fan

Abstract

The application discloses a fan, which comprises a motor seat, a driving part arranged in the motor seat, a fan head, a mesh cover structure and a fan blade, wherein the mesh cover structure comprises a first mesh cover and a second mesh cover, the fan blade comprises a connecting shaft and a fan blade, the fan blade is arranged in a space formed by the first mesh cover and the second mesh cover, the fan blade is sleeved on the connecting shaft, the two ends of the connecting shaft are rotatably supported on the first mesh cover and the second mesh cover through bearing structures respectively, and the connecting shaft is connected with the driving part in a power manner. The fan of the embodiment of the application is provided with the bearing structures at the two ends of the connecting shaft, so that the connecting shaft is rotatably supported on the first mesh cover and the second mesh cover of the fan head, the axis of the connecting shaft can be self-adjusted, the stability of the fan during operation is improved, the noise generated during operation of the fan is reduced, the use comfort of the user is improved, the use effect is better, and the application range is wider.

Description

TECHNICAL FIELD

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

[0002] With the improvement of people's living standards, people's requirements for the comfort of household appliances are also getting higher and higher. As a necessary appliance in daily life, the comfort of the fan has become a problem that people pay more and more attention to. In actual use, the existing fan has the problem that the axes of the front clutch, the rear clutch and the connecting shaft do not coincide when the front clutch and the rear clutch are engaged, which affects the stability of the fan operation, causes noise during the operation of the fan, reduces the user's comfort, and there is room for improvement. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a fan which can improve the stability of the fan operation, reduce the noise generated during operation, and thus improve the user's comfort.

[0004] The fan according to the embodiments of the present application comprises: a motor base, wherein a driving member is arranged in the motor base; a fan head, wherein the fan head comprises a mesh cover structure and a fan blade, the mesh cover structure comprises a first mesh cover and a second mesh cover, the fan blade comprises a connecting shaft and a fan blade, the fan blade is located in a space formed by the first mesh cover and the second mesh cover, and the fan blade is sleeved on the connecting shaft, both ends of the connecting shaft are rotatably supported on the first mesh cover and the second mesh cover through bearing structures respectively, and the connecting shaft is power-connected with the driving member.

[0005] The fan according to the embodiments of the present application, by arranging bearing structures at both ends of the connecting shaft, the connecting shaft is rotatably supported on the first mesh cover and the second mesh cover of the fan head, and thus the axis of the connecting shaft can be self-adjusted, the stability of the fan during operation is improved, the noise generated during the operation of the fan is reduced, and thus the user's comfort is improved, the use effect is better, and the application range is wider.

[0006] The fan according to some embodiments of the present application, the first mesh cover and the second mesh cover are detachably connected, the front end of the connecting shaft is rotatably supported on the first mesh cover through a first bearing, and the rear end of the connecting shaft is rotatably supported on the second mesh cover through a second bearing.

[0007] The fan according to some embodiments of the present application, the first mesh cover is provided with a first connecting hole, the first bearing is installed at the first connecting hole, and the first mesh cover and the first bearing are fixed in position along the axial direction; and / or, the second mesh cover is provided with a second connecting hole, the second bearing is installed at the second connecting hole, and the second mesh cover and the second bearing are fixed in position along the axial direction.

[0008] According to some embodiments of the fan, one of the outer circumferential wall of the first bearing and the inner circumferential wall of the first connecting hole is provided with a first limiting protrusion and the other is provided with a first limiting groove, the first limiting protrusion and the first limiting groove are insertedly matched along the radial direction of the first bearing; and / or, one of the outer circumferential wall of the second bearing and the inner circumferential wall of the second connecting hole is provided with a second limiting protrusion and the other is provided with a second limiting groove, the second limiting protrusion and the second limiting groove are insertedly matched along the radial direction of the second bearing.

[0009] According to some embodiments of the fan, the first connecting hole penetrates through the axial direction of the first mesh cover, and the first mesh cover is provided with a decorative plate, the decorative plate covers the open end of the first connecting hole.

[0010] According to some embodiments of the fan, the first bearing and the second bearing are both configured to include an outer support ring and an inner support body, the outer support ring is connected to the corresponding first mesh cover or second mesh cover, the inner support body is rotatably installed in the outer support ring, and the connecting shaft penetrates through the inner support body.

[0011] According to some embodiments of the fan, the connecting shaft includes a main body segment and a front shaft segment and a rear shaft segment connected to both ends of the main body segment respectively, the outer diameter of the front shaft segment is smaller than the outer diameter of the main body segment, and the outer diameter of the rear shaft segment is smaller than or equal to the outer diameter of the main body segment; wherein the first bearing is sleeved outside the front shaft segment, the second bearing and the fan blade are both sleeved outside the main body segment, and the rear shaft segment is power-connected with the driving member.

[0012] According to some embodiments of the fan, a buffering structure is arranged at the connection between the bearing structure and the mesh cover structure.

[0013] The bearing structure is detachably installed in the mesh cover structure, and the buffering structure is configured as a buffering pad, the buffering pad is clamped between the bearing structure and the mesh cover structure.

[0014] According to some embodiments of the fan, further comprising: a pre-tightening structure connected with the connecting shaft and used for axially limiting the connecting shaft.

[0015] The pre-tightening structure is configured as an elastic bearing component, the elastic bearing component includes a bearing part and an elastic part connected with each other, the bearing part is relatively fixed in the axial direction in the fan head, the connecting shaft is rotatably supported in the fan head through the bearing part, and the elastic part applies the elastic force to the connecting shaft.

[0016] Or, the pre-tightening structure is a sleeve, the sleeve is fixedly installed in the fan head in the axial direction, and the sleeve is sleeved on the connecting shaft and fixedly connected with the connecting shaft in the axial direction.

[0017] According to some embodiments of the present application, the connecting shaft is provided with a first coupling element, the output end of the driving element is provided with a second coupling element, and the driving element and the connecting shaft are adapted to be connected through power coupling of the first coupling element and the second coupling element.

[0018] According to some embodiments of the present application, the first coupling element and the second coupling element are configured to be screwed in the circumferential direction of the motor base.

[0019] According to some embodiments of the present application, the motor base is provided with a child lock component and a micro switch, the micro switch is used to control the power state of the driving element, and the child lock component is movably installed on the motor base and used to trigger the micro switch.

[0020] According to some embodiments of the present application, the child lock component comprises a sliding switch plate and a switch pressing plate connected with each other, the sliding switch plate is located outside the motor base, the switch pressing plate and the micro switch are both arranged in the motor base, the micro switch is provided with a trigger spring, and the switch pressing plate is adapted to press against the trigger spring.

[0021] According to some embodiments of the present application, the motor base is provided with a locking bolt, the locking bolt is movable in the radial direction of the motor base, the fan head is provided with a locking portion, and the locking bolt is arranged to be in locking cooperation with the locking portion when the motor base and the fan head are connected.

[0022] According to some embodiments of the present application, the motor base and the fan head are detachably connected.

[0023] According to some embodiments of the present application, the fan further comprises a base, the base is adapted to be supported on a placement surface, and the motor base is installed on the base.

[0024] According to some embodiments of the present application, the fan is characterized in that the fan head is integrally and independently detachable relative to the motor base.

[0025] According to some embodiments of the present application, the fan head is provided with an air outlet, the fan blades are configured as axial flow fan blades, and the axial flow fan blades are adapted to drive the airflow in the fan head to flow to the air outlet in the axial direction of the axial flow fan blades.

[0026] And / or, the radial dimension of the fan head is greater than or equal to twice the radial dimension of the motor base at the position of the driving element, and / or the ratio of the radial dimension to the axial dimension of the fan head is greater than or equal to 1.

[0027] According to some embodiments of the present application, the fan head is adapted to be connected with the motor base along a first direction in an initial position, the first direction being intersected with the vertical direction;

[0028] and the fan head is arranged to be swingable up and / or down and / or left and / or right relative to the motor base from the initial position.

[0029] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be learned by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0031] Figure 1 is a sectional view of a fan head according to an embodiment of the present application Figure 1 ;

[0032] Figure 2 is an exploded view of a fan head according to an embodiment of the present application

[0033] Figure 3 is an exploded view of a base, a motor base according to an embodiment of the present application Figure 1 ;

[0034] Figure 4 is an exploded view of a base, a motor base according to an embodiment of the present application Figure 2 ;

[0035] Figure 5 is a structural schematic view of a fan according to an embodiment of the present application

[0036] Figure 6 is a sectional view of a fan head according to an embodiment of the present application Figure 2 ;

[0037] Figure 7 is a sectional view of a fan according to an embodiment of the present application

[0038] Figure 8 is a structural schematic view of a resilient bearing component according to an embodiment of the present application.

[0039] REFERENCE NUMERALS:

[0040] a fan 100,

[0041] a base 1, a motor base 2, a second coupling member 21, a locking screw 22, a screw cover plate 23, a micro switch 24, a sliding tab 25, a switch pressing plate 26, a locking bolt 27,

[0042] Fan head 3, first mesh cover 31, first connecting hole 311, first limiting protrusion 312, second mesh cover 32, second connecting hole 321, second limiting protrusion 322, connecting shaft 33, main body section 331, front shaft section 332, rear shaft section 333, first bearing 34, first limiting groove 341, second bearing 35, second limiting groove 351, fan blade 36, decorative plate 37, outer support ring 381, inner support body 382, first coupling member 39, gasket 41, fan blade grommet 42, buffer pad 43, elastic bearing component 44, bearing part 441, elastic part 442. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0044] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] The following refers to Figures 1-5 The fan 100 according to the embodiments of the present application is described below, which can improve the stability of the fan 100 operation, reduce the noise generated during operation, and further improve the user's comfort.

[0047] As Figures 1-5As shown, the fan 100 according to the embodiment of the application comprises a motor base 2 and a fan head 3.

[0048] The motor base 2 is provided with a driving member, and the fan head 3 comprises a mesh cover structure and a fan blade. The mesh cover structure comprises a first mesh cover 31 and a second mesh cover 32, and the fan blade comprises a connecting shaft 33 and a fan blade 36. The fan blade 36 is located in a space formed by the first mesh cover 31 and the second mesh cover 32, and is sleeved on the connecting shaft 33. The two ends of the connecting shaft 33 are rotatably supported on the first mesh cover 31 and the second mesh cover 32 through bearing structures, and the connecting shaft 33 is power-connected with the driving member.

[0049] In the embodiment, the base 1 is provided with a circular disc-shaped lower end with a large radius, so that the fan 100 is more stable during use and is less likely to shake or fall over.

[0050] Specifically, the fan 100 is provided with the motor base 2 which can be cylindrical. The motor base 2 is provided with a driving member which can be a driving motor. The driving member is arranged on one side of the motor base 2 and can be used to output power to the outside. The fan 100 is also provided with the fan head 3 which is detachably connected with the motor base 2. Therefore, the fan head 3 can be removed for cleaning, so as to ensure that the fan 100 blows clean air.

[0051] The fan head 3 is provided with the mesh cover structure which is detachably connected with the motor base 2. The fan head 3 is also provided with the fan blade which is arranged in a space formed by the mesh cover structure and can be rotated by the power output by the driving member, so as to generate airflow. The fan blade is provided with the connecting shaft 33 and the fan blade 36. The mesh cover structure is provided with the first mesh cover 31 and the second mesh cover 32. The fan blade 36 is arranged in a space formed by the first mesh cover 31 and the second mesh cover 32 and is sleeved on the connecting shaft 33. The fan blade 36 is circumferentially fixedly connected with the connecting shaft 33. One end of the connecting shaft 33 is connected with the driving member, and the other end is provided with a fan blade nut 42. The power output by the driving member can act on the connecting shaft 33, so as to rotate the connecting shaft 33 and drive the fan blade 36 to rotate. Two bearing structures are also arranged in the mesh cover structure and are sleeved on the two ends of the connecting shaft 33, so as to provide support for the connecting shaft 33. The connecting shaft 33 can be rotatably supported on the first mesh cover 31 and the second mesh cover 32 through the two bearing structures. Therefore, the axis of the connecting shaft 33 can be self-adjusted, so as to reduce the vibration generated by the connecting shaft 33 during power transmission and improve the stability of the fan 100 during operation.

[0052] Further, the base 1 is located at the bottom, the motor base 2 is located at the upper end of the base 1, and the fan head 3 is located at the output end of the driving member of the motor base 2. When the fan 100 operates, the driving member outputs power to the connecting shaft 33, the connecting shaft 33 rotates to drive the fan blade 36 to rotate, thereby generating airflow. In the process of power transmission, the bearing structure at both ends of the connecting shaft 33 can provide support force to the connecting shaft 33. At the same time, when the driving member outputs, the bearing structure at both ends of the connecting shaft 33 can adjust the axis of the connecting shaft 33, so that the power output by the driving member can be smoothly transmitted to the connecting shaft 33, thereby making the fan 100 run more smoothly. In addition, the fan head 3 and the mesh cover structure are detachably connected, so that the installation and disassembly of the fan head 3 are more convenient.

[0053] According to the fan 100 of the embodiment of the application, the bearing structure is arranged at both ends of the connecting shaft 33, so that the connecting shaft 33 is rotatably supported on the first mesh cover 31 and the second mesh cover 32 of the fan head 3. In this way, the axis of the connecting shaft 33 can be self-adjusted, the stability of the fan 100 during operation is improved, the noise generated during operation of the fan 100 is reduced, the use comfort of the user is improved, the use effect is better, and the application range is wider.

[0054] In some embodiments, the first mesh cover 31 and the second mesh cover 32 are detachably connected, the front end of the connecting shaft 33 is rotatably supported on the first mesh cover 31 through the first bearing 34, and the rear end of the connecting shaft 33 is rotatably supported on the second mesh cover 32 through the second bearing 35.

[0055] Specifically, as shown in Figures 1-2 The mesh cover structure is provided with the first mesh cover 31 and the second mesh cover 32, the first mesh cover 31 and the second mesh cover 32 are respectively installed at both ends of the fan head 3, the second mesh cover 32 is installed at the side of the fan head 3 close to the motor base 2, the first mesh cover 31 is installed at the side of the fan head 3 away from the motor base 2, and the first mesh cover 31 and the second mesh cover 32 are detachably connected. The fan blade and the connecting shaft 33 are installed in the space formed by the first mesh cover 31 and the second mesh cover 32. One end of the connecting shaft 33 is provided with the first bearing 34, the other end of the connecting shaft 33 is provided with the second bearing 35, the first bearing 34 is arranged at the end of the connecting shaft 33 away from the driving member, that is, the first bearing 34 is arranged on the first mesh cover 31, and the second bearing 35 is arranged at the end of the connecting shaft 33 close to the driving member, that is, the second bearing 35 is arranged on the second mesh cover 32. In this way, the front end of the connecting shaft 33 is rotatably supported on the first mesh cover 31 through the first bearing 34, and the rear end of the connecting shaft 33 is rotatably supported on the second mesh cover 32 through the second bearing 35.

[0056] It should be noted that the first mesh cover 31 is constructed as a flat disc structure, and the second mesh cover 32 is constructed as an arc-shaped bowl structure, which creates an internal space for the fan blades to rotate. The edge of the second mesh cover 32 is a mesh structure formed by multiple metal wires, which ensures that the airflow generated when the fan blades rotates is directed as much as possible to the air outlet formed in the first mesh cover 31, thereby improving the efficiency of the fan 100. Furthermore, the first mesh cover 31 and the second mesh cover 32 can prevent personal injury and short circuits caused by interference from people or other objects. In other words, the first mesh cover 31 and the second mesh cover 32 serve to prevent foreign objects from touching the internal structure of the fan 100.

[0057] In some embodiments, the first mesh cover 31 is provided with a first connecting hole 311, the first bearing 34 is installed at the first connecting hole 311, and the first mesh cover 31 and the first bearing 34 are axially limited and fixed; and / or, the second mesh cover 32 is provided with a second connecting hole 321, the second bearing 35 is installed at the second connecting hole 321, and the second mesh cover 32 and the second bearing 35 are axially limited and fixed, that is, the first mesh cover 31 is provided with a first connecting hole 311, the first bearing 34 is installed at the first connecting hole 311, and the first mesh cover 31 and the first bearing 34 are axially limited. The first mesh cover 31 is fixed, and the second bearing 34 is installed at the second connecting hole 321. The second mesh cover 32 and the second bearing 35 are fixed along the axial direction. Alternatively, only the first mesh cover 31 is provided with the first connecting hole 311, and the first bearing 34 is installed at the first connecting hole 311. The first mesh cover 31 and the first bearing 34 are fixed along the axial direction. Alternatively, only the second mesh cover 32 is provided with the second connecting hole 321, and the second bearing 35 is installed at the second connecting hole 321. The second mesh cover 32 and the second bearing 35 are fixed along the axial direction.

[0058] Specifically, in this embodiment, such as Figure 1 As shown, the first mesh cover 31 is provided with a first connecting hole 311, the radial size of which matches the radial size of the first bearing 34, so that the first bearing 34 is installed at the first connecting hole 311, and the first mesh cover 31 and the first bearing 34 are axially limited and fixed, thereby restricting the axial movement of the first bearing 34 relative to the first mesh cover 31. At the same time, the second mesh cover 32 is provided with a second connecting hole 321, the radial size of which matches the radial size of the second bearing 35, the second bearing 35 is installed at the second connecting hole 321, and the second mesh cover 32 and the second bearing 35 are axially limited and fixed, thereby restricting the axial movement of the second bearing 35 relative to the second mesh cover 32. This allows the first bearing 34 and the second bearing 35 to be fixed to the housing, so that the connecting shaft 33 can be rotatably supported on the housing through the first bearing 34 and the second bearing 35, and its own axial position can be adjusted to ensure transmission stability.

[0059] In some embodiments, one of the outer circumferential wall of the first bearing 34 and the inner circumferential wall of the first connecting hole 311 is provided with the first limiting protrusion 312 and the other is provided with the first limiting recess 341, and the first limiting protrusion 312 and the first limiting recess 341 are insertedly fitted along the radial direction of the first bearing 34; and / or, one of the outer circumferential wall of the second bearing 35 and the inner circumferential wall of the second connecting hole 321 is provided with the second limiting protrusion 322 and the other is provided with the second limiting recess 351, and the second limiting protrusion 322 and the second limiting recess 351 are insertedly fitted along the radial direction of the second bearing 35.

[0060] Specifically, one of the outer circumferential wall of the first bearing 34 and the inner circumferential wall of the first connecting hole 311 is provided with the first limiting protrusion 312 and the other is provided with the first limiting recess 341, and the first limiting protrusion 312 and the first limiting recess 341 are insertedly fitted along the radial direction of the first bearing 34, and meanwhile, one of the outer circumferential wall of the second bearing 35 and the inner circumferential wall of the second connecting hole 321 is provided with the second limiting protrusion 322 and the other is provided with the second limiting recess 351, and the second limiting protrusion 322 and the second limiting recess 351 are insertedly fitted along the radial direction of the second bearing 35, or only one of the outer circumferential wall of the first bearing 34 and the inner circumferential wall of the first connecting hole 311 is provided with the first limiting protrusion 312 and the other is provided with the first limiting recess 341, and the first limiting protrusion 312 and the first limiting recess 341 are insertedly fitted along the radial direction of the first bearing 34, or only one of the outer circumferential wall of the second bearing 35 and the inner circumferential wall of the second connecting hole 321 is provided with the second limiting protrusion 322 and the other is provided with the second limiting recess 351, and the second limiting protrusion 322 and the second limiting recess 351 are insertedly fitted along the radial direction of the second bearing 35.

[0061] Further, in the present embodiment, as shown in Figure 1 one of the outer circumferential wall of the first bearing 34 and the inner circumferential wall of the first connecting hole 311 is provided with the first limiting protrusion 312 and the other is provided with the first limiting recess 341, that is, the first limiting protrusion 312 can be arranged on the outer circumferential wall of the first bearing 34 or on the inner circumferential wall of the first connecting hole 311, and the first limiting recess 341 can be arranged on the outer circumferential wall of the first bearing 34 or on the inner circumferential wall of the first connecting hole 311, when the first limiting protrusion 312 is arranged on the outer circumferential wall of the first bearing 34, the first limiting recess 341 is arranged on the inner circumferential wall of the first connecting hole 311; conversely, when the first limiting protrusion 312 is arranged on the inner circumferential wall of the first connecting hole 311, the first limiting recess 341 is arranged on the outer circumferential wall of the first bearing 34, in the present embodiment, the first limiting protrusion 312 is arranged on the inner circumferential wall of the first connecting hole 311 and the first limiting recess 341 is arranged on the outer circumferential wall of the first bearing 34, and the first limiting protrusion 312 and the first limiting recess 341 are insertedly fitted along the radial direction of the first bearing 34, so that the first mesh cover 31 and the first bearing 34 are fixedly positioned along the axial direction.

[0062] Meanwhile, as shown in Figure 1 one of the outer peripheral wall of the second bearing 35 and the inner peripheral wall of the second connecting hole 321 is provided with the second limiting protrusion 322 and the other is provided with the second limiting groove 351, that is, the second limiting protrusion 322 can be provided on the outer peripheral wall of the second bearing 35, or on the inner peripheral wall of the second connecting hole 321, and the second limiting groove 351 can be provided on the outer peripheral wall of the second bearing 35, or on the inner peripheral wall of the second connecting hole 321, when the second limiting protrusion 322 is provided on the outer peripheral wall of the second bearing 35, the second limiting groove 351 is provided on the inner peripheral wall of the second connecting hole 321; conversely, when the second limiting protrusion 322 is provided on the inner peripheral wall of the second connecting hole 321, the second limiting groove 351 is provided on the outer peripheral wall of the second bearing 35, in this embodiment, the second limiting protrusion 322 is provided on the inner peripheral wall of the second connecting hole 321, and the second limiting groove 351 is provided on the outer peripheral wall of the second bearing 35, the second limiting protrusion 322 and the second limiting groove 351 are inserted and matched along the radial direction of the second bearing 35, so that the second mesh cover 32 and the second bearing 35 are limited and fixed in the axial direction.

[0063] In some embodiments, the first connecting hole 311 penetrates through the first mesh cover 31 in the axial direction of the first mesh cover 31, and the first mesh cover 31 is provided with a decorative plate 37 covering the open end of the first connecting hole 311.

[0064] Specifically, as shown in Figure 1 the first connecting hole 311 penetrates through the first mesh cover 31 in the axial direction of the fan head 3, one end of the first connecting hole 311 close to the motor base 2 is matched with the first bearing 34 to support the connecting shaft 33, and the other end of the first connecting hole 311 away from the motor base 2 is in communication with the outside, and the decorative plate 37 is arranged on the side of the first mesh cover 31 away from the second mesh cover 32, the decorative plate 37 is detachable relative to the first mesh cover 31, and the decorative plate 37 covers the open end of the first connecting hole 311, so that the fan head 3 is more convenient to disassemble, and the first connecting hole 311 is protected to improve the safety in use, and at the same time, the internal structure is not visible on the front side of the fan 100, so that the overall structure of the fan 100 is regular, and the visual comfort of the user is ensured.

[0065] In some embodiments, the first bearing 34 and the second bearing 35 are both configured to include an outer support ring 381 and an inner support body 382, that is, the first bearing 34 is provided with the outer support ring 381 and the inner support body 382, and the second bearing 35 is provided with the outer support ring 381 and the inner support body 382.

[0066] Specifically, as shown in Figure 1As shown, the outer support ring 381 is connected with the corresponding first mesh cover 31 or second mesh cover 32, that is, the outer peripheral wall of the outer support ring 381 is connected with the inner peripheral wall of the first connecting hole 311 of the first mesh cover 31 or the inner peripheral wall of the second connecting hole 321 of the second mesh cover 32, and the inner support body 382 is rotatably installed in the outer support ring 381, that is, the inner peripheral wall of the outer support ring 381 is connected with the outer peripheral wall of the inner support body 382, and the connecting shaft 33 penetrates through the inner support body 382, the inner support body 382 is provided with a connecting hole, the size of the connecting hole matches the connecting shaft 33, so that the connecting shaft 33 can be supported on the inner support body 382, and the inner support body 382 is rotatably installed in the outer support ring 381, that is, the connecting shaft 33 is rotatably installed in the outer support ring 381, and thus the connecting shaft 33 can rotate relative to the shell, so as to transmit power to the fan blade 36 through the connecting shaft 33.

[0067] In some embodiments, as shown in the drawings, Figure 1 As shown, the connecting shaft 33 includes a main body section 331 and a front shaft section 332 and a rear shaft section 333 connected to both ends of the main body section 331 respectively, the outer diameter of the front shaft section 332 is smaller than the outer diameter of the main body section 331, and the outer diameter of the rear shaft section 333 is smaller than or equal to the outer diameter of the main body section 331, the connecting shaft 33 is provided with the front shaft section 332, the front shaft section 332 is arranged at one end of the connecting shaft 33 away from the motor base 2, the connecting shaft 33 is provided with the rear shaft section 333, the rear shaft section 333 is arranged at one end of the connecting shaft 33 close to the motor base 2, and the main body section 331 is arranged between the front shaft section 332 and the rear shaft section 333, and the outer diameter of the front shaft section 332 is smaller than the outer diameter of the main body section 331, and the outer diameter of the rear shaft section 333 is smaller than or equal to the outer diameter of the main body section 331.

[0068] Among them, the first bearing 34 is sleeved outside the front shaft section 332, the second bearing 35 and the fan blade 36 are both sleeved outside the main body section 331, the rear shaft section 333 is in power connection with the driving member, the first bearing 34 is sleeved outside the front shaft section 332, the radial size of the connecting hole of the inner support body 382 of the first bearing 34 matches the radial size of the front shaft section 332, and the outer diameter of the front shaft section 332 is smaller than the outer diameter of the main body section 331, thereby limiting the displacement of the connecting shaft 33 in the axial direction, the fan blade 36 is sleeved outside the main body section 331, and the fan 100 can generate airflow by rotating the fan blade 36 during operation, at the same time, the fan blade 36 will be subjected to the reaction force generated by the airflow, the force will be conducted along the fan blade 36 to the connecting shaft 33, the main body section 331 is provided with a large outer diameter size, which can improve the structural strength of the main body section 331, and avoid the bending of the connecting shaft 33 due to excessive force.

[0069] In some embodiments, a buffer structure is arranged at the connection between the bearing structure and the mesh cover structure.

[0070] Specifically, the mesh structure is further provided with a bearing structure, the bearing structure can provide support for the connecting shaft 33, so that the connecting shaft 33 can be rotatably supported on the mesh structure through the bearing structure, and a buffer structure is arranged at the connection position of the bearing structure and the mesh structure, thereby reducing the vibration of the connecting shaft 33 during power transmission and improving the stability of the fan 100 during operation. During power transmission, the bearing structure can provide support for the connecting shaft 33, and when the fan blade 36 rotates, an acting force is generated on the bearing structure, which can be transmitted to the buffer structure through the bearing structure, thereby weakening the effect of the acting force on the fan head 3, so that the fan 100 operates more stably.

[0071] The bearing structure is detachably mounted on the mesh structure, and the buffer structure is a buffer pad 43 clamped between the bearing structure and the mesh structure.

[0072] Further, as shown in Figure 6 The bearing structure is arranged between the mesh structure and the connecting shaft 33 and can be used to provide support for the connecting shaft 33, and the bearing structure needs to be regularly maintained during use. The bearing structure is detachably mounted on the mesh structure, which can save maintenance time. When the bearing structure is damaged, only the bearing structure needs to be replaced, which saves costs.

[0073] At the same time, when the fan 100 operates, the fan blade 36 rotates and generates an acting force on the connecting shaft 33 connected thereto, and the acting force is then transmitted to the bearing structure through the connecting shaft 33. The bearing structure is arranged as a separate component, so that the acting force increases the transmission path during transmission, thereby weakening the effect. The bearing structure and the housing are provided with a buffer structure, which can be a buffer pad 43. When the acting force is transmitted to the housing through the bearing structure, the buffer pad 43 can be used for buffering, further weakening the effect of the acting force, and improving the stability of the fan 100 during operation.

[0074] In some embodiments, the fan 100 further comprises a pre-tightening structure.

[0075] Specifically, as shown in Figure 7 The pre-tightening structure is connected to the connecting shaft 33 and is used for axial positioning of the connecting shaft 33. The pre-tightening structure is connected to the connecting shaft 33 and is used for axial positioning of the connecting shaft 33. The pre-tightening structure can be connected to the end of the connecting shaft 33 to control the axial gap of the connecting shaft 33. The connecting shaft 33 can have a dynamic gap control function when rotating, and the connecting shaft 33 can have a suitable gap in the axial direction to avoid axial movement during rotation inside the fan 100 and affect the stability of the fan 100 during operation.

[0076] Therefore, by setting the pre-tightening structure at the output end of the connecting shaft 33, the axial gap of the connecting shaft 33 can be controlled, which is conducive to the smooth rotation of the output end of the connecting shaft 33, and further can make the rotation of the fan blade smooth, can avoid the vibration and friction of the connecting shaft 33 along the axial direction, can realize the effect of noise reduction, can make the power transmission of the driving member and the connecting shaft 33 more efficient, can enhance the use function of the fan 100, can improve the service life of the product and the use experience of the user, and the structure is simple and has strong applicability.

[0077] The pre-tightening structure is configured as an elastic bearing part 44, the elastic bearing part 44 includes a bearing part 441 and an elastic part 442 connected together, the bearing part 441 is relatively fixed in the axial direction in the fan head 3, and the connecting shaft 33 is rotatably supported in the fan head 3 through the bearing part 441, and the elastic part 442 applies an elastic force towards the connecting shaft 33.

[0078] Further, as shown in Figure 8 The elastic bearing part 44 includes two parts, one part is the bearing part 441, and the other part is the elastic part 442, the bearing part 441 and the elastic part 442 are connected to form the elastic bearing part 44, wherein the bearing part 441 is relatively fixed with the fan head 3 in the axial direction, which can realize the fixation of the bearing part 441 and the fixation of the elastic bearing part 44, wherein the elastic bearing part 44 is configured in a circular ring shape, and the elastic bearing part 44 is coaxially connected with the connecting shaft 33, which can rotatably support the connecting shaft 33 inside the fan head 3, can realize the connection of the connecting shaft 33, and the connecting shaft 33 can rotate relative to the fan head 3, and the elastic part 442 can apply an elastic force towards the connecting shaft 33 for adjusting the axial gap of the connecting shaft 33.

[0079] When the axial gap of the connecting shaft 33 is too large, the elastic part 442 of the pre-tightening structure will release and absorb the excess gap to apply an elastic force to the connecting shaft 33 towards the driving member, which can reduce the axial gap of the connecting shaft 33; when the axial gap of the connecting shaft 33 is small, the elastic part 442 of the pre-tightening structure will be compressed by the connecting shaft 33, which can release a certain axial gap for the connecting shaft 33, which can increase the axial gap of the connecting shaft 33, which can avoid the axial gap being too small to make the connecting shaft 33 rotate smoothly, thus the elastic part 442 can comprehensively adjust the axial gap of the connecting shaft 33 to ensure that the axial gap of the connecting shaft 33 is more stable.

[0080] Therefore, by setting the elastic bearing part 44 as described above, the connection of the elastic bearing part 44 and the connecting shaft 33 and the adjustment of the axial gap of the connecting shaft 33 can be realized at the same time, and the axial gap of the connecting shaft 33 can be dynamically controlled, which can make the connecting shaft 33 have a suitable gap along the axial direction, and improve the stability of the fan 100 in operation.

[0081] Or the pre-tightening structure is configured as a sleeve which is fixedly installed in the fan head 3 along the axial direction and is sleeved on the connecting shaft 33 and fixedly connected with the connecting shaft 33 along the axial direction.

[0082] Further, the pre-tightening structure can be configured as a sleeve which is installed in the fan head 3 along the axial direction and is installed at the end of the connecting shaft 33. In actual design, the sleeve can be configured as a circular ring, the sleeve is sleeved on the connecting shaft 33, and the two ends of the sleeve are fixedly connected along the axial direction, so that the sleeve is fixedly installed. The sleeve can have two forms, one of which is rigid, which can ensure that the axial gap of the connecting shaft 33 is a fixed value during the operation of the connecting shaft 33 and meet the requirement of the axial gap of the connecting shaft 33, and the other of which is elastic, which can make the sleeve compressible, so that the axial gap of the connecting shaft 33 can be controlled within a certain range during the operation of the connecting shaft 33, thereby dynamically controlling the axial gap of the connecting shaft 33 to meet the requirement of the axial gap of the connecting shaft 33.

[0083] Therefore, the pre-tightening structure is configured as a sleeve, which has simple structure and low manufacturing cost. Meanwhile, the material of the sleeve can be rigid or elastic, so that the pre-tightening structure is flexible and optional, and the axial gap of the connecting shaft 33 can meet the requirement, thereby ensuring the smooth operation of the connecting shaft 33.

[0084] In some embodiments, the connecting shaft 33 is provided with a first coupling member 39, and the output end of the driving member is provided with a second coupling member 21, so that the driving member and the connecting shaft 33 are connected through the power coupling of the first coupling member 39 and the second coupling member 21.

[0085] Specifically, as shown in FIG. 2, the connecting shaft 33 is provided with a first coupling member 39, and the output end of the driving member is provided with a second coupling member 21, so that the driving member and the connecting shaft 33 are connected through the power coupling of the first coupling member 39 and the second coupling member 21. Figures 1-4As shown, the fan 100 is provided with a motor base 2 for mounting a driving member which can output power outward, and the output end of the driving member is provided with a second coupling member 21 which is connected with the driving member through a locking screw 22, and the locking screw 22 is closed by a screw cover plate 23 near the side of the fan head 3, so that the second coupling member 21 can be detached while the safety can be improved, and the gasket 41 is also arranged at the locking screw 22 to increase the stress area and ensure the connection reliability, and the fan 100 is also provided with the fan head 3 in which the fan blades are mounted, and the fan blades are rotatably mounted in the shell of the fan head 3 and are provided with the fan blade 36 and the connecting shaft 33, and the fan head 3 is provided with a first coupling member 39 which is arranged on the side of the fan head 3 near the motor base 2 and is connected with the fan blades arranged inside the fan head 3 near the side of the fan head 3, and the gasket 41 is arranged between the first coupling member 39 and the connecting shaft to increase the stress area and ensure the connection reliability, and the second coupling member 21 and the first coupling member 39 are connected in power coupling, and the power output by the driving member can be used to rotate the fan blades to generate airflow, and the power output by the driving member can be output to the first coupling member 39 through the second coupling member 21 and then transmitted to the fan blades to rotate the fan blades.

[0086] Further, when the fan 100 operates, the driving member in the motor base 2 outputs power, the output end of the driving member near the fan head 3 is connected with the second coupling member 21, the power output by the driving member can be output through the second coupling member 21, and the second coupling member 21 and the first coupling member 39 are connected in power coupling, and the first coupling member 39 is connected with the fan blades, so that the first coupling member 39 can drive the fan blades to rotate and then generate airflow to realize the normal operation of the fan 100.

[0087] In some embodiments, the first coupling member 39 and the second coupling member 21 are configured to be screwed along the circumference of the motor base 2.

[0088] Specifically, when the fan 100 operates, the driving member arranged inside the motor base 2 outputs power, and the power can be output to the first coupling member 39 through the second coupling member 21 to rotate the fan blades, and the fan blades generate airflow by rotating, and at the same time the airflow can apply a reaction force to the fan blades, the force can be conducted to the second coupling member 21 through the fan blades, and the first coupling member 39 and the second coupling member 21 are arranged to be screwed along the circumference of the motor base 2, and under the action of the force, the connection between the first coupling member 39 and the second coupling member 21 is more tight, which ensures the reliability of power transmission and improves the stability of the operation of the fan 100.

[0089] In some embodiments, the motor base 2 is provided with a child lock component and a micro switch 24, the micro switch 24 is used to control the power state of the driving member, and the child lock component is movably mounted on the motor base 2 and is used to trigger the micro switch 24.

[0090] Specifically, asFigure 3 As shown, a child lock component and a micro switch 24 are provided on the upper end of the motor base 2 near the fan head 3. The child lock component is a long strip-shaped structure extending circumferentially along the connection. The child lock component is movably installed on the motor base 2 and is used to trigger the micro switch 24. The micro switch 24 can be used to control the power state of the drive component. When the child lock component triggers the micro switch 24, the drive component operates. When the child lock component moves away from the micro switch 24, the drive component stops operating. Therefore, after the fan head 3 is removed, the operation of the drive component can be stopped, improving the safety of use.

[0091] In some embodiments, the child lock component includes a connected sliding paddle 25 and a switch plate 26. The sliding paddle 25 is located outside the motor base 2, and the switch plate 26 and the micro switch 24 are both located inside the motor base 2. The micro switch 24 is provided with a trigger spring, and the switch plate 26 is adapted to press against the trigger spring.

[0092] Specifically, such as Figure 3 As shown, the child lock component includes a sliding paddle 25 and a switch plate 26. The sliding paddle 25 is connected to the switch plate 26 and is located outside the motor base 2 for easy operation by the user. The switch plate 26 and a micro switch 24 are located inside the motor base 2. When the user moves the sliding paddle 25, the switch plate 26 and the micro switch 24 can be operated. The micro switch 24 is equipped with a trigger spring, and the switch plate 26 can press against the trigger spring. When the user closes the sliding paddle 25, the micro switch 24 is pressed against the trigger spring, thereby causing the drive component to operate and improving safety.

[0093] In some embodiments, the motor base 2 is provided with a locking pin 27, which is movable in the radial direction of the motor base 2, and the fan head 3 is provided with a locking part. The locking pin 27 is configured to lock into the locking part when the motor base 2 is connected to the fan head 3.

[0094] Specifically, such as Figure 3 As shown, the motor base 2 is provided with a locking pin 27, which is movable radially along the motor base 2. The fan head 3 is provided with a locking part. The locking pin 27 is configured to engage with the locking part when the motor base 2 and the fan head 3 are connected. When the locking pin 27 is not engaged with the locking part, the fan head 3 can move relative to the motor base 2. When the locking pin 27 engages with the locking part, it restricts the displacement of the fan head 3 relative to the motor base 2, thus playing a locking and limiting role. This further ensures the reliability of the engagement between the fan head 3 and the motor base 2, prevents the fan head 3 from detaching from the motor base 2 during use, and improves the safety of use.

[0095] In some embodiments, the motor mount 2 and the fan head 3 are detachably connected.

[0096] Specifically, the fan head 3 is provided with a first connecting part near the motor base 2, the motor base 2 is provided with a second connecting part near the fan head 3, the first connecting part and the second connecting part can be connected by plug-in and the like, and after the first connecting part and the second connecting part are connected by plug-in, the locking pin 27 can be plugged into the locking hole, so that the fan head 3 is fixed relative to the motor base 2, and after the locking pin 27 is taken out of the locking hole, the fan head 3 can be separated from the motor base 2, so as to realize the installation and disassembly of the fan head 3 relative to the motor base 2. This way of disassembling the fan head 3 is simple, easy and convenient for disassembling and cleaning the fan head 3, so that the fan head 3 can be taken off for cleaning, to ensure that the fan 100 blows clean air and improves the user experience.

[0097] In some embodiments, the fan 100 further comprises a base 1 adapted to be supported on a placement surface, and the motor base 2 is installed on the base 1.

[0098] Specifically, as shown in Figure 5 The base 1 is located at the lower part of the fan 100, and the base 1 is relatively high, the motor base 2 is installed at the upper end of the base 1, the connection of the motor base 2 and the base 1 can be achieved, and the base 1 is used to support the motor base 2 and the fan head 3. In the working and non-working states of the fan 100, the base 1 is supported on the placement surface, which can make the fan 100 more stable. The fan 100 can be placed on the ground through the base 1, that is, the fan 100 can be placed on the ground. This kind of floor fan is beneficial to the overall stable placement of the fan 100, and in actual use, the fan 100 can be set as a desktop type or a wall-mounted type, and the length of the rod provided by the base 1 of the fan 100 can be selected according to actual use. When the fan 100 is set as a desktop type, the length of the rod provided by the base 1 can be selected to be relatively short, and when the fan 100 is set as a wall-mounted type, the rod-shaped structure of the base 1 can be omitted.

[0099] In some embodiments, the fan head 3 is independently detachable relative to the motor base 2, so that the fan head 3 can be completely and independently detached from the motor base 2. In this way, the user can independently clean the fan head 3 when cleaning the fan 100, which not only improves the cleaning efficiency, but also facilitates the user to increase the cleaning frequency, ensures that the fan 100 can always blow clean and fresh air, and improves the user experience.

[0100] It should be noted that in actual design, the fan head 3 and the internal fan blades can be regarded as a whole, and the motor base 2 and the internal motor can be regarded as a whole. When the fan head 3 and the motor base 2 are integrally disassembled and assembled, the mesh structure of the fan head 3 and the shell of the motor base 2 can be directly disassembled or connected. The disassembly structure is simple, the connection relationship is not complex, the disassembly time of the fan head 3 relative to the motor base 2 is greatly reduced, and the internal structure of the fan head 3 can be disassembled and cleaned after the fan head 3 is disassembled from the motor base 2 as a whole, which meets the cleaning needs of the user.

[0101] In some embodiments, the fan head 3 is provided with an air outlet hole, and the fan blade is configured as an axial fan blade. The axial fan blade is suitable for driving the airflow in the fan head 3 to flow to the air outlet hole in the axial direction of the axial fan blade. That is, the fan blade of the fan 100 in the present application is different from the traditional centrifugal fan blade, and axial air inlet and axial air outlet can be realized. In actual operation, the axial fan blade rotates, and the airflow behind the axial fan blade flows forward in the axial direction, and then flows to the air outlet hole in the front of the fan head 3 to be delivered to the user's face.

[0102] It should be noted that the fan head 3 can be provided with an air inlet hole. The air inlet hole can be arranged on the rear side of the fan head 3 for axial air inlet, or arranged on the circumferential outer side of the fan head 3 for oblique air inlet, which can realize the air inlet function of the fan head 3. The airflow entering the fan head 3 can flow to the axial rear end of the axial fan blade, and then flow forward in the axial direction under the action of the axial fan blade to the air outlet hole. In particular, the air inlet hole can be arranged on the rear side of the fan head 3, and the motor base 2 is provided with a heat dissipation flow channel, so that the heat dissipation flow channel communicates with the air inlet hole. Under the driving action of the axial fan blade, the airflow flows to the user from the air inlet hole after the driving member is cooled in the heat dissipation flow, which not only facilitates air supply, but also realizes internal heat dissipation of the motor base 2.

[0103] The radial dimension of the fan head 3 is greater than or equal to twice the radial dimension of the motor base 2 at the position of the driving member, and / or the ratio of the radial dimension to the axial dimension of the fan head 3 is greater than or equal to 1. Thus, the fan 100 in the present application is different from the traditional cross-flow impeller. It should be noted that the traditional tower fan uses a cross-flow impeller, and the radial dimension of the tower fan at each position in the axial direction has no obvious change. The radial dimension of the fan head 3 in the present application is much larger than the radial dimension of the motor base 2 at the position of the driving member.

[0104] At the same time, compared with the centrifugal fan blade, the axial fan blade is arranged, which is beneficial to the stable placement of the fan head 3 and the motor base 2, and ensures the stability of the position state of the fan 100.

[0105] In some embodiments, the fan head 3 is adapted to be connected with the motor base 2 along a first direction in the initial position, the first direction intersecting with the vertical direction. That is, when the fan head 3 is in the initial position relative to the motor base 2, the fan head 3 can be moved relative to the motor base 2 along the first direction, so as to be connected and fixed with the motor base 2. For example, when the first direction is along the horizontal direction, the fan head 3 can be installed on the front end of the motor base 2 from front to back along the horizontal direction, so as to be connected and fixed with the motor base 2 along the horizontal direction.

[0106] In some embodiments, the first direction can also form a certain inclination angle relative to the horizontal direction, and both intersect with the vertical direction. That is, the first direction can be inclined upward or downward relative to the horizontal direction, so that the installation of the fan head 3 is more flexible.

[0107] In some embodiments, the fan head 3 is arranged to be swingable up and down and / or left and right relative to the motor base 2 from the initial position. That is, after the fan head 3 is connected and fixed with the motor base 2, the user can further adjust the angle of the fan head 3. For example, the fan head 3 and the motor base 2 are jointly installed on the base 1, and the fan head 3 can be driven to adjust and adjust in different directions upward, downward, leftward and rightward relative to the base 1. At this time, the fan head 3 can be adjusted to be parallel to the vertical direction along the axis, so that the adjustment range of the fan head 3 is larger, and the air supply demand of the user in more directions is met.

[0108] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0109] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fan, characterized by, The utility model provides a fan, including: Motor base, drive piece is equipped in the motor base in; Fan head, the fan head includes mesh cover structure and fan blade, the mesh cover structure includes first mesh cover and second mesh cover, the fan blade includes connecting shaft and fan blade, the fan blade is located in the space formed by the first mesh cover and the second mesh cover, and the fan blade is sleeved on the connecting shaft, both ends of the connecting shaft are rotatably supported on the first mesh cover and the second mesh cover through bearing structure respectively, and the connecting shaft is power connected with the drive piece; The upper end of the motor base near the fan head side is equipped with child lock part and micro switch, the child lock part is the long strip cover structure of the extension along the circumferential of the connecting place of the motor base and the fan head, the child lock part is movably installed on the motor base and is used for triggering the micro switch, the micro switch is used for controlling the power state of the drive piece, the drive piece operates after the child lock part triggers the micro switch, and the drive piece stops operating after the child lock part is away from the micro switch; The child lock part includes the sliding switch plate and the switch pressure plate of being connected, the sliding switch plate is located outside the motor base, the switch pressure plate and the micro switch are all equipped in the motor base, the micro switch is equipped with trigger spring, when the sliding switch plate is removed, the switch pressure plate is suitable for pressing on the trigger spring, the micro switch is pressed on the trigger spring after the sliding switch plate is closed, and the drive piece runs; The motor base is equipped with locking bolt, the locking bolt is movable along the radial of the motor base, the fan head is equipped with locking part, the locking bolt is arranged as when the motor base and the fan head are connected with the locking part locking cooperation, when the locking bolt is not matched with the locking part, the fan head moves relative to the motor base, when the locking bolt is matched with the locking part, the displacement of the fan head relative to the motor base is limited.

2. The fan of claim 1, wherein, The first mesh cover and the second mesh cover are detachably connected, the front end of the connecting shaft is rotatably supported on the first mesh cover through the first bearing, and the rear end of the connecting shaft is rotatably supported on the second mesh cover through the second bearing.

3. The fan of claim 2, wherein, The first mesh cover is provided with a first connecting hole, the first bearing is installed at the first connecting hole, and the first mesh cover and the first bearing are fixed in the axial direction. And / or, the second mesh cover is provided with a second connecting hole, the second bearing is installed at the second connecting hole, and the second mesh cover and the second bearing are fixed in the axial direction.

4. The fan of claim 3, wherein, One of the outer circumferential wall of the first bearing and the inner circumferential wall of the first connecting hole is provided with a first limiting protrusion, and the other is provided with a first limiting groove, the first limiting protrusion and the first limiting groove are inserted and matched in the radial direction of the first bearing. And / or, one of the outer circumferential wall of the second bearing and the inner circumferential wall of the second connecting hole is provided with a second limiting protrusion, and the other is provided with a second limiting groove, the second limiting protrusion and the second limiting groove are inserted and matched in the radial direction of the second bearing.

5. The fan of claim 3, wherein, The first connecting hole penetrates the first mesh cover along an axial direction of the first mesh cover, and the first mesh cover is provided with a decorative plate covering an open end of the first connecting hole.

6. The fan of claim 2, wherein, The first bearing and the second bearing are both configured to include an outer support ring connected to the corresponding first mesh cover or second mesh cover and an inner support body rotatably mounted in the outer support ring, and the connecting shaft is arranged in the inner support body.

7. The fan of claim 2, wherein, The connecting shaft includes a main body segment and a front shaft segment and a rear shaft segment connected to both ends of the main body segment, respectively, an outer diameter of the front shaft segment is smaller than an outer diameter of the main body segment, and an outer diameter of the rear shaft segment is smaller than or equal to the outer diameter of the main body segment. The first bearing is arranged outside the front shaft segment, the second bearing and the fan blade are both arranged outside the main body segment, and the rear shaft segment is connected to the driving member in a power manner.

8. The fan of claim 1, wherein, The connection between the bearing structure and the mesh cover structure is provided with a buffering structure. The bearing structure is detachably mounted in the mesh cover structure, and the buffering structure is configured as a buffering pad clamped between the bearing structure and the mesh cover structure.

9. The fan of claim 1, wherein, Further comprising: A pre-tightening structure connected to the connecting shaft and used for axially limiting the connecting shaft; The pre-tightening structure is configured as an elastic bearing component including a bearing part and an elastic part connected to each other, the bearing part is fixed in the axial direction in the fan head, the connecting shaft is rotatably supported in the fan head through the bearing part, and the elastic part applies an elastic force to the connecting shaft; Or, the pre-tightening structure is configured as a sleeve axially fixedly mounted in the fan head and arranged outside the connecting shaft and axially fixed to the connecting shaft.

10. The fan of claim 1, wherein, The connecting shaft is provided with a first coupling member, an output end of the driving member is provided with a second coupling member, and the driving member and the connecting shaft are connected in a power coupling manner through the first coupling member and the second coupling member.

11. The fan of claim 10, wherein, The first coupling member and the second coupling member are configured to be screwed in a circumferential direction of the motor base.

12. The fan of claim 1, wherein, The motor base and the fan head are detachably connected.

13. The fan of claim 1, wherein, Further comprising a base adapted to be supported on a placement surface, and the motor base is mounted on the base.

14. The fan of any one of claims 1-13, wherein, The fan head is independently detachable relative to the motor base as a whole.

15. The fan of any one of claims 1-13, wherein, The fan head is provided with an air outlet hole, the fan blade is configured as an axial flow fan blade, and the axial flow fan blade is adapted to drive air flow in the fan head to flow to the air outlet hole in an axial direction of the axial flow fan blade. The radial dimension of the fan head is greater than or equal to twice the radial dimension of the motor base at the position of the driving member; and / or the ratio of the radial dimension to the axial dimension of the fan head is greater than or equal to 1.

16. The fan of any one of claims 1-13, wherein, The fan head is adapted to be connected to the motor base in a first direction intersecting the vertical direction at an initial position. The fan head is arranged to swing up and / or down and / or left and / or right relative to the motor base from the initial position.

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