Fan

Abstract

The invention 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 Art

[0002] A fan is a device that uses an electric motor to drive the blades to rotate, thereby generating airflow. It is mainly used for air circulation, cooling, ventilation and heat dissipation. Fans are widely used in homes, offices, industrial sites and many other occasions.

[0003] In traditional fan designs, the transmission system usually adopts a hard connection method, that is, the output shaft of the motor is directly connected to the transmission shaft through a rigid connection (such as a gear, a coupling, etc.).

[0004] Although this hard connection method can effectively transmit power, when the motor starts, the motor speed increases rapidly from a static state to a high-speed rotation, causing a sudden impact between the connecting parts. When the motor stops, the motor speed decreases rapidly from a high-speed rotation to a static state, which also causes a sudden impact between the connecting parts. These sudden impact forces can cause collisions between rigid connecting parts, producing abnormal noises. Summary of the invention

[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 housing, fan blades and a transmission shaft, the fan blades being located in the mesh housing, the transmission shaft having a first end and a second end opposite to each other, the first end passing through the mesh housing and connected to the fan blades;

[0008] The machine head comprises a machine head shell, a motor and a clutch, wherein the motor and the clutch are installed in the machine head shell, the motor has an output shaft, and the output shaft is connected to the clutch, and the clutch is made of soft material; the mesh cover shell is detachably connected to the machine head shell, and when the mesh cover shell is connected to the machine head shell, the clutch is coupled to the second end.

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

[0010] In some embodiments, the clutch includes a connecting end and a coupling end connected to each other, the connecting end is provided with a mounting hole, the mounting hole extends along the axial direction of the clutch, the clutch is also provided with a metal connecting piece, the metal connecting piece is 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, the inner surface of the connecting end is provided with a first anti-slip structure, and the outer surface of the metal connecting piece is provided with a second anti-slip structure, and the second anti-slip structure is fixedly matched with the first anti-slip structure.

[0012] In some embodiments, the first anti-slip structure includes a plurality of first anti-slip convex strips, the plurality of first anti-slip convex strips are sequentially arranged along the circumference of the output shaft, and each of the first anti-slip convex strips extends along the axial direction of the output shaft;

[0013] The second anti-slip structure comprises a plurality of second anti-slip convex strips, the plurality of second anti-slip convex strips are sequentially arranged along the circumference of the output shaft, and each of the second anti-slip convex strips extends along the axial direction of the output shaft;

[0014] Each of the second anti-skid convex strips abuts between two adjacent first anti-skid convex strips.

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

[0016] In some embodiments, the second end is provided with a connecting pin, and the connecting pin is penetrated at the second end along the radial direction of the transmission shaft. The coupling end includes a plurality of coupling teeth, and the plurality of coupling teeth are connected to the connecting end. The plurality of coupling teeth are arranged in sequence along the circumference of the output shaft, and a coupling groove is formed between two adjacent coupling teeth. The coupling groove has an opening, and the opening is used for the connecting pin to be inserted into the coupling groove; when the mesh cover shell is connected to the head shell, the connecting pin is embedded in at least one of the coupling grooves.

[0017] In some embodiments, the coupling teeth are provided with guide slopes on opposite sides along the circumference of the clutch, and the guide slopes are used to guide the connecting pin into at least one of the coupling grooves.

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

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

[0020] The fan provided in the embodiment of the present application is installed in the head housing through a clutch made of soft material, and coupled with the second end of the transmission shaft, so that the clutch serves as a transmission connection 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, thereby driving 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, and thus reduce the noise generated by the entire fan, thereby improving the existing transmission system using a hard connection method, resulting in collisions between rigid connectors and the generation of impact noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated into and constitute a part of the specification, are embodiments consistent with the present application, and together with the description, are used to explain the principles of the present application.

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0024] Figure 1 A schematic diagram of the assembly of a fan provided in an embodiment of the present application.

[0025] Figure 2 A partial cross-sectional schematic diagram of a fan provided in an embodiment of the present application.

[0026] Figure 3 A schematic diagram of a partially exploded structure of an embodiment of a fan head provided in an embodiment of the present application.

[0027] Figure 4 A schematic diagram of the partial assembly structure of the nose provided in an embodiment of the present application.

[0028] Figure 5 for Figure 4 Schematic diagram of the decomposition structure.

[0029] Figure 6 A schematic diagram of the partial assembly of a machine head provided in an embodiment of the present application.

[0030] Figure 7 A schematic structural diagram of one direction of a clutch provided in an embodiment of the present application.

[0031] Figure 8 This is a schematic diagram of the structure of the clutch in another direction provided in an embodiment of the present application.

[0032] Fig. 9 Another cross-sectional schematic diagram of a clutch provided in an embodiment of the present application.

[0033] Fig.10 A schematic diagram of the structure of a metal connector provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] Fan 1, fan head 10, mesh housing 110, fan blades 120, transmission shaft 130, first end 131, second end 132, connecting pin 1321, head 20, head housing 210, mounting slot 211, motor 220, output shaft 221, clutch 230, connecting end 231, mounting hole 2311, first anti-slip structure 2312, first anti-slip ridge 2301, coupling end 232, coupling teeth 2321, coupling slot 233, first coupling slot 2331, second coupling slot 2332, third clutch slot 2333, fourth clutch slot 2334, opening 234, guide slope 235, metal connector 240, second anti-slip structure 2411, second anti-slip ridge 2401. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0038] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

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

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

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

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

[0043] Therefore, in order to solve the problem that the transmission system usually adopts a hard connection method, which causes collisions between rigid connectors and produces abnormal impact noise, the present application provides a fan that can reduce rigid collisions and thus reduce the noise generated by the entire fan. Please refer to the following embodiments for details.

[0044] See also Figures 1 to 10 An embodiment of the present application provides a fan 1 , which includes a fan head 10 and a machine head 20 .

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

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

[0047] The mesh cover shell 110 can be detachably connected to the head shell 210 by means of threaded connection, snap connection, magnetic connection, or latch connection.

[0048] The fan 1 provided in this embodiment is installed in the head housing 210 through a 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 connection 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, thereby driving the fan blades 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, and thus reduce the noise generated by the entire fan 1, thereby improving the problem that the existing transmission system adopts a hard connection method, resulting in collisions between rigid connectors and abnormal impact noise.

[0049] Furthermore, since the clutch 230 is made of soft material, it not only has a shock-absorbing effect, but also can reduce the friction and wear between the clutch 230 and the transmission shaft 130 and the output shaft 221, thereby extending the service life of components such as the transmission shaft 130 and the output shaft 221.

[0050] In addition, after the entire fan head 10 is removed, since the motor 220 may still be rotating, a clutch 230 made of soft material is installed on the outer periphery of the output shaft 221 of the motor 220. Even if the user accidentally touches the clutch 230, the soft material can effectively avoid causing harm to the user.

[0051] In addition, since rigid connectors require that the two rotating parts must be strictly aligned during installation, otherwise it will cause vibration, wear and even damage. Therefore, rigid connectors have high requirements for assembly accuracy and do not allow large assembly deviations.

[0052] The clutch 230 of the present application is made of soft material and has high flexibility and compensation ability, that is, the clutch 230 itself has a large allowable assembly deviation. Therefore, when the two rotating components, the output shaft and the transmission shaft, are connected for transmission through the clutch 230, even if there is a large relative 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 by deformation within a certain range, thereby ensuring the integrity of the transmission.

[0053] In some implementations, the clutch 230 is a silicone clutch 230 or a rubber clutch 230 .

[0054] Since silicone and rubber materials have good buffering properties, they can absorb part of the impact energy when the motor 220 starts and stops, reduce rigid collisions, and thus reduce abnormal noise due to impacts, thereby improving the user experience.

[0055] In addition, silicone and rubber materials have good weather resistance, can maintain stable performance under different temperature and humidity conditions, and are suitable for various environments. These materials 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 to each other, the connecting end 231 is provided with a mounting hole 2311, the mounting hole 2311 extends along the axial direction of the clutch 230, the clutch 230 is also provided with a metal connecting piece 240, the metal connecting piece 240 is embedded in the mounting hole 2311, and the output shaft 221 is connected to the metal connecting piece 240; when the mesh cover shell 110 is connected to the head shell 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 introduction of the metal connector 240 can 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 soft materials are easily deformed, the metal connector 240 can provide precise positioning points to prevent the clutch 230 from deforming during installation, thereby making it easier to align the clutch 230 with the output shaft 221 of the motor 220 during installation, reducing the alignment and adjustment time, thereby 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 , and 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 connector 240 is embedded inside the connecting end 231 of the clutch 230, a first anti-slip structure 2312 is provided on the inner surface of the connecting end 231 and a second anti-slip structure 2411 is provided on the outer surface of the metal connector 240. Thus, the fixed cooperation between the first anti-slip structure 2312 and the second anti-slip structure 2411 can effectively prevent the metal connector 240 from sliding inside the clutch 230, thereby ensuring a 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 ridges 2301, the plurality of first anti-slip ridges 2301 are sequentially arranged along the circumference of the output shaft 221, and each of the first anti-slip ridges 2301 extends along the axial direction of the output shaft 221;

[0062] The second anti-slip structure 2411 includes a plurality of second anti-slip convex strips 2401, which are sequentially arranged along the circumference of the output shaft 221, and each of the second anti-slip convex strips 2401 extends along the axial direction of the output shaft 221;

[0063] Each of the second anti-slip convex strips 2401 abuts against two adjacent first anti-slip convex strips 2301 .

[0064] The friction force of the inner surface of the connecting end 231 can be increased by providing a plurality of first anti-skid ridges 2301 . Similarly, the friction force of the outer surface of the metal connecting piece 240 can be increased by providing a second anti-skid structure 2411 including a plurality of second anti-skid ridges 2401 .

[0065] In addition, each second anti-slip ridge 2401 is abutted between two adjacent first anti-slip ridges 2301 to form a tight fixed fit, ensuring a tight fit between the metal connector 240 and the inner surface of the clutch 230, preventing the metal connector 240 from sliding inside the clutch 230, and thereby 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 may also be friction surfaces. For example, the outer surface of the metal connector 240 and the inner surface of the connecting end 231 may be specially treated by sandblasting, scoring, chemical corrosion, etc. to form a rough friction surface, increase the roughness of the outer surface of the metal connector 240 and the inner surface of the connecting end 231, and thus effectively prevent the metal connector 240 from sliding in the clutch 230, ensuring a stable connection between the clutch 230 and the output shaft 221 of the motor 220.

[0067] In some embodiments, the first anti-slip structure 2312 and the second anti-slip structure 2411 may also be in other shapes or partially perforated and rubber-coated. For example, holes may be opened on the metal connector 240 and rubber-coated.

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

[0069] The inner surface of the metal connector 240 may be provided with an internal thread, and the end of the output shaft 221 of the motor 220 may be provided with an external thread. Alternatively, the inner surface of the metal connector 240 may be provided with an external thread, and the end of the output shaft 221 of the motor 220 may be provided with an internal thread.

[0070] In this way, the metal connector 240 is threadedly connected to the output shaft 221, so that when vibration is generated during the operation of the motor 220, the stability of the connection between the metal connector 240 and the output shaft 221 of the motor 220 can be maintained to avoid loosening or falling off due to vibration.

[0071] In addition, the threaded connection is easy to operate and can be installed and disassembled by simply tightening or loosening, making it convenient for users to perform maintenance and replacement.

[0072] In some embodiments, the second end 132 is provided with a connecting pin 1321, and the connecting pin 1321 is penetrated through the second end 132 along the radial direction of the transmission shaft 130, and the coupling end 232 includes a plurality of coupling teeth 2321, and the plurality of coupling teeth 2321 are all connected to the connecting end 231, and the plurality of coupling teeth 2321 are arranged in sequence along the circumference of the output shaft 221, and two adjacent coupling teeth 2321 are spaced apart to form a coupling groove 233, and the coupling groove 233 has an opening 234, and the opening 234 is used for the connecting pin 1321 to be placed in the coupling groove 233; when the mesh cover shell 110 is connected to the head shell 210, the connecting pin 1321 is embedded in at least one of the coupling grooves 233.

[0073] In this way, by setting a plurality of coupling teeth 2321 at the coupling end 232 of the clutch 230, two adjacent coupling teeth 2321 are spaced apart to form a coupling groove 233 with an opening 234. The connecting pin 1321 can be embedded in the coupling groove 233 by simply 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 circumference of the clutch 230 , and the guide slopes 235 are used to guide the connecting pin 1321 into at least one of the coupling grooves 233 .

[0075] The guide slope 235 may be V-shaped, that is, the clutch 230 may have a double V-shaped guide slope 235 , which may facilitate assembly with the latch pin 1321 of the transmission shaft 130 .

[0076] Since the traditional clutch 230 is prone to getting stuck during assembly, the present application provides guide bevels 235 on opposite sides of the clutch 230 in the circumferential direction. The guide bevels 235 can guide the connecting pin 1321 to smoothly enter the coupling groove 233 to prevent it from getting stuck during the assembly process. The design of the guide bevels 235 allows the connecting pin 1321 to automatically align and be placed in the coupling groove 233 when it touches the bevel of the clutch 230, thereby reducing the error of manual alignment and improving the convenience of assembling the connecting pin 1321.

[0077] In some embodiments, the plurality of coupling slots 233 include a first coupling slot 2331, a second coupling slot 2332, a third clutch slot 2333 and a fourth clutch slot 2334, the first coupling slot 2331, the second coupling slot 2332, the third clutch slot 2333 and the fourth clutch slot 2334 are arranged in sequence along the circumference of the clutch 230, the first clutch slot and the third coupling slot 233 are symmetrically arranged along the axis of the clutch 230; the second clutch slot and the fourth coupling slot 233 are symmetrically arranged along the axis of the clutch 230; when the mesh cover shell 110 is connected to the head shell 210, the connecting pin 1321 is embedded in the first clutch slot and the third coupling slot 233; or, the connecting pin 1321 is embedded in the second clutch slot and the fourth coupling slot 233.

[0078] In this way, embedding the connecting pin 1321 in two symmetrically arranged coupling grooves 233 (such as the first clutch groove and the third coupling groove 233; or the second clutch groove and the fourth coupling groove 233) can effectively prevent relative rotation between the transmission 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 shape and size of the mounting groove 211 match those of the clutch 230 to ensure that the clutch 230 can be smoothly placed in and fixed in the mounting groove 211 .

[0081] Thus, by providing the mounting groove 211 on the head housing 210 and placing the clutch 230 in the mounting groove 211, it is possible to effectively prevent external impurities such as dust and moisture from entering the metal connector 240 inside the clutch 230, thereby extending the service life of the metal connector 240. In addition, the mounting groove 211 allows the clutch 230 to be better integrated into the head housing 210, saving space and making the entire fan 1 more compact.

[0082] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0083] Although the terms first, second, third, etc. can be used in the text to describe multiple 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 only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0084] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A fan, characterized in that: include: A fan head, the fan head comprising a mesh housing, fan blades and a transmission shaft, the fan blades being located in the mesh housing, the transmission shaft having a first end and a second end opposite to each other, the first end passing through the mesh housing and connected to the fan blades; The machine head comprises a machine head shell, a motor and a clutch, wherein the motor and the clutch are installed in the machine head shell, the motor has an output shaft, and the output shaft is connected to the clutch, and the clutch is made of soft material; the mesh cover shell is detachably connected to the machine head shell, and when the mesh cover shell is connected to the machine head shell, 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 to each other. The connecting end is provided with a mounting hole, and the mounting hole extends along the axial direction of the clutch. The clutch is also provided with a metal connecting piece, and the metal connecting piece is embedded in the mounting hole. 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.

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 connecting piece is provided with a second anti-slip structure, and the second anti-slip structure is fixedly matched with the first anti-slip structure.

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

6. The fan according to claim 4, characterized in that: The metal connecting piece is threadedly connected to the output shaft.

7. The fan according to claim 3, characterized in that: The second end is provided with a connecting pin, and the connecting pin is penetrated at the second end along the radial direction of the transmission shaft. The coupling end includes a plurality of coupling teeth, and the plurality of coupling teeth are connected to the connecting end. The plurality of coupling teeth are arranged in sequence along the circumference of the output shaft, and a coupling groove is formed between two adjacent coupling teeth. The coupling groove has an opening, and the opening is used for the connecting pin to be placed in the coupling groove; when the mesh cover shell is connected to the head shell, 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 guiding inclined surfaces on opposite sides along the circumference of the clutch, and the guiding inclined surfaces 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 multiple coupling grooves include a first coupling groove, a second coupling groove, a third clutch groove and a fourth clutch groove. The first coupling groove, the second coupling groove, the third clutch groove and the fourth clutch groove are arranged in sequence along the circumference of the clutch. The first clutch groove and the third coupling groove are symmetrically arranged along the axis of the clutch; the second clutch groove and the fourth coupling groove are symmetrically arranged along the axis of the clutch; when the mesh cover shell is connected to the head shell, the connecting pin is embedded in the first clutch groove and the third coupling groove; or, the connecting pin is embedded in the second clutch 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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