Blade assembly for a fan

Abstract

The application discloses a spliced fan blade of a fan, which comprises a first fan body, a second fan body and a connecting assembly. The connecting assembly comprises a connecting shell, which is internally provided with a first insertion cavity and a second insertion cavity. A first connecting part of the first fan body and a second connecting part of the second fan body are respectively inserted into the corresponding insertion cavities and are circumferentially limited through an inner wall structure adaptation. At least one set of first bolt structures and second bolt structures are arranged on the connecting shell and used for locking and fixing the two fan bodies. A buckle part has an elastic barb part at an end thereof, can be clamped with a clamping groove on the connecting part and realizes axial prepositioning and radial auxiliary fixing before bolt locking. Through the cooperative action of the insertion limiting, bolt main locking and buckle prepositioning, the fan blade modular splicing is realized, and the advantages of convenient assembly, reliable connection, stable operation and easy maintenance are achieved, and the application is suitable for a large-diameter or detachable fan structure.

Description

Technical Field

[0001] This application relates to the field of fan structure technology, specifically to a fan blade splicing structure. Background Technology

[0002] As fan products become larger and more modular, traditional one-piece fan blades present numerous inconveniences in terms of transportation, installation, and maintenance. For example, large fan blades are bulky and prone to bending or collision damage during transportation; repairs require complete replacement, resulting in high costs.

[0003] Existing technologies already employ split-blade designs, connected via screws or clips. However, existing connection methods generally suffer from the following problems: First, low assembly precision: the lack of a pre-positioning structure makes it difficult to align bolts with holes, resulting in low assembly efficiency; Second, insufficient connection strength: relying solely on bolt tightening provides weak circumferential torsional resistance, making it prone to loosening during high-speed rotation; Third, inconvenient assembly and disassembly: exposed clip structures or limited operating space negatively impact user experience.

[0004] Therefore, there is an urgent need for a fan blade splicing structure that can ensure connection strength and stability, has a pre-positioning function, and is easy to assemble and disassemble. Utility Model Content

[0005] The purpose of this application is to provide a fan blade splicing structure to solve the technical problems of low assembly accuracy, unreliable connection, and inconvenient disassembly and assembly in the prior art, and to achieve fast, stable and repeatable splicing of fan blade segments.

[0006] To achieve the above objectives, this application provides the following technical solution: a splicing fan blade, characterized in that it comprises: a first fan body having a first connecting portion at one end; a second fan body having a second connecting portion at one end; a connecting assembly, the connecting assembly comprising: a connecting housing, the connecting housing having a first insert cavity and a second insert cavity in opposite directions inside, the first connecting portion being inserted into the first insert cavity, and the second connecting portion being inserted into the second insert cavity; at least one fastener, the fastener being engaged with a slot of the first connecting portion and / or the second connecting portion, so that the first connecting portion is restricted within the first insert cavity, and / or the second connecting portion is restricted within the second insert cavity; synchronously, the fastener and the connecting housing form a limiting engagement, so as to achieve axial pre-positioning and / or radial auxiliary fixing between the first fan body and / or the second fan body and the connecting assembly.

[0007] In some embodiments, the connecting housing is provided with a fixing groove; the first connecting part is provided with a first slot; when the first connecting part is inserted into the first insertion cavity, the fixing groove and the first slot can be selectively aligned so that the fastener can pass through the fixing groove and the first slot in sequence and engage with the engaging part of the connecting housing, thereby achieving axial X-direction limiting and radial Z-direction fixing.

[0008] In some embodiments, the second connecting part is provided with a second slot; when the second connecting part is inserted into the second cavity, the fixing groove and the second slot can be selectively aligned so that the fastener can pass through the fixing groove and the second slot in sequence and engage with the engaging part of the connecting housing, thereby achieving axial X-direction limiting and radial Z-direction fixing.

[0009] In some embodiments, the fastener includes an elastic barb portion with a limiting portion. When the fastener is inserted into the first slot or the second slot, the elastic barb portion undergoes elastic deformation and rebounds after reaching a preset position, so that the limiting portion engages with the engaging portion of the connecting housing to achieve a secure lock.

[0010] In some embodiments, the fastener includes a planar connecting portion, a first elastic barb portion, and a second elastic barb portion. The first elastic barb portion and the second elastic barb portion are located in the first insertion cavity and the second insertion cavity, respectively, and are connected into an integral structure through the planar connecting portion to achieve simultaneous fixation on both sides.

[0011] In some embodiments, the fixing groove is further provided with a spring clip receiving area. Both the first elastic barb portion and the second elastic barb portion include: a downward slope, which is connected to the planar connecting portion and tilts downwards; the planar connecting portion, the downward slope, and the spacer work together to axially limit the first connecting portion within the first insertion cavity; and / or axially limit the second connecting portion within the second insertion cavity; an upward slope, connected to the downward slope and tilting upwards, with the limiting portion located at the end of the upward slope; at least a portion of the downward slope and the upward slope of the first elastic barb portion engages with the first slot; at least a portion of the downward slope and the upward slope of the second elastic barb portion engages with the second slot; and a spring clip, connected to the end of the upward slope, which can elastically embed into the spring clip receiving area so that the limiting portion engages with the engaging portion.

[0012] In some embodiments, at least two fasteners are provided, symmetrically arranged on both sides of the connecting housing, and each fastener extends from the outer wall of the connecting housing toward the corresponding first cavity and / or second cavity.

[0013] In some embodiments, the first fan body and the second fan body are both thin-plate fan blade segments, and the outer edges of the first connecting part and the second connecting part are adapted to each other, forming a continuous and extended complete fan blade structure after splicing.

[0014] In some embodiments, the connecting assembly further includes: at least one set of first bolt structures, which pass through the connecting housing and extend into the first insertion cavity, and are threadedly connected or press-fitted with the first connecting portion of the first fan body to lock and fix the first connecting portion of the first fan body in the first insertion cavity; and / or at least one set of second bolt structures, which pass through the connecting housing and extend into the second insertion cavity, and are threadedly connected or press-fitted with the second connecting portion of the second fan body to lock and fix the second connecting portion of the second fan body in the second insertion cavity.

[0015] In some embodiments, one side surface of the connecting housing is provided with a plurality of positioning holes for fitting and installing the first bolt structure and / or the second bolt structure; the first connecting portion is provided with a first insertion hole; the first bolt structure includes a first screw and a first insert, the first insert passing through the positioning hole and the first insertion hole in sequence, the first screw passing through the first insert and the first insertion hole and being fixedly connected to a threaded hole at the bottom of the connecting housing to press and fix the first connecting portion; and / or the second connecting portion is provided with a second insertion hole; the second bolt structure includes a second screw and a second insert, the second insert passing through the positioning hole and the second insertion hole in sequence, the second screw passing through the second insert and the second insertion hole and being fixedly connected to a threaded hole at the bottom of the connecting housing to press and fix the second connecting portion.

[0016] The technical solution of the present invention has the following technical effects: First, it improves assembly efficiency: the snap-fit ​​mechanism enables quick pre-positioning, avoiding difficulties in aligning bolts with holes; second, it enhances connection reliability: the triple fixation of the insert, bolt, and snap-fit ​​provides excellent vibration and torsional resistance; third, it facilitates maintenance and disassembly: the modular design allows for independent replacement of individual fan blade sections; fourth, it reduces wind resistance: the snap-fit ​​mechanism is embedded in the fixing groove and does not protrude, reducing air resistance; fifth, it has strong applicability: it is suitable for fan blades made of various materials such as plastic and metal, and is compatible with fans of different sizes. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein: Figure 1 This is a schematic diagram of the overall structure of the spliced ​​fan blades in an embodiment of this application; Figure 2 This is a schematic diagram of the exploded structure of the spliced ​​fan blades in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the splicing fan blade connection assembly in an embodiment of this application; Figure 4 This is a front view of the spliced ​​fan blades and a cross-sectional view in the AA and BB directions of the fan in the embodiments of this application; Figure 5 for Figure 3 A structural schematic diagram of the connecting component in cross-section along the AA direction; Figure 6 for Figure 3 A structural schematic diagram of the connecting component in cross-section along the BB direction; Figure 7 This is a schematic diagram of the fastening mechanism for splicing fan blades in an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures: 20-First fan body; 200-First connecting part; 201-First slot; 202-First socket; 30-Second fan body; 300-Second connecting part; 301-Second slot; 302-Second socket; 10-Connecting assembly; 1-Connecting housing; 11-First cavity; 12-Second cavity; 13-Spare plate; 14-Fixing groove; 141-First spring clip receiving area; 142-Second spring clip receiving area; 1411-First engaging part; 1421-Second engaging part; 2-First bolt structure; 21-First screw; 22-First insert; 23-First positioning hole; 3-Second bolt structure; 31-Second screw; 32-Second insert; 33-Second positioning hole; 4-Snap fastener; 40-Flat connecting part; 41-First elastic barb part; 42-Second elastic barb part; 411-First limiting part; 4221-Second limiting part; 43-First spring piece; 44-Second spring piece; 1411-First engaging part; 1421-Second engaging part; 411, 422-Downward slope; 412, 422-Upward slope. Detailed Implementation

[0019] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0020] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] The accompanying drawings illustrate one or more examples of this application. The detailed description uses numerical and alphabetic designations to refer to features in the drawings. Similar or analogous designations in the drawings and description have been used to refer to similar or analogous parts of this application. As used herein, the terms “first,” “second,” and “third,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0022] like Figures 1 to 7 As shown in the embodiments of this application, this application provides a modular fan blade assembly that enables rapid and reliable assembly of each blade segment through a modular design. It is suitable for applications such as large-diameter industrial fans, duct fans, or detachable household fans. The modular fan blade assembly includes a first fan body 20 and a second fan body 30. One end of the first fan body 20 is provided with a first connecting portion 200, serving as an interface structure for docking with one end of the connecting component 10; one end of the second fan body 30 is provided with a second connecting portion 300, serving as an interface structure for docking with the other end of the connecting component 10.

[0023] Both the first fan body 20 and the second fan body 30 are thin-bladed fan blades, and their shapes are designed according to aerodynamics as airfoil structures with a certain curvature. The outer edge shapes of the first connecting part 200 and the second connecting part 300 are compatible with each other, which allows the two fan bodies to be easily spliced ​​together to form a complete fan blade structure, improving the convenience of installation and maintenance.

[0024] The connecting assembly 10 is used to splice and fix the first fan body 20 and the second fan body 30 in the axial X direction, ensuring structural stability and dynamic balance performance during rotation. Specifically, the connecting assembly 10 includes a connecting housing 1 and two fasteners 4. The connecting housing 1 has two oppositely oriented first insertion cavities 11 and second insertion cavities 12. A partition plate 13 is provided between the first insertion cavity 11 and the second insertion cavity 12. The first connecting part 200 is inserted into the first insertion cavity 11; the second connecting part 300 is inserted into the second insertion cavity 12. The fasteners 4 are engaged in the slots of the first connecting part 200 and / or the second connecting part 300, restricting their axial movement within the first insertion cavity 11 or the second insertion cavity 12, and forming a limiting engagement with the connecting housing 1. This design not only achieves a firm fixation between the fan body and the connecting assembly, but also provides pre-positioning in the axial X direction and auxiliary fixing functions in the radial Z direction, ensuring the stability and reliability of the overall structure.

[0025] In some embodiments, the connecting housing 1 is provided with a fixing groove 14, the first connecting part 200 is provided with a first slot 201, and the second connecting part 300 is provided with a second slot 301. When the first connecting part 200 and the second connecting part 300 are respectively inserted into the first insertion cavity 11 and the second insertion cavity 12, the fixing groove 14 aligns with the corresponding slot, so that the fastener 4 can pass through the fixing groove 14 and the slot in sequence and engage with the engaging parts 1411 and 1421 on the connecting housing 1. This design, through the engagement of the fastener 4, ensures a firm connection between the fan body and the connecting assembly, prevents loosening or falling off, and enhances the stability of the system.

[0026] In some embodiments, such as Figure 3 , Figure 5 and Figure 7 As shown, the fastener 4 includes elastic barbs 41 and 42, each with outward-facing limiting portions 4121 and 4221. When the fastener 4 is inserted into the slot, the elastic barbs deform elastically and spring back after reaching a preset position, causing the limiting portions to engage with the engaging portion of the connecting housing 1. The design of the elastic barbs 41 and 42 allows the fastener to smoothly enter the slot during insertion and automatically lock after reaching the preset position, providing a reliable fixing effect while facilitating disassembly and reinstallation.

[0027] Specifically, the fastener 4 includes a planar connecting portion 40, a first elastic barb portion 41, and a second elastic barb portion 42, which are located in the first insertion cavity 11 and the second insertion cavity 12 respectively, and are connected into an integral structure through the planar connecting portion 40. This design allows the fastener 4 to simultaneously fix the first fan body 20 and the second fan body 30, ensuring uniform force distribution and stable connection on both sides, and further enhancing the overall structural stability.

[0028] In some embodiments, such as Figures 4-7 As shown, both the first elastic barb portion 41 and the second elastic barb portion 42 include downward inclined surfaces 411 and 421 and upward inclined surfaces 412 and 422, with limiting portions 4121 and 4221 disposed at the ends of the upward inclined surfaces. Spring pieces 43 and 44 are connected to the ends of the upward inclined surfaces and can be elastically embedded into the spring piece receiving areas 141 and 142.

[0029] The downward-sloping surfaces 411 and 421 guide the latch 4 during insertion and provide initial positioning, while the upward-sloping surface provides the final locking function. The spring-loaded design enhances the stability of the latch, prevents it from loosening, and ensures long-term reliability.

[0030] In some embodiments, such as Figures 1-7 As shown, two fasteners 4 are symmetrically arranged on both sides of the connecting housing 1; each fastener extends from the outer wall of the connecting housing 1 toward the corresponding first insertion cavity 11 or second insertion cavity 12. The symmetrical arrangement of the two fasteners 4 ensures uniform force distribution, avoids structural failure caused by stress concentration on one side, and further enhances the stability of the overall structure.

[0031] In some embodiments, such as Figures 1-2 As shown, both the first fan body 20 and the second fan body 30 are thin-bladed fan blade segments. The outer edges of the first connecting part 200 and the second connecting part 300 are adapted to each other, and after splicing, they form a continuous and complete fan blade structure. This design not only simplifies the manufacturing process, but also ensures that the spliced ​​fan blades have good aerodynamic performance consistency, thereby improving the overall efficiency of the fan.

[0032] In some embodiments, such as Figure 3 , Figure 4 and Figure 7As shown, the surface of the connecting housing 1 is provided with four positioning holes 23 and 33. The connecting assembly 10 also includes two sets of first bolt structures 2 and two sets of second bolt structures 3. The positioning holes 23 and 3 are used to install the first bolt structures 2 and the second bolt structures 3. Specifically, the first connecting part 200 is provided with two first insertion holes 202, and the second connecting part 300 is provided with two second insertion holes 302. The first bolt structure 2 includes a first screw 21 and a first insert 22, and the second bolt structure 3 includes a second screw 31 and a second insert 32. The two sets of first bolt structures 2 are respectively inserted into the connecting housing 1 through the two positioning holes 23 and the first insertion holes 202 to extend into the first insertion cavity 11, and are threadedly connected or pressed into the first connecting part 200 of the first fan body 20; the two sets of second bolt structures 3 are respectively inserted into the connecting housing 1 through the two positioning holes 33 and the second insertion holes 302 to extend into the second insertion cavity 12, and are threadedly connected or pressed into the second connecting part 300 of the second fan body 30. The design of positioning holes 23 and 33, and first insertion holes 202 and second insertion holes 302 ensures precise installation of the bolt structure, improves assembly accuracy and connection strength, and further enhances the reliability and durability of the system. The use of two sets of first bolt structures 2 and two sets of second bolt structures 3 further strengthens the fixing strength between the connecting assembly and the fan body, providing additional safety and preventing loosening due to vibration or other external forces. The first positioning hole 23 and the second positioning hole 33 are located on one or both surfaces of the connecting housing 1 to guide the bolts to accurate alignment and improve assembly consistency. The structure of the first insert 22 and the second insert 32 is suitable for plastic fan blade bodies, effectively preventing thread wear caused by repeated disassembly and assembly, and extending service life.

[0033] The assembly steps of this application are as follows: First, align the first connecting portion 200 of the first fan body 20 with the first insertion cavity 11 of the connecting housing 1. Slowly push the first fan body 20 until its first connecting portion 200 is fully inserted into the first insertion cavity 11. Simultaneously, align the second connecting portion 300 of the second fan body 30 with the second insertion cavity 12 of the connecting housing 1. Slowly push the second fan body 30 until its second connecting portion 300 is fully inserted into the second insertion cavity 12. After the first connecting portion 200 of the first fan body 20 is fully inserted into the first insertion cavity 11, ensure that the fixing groove 14 on the connecting housing 1 is aligned with the first locking groove 201 on the first connecting portion 200. This step can be achieved through visual inspection or by using a positioning tool. Similarly, after the second connecting portion 300 of the second fan body 30 is fully inserted into the second insertion cavity 12, ensure that the fixing groove 14 on the connecting housing 1 is aligned with the second locking groove 301 on the second connecting portion 300.

[0034] Take out one fastener 4 and pass it sequentially through the fixing groove 14 on the connecting housing 1 and the first slot 201 on the first connecting part 200. During insertion, note that the elastic barbs 41 and 42 will elastically deform to adapt to the insertion path. When the fastener 4 reaches the preset position, the elastic barbs 41 and 42 will automatically spring back, causing the limiting parts 4121 and 4221 to engage with the engaging parts 1411 and 1421 on the connecting housing 1, achieving a secure lock. Repeat the above steps to pass another fastener 4 sequentially through the fixing groove 14 on the connecting housing 1 and the second slot 301 on the second connecting part 300, ensuring that the fastener 4 can also be securely locked in the second slot 301. The design of the fastener allows it to smoothly enter the slot during insertion and automatically lock after reaching the preset position, providing a reliable fixing effect while facilitating disassembly and reinstallation. If there are multiple fasteners, usually at least two, arrange them symmetrically on both sides of the connecting housing 1 according to the above steps, ensuring that each fastener extends from the outer wall of the connecting housing toward the corresponding first insertion cavity 11 or second insertion cavity 12, so as to achieve uniform force and stable connection.

[0035] The first insert 22 of the first bolt structure 2 is passed sequentially through the positioning hole 23 of the connecting housing 1 and the first insertion hole 202 of the first connecting part 200. Then, the first screw 21 is passed through the first insert 22 and the first insertion hole 202 and fixedly connected to the threaded hole at the bottom of the connecting housing 1 to achieve compression fixation. Similarly, the second insert 32 of the second bolt structure 3 is passed sequentially through the positioning hole 33 of the connecting housing 1 and the second insertion hole 302 of the second connecting part 300. Then, the second screw 31 is passed through the second insert 32 and the second insertion hole 302 and fixedly connected to the threaded hole at the bottom of the connecting housing 1 to achieve compression fixation.

[0036] Finally, check the overall assembly to confirm that all clips 4 are correctly installed and securely locked, and that the first fan body 20 and the second fan body 30 are reliably fixed within the connecting housing 1. Check for any signs of looseness or instability between components, and make minor adjustments or reinforcements if necessary. Functional test: Conduct a functional test to ensure that the overall structure after the fan blades are assembled has good aerodynamic performance consistency, and rotates smoothly without abnormal noise.

[0037] As can be seen from the above description, this application achieves the following technical effects through the implementation of a triple collaborative mechanism of "insertion limit + bolt main lock + snap-lock pre-positioning": First, efficient assembly: the snap-fit ​​structure enables quick pre-positioning, avoiding difficulties in aligning bolts with holes; Second, reliable connection: the double-sided bolt locking fit circumferential limiting structure has strong anti-vibration and anti-torsion capabilities; Third, stable operation: The symmetrical structural design ensures dynamic balance and reduces noise and vibration; Fourth, easy maintenance: The modular design supports the replacement of individual fan blade sections; Fifth, excellent aerodynamic performance: the snap-fit ​​design and smooth surface reduce wind resistance; Sixth, it has strong applicability: it can be adapted to fan blades made of various materials such as plastic and metal.

[0038] Therefore, this invention is particularly suitable for medium and large-sized fan products with high requirements for safety, stability and maintainability.

[0039] The above are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A type of spliced ​​fan blade, characterized in that, Including: The first fan body (20) has a first connecting part (200) at one end. The second fan body (30) has a second connecting part (300) at one end. Connection component (10), the connection component (10) includes: The connecting housing (1) has a first insertion cavity (11) and a second insertion cavity (12) with opposite directions inside. The first connecting part (200) is inserted into the first insertion cavity (11), and the second connecting part (300) is inserted into the second insertion cavity (12). At least one snap fastener (4) engages with the slots of the first connecting portion (200) and / or the second connecting portion (300) to restrict the first connecting portion (200) within the first insertion cavity (11) and / or to restrict the second connecting portion (300) within the second insertion cavity (12); simultaneously, the snap fastener (4) engages with the connecting housing (1) to achieve axial pre-positioning and / or radial auxiliary fixing between the first fan body (20) and / or the second fan body (30) and the connecting assembly (10).

2. The spliced ​​fan blades of the fan according to claim 1, characterized in that, The connecting housing (1) is provided with a fixing groove (14); The first connecting part (200) is provided with a first slot (201); when the first connecting part (200) is inserted into the first insertion cavity (11), the fixing groove (14) and the first slot (201) can be selectively aligned so that the fastener (4) can pass through the fixing groove (14) and the first slot (201) in sequence, and engage with the engaging part (1411, 1421) of the connecting housing (1), thereby achieving axial limiting and radial fixing.

3. The spliced ​​fan blades of the fan according to claim 2, characterized in that, The second connecting part (300) is provided with a second slot (301); when the second connecting part (300) is inserted into the second insertion cavity (12), the fixing groove (14) and the second slot (301) can be selectively aligned so that the fastener (4) can pass through the fixing groove (14) and the second slot (301) in sequence, and engage with the engaging part (1411, 1421) of the connecting housing (1), thereby achieving axial limiting and radial fixing.

4. The spliced ​​fan blades of the fan according to claim 3, characterized in that, The buckle (4) includes elastic barbs (41, 42), and the elastic barbs (41, 42) have limiting parts (4121, 4221). When the buckle (4) is inserted into the first slot (201) or the second slot (301), the elastic barb (41, 42) undergoes elastic deformation and rebounds after reaching the preset position, so that the limiting part (4121, 4221) engages with the engaging part (1411, 1421) of the connecting housing (1) to achieve a firm lock.

5. The spliced ​​fan blades of the fan according to claim 4, characterized in that, The buckle (4) includes a planar connecting part (40), a first elastic barb part (41) and a second elastic barb part (42). The first elastic barb part (41) and the second elastic barb part (42) are located in the first insertion cavity (11) and the second insertion cavity (12) respectively, and are connected into an integral structure through the planar connecting part (40) to achieve simultaneous fixation on both sides.

6. The spliced ​​fan blades of the fan according to claim 5, characterized in that, The fixing groove (14) is also provided with a spring clip receiving area (141, 142). Both the first elastic barb portion (41) and the second elastic barb portion (42) include: The downward inclined surfaces (411, 421) are connected to the planar connecting portion (40) and inclined downwards; the combined action of the planar connecting portion (40), the downward inclined surfaces (411, 421) and the partition plate (13) axially limits the first connecting portion (200) within the first insertion cavity (11); and / or axially limits the second connecting portion (300) within the second insertion cavity (12); An upward inclined surface (412, 422) is connected to the downward inclined surface (411, 421) and tilts upward. The limiting part (4121, 4221) is disposed at the end of the upward inclined surface (412, 422). At least part of the downward inclined surface (411) and the upward inclined surface (412) of the first elastic barb part (41) are engaged in the first slot (201). At least part of the downward inclined surface (421) and the upward inclined surface (422) of the second elastic barb part (42) are engaged in the second slot (301). The spring pieces (43, 44) are connected to the ends of the upward inclined surfaces (412, 422). The spring pieces (43, 44) can be elastically embedded in the spring piece receiving area (141, 142) so that the limiting part (4121, 4221) engages with the engaging part (1411, 1421).

7. The spliced ​​fan blades of the fan according to claim 3, characterized in that, At least two fasteners (4) are provided, symmetrically arranged on both sides of the connecting housing (1), and each fastener (4) extends from the outer wall of the connecting housing (1) toward the corresponding first insertion cavity (11) and / or second insertion cavity (12).

8. The spliced ​​fan blades of the fan according to claim 1 or 2, characterized in that, Both the first fan body (20) and the second fan body (30) are thin-plate fan blade segments. The outer edge of the first connecting part (200) is adapted to the outer edge of the second connecting part (300), and after splicing, they form a continuous and extended complete fan blade structure.

9. The spliced ​​fan blades of the fan according to claim 1, characterized in that, The connection component (10) further includes: At least one set of first bolt structures (2) passes through the connecting housing (1) and extends into the first insertion cavity (11), and is threadedly connected or press-fitted with the first connecting portion (200) of the first fan body (20) to lock and fix the first connecting portion (200) of the first fan body (20) in the first insertion cavity (11); and / or At least one set of second bolt structures (3) are inserted through the connecting housing (1) and into the second insertion cavity (12), and are threaded or pressed into the second connecting part (300) of the second fan body (30) to lock and fix the second connecting part (300) of the second fan body (30) in the second insertion cavity (12).

10. The spliced ​​fan blades of the fan according to claim 9, characterized in that, The connecting housing (1) has a plurality of positioning holes (23, 33) on one side surface for fitting and installing the first bolt structure (2) and / or the second bolt structure (3). The first connecting part (200) is provided with a first insertion hole (202); The first bolt structure (2) includes a first screw (21) and a first insert (22). The first insert (22) passes through the positioning hole (23) and the first insertion hole (202) in sequence. The first screw (21) passes through the first insert (22), the first insertion hole (202), and is fixedly connected to the threaded hole below the connecting housing (1) to press and fix the first connecting part (200); and / or The second connecting part (300) is provided with a second insertion hole (302); The second bolt structure (3) includes a second screw (31) and a second insert (32). The second insert (32) passes through the positioning hole (23) and the second insertion hole (302) in sequence. The second screw (31) passes through the second insert (32) and the second insertion hole (302) and is fixedly connected to the lower threaded hole of the connecting housing (1) to press and fix the second connecting part (300).

Images