200838396 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，特別係關於一種用於為 電子元件進行散熱之散熱風扇及其製造方法。 【先前技術】 隨著電子資訊業之不斷發展，電子元件（尤為中央處 理器）之運行頻率不斷提升，進而電子元件所產生之熱量 亦隨之增多，溫度不斷升高，嚴重威脅著電子元件運行I • 性能’為保證電子元件之正常運作，通常在電子元件表面 加裝一散熱器，於散熱器上安裝一散熱風扇輔助電子元件 散熱。 習知散熱風扇包括一中心具有中柱之扇框，固定於該 中柱外之定子、嵌設於中柱内之軸承及被該軸承支撐之轉 子，該中柱自扇框中央向上延伸，中柱内設有一中心孔以 收容該軸承，軸承中央設有一軸孔，轉子包括一輪轂、環 ⑩ °又於輪权外緣之複數扇葉及一自輪轂中央向下延伸之轉 軸，該轉軸可旋轉地收容於軸承之轴孔内，製造及組裝時， 先成型扇框；接著利用器具將軸承以緊配合之方式壓入至 該扇框之中柱之中心孔内；然後將定子套設於中柱上；再 仗中柱之底端裝入一扣環，並將轉子之轉軸從中柱頂端插 入與扣環卡扣；最後將耐磨片置入轉軸末端，利用油封蓋 將中柱之底端密封，並封入適量之潤滑油，而組裝成散熱 風扇。通過轉子之旋轉帶動空氣流動產生強制氣流，對發 熱元件進行散熱。 6 200838396 上述散熱風扇之製作過程中，軸承需要用較大力量麼 入扇框之中柱内，轴承之外壁與中柱之内壁產生較大之摩 擦力，由於扇框是由塑性材料製成，較容易變形，軸承在 安裝至扇框之組裝過程中，會出現軸承與中柱之間存在組 合之公差及同心度專問題，從而軸承與中柱達不到緊密結 合之目的，且無法確保軸承與中柱之間良好之同心度，導 致在風扇實際之運轉過程中由於同心度不好而產生晃動或 震動，導致風扇不能平穩運轉，進而產生噪音甚至還會過 早地損壞轴承，使得風扇之品質及使用壽命難以得到保 證，另一方面，在風扇組裝過程中，所需之組裝步驟亦較 多，組裝效率不理想，因此有必要克服上述問題。 【發明内容】 為解決散熱風扇製作&組裝過程中軸承與扇框之同心 度及組裝频繁多之問題，有必要提供—轉決上述問題 之散熱風权製造方法及由該方法製作之—種散熱風扇。 -種散熱風扇，包括巾央設有巾柱之—扇框，套設於 中柱外之-定子，固定於中_之—軸㈣統以及被轴承 系、、充支撐之轉子’該軸承系統是在成型扇框之過程中一 體固定連接於扇框之中柱上。 ，種散熱風扇之製造方法，包括以下步驟：提供一套 製作完成之轴m絲承系統之頂端設有—密封蓋； 將該軸承系統置於—成型扇框之模具内，通過注塑一體形 成扇框’絲承线在細扇框之過程巾與扇框之一中柱 體肷入固定連接，安裝—定子至該中柱之外圍；取下設 7 200838396 於軸承系統頂端之密封蓋；及安裝_轉子至_承系統内。 3散誠扇之製造方法，包細下步驟：提供一套 衣作凡成之軸承錢’該軸承系統之頂端設有—密封蓋； 將該軸承系統置於-成型扇框之模具内，通過注塑一體形 成扇框，將轴承系統在成型扇框之過程中與扇框之一中柱 一體嵌入固定連接；取下設於軸承系統頂端之密封蓋；安 裝-定子魏巾柱之外圍；及安裝—轉子至該麵系統内。 與習知技術相比，本發明所述散熱風扇之製造方法 中，將一套完整且已製作完成之軸承系統置入模具中，使 得在注塑成型扇框之過程中，將軸承系統與扇框之中柱一 體喪入©定連接，可杨防止事後在安錄承之過程中需 要用較大力量將軸承壓入扇框，而造成之組合公差及同心 度等問題，有效地提高結構可靠度及改善風扇性能；同時’ 在成型完扇框之後，只需三個步驟即可完成整個風扇之組 裝，從而有效地簡化組裝之步驟，提高組裝效率及降低組 裝成本。 【實施方式】 下面參照附圖，結合實施例對本發明作進一步說明。 如圖1所示’本實施例之散熱風扇包括一扇框1〇、一設 於該扇框10中央之轴承糸統20，一套設於轴承系統2〇外之 定子30以及一環繞於定子30外圍之轉子40。 在本實施例中’該扇框10包括一圓環形之外框12、一 位於該外框12中央之支撐部14及複數連接於外框12與支撐 部14之間之肋條13。該支撐部14呈圓盤狀，其中間部分略 8 200838396 向下凹陷形成一圓盤形收容部142。該收容部142之中央向 上延伸形成一中柱15，該中柱15呈圓筒狀，該軸承系統20 之底端嵌入固定在該中柱15内。中柱15之外壁面上沿中柱 15之徑向向外凸伸形成至少一方柱狀凸起151，中柱15之内 壁面上向中柱15内之中心位置凸設形成一凸緣152，如圖2 所示，該凸緣152呈圓環狀，一體形成於中柱15上。 該定子30套設於轴承系統20之外圍，該定子3〇包括一 環形之電路板31及與該電路板31電性連接之一電樞繞組。 該電柩繞組包括上、下絕緣架32a、32b、夾置於該上、下 絕緣架32a、32b之間之複數碎鋼片33及縷繞於該上、下絕 緣架32a、32b上之線圈34。該定子30之中央形成一穿孔35， 該穿孔35可供軸承系統2〇穿設。其中篇電路板31之外徑大 小與扇框10中央之收容部142之大小大致相同，該電路板31 之中央設有一穿孔310，該穿孔310之邊緣向内凹設形成一 方柱形缺口312，該缺口312之大小與中柱15之外壁面上之 凸起151之大小相對應。 該轉子40包括一輪穀41、環設於輪轂41之複數扇葉 42、收容於輪轂41内之環形磁鐵48、夾設於環形磁鐵48與 輪轂41内壁面之間之絕緣殼罩49及自輪轂41中央向下延伸 之轉軸45(請參圖10)。 如圖2及圖3所示，該軸承系統20之底端嵌入固定於該 中柱15内，轴承系統20之中央形成一用以收容一轉轴Μ之 轴孔22，該轉子40之轉轴45可旋轉地收容于該軸孔22内， 該軸孔22之底端設置一耐磨片26，該轴承系統2〇之内部于 9 200838396200838396 IX. Description of the invention: • Technical field to which the invention pertains - The present invention relates to a heat dissipation fan, and more particularly to a heat dissipation fan for dissipating heat of an electronic component and a method of manufacturing the same. [Prior Art] With the continuous development of the electronic information industry, the operating frequency of electronic components (especially the central processing unit) is increasing, and the heat generated by electronic components is also increasing, and the temperature is rising, which seriously threatens the operation of electronic components. I • Performance 'To ensure the normal operation of electronic components, a heat sink is usually installed on the surface of the electronic component, and a cooling fan is mounted on the heat sink to assist the electronic component to dissipate heat. The conventional cooling fan includes a fan frame centered on the center pillar, a stator fixed to the center pillar, a bearing embedded in the center pillar, and a rotor supported by the bearing, the middle pillar extending upward from the center of the fan frame, A central hole is arranged in the column to receive the bearing, and a shaft hole is arranged in the center of the bearing. The rotor comprises a hub, a plurality of blades of the ring 10° and the outer edge of the wheel, and a rotating shaft extending downward from the center of the hub. Rotatingly received in the shaft hole of the bearing, in the manufacture and assembly, the fan frame is first formed; then the bearing is pressed into the central hole of the column in the frame by means of the fitting; then the stator is sleeved on On the middle column; a bottom ring is inserted into the bottom end of the middle column, and the rotating shaft of the rotor is inserted from the top end of the middle column with the buckle; finally, the wear piece is placed at the end of the rotating shaft, and the bottom of the middle column is closed by the oil cover. The end is sealed and sealed with a proper amount of lubricating oil to be assembled into a cooling fan. The rotation of the rotor drives the air flow to generate a forced air flow to dissipate heat from the heating element. 6 200838396 In the manufacturing process of the above cooling fan, the bearing needs to be inserted into the column of the fan frame with a large force. The outer wall of the bearing and the inner wall of the middle column generate a large friction force. Since the fan frame is made of plastic material, It is easy to deform. During the assembly process of the bearing to the frame, there will be a combination of tolerance and concentricity between the bearing and the center column, so that the bearing and the center column cannot be closely combined, and the bearing cannot be ensured. Good concentricity with the center column, causing sloshing or vibration due to poor concentricity during the actual operation of the fan, resulting in the fan not running smoothly, causing noise and even prematurely damaging the bearing, making the fan Quality and service life are difficult to guarantee. On the other hand, in the fan assembly process, more assembly steps are required, and assembly efficiency is not satisfactory, so it is necessary to overcome the above problems. SUMMARY OF THE INVENTION In order to solve the problem of concentricity and assembly of the bearing and the fan frame during the assembly process of the cooling fan, it is necessary to provide a method for manufacturing the heat-dissipating wind right that turns to the above problems and a method for producing the same Cooling fan. - a kind of cooling fan, including a towel frame with a towel column, a fan frame set outside the middle column, a stator fixed to the middle_shaft (four) system, and a bearing system, a supporting rotor" It is integrally fixedly connected to the column in the fan frame during the process of forming the fan frame. The manufacturing method of the cooling fan comprises the following steps: providing a set of finished shafts of the shaft wire bearing system with a sealing cover; placing the bearing system in the mold of the forming fan frame, forming a fan by injection molding The frame's wire is in a fixed connection between the process of the thin fan frame and the column of the fan frame, and the stator is attached to the periphery of the middle column; the sealing cover of the top of the bearing system is removed from the 7200838396; _Rotor to the system. 3Daicheng fan manufacturing method, including the following steps: provide a set of clothing for Fancheng bearing money 'The top of the bearing system is provided with a sealing cover; the bearing system is placed in the mold of the forming fan frame, through The injection molding integrally forms a fan frame, and the bearing system is integrally fixedly connected with the middle column of the fan frame in the process of forming the fan frame; the sealing cover disposed at the top of the bearing system is removed; the periphery of the mounting-stator Wei towel column is installed; - The rotor is inside the surface system. Compared with the prior art, in the manufacturing method of the heat dissipation fan of the present invention, a complete and completed bearing system is placed in the mold, so that the bearing system and the fan frame are in the process of injection molding the fan frame. In the middle of the column, the whole connection is lost. It can prevent the problem of the combination of tolerance and concentricity caused by the need to use large force to press the bearing into the fan frame during the process of the recording. And improve the performance of the fan; at the same time, after the fan frame is formed, the assembly of the entire fan can be completed in three steps, thereby effectively simplifying the assembly steps, improving the assembly efficiency and reducing the assembly cost. [Embodiment] Hereinafter, the present invention will be further described with reference to the accompanying drawings. As shown in FIG. 1 , the heat dissipation fan of the present embodiment includes a frame 1 , a bearing system 20 disposed at the center of the frame 10 , a stator 30 disposed outside the bearing system 2 , and a surround surrounding the stator 30 peripheral rotor 40. In the present embodiment, the frame 10 includes an annular outer frame 12, a support portion 14 at the center of the outer frame 12, and a plurality of ribs 13 connected between the outer frame 12 and the support portion 14. The support portion 14 has a disk shape, and the middle portion thereof is slightly recessed 200838396 to form a disc-shaped receiving portion 142. The center of the receiving portion 142 extends upward to form a center pillar 15 having a cylindrical shape. The bottom end of the bearing system 20 is embedded and fixed in the center pillar 15. An outer wall surface of the center pillar 15 protrudes outward in the radial direction of the center pillar 15 to form at least one columnar protrusion 151, and an inner wall surface of the center pillar 15 protrudes toward a center of the center pillar 15 to form a flange 152. As shown in FIG. 2, the flange 152 has an annular shape and is integrally formed on the center pillar 15. The stator 30 is sleeved on the periphery of the bearing system 20. The stator 3 includes an annular circuit board 31 and an armature winding electrically connected to the circuit board 31. The electric winding includes upper and lower insulating frames 32a, 32b, a plurality of pieces of steel 33 sandwiched between the upper and lower insulating frames 32a, 32b, and coils wound around the upper and lower insulating frames 32a, 32b 34. The center of the stator 30 defines a perforation 35 which is provided for the bearing system 2 to pass through. The outer diameter of the circuit board 31 is substantially the same as the size of the receiving portion 142 of the central portion of the fan frame 10. The center of the circuit board 31 is provided with a through hole 310. The edge of the through hole 310 is recessed inwardly to form a cylindrical notch 312. The size of the notch 312 corresponds to the size of the protrusion 151 on the outer wall surface of the center pillar 15. The rotor 40 includes a wheel valley 41, a plurality of blades 42 disposed on the hub 41, a ring magnet 48 received in the hub 41, an insulating cover 49 interposed between the ring magnet 48 and the inner wall surface of the hub 41, and a self-hub 41 The central axis extends downwardly from the shaft 45 (see Figure 10). As shown in FIG. 2 and FIG. 3, the bottom end of the bearing system 20 is embedded and fixed in the center pillar 15. The center of the bearing system 20 forms a shaft hole 22 for receiving a shaft, and the shaft of the rotor 40 45 is rotatably received in the shaft hole 22, a wear piece 26 is disposed at the bottom end of the shaft hole 22, and the inside of the bearing system 2 is at 9 200838396
轴孔22之一侧還形成一與軸心被平形之軸向穿孔24，該 穿孔2樓_2于_相魏。軸樣之底端之外表 面對應他5之凸緣152位置處向内形成一凹_，以將凸 緣152收谷於其内。轴承系統2()之頂端形成—台階π，該台 P皆27内設有-防油蓋28祕將潤滑油密封于軸孔η内。^ 防油蓋28呈階梯狀結構，巾央形成供轉軸Μ穿設之圓孔， 該防油蓋28包括-上端281及—下端282，其中上端281之内 徑大致等於轉軸45之外徑’下端282之内歓於轉軸45之内 徑。所述轉軸45、防油蓋28與軸承系統2〇之間於轴承系統 20之頂端共同形成-封閉之儲油空間29。轴承系統2〇之内 表面上設有用於引導潤滑流體之動壓槽21，該動壓槽21也 可设置於轉軸45之外表面。該動壓槽21可促使潤滑流體在 軸承系統20及轉軸45之間產生動態之塵力分佈，用於支禮 轉子40在軸承系統20中旋轉。 如圖4所示為軸承系統2〇内表面之動壓槽21沿圓周方 向之展開圖，該動壓槽21包括位於轴承系統2〇兩端且相互 平行設置之兩組流道結構，每一組流道結構呈上下對稱結 構。每一流道結構包括沿分界線210上下對稱之第一流道區 211及第二流道區212，第一流道區211之下緣和第二流道區 212之上緣相連’於分界線21〇處形成一集流區。每一流道 結構包括複數間隔排列、呈“V”形之第一動壓槽214及第 二動壓槽215。每一第一動壓槽214包括位於第一流道區211 之第一流道214a及位於第二流道區212之第二流道214b。每 一第二動壓槽215包括位於第一流道區211之第一流道215a 200838396 及位於第二流道區212之第二流道215b。 . 每一第一動壓槽214之第一、第二流道214a、214b與相 _ 鄰且位於後方之一第二動壓槽215之第一、第二流道215a、 215b共同相交於流道結構之分界線210處，形成一内交叉區 213，即形成所述集流區。每一第一動壓槽214之第一、第 二流道214a、214b分別與相鄰且位於前方之另一第二動壓 槽215之第一、第二流道215a、215b相交于第一流道區211 之上緣及第二流道區212之下緣，從而在流道結構之上、下 • 緣分別形成外交叉區218。 兩相鄰第一動壓槽214之兩第一流道214a及位於該兩 第一流道214a之間之第二動壓槽215之第一流道215a，或兩 相鄰第二動壓槽215之兩第一流道215a及位於該兩第一流 道215a之間之第一動壓槽214之第一流道214a在第一流道 區211形成“Z”形溝槽。同樣，相鄰兩第一動壓槽214之兩 第二流道214b及位於該兩第二流道214b之間之第二動壓槽 ^ 215之第二流道215b，或相鄰兩第二動壓槽215之兩第二流 道215b及位於該兩第二流道215b之間之第一動壓槽214之 第二流道214b，在該第二流道區212形成“Z”形溝槽。所 述第一流道214a、215a及第二流道214b、215b均呈弧線狀， 且形成之所述“Z”形溝槽交匯於流道結構之分界線210 處，從而任意相鄰流道之間相互連通。當轉轴45運轉時， 潤滑流體沿著流道從外交匯區218流向動壓槽21中部之内 交叉區213，在該内交叉區213產生較高之壓力，支撐轉軸 45運轉。同時，每一外交叉區218之潤滑流體能夠經過複數 11 200838396 條流道’比如第—流道214績第-流道215a，或者第二流 迢21仙與第二流道215b流向對應之内交叉區213，使外交叉 區218可形成較低之低壓，從而使具有魏壓槽此轴承系 統20具良好之防漏效果。 請參圖5至圖9，在散熱風扇成型製造過程中，先提供 -套完整且已經製作完成之轴承系統2〇，如圖5所示；該轴 承系統20内已姆先加工形成了軸孔22、穿孔及動麗槽 21 ’且已經設置了耐磨片26與防油蓋烈，並灌裝了爾油， 該軸承系統20底端之外表面上還設有—圓環狀之凹槽23。 為了防止爾油溢出並防止灰塵等雜物進人，該軸承系統 20之頂端于防油蓋28之頂面還設有—密封蓋29，以完全密 封該軸承系統2〇之轴孔22。 接著，將圖5所示之轴承系統2〇與扇框1〇一體成型，如 圖6所示，將軸承系統2〇置於一套成型該扇框1〇之模具犯 中成型該扇框1〇，即將軸承系統2〇之頂端定位在模具 中，而軸承系統20之底端與模具5〇之間則形成一注模空間 51，然後往該模具50中之注模空間51内注入形成該扇框ι〇 之熔融材料，如熔融之塑膠材料，該熔融材料填充於模具 中之注模空間51内，同時填充於該軸承系獅底端之凹槽 23内，該熔融材料冷卻凝固後，該軸承系統2〇則與扇框扣 一體製成，並通過凹槽23與扇框10緊密結合，從而該轴承 系統20與扇框10之中柱15形成一體緊密連接之整體結構。 在成型該扇框1〇之過程中，還包括在中柱b之外壁面上一 體开》成用於喪入至電路板31之缺口 m2内之至少一凸起 12 200838396 151。 • 在之後之組裝過程中，將定子30安裝至扇框ι〇之中柱 - b及軸承系統20之外圍上，如圖7所示；該電路板31套設於 該扇框10之中柱15並收容於該收容部142内，電路板31上之 缺口312與中柱15上之凸起151相卡合將兩者定位，防止二 者之間產生相對轉動，從而將定子3〇與扇框1〇固定；然後 取下設於軸承系統20頂端之密封蓋29，如圖8所示；接著再 _ 安裝轉子40，如圖9及圖10所示，將轉軸45從軸承系統20 之頂端向下穿設該防油蓋28而收容于轴孔22内，軸孔22内 之氣體在安裝過程中通過軸孔22旁邊之穿孔24排出，軸承 系統20内之潤滑油存儲於轉軸45與軸承系統2〇之間，即存 儲於轴承系統20内表面上之動壓槽21内。風扇運轉時，由 於離心力作用沿轉轴45上升之潤滑油在防油蓋28之阻擋 下，回流並存儲于儲油空間29内，並通過穿孔24回流至轴 孔22之底端。耐磨片26正對轉軸45之末端從而減缓轉子 _ 運轉時對軸承系統20之衝擊。 在上述組裝步驟中，也可以先將設於軸承系統2〇頂端 之密封蓋29取下，然後再組裝定子3〇至扇框1〇之中柱微 軸承系統20之賴’以及最後絲轉子概軸科統2〇中。 —本實麵散減射，轴承純猶輕1()為一體固 定連接，即依客戶需要預先提供一套製作完成之完整之拍 承系統20，然後於扇框1〇之成型過程中將轴承系統％與扇 框10形成-體固定連接，不僅避免了習知技術在先成型扇 框之後再組裝軸承之過程中需要用較大力氣將轴承插入並 13 200838396 固定於扇框之中柱内，避免產生組合公差及同心度等問 4，避免造成風扇工作過程中出現如噪音、軸承晃動等不 良現象，有效地提高結構可靠度及改善風扇性能；同時， 在成型完扇框之後，只需三個步驟即可完成整個風扇之組 裝，還進一步簡化了組裝之步驟，從而提高組裝效率並節 約了組裝成本。 綜上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 热悉本案技藝之人士，在爰依本發明精神所作之等效修飾 或變化，皆應涵蓋於以下之申請專利範圍内。 【圖式簡單說明】 圖1係本發明散熱風扇其中一實施例之分解圖。 圖2係圖1中扇框與軸承作為一體之剖示圖。 圖3係圖2中圈瓜之放大示意圖。 圖4係圖2中軸承系統内壁之動壓槽之圓周展開圖。 圖5係本發明散熱風扇之製造方法中一套完整之軸承 系統之立體圖。 圖6係本發明散熱風扇之製造方法中將圖5所示軸承系 統置於成型扇框之模具内之局部剖示圖。 圖7係本發明散熱風扇之製造方法中將定子組裝至扇 框之中柱上之立體圖。 圖8係圖7中去掉轴承系統之頂端之密封蓋之示意圖。 圖9係本發明散熱風扇之製造方法中最後組裝轉子之 立體圖。 14 200838396 圖10係圖9沿X-X線之剖示圖。One side of the shaft hole 22 also forms an axial through hole 24 which is flat with the axis, and the perforation 2 is _2. The outer surface of the shaft is formed with a recess _ inwardly at the position of the flange 152 corresponding to the bottom of the shaft 5 to receive the flange 152 therein. The top end of the bearing system 2 () forms a step π, and the stage P is provided with a - oil-proof cover 28 to seal the lubricating oil in the shaft hole η. The oil-proof cover 28 has a stepped structure, and the towel body forms a circular hole for the shaft to pass through. The oil-proof cover 28 includes an upper end 281 and a lower end 282, wherein the inner diameter of the upper end 281 is substantially equal to the outer diameter of the rotating shaft 45. The inner end of the lower end 282 is offset from the inner diameter of the rotating shaft 45. The shaft 45, the oil-proof cover 28 and the bearing system 2〇 together form a closed oil storage space 29 at the top end of the bearing system 20. The inner surface of the bearing system 2 is provided with a dynamic pressure groove 21 for guiding a lubricating fluid, and the dynamic pressure groove 21 may be provided on the outer surface of the rotating shaft 45. The dynamic pressure groove 21 causes the lubricating fluid to generate a dynamic dust force distribution between the bearing system 20 and the rotating shaft 45 for rotating the rotor 40 in the bearing system 20. 4 is a development view of the dynamic pressure groove 21 of the inner surface of the bearing system 2 in the circumferential direction, the dynamic pressure groove 21 includes two sets of flow path structures disposed at two ends of the bearing system 2 and parallel to each other, each of which The group flow channel structure has a vertically symmetrical structure. Each of the first-class track structures includes a first flow path area 211 and a second flow path area 212 that are vertically symmetrical along the boundary line 210. The lower edge of the first flow path area 211 and the upper edge of the second flow path area 212 are connected to the boundary line 21〇. A current collecting area is formed. Each of the main circuit structures includes a plurality of first dynamic pressure grooves 214 and a second dynamic pressure groove 215 which are arranged in a "V" shape. Each of the first dynamic pressure grooves 214 includes a first flow path 214a located in the first flow path area 211 and a second flow path 214b located in the second flow path area 212. Each of the second dynamic pressure grooves 215 includes a first flow path 215a 200838396 located in the first flow path area 211 and a second flow path 215b located in the second flow path area 212. The first and second flow passages 214a, 214b of each of the first dynamic pressure grooves 214 and the first and second flow passages 215a, 215b of the second dynamic pressure groove 215 which are adjacent to each other and located at the rear intersect with each other. At the boundary line 210 of the track structure, an inner intersection region 213 is formed, that is, the current collecting region is formed. The first and second flow passages 214a, 214b of each of the first dynamic pressure grooves 214 respectively intersect the first and second flow passages 215a, 215b of the adjacent and second forward dynamic pressure grooves 215 at the first flow. The upper edge of the land area 211 and the lower edge of the second flow path area 212 form an outer intersection area 218 above and below the flow path structure. Two first flow channels 214a of two adjacent first dynamic pressure grooves 214 and a first flow path 215a of the second dynamic pressure groove 215 between the two first flow channels 214a, or two adjacent two dynamic pressure grooves 215 The first flow path 215a and the first flow path 214a of the first dynamic pressure groove 214 located between the two first flow paths 215a form a "Z" shaped groove in the first flow path region 211. Similarly, the two second flow channels 214b of the adjacent two first dynamic pressure grooves 214 and the second flow path 215b of the second dynamic pressure groove 215 between the two second flow channels 214b, or adjacent two second The second flow passage 215b of the dynamic pressure groove 215 and the second flow passage 214b of the first dynamic pressure groove 214 between the two second flow passages 215b form a "Z" shaped groove in the second flow passage region 212. groove. The first flow passages 214a, 215a and the second flow passages 214b, 215b are all in an arc shape, and the "Z" shaped grooves formed intersect at the boundary line 210 of the flow passage structure, so that any adjacent flow passages Interconnected. When the rotary shaft 45 is operated, the lubricating fluid flows along the flow path from the diplomatic pool 218 to the inner cross section 213 of the dynamic pressure tank 21, where the high pressure is generated to support the operation of the rotary shaft 45. At the same time, the lubricating fluid of each outer intersection zone 218 can pass through a plurality of 11 200838396 flow passages 'such as the first flow passage 214 performance-flow passage 215a, or the second flow passage 21 Xian and the second flow passage 215b flow correspondingly. The intersection zone 213 allows the outer intersection zone 218 to form a lower low pressure, thereby providing the bearing system 20 with a good pressure relief effect. Referring to FIG. 5 to FIG. 9, in the manufacturing process of the cooling fan, a complete and completed bearing system 2〇 is provided first, as shown in FIG. 5; the bearing system 20 has been machined to form a shaft hole. 22, the perforation and the movable groove 21' and the wear-resistant piece 26 and the oil-proof cover are provided, and the oil is filled, and the outer surface of the bottom end of the bearing system 20 is further provided with an annular groove twenty three. In order to prevent the oil from overflowing and to prevent dust and the like from entering the body, the top end of the bearing system 20 is further provided with a sealing cover 29 on the top surface of the oil-proof cover 28 to completely seal the shaft hole 22 of the bearing system 2 . Next, the bearing system 2〇 shown in FIG. 5 is integrally formed with the fan frame 1〇, and as shown in FIG. 6, the bearing system 2〇 is placed in a set of molds that form the fan frame. 1〇, the top end of the bearing system 2〇 is positioned in the mold, and an injection molding space 51 is formed between the bottom end of the bearing system 20 and the mold 5〇, and then injected into the injection molding space 51 in the mold 50. The molten material of the fan frame, such as a molten plastic material, is filled in the injection molding space 51 in the mold, and is filled in the groove 23 at the bottom end of the bearing lion, and the molten material is cooled and solidified. The bearing system 2 is integrally formed with the frame buckle and is tightly coupled to the frame 10 through the recess 23, so that the bearing system 20 forms an integral structure integrally connected with the column 15 of the frame 10. In the process of molding the fan frame, the wall portion of the center pillar b is further formed into at least one protrusion 12 200838396 151 for being lost into the gap m2 of the circuit board 31. • In the subsequent assembly process, the stator 30 is mounted to the periphery of the frame-b and the bearing system 20 in the frame ι, as shown in FIG. 7; the circuit board 31 is sleeved in the middle of the frame 10 15 and received in the accommodating portion 142, the notch 312 on the circuit board 31 is engaged with the protrusion 151 on the center pillar 15 to position the two to prevent relative rotation between the two, thereby rotating the stator 3 and the fan The frame 1 is fixed; then the sealing cover 29 provided at the top end of the bearing system 20 is removed, as shown in Fig. 8; then the rotor 40 is mounted, as shown in Figs. 9 and 10, the rotating shaft 45 is taken from the top of the bearing system 20. The oil-proof cover 28 is inserted downwardly and received in the shaft hole 22, and the gas in the shaft hole 22 is discharged through the through hole 24 beside the shaft hole 22 during the installation process, and the lubricating oil in the bearing system 20 is stored in the rotating shaft 45 and the bearing. The system 2〇 is stored in the dynamic pressure groove 21 on the inner surface of the bearing system 20. When the fan is running, the lubricating oil rising along the rotating shaft 45 due to the centrifugal force is blocked by the oil-proof cover 28, recirculated and stored in the oil storage space 29, and returned to the bottom end of the shaft hole 22 through the through hole 24. The wear plate 26 faces the end of the rotating shaft 45 to slow the impact of the rotor system _ on the bearing system 20. In the above assembly step, the sealing cover 29 provided at the top end of the bearing system 2 也 can also be removed first, and then the stator 3 〇 is assembled to the frame micro-bearing system 20 and the final wire rotor. Axis Science and Technology 2 in the middle. - This solid surface is reduced and the bearing is purely light (1). It is a fixed connection. It is provided in advance with a complete set of the production system 20, and then the bearing is formed in the molding process of the fan frame. The system % forms a body-to-body fixed connection with the fan frame 10, which not only avoids the need for the prior art to insert the bearing after the frame frame is formed, and requires the use of a relatively large force to insert the bearing and fix the 13200838396 in the column of the fan frame. Avoid creating combination tolerances and concentricity 4, avoiding undesirable phenomena such as noise and bearing sloshing during fan operation, effectively improving structural reliability and improving fan performance. At the same time, after forming the fan frame, only three The entire fan assembly can be completed in a single step, which further simplifies the assembly steps, thereby improving assembly efficiency and saving assembly costs. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view of an embodiment of a cooling fan of the present invention. 2 is a cross-sectional view of the fan frame and the bearing in FIG. 1 as an integral part. Figure 3 is an enlarged schematic view of the circled melon in Figure 2. Figure 4 is a circumferential development view of the dynamic pressure groove of the inner wall of the bearing system of Figure 2. Figure 5 is a perspective view of a complete bearing system in the method of manufacturing the cooling fan of the present invention. Fig. 6 is a partial cross-sectional view showing the bearing system of Fig. 5 placed in a mold of a molded fan frame in the method of manufacturing the heat radiating fan of the present invention. Fig. 7 is a perspective view showing the assembly of the stator to the column in the fan frame in the method of manufacturing the heat radiating fan of the present invention. Figure 8 is a schematic illustration of the sealing cap of Figure 7 with the top end of the bearing system removed. Fig. 9 is a perspective view showing the final assembly of the rotor in the method of manufacturing the heat radiating fan of the present invention. 14 200838396 Figure 10 is a cross-sectional view taken along line X-X of Figure 9.
【主要元件符號說明】 扇框 10 外框 12 肋條 13 支撐部 14 收容部 142 中柱 15 凸起 151 凸緣 152 轴承系統 20 動壓槽 21 分界線 210 弟一流道區 211 第二流道區 212 内交叉區 213 第一動壓槽 214 第二動壓槽 215 第一流道 214a、215a 第二流道 214b、215b 外交叉區 218 軸孔 22 凹槽 23 穿孔 24 耐磨片 26 台階 27 防油蓋 28 上端 281 下端 282 儲油空間 29 定子 30 電路板 31 穿孔 310 缺口 312 上絕緣架 32a 下絕緣架 32b 梦鋼片 33 線圈 34 穿孔 35 轉子 40 輪轂 41 扇葉 42 轉軸 45 環形磁鐵 48 絕緣殼罩 49 模具 50 注模空間 51 15[Main component symbol description] Fan frame 10 Frame 12 Rib 13 Support portion 14 Housing portion 142 Middle column 15 Projection 151 Flange 152 Bearing system 20 Dynamic pressure groove 21 Demarcation line 210 First-class road area 211 Second flow path area 212 Inner cross section 213 First dynamic pressure groove 214 Second dynamic pressure groove 215 First flow path 214a, 215a Second flow path 214b, 215b External intersection area 218 Axle hole 22 Groove 23 Perforation 24 Wear plate 26 Step 27 Oil proof cover 28 Upper end 281 Lower end 282 Oil storage space 29 Stator 30 Circuit board 31 Perforation 310 Notch 312 Upper insulation frame 32a Lower insulation frame 32b Dream steel piece 33 Coil 34 Perforation 35 Rotor 40 Hub 41 Blade 42 Rotary shaft 45 Ring magnet 48 Insulation cover 49 Mold 50 injection molding space 51 15