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, and in particular to fans. [Background technology]

[0002] As people's living standards improve, the demands for the comfort of using household electrical appliances are also increasing, and as fans are an essential electrical appliance in daily life, their comfort has become an issue of increasing concern. In actual use, existing fans have a problem in that the front clutch and rear clutch of the fan are tightly connected when engaged, so the axes of the front clutch, rear clutch and connecting shaft are not aligned, which further affects the operating stability of the fan, generates noise during operation, and reduces the comfort of use for users, 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 by providing a fan that can improve the operational stability of the fan, reduce operational noise, and further improve user comfort. [Means for solving the problem]

[0004] According to an embodiment of the present invention, the fan includes: a motor base having a driving member disposed therein; and a fan head including a mesh cover structure and fan blades, the mesh cover structure including a first mesh cover and a second mesh cover, the fan blades including a connecting shaft and blades, the blades being located in a space formed by the first mesh cover and the second mesh cover and fitted onto 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 power-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, and further improves user comfort, resulting in better usage effects and a wider range of applications.

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

[0008] According to some embodiments of the fan of the present invention, a first position restriction 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 restriction groove is provided on the other, and the first position restriction protrusion and the first position restriction groove are inserted along the radial direction of the first bearing, and / or a second position restriction 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 restriction groove is provided on the other, and the second position restriction protrusion and the second position restriction 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 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 power-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 point 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 connected to the connecting shaft for axially restricting the position of the connecting shaft, wherein the pretensioner structure is configured as an elastic bearing member, the elastic bearing member including a bearing portion and an elastic portion 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 may be configured as a sleeve, the sleeve being fixedly attached within the fan head along the axial direction, and the sleeve being fitted outside the connecting shaft and fixedly attached to the connecting 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 operatively 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 threadedly engaged with each other along the circumferential direction of the motor base.

[0016] According to some embodiments of the fan of the present invention, 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.

[0017] In some embodiments of the fan 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 arranged 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 is movable along the radial direction of the motor base, and a latch portion is provided on the fan head, and the latch pin is configured to latch into 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 adapted to be supported on a mounting surface, and the motor base is attached to the base.

[0021] According to some embodiments 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 an air outlet hole, and the fan blade is configured as an axial fan blade, and the axial fan blade is suitable for driving airflow in the fan head to flow to the air outlet hole along an axial direction of the axial fan blade; 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 in an initial position along a first direction intersecting a vertical direction; The fan head is rotatable from the initial position relative to the motor base in a vertical and / or horizontal direction. [Effects of the Invention]

[0024] Additional aspects and advantages of the invention will be set forth in part in the description that 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 readily understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

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

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, and 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 terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, used in the present description, are based on the orientations and positions shown in the drawings and are intended solely for the convenience of describing and simplifying the present invention. They do not indicate or imply that the designated devices or elements must have a particular orientation, be configured, or operate in a particular orientation, and should not be construed 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, 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 meanings of the above terms in the present invention in specific situations.

[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 operational stability, reduce operational noise, and further improve user 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 fan blades. The mesh cover structure includes a first mesh cover 31 and a second mesh cover 32. The fan blades include a connecting shaft 33 and blades 36. The blades 36 are located in the space formed by the first mesh cover 31 and the second mesh cover 32 and are fitted onto the outside of 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 power-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 tip over.

[0034] Specifically, the fan 100 is provided with a motor base 2, which can be installed cylindrically, and a driving member is provided within the motor base 2, which may be installed as a driving motor. The driving member is installed on one side within the motor base 2 and can be used to output power to the outside. 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 and cleaned, 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 further generate a wind flow, a connecting shaft 33 and blades 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 blades 36 are installed in a space formed by the first mesh cover 31 and the second mesh cover 32, the blades 36 are fitted outside the connecting shaft 33, and the blades 36 are , which 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 equipped 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 installed within the mesh cover structure, which are fitted respectively on both ends of the connecting shaft 33 to provide support for the connecting shaft 33, so that the connecting shaft 33 is rotatably supported by the first mesh cover 31 and the second mesh cover 32 through the two bearing structures, which further allows the axis of the connecting shaft 33 to self-adjust, which reduces the vibration generated when the connecting shaft 33 transmits power, and improves the smoothness of the operation of the fan 100.

[0036] Furthermore, the base 1 is located at the bottom, the motor base 2 is located at the top 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 operating, the driving member outputs power to the connecting shaft 33, and the connecting shaft 33 rotates to move and rotate the blades 36, thereby generating airflow. During the power transmission process, the bearing structures on both ends of the connecting shaft 33 can provide support for the connecting shaft 33. At the same time, when the driving member is outputting, the bearing structures on 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, further improving the operation of the fan 100. Furthermore, the fan head 3 is detachably connected to the mesh cover structure, making 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, bearing structures are installed on both ends of the connecting shaft 33, so that 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 during operation of the fan 100, and further improves user comfort, resulting in better usability and a wider range of applications.

[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 FIGS. 1 and 2, the mesh cover structure includes a first mesh cover 31 and a second mesh cover 32, 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 closer to the motor base 2, the first mesh cover 31 is attached to the side of the fan head 3 farther from the motor base 2, and the first mesh cover 31 and the second mesh cover 32 are detachably connected, and the fan blades and the connecting shaft 33 are attached to the first mesh cover 31 and the second mesh cover 3 2, a first bearing 34 is installed at one end of the connecting shaft 33, and a second bearing 35 is installed at the other end of the connecting shaft 33, the first bearing 34 is installed at one end of the connecting shaft 33 away from the driving member, i.e., the first bearing 34 is installed on the first mesh cover 31, and the second bearing 35 is installed at one end of the connecting shaft 33 closer to the driving member, i.e., the second bearing 35 is installed on 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] The first mesh cover 31 has a flat, disc-like structure, and the second mesh cover 32 has an arc-shaped, bowl-like structure, which provides an internal space for the fan blades to rotate. The edges of the second mesh cover 32 are made of a mesh structure formed from multiple wires, which ensures that as much air as possible generated by the rotation of the fan blades passes through the air outlets formed in the first mesh cover 31, thereby improving the efficiency of the fan 100. Furthermore, the installation of the first mesh cover 31 and the second mesh cover 32 prevents personal injury or short circuits caused by interference with the human body or other objects. That is, the first mesh cover 31 and the second mesh cover 32 prevent external 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 and positioned 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 and positioned 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 and positioned 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 is the same as the radial size of the first bearing 34, so that 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 position along the axial direction. The radial size of the hole 321 matches 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, which further restricts the axial movement of the second bearing 35 relative to the second mesh cover 32, thereby fixing the first bearing 34 and the second bearing 35 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 adjust their own axial position, ensuring the stability of transmission.

[0043] In some embodiments, 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, and the first position restriction protrusion 312 and the first position restriction groove 341 are inserted along the radial direction of the first bearing 34, and / or a second position restriction 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 restriction groove 351 is provided on the other, and the second position restriction protrusion 322 and the second position restriction 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 and fitted 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 and fitted along the radial direction of the second bearing 35. or a first position restriction protrusion 312 is provided on only 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, and the first position restriction protrusion 312 and the first position restriction groove 341 are inserted and fitted along the radial direction of the first bearing 34; or a second position restriction protrusion 322 is provided on only 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 restriction groove 351 is provided on the other, and the second position restriction protrusion 322 and the second position restriction groove 351 are inserted and fitted 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 is disposed 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 restricting protrusion 312 is installed on the inner peripheral wall of the first connecting hole 311, the first position restricting groove 341 is installed on the outer peripheral wall of the first bearing 34. In this embodiment, the first position restricting protrusion 312 is installed on the inner peripheral wall of the first connecting hole 311, and the first position restricting groove 341 is installed on the outer peripheral wall of the first bearing 34. The first position restricting protrusion 312 and the first position restricting 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, and 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. 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, and the second position control groove 351 is installed on the outer peripheral wall of the second bearing 35, and 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 positioned and fixed 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 covers the open end of the first connection hole 311.

[0048] Specifically, as shown in FIG. 1 , the first connecting hole 311 penetrates 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, engages with the first bearing 34 and supports the connecting shaft 33. The other end of the first connecting hole 311, away from the motor base 2, is connected to the outside. A decorative plate 37 is provided on the side of the first mesh cover 31 that is away 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 connecting hole 311, making it easier to remove the fan head 3 and protecting the first connecting hole 311, improving safety in use. At the same time, the internal structure is hidden from view from the front of the fan 100, streamlining the overall structure of the fan 100 and ensuring a visually comfortable experience for the user.

[0049] 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 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 within 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; the connecting shaft 33 is drilled through the inner support 382, ​​and a connecting hole is provided in the inner support 382, ​​the size of which corresponds to 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 within the outer support ring 381, i.e., the connecting shaft 33 is rotatably mounted within the outer support ring 381, which further allows the connecting shaft 33 to rotate relative to the housing, thereby transmitting power to the blades 36 via the connecting shaft 33.

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

[0052] Here, the first bearing 34 is fitted onto the outside of the front shaft 332, and the second bearing 35 and the blades 36 are both fitted onto the outside of the main body 331. The rear shaft 333 is power-connected to the drive member. The first bearing 34 is fitted onto the outside of the front shaft 332. The radial dimension of the connecting hole of the inner support 382 of the first bearing 34 matches the radial dimension of the front shaft 332, and the outer diameter of the front shaft 332 is smaller than the outer diameter of the main body 331, further limiting the axial displacement of the connecting shaft 33. The blades 36 are fitted onto the outside of the main body 331. When the fan 100 is in operation, the rotation of the blades 36 generates airflow. At the same time, the blades 36 are subjected to a counteracting force caused by the airflow, and the counteracting force is transmitted along the blades 36 to the connecting shaft 33. The outer diameter of the blades 36 installed on the main body 331 is large, which improves the structural strength of the main body 331 and prevents the connecting shaft 33 from being bent due to excessive force.

[0053] In some embodiments, a damping 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 support 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 when the connecting shaft 33 transmits power and improve the smooth operation of the fan 100. During the power transmission process, the bearing structure can provide support for the connecting shaft 33. At the same time, when the blades 36 rotate, an acting force is exerted on the bearing structure, 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, a bearing structure is installed between the mesh cover structure and the connecting shaft 33 and can be used to provide support for the connecting shaft 33. The bearing structure requires regular maintenance during use, and the bearing structure is detachably attached to the mesh cover structure, which saves maintenance time. When the bearing structure is damaged, only the bearing structure needs to be replaced, thereby saving 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 to them. This acting force is then transmitted to the bearing structure via the connecting shaft 33. By configuring the bearing structure as an independent member, the conduction path for the acting force is increased, further weakening the acting effect. A buffer structure is also installed between the bearing structure and the housing, and this buffer structure can be configured 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 smooth 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 is used to axially position the connecting shaft 33, and 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, which can provide a dynamic clearance control function when the connecting shaft 33 rotates, and can ensure that the connecting shaft 33 has an appropriate clearance along the axial direction, thereby preventing axial deviation during internal rotation of the fan 100 and affecting the operating stability of the fan 100.

[0060] Therefore, 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 to the smooth rotation of the output end of the connecting shaft 33 and the smooth rotation of the fan blades, and prevents the axial vibration and friction of the connecting shaft 33, thereby reducing noise, improving the efficiency of the power transmission between the driving member and the connecting shaft 33, strengthening the functionality of the fan 100, and improving the service life of the product and the user experience. In addition, the structure is simple and the applicability is strong.

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

[0062] 8, the elastic bearing member 44 includes two parts, one of which is a bearing portion 441 and the other is an elastic portion 442. The bearing portion 441 can be connected to the elastic portion 442 to form the elastic bearing member 44, wherein the bearing portion 441 and the fan head 3 are fixed relative to each other in the axial direction, thereby fixing the bearing portion 441 and fixing the elastic bearing member 44. The elastic bearing member 44 is configured as an annular ring and is coaxially connected to the connecting shaft 33, thereby rotatably supporting the connecting shaft 33 inside the fan head 3 and realizing the connection of the connecting shaft 33 and allowing the connecting shaft 33 to rotate relative to the fan head 3. The elastic portion 442 can exert an elastic force on the connecting shaft 33 and is used to adjust the axial clearance of the connecting shaft 33.

[0063] If the axial clearance of the connecting shaft 33 is too large, the elastic portion 442 of the pretensioner structure will release and absorb the excess clearance, exerting an elastic force on the connecting shaft 33 toward the driving member, thereby reducing the axial clearance of the connecting shaft 33. If the axial clearance of the connecting shaft 33 is small, the elastic portion 442 of the pretensioner structure will bear the compression of the connecting shaft 33, thereby releasing a certain axial clearance for the connecting shaft 33, thereby increasing the axial clearance of the connecting shaft 33, thereby preventing the connecting shaft 33 from rotating smoothly due to an axial clearance that is too small. In this way, the elastic portion 442 can comprehensively adjust the axial clearance of the connecting shaft 33, ensuring that the axial clearance of the connecting shaft 33 is more stable.

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

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

[0066] Furthermore, the pretensioner structure may be configured as a sleeve, which is axially mounted inside the fan head 3 and is mounted adjacent to the end of the output end of the connecting shaft 33. In actual design, the sleeve may be configured as a ring, which is fitted over the connecting shaft 33 and has both ends axially positioned and fixed to achieve the sleeve's fixed mounting. Here, the sleeve may have two forms: one is configured as a rigid sleeve, which ensures 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 an elastic sleeve, which has compressibility, which ensures that the axial clearance of the connecting shaft 33 is controlled within a certain range during the operation of the connecting shaft 33, realizes dynamic control of the axial clearance of the connecting shaft 33, and can meet the axial clearance requirement of the connecting shaft 33.

[0067] As a result, 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 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 operatively coupled and connected via the first coupling member 39 and the second coupling member 21.

[0069] Specifically, as shown in FIGS. 1 to 4, a motor base 2 is installed on the fan 100, and the motor base 2 is used to mount a driving member, which can output power to the outside. A second coupling member 21 is provided at the output end of the driving member. 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 detachable and can improve safety. A gasket 41 is installed on the locking screw 22 to increase the pressure-receiving area and ensure connection reliability. A fan head 3 is further installed on the fan 100, and fan blades are installed in the fan head 3. The fan blades are rotatably mounted in the housing of the fan head 3, and blades are attached to the fan blades. a second coupling member 21 is mechanically coupled to the first coupling member 39; the power output from the driving member is used to rotate the fan blades to generate airflow; and the power output from the driving member is output to the first coupling member 39 by the second coupling member 21, and then transmitted to the fan blades to rotate them.

[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, which is also operatively 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 ensuring 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 threadedly engaged with each other along the circumferential direction of the motor base 2 .

[0072] Specifically, when the fan 100 is operating, the driving member installed inside the motor base 2 outputs power, which is then transmitted to the first coupling member 39 via the second coupling member 21, causing the fan blades to rotate. The rotation of the fan blades generates airflow, which, while generating airflow, exerts a counter-acting force on the fan blades, which is then transmitted to the second coupling member 21 by the fan blades. The first coupling member 39 and the second coupling member 21 are threadedly installed around the periphery of the motor base 2, and this acting force tightly connects the first coupling member 39 and the second coupling member 21, ensuring reliable power transmission and improving 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 attached to the motor base 2 and is used to trigger the microswitch 24.

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

[0075] In some embodiments, the child lock member includes a slide operating piece 25 and a switch push plate 26 connected together, 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 connected to and installed on 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, 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, they can operate the switch push plate 26 and the microswitch 24, and 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 safety in 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, and the latch pin 27 is movable along the radial direction of the motor base 2. A latch portion is provided on the fan head 3, and the latch pin 27 is installed so as 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 can move 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, and further ensuring the reliability of the engagement between the fan head 3 and the motor base 2. This prevents the fan head 3 from detaching from the motor base 2 during use, thereby improving safety when used.

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

[0080] Specifically, a first connection part is provided on the side of the fan head 3 closest to the motor base 2, and a second connection part is provided on the side of the motor base 2 closest to the fan head 3. The first and second connection parts are connected by a method such as insertion. After the first connection part is inserted and connected to the second connection part, the latch pin 27 is inserted into the latch jack, further fixing the fan head 3 to the motor base 2. 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 attachment and detachment of the fan head 3 to the motor base 2. This method of removing the fan head 3 is simple and easy, and also makes it easy to remove and clean the fan head 3. The ability to remove the fan head 3 for cleaning ensures that the fan 100 blows clean air and improves the user experience.

[0081] In some embodiments, the fan 100 further includes a 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 below the fan 100, and the base 1 is tall. The motor base 2 is attached to the upper end of the base 1, realizing 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. When the fan 100 is in operation or in a non-operational state, the base 1 is supported on the mounting surface, which makes the mounting of the fan 100 more stable. The base 1 supports the fan 100 on the mounting surface, i.e., the fan 100 can be placed on the floor. Such a floor-mounted fan is advantageous for the overall stability of the fan 100. In actual use, the fan 100 can be installed as a tabletop or wall-mounted type, etc., and the length of the rod installed on the base 1 of the fan 100 can be selected according to the actual use. When the fan 100 is installed on a tabletop, the length of the rod installed on the base 1 can be short. When the fan 100 is installed on a wall, 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, allowing the fan head 3 to be completely and independently detached from the motor base 2. In this way, when the user cleans the fan 100, the fan head 3 can be cleaned independently, which is not only advantageous in improving cleaning efficiency but also convenient for the user to clean it more frequently, ensuring that the fan 100 can always blow out fresh and clean air, 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 into one unit, and at the same time, the motor base 2 and its internal structural components such as the motor can be integrated into one unit. When the fan head 3 and 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 installed. This simplifies the removal structure and does not complicate the connection relationship, greatly reducing the time required to remove the fan head 3 from the motor base 2. At the same time, after the fan head 3 is removed from the motor base 2 as an independent unit, the user can wash the entire fan head 3, or the internal structural components of the fan head 3 can be removed and washed, meeting the user's cleaning needs.

[0085] In some embodiments, the fan head 3 is provided with an air outlet hole, and the fan blades are configured as axial fan blades, which are adapted to drive the airflow in the fan head 3 to flow along the axial direction of the axial fan blade to the air outlet hole. That is, unlike conventional centrifugal fan blades, the fan blades of the fan 100 of the present invention can achieve axial intake and axial exhaust, and during actual operation, the axial fan blades rotate and drive the airflow behind the axial fan blades to flow forward along the axial direction, and the air outlet hole at the front of the fan head 3 is directed toward the user's face.

[0086] Here, it is also possible to install an air intake hole on the fan head 3. The air intake hole may be located on the rear side of the fan head 3 and intake air in the axial direction, or on the outer circumferential side of the fan head 3 and intake air at an angle. Either way, the airflow entering the fan head 3 will flow to the axial rear end of the axial fan blades, and then, under the action of the axial fan blades, will flow forward along the axial direction to the air outlet hole. In particular, an air intake hole can be installed on the rear side of the fan head 3, and at the same time, a heat dissipation flow path can be installed in the motor base 2, which connects the heat dissipation flow path to the air intake hole. Further, under the driving action of the axial fan blades, the airflow will dissipate heat from the driving components and so on during the heat dissipation flow before flowing through the air intake hole to the user. This is not only advantageous for airflow, but also enables internal heat dissipation in the motor base 2.

[0087] Furthermore, 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 drive member is located, and / or the ratio of the radial dimension to the axial dimension of the fan head 3 is at least 1. Therefore, the fan 100 of the present invention is different from a conventional cross-flow wind turbine, in that while 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, 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 drive 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 more stably mounted than centrifugal fan blades, and the stability of the position of the fan 100 is ensured.

[0089] In some embodiments, the fan head 3 is adapted to be coupled to the motor base 2 in an 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 can be moved along the first direction relative to the motor base 2, and the fan head 3 and the motor base 2 can be connected and fixed together. For example, if the first direction is along the horizontal direction, the fan head 3 can be attached to the front end of the motor base 2 from front to back along the horizontal direction, thereby realizing the connection and fixation between 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 relative to the base 1, such as up, down, left, and right. At this time, the fan head 3 can be adjusted so that its axis is parallel to the vertical direction, which increases the adjustment range of the fan head 3 and meets the user's needs for air flow in more directions.

[0092] In the description herein, references to "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" mean that the particular feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Exemplary references to the above terms 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 understand that these embodiments are capable of various changes, modifications, substitutions, and variations without departing from the principles and purposes of the present invention, and that 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, microswitch 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 regulating protrusion 312, second mesh cover 32, second connecting hole 321, second position regulating protrusion 322, connecting shaft 33, main body 331, front shaft portion 332, rear shaft portion 333, first bearing 34, first position regulating groove 341, second bearing 35, second position regulating 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 via bearing structures, respectively, and the connecting shaft is power-connected to the driving member; the first mesh cover is detachably coupled 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; 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 while being regulated in position along the axial direction; and / or A fan 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.

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

3. 2. The fan of claim 1, wherein 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.

4. 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 via bearing structures, respectively, and the connecting shaft is power-connected to the driving member; the first mesh cover is detachably coupled 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; the connecting shaft includes a main body portion, and a front shaft portion and a rear shaft portion connected to both ends of the main body portion, respectively, 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, A fan characterized in that 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.

5. 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 via bearing structures, respectively, and the connecting shaft is power-connected to the driving member; a pretensioner structure coupled to the connecting shaft for regulating the position of the connecting shaft in the axial direction, the pretensioner structure is configured as an elastic bearing member, the elastic bearing member including a bearing portion and an elastic portion coupled 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 may be configured as a sleeve, the sleeve being fixedly attached within the fan head along the axial direction, and the sleeve being fitted outside the connecting shaft and fixedly attached to the connecting shaft along the axial direction.

6. 6. The fan of claim 5, wherein the first mesh cover is detachably coupled 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.

7. 7. The fan of claim 1, wherein the first bearing and the second bearing each include an outer support ring and an inner support, the outer support ring is connected to the corresponding first mesh cover or second mesh cover, the inner support is rotatably mounted within the outer support ring, and the connecting shaft is drilled through the inner support.

8. the connecting shaft includes a main body portion, and a front shaft portion and a rear shaft portion connected to both ends of the main body portion, respectively, 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, 7. The fan according to claim 1, wherein the first bearing is fitted to the outside of the front shaft portion, the second bearing and the blade are both fitted to the outside of the main body portion, and the rear shaft portion is power-connected to the drive member.

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