Axial flow fan blade

Abstract

The utility model discloses an axial flow fan blade which comprises an impeller and a blade body fixedly connected to the surface of the impeller, a shaft rod is connected to the inner surface of the impeller in an inserted mode, connecting plates are arranged on the front face and the back face of the impeller, the number of the connecting plates is multiple, and the connecting plates evenly surround the outer side of the shaft rod. Clamping jaws are fixedly connected to the sides, close to the shaft rod, of the connecting plates, the sides, away from the connecting plates, of the clamping jaws make contact with the outer surface of the shaft rod, fixing structures located on the outer sides of the connecting plates are arranged on the surface of the shaft rod, and the fixing structures can push the connecting plates to synchronously move towards the ends close to the shaft rod. By means of the structure of the connecting plates and the clamping jaws, tight connection of the axial flow fan blade and the shaft rod is achieved, the fixing structure can push the connecting plates to move synchronously, and therefore stable installation of the blade on the shaft rod is guaranteed, reliability and stability of the axial flow fan blade are improved, and faults caused by loosening or falling off are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fan blades, in particular to an axial flow fan blade. Background Art

[0002] Axial fan blades are the key components of axial flow fans. Their main function is to push air or gas to flow along the axial direction. Axial fan blades are made of a variety of materials to meet different environmental and application requirements. The rotation of the blades can push the air flow, thereby generating wind volume. When the blades push the air flow, a certain pressure difference will be generated, namely the wind pressure.

[0003] For example, the patent application number published on the China Patent Network is 202022208115.3, and the patent title is: "Axial-flow fan impeller, comprising an impeller hub and a plurality of blades distributed outside the impeller hub; the impeller hub has a plurality of ventilation holes distributed along its axis; the ventilation holes extend along the axis of the impeller hub." This utility model effectively solves the problem of insufficient rigidity of injection-molded impeller blades, while also addressing the difficulties of motor heat dissipation and use in high humidity conditions, and has good applicability.

[0004] However, the existing connection method between fan blades and shafts is relatively simple, and the inner diameter of the fan blades is fixed, resulting in shafts of different sizes being unable to be effectively connected to the blades, seriously affecting the applicability of the fan blades and unable to meet the usage requirements of different equipment in different environments.

[0005] Therefore, it is necessary to redesign the axial fan blades. Utility Model Content

[0006] In order to solve the problems raised in the above-mentioned background technology, the purpose of the present invention is to provide an axial flow fan blade, which has the advantage of improving connection adaptability, and solves the problem that the connection method between the existing fan blade and the shaft is relatively single, and the inner diameter size of the fan blade is fixed, resulting in shafts of different sizes unable to be effectively connected to the blade, seriously affecting the application scope of the fan blade and unable to meet the use requirements of different equipment in different environments.

[0007] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: an axial flow fan blade, comprising an impeller;

[0008] Blades fixedly connected to the surface of the impeller;

[0009] A shaft is inserted into the inner surface of the impeller, and connecting plates are provided on the front and back of the impeller. There are several connecting plates that are evenly surrounded on the outside of the shaft. A claw is fixedly connected to the side of the connecting plate close to the shaft, and the side of the claw away from the connecting plate is in contact with the outer surface of the shaft. The surface of the shaft is provided with a fixing structure located on the outside of the connecting plate, and the fixing structure can push multiple connecting plates to move synchronously toward one end close to the shaft.

[0010] As a preferred embodiment of the present invention, the fixing structure includes a conical ring sleeved on the surface of the shaft rod, the inner surface of the conical ring is set to an inclined shape, the outer side of the connecting plate is fixedly connected with a force plate, and the side of the force plate away from the connecting plate is fixedly connected to the outer side of the claw. During the process of the conical ring moving inward, the force plate can be used to squeeze the connecting plate to move inward.

[0011] As a preferred embodiment of the present invention, a limiting groove is provided on the surface of the connecting plate, and the front and back sides of the impeller are both threadedly connected with bolts located inside the limiting groove, and the bolts are slidably connected to the limiting groove.

[0012] As a preferred embodiment of the present invention, the front end and the rear end of the shaft surface are both threadedly connected with screw sleeves, and the screw sleeves are located outside the conical ring. During the rotation process, the screw sleeves can squeeze the conical ring to move it inward.

[0013] As a preferred embodiment of the present invention, support plates are fixedly connected to both sides of the connecting plate, and a side of the support plate away from the connecting plate is fixedly connected to the outer side of the load-bearing plate.

[0014] As a preferred embodiment of the present invention, a rubber pad is fixedly connected to the inner surface of the clamping claw, and the side of the rubber pad away from the clamping claw is in contact with the surface of the shaft, and the rubber pad is elastic.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The utility model realizes a tight connection between the axial flow fan blades and the shaft through the structure of the connecting plate and the claws. The fixing structure can push the connecting plate to move synchronously, thereby ensuring the stable installation of the blades on the shaft, improving the reliability and stability of the axial flow fan blades, and reducing failures caused by loosening or falling off.

[0017] 2. The utility model uses the design of the conical ring to enable the fixed structure to distribute force more evenly. The force-bearing plate squeezes the connecting plate to achieve close contact between the connecting plate and the shaft rod, which not only improves the stability of the connection, but also reduces the risk of deformation or damage of the connecting plate due to uneven force distribution.

[0018] 3. The utility model provides additional fixation and support for the connecting plate through the design of the limit groove and the bolt, thereby preventing the connecting plate from displacement or deformation when subjected to force, thereby enhancing the overall structural strength of the axial flow fan blade and improving its durability and service life.

[0019] 4. The utility model makes the adjustment of the fixing structure simpler and more convenient through the design of the screw sleeve. By rotating the screw sleeve, the movement of the conical ring can be easily controlled, thereby achieving a tight fixation of the connecting plate and the claw, thereby improving the installation efficiency and reliability of the axial flow fan blades.

[0020] 5. The support plate design of this utility model provides additional support and fixation for the load-bearing plate, enhancing its stability. This allows the load-bearing plate to better transmit force when squeezed by the conical ring, ensuring close contact between the connecting plate and the shaft. Furthermore, the support plate improves the overall structural strength of the axial fan blades.

[0021] 6. The utility model reduces the friction and wear between the claws and the shaft through the design of the rubber pad, thereby improving the durability and service life of the connection. At the same time, the elasticity of the rubber pad can also absorb a certain amount of vibration and impact force, thereby improving the stability and reliability of the axial flow fan blades. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the separation structure of the utility model;

[0025] Figure 4 For this utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0026] In the figure: 1. Impeller; 2. Blades; 3. Shaft; 4. Connecting plate; 5. Claw; 6. Fixing structure; 7. Conical ring; 8. Load plate; 9. Limiting groove; 10. Bolt; 11. Screw sleeve; 12. Support plate; 13. Rubber pad. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figures 1 to 4 As shown, the utility model provides an axial flow fan blade, including an impeller 1;

[0029] Blades 2 fixedly connected to the surface of the impeller 1;

[0030] A shaft 3 is inserted into the inner surface of the impeller 1, and connecting plates 4 are provided on the front and back of the impeller 1. There are several connecting plates 4 that are evenly surrounded on the outside of the shaft 3. A claw 5 is fixedly connected to the side of the connecting plate 4 close to the shaft 3, and the side of the claw 5 away from the connecting plate 4 is in contact with the outer surface of the shaft 3. A fixing structure 6 located on the outside of the connecting plate 4 is provided on the surface of the shaft 3. The fixing structure 6 can push multiple connecting plates 4 to move synchronously toward one end close to the shaft 3.

[0031] refer to Figure 3 The fixing structure 6 includes a conical ring 7 sleeved on the surface of the shaft 3. The inner surface of the conical ring 7 is set to an inclined shape. The outer side of the connecting plate 4 is fixedly connected with a force plate 8. The side of the force plate 8 away from the connecting plate 4 is fixedly connected to the outer side of the claw 5. During the movement of the conical ring 7 inward, the force plate 8 can be used to squeeze the connecting plate 4 to move inward.

[0032] As a technical optimization solution of the present invention, the design of the conical ring 7 enables the fixing structure 6 to distribute force more evenly, and the connecting plate 4 is squeezed by the force-bearing plate 8 to achieve close contact between the connecting plate 4 and the shaft 3, which not only improves the stability of the connection, but also reduces the risk of deformation or damage of the connecting plate 4 due to uneven force distribution.

[0033] refer to Figure 4 A limiting groove 9 is provided on the surface of the connecting plate 4, and the front and back sides of the impeller 1 are both threadedly connected with bolts 10 located inside the limiting groove 9, and the bolts 10 are slidably connected to the limiting groove 9.

[0034] As a technical optimization solution of the present invention, the design of the limit groove 9 and the bolt 10 provides additional fixation and support for the connecting plate 4, preventing the connecting plate 4 from displacement or deformation when subjected to force, thereby enhancing the overall structural strength of the axial flow fan blades and improving their durability and service life.

[0035] refer to Figure 3 The front and rear ends of the surface of the shaft 3 are both threadedly connected with a screw sleeve 11, and the screw sleeve 11 is located on the outside of the conical ring 7. During the rotation process, the screw sleeve 11 can squeeze the conical ring 7 to move it inward.

[0036] As a technical optimization solution of the present invention, the design of the screw sleeve 11 makes the adjustment of the fixing structure 6 simpler and more convenient. By rotating the screw sleeve 11, the movement of the conical ring 7 can be easily controlled, thereby achieving tight fixation of the connecting plate 4 and the claw 5, thereby improving the installation efficiency and reliability of the axial flow fan blades.

[0037] refer to Figure 4 , support plates 12 are fixedly connected to both sides of the connecting plate 4, and the side of the support plate 12 away from the connecting plate 4 is fixedly connected to the outer side of the force-bearing plate 8.

[0038] As a technical optimization solution of the present invention, the design of the support plate 12 provides additional support and fixation for the load-bearing plate 8, thereby enhancing the stability of the load-bearing plate 8. This allows the load-bearing plate 8 to better transmit force when squeezed by the conical ring 7, ensuring close contact between the connecting plate 4 and the shaft 3. At the same time, the support plate 12 also improves the overall structural strength of the axial flow fan blade.

[0039] refer to Figure 4 The inner surface of the claw 5 is fixedly connected with a rubber pad 13, and the side of the rubber pad 13 away from the claw 5 is in contact with the surface of the shaft 3, and the rubber pad 13 is elastic.

[0040] As a technical optimization solution of the present invention, the design of the rubber pad 13 reduces the friction and wear between the claw 5 and the shaft 3, thereby improving the durability and service life of the connection. At the same time, the elasticity of the rubber pad 13 can also absorb certain vibrations and impact forces, thereby improving the stability and reliability of the axial flow fan blades.

[0041] The working principle and use process of the present invention: the axial flow fan blades are composed of an impeller 1 and blades 2 fixedly connected to the surface of the impeller 1. The inner surface of the impeller 1 is reserved with a space for inserting the shaft 3. The shaft 3 is inserted from the inner surface of the impeller 1 until the shaft 3 completely passes through the impeller 1, and its two ends extend out of the impeller 1. As the shaft 3 is inserted, the claws 5 on the connecting plate 4 begin to contact the outer surface of the shaft 3. Since the inner surface of the claws 5 is fixed with a rubber pad 13, the elasticity of the rubber pad 13 ensures close contact between the claws 5 and the shaft 3, while reducing wear. The conical ring 7 is sleeved on the shaft 3 and is located on the outer side of the connecting plate 4. The inner surface of the conical ring 7 is set to an inclined shape so that this feature can be used for fixation in subsequent steps. The front and rear ends are respectively threadedly connected to the screw sleeve 11, which is located on the outside of the tapered ring 7 and is designed with a structure that can rotate and squeeze the tapered ring 7. By rotating the screw sleeve 11, the screw sleeve 11 moves inward and squeezes the tapered ring 7, so that the inclined inner surface of the tapered ring 7 contacts the force-bearing plate 8. As the tapered ring 7 is squeezed inward by the screw sleeve 11, the inclined inner surface of the tapered ring 7 contacts the force-bearing plate 8 and generates thrust. The force-bearing plate 8 is fixedly connected to the outside of the connecting plate 4. Therefore, the thrust will cause the force-bearing plate 8 to squeeze the connecting plate 4, so that the connecting plate 4 and the claws 5 thereon move synchronously toward one end close to the shaft rod 3. When the connecting plate 4 and the claws 5 thereon move to a position close enough to the shaft rod 3, the close contact between the claws 5 and the shaft rod 3 achieves the desired fixing effect.

[0042] To sum up: the axial flow fan blade, through the structure of the connecting plate 4 and the claw 5, realizes a tight connection between the axial flow fan blade and the shaft 3. The fixing structure 6 can push the connecting plate 4 to move synchronously, thereby ensuring the firm installation of the blade 2 on the shaft 3, improving the reliability and stability of the axial flow fan blade, and reducing failures caused by loosening or falling off.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An axial flow fan blade, comprising an impeller (1); Blades (2) fixedly connected to the surface of the impeller (1); Its characteristics are: The inner surface of the impeller (1) is plugged with a shaft (3), and the front and back surfaces of the impeller (1) are both provided with connecting plates (4). The number of the connecting plates (4) is several and they are evenly surrounded on the outside of the shaft (3). The side of the connecting plate (4) close to the shaft (3) is fixedly connected with a claw (5), and the side of the claw (5) away from the connecting plate (4) contacts the outer surface of the shaft (3). The surface of the shaft (3) is provided with a fixing structure (6) located on the outside of the connecting plate (4), and the fixing structure (6) can push the multiple connecting plates (4) to move synchronously toward one end close to the shaft (3).

2. The axial flow fan blade according to claim 1, characterized in that: The fixing structure (6) includes a conical ring (7) sleeved on the surface of the shaft (3), the inner surface of the conical ring (7) is arranged to be inclined, the outer side of the connecting plate (4) is fixedly connected to a force-bearing plate (8), and the side of the force-bearing plate (8) away from the connecting plate (4) is fixedly connected to the outer side of the claw (5). When the conical ring (7) moves inward, the force-bearing plate (8) can be used to squeeze the connecting plate (4) to move inward.

3. The axial flow fan blade according to claim 1, characterized in that: A limiting groove (9) is provided on the surface of the connecting plate (4), and the front and back surfaces of the impeller (1) are both threadedly connected with bolts (10) located inside the limiting groove (9), and the bolts (10) are slidably connected to the limiting groove (9).

4. The axial flow fan blade according to claim 1, characterized in that: The front end and the rear end of the surface of the shaft (3) are both threadedly connected with screw sleeves (11), and the screw sleeve (11) is located outside the conical ring (7). During the rotation process, the screw sleeve (11) can squeeze the conical ring (7) to move it inward.

5. The axial flow fan blade according to claim 1, characterized in that: Support plates (12) are fixedly connected to both sides of the connecting plate (4), and a side of the support plate (12) away from the connecting plate (4) is fixedly connected to the outer side of the load-bearing plate (8).

6. The axial flow fan blade according to claim 1, characterized in that: A rubber pad (13) is fixedly connected to the inner surface of the clamping claw (5), and the side of the rubber pad (13) away from the clamping claw (5) contacts the surface of the shaft (3), and the rubber pad (13) is elastic.

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