Detachable fan

Abstract

The utility model provides a detachable fan which comprises a motor, a main shaft extending in the axial direction is arranged on the motor, and a blocking piece is arranged on the side wall of the main shaft. Each fan blade assembly comprises a blade part and a sleeve part, and the blade parts of all the fan blade assemblies are spliced in the circumferential direction and define a whole-circle fan blade; the sleeve parts are sequentially arranged in a stacked and sleeved mode in the axial direction of the main shaft, and the sleeve part located on the lowermost layer abuts against the blocking piece. The gland is fixed to the top end of the main shaft, makes contact with the upper end faces of the sleeve parts of all the fan blade assemblies and is used for limiting the fan blade assemblies from moving upwards along the main shaft. A traditional integrated fan blade is divided into a plurality of fan blade assemblies which can be independently disassembled and assembled, all the assemblies can be packaged and placed in a stacked mode, the packaging size and the transportation cost are greatly reduced, and the fan blade assembly is particularly suitable for logistics transportation and warehouse management of large-size fans.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric fan, concretely relates to a detachable fan. BACKGROUND

[0002] At present, fan products on the market generally adopt integrated fan blade structure design, and this structure is mature in manufacturing process, but has many limitations in actual application. With the increase of fan size, the transportation, storage and use of integrated fan blades all face severe challenges. In the transportation link, large-size fan blades need to occupy a large space, which not only increases the logistics cost, but also is easy to collide and damage in the transportation process; in the storage link, integrated fan blades have high requirements for warehouse space, which increases the inventory management cost of enterprises; in the use link, once part of the fan blades are damaged, the whole fan blades need to be replaced, which causes resource waste. In addition, although the traditional split fan blades solve the problems of transportation and storage to some extent, they generally adopt the connection mode of bolt fastening, and have problems of complex assembly and poor connection stability, and are easy to vibrate and produce noise in high-speed operation, which affects the use experience.

[0003] In view of these problems in the prior art, it is urgent to develop a new fan structure which can meet the requirements of convenient transportation and flexible assembly, and can ensure the connection stability and operation reliability. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a detachable fan for solving the technical problems of high transportation and storage cost and large space occupied by packaging in the prior art.

[0005] The utility model provides a detachable fan, which comprises a motor, an axially extending main shaft is arranged on the motor, and a blocking piece is arranged on the side wall of the main shaft; at least two fan blade assemblies, each fan blade assembly comprises a blade part and a sleeve part, wherein: the blade parts of all the fan blade assemblies are circumferentially spliced and surrounded to form a whole circular fan blade; the sleeve parts are sequentially stacked along the main shaft in the axial direction, and the sleeve part located at the lowermost layer abuts against the blocking piece; a gland is fixed to the top end of the main shaft and in contact with the upper end surfaces of the sleeve parts of all the fan blade assemblies, and is used for limiting the upward movement of the fan blade assemblies along the main shaft.

[0006] In an embodiment of the utility model, the radially extending ends of the blade parts are located on the same circumference.

[0007] In an embodiment of the utility model, the sleeve part comprises an arc-shaped side wall and a sleeve connected to the inner side of the arc-shaped side wall, and the sleeves are distributed in the axial direction with a gradient decrease at the connection positions on the inner sides of the corresponding arc-shaped side walls; when all the sleeves are stacked along the main shaft in the axial direction, the end surfaces of adjacent sleeves form an axially close fit, and the sum of the axial heights of the sleeves is equal to the axial length of the cylindrical shell formed by splicing the arc-shaped side walls.

[0008] In one embodiment of the present invention, the central angles of the arc-shaped sidewalls of each fan blade assembly are equal, and the axial heights of the sleeves of each fan blade assembly are the same.

[0009] In one embodiment of the present invention, the top end of the main shaft is provided with an external thread structure, and the center of the pressure cap is provided with an internal thread hole that matches the external thread structure; the pressure cap is screwed and fastened to the external thread structure at the top end of the main shaft through the internal thread hole, so that the lower end face of the pressure cap presses against the upper end face of the arc-shaped sidewall of all fan blade assemblies.

[0010] In one embodiment of the present invention, each of the sleeve portions has at least one raised rib on the upper end face of the arc-shaped sidewall, and the lower end face of the pressure cap has a limiting groove corresponding to the position of the raised rib; when the pressure cap is installed to the top of the main shaft, each of the raised ribs is embedded in the corresponding limiting groove, forming a circumferential constraint on the pressure cap.

[0011] In one embodiment of this utility model, the ribs are distributed at intervals along the circumference, and all the ribs together form a complete or incomplete annular structure.

[0012] In one embodiment of the present invention, the blocking member is a horizontal metal rod, and the lowest sleeve portion is provided with a notch adapted to the horizontal metal rod; when the fan blade assembly is installed in place, the horizontal metal rod is embedded in the notch of the lowest sleeve portion.

[0013] In one embodiment of the present invention, an axial through hole is provided at the center of the sleeve portion, and the axial through hole is clearance-fitted with the main shaft and coaxially arranged.

[0014] In one embodiment of this utility model, the fan blade assembly is made of polycarbonate material.

[0015] As described above, the detachable fan of this utility model has the following beneficial effects:

[0016] (1) By breaking down the traditional one-piece fan blade into multiple fan blade components that can be disassembled and assembled independently, each component can be packaged separately and stacked, which greatly reduces the packaging volume and transportation cost, and is particularly suitable for the logistics transportation and warehousing management of large-size fans.

[0017] (2) The sleeve part of each fan blade assembly adopts a gradient decreasing design. Combined with the main shaft blocking part and the top cover structure, all components can be accurately positioned and reliably fixed by simply tightening the cover, which significantly simplifies the assembly process and improves the disassembly and assembly efficiency.

[0018] (3) Through multiple positioning mechanisms such as the notch fit of the blocking part, the tight fit of the sleeve end face and the circumferential constraint of the pressure cover, the vibration amplitude and noise level of the fan during operation are effectively controlled, thereby improving the performance and user experience of the product.

[0019] (4) The use of high-strength engineering plastics and a precisely designed clearance fit structure not only ensures the mechanical strength of the components, but also avoids the deformation problem caused by thermal expansion and contraction, thus significantly extending the service life of the products. Attached Figure Description

[0020] Figure 1 The image shown is a front view of the detachable fan described in an embodiment of this utility model.

[0021] Figure 2 The image shown is a rear view of the detachable fan described in an embodiment of this utility model.

[0022] Figure 3 The image shown is an exploded view of the detachable fan described in an embodiment of this utility model.

[0023] Figure 4 The diagram shown is a schematic diagram of the assembly of two blades according to an embodiment of this utility model.

[0024] Figure 5 The diagram shown is a schematic diagram of the three-blade assembly according to an embodiment of this utility model.

[0025] Figure 6 The image shown is a cross-sectional view of the detachable fan described in an embodiment of this utility model.

[0026] Component designation explanation

[0027] 1. Motor

[0028] 11 Spindle

[0029] 111 External thread structure

[0030] 12 blocking components

[0031] 2. Fan blade assembly

[0032] 21. Blade section

[0033] 22 Sleeve section

[0034] 221 Arc-shaped sidewall

[0035] 222 Sleeve

[0036] 223 Axial through hole

[0037] 224 ribs

[0038] 3. Capping

[0039] 31 Limiting groove Detailed Implementation

[0040] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0042] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0043] The following embodiments of this utility model disclose a detachable fan that can meet the needs of convenient transportation and flexible assembly, while ensuring connection stability and operational reliability.

[0044] This embodiment provides a detachable fan, such as Figures 1-3 As shown, it mainly includes a motor 1, a fan blade assembly 2, and a pressure cover 3. The structure and assembly relationship of each component are described in detail below with reference to the attached drawings. Among them, Figure 1 This is a front view of the detachable fan; Figure 2 This is a rear view of the detachable fan; Figure 3 This is an exploded view of the detachable fan.

[0045] The motor 1 has an axially extending main shaft 11, and a blocking member 12 is provided on the side wall of the main shaft 11.

[0046] Specifically, a blocking member 12 is laterally fixed to the side wall of the spindle 11 near the bottom region. The blocking member 12 is preferably a rigid metal rod, the two ends of which are fixed to the through hole in the side wall of the spindle 11 by welding or threaded connection, forming a limiting structure that extends laterally through the spindle 11.

[0047] At least two fan blade assemblies 2 are assembled sequentially along the main shaft 11. Each fan blade assembly 2 consists of an integrally formed blade portion 21 and a sleeve portion 22.

[0048] Specifically, the blade portion 21 is an arc-shaped plate structure, and the blade portions 21 of all fan blade assemblies 2 are connected end to end in the circumferential direction to form a complete circular fan blade outline.

[0049] For example, the radial free ends of each blade portion 21 extend to the same circumferential position to ensure dynamic balance when the fan blades rotate.

[0050] The sleeve portion 22 is located at the inner root of the blade portion 21, and has an axial through hole 223 at its center. The axial through hole 223 and the outer wall of the main shaft 11 form a clearance fit relationship, which allows the sleeve portion 22 to slide along the main shaft 11 axially but restricts radial displacement.

[0051] In some embodiments, the main structure of the sleeve portion 22 includes an arcuate sidewall 221 and a sleeve 222 fixedly connected to the inner side of the arcuate sidewall 221.

[0052] Specifically, the curvature of the arc-shaped sidewall 221 matches the root of the blade portion 21, and the arc-shaped sidewalls 221 of multiple fan blade assemblies 2 are circumferentially spliced ​​to form a continuous cylindrical shell. The connection positions of each sleeve 222 on the inner side of the arc-shaped sidewall 221 are distributed in a gradient decreasing from top to bottom along the axial direction, so that when all fan blade assemblies 2 are stacked and installed, the end faces of adjacent sleeves 222 are tightly fitted, and the total axial height of all sleeves 222 is consistent with the axial length of the cylindrical shell.

[0053] For example, the arcuate sidewall 221 of each fan blade assembly 2 has an equal central angle and the axial height of the corresponding sleeve 222 is the same, thereby ensuring the interchangeability between the components.

[0054] During installation, the bottommost fan blade assembly 2 is first fitted onto the main shaft 11, aligning the notch at the bottom of its sleeve 222 with the blocking member 12 on the side wall of the main shaft 11. The notch is a groove structure adapted to the shape of the blocking member 12; when the sleeve 222 is lowered into position, the blocking member 12 embeds into the notch, achieving circumferential limiting of the sleeve 222. Subsequently, the remaining fan blade assemblies 2 are installed in sequence, with the gradient distribution design of each sleeve 222 ensuring that the end faces of adjacent sleeves 222 automatically align and fit tightly during the stacking process. Finally, the axial position of all components is fixed by the pressure cap 3 structure, completing the assembly.

[0055] In this implementation, the fan blade assembly is quickly disassembled and reliably fixed by circumferential splicing of the blade section, gradient stacking of the sleeve section, and cooperation between the blocking component and the notch, while ensuring the rigidity of the overall structure and the operational stability.

[0056] In specific assembly implementation, the number of fan blade assemblies 2 can be flexibly configured according to actual needs. For example... Figure 4 The schematic diagram of the two-blade assembly shown depicts two blade assemblies 2 symmetrically distributed at 180°, with their blade portions 21 circumferentially joined to form a complete circular blade. At this time, the gradient distribution of the sleeve portions 22 is manifested as two sleeves 222 of equal height stacked from top to bottom along the main shaft 11. The notch at the bottom of the lower sleeve 222 precisely engages with the blocking member 12 of the main shaft 11, forming an initial positioning reference.

[0057] like Figure 5 The schematic diagram of the three-blade assembly shows three blade assemblies 2 spaced at equal 120° intervals. The arc-shaped sidewalls 221 of each blade portion 21 are seamlessly connected circumferentially to form a cylindrical outer shell. In this embodiment, the connection height of the three sleeves 222 decreases arithmetically along the axial direction. After stacking, the end faces of adjacent sleeves 222 fit tightly together, and the total height strictly matches the axial length of the cylindrical outer shell. During installation, after the notch of the bottom sleeve 222 mates with the blocking member 12, the remaining sleeves 222 automatically align based on the gradient distribution, ensuring that no additional adjustments are required during assembly.

[0058] Regardless of whether it's a two-blade or three-blade configuration, all embodiments follow the same axial stacking principle: self-aligning assembly is achieved through a sleeve gradient distribution, circumferential constraints are provided by the engagement of blocking elements and notches, and finally, axial fixation is completed by the cap structure described later. This design allows for expansion of the number of blade assemblies simply by adjusting the sleeve gradient parameters proportionally, without changing the basic assembly logic, significantly improving product customizability.

[0059] In some embodiments, the fan blade assembly 2 is integrally injection molded from polycarbonate material, with its blade portion 21 and sleeve portion 22 forming a rigid structure with seamless connection. The high strength properties of polycarbonate enable the blade portion 21 to withstand the aerodynamic load generated by high-speed rotation while maintaining a thin and curved profile, while the sleeve portion 22 utilizes the wear resistance of the material to ensure long-term stable clearance fit with the main shaft 11.

[0060] The pressure cap 3 is a disc-shaped structure, fixedly installed on the top end face of the main shaft 11, and its lower end face is in direct contact with the upper end face of the sleeve portion 22 of all fan blade assemblies 2. When the pressure cap 3 is axially fixed, the continuous pressing force of the lower end face on the sleeve portion 22 prevents the fan blade assembly 2 from displacing upward along the main shaft 11, thus forming a stable axial constraint.

[0061] In some implementations, such asFigure 6 As shown, the top end of the spindle 11 is machined with an external thread structure 111, and the center of the pressure cap 3 is provided with a matching internal thread hole. During assembly, the internal thread hole of the pressure cap 3 is aligned with the external thread structure 111 at the top end of the spindle 11 and screwed in. The axial pressure generated by the thread engagement makes the lower end face of the pressure cap 3 fit tightly against the upper end face of the sleeve portion 22. The length of the external thread structure 111 is designed to ensure that the pressure cap 3 provides sufficient clamping force after being tightened, without excessively compressing the sleeve portion 22 and causing structural deformation.

[0062] To further enhance the connection stability between the pressure cap 3 and the fan blade assembly 2, in some embodiments, a strip-shaped rib 224 is provided on the upper end face of the arc-shaped sidewall 221 of each sleeve portion 22. The rib 224 extends circumferentially along the sleeve portion 22, and the height of the rib 224 is slightly lower than the upper end face of the sleeve portion 22.

[0063] Correspondingly, the lower end face of the pressure cap 3 is machined with a limiting groove 31 that matches the shape of the rib 224. When the pressure cap 3 is installed on the top of the main shaft 11 and tightened, each rib 224 is precisely embedded in the corresponding limiting groove 31, forming a circumferential constraint on the pressure cap 3. This structure can prevent the pressure cap 3 from shifting circumferentially due to vibration when the fan is running, and can also improve the torsional resistance of the overall structure through the interlocking effect of the rib 224 and the limiting groove 31.

[0064] In this implementation, axial clamping force is provided through threaded fastening, combined with the circumferential constraint of the rib and the limiting groove, forming a dual fixing mechanism. During installation, only rotating the pressure cap is required to simultaneously complete axial fixing and circumferential limiting, significantly simplifying the assembly process while ensuring the structural reliability of the fan under high-speed operating conditions.

[0065] In summary, this utility model relates to a detachable fan, mainly composed of three parts: a motor assembly, a split-type fan blade assembly, and a cover fixing mechanism. The motor output shaft extends to form a main shaft, and its side wall is provided with a transverse blocking component. Multiple independent fan blade assemblies are stacked and assembled along the main shaft axially via sleeve portions. Each fan blade assembly includes an integrally formed blade portion and a sleeve portion, and all blade portions are circumferentially spliced ​​to form a complete circular fan blade. The sleeve portion adopts a gradient decreasing stacking design, with the end faces of adjacent sleeves tightly fitting together, and the bottom sleeve forming a limiting fit with the main shaft blocking component. The cover is fixed to the top of the main shaft via a threaded connection, and its lower end face contacts the upper end face of the sleeve portion to form axial constraint. At the same time, circumferential positioning is achieved through the cooperation of the rib and the limiting groove. This design achieves rapid disassembly and assembly and transportation of the fan blades through a modular split structure, ensures assembly accuracy through gradient stacking, and ensures operational stability through multiple fixing mechanisms. Furthermore, the polycarbonate one-piece molding process gives the product the characteristics of being lightweight, high-strength, and weather-resistant, making it particularly suitable for large-size fan applications that require frequent disassembly or long-distance transportation.

[0066] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0067] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A detachable fan characterized by, The detachable fan comprises: a motor provided with an axially extending main shaft, and a blocking member provided on the side wall of the main shaft; at least two vane assemblies, each comprising a vane part and a sleeve part, wherein: the vane parts of all the vane assemblies are circumferentially spliced and combined to form a whole circular vane; the sleeve parts are axially stacked in sequence along the main shaft, and the sleeve part at the lowermost layer abuts against the blocking member; a gland fixed to the top end of the main shaft and in contact with the upper end faces of the sleeve parts of all the vane assemblies, for limiting upward movement of the vane assemblies along the main shaft.

2. The detachable fan of claim 1, wherein, The radially extending ends of the vane parts are located on the same circumference.

3. The detachable fan of claim 1, wherein, The sleeve part comprises an arc-shaped side wall and a sleeve connected to the inner side of the arc-shaped side wall, and the sleeves are distributed in a gradient decreasing along the axial direction at the connection positions on the inner side of the corresponding arc-shaped side walls; when all the sleeves are axially stacked along the main shaft, the end faces of adjacent sleeves form an axially close fit, and the sum of the axial heights of the sleeves is equal to the axial length of the cylindrical shell formed by splicing the arc-shaped side walls.

4. The detachable fan of claim 3, wherein, The central angles of the arc-shaped side walls of each vane assembly are equal, and the axial heights of the sleeves of each vane assembly are the same.

5. The detachable fan according to claim 3, wherein: the top end of the main shaft is provided with an external thread structure, and the center of the gland is provided with an internal thread hole matched with the external thread structure; the gland is fastened by screwing the internal thread hole with the external thread structure at the top end of the main shaft, so that the lower end face of the gland presses the upper end faces of the arc-shaped side walls of all the vane assemblies.

6. The detachable fan according to claim 3, wherein: the upper end face of the arc-shaped side wall of each sleeve part is provided with at least one protruding rib, and the lower end face of the gland is provided with a limiting groove corresponding to the position of the protruding rib; when the gland is installed to the top end of the main shaft, each protruding rib is embedded in the corresponding limiting groove, forming a circumferential constraint on the gland.

7. The detachable fan of claim 6, wherein, The protruding ribs are distributed in a circumferential interval, and all the protruding ribs together form a complete or incomplete annular structure.

8. The detachable fan of claim 1, wherein, The blocking member is a transverse metal rod, and the sleeve part at the lowermost layer is provided with a notch matched with the transverse metal rod; when the vane assembly is installed in place, the transverse metal rod is embedded in the notch of the sleeve part at the lowermost layer.

9. The detachable fan of claim 1, wherein, An axial through hole is provided at the central position of the sleeve part, which is gap-fitted and coaxially arranged with the main shaft.

10. The detachable fan of claim 1, wherein, The vane assembly is made of polycarbonate material.

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