Hub shield, fan blade and vehicle

Abstract

The utility model provides a hub shield, a fan blade and a vehicle, the hub shield is used for being installed in a hub of the fan blade, the hub shield comprises a shield body, the inner peripheral wall of the shield body is in the shape of a circular truncated cone, and the end, with the larger diameter, of the inner peripheral wall is located at the end, provided with an opening, of the hub. According to the hub protective cover, the inner peripheral wall of the protective cover body is arranged to be in the shape of the circular truncated cone, after the protective cover body is installed on a fan blade, the end, with the larger diameter, of the inner peripheral wall is located at the end, with the opening, of the hub, and in the rotating process of the fan blade, soil, sand, dust and other sundries entering the hub are prevented from entering the hub under the action of centrifugal force; the fan blade protective cover does not need to be manually cleaned, saves time and labor, can well prevent the fan blade from shaking in the operation process, prolongs the service life of the fan blade, can enhance the structural strength of a hub part, is applied to an engine cooling system of a vehicle, and can improve the driving and riding comfort.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cooling system, and in particular to a hub shield. Meanwhile, the utility model also relates to a fan blade provided with the hub shield, and a vehicle using the fan blade. Background Art

[0002] The vehicle's engine cooling system is a forced circulation water cooling system, which uses a water pump to increase the pressure of the coolant and force the coolant to circulate in the engine. The cooling system includes a radiator and a cooling fan, wherein the radiator is connected to the cooling circuit, and the cooling fan is driven by a motor to generate air flow through the radiator to improve the heat dissipation effect of the radiator.

[0003] However, during vehicle driving, especially in harsh road conditions such as deserts and gravel, sand and gravel can easily enter the fan hub because a certain gap is reserved in the circumferential direction when the fan hub is fixedly connected to the fan motor. If mud, sand, dust, gravel and other debris will splash and invade the fan hub shield, as the debris accumulates on the inner side of the hub of the hub shield, the imbalance of the rotating fan blades will be sharply worsened, and the debris entering the hub is difficult to discharge, which will cause the fan blades to deform, the fan to shake violently, and the front-end cooling module to shake. In severe cases, the whole vehicle will shake significantly, and even cause coolant leakage, affecting the comfort of passengers and vehicle safety.

[0004] When abnormal vibration occurs during vehicle driving, it is difficult for users to detect the cause of abnormal vibration of the vehicle because the debris may disappear during the process of fan speed reduction until it stops. That is, the abnormal vibration phenomenon perceived during driving will disappear after the vehicle stops. This problem is somewhat hidden. If the debris does not completely disappear during the process of fan speed reduction until it stops, the usual way to solve the above problem is to stop the vehicle and clean up the debris that has entered the fan, which is time-consuming and laborious. Utility Model Content

[0005] In view of this, the utility model aims to provide a wheel hub guard, which can achieve a better effect of discharging debris entering the wheel hub.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A hub guard, the hub guard is used to be installed in the hub of a wind blade;

[0008] The hub shield comprises a shield body, the inner circumferential wall of the shield body is in a truncated cone shape, and the end of the inner circumferential wall with a larger diameter is located at the end of the hub with an opening.

[0009] Furthermore, the angle between the generatrix (a) of the inner circumferential wall and the axis (b) of the inner circumferential wall is greater than or equal to 30°.

[0010] Furthermore, the angle between the generatrix (a) of the inner circumferential wall and the axis (b) of the inner circumferential wall is between 30° and 35°.

[0011] Furthermore, a plurality of heat-conducting ribs are provided on the inner circumferential wall, and the plurality of heat-conducting ribs are distributed at intervals in the circumferential direction of the inner circumferential wall.

[0012] Furthermore, the number of the thermal conductive ribs is between 4 and 8; and / or,

[0013] A plurality of reinforcing ribs are arranged on the inner peripheral wall of the shield body, and the reinforcing ribs and the heat conducting ribs are alternately arranged in the circumferential direction of the inner peripheral wall.

[0014] Furthermore, the heat-conducting rib extends from an end of the inner circumferential wall with a smaller diameter to an end of the inner circumferential wall with a larger diameter, and is arranged to be inclined in the opposite direction to the rotation direction of the hub shield.

[0015] Furthermore, the inclination angle of the thermal rib is greater than or equal to 3°.

[0016] Furthermore, the shield body is provided with a mounting portion, and the hub shield is detachably mounted in the hub of the fan blade via the mounting portion; and / or,

[0017] The shield body is annular, the end of the inner peripheral wall with a smaller diameter is used to press against the hub panel of the fan blade, and the end of the inner peripheral wall with a larger diameter is used to connect with the open end of the hub.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The wheel hub shield described in the utility model sets the inner circumferential wall of the shield body into a truncated cone shape. After it is installed on the fan blade, the end of the inner circumferential wall with a larger diameter is located at the end of the wheel hub with an opening. During the rotation of the fan blade, dirt, dust and other debris entering the wheel hub will be released from the open end of the wheel hub along with the truncated cone-shaped inclined surface of the shield body under the action of centrifugal force. No manual cleaning is required, which saves time and effort. It can better prevent the fan blade from shaking during operation, extend the service life of the fan blade, and strengthen the structural strength of the wheel hub. The existing structure is slightly modified or there is no need to change the existing fan blade structure. It has good practicality and is applied to the engine cooling system of the vehicle to improve the driving comfort.

[0020] In addition, limiting the angle between the generatrix of the inner circumferential wall of the hub and the axis of the inner circumferential wall to be greater than or equal to 30° facilitates the automatic discharge of debris during the operation of the fan blades, and limiting the angle between the generatrix of the inner circumferential wall and the axis of the inner circumferential wall to between 30°-35° can better facilitate the discharge of debris and occupy less space.

[0021] In addition, the multiple heat-conducting ribs can achieve a better heat dissipation effect, and limiting the inclination angle of the heat-conducting ribs further facilitates the discharge of debris during the rotation of the hub shield. Limiting the number of heat-conducting ribs can help reduce the retention of debris such as sand and gravel on the basis of meeting the heat dissipation performance of the motor, and can effectively reduce the imbalance of the fan blade rotation, thereby helping to prevent a series of problems caused by the imbalance of the fan blade. Alternating the heat-conducting ribs and the reinforcing ribs is conducive to improving the structural strength of the hub shield and ensuring the smooth rotation of the fan blade.

[0022] The shield body is detachably mounted in the hub of the fan blade, which is convenient for disassembly and maintenance. The end with a smaller diameter of the inner peripheral wall is pressed against the hub panel of the fan blade, and the end with a larger diameter of the inner peripheral wall is tightly connected to the open end of the hub, which can prevent debris from entering the gap between the hub shield and the hub and facilitate the smooth automatic discharge of debris.

[0023] Meanwhile, another object of the utility model is to provide a fan blade, wherein the hub of the fan blade is provided with the hub guard as described above.

[0024] The fan blade of the utility model can automatically remove dirt, sand, dust and other debris that enter the wheel hub by applying the above-mentioned wheel hub shield, without the need for manual cleaning, thus saving time and effort, and also helping to reduce the shaking of the fan blade during operation, thereby extending the service life of the fan blade.

[0025] In addition, another object of the present invention is to provide a vehicle, wherein the engine cooling system of the vehicle comprises a fan, and the fan is provided with the fan blades as described above.

[0026] The vehicle described in the utility model can prevent the engine cooling system from shaking and abnormal vibration of the vehicle due to the entry of debris into the fan blades by applying the above-mentioned fan blades to its engine cooling system, and can also prevent problems such as coolant leakage caused by shaking, thereby improving the comfort and safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0028] Figure 1 This is an exploded view of the wheel hub guard in the application state according to the first embodiment of the present utility model;

[0029] Figure 2 It is a cross-sectional view of the wheel hub shield in the application state according to the first embodiment of the utility model;

[0030] Figure 3 This is a schematic structural diagram of the wheel hub guard according to the first embodiment of the utility model;

[0031] Figure 4 for Figure 3 Schematic diagram of the structure from another perspective;

[0032] Figure 5 This is a front view of the wheel hub guard described in Embodiment 1 of the present utility model;

[0033] Figure 6 For along Figure 5 Partial cross-sectional view along line AA;

[0034] Figure 7 This is a schematic diagram of the structure of the fan blade described in Example 2 of the utility model.

[0035] Description of reference numerals:

[0036] 1. Wind blade;

[0037] 101, wheel hub; 102, wheel hub panel; 103, blades; 104, wind protection ring;

[0038] 1021, first connection hole; 1022, second connection hole; 1023, heat dissipation hole;

[0039] 201, shield body; 202, heat conducting ribs; 203, reinforcing ribs; 204, mounting portion;

[0040] 2011, first flange; 20111, notch; 2012, second flange;

[0041] 2041, first clamping portion; 2042, second clamping portion;

[0042] a. Busbar; b. Axis line. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0047] Embodiment 1

[0048] The present embodiment relates to a hub shield, which can be installed in the hub 101 of the fan blade 1 to facilitate the automatic discharge of debris entering the hub 101 of the fan blade 1, so as to ensure the safe and stable operation of the fan blade 1 and prevent the fan blade 1 from shaking.

[0049] Based on the above design concept, a structure of the hub guard in the application state of the present embodiment is as follows Figure 1 and Figure 2 As shown, the exemplary structure of the hub shield of this embodiment is as follows Figures 3 to 5 As shown, it is used to be installed in the hub 101 of the fan blade 1. In terms of overall structure, the hub shield mainly includes a shield body 201, the inner peripheral wall of the shield body 201 is in a truncated cone shape, and the end of the inner peripheral wall with a larger diameter is located at the end of the hub 101 with an opening, so as to facilitate the automatic discharge of debris entering the hub 101 from the opening.

[0050] It should be noted that the reason why the end with a larger diameter of the inner peripheral wall is located at the end of the hub 101 with an opening is that a hub panel 102 is generally provided on the hub 101 of the fan blade 1, and the hub panel 102 is generally provided at one end of the hub 101, and the other end of the hub 101 is provided with an opening, that is, the hub 101 generally has only one opening. During the rotation of the fan blade 1, external debris such as sand and stone generally enters the space surrounded by the hub 101 and the hub panel 102 from the opening, so the shape and arrangement of the inner peripheral wall are limited, and when the fan blade 1 rotates, it can be better to facilitate the debris entering the hub 101 to be automatically discharged from the opening.

[0051] From the current traditional design, the structure of the hub 101 is cylindrical. However, in this design, when sand enters the hub 101, most of the debris entering the hub 101 cannot be automatically discharged during the startup and operation of the fan blade 1, resulting in obvious shaking of the fan blade 1 during operation. Therefore, in this embodiment, the end with a larger diameter of the inner circumferential wall of the hub shield is located at the end of the hub 101 with an opening, which can facilitate the automatic discharge of debris. It should be understood that the end with a larger diameter of the inner circumferential wall is closer to the opening than the end with a smaller diameter, which can be understood as the end with a larger diameter of the inner circumferential wall is located at the end of the hub 101 with an opening.

[0052] Through experiments, it was found that by installing a hub guard in the hub 101, setting the inner wall of the hub guard to a truncated cone shape, and installing it into the hub 101 in a set direction, the hub guard can achieve a better effect of automatically discharging debris entering the hub 101 from the opening during the rotation of the fan blade 1.

[0053] As a preferred embodiment, the angle between the generatrix a of the inner peripheral wall and the axis b of the inner peripheral wall is greater than or equal to 30°, so as to facilitate the automatic discharge of debris during the operation of the fan blade 1. Theoretically, the larger the angle, the better the effect of automatic discharge of debris, but considering factors such as installation space, preferably, the angle between the generatrix a of the inner peripheral wall and the axis b of the inner peripheral wall is between 30°-35°, such as 31°, 32°, 33°, 34° or 35°, which can better facilitate the discharge of debris and occupy less space.

[0054] In a preferred embodiment, the wall thickness of the shield body 201 is uniform, so less material is used and the weight is light. It is understandable that the shape of the outer peripheral wall of the shield body 201 is not specifically limited here, such as it can be a truncated cone or other shapes. When the shield body 201 is installed in the wheel hub 101, the outer peripheral wall is preferably easy to install and has little impact on the existing wheel hub 101 structure.

[0055] As a preferred embodiment, Figure 3 , Figure 5 and Figure 6As shown, a plurality of heat-conducting ribs 202 are provided on the inner peripheral wall of the shield body 201, and the extension direction of each heat-conducting rib 202 is along the extension direction of the generatrix a of the shield body 201, and the plurality of heat-conducting ribs 202 are distributed at intervals in the circumferential direction of the inner peripheral wall. In addition, the plurality of heat-conducting ribs 202 can achieve a better heat dissipation effect, and the inclination angle of the heat-conducting ribs 202 is limited, which further facilitates the discharge of debris during the rotation of the hub shield.

[0056] In a preferred embodiment, the number of the heat-conducting ribs 202 is between 4 and 8, such as 4, 5, 6, 7 or 8. The number of the heat-conducting ribs 202 is limited here to reduce the retention of debris such as sand and gravel on the basis of meeting the heat dissipation performance of the motor, and can effectively reduce the imbalance of the rotation of the fan blade 1, thereby helping to prevent a series of problems caused by the imbalance of the fan blade 1. It is understandable that the number of the heat-conducting ribs 202 is not limited to 4-8, and other values ​​are also feasible, such as Figure 5 In an exemplary structure, the number of thermal ribs 202 is 9.

[0057] In this embodiment, the number of the heat-conducting ribs 202 is preferably triangular, and along the axial direction of the hub shield, the middle portion of the heat-conducting ribs 202 protrudes inwardly in the radial direction of the hub shield to a greater extent, which can achieve a better heat dissipation effect and help to strengthen the structural strength of the hub shield. It is understandable that the shape of the heat-conducting ribs 202 is also feasible, such as square or semicircular.

[0058] In a preferred embodiment, the heat conducting rib 202 extends from the end of the inner peripheral wall with a smaller diameter to the end of the inner peripheral wall with a larger diameter, and is inclined in the opposite direction of the rotation direction of the fan blade 1. Figure 1 The rotation direction of the fan blade 1 is shown in the figure, and the inclination angle of the heat-conducting rib 202 is greater than or equal to 3°, so as to facilitate the smooth automatic discharge of debris.

[0059] In a preferred embodiment, in order to facilitate the automatic discharge of debris, the inclination angle of the heat conductive rib 202 is preferably set between 3° and 6°, such as 3°, 4°, 5° or 6°. When the angle is less than 3°, the effect of automatic discharge of debris is poor. In theory, the larger the angle, the better. Considering the feasibility of the injection molding process, the angle is preferably 4.5°. Here, by limiting the inclination angle of the heat conductive rib 202, in addition to further facilitating the discharge of debris during the rotation of the fan blade, it is also beneficial to the injection molding process of the fan blade.

[0060] As a preferred embodiment, a plurality of reinforcing ribs 203 are provided on the inner circumferential wall of the shield body 201, and the reinforcing ribs 203 and the heat conducting ribs 202 are alternately arranged in the circumferential direction of the inner circumferential wall to improve the structural strength of the hub shield and ensure the smooth rotation of the fan blade 1.

[0061] As in this embodiment, the extension direction of the reinforcing rib 203 is consistent with the extension direction of the busbar a of the shield body 201. It protrudes evenly from the inner wall toward the center of the shield, similar to a convex ridge, which can better strengthen the structural strength of the shield body 201 and prevent debris from staying in the wheel hub 101, which is conducive to the smooth and automatic discharge of debris.

[0062] In addition, in this embodiment, two reinforcing ribs 203 are arranged between each two adjacent heat-conducting ribs 202 to take into account both the effect of strengthening the structural strength and the effect of automatically discharging debris. It should be understood that the number of reinforcing ribs 203 between each two adjacent heat-conducting ribs 202 can also be set to other numbers, such as 1, and the shape of the heat-conducting rib 202 can also be set to other shapes.

[0063] In this embodiment, the hub shield can be made of metal or plastic, such as aluminum, aluminum alloy, etc., and plastic such as PA6-GF30, etc., which can be formed by injection molding. When the hub shield is made of plastic material, it can be welded to the hub 101 of the fan blade 1, for example.

[0064] As a preferred embodiment, the hub shield is provided with a mounting portion 204, and the shield body 201 is detachably mounted in the hub 101 of the fan blade 1 via the mounting portion 204, which is convenient for disassembly and maintenance. For example, in this embodiment, the shield body 201 is snap-fitted and mounted in the hub 101 of the fan blade 1.

[0065] like Figure 1 and Figure 2 As shown, a first flange 2011 and a second flange 2012 are provided at both ends of the shield body 201. The first flange 2011 is provided at the end with a larger diameter of the shield body 201, and extends radially outward along the shield body 201. The second flange 2012 is provided at the end with a smaller diameter of the shield body 201, and extends radially inward along the shield body 201.

[0066] The aforementioned mounting portion 204 includes a first clamping portion 2041 and a second clamping portion 2042. Figure 2 Combination Figure 4 As shown, the first clamping portion 2041 is arranged on the second flange 2012, which is annular as a whole and protrudes toward the side of the hub panel 102, and a first clamping groove is correspondingly provided on the fan blade 1. When the hub cover is installed, the first clamping portion 2041 can be clamped in the first clamping groove.

[0067] The second clamping portion 2042 is arranged on the first flange 2011. Since the first flange 2011 is provided with a plurality of notches 20111, there are a plurality of second clamping portions 2042. The plurality of second clamping portions 2042 are arranged at intervals in the circumferential direction of the first flange 2011, and a second clamping groove is correspondingly provided on the fan blade 1. When the hub guard is installed, the second clamping portion 2042 can be clamped in the second clamping groove.

[0068] It is understandable that the shapes and structures of the first clamping portion 2041 and the second clamping portion 2042 are not limited thereto, and they can be firmly clamped and installed on the hub 101 of the fan blade 1. In actual design, the existing structure of the fan blade 1 should be less affected.

[0069] As a preferred embodiment, Figure 2 As shown, the shield body 201 is annular. Regardless of whether the hub shield and the hub 101 are detachably connected or non-detachably connected, it is preferred to ensure that the end with a smaller diameter of the inner circumferential wall is used to press against the hub panel 102 of the wind blade 1, and the end with a larger diameter of the inner circumferential wall is used to be tightly connected to the open end of the hub 101, that is, a seamless connection. This can prevent debris from entering the gap between the hub shield and the hub 101 and facilitate the automatic discharge of debris.

[0070] As in this embodiment Figure 2 As shown, the first flange 2011 and the second flange 2012 are provided for better matching with the existing wheel hub 101 and can play a role in strengthening the structural strength of the wheel hub shield. The first flange 2011 can be provided to more conveniently provide the second clamping portion 2042, and the second flange 2012 can be provided to more conveniently provide the first clamping portion 2041. It can be understood that it is also possible not to provide the first flange and the second flange 2012, as long as both ends of the inner peripheral wall are ensured to be tightly and seamlessly connected to the wheel hub 101.

[0071] The wheel hub shield of the present embodiment has an inner circumferential wall of the shield body 201 set to a truncated cone shape. After being installed on the fan blade 1, the end of the inner circumferential wall with a smaller diameter presses against the wheel hub panel 102 of the fan blade 1. During the rotation of the fan blade 1, dirt, dust and other debris entering the wheel hub 101 from the open end of the wheel hub 101 will escape from the open end along the truncated cone-shaped inclined surface of the shield body 201 under the action of centrifugal force. No manual cleaning is required, which saves time and effort. It can better prevent the fan blade 1 from shaking during operation, extend the service life of the fan blade 1, and strengthen the structural strength of the wheel hub 101. Little change is made to the existing structure or there is no need to change the existing fan blade 1 structure, and it has good practicality. It is applied to the engine cooling system of a vehicle to improve driving comfort.

[0072] Embodiment 2

[0073] This embodiment relates to a fan blade 1, such as Figure 7 As shown, it mainly includes a hub 101 and blades 103 arranged on the outer peripheral wall of the hub 101, and a wind protection ring 104 connecting multiple blades 103 together. The hub 101 of the fan blade 1 is provided with a hub shield as in the first embodiment. The fan blade 1 of this embodiment, by using the hub shield as in the first embodiment, can automatically remove dirt, sand and dust and other debris entering the hub 101, without the need for manual cleaning, saving time and labor, and also helping to reduce the shaking of the fan blade 1 during operation, thereby extending the service life of the fan blade 1.

[0074] It should be noted here that Figure 7 The fan blade 1 shown is Figure 1 The structures of the wind blades 1 shown are substantially the same, the difference being that the bending directions of the blades 103 are different, so that the rotation directions of the two wind blades 1 are different, but both can apply the hub guard of the first embodiment.

[0075] In order to facilitate the installation of the hub shield on an external carrier (such as the output shaft of the motor), a connecting portion is provided on the hub panel 102. As a preferred embodiment, there are multiple groups of connecting portions, and the multiple groups of connecting portions are respectively used to install the hub shield on different external carriers.

[0076] like Figure 7 As shown in , the wind blade 1 includes a hub panel 102, which is located at an end of the hub 101 away from the opening. Two groups of connection parts are provided on the hub panel 102, and the two groups of connection parts are respectively located on circles of different diameters, and multiple connection parts of the same group are distributed at intervals in the circumferential direction of the same circle. Specifically, one group of connection parts includes three first connection holes 1021, and the other group of connection parts includes three second connection holes 1022. Relatively speaking, the three first connection holes 1021 are located on a circle with a larger diameter, and the three second connection holes 1022 are located on a circle with a smaller diameter, so that the hub shield can be applied to multiple external carriers, thereby improving the scope of application of the hub shield.

[0077] It is understandable that the number of groups of the connection portion can be other than two groups, such as three groups or four groups. In addition, the connection portion can adopt other structures such as studs in addition to the hole-shaped structure of the first connection hole 1021 and the second connection hole 1022.

[0078] Without affecting the structural strength, in a preferred embodiment, a plurality of heat dissipation holes 1023 are further provided on the hub panel 102 to improve the heat dissipation performance, thereby facilitating the heat dissipation of the motor.

[0079] In addition, the present embodiment also relates to an engine cooling system, which includes a motor and a fan connected to the motor. The fan is driven by the motor and is provided with the above-mentioned fan blades 1.

[0080] The engine cooling system of this embodiment can effectively prevent the engine cooling system from shaking by applying the above-mentioned fan blades 1, and has better practicality.

[0081] In addition, the present embodiment also relates to a vehicle, on which the above engine cooling system is provided.

[0082] The vehicle of this embodiment, by applying the above engine cooling system, can prevent abnormal vibration of the vehicle caused by debris entering the fan blade 1, and can prevent problems such as coolant leakage caused by shaking, thereby improving the comfort and safety of the vehicle.

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wheel hub guard, characterized in that: The hub guard is used to be installed in the hub (101) of the fan blade (1); The wheel hub shield comprises a shield body (201), the inner peripheral wall of the shield body (201) is in a truncated cone shape, and the end of the inner peripheral wall with a larger diameter is located at the end of the wheel hub (101) provided with an opening.

2. The wheel hub guard according to claim 1, characterized in that: The angle between the generatrix (a) of the inner circumferential wall and the axis (b) of the inner circumferential wall is greater than or equal to 30°.

3. The wheel hub guard according to claim 2, characterized in that: The angle between the generatrix (a) of the inner circumferential wall and the axis (b) of the inner circumferential wall is between 30° and 35°.

4. The wheel hub guard according to claim 1, characterized in that: A plurality of heat-conducting ribs (202) are arranged on the inner peripheral wall, and the plurality of heat-conducting ribs (202) are distributed at intervals in the circumferential direction of the inner peripheral wall.

5. The wheel hub guard according to claim 4, characterized in that: The number of the thermal conductive ribs (202) is between 4 and 8; and / or, A plurality of reinforcing ribs (203) are provided on the inner peripheral wall, and the reinforcing ribs (203) and the heat conducting ribs (202) are arranged alternately in the circumferential direction of the inner peripheral wall.

6. The wheel hub guard according to claim 4, characterized in that: The heat conducting rib (202) extends from an end of the inner peripheral wall with a smaller diameter to an end of the inner peripheral wall with a larger diameter, and is arranged to be inclined in the opposite direction to the rotation direction of the hub shield.

7. The wheel hub guard according to claim 6, characterized in that: The inclination angle of the heat conducting rib (202) is greater than or equal to 3°.

8. The wheel hub shield according to any one of claims 1 to 7, characterized in that: The shield body (201) is provided with a mounting portion (204), and the hub shield is detachably mounted in the hub (101) of the fan blade (1) via the mounting portion (204); and / or, The shield body (201) is annular, the end of the inner peripheral wall with a smaller diameter is used to press against the hub panel (102) of the fan blade (1), and the end of the inner peripheral wall with a larger diameter is used to be tightly connected to the open end of the hub (101).

9. A fan blade, characterized in that: A hub guard according to any one of claims 1 to 8 is arranged inside the hub (101) of the wind blade (1).

10. A vehicle, characterized in that: The engine cooling system of the vehicle comprises a fan, on which the fan is provided with the fan blade (1) according to claim 9.

Images