200844335 t . 九、發明說明： / ^ 【發明所屬之技術領域】 本發明涉及一種散熱風扇，尤指一種具有高潤滑特性 之散熱風扇及其定子絕緣片結構。 【先前技術】 隨著中央處理器等發熱電子元件之運行速度越 來越快，其產生之熱量亦愈來愈多。為確保電子元件 之正常運作，必須對其進行快速有效之散熱。通常， ® 業界在中央處理器等發熱電子元件上安裝散熱器辅 助其散熱，同時，在散熱器上安裝風扇，以提供強制 氣流促使散熱器之熱量快速散發，從而對中央處理器 等發熱電子元件進行更為有效之散熱。目前，散熱風 扇在電子元件散熱領域發揮著重要作用。風扇之良好 散熱效果使發熱元件具有較長之使用壽命，而風扇内 之轴承是否具有良好之潤滑性能又對風扇之使用壽 φ 命產生重要影響。 風扇内之軸承一般採用潤滑油潤滑，習知風扇軸 承之保油效果一般不甚理想，隨著轴承内潤滑油之損 耗，風扇轉軸與轴承壁之摩擦會相應增加，從而降低 軸承之壽命，進而減少風扇本身之使用壽命。因此， 軸承之潤滑問題一直是散熱風扇領域關注之重點。 習知散熱風扇如圖7所示，其包括一轉子1，一具 有中柱5之扇框4，中柱5中心形成一通孔7，一軸承3 收容於該通孔7内。軸承3内形成一軸向之通孔，轉軸 6 200844335 1 2從轉子中央向下延伸，並收容於軸承3之通孔内，轉 轴2與轴承3之間填充潤滑油以旋轉地支持轉子1。一 m 油圈6環設於轉軸2並位於軸承3頂端，一狹槽（未標 示）形成於油圈6與中柱5之間。該散熱風扇工作時， 潤滑油沿轉轴2爬升後會通過狹槽甩出流失（如圖中 虛線所示）。軸承3之潤滑性能也隨著潤滑油之流失而 逐漸降低，轉軸2和軸承3之間之摩擦增大。因潤滑不 足導致噪音變大，且轉軸2易磨損，而縮短風扇之使 ® 用壽命。 另外，加設油圈6之方式導致在原散熱風扇之基 礎上需增加額外之元件，將增加材料以及製程成本， 同時亦需增加組裝工序，在市場上缺乏成本競爭力。 【發明内容】 有鑒於此，在此實有必要提供一種防止潤滑油外泄 而具有更長之使用壽命，且幾乎不增加額外成本之散 φ 熱風扇。 同時，亦有必要提供一種達成上述功效之定子絕 緣片結構。 一種散熱風扇，包括一扇框、一轉子構件及一定 子構件，該扇框之底部中央突設形成一軸座，一内部 設有軸向通孔之軸承收容於軸座内，該轉子構件具有 收容於該軸承内部之通孔内之一轉軸，該定子構件套 設於該軸座外緣，包括上、下絕緣片及夾設於上、下 絕緣片之間之多層石夕鋼片’該上絕緣片向轉轴所在中 7 200844335 ‘ 心位置之内侧一體延伸形成一擔油結構，該擋油結構 延伸至接近於轉軸之外表面。 / 一種定子絕緣片結構，該絕緣片包括—圓柱狀之 土。卩a亥壁部於底緣之圓周徑向向外均勻間隔延伸形 成多個延伸臂，該壁部於頂緣之圓周徑向向内一體延 伸形成一擋油結構。 與習知技術相比，該散熱風扇中擋油結構與定子構 卩之絕緣片為一體成形’―方面可以防止潤滑油外 泄，另外一方面達到減免額外元件，從而節約材料以 及製程成本，簡化組裝工序。 【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。 /明 > 閱圖1，5亥散熱風扇包括一扇框如、一轴承 系統60、一定子構件20及—轉子構件1〇，該轉子構件 10對應於該定子構件2Q之週邊，轉子構件1()和定子構 φ 件2〇分別收容於扇框30内。 扇框30包括一底部32和一軸座34，該軸座M從扇 框底部32中央向上突設形成。軸座34頂端為一開口頂 端，中央形成一收容空間36。該軸座34頂端之内圓周 處形成一環形凹陷38，該環形凹陷38與收容空間从相 連通。 定子構件20包括一電路板26、固定於電路板26上 之由複數層矽鋼片疊設形成之一電樞22及分別罩設 於電樞22上下兩端之上、下絕緣片、2肋。電樞22 8 200844335 外部纏繞繞線24用以產生交替變化之磁場，並舉過繞 線24與電路板26電性連接，絕緣片28a、2肋可避免電 樞22與繞線24電性接觸。 轉子構件ίο包括一輪轂12及一轉轴18，該輪轂12 外緣放射狀突設複數扇葉14，輪轂12内侧緣貼設一磁 鐵環16。該輪轂12中央形成一轉軸軸座12〇。該轉軸 18之頂端固定於該轉軸軸座12〇上，並向下延伸。 該軸承系統60包括一軸承61、一扣環63及一由高 耐磨材料做成之襯墊67，通過軸座34之開口頂端收容 於其收谷空間36内。扣環63中央形成一中心通孔630。 請參考圖2及圖3,為上絕緣片28a之立體放大圖及 剖面圖，該上絕緣片28a包括一圓柱狀之壁部281，該 壁4 281底緣之圓周控向向外均勻間隔延伸形成四個 延伸臂282 ’以供繞線24纏繞；同時，該壁部281頂緣 之圓周徑向向内一體延伸形成一擋油結構283，該擋 油結構283之中央形成一穿孔284。該擋油結構283包 括由壁部281之頂緣向内水平延伸一段距離形成之一 水平連接部283a、從該水平連接部283a之末端垂直向 下延伸一定高度形成之一豎直連接部283b及從該豎 直連接部283b之底端再向内水平延伸形成之一擋油 環283c。該豎直連接部283b之高度與軸座34頂端形成 %形凹陷38處之南度相等。該穿孔284設在擔油環283c 之中心處，以供轉軸18穿設延伸，該穿孔284之内徑 稍大於轉軸18之外徑。在此實施例中，轉軸18與擋油 9 200844335 環283c之間形成一大約〇5mm之間 隙。该風扇工作 日守，此間隙就可以避免擋油環283(和轉軸以之間直接 接觸而產生摩擦。 清芩照圖4與圖5，為散熱風扇之立體組裝圖及剖 視圖，軸承系統60收容於轴座34之收容空間36内，襯 墊67位於軸座34收容空間36之底部，軸座34之底端還 向内突出形成一台階31。該轉轴18之外表面於靠近其 頂端之位置處向内凹陷形成一環形之凹槽18〇，同 時’該轉軸18之外表面於靠近其底端之自由端186之 位置處向内凹陷形成另一環形之凹陷184。該扣環63 之中心通孔630之直徑大小可供轉轴18之自由端186 擠壓穿設通過，使扣環63套設於轉轴18之凹陷184 處’並位於軸承61之底端65與軸座34之台階31之間， 扣環63與凹陷184共同作用限制轉轴18之軸向運動。 轉軸18穿設定子構件2〇之上絕緣片28a頂端之擋油結 構283 ’襯墊67與轉軸18之自由端186相抵觸，旋轉地 支持轉軸18，從而組裝轉子構件10。定子構件2〇套 設、固裝於轴座34外緣，且上絕緣片28a之擋油結構283 之水平連接部283a與軸座34之頂端相抵觸，豎直連接 部283b緊貼於開口頂端處之内壁，而擋油環283c可恰 好承載於軸座34開口頂端處之環形凹陷38内，且擋油 環283c之内圓周接近於轉軸18之外表面。 請一併參閱圖6，軸承61内部形成一軸向通孔 62，以供轉軸18穿設延伸。轴承61内中間部分之内徑 200844335 ==底端65部分之内後，即軸向通孔62中間 ^絲Γ 端部分之直徑，因而在軸承61中間 =_伽之間形成—㈣7G。該空間糊填充潤 :’丨面可以增加潤滑油之總 =。使得轴承⑽兩末端—200844335 t. VENTION DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a heat dissipation fan, and more particularly to a heat dissipation fan having high lubrication characteristics and a stator insulation sheet structure thereof. [Prior Art] As heat-emitting electronic components such as a central processing unit operate faster and faster, more heat is generated. To ensure proper operation of electronic components, they must be dissipated quickly and efficiently. In general, the industry installs a heat sink on a heat-generating electronic component such as a central processing unit to assist in heat dissipation. At the same time, a fan is mounted on the heat sink to provide a forced air flow to cause the heat of the heat sink to be quickly dissipated, thereby heating the electronic components such as the central processing unit. For more efficient heat dissipation. At present, the heat dissipation fan plays an important role in the field of heat dissipation of electronic components. The good heat dissipation effect of the fan makes the heating element have a long service life, and whether the bearing in the fan has good lubricating performance has an important influence on the life of the fan. The bearings in the fan are generally lubricated with lubricating oil. The oil retaining effect of the conventional fan bearing is generally not ideal. As the lubricating oil in the bearing is worn, the friction between the fan shaft and the bearing wall will increase accordingly, thereby reducing the life of the bearing. Reduce the life of the fan itself. Therefore, the lubrication problem of bearings has always been the focus of the field of cooling fans. As shown in FIG. 7, the conventional heat dissipating fan includes a rotor 1, a fan frame 4 having a center pillar 5, and a center of the center pillar 5 forming a through hole 7, and a bearing 3 is received in the through hole 7. An axial through hole is formed in the bearing 3, and the rotating shaft 6 200844335 1 2 extends downward from the center of the rotor and is received in the through hole of the bearing 3. The lubricating oil is filled between the rotating shaft 2 and the bearing 3 to rotatably support the rotor 1 . A m oil ring 6 is disposed on the rotating shaft 2 and located at the top end of the bearing 3, and a slot (not shown) is formed between the oil ring 6 and the center column 5. When the cooling fan is in operation, the lubricating oil will climb through the slot after climbing along the rotating shaft 2 (as indicated by the dotted line in the figure). The lubricating property of the bearing 3 is also gradually lowered as the lubricating oil is lost, and the friction between the rotating shaft 2 and the bearing 3 is increased. The noise is increased due to insufficient lubrication, and the shaft 2 is easily worn, which shortens the life of the fan. In addition, the addition of the oil ring 6 results in the need to add additional components on the basis of the original cooling fan, which will increase the material and process cost, and also increase the assembly process, which is not cost competitive in the market. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a φ thermal fan which has a longer service life and prevents little extra cost by preventing leakage of lubricating oil. At the same time, it is also necessary to provide a stator insulation sheet structure that achieves the above effects. A cooling fan includes a frame, a rotor member and a certain sub-member. The bottom of the fan frame protrudes from the bottom to form a shaft seat, and a bearing with an axial through hole is received in the shaft seat, and the rotor member has a receiving body. a rotating shaft in the through hole of the bearing, the stator member is sleeved on the outer edge of the shaft seat, and includes upper and lower insulating sheets and a plurality of layers of stone slabs sandwiched between the upper and lower insulating sheets. The insulating sheet integrally extends to the inner side of the center of the shaft 7 200844335 'the center of the heart to form a oil-bearing structure that extends to an outer surface close to the shaft. / A stator insulating sheet structure comprising - cylindrical soil. The wall portion of the wall is uniformly spaced radially outwardly from the circumference of the bottom edge to form a plurality of extending arms which integrally extend radially inwardly around the circumference of the top edge to form an oil retaining structure. Compared with the prior art, the oil-dissipating structure of the cooling fan and the insulating sheet of the stator structure are integrally formed to prevent leakage of lubricating oil, and on the other hand, the additional components are reduced, thereby saving material and process cost and simplifying. Assembly process. [Embodiment] Hereinafter, the present invention will be further described with reference to the accompanying drawings. Referring to Figure 1, the 5th cooling fan includes a frame such as a bearing system 60, a stator member 20, and a rotor member 1A, the rotor member 10 corresponding to the periphery of the stator member 2Q, the rotor member 1 () and the stator structure 〇 2 收容 are housed in the fan frame 30, respectively. The frame 30 includes a bottom portion 32 and a shaft seat 34 which is formed to protrude upward from the center of the bottom portion 32 of the frame. The top end of the shaft seat 34 is an open top end, and a receiving space 36 is formed in the center. An annular recess 38 is formed in the inner circumference of the top end of the shaft seat 34, and the annular recess 38 is in communication with the receiving space. The stator member 20 includes a circuit board 26, an armature 22 formed by stacking a plurality of layers of silicon steel sheets fixed on the circuit board 26, and upper and lower ends of the armature 22, a lower insulating sheet and two ribs. Armature 22 8 200844335 The outer winding wire 24 is used to generate an alternating magnetic field and is electrically connected to the circuit board 26 via the winding 24. The insulating sheets 28a and 2 ribs prevent the armature 22 from being in electrical contact with the winding 24. The rotor member ίο includes a hub 12 and a rotating shaft 18, and a plurality of blades 14 are radially protruded from the outer edge of the hub 12. A magnet ring 16 is attached to the inner edge of the hub 12. A hub 12 12 is formed in the center of the hub 12. The top end of the rotating shaft 18 is fixed to the rotating shaft seat 12 , and extends downward. The bearing system 60 includes a bearing 61, a retaining ring 63 and a gasket 67 made of a highly wear resistant material that is received in its receiving space 36 by the open top end of the axle seat 34. A central through hole 630 is formed in the center of the buckle 63. Referring to FIG. 2 and FIG. 3, a perspective view and a cross-sectional view of the upper insulating sheet 28a, the upper insulating sheet 28a includes a cylindrical wall portion 281, and the bottom edge of the wall 4 281 is uniformly spaced outwardly and outwardly. Four extension arms 282' are formed for winding the windings 24; at the same time, the circumference of the top edge of the wall portion 281 integrally extends radially inward to form an oil retaining structure 283, and a center of the oil retaining structure 283 forms a through hole 284. The oil retaining structure 283 includes a horizontal connecting portion 283a extending horizontally inwardly from a top edge of the wall portion 281, and a vertical connecting portion 283b formed vertically from a distal end of the horizontal connecting portion 283a. An oil retaining ring 283c is formed to extend horizontally inward from the bottom end of the vertical connecting portion 283b. The height of the vertical connecting portion 283b is equal to the south of the top end of the shaft seat 34 forming the %-shaped recess 38. The through hole 284 is provided at the center of the oil slinger 283c so as to extend through the rotating shaft 18, and the inner diameter of the through hole 284 is slightly larger than the outer diameter of the rotating shaft 18. In this embodiment, a gap of about 5 mm is formed between the rotating shaft 18 and the oil retaining ring 9 200844335 ring 283c. The fan is operated on a daily basis, and the gap can avoid the oil retaining ring 283 (the friction is directly contacted with the rotating shaft to generate friction. The cleaning device according to FIG. 4 and FIG. 5 is an assembled view and a cross-sectional view of the cooling fan, and the bearing system 60 is accommodated. In the receiving space 36 of the shaft seat 34, the gasket 67 is located at the bottom of the receiving space 36 of the shaft seat 34. The bottom end of the shaft seat 34 also protrudes inwardly to form a step 31. The outer surface of the rotating shaft 18 is near the top end thereof. The position is recessed inwardly to form an annular groove 18〇, and the outer surface of the rotating shaft 18 is recessed inwardly at a position near the free end 186 of the bottom end thereof to form another annular recess 184. The buckle 63 The diameter of the central through hole 630 is squeezing through the free end 186 of the rotating shaft 18, so that the retaining ring 63 is sleeved at the recess 184 of the rotating shaft 18 and located at the bottom end 65 of the bearing 61 and the shaft seat 34. Between the steps 31, the buckle 63 and the recess 184 cooperate to limit the axial movement of the rotating shaft 18. The rotating shaft 18 passes through the oil retaining structure 283 of the top of the insulating sheet 28a above the setting sub-member 2', and the freedom of the packing 67 and the rotating shaft 18 The end 186 is in conflict with, rotatably supporting the rotating shaft 18, thereby assembling the rotor The stator member 2 is sleeved and fixed on the outer edge of the shaft seat 34, and the horizontal connecting portion 283a of the oil retaining structure 283 of the upper insulating sheet 28a is in contact with the top end of the shaft seat 34, and the vertical connecting portion 283b is in close contact with each other. At the inner wall of the opening, the slinger 283c can be carried in the annular recess 38 at the top end of the opening of the shaft seat 34, and the inner circumference of the slinger 283c is close to the outer surface of the shaft 18. Please refer to FIG. 6 together. An axial through hole 62 is formed in the bearing 61 for extending through the rotating shaft 18. The inner diameter of the inner portion of the bearing 61 is 200844335 == after the bottom end portion 65, that is, the middle of the axial through hole 62 is the end of the wire The diameter of the part is thus formed between the middle of the bearing 61 = _ gamma - (four) 7G. The space paste fills the run: 'the face can increase the total amount of lubricant =. Make the ends of the bearing (10) -
:二了軸承61與轉軸18之間之接觸面積，從而減少 ^ Γ間之摩擦，使得轴承61作用類似於兩個滚珠 1。軸承兩末端64、65與轉軸18之間形成-大約為 :〇2.5mm之縫隙，並在兩末端料、沾之外表面 :開口處分別形成圓弧倒角，從而減少風扇運轉時潤 ’月油之洩漏，也便於軸承61裴設。 轴承61外表面形成有複數溝道⑽，與轴承^之轴 向軌62相連通，以供潤滑油回流。任—溝道68包括 ~呈弧線狀延伸之兩第一部分68〇以及位於軸承“之 ㈣周表面66上之-第二部分682，該兩第_部分_ 分別位於軸承兩末端64，65表面上。位於軸承61頂表 面640之第一部分68〇從通孔62向外圓周表面66沿風 扇之旋轉方向向外彎折延伸，本實施例中，風扇之旋 轉方向為逆時針方向，從而第一部分68〇向外彎折延 伸之方向也為逆時針方向。當風扇需要順時針方向旋 轉時’該第一部分680也可以沿時針方向向外彎折延 伸以便引導外泄之潤滑油能通過溝道6 8回流。 該軸承61之頂端64比軸座34之開口頂端低，擋油 環283c與軸承61之頂端64間隔一定之間距，轴承61、 11 200844335 • 擋油環283c與軸座34共同限定形成一儲油空間5〇，該 , 儲油空間50與軸承61之通孔62連通。轉軸18頂端之凹 槽180位於擋油環283c與轴承61之頂端64之間，並與儲 油空間50相連通。 該風扇工作時，定子構件20和轉子構件1〇磁場之 父互作用驅動轉子10旋轉。由於擔油環與轉軸18 之間形成之間隙寬度足夠小，由於離心力作用沿轉軸 # 18飛濺出來之潤滑油，通過擋油環283c之阻擋，^乎 全部被聚集在儲油區5〇，而防止外泄，最後沿軸承& 上之溝道68回流至軸承61内，從而充分地防止了潤滑 油從軸承61洩漏，保證了轴承61與轉軸18之間良好之 =潤滑性能，減少磨損，降低噪音，提高了風扇之品 貝，延長了風扇使用壽命。且擋油環283c與上絕緣片 28a —體成型’不需要在原散熱風扇之基礎上增加額外 之元件，從而節約材料以及製程成本，並簡化組裝工 ❿ 序。 綜上所述，本發明符合發明專利要件，爰依法提出專 利申凊。惟，以上所述者僅為本發明之較佳實施例，舉凡 无、心本案技#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係本發明散熱風扇之立體分解示意圖。 圖2係圖1中上絕緣片之立體放大示意圖。 圖3係圖2沿瓜―瓜線之剖視圖。 12 200844335 圖4係圖1之一立體組合示意圖。 圖5係圖4沿V-V線之剖面示意圖。 圖6為圖1中散熱風扇軸承之放大示意圖 圖7為習知散熱風扇示意圖。 【本發明主要元件符號說明】 10 輪轂 120 扇葉 16 轉軸 180 凹陷 186 定子構件 22 繞線 26 上絕緣片 28b 壁部 282 擋油結構 283a 豎直連接部 283c 穿孔 30 台階 32 軸座 36 環形凹陷 50 軸承系統 61 通孔 63 中心通孔 64 頂表面 65 外圓周表面 680 第二部分 70 12 14 18 184 20 24 28a 281 283 283b 284 31 34 38 60 62 630 640 66 682 轉子構件 轉軸軸座 磁鐵環 凹槽 ® 自由端 電框 電路板 下絕緣片 延伸臂 水平連接部 擋油環 扇框 底部 收容空間 • 儲油空間 轴承 扣環 頂端 底端 第一部分 空間 軸框圈 轉扇油 2 4 6 【先前技術元件符號說明】 轉子 1 軸承 3 中柱 5 13: The contact area between the bearing 61 and the rotating shaft 18 is reduced, thereby reducing the friction between the turns, so that the bearing 61 acts like two balls 1. Between the two ends 64, 65 of the bearing and the rotating shaft 18, a gap of about 2.5 mm is formed, and a circular chamfer is formed at the end of the material and the surface of the outer surface: the opening is reduced, thereby reducing the running time of the fan. The leakage of oil also facilitates the installation of the bearing 61. A plurality of channels (10) are formed on the outer surface of the bearing 61 to communicate with the axial rails 62 of the bearings for backflow of the lubricating oil. The any-channel 68 includes two first portions 68 延伸 extending in an arc shape and a second portion 682 on the (four) circumferential surface 66 of the bearing, the two _ portions being respectively located on the surfaces of the ends 64, 65 of the bearing The first portion 68 of the top surface 640 of the bearing 61 is bent outwardly from the through hole 62 to the outer circumferential surface 66 in the direction of rotation of the fan. In this embodiment, the direction of rotation of the fan is counterclockwise, so that the first portion 68 The direction in which the 弯 outward bends is also counterclockwise. When the fan needs to rotate clockwise, the first portion 680 can also be bent outward in the hour hand direction to guide the leaked lubricating oil through the channel 6 8 The top end 64 of the bearing 61 is lower than the open top end of the shaft seat 34, and the oil slinger 283c is spaced apart from the top end 64 of the bearing 61 by a certain distance. The bearings 61, 11 200844335 • The slinger 283c and the shaft seat 34 are jointly defined to form a The oil storage space is 5〇, and the oil storage space 50 communicates with the through hole 62 of the bearing 61. The groove 180 at the top end of the rotating shaft 18 is located between the oil retaining ring 283c and the top end 64 of the bearing 61, and is connected to the oil storage space 50. When the fan is working The parent interaction of the stator member 20 and the rotor member 1 驱动 magnetic field drives the rotation of the rotor 10. Since the gap formed between the oil slinger and the rotating shaft 18 is sufficiently small, the lubricating oil splashed along the rotating shaft #18 due to centrifugal force passes through the block. The block of the oil ring 283c is all collected in the oil storage area 5〇, and prevents leakage, and finally flows back into the bearing 61 along the groove 68 on the bearing & to sufficiently prevent the lubricating oil from leaking from the bearing 61. It ensures good lubrication performance between the bearing 61 and the rotating shaft 18, reduces wear and reduces noise, improves the product of the fan, and prolongs the service life of the fan. The oil retaining ring 283c and the upper insulating piece 28a are integrally formed. It is necessary to add additional components to the original cooling fan, thereby saving materials and process costs, and simplifying the assembly process. In summary, the present invention complies with the invention patent requirements, and patents are filed according to law. The present invention is only a preferred embodiment of the present invention, and the equivalent modification or variation of the person in the spirit of the present invention should be included in the following. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective exploded view of the heat dissipating fan of the present invention. Fig. 2 is a perspective enlarged view of the upper insulating sheet of Fig. 1. Fig. 3 is a cross-sectional view of Fig. 2 taken along the line of melon and melon. Figure 4 is a schematic view of a three-dimensional combination of Figure 1. Figure 5 is a schematic cross-sectional view of Figure 4 along the line VV. Figure 6 is an enlarged schematic view of the heat-dissipating fan bearing of Figure 1. Figure 7 is a schematic diagram of a conventional cooling fan. Component symbol description] 10 Hub 120 Blade 16 Rotary shaft 180 Depression 186 Stator member 22 Winding 26 Upper insulating sheet 28b Wall 282 Oil retaining structure 283a Vertical joint 283c Perforation 30 Step 32 Shaft seat 36 Annular recess 50 Bearing system 61 Hole 63 Center through hole 64 Top surface 65 Outer circumferential surface 680 Second portion 70 12 14 18 184 20 24 28a 281 283 283b 284 31 34 38 60 62 630 640 66 682 Rotor member Shaft shaft seat magnet ring groove ® free end Frame circuit board lower insulation sheet extension arm horizontal connection part oil retaining ring fan frame bottom receiving space • oil storage space bearing buckle top end first part Space Axis frame ring Fan oil 2 4 6 [Record description of prior art components] Rotor 1 Bearing 3 Center column 5 13