Fan blade structure positioned through buckles

Abstract

The utility model discloses a buckle positioning fan blade structure which comprises a fan disc and a plurality of fan blades, a connecting insertion cavity is formed in the side wall of the fan disc, and vertical insertion grooves are formed in the symmetrical side walls of the connecting insertion cavity; a limiting clamping groove is formed in the inner wall of the connecting insertion cavity; connecting inserting blocks matched with the connecting inserting cavities are integrally formed at the ends of the fan blades. Vertical inserting strips are arranged on the symmetrical edges of the connecting inserting block, and abutting and buckling protrusions are integrally formed on the surface of the connecting inserting block. The connecting inserting blocks are inserted into the connecting inserting cavities, the vertical inserting strips are inserted into the vertical inserting grooves in a clamped mode, and the limiting protrusions are clamped into the limiting clamping grooves for positioning. The fan blade connecting piece is reasonable in structural arrangement, when the fan blade connecting piece is clamped into a connecting inserting block of a fan blade, limiting can be achieved through matching of the vertical inserting strips and the vertical inserting grooves, positioning is achieved through matching of the abutting-buckling protrusions and the limiting clamping grooves, stability and reliability of connection are guaranteed, disassembly, assembly and maintenance operation is convenient, the disassembly, assembly and maintenance cost is reduced, and the service life of the fan blade connecting piece is prolonged. And the convenience and effectiveness of disassembly and assembly are improved.

Description

Technical Field

[0001] This utility model belongs to the field of fan component technology, specifically relating to a snap-locking fan blade structure. Background Technology

[0002] A fan is a common air-blowing structure, which generally includes a motor, a fan disc fixed on the motor shaft, and fan blades fixed on the fan disc. In the prior art, the fan blades are mostly integrally formed with the fan disc, as shown in CN201920452372.6, where the fan blade 5 includes a fan hub 51 and multiple blades 52 disposed on the side wall of the fan hub; as can be seen from the accompanying drawings in the specification, the two are integrally formed. In some cases, the fan blades and the fan disc are fixed with screws, such as the connecting plate 4 described in CN202121470462.1, which is provided with at least three pieces and connected to the through holes of the fan blade 1 by screws. The connecting plate 4 and the central turntable 5 are integrally formed.

[0003] While the above structure can meet general usage needs, it also has certain technical shortcomings. It is inconvenient to disassemble, assemble, maintain, or replace the structure, and it also affects the difficulty and efficiency of assembly, thus limiting its applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a snap-on positioning fan blade structure with a reasonable structural design and convenient assembly and disassembly.

[0005] The technical solution to achieve the purpose of this utility model is a snap-on positioning fan blade structure, including a fan disk and several fan blades. Several connecting cavities with top and outer side openings are opened on the side wall of the fan disk, and vertical slots are provided on the symmetrical side walls of the connecting cavities.

[0006] At least one limiting slot is provided on the inner wall of the connecting cavity;

[0007] The end of the fan blade is integrally formed with a connecting plug that mates with the connecting cavity;

[0008] The connecting plug has vertical inserts along its symmetrical edges that mate with the vertical slot, and the surface of the connecting plug is integrally formed with a buckling protrusion that mates with the limiting slot.

[0009] The connecting plug is inserted into the connecting cavity, the vertical insert is inserted into the vertical slot, and the limiting protrusion is positioned by being engaged in the limiting slot.

[0010] A further preferred embodiment is that the limiting groove is an inclined groove with a large top depth and a small bottom depth.

[0011] A further preferred embodiment is that the buckling protrusion is a triangular protrusion with a thickness at the upper end greater than that at the lower end.

[0012] A further preferred embodiment is that the thickness of the upper end of the vertical insert is greater than the thickness of the lower end.

[0013] A further preferred embodiment is that the connecting plug has a cavity with an opening at the bottom.

[0014] A further preferred embodiment is that the top surface of the fan disc is provided with a plurality of mounting holes, which are located between adjacent connecting cavities.

[0015] A further preferred embodiment is that the height of the connecting plug is matched with the height of the connecting cavity;

[0016] The connecting plug is inserted into the connecting cavity, and the top surface of the connecting plug is flush with the top surface of the fan plate.

[0017] A further preferred embodiment is that the top surface of the fan disc has an integrally formed frustum-shaped protrusion, and the center of the frustum-shaped protrusion has a mounting shaft hole for connecting the motor spindle.

[0018] A further preferred embodiment is that the number of connecting cavities is three or four.

[0019] A further preferred embodiment is that the fan disc, fan blades, and connecting block are all plastic structures.

[0020] This utility model has positive effects: The structure of this utility model is reasonably designed. It has several connecting cavities on the side wall of the fan disc, and is equipped with vertical slots and limiting slots. When the connecting block is inserted with the fan blade, it can be limited by the vertical insert and the vertical slot, and positioned by the buckling protrusion and the limiting slot. This not only ensures the stability and reliability of the connection, but also facilitates disassembly and maintenance, reduces the cost of disassembly and maintenance, and improves the convenience and effectiveness of disassembly and assembly. It has strong applicability. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of a fan blade when disassembled in this utility model;

[0024] Figure 3 This is a schematic diagram of the specific structure of the fan disc in this utility model;

[0025] Figure 4 This is a schematic diagram of the specific structure of the fan blades in this utility model;

[0026] Figure 5 for Figure 4 Another perspective on the structure diagram.

[0027] Reference numerals: 1. Fan plate; 2. Fan blade; 3. Connecting cavity; 4. Vertical slot; 5. Limiting slot; 6. Connecting block; 7. Vertical insert; 8. Buckling protrusion; 9. Cavity; 10. Mounting hole; 11. Frustum-shaped protrusion; 12. Mounting shaft hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example

[0030] See Figures 1 to 5 As shown, a snap-fit ​​fan blade structure includes a fan disc 1 and several fan blades 2, wherein the fan disc, fan blades, and connecting block are all plastic structures. Several connecting cavities 3 with top and outer surface openings are provided on the side wall of the fan disc, and vertical slots 4 are provided on the symmetrical side walls of the connecting cavities. In this embodiment, the bottom wall of the connecting cavity is not open, which can support the bottom surface of the connecting block and prevent the fan blades from falling downwards.

[0031] Furthermore, in this embodiment, the width of the connecting cavity can be processed and set as needed, specifically to match the overall width of the fan blades.

[0032] Furthermore, at least one limiting slot 5 is provided on the inner wall of the connecting cavity; the number of limiting slots can be processed and set as needed. In this embodiment, there is one limiting slot, but in actual application, there can be two or more, mainly to cooperate with the vertical slot to complete the positioning of the fan blades.

[0033] In this embodiment, the end of the fan blade is integrally formed with a connecting block 6 that mates with the connecting cavity; simultaneously, the height of the connecting block matches the height of the connecting cavity; the connecting block snaps into the connecting cavity, and the top surface of the connecting block is flush with the top surface of the fan disc. This improves the aesthetics of the assembly.

[0034] The connecting plug has vertical inserts 7 along its symmetrical edges that mate with the vertical slot, and the surface of the connecting plug is integrally formed with a locking protrusion 8 that mates with the limiting groove. During assembly, the connecting plug is inserted into the connecting cavity, the vertical inserts are inserted into the vertical slot, and the limiting protrusion is positioned within the limiting groove. The mounting surface of the connecting plug is arc-shaped, matching the shape of the end wall of the connecting cavity. In this embodiment, the limiting groove is an inclined groove with a greater depth at the top and a smaller depth at the bottom. The locking protrusion is a triangular protrusion with a greater thickness at the top than at the bottom.

[0035] The above structure ensures the stability and reliability of the snap-fit ​​connection, preventing upward loosening or detachment. Furthermore, the upper thickness of the vertical insert is greater than the lower thickness. The upper end of the vertical insert is slightly smaller than the width of the vertical slot. In practical applications, this structure allows the upper part of the vertical insert to move outward within the vertical slot by a gap under external force, facilitating the separation of the snap-fit ​​protrusion from the limiting groove. In actual operation, the vertical insert can be pried outward by external force, causing the lower part to move inward and the upper part to move outward. Through the deformation of the sidewall of the vertical slot and the gap between the two, the snap-fit ​​protrusion can detach from the limiting groove. When the external force disappears, the vertical insert, positioned in the vertical slot, will cause the snap-fit ​​protrusion to engage with the limiting groove, preventing loosening or detachment.

[0036] In this embodiment, the connecting plug has a cavity 9 with an open bottom surface. When the cavity is disassembled, external force will pry the upper part of the connecting plug outward, which will also slightly deform the side wall of the cavity. At the same time, it will also slightly deform the side wall of the limiting slot, so that the buckling protrusion can be disengaged from the limiting slot. This makes it easy for the buckling protrusion to disengage from the limiting slot, and then the fan blade can be pulled out upward. When there is no external force, the reliability of the connection between the buckling protrusion and the limiting slot can be guaranteed, and it will not loosen or fall off.

[0037] In this embodiment, the top surface of the fan disk is provided with a plurality of mounting holes 10, which are located between adjacent connecting cavities.

[0038] Furthermore, in this embodiment, a frustum-shaped protrusion 11 is integrally formed at the center of the top surface of the fan disk, and a mounting shaft hole 12 for connecting the motor spindle is provided at the center of the frustum-shaped protrusion. This is for connecting with the motor spindle of the fan, which is a conventional structure in the prior art.

[0039] In this embodiment, the number of connecting cavities is three or four.

[0040] This utility model has positive effects: The structure of this utility model is reasonably designed. It has several connecting cavities on the side wall of the fan disc, and is equipped with vertical slots and limiting slots. When the connecting block is inserted with the fan blade, it can be limited by the vertical insert and the vertical slot, and positioned by the buckling protrusion and the limiting slot. This not only ensures the stability and reliability of the connection, but also facilitates disassembly and maintenance, reduces the cost of disassembly and maintenance, and improves the convenience and effectiveness of disassembly and assembly. It has strong applicability.

[0041] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0042] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A snap-fit ​​fan blade structure, comprising a fan disc and a plurality of fan blades, characterized in that: The fan disc has several connecting cavities with openings on the top and outer sides, and vertical slots are provided on the symmetrical sidewalls of the connecting cavities. At least one limiting slot is provided on the inner wall of the connecting cavity; The end of the fan blade is integrally formed with a connecting plug that mates with the connecting cavity; The connecting plug has vertical inserts along its symmetrical edges that mate with the vertical slot, and the surface of the connecting plug is integrally formed with a buckling protrusion that mates with the limiting slot. The connecting plug is inserted into the connecting cavity, the vertical insert is inserted into the vertical slot, and the limiting protrusion is positioned by being engaged in the limiting slot.

2. The fan blade structure with snap-fit ​​positioning according to claim 1, characterized in that: The limiting slot is an inclined slot with a large top depth and a small bottom depth.

3. The fan blade structure with snap-fit ​​positioning according to claim 2, characterized in that: The buckling protrusion is a triangular protrusion with a thickness at the upper end greater than that at the lower end.

4. The fan blade structure with snap-fit ​​positioning according to claim 1, characterized in that: The thickness of the upper end of the vertical insert is greater than the thickness of the lower end.

5. The fan blade structure with snap-fit ​​positioning according to claim 1, characterized in that: The connecting plug has a cavity with an opening on the bottom surface.

6. The fan blade structure with snap-fit ​​positioning according to claim 1, characterized in that: The top surface of the fan disc is provided with a number of mounting holes, which are located between adjacent connecting cavities.

7. The fan blade structure with snap-fit ​​positioning according to claim 1, characterized in that: The height of the connecting plug is matched with the height of the connecting cavity; The connecting plug is inserted into the connecting cavity, and the top surface of the connecting plug is flush with the top surface of the fan plate.

8. The fan blade structure with snap-fit ​​positioning according to claim 1, characterized in that: The top surface of the fan disc has an integrally formed frustum-shaped protrusion, and the center of the frustum-shaped protrusion has a mounting shaft hole for connecting the motor spindle.

9. The fan blade structure with snap-fit ​​positioning according to claim 1, characterized in that: The number of connecting cavities is three or four.

10. A snap-fit ​​positioning fan blade structure according to claim 1, characterized in that: The fan disc, fan blades, and connecting blocks are all plastic structures.

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