按，隨著電子設備計算效能日漸增強，其內部所設置之電子元件於運作時會產生大量熱量，通常需於電子元件上設置散熱器或散熱鰭片以增加散熱面積進而提升散熱效果，但散熱器與散熱鰭片藉由輻射方式作散熱，所達到之散熱效果有限，故需額外增設具有提升散熱效能的散熱風扇對散熱器或散熱鰭片進行散熱，藉以提升散熱效能，因此，散熱風扇變成為散熱模組中非常重要之元件。 習知風扇輪轂與軸心固定結構，請參閱第1圖所示，係透過沖壓方式將軸心11成型在該銅套12之孔洞121上，並繼續再將結合有軸心11的銅套12利用沖壓方式成型在一鐵殼13之套孔131上而構成一輪轂10，該輪轂10於外周側上藉由塑膠射出的方式成型出複數扇葉14，使該等扇葉14與輪轂10結合一體以構成所述扇輪1，雖然採用此沖壓結合的結構可有效改善因高溫而造成軸心11歪斜及扇輪1變形的問題，卻延伸出另一問題，即鐵殼13需透過連續模具製程，使整體風扇輪轂及軸心固定過程較為繁瑣且複雜；此外，透過此製程必須具有銅套12、鐵殼13及軸心11三者材料才能完整成型出所述輪轂10，導致整體成本提高，而造成增加材料成本的問題。 以上所述，習知具有下列之缺點： 1.組裝繁瑣且複雜； 2.增加生產成本。 是以，要如何解決上述習用之問題與缺失，即為本案之創作人與從事此行業之相關廠商所亟欲研究改善之方向所在者。According to the increasing computing power of electronic devices, the electronic components installed inside will generate a large amount of heat during operation. Usually, heat sinks or heat sink fins are needed on the electronic components to increase the heat dissipation area and improve the heat dissipation effect. The heat sink and the heat sink fins are radiated for heat dissipation, and the heat dissipation effect is limited. Therefore, an additional cooling fan with improved heat dissipation performance is required to dissipate heat from the heat sink or the heat sink fins, thereby improving heat dissipation performance, and therefore, the heat sink fan becomes It is a very important component in the heat dissipation module. For the conventional fan hub and the shaft fixing structure, as shown in FIG. 1 , the shaft 11 is formed on the hole 121 of the copper sleeve 12 by punching, and the copper sleeve 12 incorporating the shaft 11 is further continued. Formed by a stamping method on a sleeve hole 131 of an iron shell 13 to form a hub 10, the hub 10 is formed on the outer peripheral side by plastic injection to form a plurality of blades 14, so that the blades 14 are combined with the hub 10. Integrating to form the fan wheel 1 , although the structure of the press combination can effectively improve the problem of the skew of the shaft 11 and the deformation of the fan wheel 1 due to high temperature, another problem is extended, that is, the iron shell 13 needs to pass through the continuous mold. The process makes the overall fan hub and the shaft center fixing process cumbersome and complicated; in addition, the process must have the copper sleeve 12, the iron shell 13 and the shaft core 11 to completely form the hub 10, resulting in an overall cost increase. , causing problems with increased material costs. As described above, the conventional disadvantages have the following disadvantages: 1. The assembly is cumbersome and complicated; 2. The production cost is increased. Therefore, how to solve the above problems and problems in the past, that is, the creators of the case and the relevant manufacturers engaged in this industry are eager to study the direction of improvement.
爰此，為有效解決上述之問題，本創作之主要目的在於提供一種可大幅減少生產成本之風扇輪轂與軸心固定結構。 本創作之次要目的，在於提供一種可使組裝更為便利之風扇輪轂與軸心固定結構。 本創作之次要目的，在於提供一種可增加輪轂與軸心之間的結合力之風扇輪轂與軸心固定結構。 本創作之次要目的，在於提供一種可大幅減少生產成本之風扇。 本創作之次要目的，在於提供一種可使組裝更為便利之風扇。 本創作之次要目的，在於提供一種可增加輪轂與軸心之間的結合力之風扇。 為達上述目的，本創作係提供一種風扇輪轂與軸心固定結構，係包括一扇輪及一軸心，該扇輪具有一輪轂及複數扇葉，該輪轂具有一頂部，該頂部周緣軸向延伸一側壁，該頂部中央處形成有一孔洞，並所述孔洞內側設有至少一凹槽或至少一凸設部，該等扇葉係環設於該側壁的外周側上，所述軸心具有一第一端及一相反該第一端之第二端，該第一端具有至少一組合部，該組合部係形成在該第一端的外側上，且其與對應的該凹槽或凸設部相嵌設。 故透過本創作此結構的設計，藉由所述孔洞內側設有之凹槽或凸設部與所述軸心第一端之組合部相嵌設，達到軸心與輪轂能相互固定結合之結構，免除習知需透過銅套的使用，進以大幅降低生產成本；除此之外，所述輪轂直接與軸心相接觸嵌設，達到組裝更加便利，且由於所述軸心與輪轂為直接嵌合設置，故可大幅增進所述軸心與輪轂之間的結合力。 本創作另提供一種風扇，係包括一框體、一扇輪及一軸心，該框體具有一容置空間及一軸座，該軸座係設置在該容置空間之中央處，該軸座具有一軸孔，所述扇輪係與所述軸座相樞設，該扇輪具有一輪轂及複數扇葉，該輪轂具有一頂部，該頂部周緣軸向延伸一側壁，該頂部之中央處形成有一孔洞，並所述孔洞內側設有至少一凹槽或至少一凸設部，該等扇葉係環設於該側壁的外周側上，所述軸心具有一第一端及一相反該第一端之第二端，該第二端係樞設於所述軸孔內，該第一端具有至少一組合部，該組合部係形成在該第一端的外側上，且與其對應的該凹槽或凸設部相嵌設。 故透過本創作此結構的設計，藉由所述孔洞內側設有之凹槽或凸設部與所述軸心第一端之組合部相嵌設，達到軸心與輪轂能相互固定結合之結構，免除習知需透過銅套的使用，進以大幅降低生產成本；除此之外，所述輪轂直接與軸心相接觸嵌設，達到組裝更加便利，且由於所述軸心與輪轂為直接嵌合設置，故可大幅增進所述軸心與輪轂之間的結合力。Therefore, in order to effectively solve the above problems, the main purpose of the present invention is to provide a fan hub and a shaft fixing structure which can greatly reduce the production cost. The secondary purpose of this creation is to provide a fan hub and shaft fixing structure that facilitates assembly. The second objective of the present invention is to provide a fan hub and shaft fixing structure that can increase the bonding force between the hub and the shaft center. The second objective of this creation is to provide a fan that can significantly reduce production costs. The secondary purpose of this creation is to provide a fan that facilitates assembly. The secondary purpose of this creation is to provide a fan that increases the bonding force between the hub and the shaft. In order to achieve the above object, the present invention provides a fan hub and a shaft fixing structure, which comprises a fan wheel and an axle center, the fan wheel has a hub and a plurality of blades, the hub has a top portion, and the top circumference axial direction Extending a side wall, a hole is formed in the center of the top portion, and at least one groove or at least one protruding portion is disposed on the inner side of the hole, and the fan blade ring is disposed on an outer peripheral side of the side wall, the axis has a first end and a second end opposite the first end, the first end having at least one combination portion, the combined portion being formed on an outer side of the first end, and corresponding to the groove or convex The installation is embedded. Therefore, through the design of the structure of the present invention, the groove or the convex portion provided on the inner side of the hole is embedded with the combined portion of the first end of the axial center, so that the axial center and the hub can be fixedly coupled to each other. In addition to the conventional use, the use of the copper sleeve is required to greatly reduce the production cost; in addition, the hub is directly embedded in the axial center to facilitate assembly, and since the shaft and the hub are directly The fitting is provided, so that the bonding force between the shaft center and the hub can be greatly improved. The present invention further provides a fan, comprising a frame body, a fan wheel and a shaft center, the frame body has an accommodating space and a shaft seat, and the shaft seat is disposed at a center of the accommodating space, the shaft seat Having a shaft hole, the fan wheel system is pivoted with the shaft seat, the fan wheel has a hub and a plurality of blades, the hub has a top portion, and the top periphery extends axially to a side wall, and the center of the top portion is formed a hole having a hole, and at least one groove or at least one protruding portion is disposed on the inner side of the hole, the fan blade ring is disposed on an outer circumferential side of the side wall, the axis has a first end and an opposite end a second end of the one end, the second end is pivotally disposed in the shaft hole, the first end has at least one combination portion, and the combined portion is formed on an outer side of the first end, and the corresponding portion thereof The groove or the protruding portion is embedded. Therefore, through the design of the structure of the present invention, the groove or the convex portion provided on the inner side of the hole is embedded with the combined portion of the first end of the axial center, so that the axial center and the hub can be fixedly coupled to each other. In addition to the conventional use, the use of the copper sleeve is required to greatly reduce the production cost; in addition, the hub is directly embedded in the axial center to facilitate assembly, and since the shaft and the hub are directly The fitting is provided, so that the bonding force between the shaft center and the hub can be greatly improved.
本創作之上述目的及其結構與功能上的特性，將依據所附圖式之較佳實施例予以說明。 請參閱第2A、2B、2C圖，係為本創作風扇輪轂與軸心固定結構之第一實施例之立體分解圖及立體組合圖及剖視圖，如圖所示，一種風扇輪轂與軸心固定結構，係包括一扇輪2及一軸心3，所述扇輪2具有一輪轂21及複數扇葉22，該輪轂21具有一頂部211，並由該頂部211周緣軸向延伸一側壁212，該頂部211之中央處形成有一孔洞2111，所述孔洞2111內側設有至少一凹槽2112，該等扇葉22係環設於該側壁212的外周側上； 前述之軸心3具有一第一端31及一相反該第一端31之第二端32，該第一端31具有至少一組合部311，所述組合部311係形成設在該第一端31的外側上，且其與對應的該凹槽2112或凸設部2114相互嵌設，該第二端32設置有至少一溝槽321，其係沿該第二端32的外側凹設構成。 續請參閱第2C圖，透過本創作此結構的設計，於本實施例中，所述組合部311係為一凸體，該凸體係從該第一端31的外側上凸伸構成，所述凹槽2112係由該孔洞2111內側凹設構成，且與對應的該凸體相嵌設，透過所述第一端31上凸伸的凸體嵌設於孔洞2111內側的凹槽2112上，形成輪轂21與軸心3相互結合固定之結構，免去習知風扇輪轂與軸心結合時需使用銅套之元件，進以大幅降低生產成本；除此之外，由於所述輪轂21直接與軸心3相接觸嵌合設置，達到組裝更加便利，且可大幅增進所述軸心3與輪轂21之間的結合力。 請參閱第3A、3B、3C圖，係為本創作風扇輪轂與軸心固定結構之第二實施例之立體分解圖及立體組合圖及剖視圖，所述之風扇輪轂與軸心固定結構部份元件及元件間之相對應之關係與前述之風扇輪轂與軸心固定結構相同，故在此不再贅述，惟本風扇輪轂與軸心固定結構與前述最主要之差異為，前述組合部311係為一凹孔，該凹孔係從該第一端31的外側上凹設構成，所述孔洞2111內側設有至少一凸設部2114，該凸設部2114則從該孔洞2111內側朝該孔洞2111中心處凸伸構成，且與對應的該凹孔相嵌設，透過所述第一端31外側凹設的凹孔嵌設於孔洞2111內側凸伸的凸設部2114，形成輪轂21與軸心3相互結合固定之結構，進以大幅降低生產成本，並使組裝更加便利，且由於所述輪轂21直接與軸心3相接觸嵌合設置，進以增加所述軸心3與輪轂21之間的結合力。 請參閱第4A、4B、4C圖，係為本創作風扇輪轂與軸心固定結構之第三實施例之立體分解圖及立體組合圖及剖視圖，所述之風扇輪轂與軸心固定結構部份元件及元件間之相對應之關係與前述之風扇輪轂與軸心固定結構相同，故在此不再贅述，惟本風扇輪轂與軸心固定結構與前述最主要之差異為，所述第一端31具有複數組合部311，前述每一組合部311係為一凸體，該等凸體係沿該第一端31外側上凸伸構成的，且該等凸體彼此之間界定一第一結合部311a，該等凹槽2112係沿該孔洞2111內側凹設構成，且與該等凸體相對應嵌設，並該等凹槽2112彼此之間界定一第二結合部2113，該第二結合部2113係與相對的第一結合部311a相嵌合，藉由所述凸體與凹槽2112的相嵌合設置，以及該第一結合部311a與該第二結合部2113的相互嵌合後，使輪轂21與軸心3不需透過銅套也可相互結合固定，達到大幅減少生產成本且組裝更為便利，除此之外，由於輪轂21係直接與軸心3相接觸嵌合設置，進以提高所述軸心3與輪轂21之間的結合力。 請參閱第5A、5B、5C圖，係為本創作風扇輪轂與軸心固定結構之第四實施例之立體分解圖及立體組合圖及剖視圖，所述之風扇輪轂與軸心固定結構部份元件及元件間之相對應之關係與前述之風扇輪轂與軸心固定結構相同，故在此不再贅述，惟本風扇輪轂與軸心固定結構與前述最主要之差異為，所述第一端31具有複數組合部311，前述每一組合部311係為一凹孔，該等凹孔係沿該第一端31外側上凹設構成，且該等凹孔彼此之間界定一第三結合部311b，該等凸設部2114係沿該孔洞2111內側朝該孔洞2111的中心處凸伸構成，且與該等凹孔相對應嵌設，並該等凸設部2114彼此之間界定一第四結合部2115，該第四結合部2115對應與該第三結合部311b相嵌合，藉由所述凸設部2114與凹孔的相嵌合設置，以及該第三結合部311b與該第四結合部2115的相互嵌合後，使輪轂21與軸心3不需透過銅套也可相互結合固定，達到大幅減少生產成本且組裝更為便利，除此之外，由於輪轂21係直接與軸心3相接觸嵌合設置，進以提高所述軸心3與輪轂21之間的結合力。 請參閱第6圖，係為本創作風扇之第一實施例之立體分解圖，如圖所示，一種風扇，係包括一框體4、一扇輪2及一軸心3，該框體4具有一容置空間41及一軸座42，該軸座42係設置在該容置空間41之中央處，該軸座42具有一軸孔421，所述扇輪2係與所述軸座42相樞設，該扇輪2具有一輪轂21及複數扇葉22，該輪轂21具有一頂部211，該頂部211周緣軸向延伸一側壁212，該頂部211之中央處形成有一孔洞2111，並所述孔洞2111內側設有至少一凹槽2112，該等扇葉22係環設於該側壁212的外周側上，所述軸心3具有一第一端31及一相反該第一端31之第二端32，該第二端32係樞設於所述軸孔421內，該第一端31具有至少一組合部311，該組合部311係形成在該第一端31的外側上，且與其對應的該凹槽2112或凸設部2114相嵌設，該軸心3之第二端32設有至少一溝槽321，該溝槽321係沿該第二端32的外側凹設構成。 前述之軸座42更套設有一定子組5，該定子組5係由複數矽鋼片51所組成並纏繞有複數線圈52。 續請參閱第6圖並一併參閱第2C圖，透過本創作此結構的設計，於本實施例中，所述組合部311係為一凸體，該凸體係從該第一端31的外側上凸伸所構成，該凹槽2112係從該孔洞2111內側凹設構成，且與對應的該凸體相嵌設，透過所述凸體與凹槽2112相互嵌設，形成輪轂21與軸心3相互結合固定，免去習知風扇輪2轂與軸心3結合時須使用銅套之元件，進以大幅減少生產成本；除此之外，由於所述輪轂21直接與軸心3相接觸嵌合設置，進以達到組裝更加便利，且可大幅增進所述軸心3與輪轂21之間的結合力。 請參閱第7圖並一併參閱第3C圖，係為本創作風扇之第二實施例之立體分解圖，所述之風扇部份元件及元件間之相對應之關係與前述之風扇相同，故在此不再贅述，惟本風扇與前述最主要之差異為，前述組合部311係為一凹孔，該凹孔係從該第一端31的外側上凹設構成，所述孔洞2111內側設有至少一凸設部2114，該凸設部2114則從該孔洞2111內側朝該孔洞2111中心處凸伸構成，且與對應的該凹孔相嵌設，透過所述凹孔與凸設部2114相互嵌設，形成輪轂21與軸心3相互結合固定，免去習知風扇輪2轂與軸心3結合時須使用銅套之元件，大幅減少生產成本；除此之外，由於所述輪轂21直接與軸心3相接觸嵌合設置，進以達到組裝更加便利，且可大幅增進所述軸心3與輪轂21之間的結合力。 請參閱第8圖並一併參閱第4C圖，係為本創作風扇之第三實施例之立體分解圖，所述之風扇部份元件及元件間之相對應之關係與前述之風扇相同，故在此不再贅述，惟本風扇與前述最主要之差異為，所述第一端31具有複數組合部311，前述每一組合部311係為一凸體，該等凸體係沿該第一端31外側上凸伸構成，且該等凸體彼此之間界定一第一結合部311a，該等凹槽2112係沿該孔洞2111內側凹設構成，且與該等凸體相對應嵌設，並該等凹體彼此之間界定一第二結合部2113，該第二結合部2113係與相對的第一結合部311a相嵌合，藉由所述凸體與凹槽2112的相嵌合設置，以及該第一結合部311a與第二結合部2113的相互嵌合後，使輪轂21與軸心3不需透過銅套也可相互結合固定，進以減少生產成本且組裝更便利，此外，由於輪轂21係直接與軸心3相接觸嵌合設置，進以提高所述軸心3與輪轂21之間的結合力。 最後，請參閱第9圖並一併參閱第5C圖，係為本創作風扇之第四實施例之立體分解圖，所述之風扇部份元件及元件間之相對應之關係與前述之風扇相同，故在此不再贅述，惟本風扇與前述最主要之差異為，所述第一端31具有複數組合部311，前述每一組合部311係為一凹孔，該等凹孔係沿該第一端31外側上凹設構成，且該等凹孔彼此之間界定一第三結合部311b，該等凸設部2114係沿該孔洞2111內側朝該孔洞2111的中心處凸伸構成，且與該等凹孔相對應嵌設，並該等凸設部2114彼此之間界定一第四結合部2115，該第四結合部2115對應與該第三結合部311b相嵌合，藉由所述凸設部2114與凹孔的相嵌合設置，以及該第三結合部311b與該第四結合部2115的相互嵌合後，免去習知銅套也可使輪轂21與軸心3相互固定，達到降低生產成本且組裝便利，此外，由於輪轂21係直接與軸心3相接觸嵌合設置，進以提高所述軸心3與輪轂21之間的結合力。 以上所述，本創作相較於習知具有下列優點： 1.大幅減少生產成本； 2.組裝更加便利； 3.大幅增加輪轂與軸心之結合力。 以上已將本創作做一詳細說明，惟以上所述者，僅為本創作之一較佳實施例而已，當不能限定本創作實施之範圍。即凡依本創作申請範圍所作之均等變化與修飾等，皆應仍屬本創作之專利涵蓋範圍。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. Please refer to FIGS. 2A, 2B, and 2C for an exploded perspective view and a perspective view and a cross-sectional view of the first embodiment of the fan hub and the shaft center fixing structure. As shown in the drawing, a fan hub and a shaft center fixing structure are shown. The present invention includes a wheel 2 and a shaft 3, the wheel 2 having a hub 21 and a plurality of blades 22 having a top portion 211 and a side wall 212 extending axially from the periphery of the top portion 211. A hole 2111 is formed in the center of the top portion 211. The inner side of the hole 2111 is provided with at least one groove 2112. The fan blades 22 are annularly disposed on the outer peripheral side of the side wall 212. The axial center 3 has a first end. 31 and a second end 32 of the first end 31 opposite to the first end 31, the first end 31 has at least one combination portion 311 formed on the outer side of the first end 31, and corresponding thereto The recess 2112 or the protruding portion 2114 is embedded with each other, and the second end 32 is provided with at least one groove 321 which is formed to be recessed along the outer side of the second end 32. Continuing to refer to FIG. 2C, in the present embodiment, the combination portion 311 is a convex body, and the convex system is formed by protruding from the outer side of the first end 31. The groove 2112 is formed by recessing the inner side of the hole 2111, and is embedded with the corresponding convex body. The convex body protruding through the first end 31 is embedded in the groove 2112 inside the hole 2111, and is formed. The structure that the hub 21 and the shaft core 3 are combined with each other eliminates the need to use the components of the copper sleeve when the fan hub and the shaft core are combined, thereby greatly reducing the production cost; in addition, since the hub 21 is directly connected with the shaft The core 3 is contact-fitted to facilitate assembly, and the bonding force between the shaft 3 and the hub 21 can be greatly enhanced. Please refer to FIGS. 3A, 3B, and 3C, which are perspective exploded view and a perspective assembled view and a cross-sectional view of a second embodiment of the fan hub and the shaft center fixing structure, the fan hub and the shaft core fixing structure component. And the corresponding relationship between the components and the fan hub and the shaft fixing structure are the same, so the details are not described herein. However, the difference between the fan hub and the shaft center fixing structure and the above-mentioned main difference is that the combination portion 311 is a recessed hole is formed from the outer side of the first end 31. The inner side of the hole 2111 is provided with at least one protruding portion 2114, and the protruding portion 2114 is from the inner side of the hole 2111 toward the hole 2111. The center portion is convexly formed and embedded with the corresponding recessed hole, and the concave portion recessed through the outer side of the first end 31 is embedded in the protruding portion 2114 protruding inside the hole 2111 to form the hub 21 and the shaft center. 3, the structure fixed to each other is combined to greatly reduce the production cost, and the assembly is more convenient, and since the hub 21 is directly in contact with the shaft center 3, the space between the shaft core 3 and the hub 21 is increased. The combination of strength. Please refer to FIGS. 4A, 4B, and 4C for an exploded perspective view and a perspective view and a cross-sectional view of a third embodiment of the fan hub and the shaft center fixing structure, wherein the fan hub and the shaft center fixing structure are partially assembled. The relationship between the components and the components is the same as that of the fan hub and the shaft center. Therefore, the details of the fan hub and the shaft fixing structure are the same as the above-mentioned first end 31. The plurality of combining portions 311 are each a convex body, and the convex systems are formed to protrude along the outer side of the first end 31, and the convex bodies define a first joint portion 311a between each other. The grooves 2112 are recessed along the inner side of the hole 2111 and are embedded corresponding to the protrusions, and the grooves 2112 define a second joint portion 2113 therebetween. The second joint portion 2113 The first joint portion 311a is fitted to the first joint portion 311a, and the convex portion is fitted to the groove 2112, and the first joint portion 311a and the second joint portion 2113 are fitted to each other. The hub 21 and the shaft center 3 can be combined with each other without passing through the copper sleeve. Achieve significant reduction of production cost and assembly more convenient, in addition, because the hub 21 is directly train 3 disposed in contact with the fitting axis, the axis of the intake to increase the binding force between the hub 213. Please refer to FIG. 5A, FIG. 5B and FIG. 5C , which are perspective exploded view and a perspective view and a cross-sectional view of a fourth embodiment of the fan hub and the shaft center fixing structure, the fan hub and the shaft core fixing structure component. The relationship between the components and the components is the same as that of the fan hub and the shaft center. Therefore, the details of the fan hub and the shaft fixing structure are the same as the above-mentioned first end 31. The plurality of combining portions 311 are each a recessed hole, and the recessed holes are formed along the outer side of the first end 31, and the recessed holes define a third joint portion 311b between each other. The protrusions 2114 are formed to protrude from the inner side of the hole 2111 toward the center of the hole 2111, and are embedded corresponding to the holes, and the protrusions 2114 define a fourth combination with each other. The second joint portion 2115 is fitted to the third joint portion 311b, and the protrusion portion 2114 is fitted to the recessed hole, and the third joint portion 311b is coupled to the fourth joint portion 311b. After the portions 2115 are fitted to each other, the hub 21 and the shaft center 3 are not required to pass through. The sleeves can also be combined and fixed to each other, so that the production cost is greatly reduced and the assembly is more convenient. In addition, since the hub 21 is directly in contact with the shaft center 3, the shaft core 3 and the hub 21 are increased. The combined strength. Please refer to FIG. 6 , which is a perspective exploded view of the first embodiment of the present invention. As shown in the figure, a fan includes a frame 4 , a fan wheel 2 and a shaft center 3 , and the frame body 4 . The shaft seat 42 is disposed at a center of the accommodating space 41. The shaft seat 42 has a shaft hole 421, and the fan wheel 2 is pivoted with the shaft seat 42. The fan wheel 2 has a hub 21 and a plurality of blades 22. The hub 21 has a top portion 211. The top portion 211 extends axially from a side wall 212. A hole 2111 is formed in the center of the top portion 211, and the hole is formed. The inside of the 2111 is provided with at least one groove 2112. The fan blade 22 is disposed on the outer peripheral side of the side wall 212. The shaft center 3 has a first end 31 and a second end opposite to the first end 31. 32. The second end 32 is pivotally disposed in the shaft hole 421. The first end 31 has at least one combined portion 311 formed on an outer side of the first end 31 and corresponding thereto. The recess 2112 or the protruding portion 2114 is embedded. The second end 32 of the shaft 3 is provided with at least one groove 321 which is recessed along the outer side of the second end 32. Constitution. The aforementioned axle seat 42 is further provided with a certain sub-group 5 which is composed of a plurality of silicon steel sheets 51 and is wound with a plurality of coils 52. Continuing to refer to FIG. 6 and refer to FIG. 2C. Through the design of the structure of the present invention, in the embodiment, the combining portion 311 is a convex body, and the convex system is from the outer side of the first end 31. The upper surface of the hole 2111 is recessed from the inner side of the hole 2111, and is embedded with the corresponding convex body. The convex body and the groove 2112 are embedded with each other to form the hub 21 and the shaft center. 3, combined with each other, eliminating the need to use the components of the copper sleeve when the fan hub 2 hub and the shaft core 3 are combined, thereby greatly reducing the production cost; in addition, since the hub 21 is directly in contact with the shaft core 3 The fitting arrangement facilitates assembly and greatly enhances the bonding force between the shaft core 3 and the hub 21. Please refer to FIG. 7 and refer to FIG. 3C , which is a perspective exploded view of a second embodiment of the present fan. The corresponding relationship between the fan components and the components is the same as that of the fan described above. The main difference between the fan and the foregoing is that the combination portion 311 is a recessed hole, and the recessed hole is configured to be recessed from the outer side of the first end 31, and the inner side of the hole 2111 is provided. There is at least one protruding portion 2114, and the protruding portion 2114 is formed from the inner side of the hole 2111 toward the center of the hole 2111, and is embedded with the corresponding concave hole, and penetrates the concave hole and the protruding portion 2114. The two sides of the hub 21 and the shaft core 3 are fixed to each other, so that the components of the copper sleeve are required to be used when the hub 2 hub and the shaft core 3 are combined, thereby greatly reducing the production cost; in addition, due to the hub 21 is directly placed in contact with the shaft center 3 to facilitate assembly, and the bonding force between the shaft core 3 and the hub 21 can be greatly enhanced. Please refer to FIG. 8 and FIG. 4C as a perspective exploded view of the third embodiment of the present invention. The corresponding relationship between the fan components and the components is the same as that of the fan described above. It is not described here again, but the most important difference between the fan and the foregoing is that the first end 31 has a plurality of combining portions 311, each of the combining portions 311 is a convex body along the first end. The outer surface of the outer surface of the hole 2111 defines a first joint portion 311a, and the groove 2112 is recessed along the inner side of the hole 2111, and is embedded corresponding to the convex body, and The concave bodies define a second joint portion 2113 therebetween, and the second joint portion 2113 is fitted to the opposite first joint portion 311a, and the convex body is disposed to be engaged with the groove 2112. After the first joint portion 311a and the second joint portion 2113 are fitted to each other, the hub 21 and the shaft core 3 can be coupled to each other without passing through the copper sleeve, thereby reducing production cost and facilitating assembly. The hub 21 is directly disposed in contact with the shaft core 3 to increase the shaft center. 3 The bonding force with the hub 21. Finally, please refer to FIG. 9 and refer to FIG. 5C, which is a perspective exploded view of a fourth embodiment of the present fan. The corresponding relationship between the fan components and the components is the same as that of the fan described above. Therefore, the main difference between the fan and the foregoing is that the first end 31 has a plurality of combined portions 311, and each of the combined portions 311 is a recessed hole. The outer side of the first end 31 is recessed, and the recesses define a third joint portion 311b. The protrusions 2114 are formed along the inner side of the hole 2111 toward the center of the hole 2111, and A fourth joint portion 2115 is defined between the protrusions 2114, and the fourth joint portion 2115 is corresponding to the third joint portion 311b. After the protruding portion 2114 is fitted into the recessed hole, and the third joint portion 311b and the fourth joint portion 2115 are fitted to each other, the hub 21 and the shaft core 3 can be fixed to each other without the conventional copper sleeve. The production cost is reduced and the assembly is convenient. In addition, since the hub 21 is directly connected to the shaft center 3 Fitting setting, into the axial coupling force to increase between 213 and hub. As described above, the present invention has the following advantages compared with the conventional ones: 1. The production cost is greatly reduced; 2. The assembly is more convenient; 3. The combination of the hub and the shaft is greatly increased. The present invention has been described in detail above, but the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited. That is, all changes and modifications made in accordance with the scope of this creation application shall remain covered by the patents of this creation.