Fan

Abstract

The utility model provides a fan which comprises a fan head, the fan head comprises a mesh enclosure shell and fan blades, the fan blades are installed in the mesh enclosure shell, and an installation space is formed in the side, away from the fan blades, of the mesh enclosure shell; the machine head is connected to the fan head and comprises a motor, and the motor is provided with an output shaft; the transmission module comprises a transmission body, a transmission shaft and a damping sleeve, the damping sleeve and the transmission body are located in the installation space, the transmission shaft rotatably penetrates through the transmission body, one end of the transmission shaft penetrates through the fan blades, and the other end of the transmission shaft is connected to the output shaft; the damping sleeve wraps the outer surface of the transmission body and abuts against the portion between the transmission body and the mesh enclosure shell. The vibration can be effectively absorbed and buffered, the vibration amplitude is reduced, the vibration is prevented from being transmitted to the mesh enclosure shell and other movable parts of the fan, then the phenomenon that the fan head and the other movable parts of the fan shake due to the influence of the vibration is reduced, and therefore noise generated in the operation process of the fan is reduced.

Description

TECHNICAL FIELD

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

[0002] A fan is a device that uses an electric motor to drive the rotation of blades, 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 other places.

[0003] During the use of the fan, due to the large fan blades, the rotation is not balanced. This imbalance will cause slight vibration and transmit the vibration to the entire fan, making the moving parts (left and right head, up and down head, connecting support rod, etc.) and the entire head of the fan prone to shaking and shaking phenomenon, thereby causing abnormal noise during the operation of the fan. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a fan to improve at least one of the above problems.

[0005] The present application provides a fan, comprising:

[0006] A fan head comprising a mesh cover housing and fan blades, the fan blades being installed in the mesh cover housing, and the mesh cover housing being provided with a mounting space on the side away from the fan blades;

[0007] A machine head connected to the fan head, the machine head comprising a motor, the motor having an output shaft; and

[0008] A transmission module comprising a transmission body, a transmission shaft, and a damping sleeve, the damping sleeve and the transmission body being located in the mounting space, the transmission shaft being rotatably provided in the transmission body, one end of the transmission shaft being provided in the fan blades, and the other end of the transmission shaft being connected to the output shaft; the damping sleeve being wrapped around the outer surface of the transmission body, and the damping sleeve being in abutment between the transmission body and the mesh cover housing.

[0009] In some embodiments, the damping sleeve comprises a first damping portion, which is arranged around the circumference of the transmission body and abuts the transmission body and the mesh cover housing in the radial direction of the transmission shaft.

[0010] In some embodiments, the fan head further comprises a pressing cover for limiting the transmission body in the mounting space, the other end of the transmission shaft being provided in the pressing cover and connected to the output shaft.

[0011] The damping sleeve comprises a second damping part and a third damping part, the second damping part and the third damping part are arranged in sequence along the axial direction of the transmission shaft, the first damping part is connected between the second damping part and the third damping part, the second damping part abuts between the mesh cover and the transmission main body along the axial direction of the transmission shaft, and the third damping part abuts between the transmission main body and the pressing cover along the axial direction of the transmission shaft.

[0012] In some embodiments, the outer periphery of the first damping part is provided with a plurality of first anti-skid protrusions, and the plurality of first anti-skid protrusions are arranged in sequence along the circumferential direction of the first damping part, and each first anti-skid protrusion extends along the axial direction of the transmission shaft.

[0013] In some embodiments, the damping sleeve is a silica gel damping sleeve or a rubber damping sleeve.

[0014] In some embodiments, the transmission main body comprises a bearing and a transmission housing, the bearing is located in the transmission housing, the inner ring of the bearing is fixedly connected to the transmission shaft, the outer ring of the bearing is fixedly connected to the transmission housing, the inner ring of the bearing can rotate relative to the outer ring of the bearing, and the damping sleeve is wrapped on the outer surface of the transmission housing.

[0015] In some embodiments, the transmission housing comprises a first sub-housing and a second sub-housing, the second sub-housing and the first sub-housing jointly form a containing space, the bearing is located in the containing space, the damping sleeve is wrapped on the outer surface of the first sub-housing and the outer surface of the second sub-housing, and the second sub-housing is detachably connected to the first sub-housing.

[0016] In some embodiments, the outer periphery of the first sub-housing is provided with a plurality of second anti-skid protrusions, and the plurality of second anti-skid protrusions are arranged in sequence along the circumferential direction of the first sub-housing, and each second anti-skid protrusion extends along the axial direction of the transmission shaft.

[0017] In some embodiments, the outer periphery of the first sub-housing is provided with a first buckle structure, the outer periphery of the second sub-housing is provided with a second buckle structure, and the second buckle structure can be matched with the first buckle structure.

[0018] In some embodiments, the transmission shaft is arranged through the first sub-housing and the second sub-housing, the transmission main body further comprises a first sealing ring and a second sealing ring, the first sealing ring surrounds the transmission and abuts at the connection between the first sub-housing and the transmission shaft, and the second sealing ring surrounds the transmission and abuts at the connection between the second sub-housing and the transmission shaft.

[0019] The fan provided by the embodiment of the application increases the damping sleeve wrapped around the outer surface of the transmission main body in the transmission module, and the damping sleeve is in abutment between the transmission main body and the mesh cover shell and directly contacts the transmission main body and the mesh cover shell. Thus, when the fan blade vibrates due to imbalance and transmits the vibration to the transmission main body, the damping sleeve on the outer surface of the transmission main body can effectively absorb and buffer the vibration, reduce the vibration amplitude, prevent the vibration from being transmitted to the mesh cover shell and other moving parts of the fan, and further reduce the phenomenon that the fan head and other moving parts of the fan are affected by the vibration to cause shaking, thereby reducing the noise generated by the fan during operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application together with the specification.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, for those skilled in the field, other drawings can also be obtained based on these drawings without any creative labor.

[0022] One or more embodiments are exemplarily illustrated by pictures in the drawings corresponding to the embodiments, and the exemplarily 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.

[0023] Figure 1 The assembly schematic diagram of the fan provided by the embodiment of the application is shown.

[0024] Figure 2 The cross-sectional schematic diagram of the fan provided by the embodiment of the application is shown.

[0025] Figure 3 The partial structure schematic diagram of the fan head provided by the embodiment of the application is shown.

[0026] Figure 4 The assembly structure schematic diagram of one embodiment of the transmission module provided by the embodiment of the application is shown.

[0027] Figure 5 The assembly structure schematic diagram of another embodiment of the transmission module provided by the embodiment of the application is shown.

[0028] Figure 6 The cross-sectional schematic diagram of the transmission module provided by the embodiment of the application is shown. Figure 4

[0029] Figure 7 The exploded structure schematic diagram of the transmission module provided by the embodiment of the application is shown.​

[0030] Figure 8 A structure diagram of a first sub-shell provided for an embodiment of the present application.

[0031] Figure 9 A structure diagram of a second sub-shell provided for an embodiment of the present application.

[0032] Figure 10 A structure diagram of a damping sleeve provided for an embodiment of the present application.

[0033] Explanation of reference numerals:

[0034] Fan 1, transmission module 10, transmission main body 100, transmission housing 110, first sub-shell 111, second anti-skid protrusion 1110, first buckle structure 1111, second sub-shell 112, second buckle structure 1121, bearing 120, containing space 130, first connecting hole 140, second connecting hole 150, transmission shaft 200, first sealing ring 310, second sealing ring 320, third sealing ring 330, damping sleeve 300, first damping part 310, first anti-skid protrusion 311, second damping part 320, third damping part 330, head 20, motor 21, output shaft 22, fan head 30, fan blade 31, mesh cover housing 32, mounting space 33, pressing cover 35. DETAILED DESCRIPTION

[0035] In order to make the purpose, 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 in combination with 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 those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0036] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, components 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, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed.

[0037] For the convenience of description, spatial relative terms can be used herein to describe the relative position relationship or movement condition of one element or feature relative to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", and the like. 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 drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both the upper and lower positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0038] A fan is a device that uses an electric motor to drive the rotation of blades, 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 other places.

[0039] During the use of the fan, due to the large fan blades, rotation imbalance can easily occur. This imbalance can cause slight vibration and transmit the vibration to the entire fan, making the moving parts (left and right head, up and down head, connecting support rod, etc.) and the entire head of the fan prone to shaking and shaking phenomenon, which in turn causes the fan to produce abnormal noise during operation.

[0040] Therefore, in order to solve the technical problem that the vibration caused by the imbalance of the fan blades causes the moving parts and the entire head of the fan to be prone to shaking and shaking phenomenon, which in turn causes the fan to produce abnormal noise during operation, the present application provides a fan that can reduce the vibration amplitude, prevent the vibration from being transmitted to the moving parts such as the transmission body, and in turn reduce the shaking and shaking phenomenon of the transmission body and the fan head caused by the vibration, thereby reducing the noise generated by the fan during operation. Please refer to the following embodiments.

[0041] Please refer to Figures 1 to 10 The present application provides a fan 1, which comprises a fan head 30, a motor head 20 and a transmission module 10.

[0042] The fan head 30 comprises a mesh cover housing 32 and a fan blade 31, the fan blade 31 is installed in the mesh cover housing 32, and the side of the mesh cover housing 32 away from the fan blade 31 is provided with a mounting space 33.

[0043] The machine head 20 is connected to the fan head 30, and the machine head 20 comprises a motor 21 having an output shaft 22.

[0044] The transmission module 10 comprises a transmission body 100, a transmission shaft 200, and a damping sleeve 300. The damping sleeve 300 and the transmission body 100 are located in the installation space 33, the transmission shaft 200 is rotatably arranged in the transmission body 100, one end of the transmission shaft 200 is arranged in the fan blade 31, and the other end of the transmission shaft 200 is connected to the output shaft 22. The damping sleeve 300 is wrapped on the outer surface of the transmission body 100, and the damping sleeve 300 abuts between the transmission body 100 and the mesh cover housing 32.

[0045] The fan provided in the embodiment directly contacts the transmission body and the mesh cover housing by adding the damping sleeve wrapped on the outer surface of the transmission body in the transmission module, and the damping sleeve abuts between the transmission body and the mesh cover housing. Thus, when the fan blade vibrates due to imbalance and transmits the vibration to the transmission body, the damping sleeve on the outer surface of the transmission body can effectively absorb and buffer the vibration, reduce the vibration amplitude, prevent the vibration from being transmitted to the mesh cover housing and other moving parts of the fan, thereby reducing the phenomenon that the fan head and other moving parts of the fan are affected by the vibration to shake, and reducing the noise generated by the fan in operation.

[0046] In some embodiments, the damping sleeve 300 comprises a first damping part 310, which is arranged in the circumferential direction of the transmission body 100 and abuts between the transmission body 100 and the mesh cover housing 32 in the radial direction of the transmission shaft 200.

[0047] Thus, the first damping part 310 is arranged in the circumferential direction of the transmission body 100, which can comprehensively cover the outer surface of the transmission body 100 and provide omnidirectional damping protection. Moreover, the first damping part 310 abuts between the transmission body 100 and the mesh cover housing 32 in the radial direction of the transmission shaft 200, which can effectively absorb and buffer the radial vibration when the fan blade vibrates due to imbalance and transmits the vibration to the transmission body, prevent the vibration from being transmitted to the mesh cover housing and other moving parts of the fan 1, thereby reducing unnecessary shaking of the fan 1 during operation, reducing noise generation, improving the stability of the fan 1 in operation, and improving the user experience.

[0048] In some embodiments, the fan head 30 further comprises a pressing cover 35 for limiting the transmission body 100 in the installation space 33, and the other end of the transmission shaft 200 is arranged in the pressing cover and connected to the output shaft 22.

[0049] The damping sleeve 300 comprises a second damping portion 320 and a third damping portion 330, which are arranged in sequence along the axial direction of the transmission shaft, and the first damping portion 310 is connected between the second damping portion 320 and the third damping portion 330. The second damping portion 320 abuts between the mesh cover housing 32 and the transmission main body 100 along the axial direction of the transmission shaft 200, and the third damping portion 330 abuts between the transmission main body 100 and the pressing cover along the axial direction of the transmission shaft 200.

[0050] In this way, the second damping portion 320 and the third damping portion 330 abut between the mesh cover housing 32 and the transmission main body 100 along the axial direction of the transmission shaft 200, and between the mesh cover housing 32 and the pressing cover 35, so that when the fan blade vibrates due to imbalance and transmits the vibration to the transmission main body, the axial damping effect can be provided to prevent the vibration from being transmitted to the mesh cover housing and other moving parts of the fan, improve the problem of vibration and abnormal noise generated during the operation of the fan 1, and improve the stability and quietness of the fan 1.

[0051] In addition, the pressing cover 35 is used to limit the transmission main body 100 in the mounting space 33, and the other end of the transmission shaft 200 penetrates the pressing cover 35 and is connected with the output shaft 22, so that when the transmission main body 100 is installed in the rear mesh, the connection between the transmission main body 100 and the rear mesh is further fixed by the pressing cover 35, and the stability of the connection between the transmission main body 100 and the rear mesh is improved.

[0052] In some embodiments, the outer periphery of the first damping portion 310 is provided with a plurality of first anti-skid protrusions 311, which are arranged in sequence along the circumferential direction of the first damping portion 310, and each first anti-skid protrusion 311 extends along the axial direction of the transmission shaft 200.

[0053] By providing a plurality of first anti-skid protrusions 311 on the outer periphery of the first damping portion 310, the friction of the outer periphery of the first damping portion 310 can be increased, and the phenomenon of slippage of the transmission main body 100 in the mounting space 33 can be avoided, thereby improving the stability of the assembly of the transmission main body 100.

[0054] In some embodiments, the damping sleeve 300 is a silica gel damping sleeve 300 or a rubber damping sleeve 300.

[0055] Since the silica gel and rubber materials have good buffering performance, part of the vibration generated by the fan blade 31 due to imbalance and transmitted to the transmission main body can be absorbed, the amplitude of the vibration is reduced, and the vibration is prevented from being transmitted to the mesh housing of the fan 1 and other moving parts of the fan, etc., thereby reducing the phenomenon of shaking and shaking of the mesh housing of the fan and other moving parts of the fan due to the influence of the vibration, thereby reducing the noise generated by the fan 1 during operation and improving the user experience.

[0056] In addition, the silica gel and rubber materials have good weather resistance and 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.

[0057] In some embodiments, the transmission main body 100 includes a bearing 120 and a transmission housing 110, the bearing 120 is located in the transmission housing 110, the inner ring of the bearing 120 is fixedly connected to the transmission shaft 200, the outer ring of the bearing 120 is fixedly connected to the transmission housing 110, the inner ring of the bearing 120 can rotate relative to the outer ring of the bearing 120, and the damping sleeve 300 is wrapped on the outer surface of the transmission housing 110.

[0058] In some embodiments, the transmission housing 110 includes a first sub-housing 111 and a second sub-housing 112, the second sub-housing 112 and the first sub-housing 111 jointly form a containing space 130, the bearing 120 is located in the containing space 130, the damping sleeve 300 is wrapped on the outer surface of the first sub-housing 111 and the outer surface of the second sub-housing 112, and the second sub-housing 112 is detachably connected to the first sub-housing 111.

[0059] Among them, the first sub-housing 111 can be detachably connected to the second sub-housing 112 through threaded connection, buckle connection, magnetic attraction connection, and bolt connection.

[0060] In this way, the detachable connection mode of the first sub-housing 111 and the second sub-housing 112 simplifies the assembly process and improves the assembly efficiency of the transmission module 10.

[0061] In addition, by sleeving the damping sleeve 300 on the outer surfaces of the first sub-housing 111 and the second sub-housing 112, part of the vibration generated by the fan blade 31 due to imbalance can be absorbed in time when the vibration is transmitted to the first sub-housing 111 and the second sub-housing 112, the amplitude of the vibration is reduced, the vibration is prevented from being transmitted from the first sub-housing 111 and the second sub-housing 112 to the mesh housing, such as the rear mesh of the fan, and the phenomenon of shaking of the mesh housing and other moving parts of the fan due to the influence of the vibration is reduced, thereby reducing the noise generated by the mesh housing and other moving parts of the fan, and improving the user experience.

[0062] In some embodiments, the outer periphery of the first sub-housing 111 is provided with a plurality of second anti-skid protrusions 1110, and the plurality of second anti-skid protrusions 1110 are arranged in sequence along the circumferential direction of the first sub-housing 111, and each second anti-skid protrusion 1110 extends along the axial direction of the transmission shaft 200.

[0063] Since the inside of the damping sleeve 300 is smooth, by providing a plurality of second anti-skid protrusions 1110 on the outer periphery of the first sub-housing 111, the roughness of the contact surface between the first sub-housing 111 and the inside of the damping sleeve 300 can be increased, and the phenomenon of slipping of the first sub-housing 111 inside the damping sleeve 300 is avoided, thereby improving the stability of the assembly of the transmission housing 110.

[0064] In some embodiments, the outer periphery of the first sub-housing 111 is provided with a first clasp structure 1111, the outer periphery of the second sub-housing 112 is provided with a second clasp structure 1121, and the second clasp structure 1121 can cooperate with the first clasp structure 1111.

[0065] Among them, the first clasp structure 1111 can be a clasp protrusion, and the second clasp structure 1121 can be a clasp groove, and the clasp can be embedded in the clasp groove.

[0066] In this way, the connection mode of the clasp is adopted, and only a simple pressing or rotating action is needed to complete the connection, without the need for complex tools or operation steps. Secondly, the clasp connection is more firm and less likely to loosen, ensuring the stability and reliability of the transmission module 10.

[0067] In some embodiments, the transmission shaft 200 is arranged through the first sub-housing 111 and the second sub-housing 112, and the transmission body 100 further comprises a first sealing ring 310 and a second sealing ring 320, the first sealing ring 310 surrounds the transmission and abuts against the connection between the first sub-housing 111 and the transmission shaft 200, and the second sealing ring 320 surrounds the transmission and abuts against the connection between the second sub-housing 112 and the transmission shaft 200.

[0068] The first sub-shell is provided with a first connecting hole 140, and the second sub-shell is provided with a second connecting hole 150.

[0069] In this way, by introducing the first sealing ring 310 sleeved on the outer periphery of the transmission shaft 200 and abutting between the transmission housing 110 and the transmission shaft 200, and the second sealing ring 320 sleeved on the outer periphery of the transmission shaft 200 and abutting between the transmission housing 110 and the transmission shaft 200, the first connecting hole 140 and the second connecting hole 150 are blocked by the first sealing ring 310 and the second sealing ring 320 respectively, forming double sealing, effectively preventing impurities such as dust and water from entering the inside of the transmission module 10, reducing the damage of impurities such as dust and water to the bearing 120 inside the transmission module 10, and prolonging the service life of the transmission module 10.

[0070] Since the transmission housing 110 includes the first sub-shell 111 and the second sub-shell 112, there is a gap between the first sub-shell 111 and the second sub-shell 112, therefore, in order to avoid impurities such as dust and water from flowing into the transmission module 10 from the connection between the first sub-shell 111 and the second sub-shell 112, the sealing effect of the whole transmission module 10 is improved.

[0071] In some embodiments, the sealing assembly 300 further includes a third sealing ring 330, which is arranged around the circumference of the transmission shaft 200, and the third sealing ring 330 is located at the end of the first sub-shell 111 and abuts between the first sub-shell 111 and the second sub-shell 112.

[0072] In this way, by introducing the third sealing ring 330 at the connection between the first sub-shell 111 and the second sub-shell 112, impurities such as dust and water can be prevented from flowing into the transmission module 10 from the connection between the first sub-shell 111 and the second sub-shell 112, and the sealing effect of the whole transmission module 10 is improved.

[0073] In some embodiments, the second sub-shell 112 is provided with a positioning groove 1122, and the third sealing ring 330 is embedded in the positioning groove 1122.

[0074] In this way, by embedding the third sealing ring 330 in the positioning groove 1122, the third sealing ring 330 can be prevented from shifting and loosening with the rotation of the transmission shaft 200, and the stability of the connection of the third sealing ring 330 is improved.

[0075] 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

[0076] 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.

[0077] The above summary of the only specific embodiments of the application enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fan, characterized by, The application relates to a fan head, a fan head connecting part and a transmission module. The fan head comprises a mesh cover shell and a fan blade, the fan blade is installed in the mesh cover shell, and one side of the mesh cover shell away from the fan blade is provided with an installation space. The fan head connecting part comprises a motor, and the motor has an output shaft. The transmission module comprises a transmission body, a transmission shaft and a damping sleeve, the damping sleeve and the transmission body are located in the installation space, the transmission shaft is rotatably arranged in the transmission body, one end of the transmission shaft is arranged in the fan blade, and the other end of the transmission shaft is connected to the output shaft; the damping sleeve is wrapped on the outer surface of the transmission body, and the damping sleeve is in abutment between the transmission body and the mesh cover shell.

2. The fan of claim 1, wherein, The damping sleeve comprises a first damping part, the first damping part is arranged in the circumferential direction of the transmission body and is in abutment with the transmission body and the mesh cover shell in the radial direction of the transmission shaft.

3. The fan of claim 2, wherein, The fan head further comprises a pressing cover for limiting the transmission body in the installation space, and the other end of the transmission shaft is arranged in the pressing cover and connected to the output shaft. The damping sleeve comprises a second damping part and a third damping part, the second damping part and the third damping part are arranged in sequence in the axial direction of the transmission shaft, the first damping part is connected between the second damping part and the third damping part, the second damping part is in abutment between the mesh cover shell and the transmission body in the axial direction of the transmission shaft, and the third damping part is in abutment between the transmission body and the pressing cover in the axial direction of the transmission shaft.

4. The fan of claim 2, wherein, The outer periphery of the first damping part is provided with a plurality of first anti-skid protrusions, and the plurality of first anti-skid protrusions are arranged in sequence in the circumferential direction of the first damping part and extend in the axial direction of the transmission shaft.

5. The fan of claim 1, wherein, The damping sleeve is a silica gel damping sleeve or a rubber damping sleeve.

6. The fan of claim 1, wherein, The transmission body comprises a bearing and a transmission shell, the bearing is located in the transmission shell, the inner ring of the bearing is fixedly connected to the transmission shaft, the outer ring of the bearing is fixedly connected to the transmission shell, the inner ring of the bearing can rotate relative to the outer ring of the bearing, and the damping sleeve is wrapped on the outer surface of the transmission shell.

7. The fan of claim 6, wherein, The transmission shell comprises a first sub-shell and a second sub-shell, the second sub-shell and the first sub-shell jointly form an accommodating space, the bearing is located in the accommodating space, the damping sleeve is arranged on the outer surface of the first sub-shell and the outer surface of the second sub-shell, and the second sub-shell is detachably connected to the first sub-shell.

8. The fan of claim 7, wherein, The outer periphery of the first sub-shell is provided with a plurality of second anti-skid protrusions, and the plurality of second anti-skid protrusions are arranged in sequence in the circumferential direction of the first sub-shell and extend in the axial direction of the transmission shaft.

9. The fan of claim 7, wherein, The outer periphery of the first sub-shell is provided with a first buckle structure, the outer periphery of the second sub-shell is provided with a second buckle structure, and the second buckle structure can be matched with the first buckle structure.

10. The fan of claim 7, wherein, The transmission shaft is arranged in the first sub-housing and the second sub-housing, the transmission body further comprises a first sealing ring and a second sealing ring, the first sealing ring is arranged around the transmission and abuts against the connection between the first sub-housing and the transmission shaft, and the second sealing ring is arranged around the transmission and abuts against the connection between the second sub-housing and the transmission shaft.

Images