Protective net, fan and vehicle

Abstract

The utility model provides a protective net, a fan and a vehicle, the protective net relates to the technical field of engine radiating systems, the protective net is used for being installed on a fan support of the fan, the fan is used for being installed on one side of an engine radiator, and a plurality of sets of protective blades are arranged on the protective net. Each group of protection blades comprises a plurality of protection blades, the plurality of protection blades in each group are arranged at intervals in the circumferential direction of the annular area, the plurality of groups of protection blades are sequentially arranged in the radial direction of the annular area, and the arrangement density of the protection blades in the plurality of groups of protection blades is sequentially reduced from the edge of the annular area to the center of the annular area. According to the protective net, the arrangement density of the protective blades in each group of protective blades is adjusted, so that the conflict between the protective effect and heat dissipation and ventilation is balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cooling systems, and in particular to a protective net. The utility model also relates to a fan equipped with the protective net, and a vehicle equipped with the fan. Background Art

[0002] During vehicle operation, especially in harsh road conditions like deserts and gravel, sand and gravel can easily enter the fan hub due to the circumferential gap between the fan hub and the fan motor. Centrifugal force can trap these foreign objects in the hub, causing imbalance in the fan blades. In severe cases, this can even lead to blade deformation, severe vibration of the front-end cooling module, and coolant leaks.

[0003] At present, the radiator protection structure used on vehicles usually installs a protective net on the front side of the radiator to block sand and gravel. However, due to the arrangement of the protective blades of the existing protective net, the protective blades are either unable to effectively intercept all the sand and gravel rebounded by the fan impact, resulting in poor protection effect and easy damage to the radiator, or the airflow resistance generated by the protective blades is large, affecting the normal heat dissipation of the radiator core. Therefore, it is difficult for this type of protective net to take into account both protection effect and heat dissipation and ventilation performance at the same time. Utility Model Content

[0004] In view of this, the present invention aims to provide a protective net to achieve the purpose of taking into account both protective performance and ventilation performance.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0006] A protective net is used to be mounted on a fan bracket of a fan, wherein the fan is used to be mounted on one side of an engine radiator;

[0007] The protective net is provided with a plurality of groups of protective blades, each group of protective blades includes a plurality of protective blades, and the plurality of protective blades in each group are arranged along the circumferential spacing of the annular area;

[0008] The plurality of groups of protective blades are sequentially arranged along the radial direction of the annular area, and the arrangement density of the protective blades in the plurality of groups of protective blades decreases sequentially from the edge to the center of the annular area.

[0009] Furthermore, the arrangement of each protective blade must satisfy the formula β>α; wherein β is the angle formed by the line connecting the inner edge a and the outer edge b of adjacent protective blades and the end face of the engine radiator, and α is the angle formed by the gravel path and the end face of the engine radiator.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] The protective net described in this utility model is used to effectively protect the engine radiator. Specifically, the net comprises multiple sets of protective blades, each set comprising multiple blades. These blades are arranged at intervals along the circumference of a circular area, forming a continuous, annular protective barrier. The density of the blades decreases from the edge to the center of the circular area, with a higher density at the edges and a lower density near the center. However, the net is still able to block granular objects such as sand and gravel while reducing airflow obstruction caused by the blades, thereby achieving a balance between protective and ventilation performance.

[0012] Secondly, limiting the arrangement of each protective blade can ensure that granular objects such as sand and gravel rebounded by the wind blades cannot pass through the protective net, which increases the reliability of protection, maximizes the protection effect and reduces ventilation resistance.

[0013] In addition, another object of the present invention is to provide a fan, comprising a fan bracket, a blade drive, blades and the aforementioned protective net; the fan is mounted to one side of the engine radiator through the fan bracket, and the protective net is provided on the side of the fan bracket facing the engine radiator; the blade drive is mounted on the fan bracket, and the power output end of the blade drive is connected to the blade.

[0014] Furthermore, the protective net is mounted on the fan bracket via a plurality of snap-fit ​​structures, and the plurality of snap-fit ​​structures are arranged at intervals around the circumference of the protective net.

[0015] Furthermore, each of the clamping structures includes a clamping portion provided on the fan bracket and a clamping hole provided on the protective net; each of the clamping portions includes two clamping parts arranged at intervals, and a clamping head is provided on the opposite sides of the two clamping parts, and each of the clamping parts passes through the clamping hole through the clamping head.

[0016] Furthermore, a hub guard is provided in the hub of the fan blade, the inner peripheral wall of the hub guard is in a truncated cone shape, and the end with a larger diameter of the inner peripheral wall is connected to the open end of the hub;

[0017] A groove is provided between the wheel hub and the wheel hub shield, the opening of the groove faces away from the end of the wheel hub provided with the opening, and a blocking cover is provided at the opening.

[0018] Furthermore, the angle between the generatrix of the inner peripheral wall and the axis of the inner peripheral wall is between 30° and 35°.

[0019] Furthermore, the inner circumferential wall is provided with a plurality of heat-conducting ribs and a plurality of reinforcing ribs, and the plurality of reinforcing ribs and the plurality of heat-conducting ribs are alternately arranged in the circumferential direction of the inner circumferential wall;

[0020] The number of the thermal conductive ribs is between 4 and 8, and the inclination angle of the thermal conductive ribs is greater than or equal to 3°;

[0021] The heat conducting rib 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 tilted in the opposite direction to the rotation direction of the hub shield.

[0022] Furthermore, the hub shield is annular and is formed integrally with the fan blade; the blocking cover and the hub panel of the fan blade are integrated into an integral structure.

[0023] The fan has the same beneficial effects as the aforementioned protective net relative to the prior art by applying the aforementioned protective net. By installing this fan on one side of the engine radiator, the engine radiator can be effectively protected, which is beneficial to increasing the service life of the engine radiator.

[0024] Attaching the protective net to the fan bracket via multiple clip-on structures ensures that the net is evenly supported and secured in all directions. This allows the net to be securely mounted on the fan bracket, preventing it from loosening or falling off during fan operation. These clip-on structures create a reliable connection between the net and the fan bracket, improving the stability and safety of the entire fan system. Multiple clip-on structures are arranged at intervals around the circumference of the net. These circumferentially arranged clip-on structures also help disperse external impact forces on the net, improving its impact resistance. Furthermore, the clip-on structures offer the advantages of a simple structure and quick assembly and disassembly, allowing users to easily disassemble and assemble the net according to their needs, reducing installation and disassembly costs and time.

[0025] Furthermore, the clamping structure includes two clamping parts, which are clamped into the clamping holes through the two clamping parts. When the clamping head completely passes through the clamping hole, it will be clamped in the clamping hole to form a stable connection. When the protective net needs to be removed, pinch the two clamping joints to remove the clamping head of the clamping part from the clamping hole, and disassembly is also relatively simple.

[0026] The inner circumferential wall of the hub guard is configured to be truncated cone-shaped. After being installed on the fan blade, the end with the larger diameter of the inner circumferential wall is located at the open end of the hub. During the rotation of the fan blade, dirt, sand, and other debris entering the hub will be ejected from the open end of the hub along the truncated cone-shaped inclined surface of the hub guard under the action of centrifugal force, eliminating the need for manual cleaning, saving time and effort. This can effectively prevent the fan blade from vibrating during operation, extend the service life of the fan blade, and enhance the structural strength of the hub. It can be used in the vehicle's engine cooling system to improve driving comfort. The end with the larger diameter of the inner circumferential wall is connected to the open end of the hub. A groove is provided between the hub and the hub guard, with the opening of the groove facing away from the open end of the hub. A blocking cover is provided at the opening to prevent debris from entering the groove and facilitate its automatic discharge.

[0027] Furthermore, limiting the angle between the busbar of the inner peripheral wall and the axis of the inner peripheral wall to between 30° and 35° can better facilitate the automatic discharge of debris during the operation of the fan blades and occupy less space.

[0028] Alternating the thermal ribs and reinforcing ribs improves the hub guard's structural strength and ensures smooth blade rotation. Multiple thermal ribs provide effective heat dissipation, while limiting the rib inclination angle further facilitates the removal of debris during hub guard rotation. Limiting the number of thermal ribs helps reduce the accumulation of debris, such as sand and gravel, while ensuring proper motor heat dissipation. This effectively reduces blade rotation imbalance, thereby preventing a range of issues caused by blade imbalance.

[0029] The hub guard is annular and is integrally formed with the fan blade, which is easy to process and has a low processing cost. The blocking cover and the hub panel of the fan blade are integrated into an integrated structure, which has a low processing cost and is relatively easy to install.

[0030] In addition, another object of the present invention is to provide a vehicle, wherein the engine cooling system of the vehicle includes an engine radiator and the fan as described above arranged on one side of the engine radiator.

[0031] The vehicle described in the present invention, by adopting the above-mentioned fan, can prevent abnormal vibration of the vehicle caused by debris entering the fan blades, and can prevent problems such as coolant leakage caused by shaking, which is beneficial to improving the comfort and safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1This is a schematic structural diagram of the protective net according to the first embodiment of the present invention being assembled on a fan bracket;

[0034] Figure 2 for Figure 1 A schematic diagram of the structure shown in another perspective;

[0035] Figure 3 for Figure 2 An enlarged view of the structure shown in E;

[0036] Figure 4 This is a schematic diagram of the overall structure of the protective net according to Example 1 of the present utility model;

[0037] Figure 5 for Figure 4 A cross-sectional view of the structure shown in the FF direction;

[0038] Figure 6 for Figure 5 A magnified view of the structure shown at G in the middle;

[0039] Figure 7 This is a schematic diagram of the path of the blade striking the sand and gravel according to the second embodiment of the present utility model;

[0040] Figure 8 This is a schematic diagram of the rebound path of sand and gravel according to the second embodiment of the present invention;

[0041] Figure 9 This is a schematic structural diagram of the fan blade according to the second embodiment of the present invention;

[0042] Figure 10 for Figure 9 A cross-sectional view of the structure shown in the HH direction;

[0043] Figure 11 This is another structural schematic diagram of the fan blade according to the second embodiment of the present utility model;

[0044] Figure 12 This is a structural schematic diagram of the blocking cover described in Example 2 of the present utility model being assembled on a fan blade.

[0045] Description of reference numerals:

[0046] 11. Fan bracket; 111. Frame; 12. Blade drive; 13. Blade; 131. Blade; 132. Hub; 1321. Hub panel; 1322. Heat dissipation holes; 133. Hub guard; 1331. Heat-conducting rib; 1332. Reinforcement rib; 134. Groove; 135. Cover; 136. Wind shield;

[0047] 14. Protective net; 141. Protective blades; 142. Annular area; 143. Circular area;

[0048] 1421, first connecting ring; 1422, second connecting ring; 1423, third connecting ring; 1424, first annular region; 1425, second annular region;

[0049] 2. Engine radiator;

[0050] 31. Clamping portion; 311. Clamping piece; 312. Clamping head; 32. Clamping hole;

[0051] 4. The rebound path of sand and gravel;

[0052] c. busbar; d. axis;

[0053] β, the angle formed by the line connecting the inner edge a and the outer edge b of adjacent protective blades and the end face of the engine radiator; α, the angle formed by the gravel path and the end face of the engine radiator. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0055] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "back" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0057] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0058] Example 1

[0059] This embodiment relates to a protective net, which adjusts the arrangement density of the protective blades to balance the conflict between the protective effect and the heat dissipation and ventilation. It is used to be installed on the fan bracket 11 of the fan, and the fan is used to be installed on one side of the engine radiator 2.

[0060] In terms of overall structure, combined Figure 1 、 Figure 2 and Figure 4 As shown in , the protection net 14 of this embodiment is provided with multiple groups of protection blades 141 , each group of protection blades 141 includes multiple protection blades 141 , and the multiple protection blades 141 of each group are arranged along the circumferential spacing of the annular area 142 .

[0061] It should be noted that, for example Figure 4 As shown in FIG, the center of the protective net 14 is provided with a hollow circular area 143. A first connecting ring 1421, a second connecting ring 1422, and a third connecting ring 1423 are arranged radially from the center to the edge of the circular area 143. The area surrounded by the first connecting ring 1421 is the circular area 143. A first annular area 1424 is formed between the first and second connecting rings 1421, 1422. A second annular area 1425 is formed between the second and third connecting rings 1422, 1423.

[0062] The annular region 142 of this embodiment includes a first annular region 1424 and a second annular region 1425. The plurality of protective blades 141 within each annular region constitutes a group of protective blades 141. It should be noted that in this embodiment, the number of the annular regions 142 is described as two, and the number of the annular regions 142 may be other numbers, such as three, four, or five.

[0063] At this time, the protective net 14 described in the present invention is used to better protect the engine radiator 2. In terms of specific structure, multiple groups of protective blades 141 are set, each group of protective blades 141 includes multiple protective blades 141, and these protective blades 141 are arranged at circumferential intervals along the circular area 142 to form a continuous, annular protective barrier.

[0064] Among them, multiple groups of protective blades 141 are arranged in sequence along the radial direction of the annular area 142, and from the edge to the center of the annular area 142, the arrangement density of the protective blades 141 in the multiple groups of protective blades 141 decreases successively. Specifically, the arrangement density of the protective blades 141 in any group of protective blades 141 is greater than the arrangement density of the protective blades 141 in each adjacent group of protective blades 141 close to the center.

[0065] Here, from the edge to the center of the annular area 142, the arrangement density of the protective blades 141 in any group of protective blades 141 is greater than the arrangement density of the protective blades 141 in each adjacent group of protective blades 141 close to the center. The density of the protective blades 141 at the edge is higher, while the density of the protective blades 141 close to the center is lower, but they can still block granular objects such as sand and gravel, while reducing the obstruction of the protective blades 141 to the airflow, thereby achieving the purpose of taking into account both protection performance and ventilation performance.

[0066] It should be noted that during the vehicle driving process, Figure 9 As shown, along the radial direction of the fan blade 13, the further away from the rotation center of the fan blade 13 are any locations on the blade 131, the greater the linear velocity of rotation, the greater the rebound impact force of sand and gravel in that area, and the greater the damage to the engine radiator 2. Therefore, in this embodiment, the arrangement density of the protective blades 141 in the second annular region 1425 is high, which helps to improve the reliability of blocking sand and gravel and other granular objects. At the same time, the arrangement density of the protective blades 141 in the first annular region 1424 is low, resulting in lower ventilation resistance.

[0067] At the same time, the protective net 14 in this embodiment is specifically provided with two groups of protective blades 141, and the protective net 14 can be integrally formed by injection molding, thereby facilitating weight reduction and reducing manufacturing costs. During specific implementation, the protective net 14 can be tightly attached to the surface of the radiator core. If necessary, a cable tie can be used to tie and fasten the center area of ​​the protective net 14 and the radiator core heat pipe to ensure fit.

[0068] In addition, the protective net 14 can also be made of metal. At this time, it should be noted that a gap of more than 25 mm must be reserved between the protective net 14 and the fan. Preferably, the gap in this embodiment can be set to 25 mm, 28 mm, or 30 mm, for example.

[0069] Based on the above overall introduction, in this implementation, as a preferred implementation form, Figure 5 and Figure 6 As shown in , the arrangement of each protective blade 141 needs to satisfy the formula β>α, where β is the angle formed by the line connecting the inner edge a and the outer edge b of adjacent protective blades 141 and the end face of the engine radiator 2, and α is the angle formed by the gravel path and the end face of the engine radiator 2.

[0070] Therefore, by limiting the arrangement of each protective blade 141, it can be ensured that granular objects such as sand and gravel rebounded by the wind blade 13 cannot pass through the protective net 14, the protection reliability is higher, and the protection effect can be maximized and the ventilation resistance can be reduced.

[0071] In the specific structure, each protective blade 141 in each group of protective blades 141 is arranged in a spiral shape, which can avoid the accumulation and jam of sand and gravel, thereby promoting the smooth sliding of sand and gravel between the protective blades 141, and the angles between any adjacent protective blades 141 in each group of protective blades 141 are equal.

[0072] For example, in this embodiment, the angle between any adjacent protective blades 141 in the second annular region 1425 is 2°, while the angle between any adjacent protective blades 141 in the first annular region 1424 is 4°.

[0073] Of course, in addition to making the angles between any adjacent protective blades 141 in each group of protective blades 141 equal, it is also acceptable for the angles to be unequal, as long as the angles between the protective blades 141 near the center are greater than the angles between the protective blades 141 near the edge, and the formula β>α is satisfied.

[0074] At the same time, the specific value of the angle between any adjacent protective blades 141 in each group of protective blades 141 can also be designed and adjusted accordingly according to actual blocking requirements, for example, it can be set to 1°, 3°, 5°, 6°, 9°, etc. It is worth mentioning that the inner edge a in this example is the edge of the protective blade 141 close to the engine radiator 2, and the outer edge b is the edge of the protective blade 141 away from the engine radiator 2.

[0075] Taking into account that during the driving of the vehicle, sand and gravel enter from the ground between the fan and the engine radiator 2 from top to bottom, the lower half of each group of protective blades 141 is an area where sand and gravel impact relatively densely, and the upper half is an area where sand and gravel are sparsely distributed. In combination with the above situation, as another preferred implementation form, the arrangement density of each protective blade 141 in the lower half of each group of protective blades 141 is greater than the arrangement density of each protective blade 141 in the upper half, thereby improving the ventilation and heat dissipation effect.

[0076] It should be understood that the upper half of each set of protective blades 141 receives less sand and gravel, and thus only the skeleton 111 in the fan bracket 11 is needed to provide a certain degree of barrier protection. In other embodiments, it is also possible to configure the protective net 14 as a semi-annular structure with protective blades 141 only in the lower half. Of course, in each set of protective blades 141, whether the protective blades 141 are distributed at a lower density in the upper half or at a higher density in the lower half, the condition β>α should be satisfied to ensure the protective effect while improving the ventilation rate of the protective net 14.

[0077] When the protective net 14 of this embodiment is in use, the arrangement density of the protective blades 141 in each group of protective blades 141 is greater than the arrangement density of the protective blades 141 in each adjacent group of protective blades 141 close to the center. Therefore, unlike the conventional mesh plate, which needs to consider using mesh holes smaller than the grain size of sand and gravel to form an effective barrier, the protective blades 141 with an inclined angle to the radiator surface are used in this embodiment. Even when the gap between the protective blades 141 is larger than the grain size of sand and gravel, the barrier protection requirements can still be met, thereby ensuring the ventilation rate of the protective net 14 and forming effective protection for the radiator while meeting the ventilation and heat dissipation requirements.

[0078] Example 2

[0079] This embodiment relates to a fan comprising a fan bracket 11, a blade driver 12, blades 13, and the protective net 14 described in the first embodiment. The fan is mounted to one side of the engine radiator 2 via the fan bracket 11, and the protective net 14 is provided on the side of the fan bracket 11 facing the engine radiator 2. Furthermore, the blade driver 12 is mounted on the fan bracket 11, and the blades 13 are connected to the power output end of the blade driver 12.

[0080] Here, the fan in this embodiment utilizes the protective net 14 in the first embodiment, and has the same beneficial effects as the aforementioned protective net 14 relative to the prior art. By installing this fan on one side of the engine radiator 2, the engine radiator 2 can be effectively protected, thereby improving the service life of the engine radiator 2. The fan drive 12 in this embodiment can be a drive product well known to those skilled in the art, such as a motor.

[0081] It should be noted here that the specific structure of the fan blade 13 of this embodiment can refer to the existing technology, such as the multiple blades 131 arranged on the outer peripheral wall of the hub 132 at circumferential intervals along the hub 132, and the wind shielding ring 136 connecting the multiple blades 131 together.

[0082] Figure 9 The fan blade 13 shown is Figure 11 The structures of the fan blades 13 shown are substantially the same, the difference being that the bending directions of the blades 131 are different, so that the rotation directions of the two fan blades 13 are different, but both can be provided with the hub guard 133 described below.

[0083] Preferably, Figure 11 The structure of the fan blade 13 shown in the figure, that is, each blade 131 is a twisted curved surface structure. When sand and gravel hit the fan blade, they rebound along with the rotation of the fan blade. The rebound path 4 of the sand and gravel is Figure 7 and Figure 8 The line connecting point A and point B.

[0084] In the rotation direction of the fan blade 13, the inclined protective blade 141 is facing the path of sand and gravel hitting. Therefore, when β is greater than α, the adjacent protective blades 141 can form a complete blocking surface for the radiator surface, thereby preventing sand and gravel from passing through the gaps between adjacent protective blades 141 and hitting the radiator surface. On the basis of meeting this condition, the spacing between adjacent protective blades 141 can be increased based on ventilation and heat dissipation needs, thereby achieving a balance between protection effect and heat dissipation and ventilation capacity.

[0085] Secondly, in this embodiment, as a preferred implementation form, Figure 2 As shown, the protection net 14 is mounted on the fan bracket 11 through a plurality of snap-fit ​​structures, and the plurality of snap-fit ​​structures are arranged at intervals around the circumference of the protection net 14 .

[0086] In the specific structure, the clamping structure of this embodiment can be specifically set to six. Of course, in addition to being set to six, corresponding designs and adjustments can also be made according to design clamping requirements, for example, it can be set to one, three, five, etc.

[0087] This arrangement ensures that the protective net 14 can be evenly supported and fixed in all directions, and can firmly install the protective net 14 on the fan bracket 11 to ensure that it will not loosen or fall off during the operation of the fan. Through these snap-fit ​​structures, a reliable connection can be formed between the protective net 14 and the fan bracket 11, thereby improving the stability and safety of the entire fan system.

[0088] At the same time, multiple snap-fit ​​structures are arranged at intervals around the circumference of the protective net 14. These snap-fit ​​structures also help disperse external impact forces on the protective net 14, thereby improving the impact resistance of the protective net 14. Furthermore, the snap-fit ​​structure has the advantages of being simple in structure and quick to assemble and disassemble, allowing users to easily assemble and disassemble the protective net 14 according to their needs, thereby reducing installation costs and time.

[0089] Specifically, in this embodiment, as a preferred implementation form, Figure 3 As shown in the figure, each clamping structure includes a clamping portion 31 provided on the fan bracket 11, and a clamping hole 32 provided on the protective net 14, wherein each clamping portion 31 includes two clamping members 311 arranged at a distance from each other, and a clamping head 312 is provided on the opposite sides of the two clamping members 311, and each clamping member 311 passes through the clamping hole 32 through the clamping head 312.

[0090] It can be understood that the clamping structure includes two clamping parts 311, which are clamped into the clamping hole 32 through the two clamping parts 311. When the clamping head 312 completely passes through the clamping hole 32, it will be clamped in the clamping hole 32 to form a stable connection. When the protective net 14 needs to be disassembled, pinch the two clamping joints to make the clamping head 312 of the clamping part 311 fall out of the clamping hole 32, and disassembly is also relatively simple.

[0091] And, as a preferred embodiment, Figure 9 As shown, a hub shield 133 is provided inside the hub 132 of the fan blade 13 of this embodiment. The inner peripheral wall of the hub shield 133 is in a frustum shape, and the end with a larger diameter of the inner peripheral wall is connected to the open end of the hub 132 .

[0092] Therefore, the inner circumferential wall of the hub guard 133 is set to be a truncated cone shape. After it is installed on the fan blade 13, the end with the larger diameter of the inner circumferential wall is located at the end with an opening of the hub 132. During the rotation of the fan blade 13, the dirt, dust and other debris entering the hub 132 will be ejected from the open end of the hub 132 along with the truncated cone-shaped inclined surface of the hub guard 133 under the action of centrifugal force. No manual cleaning is required, which saves time and effort, can better prevent the fan blade 13 from shaking during operation, extend the service life of the fan blade 13, and strengthen the structural strength of the hub 132. It is applied to the engine cooling system of the vehicle to improve driving comfort.

[0093] It should be noted that the end of the inner circumferential wall with the larger diameter is located at the end of the hub 132 with the opening because the hub 132 of the fan blade 13 is generally provided with a hub panel 1321. The hub panel 1321 is generally located at one end of the hub 132, while the other end of the hub 132 is open. In other words, the hub 132 generally has only one opening. During the rotation of the fan blade 13, external debris such as sand and stones generally enter the space surrounded by the hub 132 and the hub panel 1321 through the opening. Therefore, the shape and arrangement of the inner circumferential wall are determined to facilitate the automatic discharge of debris that enters the hub 132 through the opening when the fan blade 13 rotates.

[0094] At the same time, refer to Figure 12 As shown in the figure, a groove 134 is provided between the hub 132 and the hub guard 133. Considering that the hub 132 and the hub guard 133 of the fan blade 13 are integrally injection-molded, when sand enters the groove 134 at any time, it cannot be excluded from the groove 134 under the action of centrifugal force because it is on the reverse side of the truncated cone, thereby easily affecting the balance of the fan blade 13 and causing a series of failures. In addition, in other scenes such as muddy ground, the groove 134 is also prone to accumulation of mud and sand, thereby affecting the balance of the fan blade 13.

[0095] Therefore, the opening of groove 134 faces away from the open end of hub 132, and a plug 135 is provided at the opening. Here, the end with the larger diameter of the inner peripheral wall is connected to the open end of hub 132. Groove 134 is provided between hub 132 and hub shield 133. The opening of groove 134 faces away from the open end of hub 132, and a plug 135 is provided at the opening. This prevents debris from entering groove 134 and facilitates the smooth and automatic discharge of debris.

[0096] In addition, as a preferred embodiment, Figure 10 As shown, in this embodiment, the angle between the generatrix c of the inner peripheral wall and the axis d of the inner peripheral wall is between 30° and 35°. This effectively facilitates the automatic discharge of debris during the operation of the fan blade 13, while occupying less space. Specifically, the angle between the generatrix c of the inner peripheral wall and the axis d of the inner peripheral wall can be 31°, 32°, 33°, 34°, or 35°.

[0097] At the same time, in this embodiment, as a preferred implementation form, refer to Figure 10 and Figure 11 As shown in the figure, a plurality of heat-conducting ribs 1331 and a plurality of reinforcing ribs 1332 are provided on the inner circumferential wall. The plurality of reinforcing ribs 1332 and the plurality of heat-conducting ribs 1331 are alternately arranged in the circumferential direction of the inner circumferential wall, and the heat-conducting ribs 1331 extend from the end with a smaller diameter of the inner circumferential wall to the end with a larger diameter of the inner circumferential wall, and are inclined in the opposite direction to the rotation direction of the hub guard 133.

[0098] Here, the heat-conducting ribs 1331 and the reinforcing ribs 1332 are arranged alternately, which is beneficial to improving the structural strength of the hub guard 133 and ensuring the smooth rotation of the fan blades 13. The multiple heat-conducting ribs 1331 can also achieve a better heat dissipation effect. At the same time, the heat-conducting ribs 1331 are set at an angle to facilitate the automatic removal of debris.

[0099] In a specific implementation, the thermal rib 1331 can be preferably configured in a triangular shape. Along the axial direction of the hub shield 133, the central portion of the thermal rib 1331 protrudes inwardly in the radial direction of the hub shield 133 to a greater extent, thereby achieving a better heat dissipation effect and helping to strengthen the structural strength of the hub shield 133. It is understood that the thermal rib 1331 can also be configured in other shapes, such as a square or a semicircle.

[0100] The extension direction of the reinforcing rib 1332 is consistent with the extension direction of the busbar c of the hub shield 133. It protrudes evenly from the inner wall to the center of the shield, similar to a ridge, which can better strengthen the structural strength of the hub shield 133 and prevent debris from staying in the hub 132, which is conducive to the smooth and automatic discharge of debris.

[0101] At the same time, two reinforcing ribs 1332 are provided between each pair of adjacent thermal ribs 1331 to balance structural strength and the automatic removal of debris. Furthermore, the provision of thermal ribs 1331 and reinforcing ribs 1332 also helps reduce the accumulation of sand and gravel, effectively reducing fan imbalance and avoiding a series of failures caused by fan imbalance. It should be understood that the number of reinforcing ribs 1332 between each pair of adjacent thermal ribs 1331 can also be set to other numbers, such as one.

[0102] In the specific structure, the number of thermal ribs 1331 is between 4 and 8, such as 4, 5, 6, 7 or 8. Therefore, by limiting the number of thermal ribs 1331, it helps to reduce the retention of debris such as sand and gravel while meeting the heat dissipation performance of the motor, and can effectively reduce the imbalance of the rotation of the fan blades 13, thereby helping to prevent a series of problems caused by the imbalance of the fan blades 13.

[0103] It is understandable that the number of thermal ribs 1331 is not limited to 4-8, and other values ​​are also feasible. For example, in an exemplary structure shown in the figure, the number of thermal ribs 1331 is 9, and the number of reinforcing ribs 1332 is 18.

[0104] Furthermore, the inclination angle of the heat conducting ribs 1331 is greater than or equal to 3°. By limiting the inclination angle of the heat conducting ribs 1331, it is further facilitated to discharge debris during the rotation of the hub guard 133, and it also facilitates the injection molding process of the fan blades 13. In a specific structure, the inclination angle of the heat conducting ribs 1331 is preferably set to 4°. Of course, in addition to 4°, it can also be set to 3°, 5°, or 6° according to actual needs, as long as it ensures the feasibility of injection molding of the fan blades 13.

[0105] In addition, in this embodiment, as a preferred implementation form, the hub guard 133 is annular and is integrally formed with the fan blade 13. At the same time, the blocking cover 135 is integrated with the hub panel 1321 of the fan blade 13 into an integrated structure. Here, the hub guard 133 is annular and is integrally formed with the fan blade 13, which is convenient to manufacture and has low processing costs. The blocking cover 135 is integrated with the hub panel 1321 of the fan blade 13 into an integrated structure, which has low processing costs and is relatively easy to install.

[0106] In practice, the hub 132 and hub guard 133 of the fan blade 13 are integrally injection-molded. When sand and gravel enter the high-speed rotating hub 132, centrifugal force forces the sand and gravel out of the hub 132 along the truncated cone-shaped slope of the hub guard 133. Furthermore, without compromising structural strength, the hub panel 1321 is provided with a plurality of heat dissipation holes 1322 to enhance heat dissipation and thereby facilitate heat dissipation from the motor.

[0107] The fan of this embodiment, by providing the protective net 14 in the first embodiment, can block granular objects such as sand and gravel, while reducing the obstruction of the protective blades 141 to the airflow, thereby achieving the purpose of taking both protective performance and ventilation performance into consideration.

[0108] In addition, this embodiment also relates to a vehicle, wherein the engine cooling system of the vehicle includes an engine radiator 2 and the fan as described above, which is provided on one side of the engine radiator 2 .

[0109] The vehicle of this embodiment adopts the above-mentioned fan to prevent abnormal vibration of the vehicle caused by debris entering the fan blades 13, and to prevent problems such as coolant leakage caused by shaking, thereby improving the comfort and safety of the vehicle.

[0110] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A protective net, characterized by: A fan bracket (11) for mounting on a fan, wherein the fan is mounted on one side of an engine radiator (2); The protective net (14) is provided with a plurality of groups of protective blades (141), each group of protective blades (141) includes a plurality of protective blades (141), and the plurality of protective blades (141) in each group are arranged at circumferential intervals along the annular region (142); The plurality of groups of protective blades (141) are sequentially arranged along the radial direction of the annular region (142), and the arrangement density of the protective blades (141) in the plurality of groups of protective blades (141) decreases sequentially from the edge to the center of the annular region (142).

2. The protective net according to claim 1, characterized in that: The arrangement of the protective blades (141) must satisfy the formula β>α; Wherein, β is the angle formed by the line connecting the inner edge a and the outer edge b of adjacent protective blades (141) and the end face of the engine radiator (2), and α is the angle formed by the gravel path and the end face of the engine radiator (2).

3. A fan, characterized in that: It comprises a fan bracket (11), a fan blade driving member (12), a fan blade (13) and a protective net (14) as claimed in claim 1 or 2; The fan is mounted on one side of the engine radiator (2) via the fan bracket (11), and the protective net (14) is provided on the side of the fan bracket (11) facing the engine radiator (2); The fan blade driving component (12) is installed on the fan bracket (11), and the power output end of the fan blade driving component (12) is connected to the fan blade (13).

4. The fan according to claim 3, wherein: The protective net (14) is mounted on the fan bracket (11) via a plurality of snap-fit ​​structures, and the plurality of snap-fit ​​structures are arranged at intervals around the circumference of the protective net (14).

5. The fan according to claim 4, characterized in that: Each of the clamping structures comprises a clamping portion (31) provided on the fan bracket (11) and a clamping hole (32) provided on the protective net (14); Each of the clamping parts (31) comprises two clamping members (311) arranged at intervals, and opposite sides of the two clamping members (311) are provided with a clamping head (312), and each of the clamping members (311) passes through the clamping hole (32) via the clamping head (312).

6. The fan according to claim 3, wherein: A hub guard (133) is provided inside the hub (132) of the fan blade (13), wherein the inner peripheral wall of the hub guard (133) is in a truncated cone shape, and an end with a larger diameter of the inner peripheral wall is connected to the open end of the hub (132); A groove (134) is provided between the wheel hub (132) and the wheel hub shield (133), the opening of the groove (134) faces away from the open end of the wheel hub (132), and a blocking cover (135) is provided at the opening.

7. The fan according to claim 6, characterized in that: The angle between the generatrix (c) of the inner peripheral wall and the axis (d) of the inner peripheral wall is between 30° and 35°.

8. The fan according to claim 6, wherein: The inner peripheral wall is provided with a plurality of heat-conducting ribs (1331) and a plurality of reinforcing ribs (1332), and the plurality of reinforcing ribs (1332) and the plurality of heat-conducting ribs (1331) are alternately arranged in the circumferential direction of the inner peripheral wall; The number of the heat-conducting ribs (1331) is between 4 and 8, and the inclination angle of the heat-conducting ribs (1331) is greater than or equal to 3°; The heat conducting rib (1331) 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 tilted in a direction opposite to the rotation direction of the hub shield (133).

9. The fan according to claim 6, wherein: The hub guard (133) is annular and is integrally formed with the fan blade (13); The blocking cover (135) and the hub panel (1321) of the fan blade (13) are integrated into an integral structure.

10. A vehicle, characterized in that: The vehicle engine cooling system comprises an engine radiator (2), and a fan according to any one of claims 3 to 9, which is arranged on one side of the engine radiator (2).

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