.1303694 '九、發明說明： 【發明所屬之技術領域】 本發明涉及一種風扇，尤指一種工業風扇。 【先前技術】 現代科技日新月異，精密電子產品的運轉功率日益提 高，然而功率強大的產品使用時不可避免的會產生高溫， 從而形成產品使用時的隱患，因此諸多精密產品中皆設有 φ風扇以達到產品的散熱要求。 如圖5所示，為一習知風扇9〇的剖視圖，該風扇包括一 收谷於扇框91中的定子92及一轉子93，一滑動軸承94安裝 於定子的套筒95内，一油封80裝置於套筒95底部，滑動軸 承94與油封80之間形成一中空區域82，轉子93的轉軸96穿 設於該滑動軸承94中，且伸入該中空區域82。伸入中空區 域82轉軸23的末端處設有一環形凹槽97，用以套置一扣環 ⑩98以保證風扇1〇〇中轉轴23的軸向定位，從而避免該轉子93 在高速轉動時由於離心力作用從該滑動轴承94中甩出。 然而，對於一些運轉功率較大的風扇90，僅以一扣環 98作為轉子20的防脫結構是不夠的，當其運轉速度超過一 定值後，轉子20仍會從軸承94中甩脫。因此仍需進一步改 善。 【發明内容】 有鑒於此，有必要提供一種可高速穩定運轉的風扇。 一種風扇，包括一扇框，該扇框内形成一軸套；一滑 6 ，1303694 ’該轉子包 中的轉軸； 内且分別卡 -動軸承收容於該軸套中；一轉子置於該扇框中 括一本體及自該本體頂部延伸而出且伸入軸承 一第一及第二扣環軸向定位於所述扇框的軸套 置於該轉軸上。 相較於習知技術，所述風扇的轉軸上套置雙扣環，可 有效防止轉子在高速運轉時從轴承中甩㈤，同時還 防漏油的作用。 【實施方式】 請參閱圖1，本發明實施例一的風扇包括一扇框1〇、一 轉子20、一定子30、一滑動軸承4〇，及置於滑動軸承牝兩 端且用於轉子20防脫的第-及第二扣環50、7〇,其中轉子 20樞接於定子3〇内。 、 請結合參閱圖4，該扇框10具有一收容空間用以收容轉 子20和定子30，扇框1〇底部中央向上延伸設置一中空筒柱 狀的軸套11，㈣軸承40收容於轴套財，一端蓋二安裝 鲁於軸套11底部，請同時參閱圖2,該端蓋6〇頂部向上延伸設 置有複數頂塊62，這些頂塊62抵頂滑動軸承4〇底部，用以 支樓滑動軸承40防止風扇運轉時該滑動轴承4〇受到震動而 產生位置偏移，頂塊62内側形成一臺階62〇。定子3〇套設於 轴套11週邊。該軸#11内相應於滑動轴承4〇的底部設有一 儲油槽14,用以存儲潤滑油。自轴套工丄頂部一體彎折延伸 設有-擋圈110,該擋圈110包括一自轴套n頂部邊緣向其 内侧垂直L伸而成的環形連接部丄丄】和自連接部U1邊緣向 下垂直延伸而成的環形凸緣112，連接部ηι和凸緣内壁 7 .1303694 抵罪滑動轴承4〇頂部以防止潤滑油從滑動轴承4〇頂端泄 路0 滑動轴承40大致呈筒柱體狀，其具有一筒柱形本體〇 和一位於本體41軸心的中心孔410。本體41頂部邊緣向上垂 直延伸出複數凸塊42，以與轴套11的擋圈u〇配合，本體41 外表面與凸塊42相對應處向外形成有複數凸臺44以抵靠軸 套11内壁。 φ 該轉子20具有一本體22，該本體22包括一圓盤形頂部 和一自該頂部邊緣垂直延伸設置的圓筒形側壁，複數扇片 21自本體22侧壁外表面彎折延伸而出，本體22頂部中心形 成一轉軸座24，一轉軸23自該轉軸座24中央朝與側壁同侧 的方向垂直延伸而出且穿過滑動軸承4〇的中心孔41〇，該轉 軸23較上端與滑動軸承4〇頂部相應位置處開設一第一環形 凹槽231，第一扣環50卡設於該第一環形凹槽231内且夾置 於滑動軸承40本體的頂部與擋圈no之間，請同時參閱圖 φ 3’該第一扣環5〇呈圓盤狀，其具有一中心孔52及複數與中 心孔52相連通且對稱分佈於中心孔52周圍的開槽54，這些 開槽54用以增強第一扣環5〇的彈性變形，該第一扣環刈中 心孔52的直徑小於轉軸23的直徑大於第一環形凹槽231的 直徑。該轉軸23—端延伸具有一半球形引導部23〇，第二環 形凹槽232設於引導部230相鄰位置處，用以套置第二扣環 70 ’該第二扣環70形狀構造與第一扣環5〇相同，該第二扣 環70置於端蓋60凸塊62的臺階620上且抵靠滑動軸承4〇底 部。 8 1303694 • 風扇高速運轉時，設置於轉轴23上下兩端的第一及第 二扣環50，70可在軸向發揮阻擋作用，避免轉子20自滑動 軸承40向外脫離。該第一扣環5〇不僅可以起到防脫作用， 同時由於其置於軸承4〇頂部與擋圈11〇之間，故可進一步防 止風扇高速運轉時潤滑油自擋圈110的凸緣112與轉軸23之 間的間隙中甩出。 如是’本發明風扇的雙扣環可確保風扇高速穩定運轉。 _ 综上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上該者僅為本發明之較佳實施例，舉凡熟 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。 5 【圖式簡單說明】 圖1係本發明風扇之立體分解圖。 圖2係圖1中端蓋之立體放大圖。 圖3係圖1中第一扣環之立體放大圖。 _ 圖4係圖1之剖視圖。 圖5係習知技術風扇之剖視圖。 【主要元件符號說明】 [習知] 油封 80 中空區域 82 風扇 90 扇框 91 定子 92 轉子 93 套筒 95 轉軸 96 9 ,1303694.1303694 'IX. INSTRUCTIONS: TECHNICAL FIELD The present invention relates to a fan, and more particularly to an industrial fan. [Prior Art] With the rapid development of modern technology, the operating power of precision electronic products is increasing. However, the use of powerful products inevitably generates high temperatures, which poses a hidden danger in the use of products. Therefore, many precision products have φ fans. Meet the heat dissipation requirements of the product. As shown in FIG. 5, which is a cross-sectional view of a conventional fan 9A, the fan includes a stator 92 and a rotor 93 which are received in the fan frame 91. A sliding bearing 94 is mounted in the sleeve 95 of the stator, and an oil seal is provided. The device 80 is disposed at the bottom of the sleeve 95. A hollow region 82 is formed between the sliding bearing 94 and the oil seal 80. The rotating shaft 96 of the rotor 93 passes through the sliding bearing 94 and extends into the hollow region 82. An annular groove 97 is formed at the end of the rotating shaft 23 of the hollow portion 82 for arranging a buckle 1098 to ensure the axial positioning of the rotating shaft 23 of the fan 1 to avoid the rotor 93 being rotated at a high speed. The centrifugal force is extracted from the sliding bearing 94. However, for some fans 90 that operate at a higher power, it is not sufficient to use only one buckle 98 as the detachment prevention structure of the rotor 20. When the operating speed exceeds a certain value, the rotor 20 will still be detached from the bearing 94. Therefore, further improvement is still needed. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a fan that can operate at high speed and stably. A fan includes a frame, wherein a sleeve is formed in the frame; a slide 6, 1303694 'the rotating shaft in the rotor package; and the respective card-moving bearing is received in the sleeve; a rotor is placed in the frame A sleeve is disposed on the shaft and extends from the top of the body and extends into the bearing. The first and second buckles are axially positioned on the shaft frame. Compared with the prior art, the fan is sleeved with a double buckle on the rotating shaft, which can effectively prevent the rotor from being smashed from the bearing during high-speed operation, and at the same time prevent oil leakage. Embodiment 1 Referring to FIG. 1 , a fan according to a first embodiment of the present invention includes a frame 1 , a rotor 20 , a stator 30 , a sliding bearing 4 , and is disposed at both ends of the sliding bearing 且 for the rotor 20 . The first and second retaining rings 50, 7 are retaining, wherein the rotor 20 is pivotally connected within the stator 3. Referring to FIG. 4, the frame 10 has a receiving space for receiving the rotor 20 and the stator 30. A hollow cylindrical column 11 is extended upwardly from the center of the bottom of the fan frame, and the bearing 40 is received in the sleeve. The end cap 2 is installed on the bottom of the sleeve 11, please also refer to FIG. 2, the top cover 6 is extended upwardly with a plurality of top blocks 62, and the top blocks 62 abut the bottom of the sliding bearing 4〇 for the branch The sliding bearing 40 prevents the sliding bearing 4〇 from being vibrated to cause a positional shift when the fan is running, and a step 62〇 is formed inside the top block 62. The stator 3 is sleeved around the periphery of the sleeve 11. An oil reservoir 14 is provided in the bottom of the shaft #11 corresponding to the sliding bearing 4A for storing lubricating oil. An integral-bend 110 extends from the top of the sleeve, and the retaining ring 110 includes an annular connecting portion extending from the top edge of the sleeve n to the inner side thereof, and an edge of the self-connecting portion U1. The annular flange 112 extending vertically downward, the connecting portion ηι and the inner wall of the flange 71.3303694 are in violation of the top of the sliding bearing 4〇 to prevent the lubricating oil from leaking from the top end of the sliding bearing 4〇. The sliding bearing 40 is substantially cylindrical. It has a cylindrical body 〇 and a central hole 410 at the axis of the body 41. A plurality of protrusions 42 extend upwardly from the top edge of the body 41 to cooperate with the retaining ring u of the sleeve 11. The outer surface of the body 41 and the protrusion 42 are outwardly formed with a plurality of bosses 44 for abutting against the sleeve 11. Inner wall. φ The rotor 20 has a body 22 including a disc-shaped top portion and a cylindrical side wall extending perpendicularly from the top edge. The plurality of segments 21 are bent and extended from the outer surface of the side wall of the body 22. A rotating shaft seat 24 is formed at the center of the top of the main body 22. A rotating shaft 23 extends from the center of the rotating shaft seat 24 perpendicularly to the same side of the side wall and passes through the center hole 41 of the sliding bearing 4〇. The rotating shaft 23 slides from the upper end. A first annular groove 231 is defined at a corresponding position on the top of the bearing 4, and the first buckle 50 is locked in the first annular groove 231 and sandwiched between the top of the body of the sliding bearing 40 and the retaining ring no. Referring to FIG. φ 3 ′, the first buckle 5 〇 has a disk shape, and has a central hole 52 and a plurality of slots 54 communicating with the central hole 52 and symmetrically distributed around the central hole 52 . 54 is used to enhance the elastic deformation of the first buckle 5〇, the diameter of the first buckle central hole 52 is smaller than the diameter of the rotating shaft 23 is larger than the diameter of the first annular groove 231. The second end of the rotating shaft 23 has a half-spherical guiding portion 23, and the second annular groove 232 is disposed adjacent to the guiding portion 230 for accommodating the second buckle 70'. A buckle 5 is identical, and the second buckle 70 is placed on the step 620 of the projection 62 of the end cap 60 and abuts against the bottom of the sliding bearing 4 . 8 1303694 • When the fan is running at high speed, the first and second retaining rings 50, 70 provided at the upper and lower ends of the rotating shaft 23 can block in the axial direction to prevent the rotor 20 from being detached from the sliding bearing 40. The first buckle 5〇 can not only play the anti-offset function, but also is placed between the top of the bearing 4〇 and the retaining ring 11〇, so that the lubricating oil can be further prevented from the flange 112 of the retaining ring 110 when the fan is running at a high speed. It is scooped out from the gap between the rotating shaft 23. For example, the double buckle of the fan of the present invention ensures high-speed stable operation of the fan. _ In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only a preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be covered by the following claims. 5 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view of a fan of the present invention. Figure 2 is a perspective enlarged view of the end cap of Figure 1. 3 is a perspective enlarged view of the first buckle of FIG. 1. _ Figure 4 is a cross-sectional view of Figure 1. Figure 5 is a cross-sectional view of a prior art fan. [Main component symbol description] [Practical] Oil seal 80 Hollow area 82 Fan 90 Fan frame 91 Stator 92 Rotor 93 Sleeve 95 Rotary shaft 96 9 , 1303694
凹槽 97 扣環 98 [本發明] 扇框 10 軸套 11 擋圈 110 連接部 111 凸緣 112 儲油槽 14 轉子 20 扇葉 21 本體 22 轉軸 23 引導部 230 第一環形凹槽231 第二環形凹槽232 轉軸座 24 定子 30 滑動軸承 40 本體 41 中心孔 410 > 52 凸塊 42 > 62凸臺 44 第一扣環 50 開槽 54 端盖 60 臺階 620 第二扣環 70 10Groove 97 buckle 98 [Invention] Fan frame 10 Bushing 11 Retaining ring 110 Connecting portion 111 Flange 112 Oil sump 14 Rotor 20 Blade 21 Body 22 Rotating shaft 23 Guide portion 230 First annular groove 231 Second ring Groove 232 Shaft seat 24 Stator 30 Sliding bearing 40 Body 41 Center hole 410 > 52 Bump 42 > 62 Boss 44 First buckle 50 Slot 54 End cover 60 Step 620 Second buckle 70 10