1325469 九、發明說明： 【發明所屬之技術領域】 本發明係涉及一種散熱風扇，特別係涉及一種應用於 電子產品上之散熱風扇。 【先前技術】 現今精密電子產品之功率日益提高，高功率之電子產 品使用時不可避免地要產生高溫，從而對電子產品正常之 運行造成威脅，因此諸多電子產品中都設有風扇以對電子 產品進行散熱從而保證電子產品之正常使用。 習知風扇結構通常包括有定子、扇輪、基座。其中定 子包含有上、下磁極片以及置於上、下磁極片之間之線圈， 扇輪之輪轂内緣設有磁鐵環，於輪轂中心設有一轉軸，基 座之中央設置轴套與軸承，該轉軸收容在轴套内與軸承相 框接，定子即固定在基座上並環設在軸套之周圍。然㈤定 子置於基座上時與轉軸及磁鐵環很難保持有較好之同心 度，從而影響定子與磁鐵環之間之磁感應配置，難以提高 風扇運轉時之穩定性及效能。另外定子之極數及相數配置 少，又不易增加，同時存在有換相角度之死點問題，使整 個散熱風扇之運轉穩定性不足。 【發明内容】 有鑒於此，有必要提供一種具有良好之同心度及運轉 穩定性之散熱風扇。 一種散熱風扇，包括基座、扇輪、磁鐵環及環形線圈 裝置，該基座上設有中空軸管，該扇輪具有輪轂及設於輪 6 1325469 轂中心之轉軸，該環形線圈裝置包括定子架及繞設於定子 架外緣上之線圈，該定子架之内緣上環設有成對設置之複 數極爪片，中空軸管外周之基座上設有與中空軸管同心設 置之凸台，該環形線圈裝置套設於基座之凸台上與中空軸 管成同心配置，且該環形線圈裝置與中空軸管之間形成一 環形空間，該磁鐵環固定於轉軸上並置於所述環形空間内。 一種散熱風扇，包括基座、扇輪、磁鐵環、定子架及 繞設於定子架上之線圈，該基座上設有中空軸管，該線圈 通電產生之磁場與磁鐵環相互作用而驅動扇輪運轉，該基 座于中空軸管之外周設置有與中心軸管同心之凸台，該定 子架裝設於該凸台上，並於定子架與中空軸管之間形成一 環形空間，該磁鐵環置於所述環形空間内。 與習知散熱風扇相比，上述散熱風扇之中空軸管外周 之基座上設有同心設置之凸台，使環形線圈裝置套設於基 座之凸台上與中空軸管成同心配置，並於環形線圈裝置與 中空軸管之間形成一環形空間，磁鐵環直接固定於轉軸 上，並置於中空軸管與環形線圈裝置之間形成之環形空間 内，這一特有結構能提高磁鐵環與環形線圈之同心度配 置，並使磁鐵環與環形線圈裝置内之極爪片呈精轉磁感應 配置，從而可提升散熱風扇運轉之效能及穩定性。 【實施方式】 請參閱圖1及圖2，為本發明散熱風扇之第一實施例， 該散熱風扇包括基座31、環形線圈裝置32、扇輪33及磁 鐵環34。 7 中*31呈圓形’其中央向上凸設有一中空軸管311， ^ 311上下兩端處之内經稍大於中空軸管3U中間 二内後，從而在中空軸管311 &兩蠕處各形成一個用於 ^幸由承312之台階（未標坡），軸承3U可以是滾珠或者 中介^、他一型之轴承’遠實施例中軸承312為滾珠軸承。 :^管311之外周於基座31上形成—圓環形凸台313, :、盘:313與中空轴管3U呈同心設置，即凸台313之圓 —;空軸官圓心重合。中空軸管311下端還設有 3風335 ’ 5亥下盖335抵靠在中空軸管311下端之軸承 12 並將中空軸f 311之下端封閉。 敕^衣形線圈裝置32可為—％或由多組疊置固定而成一個 ^體，該實施例中為上、下Μ。每_組環形_裝置^ 匕括定子架及環向繞設於定子架外緣上之_ 324。定子竿 之兩端向外凸伸，從而於定子架之兩個端部之間形成一個 用於繞線之開放式空間，線圈324即置於定子架外緣上之 邊空間内。定子架包括呈上下交錯配置形態之複數對L形 之導磁環形片322’每-導磁環形片322向定子架之内緣環 面-弓折延伸形成極爪片321，該等極爪片321呈等腰三角形 狀，其末端延伸至另一端之導磁環形片322處，上、下導 磁環形片322延伸形成之極爪片321呈交替排列從而佈滿 定子架之整個内緣環面。極爪片321對應線圈324也形成 上下兩組，並王錯位配置以增加相位磁區，從而重疊磁 區角度以排除死點。導磁環形片322可由補製成，且其 極爪片321之間之空隙由絕緣塑性材料填滿，使上下兩個 ，磁％形片322固設成一體，並形成由塑性材料製成之外 環緣323，极a 九 m '、、’泉圈324直接繞設定位，形成所述定子架。導1325469 IX. Description of the Invention: [Technical Field] The present invention relates to a heat dissipation fan, and more particularly to a heat dissipation fan applied to an electronic product. [Prior Art] Nowadays, the power of precision electronic products is increasing, and high-power electronic products inevitably generate high temperatures, which poses a threat to the normal operation of electronic products. Therefore, many electronic products have fans for electronic products. Heat dissipation to ensure the normal use of electronic products. Conventional fan structures typically include a stator, a fan wheel, and a base. The stator comprises upper and lower pole pieces and a coil disposed between the upper and lower pole pieces. The inner edge of the hub of the fan wheel is provided with a magnet ring, a rotating shaft is arranged at the center of the hub, and a sleeve and a bearing are arranged at the center of the base. The rotating shaft is received in the sleeve and connected to the bearing frame, and the stator is fixed on the base and is arranged around the sleeve. However, when the stator is placed on the pedestal, it is difficult to maintain good concentricity with the rotating shaft and the magnet ring, thereby affecting the magnetic induction configuration between the stator and the magnet ring, and it is difficult to improve the stability and performance of the fan during operation. In addition, the number of poles and the number of phases of the stator is small, and it is not easy to increase. At the same time, there is a dead point problem of the commutation angle, so that the running stability of the entire cooling fan is insufficient. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a heat dissipation fan having good concentricity and operational stability. A cooling fan includes a base, a fan wheel, a magnet ring and a toroidal coil device. The base is provided with a hollow shaft tube having a hub and a rotating shaft disposed at a hub center of the wheel 6 1325469, the toroidal coil device including a stator And a coil wound around the outer edge of the stator frame, the inner ring of the stator frame is provided with a plurality of pole pieces arranged in pairs, and the base of the outer circumference of the hollow shaft tube is provided with a boss concentrically arranged with the hollow shaft tube The loop coil device is sleeved on the boss of the base and is disposed concentrically with the hollow shaft tube, and an annular space is formed between the loop coil device and the hollow shaft tube, and the magnet ring is fixed on the rotating shaft and placed in the ring Within the space. A cooling fan includes a base, a fan wheel, a magnet ring, a stator frame and a coil wound around the stator frame. The base is provided with a hollow shaft tube, and the magnetic field generated by the coil interacts with the magnet ring to drive the fan. The wheel is disposed on the outer circumference of the hollow shaft tube and has a boss concentric with the central shaft tube. The stator frame is mounted on the boss and forms an annular space between the stator frame and the hollow shaft tube. A magnet ring is placed in the annular space. Compared with the conventional cooling fan, the base of the outer circumference of the hollow shaft tube of the cooling fan is provided with concentrically arranged bosses, so that the toroidal coil device is sleeved on the boss of the base and is concentrically arranged with the hollow shaft tube, and An annular space is formed between the toroidal coil device and the hollow shaft tube, and the magnet ring is directly fixed on the rotating shaft and placed in an annular space formed between the hollow shaft tube and the toroidal coil device. This unique structure can improve the magnet ring and the ring shape. The concentricity of the coils is arranged, and the magnet ring and the pole pieces in the toroidal coil device are in a fine magnetic induction configuration, thereby improving the performance and stability of the cooling fan. [Embodiment] Please refer to FIG. 1 and FIG. 2, which is a first embodiment of a heat dissipation fan according to the present invention. The heat dissipation fan includes a base 31, a toroidal coil device 32, a fan wheel 33, and a magnet ring 34. 7 *31 is circular [the center of the upper convex body is provided with a hollow shaft tube 311, ^ 311 at the upper and lower ends is slightly larger than the middle of the hollow shaft tube 3U, so that the hollow shaft tube 311 & Each of them forms a step for unfortunately bearing 312 (unsloped), the bearing 3U may be a ball or an intermediate type, and the bearing of the type 1 is a ball bearing in the distal embodiment. The outer circumference of the tube 311 is formed on the base 31 by a circular boss 313, and the disk: 313 is disposed concentrically with the hollow shaft tube 3U, that is, the circle of the boss 313; the center of the hollow axis coincides. The lower end of the hollow shaft tube 311 is further provided with a bearing 3 for urging against the lower end of the hollow shaft tube 311 and closing the lower end of the hollow shaft f 311. The 衣^ garment-shaped coil device 32 may be -% or fixed by a plurality of sets to form a body, in this embodiment, upper and lower jaws. Each group of ring_devices includes a stator frame and a ring _324 disposed on the outer edge of the stator frame. Both ends of the stator 向外 project outwardly to form an open space for winding between the two ends of the stator frame, and the coil 324 is placed in the side space on the outer edge of the stator frame. The stator frame includes a plurality of L-shaped magnetically conductive annular segments 322' in an up-and-down staggered configuration. Each of the magnetically conductive annular segments 322 extends toward the inner edge of the stator frame to form a pole piece 321 which is formed by a pole piece 321 The 321 is in the shape of an isosceles triangle, the end of which extends to the other end of the magnetically conductive annular piece 322, and the pole pieces 321 extending from the upper and lower magnetically conductive annular pieces 322 are alternately arranged to cover the entire inner circumferential surface of the stator frame. . The pole piece 321 corresponding to the coil 324 also forms the upper and lower two groups, and the king is misaligned to increase the phase magnetic zone, thereby overlapping the magnetic zone angle to eliminate the dead point. The magnetically conductive annular piece 322 can be made up, and the gap between the pole pieces 321 is filled with an insulating plastic material, so that the upper and lower two, the magnetic % piece 322 is integrally fixed and formed of a plastic material. The outer ring 323, the pole a nine m ', and the 'spring ring 324 are directly wound around the set position to form the stator frame. guide
磁環形片390 > & - J ηκ 之内徑比基座31上之凸台313之外徑稍大， =1 =環形線圈裝置32剛好套設在基座31之凸台313 /二’、令ι轴管311呈同心配置。由於中空軸管311之 形線圈裝置32之内徑要小，從而在環形線圈裝置 ”空輛管311之間形成一環形空間32〇。 扇輪· θ , 、卜 具有一罩設於環形線圈裝置32周緣之輪轂 复數個形成於輪轂332外緣之扇葉331及—設於輪轂 =2中心之轉軸333。轉轴收容在基座&上之中空軸 内亚與轴承312相接合。轉轴333之自由端抵靠在 山 上且有一扣環334將轉軸333扣在中空轴管311 下端之軸承312上，從而將轉軸333固定在中空軸管311 内0 —磁鐵環34是由永久磁鐵材料製成，並由轉子架341固 疋在扇輪33之轉軸333上，並固定在％ 裝後之磁鐵環34置於環形線圈裝置32與中空轴管 間之壞形空間320内。磁鐵環34之圓周方向上置有多極對 :區’亚與環形線圈裝置32内環面上之極爪片321 f己置。轉子架糾呈圓形，其直徑與磁鐵環Μ之内徑才目 ==之t心處設有一直徑與轉軸333之直徑相 “轉子架341即通過圓孔套設固^在轉轴333 i 則與轉子架341之外緣相固接，從而使磁鐵 % 34與轉軸333固定連接在一起。 鐵 1325469 組裝時，軸承312置於基座31之中空軸管311内，環 . 形線圈I置32套設在基座31之凸台313上，環形線圈裝 • 置32之下端與基座31相抵靠，環形線圈裝置32之内緣下 端與凸台3i3之外緣上端相抵靠，考慮到配合公差以及加 =工藝，環形線圈裝置32之内緣與凸台313之外緣會有一 疋之間隙。借助轉子架341 ’磁鐵環34固定在扇輪％之轉 軸333上，轉軸333收容在基座31之中空軸管311内，並 , 用扣環334將轉轴333之自由末端扣固在中空軸管311内 :端之軸承312上，且將下蓋335固定在基座31之中空軸 官311内之末端處用以承載轉軸333。同時，磁鐵環％收 容於環形線圈裝置32與中空軸管311之間形成之環形空間 320内，輪轂332則將環形線圈裝置32包容於其内。由於 凸台313之設置，使環形線圈裝置32能與中空軸管311之 同心度較高，進而使得裝配在中空軸管311内之轉軸333 與裝配在環形空間320内之磁鐵環34能與環形線圈裝置32 . 之同心度較高，使磁鐵環34與環形線圈裝置32呈較精確 之磁感應配置，從而提高風扇運轉時之穩定性。通電時， 環形線圈裝置32產生交變磁場，並作用於磁鐵環34，從而 驅動轉軸333轉動，繼而帶動罩設於環形線圈裝置％周緣 之扇輪33旋轉。 上述散熱風扇可預先通過轉子架341將磁鐵環34固定 於扇輪33之轉軸333上，先校準同心度，另由環形線圈裝 置32套設在基座31之凸台313周圍與中空轴管311呈同 心配置开》成環形空間320 ’並校準同心度，然後將轉軸333 10 1325469 收容在中空輛管311内，使磁鐵環34置於環形空間32〇内， 而與環形線圈|置32内環面上之極爪片321呈磁感應配 置，藉此提供一精准度高之模組化配置組裝結構，從而提 高散熱風扇組裝良率及運轉之效能與穩定性。 另外’該散熱風扇利用環形線圈裝置32之導磁環形片 322向疋子架之内緣環面彎折延伸而成之複數個極爪片321 相向對稱設置，且兩組極爪片321呈相對錯位配置，使得 %形線圈裝置32之極數與相數配置大幅增加，並重疊磁區 角度以消除磁鐵環3 4之轉動死角，從而可提升散熱風扇運 轉日守之效能與穩定性。同時，由於環形線圈裝置32上之定 =木可直接繞設線圈324，能達到簡化定子結構、簡化繞線 ‘程排除線圈繞设損傷與提升組裝作業良率之效果。 如圖3至圖6所示為本發明散熱風扇另一實施例。其 中、圖3為該散熱風扇之組合剖示圖，圖4為該散熱風扇 之分解剖示圖，圖5為該散熱風扇之立體組合示意圖，圖6 2 =散熱風扇之立體分解示意圖。該散熱風扇之結構與上 述實施例中之散熱風扇結構基本上一致，在此不再贅述， _之處疋該政熱風扇有一扇框314。該扇框314整體呈方 形，其底部與基座31相連，且從基座31之底部向上 擴展至扇輪33之外周。 。如圖7所示為本發明散熱風扇又一實施例之分解剖示 :同樣該散熱風扇之結構與第一實施例中之散熱風扇結 口也大致一樣，不同之處在於該實施例中之中空軸管 、在其底部設有一個台階部用以放置下蓋335。中空軸管 11 1325469 之兩個轴承312b為滑動細承，通過過盈配 中空軸官311b内之上下兩端。環形線圈裝置义在 形片322與線圈324之外周還套設有一具有=闕 座325,殼座325將線圈324 R谱 丨P用之殼 - ㈣324及導磁環形片322外、 =而將線圈324於外環緣323 —側之激磁作用弓。^刀覆 =片322内以進—步強化極爪片321之 入導 而提兩風扇運轉時之效能。 乍用，從The inner diameter of the magnetic ring piece 390 > & J ηκ is slightly larger than the outer diameter of the boss 313 on the base 31, =1 = the toroidal coil device 32 is just placed on the boss 313 / 2 of the base 31 And the ι shaft tube 311 is concentrically arranged. Since the inner diameter of the coil device 32 of the hollow shaft tube 311 is small, an annular space 32 is formed between the annular coil device "empty tube 311. The fan wheel · θ , , has a cover provided in the toroidal coil device The 32-circle hub has a plurality of blades 331 formed on the outer edge of the hub 332 and a shaft 333 disposed at the center of the hub=2. The shaft is coupled to the bearing 312 in the hollow shaft of the base & The free end of the 333 abuts against the mountain and has a buckle 334 to fasten the rotating shaft 333 to the bearing 312 at the lower end of the hollow shaft tube 311, thereby fixing the rotating shaft 333 in the hollow shaft tube 311. The magnet ring 34 is made of a permanent magnet material. And the rotor frame 341 is fixed on the rotating shaft 333 of the fan wheel 33, and the magnet ring 34 fixed to the % is placed in the bad space 320 between the toroidal coil device 32 and the hollow shaft tube. A multi-pole pair is disposed in the circumferential direction: the pole piece 321 f of the inner ring surface of the sub-region and the toroidal coil device 32 is disposed. The rotor frame is rounded and the diameter of the rotor ring is the same as the inner diameter of the magnet ring = == The center of the t is provided with a diameter and the diameter of the rotating shaft 333. "The rotor frame 341 passes through the circle. Solid ^ sleeved shaft 333 in the I frame 341 and the outside edge of the rotor fixedly connected, so that 34% of the magnet and the rotary shaft 333 fixedly connected together. When the iron 1325469 is assembled, the bearing 312 is placed in the hollow shaft tube 311 of the base 31, and the ring-shaped coil I is placed 32 on the boss 313 of the base 31, and the lower end of the toroidal coil assembly 32 and the base 31 are provided. Abutting, the lower end of the inner edge of the toroidal coil device 32 abuts the upper end of the outer edge of the boss 3i3, and the inner edge of the toroidal coil device 32 has a gap with the outer edge of the boss 313 in consideration of the fitting tolerance and the addition process. . The rotor ring 341 'the magnet ring 34 is fixed on the shaft 333 of the fan wheel. The shaft 333 is received in the hollow shaft tube 311 of the base 31, and the free end of the shaft 333 is fastened to the hollow shaft by the buckle 334. Inside the tube 311 is a bearing 312 at the end, and the lower cover 335 is fixed at the end of the hollow shaft 311 of the base 31 for carrying the rotating shaft 333. At the same time, the magnet ring % is housed in an annular space 320 formed between the toroidal coil assembly 32 and the hollow shaft tube 311, and the hub 332 houses the toroidal coil assembly 32 therein. Due to the arrangement of the boss 313, the toroidal coil device 32 can be concentric with the hollow shaft tube 311, so that the rotating shaft 333 assembled in the hollow shaft tube 311 and the magnet ring 34 fitted in the annular space 320 can be ring-shaped. The high concentricity of the coil device 32 makes the magnet ring 34 and the toroidal coil device 32 have a more precise magnetic induction configuration, thereby improving the stability of the fan during operation. When energized, the toroidal coil device 32 generates an alternating magnetic field and acts on the magnet ring 34 to drive the rotating shaft 333 to rotate, which in turn drives the fan wheel 33 disposed on the periphery of the toroidal coil device to rotate. The heat dissipating fan can fix the magnet ring 34 to the rotating shaft 333 of the fan wheel 33 through the rotor frame 341 in advance, and first align the concentricity, and the ring coil device 32 is sleeved around the boss 313 of the base 31 and the hollow shaft tube 311. Concentrically arranged to form an annular space 320' and calibrate the concentricity, then the rotating shaft 333 10 1325469 is housed in the hollow tube 311, so that the magnet ring 34 is placed in the annular space 32〇, and the toroidal coil | The pole piece 321 on the surface is magnetically sensed, thereby providing a highly accurate modular configuration assembly structure, thereby improving the assembly efficiency and efficiency and stability of the cooling fan assembly. In addition, the heat dissipating fan is symmetrically disposed by a plurality of pole claw pieces 321 which are formed by bending the inner magnetic ring piece 322 of the loop coil device 32 and extending toward the inner edge of the rafter frame, and the two sets of the pole pieces 321 are opposite. The misalignment configuration greatly increases the number of poles and the number of phases of the %-shaped coil device 32, and overlaps the angle of the magnetic domain to eliminate the rotational dead angle of the magnet ring 34, thereby improving the performance and stability of the cooling fan. At the same time, since the coil 324 can be directly wound around the loop coil device 32, the stator structure can be simplified, the winding can be simplified, and the effect of eliminating the coil winding damage and improving the assembly work rate can be achieved. Another embodiment of the heat dissipation fan of the present invention is shown in FIGS. 3 to 6. FIG. 3 is a cross-sectional view of the heat dissipating fan, FIG. 4 is an exploded perspective view of the heat dissipating fan, and FIG. 5 is a three-dimensional exploded view of the heat dissipating fan, and FIG. The structure of the heat dissipating fan is substantially the same as that of the heat dissipating fan in the above embodiment, and details are not described herein again. The hot air fan has a frame 314. The sash frame 314 has a square shape as a whole, and its bottom portion is connected to the base 31 and extends upward from the bottom of the base 31 to the outer circumference of the fan wheel 33. . FIG. 7 is an exploded view showing still another embodiment of the heat dissipation fan of the present invention: the structure of the heat dissipation fan is also substantially the same as that of the heat dissipation fan in the first embodiment, except that the hollow in the embodiment is hollow. The shaft tube is provided with a step at the bottom thereof for placing the lower cover 335. The two bearings 312b of the hollow shaft tube 11 1325469 are sliding pins that pass through the upper and lower ends of the hollow shaft 311b. The toroidal coil device is further provided with a socket 325 outside the shape piece 322 and the coil 324, and the housing 325 is used for the coil 324 R to be used for the outer casing - (four) 324 and the magnetically conductive annular piece 322, and the coil is 324 is on the outer ring edge 323 - the side of the excitation bow. ^Knife Coverage = In the film 322, the effect of the two-fan operation is improved by step-by-step enhancement of the entry of the pole piece 321 . Use, from
綜上所述，本發明符合發日月㈣m 專利申請。惟以上料者料本發明之較 ^=出 热悉本純藝之人士，在纽本發明㈣所作凡 ，變化：皆應涵蓋於以下之申請專利範圍内。、攻Μ 【圖式簡單說明】 圖1為本發明散熱風扇一實施例之組合剖示圖。 圖2為圖1之分解示意圖。In summary, the present invention is in compliance with the Japanese Patent Application (M). However, the above-mentioned materials are intended to be included in the following patents. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a combined cross-sectional view of an embodiment of a cooling fan of the present invention. Figure 2 is an exploded perspective view of Figure 1.
圖3為本發明散熱風扇另一實施例之組合剖示圖。 圖4為圖3之分解示意圖。 圖5為圖3所示散熱風扇之立體組合示意圖。 圖6為圖5所示散熱風扇之立體分解示意圖。 圖7為本發明散熱風扇又一實施例之分解剖示圖。 【主要元件符號說明】 中空軸管 311、311b 凸台 313 環形線圈裝置32 極爪片 321 基座 31 轴承 312、312b 扇框 314 環形空間 们〇 12 1325469 導磁環形片 322 外環緣 323 線圈 324 殼座 325 扇輪 33 扇葉 331 輪轂 332 轉車由 333 扣環 334 下蓋 335 磁鐵環 34 轉子架 341 133 is a combined cross-sectional view showing another embodiment of the heat dissipation fan of the present invention. 4 is an exploded perspective view of FIG. 3. FIG. 5 is a schematic perspective view of the heat dissipation fan of FIG. 3 . FIG. 6 is a perspective exploded view of the heat dissipation fan shown in FIG. 5. FIG. 7 is an exploded perspective view showing still another embodiment of the heat dissipation fan of the present invention. [Main component symbol description] Hollow shaft tube 311, 311b boss 313 ring coil device 32 pole piece 321 base 31 bearing 312, 312b fan frame 314 annular space 〇 12 1325469 magnetic ring piece 322 outer ring 323 coil 324 Housing 325 Fan wheel 33 Fan blade 331 Hub 332 Transfer by 333 Buckle 334 Lower cover 335 Magnet ring 34 Rotor frame 341 13