Fan

Abstract

To provide a fan capable of improving the operational stability, reducing noise by the operation, and improving use comfortableness for a user.SOLUTION: A fan head includes a mesh cover structure and a fan blade. The mesh cover structure includes a first mesh cover and a second mesh cover. The fan blade includes a connection shaft and a blade. The blade is positioned in a space formed by the first mesh cover and the second mesh cover, and is fitted outside the connection shaft. The two ends of the connection shaft are rotatably supported by the first mesh cover and the second mesh cover through a bearing structure respectively, and the connection shaft is connected dynamically to a driving member.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the field of domestic electrical appliances, in particular to fans. [Background technology]

[0002] With the improvement of people's living standards, the requirements for the comfort of using household electrical appliances are also getting higher and higher, and as an essential electrical appliance in daily life, the comfort of using fans is becoming an issue that people are paying more and more attention to. In actual use, the existing fans have a problem that the front clutch and the rear clutch of the fan are tightly connected when they are engaged, and the axis lines of the front clutch, the rear clutch and the connecting shaft are not aligned, which affects the running stability of the fan, generates noise during the operation of the fan, and reduces the user's comfort, so there is room for improvement. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art, and to this end, the present invention proposes a fan that can improve the operation stability of the fan, reduce the operation noise, and further improve the use comfort of the user. [Means for solving the problem]

[0004] According to an embodiment of the fan of the present invention, the fan includes: a motor base having a driving member provided therein; and a fan head including a mesh cover structure and a fan blade, the mesh cover structure including a first mesh cover and a second mesh cover, the fan blade including a connecting shaft and a blade, the blade being located in a space formed by the first mesh cover and the second mesh cover, and the blade being fitted outside the connecting shaft, both ends of the connecting shaft being rotatably supported by the first mesh cover and the second mesh cover respectively via bearing structures, and the connecting shaft being poweredly connected to the driving member.

[0005] According to the fan of the embodiment of the present invention, by installing bearing structures on both ends of the connecting shaft, the connecting shaft is rotatably supported by the first mesh cover and the second mesh cover of the fan head, and the axis of the connecting shaft can be self-adjusted, which improves the stability of the fan during operation, reduces the noise generated during operation of the fan, improves the user's comfort, provides better usage effect and wider range of application.

[0006] According to some embodiments of the fan of the present invention, the first mesh cover is removably connected to the second mesh cover, a front end of the connecting shaft is rotatably supported on the first mesh cover via a first bearing, and a rear end of the connecting shaft is rotatably supported on the second mesh cover via a second bearing.

[0007] According to some embodiments of the fan of the present invention, a first connection hole is provided in the first mesh cover, the first bearing is attached to the first connection hole, and the first mesh cover and the first bearing are fixed with their positions restricted along the axial direction, and / or a second connection hole is provided in the second mesh cover, the second bearing is attached to the second connection hole, and the second mesh cover and the second bearing are fixed with their positions restricted along the axial direction.

[0008] According to some embodiments of the fan of the present invention, a first position regulating protrusion is provided on one of the outer peripheral wall of the first bearing and the inner peripheral wall of the first connecting hole, and a first position regulating groove is provided on the other, and the first position regulating protrusion and the first position regulating groove are inserted along the radial direction of the first bearing, and / or a second position regulating protrusion is provided on one of the outer peripheral wall of the second bearing and the inner peripheral wall of the second connecting hole, and a second position regulating groove is provided on the other, and the second position regulating protrusion and the second position regulating groove are inserted along the radial direction of the second bearing.

[0009] According to some embodiments of the fan of the present invention, the first connection hole penetrates the first mesh cover along the axial direction, and a decorative plate is provided on the first mesh cover, and the decorative plate is provided to cover the open end of the first connection hole.

[0010] According to some embodiments of the fan of the present invention, the first bearing and the second bearing are both configured to include an outer support ring and an inner support, the outer support ring is connected to the corresponding first mesh cover or the corresponding second mesh cover, the inner support is rotatably mounted within the outer support ring, and the connecting shaft is drilled into the inner support.

[0011] According to some embodiments of the fan of the present invention, the connecting shaft includes a main body portion and a front shaft portion and a rear shaft portion respectively connected to both ends of the main body portion, the outer diameter of the front shaft portion being smaller than the outer diameter of the main body portion and the outer diameter of the rear shaft portion being equal to or smaller than the outer diameter of the main body portion, wherein the first bearing is fitted outside the front shaft portion, the second bearing and the blade are both fitted outside the main body portion, and the rear shaft portion is poweredly connected to the driving member.

[0012] According to some embodiments of the fan of the present invention, a buffer structure is provided at a connection portion between the bearing structure and the mesh cover structure, Here, the bearing structure is removably attached to the mesh cover structure, and the buffer structure is configured as a buffer pad interposed between the bearing structure and the mesh cover structure.

[0013] According to some embodiments of the present invention, the fan further includes a pretensioner structure coupled to the connecting shaft for restricting a position of the connecting shaft in an axial direction, Here, the pretensioner structure is configured as an elastic bearing member, the elastic bearing member including a bearing portion and an elastic portion which are connected together, the bearing portion being relatively fixed along an axial direction within the fan head, the connecting shaft being rotatably supported within the fan head by the bearing portion, and the elastic portion applying the elastic force to the connecting shaft, Alternatively, the pretensioner structure is configured as a sleeve, the sleeve being fixedly attached relatively to the fan head along the axial direction, and the sleeve being fitted outside the connection shaft and fixed relatively to the connection shaft along the axial direction.

[0014] According to some embodiments of the fan of the present invention, a first coupling member is provided on the connecting shaft and a second coupling member is provided on the output end of the driving member, and the driving member and the connecting shaft are adapted to be kinetically coupled and connected via the first coupling member and the second coupling member.

[0015] According to some embodiments of the fan of the present invention, the first coupling member and the second coupling member are configured to be screwed together along a circumferential direction of the motor base.

[0016] According to some embodiments of the fan of the present invention, a child lock member and a microswitch are provided on the motor base, the microswitch is used to control the power state of the driving member, and the child lock member is movably attached to the motor base and is used to trigger the microswitch.

[0017] According to some embodiments of the present invention, the child lock member includes a slide operating piece and a switch push plate connected together, the slide operating piece is located outside the motor base, the switch push plate and the microswitch are both provided within the motor base, a trigger spring is provided on the microswitch, and the switch push plate is adapted to abut against the trigger spring.

[0018] According to some embodiments of the fan of the present invention, a latch pin is provided on the motor base, the latch pin being movable radially along the motor base, and a latch portion is provided on the fan head, the latch pin being configured to latch engage with the latch portion when the motor base is connected to the fan head.

[0019] According to some embodiments of the fan of the present invention, the motor base and the fan head are removably connected.

[0020] According to some embodiments of the present invention, the fan further includes a base, the base adapted to be supported on a mounting surface, and the motor base attached to the base.

[0021] In some embodiments of the fan of the present invention, the entire fan head is independently removable from the motor base.

[0022] According to some embodiments of the fan of the present invention, the fan head is provided with air outlet holes, and the fan blades are configured as axial fan blades, the axial fan blades being suitable for driving an air flow in the fan head to flow along an axial direction of the axial fan blade to the air outlet holes, And / or the radial dimension of the fan head is at least twice the radial dimension of the motor base at the position where the drive member is located, and / or the ratio of the radial dimension to the axial dimension of the fan head is at least 1.

[0023] According to some embodiments of the present invention, the fan head is adapted to be coupled to the motor base along a first direction intersecting a vertical direction in an initial position, The fan head is rotatably mounted on the motor base from the initial position to be vertically and / or horizontally rotatable. Effect of the Invention

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following detailed description of the embodiments taken in conjunction with the drawings. [Brief description of the drawings]

[0026] [Figure 1] 1 is a cross-sectional view of a fan head according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded view of a fan head according to an embodiment of the present invention. [Diagram 3] 1 is an exploded view of a base and a motor base according to an embodiment of the present invention. FIG. [Figure 4] 2 is an exploded view 2 of a base and a motor base according to an embodiment of the present invention. [Diagram 5] FIG. 2 is a schematic structural diagram of a fan according to an embodiment of the present invention. [Figure 6] FIG. 2 is a cross-sectional view of a fan head according to an embodiment of the present invention. [Figure 7] FIG. 2 is a cross-sectional view of a fan according to an embodiment of the present invention. [Figure 8] 1 is a schematic structural diagram of an elastic bearing member according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals throughout represent the same or similar elements, or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are used only to interpret the present invention, and should not be understood as limiting the present invention.

[0028] In describing the present invention, it is understood that the orientations and positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations and positional relationships shown in the drawings, and are merely for the convenience of describing and simplifying the description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and should not be understood as limiting the present invention. Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In describing the present invention, "plurality" means two or more, unless otherwise specified.

[0029] In the description of the present invention, unless otherwise specified or limited, the terms "attached", "coupled" and "connected" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a mechanical connection or an electrical connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between both elements. Those skilled in the art will be able to understand the specific meaning of the above terms in the present invention in a specific situation.

[0030] Hereinafter, a fan 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. The fan 100 can improve the operation stability, reduce the operation noise, and improve the user's comfort.

[0031] As shown in FIGS. 1 to 5, a fan 100 according to an embodiment of the present invention includes a motor base 2 and a fan head 3.

[0032] A driving member is provided in the motor base 2, and the fan head 3 includes a mesh cover structure and a fan blade, the mesh cover structure includes a first mesh cover 31 and a second mesh cover 32, the fan blade includes a connecting shaft 33 and a blade 36, the blade 36 is located in the space formed by the first mesh cover 31 and the second mesh cover 32, and the blade 36 is fitted outside the connecting shaft 33, both ends of the connecting shaft 33 are rotatably supported by the first mesh cover 31 and the second mesh cover 32 respectively via bearing structures, and the connecting shaft 33 is dynamically connected to the driving member.

[0033] Here, the motor base 2 is attached to the base 1 and to the upper end of the base 1, thereby realizing the attachment between the motor base 2 and the base 1, and the fan head 3 is attached to the motor base 2, thereby completing the attachment between the fan head 3 and the motor base 2, and further realizing the connection and fixation between the base 1, the motor base 2 and the fan 100. In this embodiment, the lower end of the base 1 is installed in a disk shape with a large radius, which makes the fan 100 more stable when in use and less likely to shake or fall over.

[0034] Specifically, the fan 100 is provided with a motor base 2, which can be installed in a cylindrical shape, where a driving member is provided in the motor base 2, which may be installed as a driving motor, which is installed on one side in the motor base 2 and can be used to output power to the outside, and the fan 100 is further provided with a fan head 3, which is detachably connected to the motor base 2, so that the fan head 3 can be removed for cleaning, ensuring that the fan 100 blows out clean air.

[0035] A mesh cover structure is installed on the fan head 3, the fan head 3 is detachably connected to the motor base 2 via the mesh cover structure, and fan blades are further installed on the fan head 3, the fan blades are installed in a space formed by the mesh cover structure, and the fan blades can be rotated by the power output from the driving member and generate a wind flow, a connecting shaft 33 and a blade 36 are installed on the fan blades, a first mesh cover 31 and a second mesh cover 32 are installed on the mesh cover structure, the blade 36 is installed in the space formed by the first mesh cover 31 and the second mesh cover 32, the blade 36 is fitted outside the connecting shaft 33, and the blade 36 is , fixedly connected to the connecting shaft 33 in the circumferential direction, one end of the connecting shaft 33 is connected to the driving member, and the other end is provided with a blade nut 42, so that the power output from the driving member can act on the connecting shaft 33, causing the connecting shaft 33 to rotate, and further moving and rotating the blades 36; two bearing structures are further mounted in the mesh cover structure, and the two bearing structures are respectively fitted onto both ends of the connecting shaft 33 to provide a supporting effect for the connecting shaft 33; the connecting shaft 33 is rotatably supported by the first mesh cover 31 and the second mesh cover 32 through the two bearing structures, so that the axis of the connecting shaft 33 can be self-adjusted, and the vibration generated when the connecting shaft 33 transmits power can be reduced, and the operation smoothness of the fan 100 can be improved.

[0036] In addition, 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 is working, the driving member outputs power to the connecting shaft 33, and the connecting shaft 33 rotates to move and rotate the blades 36, and further generate airflow. In the process of power transmission, the bearing structures at both ends of the connecting shaft 33 can provide supporting force for the connecting shaft 33. At the same time, when the driving member is output, the bearing structures at both ends of the connecting shaft 33 can adjust the axis of the connecting shaft 33, so that the power output from the driving member can be smoothly transmitted to the connecting shaft 33, which makes the operation of the fan 100 smoother. In addition, the fan head 3 is detachably connected to the mesh cover structure, which makes it easier and more convenient to install and remove the fan head 3.

[0037] In the fan 100 according to the embodiment of the present invention, by installing bearing structures on both ends of the connecting shaft 33, the connecting shaft 33 is rotatably supported by the first mesh cover 31 and the second mesh cover 32 of the fan head 3, and the axis of the connecting shaft 33 can be self-adjusted, which improves the stability of the fan 100 during operation, reduces the noise generated when the fan 100 is in operation, improves the user's comfort, provides better usage effect and has a wider range of application.

[0038] In some embodiments, the first mesh cover 31 is removably connected to the second mesh cover 32, and the front end of the connecting shaft 33 is rotatably supported on the first mesh cover 31 via a first bearing 34, and the rear end of the connecting shaft 33 is rotatably supported on the second mesh cover 32 via a second bearing 35.

[0039] Specifically, as shown in FIG. 1 and FIG. 2, a first mesh cover 31 and a second mesh cover 32 are installed in the mesh cover structure, the first mesh cover 31 and the second mesh cover 32 are respectively attached to both ends of the fan head 3, the second mesh cover 32 is attached to the side of the fan head 3 close to the motor base 2, the first mesh cover 31 is attached to the side of the fan head 3 away from the motor base 2, the first mesh cover 31 and the second mesh cover 32 are detachably connected, and the fan blades and the connecting shaft 33 are connected to the first mesh cover 31 and the second mesh cover 32. 2, a first bearing 34 is provided at one end of the connecting shaft 33 and a second bearing 35 is provided at the other end of the connecting shaft 33, the first bearing 34 is provided at one end of the connecting shaft 33 away from the driving member, i.e., the first bearing 34 is provided at the first mesh cover 31, and the second bearing 35 is provided at one end of the connecting shaft 33 close to the driving member, i.e., the second bearing 35 is provided at the second mesh cover 32, so that the front end of the connecting shaft 33 is rotatably supported by the first mesh cover 31 via the first bearing 34, and the rear end of the connecting shaft 33 is rotatably supported by the second mesh cover 32 via the second bearing 35.

[0040] In addition, the first mesh cover 31 is configured as a flattened disk structure, and the second mesh cover 32 is configured as an arc-shaped bowl structure, thereby forming an internal space in which the fan blades can rotate. The edge of the second mesh cover 32 is a mesh structure formed by a number of wires, which can ensure that as much of the airflow generated when the fan blades rotate is passed through the air outlets formed in the first mesh cover 31 as possible, thereby improving the efficiency of the fan 100. Furthermore, the installation of the first mesh cover 31 and the second mesh cover 32 can prevent personal injury or short circuit caused by interference with the human body or other objects. That is, the first mesh cover 31 and the second mesh cover 32 play the role of preventing foreign objects from coming into contact with the internal structure of the fan 100.

[0041] In some embodiments, the first mesh cover 31 is provided with a first connection hole 311, the first bearing 34 is attached to the first connection hole 311, and the first mesh cover 31 and the first bearing 34 are fixed in a position restricted along the axial direction; and / or the second mesh cover 32 is provided with a second connection hole 321, the second bearing 35 is attached to the second connection hole 321, and the second mesh cover 32 and the second bearing 35 are fixed in a position restricted along the axial direction, i.e., the first mesh cover 31 is provided with a first connection hole 311, the first bearing 34 is attached to the first connection hole 311, and the first mesh cover 31 and the first bearing 34 are fixed in a position restricted along the axial direction. At the same time, a second connection hole 321 is provided in the second mesh cover 32, the second bearing 35 is attached to the second connection hole 321, and the second mesh cover 32 and the second bearing 35 are fixed with their positions restricted along the axial direction, or a first connection hole 311 is provided only in the first mesh cover 31, the first bearing 34 is attached to the first connection hole 311, and the first mesh cover 31 and the first bearing 34 are fixed with their positions restricted along the axial direction, or a second connection hole 321 is provided only in the second mesh cover 32, the second bearing 35 is attached to the second connection hole 321, and the second mesh cover 32 and the second bearing 35 are fixed with their positions restricted along the axial direction.

[0042] Specifically, in this embodiment, as shown in FIG. 1, a first connection hole 311 is provided in the first mesh cover 31, and the radial size of the first connection hole 311 coincides with the radial size of the first bearing 34, whereby the first bearing 34 is attached to the first connection hole 311, and the first mesh cover 31 and the first bearing 34 are fixed in position along the axial direction, and further the axial movement of the first bearing 34 relative to the first mesh cover 31 is restricted. At the same time, a second connection hole 321 is provided in the second mesh cover 32, and the second connection hole 321 is fixed in the second mesh cover 32. The radial size of the hole 321 corresponds to the radial size of the second bearing 35, the second bearing 35 is attached to the second connecting hole 321, and the second mesh cover 32 and the second bearing 35 are fixed and positioned along the axial direction, thereby restricting the axial movement of the second bearing 35 relative to the second mesh cover 32, so that the first bearing 34 and the second bearing 35 are fixed to the housing, and the connecting shaft 33 is rotatably supported by the housing so that the first bearing 34 and the second bearing 35 can be adjusted in their own axial position, thereby ensuring the stability of the transmission.

[0043] In some embodiments, a first position regulating protrusion 312 is provided on one of the outer peripheral wall of the first bearing 34 and the inner peripheral wall of the first connecting hole 311, and a first position regulating groove 341 is provided on the other, and the first position regulating protrusion 312 and the first position regulating groove 341 are inserted along the radial direction of the first bearing 34, and / or a second position regulating protrusion 322 is provided on one of the outer peripheral wall of the second bearing 35 and the inner peripheral wall of the second connecting hole 321, and a second position regulating groove 351 is provided on the other, and the second position regulating protrusion 322 and the second position regulating groove 351 are inserted along the radial direction of the second bearing 35.

[0044] Specifically, a first position restricting protrusion 312 is provided on one of the outer peripheral wall of the first bearing 34 and the inner peripheral wall of the first connecting hole 311, and a first position restricting groove 341 is provided on the other, and the first position restricting protrusion 312 and the first position restricting groove 341 are inserted along the radial direction of the first bearing 34. At the same time, a second position restricting protrusion 322 is provided on one of the outer peripheral wall of the second bearing 35 and the inner peripheral wall of the second connecting hole 321, and a second position restricting groove 351 is provided on the other, and the second position restricting protrusion 322 and the second position restricting groove 351 are inserted along the radial direction of the second bearing 35. or a first position limiting protrusion 312 is provided only on one of the outer peripheral wall of the first bearing 34 and the inner peripheral wall of the first connecting hole 311, and a first position limiting groove 341 is provided on the other, and the first position limiting protrusion 312 and the first position limiting groove 341 are inserted along the radial direction of the first bearing 34; or a second position limiting protrusion 322 is provided only on one of the outer peripheral wall of the second bearing 35 and the inner peripheral wall of the second connecting hole 321, and a second position limiting groove 351 is provided on the other, and the second position limiting protrusion 322 and the second position limiting groove 351 are inserted along the radial direction of the second bearing 35.

[0045] Furthermore, in this embodiment, as shown in FIG. 1 , a first position restriction protrusion 312 is provided on one of the outer peripheral wall of the first bearing 34 and the inner peripheral wall of the first connecting hole 311, and a first position restriction groove 341 is provided on the other. That is, the first position restriction protrusion 312 may be disposed on the outer peripheral wall of the first bearing 34 or on the inner peripheral wall of the first connecting hole 311, and the first position restriction groove 341 may be disposed on the outer peripheral wall of the first bearing 34 or on the inner peripheral wall of the first connecting hole 311. When the first position restriction protrusion 312 is disposed on the outer peripheral wall of the first bearing 34, the first position restriction groove 341 may be disposed on the outer peripheral wall of the first bearing 34 or on the inner peripheral wall of the first connecting hole 311. The groove 341 is installed on the inner peripheral wall of the first connecting hole 311. Conversely, when the first position control protrusion 312 is installed on the inner peripheral wall of the first connecting hole 311, the first position control groove 341 is installed on the outer peripheral wall of the first bearing 34. In this embodiment, the first position control protrusion 312 is installed on the inner peripheral wall of the first connecting hole 311, the first position control groove 341 is installed on the outer peripheral wall of the first bearing 34, and the first position control protrusion 312 and the first position control groove 341 are inserted along the radial direction of the first bearing 34, thereby restricting the positions of the first mesh cover 31 and the first bearing 34 and fixing them along the axial direction.

[0046] At the same time, as shown in FIG. 1 , a second position restricting protrusion 322 is provided on one of the outer peripheral wall of the second bearing 35 and the inner peripheral wall of the second connecting hole 321, and a second position restricting groove 351 is provided on the other. That is, the second position restricting protrusion 322 may be disposed on the outer peripheral wall of the second bearing 35 or on the inner peripheral wall of the second connecting hole 321, the second position restricting groove 351 may be disposed on the outer peripheral wall of the second bearing 35 or on the inner peripheral wall of the second connecting hole 321, and when the second position restricting protrusion 322 is disposed on the outer peripheral wall of the second bearing 35, the second position restricting groove 351 is installed on the inner peripheral wall of the second connecting hole 321, and conversely, when the second position control protrusion 322 is installed on the inner peripheral wall of the second connecting hole 321, the second position control groove 351 is installed on the outer peripheral wall of the second bearing 35. In this embodiment, the second position control protrusion 322 is installed on the inner peripheral wall of the second connecting hole 321, the second position control groove 351 is installed on the outer peripheral wall of the second bearing 35, the second position control protrusion 322 and the second position control groove 351 are inserted along the radial direction of the second bearing 35, and the second mesh cover 32 and the second bearing 35 are fixed and positioned along the axial direction.

[0047] In some embodiments, the first connection hole 311 penetrates the first mesh cover 31 along the axial direction, and a decorative plate 37 is provided on the first mesh cover 31, and the decorative plate 37 is provided to cover the open end of the first connection hole 311.

[0048] Specifically, as shown in FIG. 1 , the first connection hole 311 penetrates the first mesh cover 31 along the axial direction of the fan head 3, one end of the first connection hole 311 close to the motor base 2 engages with the first bearing 34 and supports the connection shaft 33, one end of the first connection hole 311 remote from the motor base 2 communicates with the outside, and a decorative plate 37 is provided on the side of the first mesh cover 31 remote from the second mesh cover 32, the decorative plate 37 is detachable from the first mesh cover 31, the decorative plate 37 covers the open end of the first connection hole 311, makes it easier to remove the fan head 3, protects the first connection hole 311, and improves the safety of use, while at the same time making the internal structure invisible from the front side of the fan 100, tidying up the overall structure of the fan 100, and ensuring the visual comfort of the user.

[0049] In some embodiments, both the first bearing 34 and the second bearing 35 are configured to include an outer support ring 381 and an inner support 382, ​​i.e., the first bearing 34 is provided with an outer support ring 381 and an inner support 382, ​​and the second bearing 35 is provided with an outer support ring 381 and an inner support 382.

[0050] Specifically, as shown in FIG. 1 , the outer support ring 381 is connected to the corresponding first mesh cover 31 or second mesh cover 32, i.e., the outer peripheral wall of the outer support ring 381 is connected to 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; the inner support 382 is rotatably mounted in the outer support ring 381, i.e., the inner peripheral wall of the outer support ring 381 is connected to the outer peripheral wall of the inner support 382; and the connecting shaft 33 is drilled in the inner support 382, ​​a connecting hole is provided in the inner support 382, ​​and the size of the connecting hole is consistent with the connecting shaft 33, so that the connecting shaft 33 is supported by the inner support 382, ​​and the inner support 382 is rotatably mounted in the outer support ring 381, i.e., the connecting shaft 33 is rotatably mounted in the outer support ring 381, which further makes the connecting shaft 33 rotatable relative to the housing, thereby transmitting power to the blades 36 through the connecting shaft 33.

[0051] In some embodiments, as shown in FIG. 1 , the connecting shaft 33 includes a main body portion 331, and a front shaft portion 332 and a rear shaft portion 333 respectively connected to both ends of the main body portion 331, wherein the outer diameter of the front shaft portion 332 is smaller than the outer diameter of the main body portion 331 and the outer diameter of the rear shaft portion 333 is equal to or smaller than the outer diameter of the main body portion 331; the front shaft portion 332 is installed on the connecting shaft 33, and the front shaft portion 332 is installed at one end of the connecting shaft 33 away from the motor base 2; the rear shaft portion 333 is installed on the connecting shaft 33, and the rear shaft portion 333 is installed at one end of the connecting shaft 33 close to the motor base 2; the main body portion 331 is installed between the front shaft portion 332 and the rear shaft portion 333, and the outer diameter of the front shaft portion 332 is smaller than the outer diameter of the main body portion 331 and the outer diameter of the rear shaft portion 333 is equal to or smaller than the outer diameter of the main body portion 331.

[0052] Here, the first bearing 34 is fitted outside the front shaft portion 332, the second bearing 35 and the blade 36 are both fitted outside the main body portion 331, the rear shaft portion 333 is dynamically connected to the driving member, the first bearing 34 is fitted outside the front shaft portion 332, the radial dimension of the connection hole of the inner support 382 of the first bearing 34 matches the radial dimension of the front shaft portion 332, and the outer diameter of the front shaft portion 332 is smaller than the outer diameter of the main body portion 331, thereby limiting the axial displacement of the connecting shaft 33, the blade 36 is fitted outside the main body portion 331, and when the fan 100 is in operation, the rotation of the blade 36 can generate a wind flow, and at the same time, the blade 36 is subjected to a counteracting force caused by the wind flow, and the acting force is transmitted along the blade 36 to the connecting shaft 33, and the outer diameter dimension of the blade 36 installed on the main body portion 331 is large, which can improve the structural strength of the main body portion 331, and avoid the connecting shaft 33 being bent due to the acting force being too large.

[0053] In some embodiments, a dampening structure is provided at the connection between the bearing structure and the mesh cover structure.

[0054] Specifically, a bearing structure is further attached to the mesh cover structure, and the bearing structure can provide a supporting effect for the connecting shaft 33, so that the connecting shaft 33 is rotatably supported on the mesh cover structure via the bearing structure; at the same time, a buffer structure is provided at the connection point between the bearing structure and the mesh cover structure, which can further reduce the vibration generated during power transmission of the connecting shaft 33 and improve the smoothness of the operation of the fan 100; during the power transmission process, the bearing structure can provide a supporting force for the connecting shaft 33, and at the same time, an acting force is applied to the bearing structure when the blades 36 rotate, and the acting force is transmitted to the buffer structure via the bearing structure, which further weakens the acting effect of the acting force on the fan head 3 and makes the operation of the fan 100 smoother.

[0055] Here, the bearing structure is removably attached to the mesh cover structure, and the buffer structure is configured as a buffer pad 43, which is interposed between the bearing structure and the mesh cover structure.

[0056] Furthermore, as shown in FIG. 6 , the bearing structure is installed between the mesh cover structure and the connecting shaft 33 and can be used to provide supporting force for the connecting shaft 33. The bearing structure requires regular maintenance during use, and the bearing structure is removably attached to the mesh cover structure, which can save maintenance time; when the bearing structure is damaged, only the bearing structure needs to be replaced, which saves costs.

[0057] At the same time, when the fan 100 is operating, as the blades 36 rotate, they exert an acting force on the connecting shaft 33 connected thereto, and this acting force is then transmitted to the bearing structure via the connecting shaft 33. By setting the bearing structure as an independent member, the conduction path is increased when the acting force is transmitted, further weakening the acting effect. In addition, a buffer structure is set up between the bearing structure and the housing, and the buffer structure can be set up as a buffer pad 43. When the acting force is transmitted to the housing via the bearing structure, it is buffered via the buffer pad 43, further weakening the acting effect of the acting force, and improving the smoothness of operation of the fan 100.

[0058] In some embodiments, the fan 100 further includes a pretensioner structure.

[0059] Specifically, as shown in FIG. 7 , the pretensioner structure is connected to the connecting shaft 33 and used to axially regulate the position of the connecting shaft 33, the pretensioner structure is connected to the end of the connecting shaft 33 and can be used to control the axial clearance of the connecting shaft 33, the pretensioner structure can have a dynamic clearance control function when the connecting shaft 33 rotates, and the connecting shaft 33 can have an appropriate clearance along the axial direction, thereby avoiding axial deviation during internal rotation of the fan 100 that affects the operating stability of the fan 100.

[0060] As a result, by installing a pretensioner structure at the output end of the connecting shaft 33, the axial clearance of the connecting shaft 33 can be controlled, which is beneficial for the smooth rotation of the output end of the connecting shaft 33, and can also facilitate the rotation of the fan blades, thereby avoiding the axial vibration and friction of the connecting shaft 33, thereby reducing noise, making the power transmission between the driving member and the connecting shaft 33 more efficient, enhancing the function of the fan 100, improving the service life of the product and the user experience, and having a simple structure and strong applicability.

[0061] Here, the pretensioner structure is configured as an elastic bearing member 44, which includes a bearing portion 441 and an elastic portion 442 connected together, the bearing portion 441 is relatively fixed along the axial direction within the fan head 3, the connecting shaft 33 is rotatably supported within the fan head 3 via the bearing portion 441, and the elastic portion 442 applies an elastic force to the connecting shaft 33.

[0062] 8, the elastic bearing member 44 includes two parts, one part is a bearing part 441 and the other part is an elastic part 442, the bearing part 441 can be connected to the elastic part 442 to form the elastic bearing member 44, wherein the bearing part 441 and the fan head 3 are fixed relatively along the axial direction, the fixing of the bearing part 441 can be realized, and the fixing of the elastic bearing member 44 can be realized, wherein the elastic bearing member 44 is configured as a circular ring, and the elastic bearing member 44 is coaxially connected to the connecting shaft 33, so that the connecting shaft 33 is rotatably supported inside the fan head 3, the connection of the connecting shaft 33 can be realized, and the connecting shaft 33 can rotate relative to the fan head 3, and the elastic part 442 can impart an elastic force to the connecting shaft 33, and is used to adjust the axial clearance of the connecting shaft 33.

[0063] When the axial gap of the connecting shaft 33 is too large, the elastic portion 442 of the pretensioner structure can release and absorb the excessive gap, and impart an elastic force to the connecting shaft 33 toward the driving member, thereby making the axial gap of the connecting shaft 33 smaller; when the axial gap of the connecting shaft 33 is small, the elastic portion 442 of the pretensioner structure can bear the compression of the connecting shaft 33, and release a certain axial gap in the connecting shaft 33, thereby making the axial gap of the connecting shaft 33 larger, thereby avoiding the connecting shaft 33 from rotating smoothly due to the axial gap being too small; in this way, the axial gap of the connecting shaft 33 can be comprehensively adjusted by the elastic portion 442, and ensures that the axial gap of the connecting shaft 33 is more stable.

[0064] As a result, by installing the elastic bearing member 44 as described above, it is possible to simultaneously achieve connection between the elastic bearing member 44 and the connecting shaft 33 and adjustment of the axial gap of the connecting shaft 33, and it is also possible to achieve dynamic control of the axial gap of the connecting shaft 33, so that the connecting shaft 33 has an appropriate gap along the axial direction, thereby improving the operating stability of the fan 100.

[0065] Alternatively, the pretensioner structure is configured as a sleeve, the sleeve is fixedly attached relatively to the fan head 3 along the axial direction, and the sleeve is fitted outside the connecting shaft 33 and fixed relatively to the connecting shaft 33 along the axial direction.

[0066] In addition, the pretensioner structure can be configured as a sleeve, which is axially installed inside the fan head 3, and is installed adjacent to the end of the output end of the connecting shaft 33. In an actual design, the sleeve can be configured as a ring, which is fitted onto the outside of the connecting shaft 33, and both ends of the sleeve can be axially regulated and fixed to realize the installation and fixing of the sleeve. Here, the sleeve has two forms, one is configured as rigid, which can ensure that the axial clearance of the connecting shaft 33 is a fixed value during the operation of the connecting shaft 33, and can meet the axial clearance requirement of the connecting shaft 33; the other is configured as elastic, which can make the sleeve compressible, which can ensure that the axial clearance of the connecting shaft 33 is controlled within a certain range during the operation of the connecting shaft 33, and can realize dynamic control of the axial clearance of the connecting shaft 33, and can meet the axial clearance requirement of the connecting shaft 33.

[0067] In this way, the pretensioner structure is installed as a sleeve, which has a simple structure and low manufacturing costs; at the same time, there are two options for the sleeve material, rigid and elastic, which allows for flexible selection of the pretensioner structure, and the axial clearance of the connecting shaft 33 meets all the requirements, making the operation of the connecting shaft 33 smooth.

[0068] In some embodiments, a first coupling member 39 is provided on the connecting shaft 33 and a second coupling member 21 is provided on the output end of the drive member, and the drive member and the connecting shaft 33 are kinetically coupled and connected via the first coupling member 39 and the second coupling member 21.

[0069] Specifically, as shown in FIG. 1 to FIG. 4, a motor base 2 is installed on the fan 100, the motor base 2 is used to mount a driving member, and the driving member can output power to the outside. A second coupling member 21 is provided at the output end of the driving member, and the second coupling member 21 is connected to the driving member by a locking screw 22, and the side of the locking screw 22 close to the fan head 3 is closed by a screw cover plate 23, so that the second coupling member 21 is removable and can improve safety. A gasket 41 is installed on the locking screw 22 to increase the pressure-receiving area and ensure the connection reliability. A fan head 3 is further installed on the fan 100, and fan blades are installed in the fan head 3, and the fan blades are rotatably mounted in the housing of the fan head 3, and the fan blades are provided with a blade. a second coupling member 21 is operatively coupled to the first coupling member 39, and the second coupling member 21 is connected to the first coupling member 39 through a connecting shaft 33; a first coupling member 39 is installed on the fan head 3, the first coupling member 39 is installed on the side of the fan head 3 close to the motor base 2, and the side of the first coupling member 39 close to the fan head 3 is connected to the fan blades installed inside the fan head 3; a gasket 41 is installed between the first coupling member 39 and the connecting shaft to increase the pressure-receiving area and ensure the connection reliability; a second coupling member 21 is operatively coupled to the first coupling member 39, and the power output from the driving member is used to rotate the fan blades to generate airflow; the power output from the driving member is 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.

[0070] Furthermore, when the fan 100 is operating, the driving member in the motor base 2 outputs power, and the second coupling member 21 is connected to the output end of the driving member close to the fan head 3, so that the power output from the driving member can be output by the second coupling member 21, and the second coupling member 21 is kinetically coupled and connected to the first coupling member 39, which is connected to the fan blades, so that the first coupling member 39 can move and rotate the fan blades, further generating airflow and realizing the normal operation of the fan 100.

[0071] In some embodiments, the first coupling member 39 and the second coupling member 21 are configured to be screwed together along the circumferential direction of the motor base 2 .

[0072] Specifically, when the fan 100 is in operation, the driving member installed inside the motor base 2 outputs power, which is then output to the first coupling member 39 via the second coupling member 21, to rotate the fan blades, which generate airflow as they rotate. While generating airflow, the airflow can apply a counteracting force to the fan blades, which can be transmitted to the second coupling member 21 by the fan blades. The first coupling member 39 and the second coupling member 21 are installed to be screwed together in the circumferential direction of the motor base 2, and the connection between the first coupling member 39 and the second coupling member 21 is made tighter due to the force, which ensures the reliability of power transmission and improves the operating stability of the fan 100.

[0073] In some embodiments, the motor base 2 is provided with a child lock member and a microswitch 24, the microswitch 24 is used to control the power state of the drive member, and the child lock member is movably mounted on the motor base 2 and is used to trigger the microswitch 24.

[0074] Specifically, as shown in FIG. 3, a child lock member and a microswitch 24 are installed at the upper end of the motor base 2 close to the fan head 3, the child lock member is configured as a long cover-like structure extending circumferentially around the connection point, the child lock member is movably attached to the motor base 2 and is used to trigger the microswitch 24, the microswitch 24 is used to control the power state of the driving member, the driving member is activated after the child lock member triggers the microswitch 24, the driving member stops operating after the child lock member separates from the microswitch 24, and the operation of the driving member can be stopped after the fan head 3 is removed, thereby improving safety in use.

[0075] In some embodiments, the child lock member includes a connected slide operating piece 25 and a switch push plate 26, the slide operating piece 25 is located outside the motor base 2, the switch push plate 26 and the microswitch 24 are both provided within the motor base 2, a trigger spring is provided on the microswitch 24, and the switch push plate 26 is adapted to abut against the trigger spring.

[0076] Specifically, as shown in FIG. 3, a slide operation piece 25 and a switch push plate 26 are installed on the child lock member, the slide operation piece 25 is installed and connected to the switch push plate 26, and the slide operation piece 25 is installed outside the motor base 2, making it easy for the user to operate it; the switch push plate 26 and the microswitch 24 are installed inside the motor base 2, and when the user moves the slide operation piece 25, the switch push plate 26 and the microswitch 24 can be operated; a trigger spring is installed on the microswitch 24, and the switch push plate 26 can abut against the trigger spring; after the user closes the slide operation piece 25, the microswitch 24 abuts against the trigger spring, further operating the driving member, thereby improving the safety of use.

[0077] In some embodiments, a latch pin 27 is provided on the motor base 2, the latch pin 27 is movable along the radial direction of the motor base 2, and a latch portion is provided on the fan head 3, and the latch pin 27 is arranged to latch into the latch portion when the motor base 2 is connected to the fan head 3.

[0078] Specifically, as shown in FIG. 3, a latch pin 27 is installed on the motor base 2, the latch pin 27 is movable along the radial direction of the motor base 2, and a latch portion is provided on the fan head 3, the latch pin 27 is installed to latch into the latch portion when the motor base 2 is connected to the fan head 3, when the latch pin 27 is not engaged with the latch portion, the fan head 3 is movable relative to the motor base 2, when the latch pin 27 is engaged with the latch portion, it limits the displacement of the fan head 3 relative to the motor base 2, thus playing the role of regulating the latch position, further ensuring the reliability of the engagement between the fan head 3 and the motor base 2, and preventing the fan head 3 from detaching from the motor base 2 during use, thereby improving the safety of use.

[0079] In some embodiments, the motor base 2 and the fan head 3 are removably connected.

[0080] Specifically, a first connection part is provided on the side of the fan head 3 close to the motor base 2, and a second connection part is provided on the side of the motor base 2 close to the fan head 3, the first connection part and the second connection part are connected by a method such as insertion, and after the first connection part is inserted and connected to the second connection part, the latch pin 27 is inserted into the latch jack to further fix the fan head 3 to the motor base 2, and after the latch pin 27 is removed from the latch jack, the fan head 3 is separated from the motor base 2, thereby realizing the installation and removal of the fan head 3 to the motor base 2. Such a removal method of the fan head 3 is simple and easy, and makes it easy to remove and clean the fan head 3. The fan head 3 can be removed and cleaned, which ensures that the fan 100 blows clean air and improves the user's experience.

[0081] In some embodiments, the fan 100 further includes a base 1 , the base 1 adapted to be supported on a mounting surface, and the motor base 2 attached to the base 1 .

[0082] Specifically, as shown in FIG. 5, the base 1 is located at the bottom of the fan 100, and the height of the base 1 is high. The motor base 2 is attached to the upper end of the base 1, which can realize the connection between the motor base 2 and the base 1. The base 1 is used to support the motor base 2 and the fan head 3. In the operating and non-operating states of the fan 100, the base 1 is supported on the mounting surface, which can make the mounting of the fan 100 more stable in both cases. The base 1 supports the fan 100 on the mounting surface, that is, the fan 100 can be placed on the floor. Such a floor-mounted fan is advantageous for the overall stable mounting of the fan 100. In actual use, the fan 100 can be installed as a tabletop type or a wall-mounted type, etc., and the length of the rod installed on the base 1 of the fan 100 can be selected according to actual use. When the fan 100 is installed on a tabletop type, the length of the rod installed on the base 1 is short. When the fan 100 is installed on a wall-mounted type, the rod-shaped structure of the base 1 can be omitted.

[0083] In some embodiments, the entire fan head 3 is independently detachable from the motor base 2, such that the fan head 3 can be completely independently detached from the motor base 2; in this way, when a user cleans the fan 100, the fan head 3 can be independently cleaned, which is not only advantageous for improving the cleaning efficiency, but also convenient for the user to increase the cleaning frequency, ensuring that the fan 100 can always blow out fresh and clean air, and improving the user experience.

[0084] Here, in actual design, the fan head 3 and its internal structural components such as the fan blades can be integrated, and at the same time, the motor base 2 and its internal structural components such as the motor can be integrated. When the fan head 3 and the motor base 2 are removed and installed as a whole, the mesh cover structure of the fan head 3 and the housing of the motor base 2 can be directly removed or connected, the removal structure is simple, the connection relationship is not complicated, and the time required to remove the fan head 3 from the motor base 2 is greatly reduced. At the same time, after the fan head 3 is removed from the motor base 2 as an independent entity, the user can wash the entire fan head 3, and the internal structural components of the fan head 3 can also be removed and washed, so as to meet the cleaning needs of the user.

[0085] 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, which is suitable for driving the airflow in the fan head 3 to flow to the air outlet hole along the axial direction of the axial fan blade. That is, unlike the conventional centrifugal fan blade, the fan blade of the fan 100 in the present invention can realize axial intake and axial exhaust, where, during actual operation, the axial fan blade rotates, and drives the airflow behind the axial fan blade to flow forward along its axial direction, and the air outlet hole flowing at the front of the fan head 3 is transported toward the user's face.

[0086] Here, it is noted that an air intake hole can be provided on the fan head 3, and the air intake hole can be provided on the rear side of the fan head 3 and can intake air in the axial direction, or can be provided on the circumferential outer side of the fan head 3 and can intake air obliquely. Either can achieve the intake function of the fan head 3, but the air flow entering the fan head 3 flows to the axial rear end of the axial fan blade, and then flows forward along the axial direction to the air outlet hole under the action of the axial fan blade. In particular, an air intake hole is provided on the rear side of the fan head 3, and at the same time, a heat dissipation flow path is provided in the motor base 2, so that the heat dissipation flow path is connected to the air intake hole, and further, under the driving action of the axial fan blade, the air flow dissipates heat from the driving components etc. during the heat dissipation flow, and then flows to the user from the air intake hole. This is not only advantageous for blowing air, but also realizes internal heat dissipation in the motor base 2.

[0087] Moreover, the radial dimension of the fan head 3 is at least twice the radial dimension of the motor base 2 at the position where the driving member is located, and / or the ratio of the radial dimension to the axial dimension of the fan head 3 is at least 1. Thus, the fan 100 of the present invention is different from a conventional cross-flow wind turbine, in that a conventional tower fan uses a cross-flow wind turbine, and the radial dimension of a tower fan does not change significantly at various positions in the axial direction, whereas the radial dimension of the fan head 3 of the present invention is much larger than the radial dimension of the motor base 2 at the driving member.

[0088] At the same time, the installation of axial fan blades is advantageous in that the fan head 3 and the motor base 2 are mounted more stably than the centrifugal fan blades, and ensures the stability of the position state of the fan 100 .

[0089] In some embodiments, the fan head 3 is adapted to be coupled to the motor base 2 in the initial position along a first direction intersecting 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 is moved along the first direction relative to the motor base 2, and the fan head 3 and the motor base 2 are connected and fixed, for example, if the first direction is along the horizontal direction, the fan head 3 is attached to the front end of the motor base 2 from front to back along the horizontal direction, to realize the connection and fixation of the two along the horizontal direction.

[0090] Here, the first direction can also form a certain inclination angle with respect to the horizontal direction, and both intersect with the vertical direction, i.e., the first direction can be inclined upward or downward with respect to the horizontal direction, which makes the installation of the fan head 3 more flexible.

[0091] The fan head 3 is also installed so that it can swing up and down and / or left and right from its initial position relative to the motor base 2; that is, after the fan head 3 is connected and fixed to the motor base 2, the user can adjust the angle at which the fan head 3 is positioned. For example, when the fan head 3 and the motor base 2 are both attached to the base 1, the fan head 3 can be driven to adjust in different directions, such as up, down, left and right, relative to the base 1, and the fan head 3 can be adjusted so that its axis is parallel to the vertical direction, thereby making the adjustment range of the fan head 3 larger and meeting the user's air blowing needs in more directions.

[0092] In the description herein, references to "one embodiment," "some embodiments," "exemplary embodiments," "examples," "embodiments," or "some examples" mean that the particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. Exemplary descriptions of the terms mentioned above in the description herein do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0093] While embodiments of the present invention have been shown and described, those skilled in the art will appreciate that these embodiments are capable of various changes, modifications, substitutions, and alterations without departing from the principles and scope of the present invention, and the scope of the present invention is defined by the claims and their equivalents. [Explanation of symbols]

[0094] Fan 100, Base 1, motor base 2, second coupling member 21, locking screw 22, screw cover plate 23, micro switch 24, slide operation piece 25, switch push plate 26, latch pin 27, Fan head 3, first mesh cover 31, first connecting hole 311, first position control protrusion 312, second mesh cover 32, second connecting hole 321, second position control protrusion 322, connecting shaft 33, main body portion 331, front shaft portion 332, rear shaft portion 333, first bearing 34, first position control groove 341, second bearing 35, second position control groove 351, blade 36, decorative plate 37, outer support ring 381, inner support 382, ​​first coupling member 39, gasket 41, blade nut 42, buffer pad 43, elastic bearing member 44, bearing portion 441, elastic portion 442.

Claims

1. Being a fan, A motor base having a drive member provided therein; a fan head including a mesh cover structure and a fan blade, wherein the mesh cover structure includes a first mesh cover and a second mesh cover, the fan blade includes a connecting shaft and a blade, the blade is located in a space formed by the first mesh cover and the second mesh cover and the blade is fitted outside the connecting shaft, both ends of the connecting shaft are rotatably supported by the first mesh cover and the second mesh cover respectively via bearing structures, and the connecting shaft is powerably connected to the driving member.

2. 2. The fan of claim 1, wherein the first mesh cover is removably connected to the second mesh cover, a front end of the connecting shaft is rotatably supported by the first mesh cover via a first bearing, and a rear end of the connecting shaft is rotatably supported by the second mesh cover via a second bearing.

3. a first connection hole is provided in the first mesh cover, the first bearing is attached to the first connection hole, and the first mesh cover and the first bearing are fixed to be positionally restricted along an axial direction; And / or the fan described in claim 2, characterized in that a second connection hole is provided in the second mesh cover, the second bearing is attached to the second connection hole, and the second mesh cover and the second bearing are fixed with their positions restricted along the axial direction.

4. a first position restricting protrusion is provided on one of an outer peripheral wall of the first bearing and an inner peripheral wall of the first connection hole, and a first position restricting groove is provided on the other of the outer peripheral wall of the first bearing and the inner peripheral wall of the first connection hole, the first position restricting protrusion and the first position restricting groove are inserted along a radial direction of the first bearing, and / or a second position regulating protrusion is provided on one of an outer peripheral wall of the second bearing and an inner peripheral wall of the second connection hole, and a second position regulating groove is provided on the other, and the second position regulating protrusion and the second position regulating groove are inserted along the radial direction of the second bearing.

5. 4. The fan described in claim 3, characterized in that the first connection hole penetrates the first mesh cover along an axial direction, and a decorative plate is provided on the first mesh cover, and the decorative plate is provided to cover an open end of the first connection hole.

6. 3. The fan of claim 2, wherein the first bearing and the second bearing are each configured to include an outer support ring and an inner support, the outer support ring is connected to the corresponding first mesh cover or the corresponding second mesh cover, the inner support is rotatably mounted within the outer support ring, and the connecting shaft is drilled into the inner support.

7. the connecting shaft includes a main body portion, and a front shaft portion and a rear shaft portion respectively connected to both ends of the main body portion, the outer diameter of the front shaft portion being smaller than the outer diameter of the main body portion, and the outer diameter of the rear shaft portion being equal to or smaller than the outer diameter of the main body portion, 3. The fan according to claim 2, wherein the first bearing is fitted outside the front shaft portion, the second bearing and the blade are both fitted outside the main body portion, and the rear shaft portion is poweredly connected to the drive member.

8. a buffer structure is provided at a connection portion between the bearing structure and the mesh cover structure, 2. The fan according to claim 1, wherein the bearing structure is removably attached to the mesh cover structure, and the buffer structure is configured as a buffer pad interposed between the bearing structure and the mesh cover structure.

9. a pretensioner structure coupled to the connecting shaft for axially restricting a position of the connecting shaft, the pretensioner structure is configured as an elastic bearing member, the elastic bearing member including a bearing portion and an elastic portion which are connected together, the bearing portion being relatively fixed along an axial direction within the fan head, the connecting shaft being rotatably supported within the fan head by the bearing portion, and the elastic portion applying an elastic force to the connecting shaft, Alternatively, the pretensioner structure is configured as a sleeve, the sleeve is fixedly attached relatively to the fan head along the axial direction, and the sleeve is fitted outside the connection shaft and fixed relatively to the connection shaft along the axial direction.

10. 2. The fan according to claim 1, wherein a first coupling member is provided on the connecting shaft and a second coupling member is provided on an output end of the driving member, the driving member and the connecting shaft being adapted to be operatively coupled and connected via the first coupling member and the second coupling member.

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

12. 2. The fan of claim 1, wherein the motor base is provided with a child lock member and a microswitch, the microswitch is used to control the power state of the driving member, and the child lock member is movably attached to the motor base and is used to trigger the microswitch.

13. The fan described in claim 12, characterized in that the child lock member includes a connected slide operating piece and a switch push plate, the slide operating piece is located outside the motor base, the switch push plate and the microswitch are both provided within the motor base, a trigger spring is provided on the microswitch, and the switch push plate is suitable for abutting against the trigger spring.

14. 2. The fan of claim 1, wherein the motor base is provided with a latch pin, the latch pin being movable along a radial direction of the motor base, and the fan head is provided with a latch portion, the latch pin being configured to latch engage with the latch portion when the motor base is connected to the fan head.

15. The fan of claim 1 , wherein the motor base and the fan head are removably coupled.

16. The fan of claim 1 , further comprising a base, the base adapted to be supported on a mounting surface, the motor base being attached to the base.

17. A fan as claimed in any preceding claim, wherein the entire fan head is independently detachable from the motor base.

18. the fan head is provided with an air outlet hole, the fan blade being configured as an axial fan blade, the axial fan blade being suitable for driving an air flow in the fan head to flow along an axial direction of the axial fan blade to the air outlet hole; A fan as described in any one of the preceding claims, characterized in that the radial dimension of the fan head is at least twice the radial dimension of the motor base at the position where the driving member is located, and / or the ratio of the radial dimension to the axial dimension of the fan head is at least 1.

19. the fan head is adapted to be coupled to the motor base in an initial position along a first direction intersecting a vertical direction; The fan according to any one of claims 1 to 16, wherein the fan head is arranged to be swingable up and down and / or left and right from the initial position relative to the motor base.

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