201108924 六、發明說明： 【發明所屬之技術領域】 本發明涉及一種散熱風扇構造，特別是一種可易於加 工、製造、組裝之散熱風扇者。 【先前技術】 請參照第1圖所示，係中華民國公開第200744290號 「風扇及其内轉子馬達」發明專利案，該專利案揭示一種 習知散熱風扇80，該散熱風扇8〇大致包含一殼體81、一 定子結構82、-轉子結構83、一驅動|置84及一葉輪85 。該殼體81係由-第-殼體811及一第二_ 812所組成 :該第-殼體811與第二殼體812係由螺釘或娜釘等定位 几件813予賴定；該定子結構82具有—導磁元件; 該轉子結構83具有-轉軸831及一磁性元件啦， 831穿設至該殼體81内部，並由一第一轴承833盘一第二 =834支持該轉㈣1作定位旋轉，且該磁性元件832 =該轉軸如且對應該導磁元件821 ;該 電性連接該導磁元件821;該葉輪85係連結置= 位於該殼體料部。藉此，該驅動裝置8m 元件821之電流方向，以便與該磁'枝件 作用，進而驅動該轉子結構83及葉輪85旋 乂 該習知散熱風扇80欲針對各式動。 ，由於該散軸。未具有外框之設計產==熱: 85運轉時所產生之氣流無法被有效的導弓茶知 產品之一預定發熱部位，因此， 木至該電子 該習知散熱風扇80之散熱 201108924 效果不佳。 請參照第2圖所示，係揭示一種具有扇框之習知散熱 風扇90，該散熱風扇9〇包含一扇框91、一馬達％、一葉 輪93立及一電路板94。該扇框91係以塑膠材料射出成型一 m ^ 及馬達设912，該馬達殼912係位於該扇框 部911内側，該馬達殼912係由肋條等連接件913予以連 接支持於扇框。卩911，該馬達92係結合於該馬達殼912之 内部且包含一轉軸92卜一磁性元件922及一定子923，該 轉軸921由一轴承924樞接，且轉轴921 —端穿出至該馬 達级912外部，該磁性元件922係結合該轉軸921並對位 該定子923 ;該葉輪93係結合於該轉軸921之一端且位於 該馬達殼912之外部；該電路板94係電性連接該定子923 。藉此，可利用該馬達92驅動該葉輪％旋轉作動，以提 供一預定散熱作用。 該習知散熱風扇90主要係以射出成型方式形成該扇 框91以便利用該扇框91之設計導引集中該葉輪％運轉 枯所產生之氣流。由於該扇框91之馬達殼912係以塑膠材 料射出成型製成’因此’當該電路板94控制該定子 與u亥磁f·生元件922之間產生磁交鏈作用的過程中，該馬達 殼912本身並無法提供一封磁作用，故容易產生漏磁現 象，另一方面亦會造成電磁干擾的問題，使得該葉輪93 之運轉效能受到影響，進而降低該習知散熱風扇90之散熱 效果。再且，要將該磁性元件922、定子923與電路板94 等要組裝在該扇框部911與馬達殼912内側，亦顯得困難。 特別是，當該散熱風扇90之扇框91、馬達92及葉輪 201108924 為較大尺寸，或者該扇框91為金屬材質製造時，該構造顯 然無法適用製造。 【發明内容】 本發明係改良上述缺點，以提供一種散熱風扇構造， 該散熱風扇係有較佳之散熱效果為本發明之目的。 本發明之次一目的係提供一種散熱風扇構造，該散熱 風扇係可以容易的喊，使該散熱風扇易於加工生產並可 降低生產成本者。 本發明之再一目的係提供一種散熱風扇構造，該散熱 風扇之組裝係有較佳之精密度者。 本發明之又一目的係提供一種散熱風扇構造，該散熱 風扇係可以適用於大型尺寸或有金屬殼體之框體者。 本發明之又一目的係提供一種散熱風扇構造，該散熱 風扇係可以有效防止產生漏磁現象及杜.絕電磁干擾之問題 者。 為達到前述發明目的，本發明之散熱風扇構造包含有 一框體、一第一殼體、一第二殼體及一馬達，該框體具有 一進風口及一出風口，該進風口及出風口之間具有一氣流 通道，該氣流通道設有一固定座，該固定座與該框體之間 利用數個連接件相互連接，該固定座軸向設有數個第一定 位孔，該苐一殼體係由導磁材料製成，該第一殼體具有一 外結合壁及在一端形成一擴徑壁，該第一般體之另一端形 成一第一支持部，該第一殼體設有數第二定位孔’該數第 二定位孔與框體之數第一定位孔相對應，供定位元件將該 201108924 第-殼體與框體結合；該第二殼體崎於轉—殼體之擴 徑壁内部，該第二殼體設有-第二域部；該馬達設置於 該第-殼體内部且包含-轉子及—定子，該轉子具有一轉 軸及一磁性元件，該轉軸樞接於上述第一支持部與第二支 持部，且該轉軸結合一葉輪，該磁性元件對位該定子；及 一電路板，係電性連接該定子。 【實施方式】 為讓本發明之上述及其他目的、特徵及優點能更明顯 易懂’下文特舉本發明之較佳實施例，並配合所附圖式， 作詳細說明如下： 請參照第3及5圖所示’其係本發明第一實施例之散 熱風扇構造，該散熱風扇主要係包含一框體i、一第一殼 體2、一第二殼體3、一馬達4及一電路板5。該第一殼體 2係結合於該扇框1内侧，該第二殼體3結合於該第一殼 體2，該馬達4設置於該結合之第一殼體2與第二殼體3 内部；該電路板5係電性連接該馬達4。藉此，可利用該 電路板5控制該馬達4帶動一葉輪43旋轉作動，並藉由該 框體1導引集中該葉輪43運轉時所產生之氣流。 框體1係可以選用塑膠材料或者以金屬材料製成，該 框體1係具有一進風口 11及一出風口 12，該進風口 u及 出風口 12之間形成一氣流通道，在該氣流通道設有一固定 座13 ’該固定座13有一貫通之座孔17，該固定座13與該 框體1之間可利用數個連槔件14相互連接，各該連接件 14係可以選自肋條或靜葉等結構，該固定座13具有適當 201108924 之徑向厚度及軸向長度，且依該固定座13之軸向設有數個 第一定位孔15，該數第一定位孔15可以供定位元件16結 合，用以固定第一殼體2，在本實施例當中，該數第一定 位孔15可以為螺孔，該定位元件16可以為螺釘或螺桿。 第一殼體2係由導磁材料所製成之中空殼體，該第一 殼體2較佳係由金屬材料製成，且經由沖製或車削加工方 式，使該第一殼體2具有正圓形狀之内壁最佳。該第一殼 體2.具有一外結合壁21，該外結合壁21之外表面與固定 座13之座孔17成相對應之形狀，使該外結合壁21可以形 成緊配合之固定在該座孔17，在本實施例當中，該外結合 壁21與座孔17同為圓形；該第一殼體2之一端形成一擴 徑壁22,該第一殼體2之另一端形成一第一支持部23 ;該 擴徑壁22與外結合壁21之大小徑差形成一肩部24，該肩 部24設有數第二定位孔25，該數第二定位孔25與數第一 定位孔15相對應，使該定位元件16.可以將該第一殼體2 與框體1成牢固之結合。該第一殼體2之第一支持部23 可以支持一第一軸承26，該第一支持部23與外結合壁21 之大小徑差形成一肩部27，該肩部27可以設數散熱孔28 。該第一殼體2之擴徑壁22還可以設數定位部29，該定 位部29可以向第一殼體2之圓心方向凹入。 第二殼體3係由外周邊形成緊配合之組裝於該第一殼 體2之擴徑壁22内部，該第二殼體3設有一第二支持部 31，該第二支持部31可以支持一第二軸承32。該第二殼 體3設一結合部33，該結合部33可以供該電路板5及一 蓋板34抵靠。該蓋板34可呈杯狀，以使該電路板5有較 201108924 佳之散熱政果。該第二殼體3本身亦可以設數散熱孔35， 5亥數散熱孔35除可用作散熱外’還可以供電線通過。 馬達4係組裝於該第一殼體2内部，且該馬達$包含 轉子41及一定子42。該轉子41可轉動的容置於該定子 42内，且該轉子41具有一轉軸41卜一結合部412及一磁 件413。該轉軸411之第一端穿套在第一轴承％並結 "輪43以▼動該葉輪43同步旋轉，該結合可以如 圖所示，由該轉軸411與葉輪43設非正圓之結合部4丨2、 431相嵌合，且由一扣合件432予以固定，必要時， 二1可以套置一緩壓構件44，以避免該葉輪43直 -頁於第-轴承26。該轉軸411之第二端穿套在第二轴 :，^更該轉轴4U可分別被該第一轴 之外侧周面，以供對位該定子42 0 電路板5係設置於該第二殼體3之結合部3 34之間，如圖所示，兮雷 皿板 電路板5再被該蓋板 成% ’該電路板5與蓋板34之間還可以置入—絕:板7; 請閱第4圖所示，复传 組裝情形，首先將第—軸承、發明I、風扇第-實施例之 -支持部23,及將馬達—咖内之第 相對於外結合壁21位置，μ广子42固疋在弟—殼體2内 第-殼體2固定在該框體時，先利用定位元件Μ將該. 之固定座13 ’如此，再將該該 201108924 轉子41由轉軸411之第一端穿伸該第一軸承26後再結合 該葉輪43 ;該第二殼體3先由其第二支持部31置入第二 軸承32後，該第二殼體3被固定在該第一殼體2之擴徑壁 22内側’且該第二軸承32穿套在該轉軸411之第二端， 然後將該電路板5與蓋板34分別結合於該第二殼體3，利 用沖壓等各種方式，使該第一殼體2之定位部29向圓心方 向變形凹入’用以固定該蓋板34及電路板5，藉以構成本 發明之散熱風扇。 本發明第一實施例之散熱風扇，由於設有框體1，如 此’本發明第一實施例之散熱風扇除了可以有效導引葉輪 43旋轉所驅動之氣體流動外，當該框體1選用塑膠材料或 者以金屬材料製成時，本發明也可以適用於製造各種大型 尺寸散熱風扇需求，且該散熱風扇之加工、經裝也較為方 便。再且，當該第一殼體2由導磁材料製成時，該第—气 體2除了可以提供封磁仙，以有效避免產生漏磁現象及 電磁干擾的產生外。且由於該第一殼體2之製造加工方 ，該第一殼體2可以緊密且牢固地被固定在該固定座 更且在該第一殼體2之内壁被加工為同心圓狀態下，卷 第二殼體3由外周邊成緊配合之固定在該第—殼體2田孑 時，該第一殼體2與第二殼體3之組裝會有較佳 内部 。 <積密度 請閱第5圖所示，其係本發明第二實施例之散執 構造，該散熱風扇同樣包含一框體丨、一第一殼體6、、、風曷 二殼體7、一馬達4及一電路板5,，該馬達4與前述μ第 實施例所揭示之結構特徵相同，恕不再贅述。 处第〜 —11 — 201108924 在本實施例當中，該框體卜亦選 屬材料製成，該框體i係具有一進風口 = 二或者以金 ，碡進風口 π及出風口 12之間形成一 a、 出風口 1 iS 成氣流通道，在該氣 机通道設有—固定座13，該固定座13有一二，孔 ，該固定座13與該框體1之間可利用數個、^主孔 :=，可_肋：== ‘二徑向厚度及如長度，且依該固定座 ^軸心有數第-独孔15，該數第—枝孔15可以 ;疋位科16結合’用以固U —殼體2,在本實施例當 中’該固定座13係鄰近該出風口 12。 第-殼體6亦係'由導磁材料所製成之中空殼體，較佳 係，金屬材料製成，錄由沖製或車肖彳加卫方式，使該第 一喊體2具有正圓形狀之内壁最佳。該第 外結合壁61及在該外結合壁61—端邊形成—l壁 ，擴徑壁62之外表面與固定座13成相對應之形狀，在本 實施例當中’該二者為圓形’使該第—殼體6由該擴徑壁 62可以形成緊密之固定在該固定座13之座孔17 ;該第一 殼體6之底部設一握向延伸之唇部料，該唇部料徑向延 伸形成於該擴徑壁62之端部，該唇部64設有數第二定位 孔65，該數第二定位孔65與數第一定位子匕15相對應，使 該定位元件16可以將該第一殼體6與框體丨成牢固之結合 。該第-殼體6之另一端形成一第-支持部63，該第一支 持部63可以支持-第一軸承26，該第一支持部63與外結 合壁61之大小徑差形成一肩部67，該肩部67可以設數散 熱孔68。 —12 — 201108924 該第二殼體7係由外周邊形成緊配合之組裝於該第一 殼體6之擴徑壁62:内部，該第二殼體7設有一第二支持部 71，該第二支持部71可以支持一第二軸承72。該第二殻 體7設一結合部73’該結合部73可以供一電路板5，抵靠 ，且該第二殼體7設數結合件75 ’該結合件75可以結合 一蓋板74，在本實施例當中，該蓋板74為塑膠材質，該 , 結合件75直接卡扣在該蓋板74之結合孔741。該第二殼 體7本身亦可以設數散熱孔76。 • 電路板5係設置於該第二殼體7及蓋板74之間，且 該電路板5係電性連接該定子42，該電路板5，還可以由 周邊位置6又數疋位孔52，，該定位孔52’供第二殼體7 之結合件73通過。 請閱第j圖所示，本發明散熱風扇第二實施例之組裝 除了可以與第-實施例相同外，在本實施例當中，還可以 將第一轴承66固定在該第-殼體6内之第-支持部63， 及將馬達4之疋子42固定在第一殼體6内相對於外結合壁 # 61位置，再將該該轉子41由轉軸411之第-端由該第-軸承66穿出；該第二殼體7先由其第二支持部71置入第 二軸承72後，該第二殼體7被緊密地固定在該第一殼體6 之擴徑壁62>内側，且將該第二軸承72穿套在該轉軸 之第二端’復將該電路板5,與蓋板74分別結合於該第二 冗又體7 ’然後將該結合之馬達4、第二殼體7及電路板5, 由第一殼體6之擴後壁62成緊密地蚊在該框體i所設固 定座13之座孔17，並藉由定位元件16穿經第二定位孔65 釔口在固定座13之第一定位孔15，使該第一殼體6可以 —13 — 201108924 為牢固定地固定’再將該穿出於第一轴承66之轉軸411第 一端結合葉輪43，藉以構成本發明散熱風扇。 本發明第二實施例之散熱風扇構造，與第一實施例所 示異有相同之作用與效果外二實關之散熱風扇在 組裝上更為方便。 本發明的散熱風扇構造，由於設有框體，使得該葉輪 所驅動的氣流可以朝-預定的方向流動，使得本發明的^ 熱風扇會有較佳之散熱效果的功玫。 本發明的散熱風扇構造，由於該第一殼體與框體可以 分開加1製造，使得本發明的散熱風扇係可以容易的組裝 及易於加工生產並可降低生產成本效果的功效。 、 本發明的散熱風扇構造，由於該第一殼體與第二殼體 可以以車削加工製造方式，使得該第一殼體與第二殼體之 組裝，係可以有較佳精密度效果的功效。 本發明的散熱風扇構造，由於該第一殼體與框體可以 分開加工製造，使得本發明係可以適用於製造各種大型尺 寸的散熱風扇，或可以以金屬製造該框體效果的功效。 本發明的散熱風扇構造，由於該第一殼體可以由導磁 材料製成，使付本發明的散熱風扇係可以有效防止產生漏 磁現象及具有杜絕電磁干擾問題效果的功效。 雖然本發明已利用上述較佳實施例揭示，然其並非用 以限定本發明，任何熟習.此技藝者在不脫離本發明之精神 和範圍之内，相對上述實施例進行各種更動與修改仍屬本 發明所保護之技術範疇’因此本發明之保護範圍當視後附 之申請專利範圍所界定者為準。 —14 — 201108924 【圖式簡單說明】 第1圖：習知之散熱風扇組合剖視圖。 第2圖：習知具有扇框之散熱風扇的組合剖視圖。 第3圖：本發明第一實施例之散熱風扇的立體分解圖。 第4圖：本發明第一實施例之散熱風扇的組合剖視圖。 第5圖：本發明第二實施例之散熱風扇的立體分解圖。 第6圖：本發明第二實施例之散熱風扇的組合剖視圖。 【主要元件符號說明】 〔本發明〕 1 框體 11 進風口 12 出風口 13 固定座 14 連接件 15 第一定位孔 16 定位元件 17 座孔 2 第一殼體 21 外結合壁 22 擴徑壁 23 第一支持部 24 肩部 25 第二定位孔 26 第一車由承 27 肩部 28 散熱孔 29 定位部 3 第二殼體 31 第二支持部 32 第二軸承 33 結合部 34 蓋板 35 散熱孔 15 — 201108924 4 馬達 41 轉子 411 轉軸 412 結合部 413 磁性元件 42 定子 43 葉輪 431 結合部 432 扣合件 44 缓壓構件 5 電路板 51 絕緣板 5， 電路板 52, 定位孔 6 第一殼體 61 外結合壁 62 擴徑壁 63 第二支持部 64 唇部 65 第二定位孔 66 第一軸承 67 肩部 68 散熱孔 7 第二殼體 71 第二支持部 72 第二軸承 73 結合部 74 蓋板 741 結合孔 75 結合件 76 散熱孔 〔習知〕 80 散熱風扇 81 殼體 811 第一殼體 812 第二殼體 813 定位元件 82 定子結構 821 導磁元件 83 轉子結構 831 轉軸 832 磁性元件 833 第一軸承 834 第二軸承 84 驅動裝置 —16 — 201108924 85 葉輪 90 散熱風扇 91 扇框 911 扇框部 912 馬達殼 913 連接件 92 馬達 921 轉軸 922磁性元件 923 定子 924 軸承― 93 葉輪 94 電路板201108924 VI. Description of the Invention: [Technical Field] The present invention relates to a heat dissipation fan structure, and more particularly to a heat dissipation fan that can be easily processed, manufactured, and assembled. [Prior Art] Please refer to FIG. 1 for the invention patent of "Fan and its inner rotor motor" of the Republic of China Publication No. 200744290, which discloses a conventional heat dissipation fan 80, which generally comprises a The housing 81, the stator structure 82, the rotor structure 83, a drive | a 84 and an impeller 85. The housing 81 is composed of a first housing 811 and a second housing 812: the first housing 811 and the second housing 812 are positioned by screws or nails, etc.; The structure 82 has a magnetic conductive element; the rotor structure 83 has a rotating shaft 831 and a magnetic element, and the 831 is inserted into the interior of the housing 81, and is supported by a first bearing 833, a second = 834, and the rotating (four) 1 Positioning rotation, and the magnetic element 832 = the rotating shaft as and corresponding to the magnetic conductive element 821; the electrical connection of the magnetic conductive element 821; the impeller 85 is coupled = located in the housing material. Thereby, the current direction of the driving device 8m element 821 acts to interact with the magnetic 'branch member, thereby driving the rotor structure 83 and the impeller 85 to rotate. The conventional heat dissipating fan 80 is intended to be movable for each type. Due to the scattered axis. The design without the outer frame ==heat: The airflow generated during the operation of 85 can not be determined by one of the effective guide tea products. Therefore, the heat to the electronic cooling fan 80 is not effective. good. Referring to Fig. 2, a conventional heat dissipation fan 90 having a fan frame is disclosed. The heat dissipation fan 9 includes a frame 91, a motor%, a leaf wheel 93, and a circuit board 94. The fan frame 91 is formed by molding a plastic material and a motor 912. The motor casing 912 is located inside the frame portion 911. The motor casing 912 is connected to the fan frame by a connecting member 913 such as a rib.卩911, the motor 92 is coupled to the inside of the motor casing 912 and includes a rotating shaft 92, a magnetic element 922 and a stator 923. The rotating shaft 921 is pivotally connected by a bearing 924, and the rotating shaft 921 is end-to-end. Outside the motor stage 912, the magnetic element 922 is coupled to the rotating shaft 921 and coupled to the stator 923; the impeller 93 is coupled to one end of the rotating shaft 921 and located outside the motor casing 912; the circuit board 94 is electrically connected to the motor Stator 923. Thereby, the motor 92 can be used to drive the impeller to rotate to provide a predetermined heat dissipation. The conventional heat dissipating fan 90 is mainly formed by injection molding to form the fan frame 91 so as to guide the flow of the impeller generated by the operation of the fan frame 91. Since the motor casing 912 of the frame 91 is injection molded from a plastic material, the motor is in the process of controlling the magnetic interlinking between the stator and the 922. The shell 912 itself does not provide a magnetic effect, so that magnetic leakage is likely to occur, and on the other hand, electromagnetic interference is caused, so that the operating efficiency of the impeller 93 is affected, thereby reducing the heat dissipation effect of the conventional cooling fan 90. . Further, it is also difficult to assemble the magnetic member 922, the stator 923, the circuit board 94, and the like inside the fan frame portion 911 and the motor case 912. In particular, when the fan frame 91, the motor 92, and the impeller 201108924 of the heat radiating fan 90 are of a large size, or the frame 91 is made of a metal material, the structure is obviously not applicable. SUMMARY OF THE INVENTION The present invention is to improve the above disadvantages to provide a heat dissipation fan structure having a preferred heat dissipation effect for the purpose of the present invention. A second object of the present invention is to provide a heat dissipating fan structure which can be easily shouted, which makes the heat dissipating fan easy to process and can reduce the production cost. Still another object of the present invention is to provide a heat dissipating fan structure which is assembled with better precision. Still another object of the present invention is to provide a heat dissipating fan structure which can be applied to a frame of a large size or a metal casing. Still another object of the present invention is to provide a heat dissipating fan structure which can effectively prevent the occurrence of magnetic flux leakage and the problem of electromagnetic interference. In order to achieve the foregoing object, the heat dissipation fan structure of the present invention comprises a frame body, a first casing, a second casing and a motor, the frame body having an air inlet and an air outlet, the air inlet and the air outlet There is an air flow channel, the air flow channel is provided with a fixing seat, and the frame is connected to the frame by a plurality of connecting members. The fixing seat is axially provided with a plurality of first positioning holes, and the first housing hole is provided. The first housing has an outer connecting wall and an expanded diameter wall at one end, and the other end of the first body forms a first supporting portion, and the first housing is provided with a second positioning The second positioning hole of the hole corresponds to the first positioning hole of the frame body, and the positioning component combines the 201108924 first-shell with the frame; the second casing is in the expansion wall of the rotating-shell Internally, the second housing is provided with a second domain portion; the motor is disposed inside the first housing and includes a rotor and a stator, the rotor has a rotating shaft and a magnetic component, and the rotating shaft is pivotally connected to the foregoing a support portion and a second support portion, and the shaft hinge An impeller, the alignment of the stator magnetic element; and a circuit board electrically connected to the stator based. The above and other objects, features, and advantages of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; And FIG. 5 is a heat dissipation fan structure according to a first embodiment of the present invention. The heat dissipation fan mainly includes a frame i, a first housing 2, a second housing 3, a motor 4, and a circuit. Board 5. The first housing 2 is coupled to the inside of the fan frame 1. The second housing 3 is coupled to the first housing 2. The motor 4 is disposed inside the combined first housing 2 and second housing 3. The circuit board 5 is electrically connected to the motor 4. Thereby, the circuit board 5 can be used to control the motor 4 to drive an impeller 43 to rotate, and the frame body 1 guides the airflow generated when the impeller 43 is operated. The frame 1 can be made of a plastic material or a metal material. The frame 1 has an air inlet 11 and an air outlet 12, and an air flow passage is formed between the air inlet u and the air outlet 12, and the air passage is formed in the air passage. A fixing seat 13 is provided. The fixing seat 13 has a through hole 17 . The fixing seat 13 and the frame 1 can be connected to each other by a plurality of connecting pieces 14 , and the connecting piece 14 can be selected from a rib or The stator or the like has a radial thickness and an axial length of the appropriate 201108924, and a plurality of first positioning holes 15 are provided according to the axial direction of the fixing seat 13, and the number of the first positioning holes 15 can be used for positioning components. 16 is combined to fix the first housing 2. In the embodiment, the first positioning holes 15 may be screw holes, and the positioning component 16 may be a screw or a screw. The first housing 2 is a hollow housing made of a magnetically permeable material, and the first housing 2 is preferably made of a metal material, and the first housing 2 is made by punching or turning. The inner wall with a perfect circular shape is the best. The first housing 2 has an outer joint wall 21, and the outer surface of the outer joint wall 21 has a shape corresponding to the seat hole 17 of the fixing seat 13, so that the outer joint wall 21 can be formed into a tight fit. In the present embodiment, the outer connecting wall 21 and the seat hole 17 are circular; one end of the first housing 2 forms an enlarged diameter wall 22, and the other end of the first housing 2 forms a The first support portion 23; the difference in diameter between the enlarged diameter wall 22 and the outer joint wall 21 forms a shoulder portion 24, and the shoulder portion 24 is provided with a plurality of second positioning holes 25, the number of second positioning holes 25 and the number of first positioning The holes 15 correspond to the positioning member 16. The first housing 2 can be firmly coupled to the frame 1. The first support portion 23 of the first housing 2 can support a first bearing 26, and the diameter difference between the first support portion 23 and the outer joint wall 21 forms a shoulder portion 27, and the shoulder portion 27 can be provided with a plurality of heat dissipation holes. 28 . The enlarged diameter wall 22 of the first casing 2 may be provided with a plurality of positioning portions 29 which may be recessed in the direction of the center of the first casing 2. The second housing 3 is formed by the outer periphery of the enlarged diameter wall 22 of the first housing 2, and the second housing 3 is provided with a second support portion 31. The second support portion 31 can support the second support portion 31. A second bearing 32. The second housing 3 is provided with a joint portion 33, and the joint portion 33 can abut the circuit board 5 and a cover plate 34. The cover plate 34 can be cup-shaped, so that the circuit board 5 has a better heat dissipation effect than 201108924. The second housing 3 itself may also be provided with a plurality of heat dissipation holes 35. In addition to being used for heat dissipation, the heat dissipation holes 35 may also pass through the power supply line. The motor 4 is assembled inside the first casing 2, and the motor $ includes a rotor 41 and a stator 42. The rotor 41 is rotatably received in the stator 42. The rotor 41 has a rotating shaft 41 and a coupling portion 412 and a magnetic member 413. The first end of the rotating shaft 411 is sleeved on the first bearing %, and the wheel 43 is synchronously rotated by the wheel 43. The combination can be combined with the impeller 43 by a non-circular circle as shown in the figure. The portions 4, 2, 431 are fitted and fixed by a fastening member 432. If necessary, the two members 1 can be placed with a pressure-reducing member 44 to prevent the impeller 43 from being straight-to-the-bearing 26. The second end of the rotating shaft 411 is sleeved on the second shaft: and the rotating shaft 4U can be respectively disposed on the outer peripheral surface of the first shaft for aligning the stator 42 0 the circuit board 5 is disposed on the second shaft Between the joints 3 34 of the casing 3, as shown, the slab plate circuit board 5 is further replaced by the cover plate. The circuit board 5 and the cover plate 34 can also be placed together - the board 7 Referring to FIG. 4, in the case of the retransmission assembly, first, the first bearing, the invention I, the fan-the embodiment-support portion 23, and the first portion of the motor-coffee are positioned relative to the outer joint wall 21, When the first housing 2 is fixed to the housing in the housing 2, the fixing member 13' of the positioning member is first used, and the 201108924 rotor 41 is rotated by the rotating shaft 411. The first end of the first bearing 26 is coupled to the impeller 43; the second housing 3 is first placed by the second support portion 31 into the second bearing 32, and the second housing 3 is fixed thereto. The second bearing 32 of the first housing 2 is inserted into the second end of the rotating shaft 411, and then the circuit board 5 and the cover 34 are respectively coupled to the second housing 3, Stamping, etc. Way, the positioning of the first portion 29 of the housing 2 is recessed to deform to the center side 'for fixing the cover plate 34 and the circuit board 5, thereby constituting the cooling fan according to the present invention. The heat dissipating fan of the first embodiment of the present invention is provided with a frame body 1, so that the heat dissipating fan of the first embodiment of the present invention can effectively guide the gas flow driven by the rotation of the impeller 43 when the frame body 1 is plastic. When the material is made of a metal material, the invention can also be applied to the manufacture of various large-size cooling fans, and the processing and installation of the cooling fan are also convenient. Further, when the first casing 2 is made of a magnetically permeable material, the first gas body 2 can provide a magnetic sealing element to effectively avoid the occurrence of magnetic flux leakage and electromagnetic interference. And because of the manufacturing process of the first casing 2, the first casing 2 can be tightly and firmly fixed to the fixing seat, and in the state in which the inner wall of the first casing 2 is processed into a concentric circle, the coil When the second casing 3 is fixedly fitted to the first casing 2 by the outer periphery, the assembly of the first casing 2 and the second casing 3 has a better interior. <Product density, as shown in Fig. 5, which is a loose structure of the second embodiment of the present invention, the heat dissipation fan also includes a frame body, a first casing 6, and a wind casing 2 A motor 4 and a circuit board 5, the motor 4 is the same as that disclosed in the foregoing first embodiment, and will not be described again. In the present embodiment, the frame body is also made of a material, and the frame body i has an air inlet = two or gold, and the air inlet π and the air outlet 12 form an a. The air outlet 1 iS is a gas flow passage, and the air passage is provided with a fixing seat 13 , the fixing seat 13 has two holes, and the fixing seat 13 and the frame 1 can be used with several main holes. :=, can be _ rib: == 'two radial thickness and the length, and according to the fixed seat ^ axis has a number of single-single hole 15, the number of the first branch hole 15; Solid U - housing 2, in the present embodiment 'the fixed seat 13 is adjacent to the air outlet 12. The first housing 6 is also a hollow housing made of a magnetically permeable material, preferably made of a metal material, which is recorded by a punching or car xiao wei, so that the first shouting body 2 has The inner wall of the perfect circular shape is the best. The first outer joint wall 61 and the end edge of the outer joint wall 61 form a wall, and the outer surface of the diameter-expanding wall 62 has a shape corresponding to the fixed seat 13. In the present embodiment, the two are circular. 'The first housing 6 can be formed by the enlarged diameter wall 62 to be tightly fixed to the seat hole 17 of the fixing seat 13; the bottom of the first housing 6 is provided with a grip extending lip material, the lip The radial extension is formed at an end of the enlarged diameter wall 62. The lip portion 64 is provided with a plurality of second positioning holes 65 corresponding to the plurality of first positioning holes 15 such that the positioning member 16 The first housing 6 can be firmly joined to the frame. The other end of the first housing 6 is formed with a first support portion 63. The first support portion 63 can support the first bearing 26, and the first support portion 63 and the outer joint wall 61 have a diameter difference to form a shoulder portion. 67. The shoulder portion 67 can be provided with a plurality of heat dissipation holes 68. -12 - 201108924 The second housing 7 is formed by the outer periphery of the enlarged diameter wall 62 of the first housing 6 which is tightly fitted, and the second housing 7 is provided with a second support portion 71. The second support portion 71 can support a second bearing 72. The second housing 7 is provided with a joint portion 73'. The joint portion 73 can be used for a circuit board 5, and the second housing 7 is provided with a plurality of joint members 75. The joint member 75 can be coupled with a cover plate 74. In the embodiment, the cover 74 is made of a plastic material, and the coupling member 75 is directly fastened to the coupling hole 741 of the cover 74. The second casing 7 itself may also be provided with a plurality of heat dissipation holes 76. The circuit board 5 is disposed between the second housing 7 and the cover 74, and the circuit board 5 is electrically connected to the stator 42. The circuit board 5 can also be clamped by the peripheral position 6 and the clamping hole 52. The positioning hole 52' is passed through the coupling member 73 of the second housing 7. Referring to FIG. j, the assembly of the second embodiment of the heat dissipation fan of the present invention may be identical to the first embodiment. In the present embodiment, the first bearing 66 may be fixed in the first housing 6. The first support portion 63 and the dice 42 of the motor 4 are fixed in the first housing 6 at a position relative to the outer joint wall #61, and the rotor 41 is further rotated from the first end of the rotary shaft 411 by the first bearing 66 is inserted out; the second housing 7 is first placed by the second support portion 71 into the second bearing 72, and the second housing 7 is tightly fixed to the enlarged diameter wall 62 of the first housing 6 And the second bearing 72 is sleeved on the second end of the rotating shaft to re-attach the circuit board 5, and the cover plate 74 respectively to the second redundant body 7' and then the combined motor 4, second The housing 7 and the circuit board 5 are formed by the rear wall 62 of the first housing 6 so as to be closely attached to the seat hole 17 of the fixing base 13 of the frame i, and pass through the second positioning hole by the positioning member 16. 65 钇 在 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一 第一The impeller 43 is combined to form the cooling fan of the present invention. The heat dissipating fan structure of the second embodiment of the present invention is more convenient in assembly than the heat dissipating fan which has the same function and effect as the first embodiment. In the heat dissipating fan structure of the present invention, since the frame body is provided, the airflow driven by the impeller can flow in a predetermined direction, so that the heat-dissipating fan of the present invention has a better heat-dissipating effect. According to the heat dissipating fan structure of the present invention, since the first casing and the frame body can be separately manufactured, the heat dissipating fan of the present invention can be easily assembled and easily processed and produced, and the effect of the production cost effect can be reduced. According to the heat dissipation fan structure of the present invention, since the first housing and the second housing can be manufactured by turning, the assembly of the first housing and the second housing can have better precision effects. . According to the heat dissipating fan structure of the present invention, since the first casing and the frame body can be separately manufactured, the present invention can be applied to manufacture various large-sized heat dissipating fans, or the effect of the frame body can be made of metal. According to the heat dissipating fan structure of the present invention, since the first casing can be made of a magnetic conductive material, the heat dissipating fan of the present invention can effectively prevent the occurrence of magnetic leakage and the effect of eliminating electromagnetic interference problems. While the present invention has been disclosed in its preferred embodiments, it is not intended to limit the scope of the present invention. The technical scope of the invention is therefore to be determined as the scope of the invention is defined by the scope of the appended claims. —14 — 201108924 [Simple description of the diagram] Figure 1: A cross-sectional view of a conventional cooling fan assembly. Fig. 2 is a sectional view showing a combination of a conventional fan having a fan frame. Fig. 3 is an exploded perspective view showing the heat radiating fan of the first embodiment of the present invention. Fig. 4 is a sectional view showing the combination of the heat radiating fan of the first embodiment of the present invention. Fig. 5 is an exploded perspective view showing the heat radiating fan of the second embodiment of the present invention. Fig. 6 is a sectional view showing the combination of the heat radiating fan of the second embodiment of the present invention. [Description of main components] [Invention] 1 Frame 11 Air inlet 12 Air outlet 13 Fixing seat 14 Connecting piece 15 First positioning hole 16 Positioning element 17 Seat hole 2 First housing 21 External joint wall 22 Expanding wall 23 First support portion 24 shoulder portion 25 second positioning hole 26 first vehicle bearing 27 shoulder portion 28 heat dissipation hole 29 positioning portion 3 second housing 31 second support portion 32 second bearing 33 joint portion 34 cover plate 35 heat dissipation hole 15 — 201108924 4 Motor 41 Rotor 411 Rotary shaft 412 Joint 413 Magnetic element 42 Stator 43 Impeller 431 Joint 432 Fastener 44 Slow-pressing member 5 Circuit board 51 Insulation board 5, Circuit board 52, Positioning hole 6 First housing 61 Outer joint wall 62 enlarged diameter wall 63 second support portion 64 lip portion 65 second positioning hole 66 first bearing 67 shoulder portion 68 heat dissipation hole 7 second housing 71 second support portion 72 second bearing 73 joint portion 74 cover 741 coupling hole 75 coupling member 76 heat dissipation hole [conventional] 80 heat dissipation fan 81 housing 811 first housing 812 second housing 813 positioning member 82 stator structure 821 magnetic conductive member 83 Substructure 831 Rotary shaft 832 Magnetic element 833 First bearing 834 Second bearing 84 Drive unit-16 - 201108924 85 Impeller 90 Cooling fan 91 Sector frame 911 Fan frame part 912 Motor housing 913 Connection piece 92 Motor 921 Rotary shaft 922 Magnetic element 923 Stator 924 Bearing - 93 impeller 94 circuit board