formed on the side of the bottom wall of the weight reduction groove away from the central axis of the mounting part.

10. The wheel hub of claim 1, wherein, At least one through hole is formed on the mounting part, which extends obliquely in a direction from the air inlet side to the air outlet side, and in a direction away from the central axis of the mounting part.

11. The wheel hub of claim 1, wherein, The mounting portion has multiple sand discharge holes, which are arranged at intervals along the circumference of the mounting portion.

12. The wheel hub of claim 1, wherein, The mounting portion has multiple through holes, which are arranged at intervals along the circumference of the mounting portion.

13. The wheel hub of claim 1, wherein, The mounting portion has a plurality of sand discharge holes, a plurality of through holes, and at least one sewage discharge surface. The plurality of sand discharge holes are located on the radial outer side of the plurality of through holes along the mounting portion, and the sewage discharge surface is located on the radial outer side of the plurality of through holes along the mounting portion.

14. The wheel hub of claim 13, wherein, The plurality of sand discharge holes and the plurality of through holes are respectively opposite to each other.

15. The wheel hub of any one of claims 1-14, wherein, The mounting unit includes: Mounting plate, wherein the two sides of the mounting plate along the axial direction are the air inlet side and the air outlet side, respectively; The peripheral wall includes a first sub-wall and a second sub-wall. One end of the first sub-wall is connected to the mounting plate and extends obliquely along the direction from the air inlet side to the air outlet side. The other end of the first sub-wall extends in a direction away from the central axis of the mounting plate. The surface of the first sub-wall adjacent to the central axis of the mounting plate is the sewage discharge surface. One end of the second sub-wall is connected to the other end of the first sub-wall, and the other end of the second sub-wall extends in a direction towards the air inlet side.

16. An impeller, characterized by Includes the wheel hub according to any one of claims 1-15.

17. A fan, comprising: include: A wind shield, wherein an opening is formed on the wind shield; An impeller, the impeller according to claim 16, wherein the impeller is disposed at the opening.

18. The fan of claim 17, wherein, The opening is provided with a windproof ring, and a sand discharge port is formed at the bottom of the windproof ring, which is opposite to the impeller.

19. The fan of claim 18, wherein, Also includes: A sand discharge valve is provided at the sand discharge port. The sand discharge port opens when the force exerted by the fluid at the sand discharge port on the sand discharge valve reaches the opening force of the sand discharge valve, and closes when the force exerted by the fluid at the sand discharge port on the sand discharge valve does not reach the opening force of the sand discharge valve.

20. The fan of claim 19, wherein, The sand discharge valve includes: A sand discharge baffle is provided at the sand discharge port in an openable and closable manner, and the sand discharge baffle is rotatably connected to the windproof ring; At least one resilient reset element is provided, the resilient reset element being configured to keep the sand discharge baffle normally closed.

21. The fan of claim 20, wherein, Further includes: At least one rotating shaft is rotatably mounted on the windproof ring, the sand discharge baffle is connected to the rotating shaft, and the elastic reset member is sleeved on the rotating shaft to drive the sand discharge baffle to open and close the sand discharge port.

22. The fan of any of claims 17-21, wherein, Further includes: An electric motor is provided at the mounting portion, the electric motor includes a rotor, and the mounting portion is connected to the rotor.

23. A vehicle characterized by comprising: Includes the fan according to any one of claims 17-22.

Images