Fan

Abstract

The utility model provides a fan which comprises a fan head, the fan head comprises a mesh enclosure shell, fan blades and a transmission shaft, the fan blades are located in the mesh enclosure shell, the transmission shaft is provided with a first end and a second end which are opposite to each other, and the first end penetrates through the mesh enclosure shell and is connected to the fan blades; the machine head comprises a machine head shell, a motor and a clutch, the motor and the clutch are installed in the machine head shell, the motor is provided with an output shaft, the output shaft is connected to the clutch, and the clutch is made of soft materials; the mesh enclosure shell is detachably connected to the machine head shell, and when the mesh enclosure shell is connected to the machine head shell, the clutch is coupled with the second end. According to the fan, the clutch made of the soft material is adopted, the problem of impact abnormal noise caused by transmission hard connection in traditional fan design can be solved, and the clutch made of the soft material has the damping effect and the effect of increasing allowable deviation of parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of household appliances, and in particular to a fan. BACKGROUND

[0002] A fan is a device that uses an electric motor to drive the rotation of an impeller, thereby producing an air flow. It is mainly used for air circulation, cooling, ventilation and heat dissipation, etc. Fans are widely used in homes, offices, industrial sites and other places.

[0003] In traditional fan designs, the transmission system usually adopts a hard connection method, i.e. the output shaft of the motor is directly connected to the transmission shaft through rigid connecting components such as gears, shaft couplings, etc.

[0004] Although this hard connection method can effectively transmit power, when the motor starts, the motor speed rapidly increases from a stationary state to a high-speed rotation, resulting in sudden impacts between the connecting components. When the motor stops, the motor speed rapidly decreases from a high-speed rotation to a stationary state, which also results in sudden impacts between the connecting components. These sudden impact forces can cause collisions between the rigid connecting components, resulting in impact noises. SUMMARY

[0005] The present application provides a fan to improve at least one of the above problems.

[0006] The present application provides a fan, comprising:

[0007] a fan head, the fan head comprising a mesh cover housing, a fan blade and a transmission shaft, the fan blade being located in the mesh cover housing, the transmission shaft having a first end and a second end opposite to each other, the first end being arranged in the mesh cover housing and connected to the fan blade;

[0008] a motor head, the motor head comprising a motor head housing, a motor and a clutch, the motor and the clutch being installed in the motor head housing, the motor having an output shaft, the output shaft being connected to the clutch, the clutch being made of soft material; the mesh cover housing is detachably connected to the motor head housing, when the mesh cover housing is connected to the motor head housing, the clutch is coupled with the second end.

[0009] In some embodiments, the clutch is a silica gel clutch or a rubber clutch.

[0010] In some embodiments, the clutch comprises a connecting end and a coupling end connected together, the connecting end is provided with a mounting hole extending along an axial direction of the clutch, the clutch is further provided with a metal connecting piece embedded in the mounting hole, and the output shaft is connected to the metal connecting piece; when the mesh cover shell is connected to the head shell, the coupling end is coupled with the second end.

[0011] In some embodiments, an inner surface of the connecting end is provided with a first anti-skid structure, and an outer surface of the metal connecting piece is provided with a second anti-skid structure, and the second anti-skid structure and the first anti-skid structure are fixedly matched.

[0012] In some embodiments, the first anti-skid structure comprises a plurality of first anti-skid protrusions arranged in sequence along a circumferential direction of the output shaft, and each first anti-skid protrusion extends along an axial direction of the output shaft.

[0013] The second anti-skid structure comprises a plurality of second anti-skid protrusions arranged in sequence along a circumferential direction of the output shaft, and each second anti-skid protrusion extends along an axial direction of the output shaft.

[0014] Each second anti-skid protrusion abuts between two adjacent first anti-skid protrusions.

[0015] In some embodiments, the metal connecting piece is threadedly connected to the output shaft.

[0016] In some embodiments, the second end is provided with a connecting pin penetrating the second end along a radial direction of the transmission shaft, the coupling end comprises a plurality of coupling teeth, each coupling tooth is connected to the connecting end, a plurality of coupling teeth are arranged in sequence and spaced apart along a circumferential direction of the output shaft, and adjacent coupling teeth are spaced apart to form a coupling groove, the coupling groove has an opening for placing the connecting pin into the coupling groove; when the mesh cover shell is connected to the head shell, the connecting pin is embedded in at least one coupling groove.

[0017] In some embodiments, the coupling teeth are provided with a guide slope on both sides along a circumferential direction of the clutch, and the guide slope is used to guide the connecting pin into at least one coupling groove.

[0018] In some embodiments, the plurality of coupling grooves comprises a first coupling groove, a second coupling groove, a third coupling groove and a fourth coupling groove, which are arranged in sequence along the circumference of the clutch, the first coupling groove and the third coupling groove are symmetrically arranged along the axis of the clutch, the second coupling groove and the fourth coupling groove are symmetrically arranged along the axis of the clutch, when the net cover shell is connected to the head shell, the connecting pin is embedded in the first coupling groove and the third coupling groove, or the connecting pin is embedded in the second coupling groove and the fourth coupling groove.

[0019] In some embodiments, the head shell is provided with a mounting groove, and the clutch is located in the mounting groove.

[0020] The fan provided by the embodiments of the present application is installed in the head shell by using a clutch made of soft material and coupled with the second end of the transmission shaft, so that the clutch serves as a transmission connecting piece between the transmission shaft and the output shaft, so that the output shaft of the motor transmits power to the transmission shaft through the clutch, and then drives the fan blades to rotate. Since the clutch made of soft material has good buffering performance, it can absorb part of the impact energy when the motor starts and stops, reduce rigid collision, thereby reducing the noise generated by the entire fan, and thereby improving the problem that the existing transmission system uses a hard connection mode, resulting in collision between rigid connecting pieces and impact noise. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated in the specification and constituting a part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor under the premise of these drawings.

[0023] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments, elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, the drawings do not constitute a proportional limitation.

[0024] Figure 1 The assembly schematic diagram of the fan provided by the embodiments of the present application.

[0025] Figure 2 The partial cross-sectional schematic diagram of the fan provided by the embodiments of the present application.

[0026] Figure 3 Partially exploded structural schematic diagram of a fan head provided for an embodiment of the present application.

[0027] Figure 4 Partially assembled structural schematic diagram of a fan head provided for an embodiment of the present application.

[0028] Figure 5 Partially assembled structural schematic diagram of a fan head provided for an embodiment of the present application. Figure 4 Partially exploded structural schematic diagram of a fan head provided for an embodiment of the present application.

[0029] Figure 6 Partially assembled structural schematic diagram of a fan head provided for an embodiment of the present application.

[0030] Figure 7 Structural schematic diagram of one direction of a clutch provided for an embodiment of the present application.

[0031] Figure 8 Structural schematic diagram of another direction of a clutch provided for an embodiment of the present application.

[0032] Figure 9 Another sectional structural schematic diagram of a clutch provided for an embodiment of the present application.

[0033] Figure 10 Structural schematic diagram of a metal connecting piece provided for an embodiment of the present application.

[0034] Explanation of reference signs:

[0035] Fan 1, fan head 10, mesh cover housing 110, fan blade 120, transmission shaft 130, first end 131, second end 132, connecting pin 1321, fan head 20, fan head housing 210, mounting groove 211, motor 220, output shaft 221, clutch 230, connecting end 231, mounting hole 2311, first anti-skid structure 2312, first anti-skid protrusion 2301, coupling end 232, coupling tooth 2321, coupling groove 233, first coupling groove 2331, second coupling groove 2332, third coupling groove 2333, fourth coupling groove 2334, opening 234, guide inclined surface 235, metal connecting piece 240, second anti-skid structure 2411, second anti-skid protrusion 2401. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0037] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For purposes of simplicity of the present disclosure, the following description will refer to specific examples of components and arrangements of components. It is understood, however, that these are only examples and are not intended to limit the present application in any way. Furthermore, the present application can be used in any number of different examples and contexts, and is not limited to the specific examples described herein.

[0038] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof shall relate to the application as oriented in the drawing figures. However, it is to be understood that the application can assume various alternative orientations and, accordingly, such terms are not to be taken as limitations of the present application, except where so expressly defined by the patentee. All such modifications and variations will be deemed to be within the scope of the present application.

[0039] A fan is a device that uses an electric motor to drive the rotation of blades, thereby generating an air flow. It is mainly used for air circulation, cooling, ventilation, and heat dissipation, etc. Fans are widely used in homes, offices, industrial sites, and other places.

[0040] A fan is a device that uses an electric motor to drive the rotation of blades, thereby generating an air flow. It is mainly used for air circulation, cooling, ventilation, and heat dissipation, etc. Fans are widely used in homes, offices, industrial sites, and other places.

[0041] In traditional fan designs, the transmission system usually adopts a hard connection method, i.e. the output shaft of the motor is directly connected to the transmission shaft through a rigid connecting piece (such as a gear, a shaft coupling, etc.).

[0042] Although this hard connection mode can effectively transmit power, when the motor starts, the motor speed increases rapidly from the static state to the high-speed rotating state, resulting in a sudden impact between the connecting parts. When the motor stops, the motor speed decreases rapidly from the high-speed rotating state to the static state, which also causes a sudden impact between the connecting parts. These sudden impact forces can cause collisions between rigid connecting parts, producing impact noises.

[0043] Therefore, in order to solve the problem that the hard connection mode of the transmission system causes collisions between rigid connecting parts and produces impact noises, the present application provides a fan that can reduce rigid collisions and thus reduce the noise produced by the entire fan. For details, please refer to the following embodiments.

[0044] Please refer to Figures 1 to 10 The embodiment of the present application provides a fan 1, which comprises a fan head 10 and a motor head 20.

[0045] The fan head 10 comprises a mesh cover shell 110, a fan blade 120 and a transmission shaft 130. The fan blade 120 is located in the mesh cover shell 110, and the transmission shaft 130 has a first end 131 and a second end 132 opposite to each other. The first end 131 penetrates the mesh cover shell 110 and is connected to the fan blade 120.

[0046] The motor head 20 comprises a motor head shell 210, a motor 220 and a clutch 230. The motor 220 and the clutch 230 are installed in the motor head shell 210. The motor 220 has an output shaft 221 connected to the clutch 230, and the clutch 230 is made of soft material. The mesh cover shell 110 is detachably connected to the motor head shell 210. When the mesh cover shell 110 is connected to the motor head shell 210, the clutch 230 is coupled with the second end 132.

[0047] The mesh cover shell 110 can be detachably connected to the motor head shell 210 by thread connection, buckle connection, magnetic attraction connection or bolt connection.

[0048] The fan 1 provided by the embodiment is installed in the head shell 210 by adopting the clutch 230 made of soft material, and is coupled with the second end 132 of the transmission shaft 130, so that the clutch 230 serves as a transmission connecting piece between the transmission shaft 130 and the output shaft 221, so that the output shaft 221 of the motor 220 transmits power to the transmission shaft 130 through the clutch 230, and then drives the fan blade 120 to rotate. Since the clutch 230 made of soft material has good buffering performance, it can absorb part of the impact energy when the motor 220 starts and stops, reduce rigid collision, thereby reducing the noise generated by the whole fan 1, and then improve the problem that the existing transmission system adopts a hard connection mode, causing collision between rigid connecting pieces and producing impact noise.

[0049] Moreover, since the clutch 230 is made of soft material, it not only has the effect of shock absorption, but also can reduce the friction and wear between the clutch 230 and the transmission shaft 130 and the output shaft 221, thereby prolonging the service life of the transmission shaft 130 and the output shaft 221 and the like.

[0050] In addition, when the whole fan head 10 is disassembled, since the motor 220 may still be rotating, the clutch 230 made of soft material is installed on the outer periphery of the output shaft 221 of the motor 220, so that even if the user accidentally touches the clutch 230, the soft material can effectively avoid causing harm to the user.

[0051] In addition, since the rigid connecting piece requires that the two rotating parts must be strictly aligned during installation, otherwise vibration, wear and even damage will be caused, therefore, the rigid connecting piece has high requirements on assembly precision and does not allow large assembly deviation.

[0052] The clutch 230 of the present application is made of soft material and has high flexibility and compensation capacity, that is, the clutch 230 itself has large allowable assembly deviation, so that when the output shaft and the transmission shaft are connected and transmitted through the clutch 230, even if there is large misalignment between the output shaft 221 and the transmission shaft 130, the clutch 230 can compensate for the axial, radial and angular misalignment between the output shaft 221 and the transmission shaft 130 within a certain range by deformation, to ensure the integrity of transmission.

[0053] In some embodiments, the clutch 230 is a silica gel clutch 230 or a rubber clutch 230.

[0054] Since the silica gel and rubber materials have good buffering performance, they can absorb part of the impact energy when the motor 220 starts and stops, reduce rigid collision, and then reduce impact noise and improve the user's experience.

[0055] In addition, silica gel and rubber materials have good weather resistance, can maintain stable performance under different temperature and humidity conditions, are suitable for various environments, and have a long service life and can withstand long-term use without aging or damage.

[0056] In some embodiments, the clutch 230 includes a connecting end 231 and a coupling end 232 connected together, the connecting end 231 is provided with a mounting hole 2311 extending along the axial direction of the clutch 230, the clutch 230 is further provided with a metal connecting piece 240 embedded in the mounting hole 2311, and the output shaft 221 is connected to the metal connecting piece 240; when the mesh cover housing 110 is connected to the head housing 210, the coupling end 232 is coupled with the second end 132.

[0057] Since the clutch 230 is made of soft material, the connection strength provided by the soft material alone is relatively weak, therefore, the metal connecting piece 240 is introduced to enhance the connection strength, thereby effectively supporting the connection of the clutch 230 and ensuring the stable connection between the clutch 230 and the output shaft 221 of the motor 220.

[0058] In addition, since the soft material is prone to deformation, the metal connecting piece 240 can provide an accurate positioning point, which can prevent the clutch 230 from deforming during installation, thereby making it easier for the clutch 230 to align with the output shaft 221 of the motor 220 during installation, reducing the time for alignment and adjustment, and thus improving the convenience of installing the clutch 230.

[0059] In some embodiments, the inner surface of the connecting end 231 is provided with a first anti-slip structure 2312, the outer surface of the metal connecting piece 240 is provided with a second anti-slip structure 2411, and the second anti-slip structure 2411 and the first anti-slip structure 2312 are fixedly matched.

[0060] Since the metal connecting piece 240 is embedded inside the connecting end 231 of the clutch 230, by providing the first anti-slip structure 2312 on the inner surface of the connecting end 231 and the second anti-slip structure 2411 on the outer surface of the metal connecting piece 240, the fixed matching of the first anti-slip structure 2312 and the second anti-slip structure 2411 can effectively prevent the metal connecting piece 240 from sliding inside the clutch 230, thereby ensuring the stable connection between the clutch 230 and the output shaft 221 of the motor 220.

[0061] In some embodiments, the first anti-slip structure 2312 includes a plurality of first anti-slip protrusions 2301 arranged in sequence along the circumferential direction of the output shaft 221, and each first anti-slip protrusion 2301 extends along the axial direction of the output shaft 221.

[0062] The second anti-skid structure 2411 comprises a plurality of second anti-skid ribs 2401 arranged along the circumference of the output shaft 221, and each second anti-skid rib 2401 extends along the axis of the output shaft 221.

[0063] Each second anti-skid rib 2401 abuts between two adjacent first anti-skid ribs 2301.

[0064] The plurality of first anti-skid ribs 2301 can increase the friction of the inner surface of the connecting end 231. Similarly, the second anti-skid structure 2411 comprising a plurality of second anti-skid ribs 2401 on the outer surface of the metal connecting piece 240 can also increase the friction of the outer surface of the metal connecting piece 240.

[0065] In addition, each second anti-skid rib 2401 abuts between two adjacent first anti-skid ribs 2301, forming a tight and fixed fit, ensuring the tight fit between the metal connecting piece 240 and the inner surface of the clutch 230, preventing the metal connecting piece 240 from sliding in the clutch 230, and further ensuring the stability and reliability of power transmission.

[0066] In some embodiments, the first anti-skid structure 2312 and the second anti-skid structure 2411 can also be friction surfaces. For example, the outer surface of the metal connecting piece 240 and the inner surface of the connecting end 231 can be specially treated by sandblasting, scoring, chemical etching, etc. to form rough friction surfaces, increasing the roughness of the outer surface of the metal connecting piece 240 and the inner surface of the connecting end 231, and further effectively preventing the metal connecting piece 240 from sliding in the clutch 230, ensuring the stable connection between the clutch 230 and the output shaft 221 of the motor 220.

[0067] In some embodiments, the first anti-skid structure 2312 and the second anti-skid structure 2411 can also be other shapes or locally perforated and glued, such as being designed in a way of perforating the metal connecting piece 240 to be glued.

[0068] In some embodiments, the metal connecting piece 240 is threadedly connected to the output shaft 221.

[0069] In some embodiments, the inner surface of the metal connecting piece 240 can be provided with internal threads, and the end of the output shaft 221 of the motor 220 can be provided with external threads. Alternatively, the inner surface of the metal connecting piece 240 can be provided with external threads, and the end of the output shaft 221 of the motor 220 can be provided with internal threads.

[0070] Thus, the metal connecting piece 240 is screwed to the output shaft 221, so that the stability of the connection between the metal connecting piece 240 and the output shaft 221 of the motor 220 can be maintained during the vibration of the motor 220, and loosening or falling caused by vibration can be avoided.

[0071] In addition, the threaded connection operation is simple, and only needs to be screwed or unscrewed to complete the installation and disassembly, which is convenient for users to maintain and replace.

[0072] In some embodiments, the second end 132 is provided with a connecting pin 1321 penetrating the second end 132 along the radial direction of the transmission shaft 130, the coupling end 232 includes a plurality of coupling teeth 2321, each of which is connected to the connecting end 231, and the plurality of coupling teeth 2321 are sequentially and spaced arranged along the circumferential direction of the output shaft 221, and the coupling groove 233 is formed between two adjacent coupling teeth 2321, the coupling groove 233 has an opening 234 for inserting the connecting pin 1321 into the coupling groove 233; when the mesh cover 110 is connected to the head cover 210, the connecting pin 1321 is embedded in at least one coupling groove 233.

[0073] Thus, by arranging a plurality of coupling teeth 2321 on the coupling end 232 of the clutch 230, a coupling groove 233 with an opening 234 is formed between two adjacent coupling teeth 2321, and the connecting pin 1321 can be embedded in the coupling groove 233 by aligning the connecting pin 1321 with the coupling groove 233 through the opening 234, thereby improving the convenience of the installation and disassembly process of the connecting pin 1321.

[0074] In some embodiments, the coupling teeth 2321 are provided with guide slopes 235 on opposite sides along the circumferential direction of the clutch 230, and the guide slopes 235 are used to guide the connecting pin 1321 into at least one coupling groove 233.

[0075] The guide slope 235 can be designed in a V shape, that is, the clutch 230 is provided with double V-shaped guide slopes 235, which can facilitate the assembly of the connecting pin 1321 of the transmission shaft 130.

[0076] Since the traditional clutch 230 is prone to jamming when assembled, the present application is provided with a guide slope 235 on both sides of the clutch 230 in the circumferential direction, which can guide the connecting pin 1321 to smoothly enter the coupling groove 233, preventing the occurrence of jamming during assembly, and the design of the guide slope 235 allows the connecting pin 1321 to be automatically aligned and placed in the coupling groove 233 when it touches the slope of the clutch 230, reducing the error of manual alignment and improving the convenience of assembling the connecting pin 1321.

[0077] In some embodiments, the plurality of coupling grooves 233 includes a first coupling groove 2331, a second coupling groove 2332, a third coupling groove 2333, and a fourth coupling groove 2334, which are arranged in sequence along the circumferential direction of the clutch 230, and the first and third coupling grooves 233 are symmetrically arranged along the axis of the clutch 230; the second and fourth coupling grooves 233 are symmetrically arranged along the axis of the clutch 230; when the mesh cover housing 110 is connected to the head housing 210, the connecting pin 1321 is embedded in the first and third coupling grooves 233; or the connecting pin 1321 is embedded in the second and fourth coupling grooves 233.

[0078] In this way, embedding the connecting pin 1321 in two symmetrically arranged coupling grooves 233 (such as the first and third coupling grooves 233; or the second and fourth coupling grooves 233) can effectively prevent relative rotation between the drive shaft 130 and the clutch 230.

[0079] In some embodiments, the head housing 210 is provided with a mounting groove 211, and the clutch 230 is located in the mounting groove 211.

[0080] The mounting groove 211 is shaped and sized to match the clutch 230 to ensure that the clutch 230 can be smoothly placed and fixed in the mounting groove 211.

[0081] In this way, by providing the mounting groove 211 on the head housing 210 and placing the clutch 230 in the mounting groove 211, it can effectively prevent external impurities such as dust and moisture from entering the metal connecting piece 240 inside the clutch 230, thereby prolonging the service life of the metal connecting piece 240. And the mounting groove 211 allows the clutch 230 to better integrate into the head housing 210, saving space and making the entire fan 1 structure more compact.

[0082] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0083] Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0084] The above summary of the present application is given for the purpose of understanding only and is not intended to be limiting. Various modifications to the embodiments described in this disclosure will be readily apparent to those with skill in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the disclosure is not intended to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the claims, the principles and the novel features disclosed herein.

Claims

1. A fan, characterized in that, include: A fan head, comprising a mesh cover housing, fan blades, and a drive shaft, wherein the fan blades are located inside the mesh cover housing, and the drive shaft has a first end and a second end facing away from each other, the first end passing through the mesh cover housing and connected to the fan blades; The machine head includes a machine head housing, a motor, and a clutch. The motor and the clutch are installed inside the machine head housing. The motor has an output shaft connected to the clutch. The clutch is made of a soft material. A mesh cover is detachably connected to the machine head housing. When the mesh cover is connected to the machine head housing, the clutch is coupled to the second end.

2. The fan according to claim 1, characterized in that, The clutch is a silicone clutch or a rubber clutch.

3. The fan according to claim 1, characterized in that, The clutch includes a connecting end and a coupling end connected together. The connecting end is provided with a mounting hole that extends along the axial direction of the clutch. The clutch is also provided with a metal connector that is embedded in the mounting hole. The output shaft is connected to the metal connector. When the mesh cover housing is connected to the head housing, the coupling end is coupled to the second end.

4. The fan according to claim 3, characterized in that, The inner surface of the connecting end is provided with a first anti-slip structure, and the outer surface of the metal connector is provided with a second anti-slip structure. The second anti-slip structure and the first anti-slip structure are fixedly fitted together.

5. The fan according to claim 4, characterized in that, The first anti-slip structure includes a plurality of first anti-slip protrusions, which are arranged sequentially along the circumference of the output shaft, and each first anti-slip protrusion extends along the axial direction of the output shaft; The second anti-slip structure includes a plurality of second anti-slip protrusions, which are arranged sequentially along the circumference of the output shaft, and each second anti-slip protrusion extends along the axial direction of the output shaft; Each of the second anti-slip ridges abuts between two adjacent first anti-slip ridges.

6. The fan according to claim 4, characterized in that, The metal connector is threaded onto the output shaft.

7. The fan according to claim 3, characterized in that, The second end is provided with a connecting pin, which passes through the second end radially along the drive shaft. The coupling end includes a plurality of coupling teeth, which are all connected to the connecting end. The plurality of coupling teeth are arranged sequentially at intervals along the circumference of the output shaft. Adjacent coupling teeth form a coupling groove at intervals. The coupling groove has an opening for the connecting pin to be inserted into the coupling groove. When the mesh cover housing is connected to the head housing, the connecting pin is embedded in at least one of the coupling grooves.

8. The fan according to claim 7, characterized in that, The coupling teeth are provided with guide slopes on opposite sides of the clutch along the circumference, and the guide slopes are used to guide the connecting pin into at least one of the coupling grooves.

9. The fan according to claim 7, characterized in that, The plurality of coupling grooves include a first coupling groove, a second coupling groove, a third coupling groove, and a fourth coupling groove. The first coupling groove, the second coupling groove, the third coupling groove, and the fourth coupling groove are arranged sequentially along the circumference of the clutch. The first coupling groove and the third coupling groove are symmetrically arranged along the axis of the clutch. The second coupling groove and the fourth coupling groove are symmetrically arranged along the axis of the clutch. When the mesh cover housing is connected to the head housing, the connecting pin is embedded in the first coupling groove and the third coupling groove; or, the connecting pin is embedded in the second coupling groove and the fourth coupling groove.

10. The fan according to claim 1, characterized in that, The head housing is provided with a mounting groove, and the clutch is located in the mounting groove.

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