Composite fan blade and fan device

Abstract

The utility model discloses a combined type fan blade and a fan device. The combined type fan blade comprises a metal piece and a plastic piece. The metal piece comprises a combination part and a plurality of blade parts. The blade parts are connected to the periphery of the joint part. The plastic part is cylindrical, and at least part of the plastic part is combined with the combination part of the metal part, so that the combination part of the metal part and the plastic part jointly form a hub structure. Wherein the combining part comprises a substrate and a plurality of connecting plates; the connecting plates are respectively connected to the periphery of the substrate and are arranged at intervals, and a notch is formed between any two adjacent connecting plates. Each connecting plate is provided with an inner side face, an outer side face and a groove. The outer side faces are opposite to the inner side faces. The blade parts protrude out of the outer side faces of the connecting plates respectively. The grooves are located in the inner side faces respectively. The plastic part is at least partially combined with the grooves.

Description

Technical Field

[0001] This utility model relates to a composite fan blade and fan device, and more particularly to a composite fan blade and fan device with a hub structure made of composite materials. Background Technology

[0002] With the rapid development of technology, the computing power of processors has increased significantly, but it also generates a lot of heat. To ensure that the processor is not damaged by high heat, fans need to be installed in electronic products to dissipate the excessive heat from the processor, so that the processor can operate within a certain operating temperature range.

[0003] However, when a fan is running, the rotating blades vibrate and generate noise. At certain speeds, the noise from the blade vibrations can be excessive, thus ruining the user experience when using electronic products. Therefore, reducing the noise generated by the fan blades during operation is one of the problems that researchers need to solve. Utility Model Content

[0004] The present invention provides a composite fan blade and fan device to reduce the noise generated by the fan blade during operation.

[0005] An embodiment of this utility model discloses a composite fan blade comprising a metal component and a plastic component. The metal component includes a connecting portion and a plurality of blade portions. These blade portions are connected around the connecting portion. The plastic component is cylindrical and at least partially connected to the connecting portion of the metal component, such that the connecting portion of the metal component and the plastic component together form a hub structure. The connecting portion includes a base plate and a plurality of connecting plates. These connecting plates are respectively connected to the periphery of the base plate and are spaced apart, forming a notch between any two adjacent connecting plates. Each connecting plate has an inner surface, an outer surface, and a groove. These outer surfaces face away from the inner surfaces. The blade portions protrude from the outer surfaces of these connecting plates. These grooves are located on these inner surfaces. The plastic component is at least partially connected to these grooves.

[0006] In the aforementioned composite fan blade, the substrate of the joint portion has a plurality of recessed recesses, which respectively correspond to the notches.

[0007] The aforementioned composite fan blade is formed by a combination of forging and computer numerical control machining processes.

[0008] In the aforementioned composite fan blade, the metal part and the plastic part are joined by injection molding, bonding, or riveting.

[0009] In the aforementioned composite fan blade, the metal component further includes an outer ring portion connected to the side of the blade portions away from the joint portion and surrounding the blade portions.

[0010] Another embodiment of this utility model discloses a fan device comprising a fixed frame, a composite fan blade, and a drive element. The composite fan blade is rotatably mounted on the fixed frame and includes a metal part and a plastic part. The metal part includes a connecting portion and a plurality of blade portions. These blade portions are connected around the connecting portion. The plastic part is cylindrical and is at least partially connected to the connecting portion of the metal part, such that the connecting portion of the metal part and the plastic part together form a hub structure. The drive element is mounted on the fixed frame and is used to drive the composite fan blade to rotate relative to the fixed frame. The connecting portion includes a base plate and a plurality of connecting plates. These connecting plates are respectively connected to the periphery of the base plate and are spaced apart, forming a notch between any two adjacent connecting plates. Each of these connecting plates has an inner surface, an outer surface, and a groove. These outer surfaces face away from these inner surfaces. These blade portions protrude from these outer surfaces of these connecting plates. These grooves are located on these inner surfaces. The plastic part is at least partially connected to these grooves.

[0011] In the aforementioned fan device, the substrate of the joint portion has a plurality of recessed recesses, which respectively correspond to the notches.

[0012] In the aforementioned fan device, the metal part is formed through a forging process and a computer numerical control machining process.

[0013] In the aforementioned fan device, the metal part and the plastic part are joined by injection molding, bonding, or riveting.

[0014] In the aforementioned fan device, the metal component further includes an outer ring portion connected to the side of the blade portions away from the joint portion and surrounding the blade portions.

[0015] According to the composite fan blade and fan device of the above embodiment, since the composite fan blade is made of a combination of metal and plastic parts, compared with fan blades made of ordinary plastic or other single materials, the composite fan blade of this embodiment can absorb sound or dampen vibration to reduce noise generated during operation. Furthermore, since a gap is formed between any two adjacent connecting plates, magnetic conduction between the metal parts and the drive element can be avoided, further reducing noise generated during the operation of the composite fan blade. This provides users with a more comfortable experience when using electronic products.

[0016] The above description of the present utility model and the following description of the embodiments are used to demonstrate and explain the principle of the present utility model, and to provide a further explanation of the scope of the patent application of the present utility model. Attached Figure Description

[0017] Figure 1 This is a perspective view of the fan device according to the first embodiment of the present invention.

[0018] Figure 2 for Figure 1 An exploded view of the fan assembly.

[0019] Figure 3 This is a perspective view of the fan device according to the second embodiment of the present invention.

[0020] Figure 4 for Figure 3 An exploded view of the fan assembly.

[0021] In the attached figures, the following labels are used:

[0022] 10,10A: Fan assembly

[0023] 20: Fixture

[0024] 30, 30A: Composite fan blades

[0025] 31, 31A: Metal parts

[0026] 311, 311A: Joint

[0027] 3111,3111A:Substrate

[0028] 31111: Give way to the concave part

[0029] 3111A1: Annular groove

[0030] 3112: Connecting plate

[0031] 31121: Inner side

[0032] 31122: Outer side

[0033] 31123: Groove

[0034] 312: Blade section

[0035] 313A: Outer Ring Road

[0036] 32, 32A: Plastic parts

[0037] 321: Annular groove

[0038] 40: Driving element

[0039] N: Gap Detailed Implementation

[0040] Please see Figure 1 and Figure 2 . Figure 1 This is a perspective view of the fan device according to the first embodiment of the present invention. Figure 2 for Figure 1An exploded view of the fan assembly.

[0041] The fan device 10 of this embodiment includes a fixed frame 20, a compound fan blade 30, and a drive element 40. The compound fan blade 30 is rotatably mounted on the fixed frame 20. The drive element 40 is mounted on the fixed frame 20 and is used to drive the compound fan blade 30 to rotate relative to the fixed frame 20. Specifically, the drive element 40 is, for example, a motor, and includes a stator (not shown) and a rotor (not shown). The stator and rotor are, for example, matched magnets or coils. The stator is fixedly mounted on the fixed frame 20. The rotor can rotate relative to the stator through electromagnetic effects to drive the compound fan blade 30 to rotate relative to the fixed frame 20.

[0042] The composite fan blade 30 includes a metal part 31 and a plastic part 32. The metal part 31 is formed, for example, by forging and computer numerical control (CNC) machining, and includes a connecting portion 311 and multiple blade portions 312. These blade portions 312 are connected around the connecting portion 311. The metal part 31 is made of, for example, aluminum, and the plastic part 32 is made of, for example, ABS resin.

[0043] In detail, the joint 311 includes a base plate 3111 and a plurality of connecting plates 3112. These connecting plates 3112 are respectively connected to the periphery of the base plate 3111 and are spaced apart, with a notch N formed between any two adjacent connecting plates 3112. This makes the top surface of the base plate 3111 approximately gear-shaped to facilitate the processing of the metal part 31 and prevent interference between the joint 311 and the cutting tool of the processing equipment. In addition, by providing these notches N, magnetic conductivity between the metal part 31 and the drive element 40 can be avoided, thereby preventing noise from being generated when the composite fan blade 30 is running.

[0044] Each of the connecting plates 3112 has an inner side 31121, an outer side 31122, and a groove 31123. The outer side 31122 faces away from the inner side 31121. The blade portions 312 protrude from the outer side 31122 of the connecting plates 3112. The grooves 31123 are located on the inner side 31121.

[0045] The plastic part 32 is, for example, cylindrical and at least partially joined to the joint portion 311 of the metal part 31. Furthermore, the plastic part 32 is at least partially joined to the grooves 31123 of the connecting plate 3112 of these joint portions 311, so that the joint portion 311 of the metal part 31 and the plastic part 32 together form a hub structure. The joining method between the metal part 31 and the plastic part 32 can be, for example, injection molding, bonding, or riveting. Taking injection molding as an example, the plastic part 32 is injection molded into these grooves 31123 to form a hub structure with the joint portion 311 of the metal part 31, and the grooves 31123 provide better bonding strength between the metal part 31 and the plastic part 32.

[0046] In this embodiment, since the composite fan blade 30 is formed by combining a metal part 31 and a plastic part 32, compared to fan blades made of ordinary plastic materials or other single-material fan blades, the composite fan blade 30 of this embodiment can absorb sound or dampen vibration to reduce noise generated during operation. Furthermore, since a gap N is formed between any two adjacent connecting plates 3112, magnetic conductivity between the metal part 31 and the driving element 40 can be avoided, further reducing noise generated during the operation of the composite fan blade 30. This provides users with a more comfortable experience when using electronic products.

[0047] Furthermore, the metal component 31 of the composite fan blade 30 is made of metal, which not only enhances the aesthetics of the composite fan blade 30 but also provides the metal component 31 with good durability, corrosion resistance, and structural strength, thereby extending the service life of the fan device 10. On the other hand, the metal component 31 can be formed not only through forging and computer numerical control machining processes, but also through welding, casting, or other methods, thus adapting to different design requirements.

[0048] In this embodiment, the substrate 3111 of the joint portion 311 may also have a plurality of clearance recesses 31111. These clearance recesses 31111 correspond to these notches N respectively. By providing these clearance recesses 31111, after the metal part 31 is forged and processed by computer numerical control, a cutting tool can be used to cut into these clearance recesses 31111 to facilitate the overall cutting and finishing of the fan device 10, preventing interference between the cutting tool and the joint portion 311 of the fan device 10, thereby improving the convenience of processing.

[0049] In this embodiment, the plastic part 32 may also have an annular groove 321. The annular groove 321 facilitates the bonding of the metal part 31 and the plastic part 32 during the manufacturing process of the composite fan blade 30. For example, the metal part 31 and the plastic part 32 are bonded together through the annular groove 321.

[0050] In this embodiment, the substrate 3111 of the metal part 31 may also have multiple openings (not shown). These openings are arranged along a circumferential line. By providing these openings, the plastic part 32 can be more firmly bonded to the joint 311 of the metal part 31 after injection molding.

[0051] Please see Figure 3 and Figure 4 . Figure 4 This is a perspective view of the fan device according to the second embodiment of the present invention. Figure 4 for Figure 3 An exploded view of the fan assembly.

[0052] The fan device 10A of this embodiment is similar to the fan device 10 of the first embodiment. Therefore, the differences between this embodiment and the first embodiment will be described below, and the similarities will not be repeated. In this embodiment, the metal part 31A further includes an outer ring portion 313A. The outer ring portion 313A is used for noise reduction. The outer ring portion 313A is connected to the side of these blade portions 312 away from the joint portion 311A ​​and surrounds these blades inside. By providing the outer ring portion 313A, the noise generated when the composite fan blade 30A is operating can be reduced or the structural strength can be enhanced.

[0053] In this embodiment, the plastic part 32A does not have the annular groove as in the first embodiment, but the substrate 3111A of the metal part 31A has two annular grooves 3111A1. By providing two annular grooves 3111A1, the metal part 31A and the plastic part 32A can be easily combined during the manufacturing process of the composite fan blade 30A.

[0054] In the first and second embodiments, the side and top surfaces of the plastic parts 32 and 32A are connected by an inclined plane, but this is not a limitation. In other embodiments, the side and top surfaces of the plastic parts may be connected by, for example, a stepped structure, depending on process requirements.

[0055] According to the composite fan blade and fan device of the above embodiment, since the composite fan blade is made of a combination of metal and plastic parts, compared with fan blades made of ordinary plastic or other single materials, the composite fan blade of this embodiment can absorb sound or dampen vibration to reduce noise generated during operation. Furthermore, since a gap is formed between any two adjacent connecting plates, magnetic conduction between the metal parts and the drive element can be avoided, further reducing noise generated during the operation of the composite fan blade. This provides users with a more comfortable experience when using electronic products.

[0056] Furthermore, the metal components of the composite fan blades are made of metal, which not only enhances the aesthetics of the composite fan blades but also provides the metal components with good durability, corrosion resistance, and structural strength, thereby extending the service life of the fan unit. On the other hand, in addition to being formed through forging and computer numerical control machining processes, the metal components can also be formed through methods such as welding, casting, or machining, thus adapting to different design requirements.

[0057] Although the present invention has been disclosed above with reference to the foregoing embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the scope of protection of the appended claims.

Claims

1. A composite fan blade, characterized in that, Include: A metal component comprising a joint and a plurality of blade portions connected around the joint; and A plastic part, in the shape of a cylinder, is at least partially joined to the joint of the metal part, such that the joint of the metal part and the plastic part together form a hub structure. The joint includes a base plate and a plurality of connecting plates. The connecting plates are respectively connected to the periphery of the base plate and are spaced apart to form a notch between any two adjacent connecting plates. Each connecting plate has an inner side, an outer side and a groove. The outer side faces away from the inner side, and the blades protrude from the outer side of the connecting plates. The grooves are located on the inner side, and the plastic part is at least partially connected to the grooves.

2. The composite fan blade as described in claim 1, characterized in that, The substrate of the joint has a plurality of recessed portions, which correspond to the notches respectively.

3. The composite fan blade as described in claim 2, characterized in that, The metal part is formed through a combination of forging and computer numerical control machining processes.

4. The composite fan blade as described in claim 1, characterized in that, The metal part and the plastic part are joined by injection molding, adhesive bonding or riveting.

5. The composite fan blade as described in claim 1, characterized in that, The metal component further includes an outer ring portion connected to the side of the blade portions away from the joint portion and surrounding the blades inside.

6. A fan device, characterized in that, Include: A fixed frame; A composite fan blade is rotatably mounted on the fixed frame, the composite fan blade comprising; A metal component comprising a joint and a plurality of blade portions connected around the joint; and A plastic component, cylindrical in shape, is at least partially joined to the joint portion of the metal component, such that the joint portion of the metal component and the plastic component together form a hub structure; and A driving element is disposed on the fixed frame and is used to drive the composite fan blade to rotate relative to the fixed frame; The joint includes a base plate and a plurality of connecting plates. The connecting plates are respectively connected to the periphery of the base plate and are spaced apart to form a notch between any two adjacent connecting plates. Each connecting plate has an inner side, an outer side and a groove. The outer side faces away from the inner side, and the blades protrude from the outer side of the connecting plates. The grooves are located on the inner side, and the plastic part is at least partially connected to the grooves.

7. The fan device as claimed in claim 6, characterized in that, The substrate of the joint has a plurality of recessed portions, which correspond to the notches respectively.

8. The fan device as claimed in claim 7, characterized in that, The metal part is formed through a combination of forging and computer numerical control machining processes.

9. The fan device as claimed in claim 6, characterized in that, The metal part and the plastic part are joined by injection molding, adhesive bonding or riveting.

10. The fan device as claimed in claim 6, characterized in that, The metal component further includes an outer ring portion connected to the side of the blade portions away from the joint portion and surrounding the blades inside.

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