TW201732494A - Fan blade with improved structure - Google Patents

Abstract

A fan blade with improved structure includes a hub, a plurality of blades. The hub has a lateral side having two ends, one of which is formed a top side and the other end is extended to form an extended section, and a plurality of connecting slots located on the periphery of the extended section. Each blade has a first end correspondingly engaged in respective connecting slot and a second end. With these arrangements, the fan blade with improved structure can increase structural strength of thin fan blades and be easy to connect the hub to the blades.

Description

Fan blade improved structure

The invention relates to a fan blade improved structure, in particular to a fan blade improved structure capable of improving the strength of a thin blade structure.

The fan is a common part in the field of electronic heat dissipation, usually made of metal or plastic, but when the blade is made of plastic, it is made by injection molding, so the blade has a certain thickness of usually more than 0.3 mm, and because of the plastic material characteristics, The fan blades should not be too thin (so the number of blades cannot be increased) to avoid the fan blades failing to withstand the wind resistance at the time of rotation, thus reducing the thickness of the blades to make them ultra-thin blades and having considerable strength, and how to make the super The combination of thin blades and the hub of the fan, and how to avoid increasing the number of ultra-thin blades to cause uneven wheel load, is the current efforts of the industry.

Accordingly, in order to effectively solve the above problems, the main object of the present invention is to provide a fan blade improved structure capable of improving the strength of a thin blade structure. A secondary object of the present invention is to provide a fan blade improved structure that can improve the weight bearing unevenness caused by the combination of the conventional blade and the hub and affect the lack of fan balance. In order to achieve the above object, the present invention provides a modified fan blade structure, comprising a hub and a plurality of blades, the hub having a side portion, the side portion forming a top portion at one end and an extension portion extending outward from the other end, and A plurality of coupling grooves are formed at a periphery of the extending portion, and the blade has a first end and a second end, and the first ends of the blades are correspondingly embedded in the coupling groove. Through the design of the structure of the present invention, the first end of the blade is correspondingly embedded in the coupling groove formed at the periphery of the extension of the hub, and the blades are fixed by laser welding or other mechanical processing. In combination with the groove, the structural strength of the thin blade can be greatly improved, and the weight bearing unevenness caused by the combination of the conventional blade and the hub is improved, which affects the lack of fan balance.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings. 1 , 2, 3A, 3B, and 4 are a perspective exploded view, a perspective assembled view, a perspective exploded view, and a perspective enlarged view and a cross-sectional view of the first embodiment of the fan blade improved structure of the present invention. As shown, a fan blade improvement structure 1 includes a hub 11 and a plurality of blades 12 having a side portion 111 having a top portion 112 at one end and an extension portion 113 extending outwardly from the other end. A plurality of coupling grooves 115 are formed at the periphery of the extending portion 113, and the side portion 111 and the top portion 112 and the extending portion 113 of the hub 11 are integrally formed. In the present embodiment, the coupling grooves 115 are arranged equidistantly at the periphery of the extending portion 113. In actual implementation, the coupling grooves 115 may also be arranged at unequal distances at the periphery of the extending portion 113. (not shown). The fan blade 12 has a first end 121 as a joint end, and a second end 122 is a free end. The first and second ends 121 and 122 are respectively disposed at two ends of the blades 12 . The first end 121 of the fan blade 12 is correspondingly embedded in the coupling groove 115, and the fan blades 12 are arc-shaped or non-arc-shaped. This embodiment adopts an arc-shaped structure as an illustrative embodiment. But it is not limited. The height of the blade 12 at the first end 121 of the blade 12 can be selected to be less than or equal to the height of the second end 122. In this embodiment, the first end 121 is smaller than the second end 122 as an illustration. , but not limited to. The material of the blade 12 according to the present invention is made of metal and is formed by metal stamping or injection molding, and the thickness of the blade 12 is preferably less than 0.15 mm, and the material of the hub 11 is the same. For the metal, and by the injection molding method or the die-casting method or the stamping method, the blade 12 and the hub 11 are combined in the manner of fixing the blades 12 in the coupling groove 115 by laser welding. In the example, since the blade 12 and the hub 11 are made of a metal material, the two metal materials (the materials may be the same or different) of the blade 12 and the hub 11 are formed by the laser welding method of machining at the portion to be joined. Melting into a liquid, after cooling and solidifying, the two metal materials are welded together, so that the blades 12 can be firmly fixed to the hub 11 without additional flux or filler, and the thin fan can be greatly improved. The structural strength of the blade 12 and the improvement of the conventional fan blade and the hub combination method require the use of flux or filler to fix the weight bearing unevenness and affect the lack of fan balance. Through the design of the structure of the present invention, the first end 121 of the blade 12 is correspondingly embedded in the coupling groove 115 formed at the periphery of the extending portion 113 of the hub 11, and then the fan is welded by laser welding. The first end 121 of the leaf 12 is fixed in the coupling groove 115, so that the blade 12 can be firmly fixed on the hub 11, and the structural strength of the thin blade 12 can be greatly improved, and the conventional utilization can be improved. Flux or filler means the lack of fan imbalance caused by the combination of the blades and the hub. However, it is not limited thereto, please refer to FIGS. 5, 6A, 6B, 6C, and 6D, which are perspective exploded views, an implementation schematic diagram, and an enlarged schematic view of a second embodiment of the improved fan blade structure of the present invention, in another alternative. After the first end 121 of the blade 12 is inserted into the coupling groove 115, the fixture 2 is passed through the fixture 2 and the two sides of the coupling groove 115 are aligned with the fixture 2 Applying a pressure (the fixture 2 can be selected from either the upper side or the lower side of the hub 11 or the upper and lower sides simultaneously apply pressure to both sides of the coupling groove 115). A groove 116 is formed at the position to which the pressure is applied, and the groove 116 is further pressed to deform the coupling groove 115 (as shown in FIG. 6D), thereby inserting the fan inserted into the coupling groove 115. The first end 121 of the leaf 12 is tightly clamped to the extension 113 so that the blades 12 can be securely fastened to the hub 11. Please refer to FIGS. 7 and 8 for a perspective view and a cross-sectional view of a third embodiment of the improved fan blade structure of the present invention. The corresponding relationship between the components and components of the fan blade improved structure is as described above. The modified structure of the fan blade is the same, so it will not be described here. However, the most important difference between the improved fan blade structure and the foregoing is that the extension of the extension portion 113 of the hub 11 is more upward and toward the top 112 of the hub 11. The direction extending to form a joint portion 114, the joint groove 115 is further extended to the position of the joint portion 114. Through the embodiment, the first end 121 of the blade 12 is fixed by laser welding. The aforementioned effect can also be achieved in the coupling groove 115 of the hub 11. As described above, the present invention has the following advantages compared with the prior art: 1. Improving the structural strength of the thin blade; 2. Improving the uneven weight bearing caused by the combination of the conventional blade and the hub, and affecting the lack of fan balance. The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention.

1‧‧‧Fan fan blade improved structure
11‧‧·wheels
111‧‧‧ side
112‧‧‧ top
113‧‧‧Extension
114‧‧‧Combination Department
115‧‧‧ joint slot
116‧‧‧ Groove
12‧‧‧ fan leaves
121‧‧‧ first end
122‧‧‧ second end
2‧‧‧ fixture

1 is a perspective exploded view of a first embodiment of a fan blade improved structure of the present invention; FIG. 2 is a perspective assembled view of a first embodiment of a fan blade improved structure of the present invention; FIG. 3B is a schematic view showing the implementation of the first embodiment of the improved fan blade structure of the present invention; FIG. 4 is a schematic diagram of the improved structure of the fan blade of the present invention. FIG. 5 is a perspective exploded view of a second embodiment of the improved fan blade structure of the present invention; FIG. 6A is a schematic view showing the second embodiment of the improved fan blade structure of the present invention; 6B is a schematic view showing the implementation of the second embodiment of the improved fan blade structure of the present invention; FIG. 6C is an enlarged schematic view showing the second embodiment of the improved fan blade structure of the present invention; FIG. 6D is a fan of the present invention. FIG. 7 is a perspective sectional view showing a third embodiment of the improved fan blade structure of the present invention; FIG. 8 is a sectional view showing the improved structure of the fan blade of the present invention. Sectional view of the embodiment.

1‧‧‧Fan fan blade improved structure

11‧‧·wheels

111‧‧‧ side

112‧‧‧ top

113‧‧‧Extension

115‧‧‧ joint slot

12‧‧‧ fan leaves

121‧‧‧ first end

122‧‧‧ second end

Claims (10)

A fan blade improved structure includes: a hub having a side portion, a side portion of the side portion forming a top portion, an extension portion extending outwardly from the other end portion, and a plurality of coupling grooves being formed at a periphery of the extension portion; and a plurality of fans The leaf has a first end and a second end, and the first ends of the blades are correspondingly embedded in the coupling groove. The fan blade modified structure of claim 1, wherein the extending portion of the hub extends upwardly and toward the top direction to form a joint portion, and the joint groove extends further to the joint portion. The improved fan blade blade structure of claim 1, wherein the coupling grooves are arranged equidistantly or unequally at the joint. The fan blade improved structure of claim 1, wherein the fan blades are fixed to the coupling groove of the hub by laser welding. The fan blade improved structure of claim 1, wherein the fan blades are curved or non-arc. The fan blade improved structure of claim 1, wherein the blade height of the first end is less than or equal to the blade height of the second end. The fan blade improved structure according to claim 1, wherein the hub and the fan blade are made of the same material or different materials. The fan blade improved structure of claim 1, wherein the blades have a thickness of less than 0.15 mm. The improved fan blade blade structure of claim 1, wherein the side portion and the top portion and the extension portion of the hub are integrally formed. The improved fan blade blade structure according to claim 1, wherein the extension portion has a groove formed on each side of the coupling groove by using a jig, thereby deforming the coupling groove for squeezing Pressing the first end of the fan blade.