200939940 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-種適用於發熱電子 • 元件散熱之散熱風扇。 【先前技術】 散熱風扇為電腦散熱系統之_關鍵組成部件，提高散 熱風扇之運行壽命、可靠性對保障電腦系統之穩定運行至 ❹ 要。而散減扇之軸承組件設計對提高憾風扇之使 用壽命、降低噪音起著舉足輕重之作用。 由於滾珠軸承具有摩擦阻力小及功率消耗低之特性， 且滾珠軸承之使用壽命較長’散熱風扇開始逐步採用雙滾 珠軸承結構。然滚珠軸承之滾珠與保持架之間存在間隙， 並非完全緊密配合。故在高速旋轉之情況下，滾珠轴承之 内、外圈之徑向及軸向相對位移量較大，使得轉軸與滾珠 軸承之内圈-起偏擺，並與滾珠轴承之外圈成一夹角，這 ❹ 使得散熱風扇工作不穩定，產生較大嗓音。另，由於滾珠 轴承成本偏高，業界亦採用成本更低之含油轴承來替代雙 滾珠轴承、、才冓然，如果不能向含油轴承供給充足之潤滑 油’則會嚴重影響含油軸承之使用壽命，進而影響散熱風 扇之使用壽命。 【發明内容】 雲於此，有必要提供一種澡音較低且具有較佳潤滑性 能之散熱風扇。 6 200939940 種散熱風扇，包括_軸承座、 及一轉子，該轉子句括一絲4 軸承組件、一定子 内， 含油軸承及 該軸承組件⑽—冑 ，該轉純料該軸承座 内，該轉_ 含㈣料料該軸承座 軸承設置並對該滾珠軸承提供預緊力，該儲 包括一滾珠軸承、一彈性元件、 承設置以對該含油軸承提供潤滑200939940 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 suitable for heat dissipation of a heat-generating electronic component. [Prior Art] The cooling fan is the key component of the computer cooling system, which improves the operating life and reliability of the cooling fan to ensure the stable operation of the computer system. The design of the bearing assembly of the scatter fan plays an important role in improving the life of the fan and reducing the noise. Since the ball bearing has the characteristics of low frictional resistance and low power consumption, and the service life of the ball bearing is long, the cooling fan begins to adopt a double ball bearing structure. However, there is a gap between the ball of the ball bearing and the cage, which is not completely tight fit. Therefore, in the case of high-speed rotation, the radial and axial relative displacement of the inner and outer rings of the ball bearing is large, so that the inner ring of the rotating shaft and the ball bearing is yawed and forms an angle with the outer ring of the ball bearing. This makes the cooling fan unstable and produces a loud voice. In addition, due to the high cost of ball bearings, the industry also uses lower-cost oil-bearing bearings instead of double-ball bearings, and if it can't supply sufficient oil to oil-bearing bearings, it will seriously affect the service life of oil-bearing bearings. In turn, it affects the service life of the cooling fan. SUMMARY OF THE INVENTION In view of this, it is necessary to provide a cooling fan having a low bath sound and a good lubricity. 6 200939940 kinds of cooling fan, including _ bearing seat, and a rotor, the rotor sentenced by a wire 4 bearing assembly, a certain inner, oil bearing and the bearing assembly (10) - 胄, the rotating pure material in the bearing seat, the turn _ Containing (4) material, the bearing seat bearing is arranged and provides a pre-tightening force to the ball bearing, the storage comprises a ball bearing, an elastic component, and a bearing to provide lubrication to the oil bearing
之圓環蓋及扣環限制彈性元件及滾珠轴承二= ==性變形，壓_珠軸承上，從 y、 、 /肖除滾珠軸承中之軸向游隙，其内、外 圈之徑向及軸向相對移動量相對未預緊之滾珠軸承大大地 減少，並且含油軸承限制轉軸之徑向運動， 工作時轉轴之振動，降低嗓音，儲油树則向含油:承二 供充足之潤滑油，延長散熱風扇之使用壽命。 【實施方式】 下面參照圖示，結合實施例詳細說明本發明之散熱風 扇。 如圖1所示’該散熱風扇1包括扇框10、定子20、可 以相對定子20轉動之轉子30、軸承組件33及一底蓋337。 處根10包括基座11及圍没於基座外圍之側壁12， 定子20及轉子30收容於扇框10内。基座u之中央向上 凸設形成一軸承座111 ’沿中心軸線在軸承座111内開設有 7 200939940 一階梯通孔1112’該階梯通孔1112包括位於下端之一大孔 1113及位於上端之一小孔1114，大孔1113及小孔1114之 • 間形成一台階1115，軸承座111之頂端沿徑向向内一體凸 . 設形成一突出部1111。 底蓋337呈杯狀’包括一底板3371及沿底板3371之 外緣向上凸設形成之侧壁3372，該底蓋337嵌入該大孔 1113之底端，該底蓋337之侧壁3372與該大孔1113之内 壁過盈配合，密封轴承座m之底端。 ® 轉子30包括輪數31、沿輪轂31外緣呈放射狀突設形 成之複數扇葉32及轉軸336,輪轂31内側緣貼設一永久磁 鐵環343。 轉軸336呈圓柱狀，收容於該軸承座ηι内，其一端 固定於輪轂31上’另一端向下延伸形成一自由端，轉轴336 之中間之外表面上形成一環形凹槽3361。 軸承組件33包括一滾珠軸承333、一彈性元件332、 ❹ 一扣環334、一含油軸承335及一儲油元件339，該滚珠轴 承333及該含油轴承335收容於該軸承座hi内，該轉軸 336穿設於該滾珠軸承333及該含油軸承335中，該扣環 334嵌設固定在環形凹槽3361上。 滾珠軸承333包括一内圈3331、一外圈3332及設置於 内圈3331及外圈3332之間之滚珠3333,内圈3331套設在 轉軸336上，外圈3332緊貼在軸承座1U之内壁上。 彈性元件332可為一彈簧或者伸縮套，中間形成有可 供轉轴336穿過之通孔。彈性元件332緊貼在軸承座m 8 ❹ Ο 200939940 之内壁上且沿軸向夾置於突出部1111及滾珠軸承333之外 圈3332之間。滚珠軸承333之内圈3331之下端抵靠扣環 334。含油軸承335位於扣環334之下方，沿軸向夾置於該 階梯通孔1112之台階1115及該底蓋337之側壁3372上^ 之間。 底蓋337之底部設有一哼磨片338用於與轉軸336之 自由端相抵靠，該耐磨片338為圓片形狀，其直徑與底蓋 337之内徑相當。耐磨片338設置在轉軸336之自由端與底 蓋337之間，可避免轉軸336與底蓋337直接磨擦，提高 轉軸336之使用壽命。 儲油元件339之材質為海綿或者吸油毛毡，呈圓筒狀， 環設於底蓋337之内壁，沿軸向嵌設於含油轴承335及财 磨片338之間，其上端抵靠於含油軸承335之下端，其内 捏大於轉轴336之軸徑，轉轴336穿過儲油元件339之内 孔。 定子20套設於軸承座m外圍，包括鐵心&縷繞於 鐵心23之線圈21、與線圈21電連接之電路心。該鐵心 23由複數層糊#疊設*成。兩絕緣架Μ分職於鐵心 之上下兩侧，該等絕緣架22均由塑膠材料製成，與鐵 圈之2^形狀相似。絕緣架22覆蓋於赖片之外側， 、，， 、鐵心23相分雜而達到將兩者之間絕緣之效 9 200939940 元件332預塵而發生彈 從而為滚珠轴承333提供在滾珠轴承333上，The ring cover and the buckle limit the elastic element and the ball bearing 2 === deformation, the pressure_bead bearing, the axial clearance in the ball bearing from y, , / /, the radial direction of the inner and outer rings And the axial relative movement amount is relatively reduced relative to the unpre-tightened ball bearing, and the oil-bearing bearing limits the radial movement of the rotating shaft, the vibration of the rotating shaft during operation, reduces the noise, and the oil storage tree is oily: the bearing is provided with sufficient lubrication Oil to extend the life of the cooling fan. [Embodiment] Hereinafter, a heat radiating fan of the present invention will be described in detail with reference to the accompanying drawings. As shown in Fig. 1, the heat dissipating fan 1 includes a fan frame 10, a stator 20, a rotor 30 rotatable relative to the stator 20, a bearing assembly 33, and a bottom cover 337. The root 10 includes a base 11 and a side wall 12 surrounding the periphery of the base. The stator 20 and the rotor 30 are received in the frame 10. The center of the base u is convexly formed upward to form a bearing seat 111. The central axis is opened in the bearing housing 111. 7 200939940 A stepped through hole 1112' includes a large hole 1113 at the lower end and one of the upper ends. A small hole 1114, a large hole 1113 and a small hole 1114 are formed with a step 1115, and the top end of the bearing housing 111 is integrally convex inward in the radial direction. A protrusion 1111 is formed. The bottom cover 337 is in the shape of a cup and includes a bottom plate 3371 and a side wall 3372 which is protruded upwardly along the outer edge of the bottom plate 3371. The bottom cover 337 is embedded in the bottom end of the large hole 1113, and the side wall 3372 of the bottom cover 337 is The inner wall of the large hole 1113 has an interference fit and seals the bottom end of the bearing housing m. The rotor 30 includes a number of wheels 31, a plurality of blades 32 and a rotating shaft 336 which are radially formed along the outer edge of the hub 31, and a permanent magnet ring 343 is attached to the inner edge of the hub 31. The rotating shaft 336 is cylindrical and received in the bearing housing ηι, one end of which is fixed to the hub 31. The other end extends downward to form a free end, and an annular groove 3361 is formed on the outer surface of the rotating shaft 336. The bearing assembly 33 includes a ball bearing 333, an elastic member 332, a snap ring 334, an oil bearing 335 and an oil storage member 339. The ball bearing 333 and the oil bearing 335 are received in the bearing housing hi. The 336 is disposed in the ball bearing 333 and the oil bearing 335. The buckle 334 is embedded and fixed on the annular groove 3361. The ball bearing 333 includes an inner ring 3331, an outer ring 3332, and a ball 3333 disposed between the inner ring 3331 and the outer ring 3332. The inner ring 3331 is sleeved on the rotating shaft 336, and the outer ring 3332 is closely attached to the inner wall of the bearing housing 1U. on. The elastic member 332 may be a spring or a telescopic sleeve formed with a through hole through which the shaft 336 can pass. The elastic member 332 abuts against the inner wall of the bearing housing m 8 ❹ Ο 200939940 and is axially sandwiched between the projection 1111 and the outer ring 3332 of the ball bearing 333. The lower end of the inner ring 3331 of the ball bearing 333 abuts against the buckle 334. The oil bearing 335 is located below the buckle 334 and is axially sandwiched between the step 1115 of the stepped through hole 1112 and the side wall 3372 of the bottom cover 337. The bottom of the bottom cover 337 is provided with a honing plate 338 for abutting against the free end of the rotating shaft 336, which is in the shape of a disk having a diameter equivalent to the inner diameter of the bottom cover 337. The wear plate 338 is disposed between the free end of the rotating shaft 336 and the bottom cover 337 to prevent direct friction between the rotating shaft 336 and the bottom cover 337, thereby improving the service life of the rotating shaft 336. The oil storage element 339 is made of a sponge or an oil-absorbing felt, and has a cylindrical shape. The ring is disposed on the inner wall of the bottom cover 337, and is axially embedded between the oil-impregnated bearing 335 and the enrichment piece 338, and the upper end thereof abuts against the oil-impregnated bearing. At the lower end of the 335, the inner pinch is larger than the shaft diameter of the rotating shaft 336, and the rotating shaft 336 passes through the inner hole of the oil storing member 339. The stator 20 is sleeved on the periphery of the bearing housing m, and includes a core & a coil 21 wound around the core 23 and a circuit core electrically connected to the coil 21. The core 23 is formed by stacking multiple layers of paste #. The two insulating frames are divided into upper and lower sides of the core, and the insulating frames 22 are made of a plastic material, similar to the shape of the iron ring. The insulating frame 22 covers the outer side of the lamella, and the core 23 is mixed to achieve the effect of insulating the two. 9 200939940 The component 332 is pre-dusted and elasticized to provide the ball bearing 333 on the ball bearing 333.
荷，其内1扇1運轉時’滚珠轴承如受到工作载 大減少，進及轴向相對移動量相對未預緊時大 承333之馳回/、Μ 333之旋轉精度’增加滚珠軸 降低聲立a ’減少散熱風扇1工作時轉# 336之振動， 故轉子、1 3油轴承335難得轉轴336還受到徑向約束， ΖΓ之軸更加敎，縣散域扇1之使用壽命。 339之材質為海綿或者吸油修含浸有潤滑油， ^ 承335本身一般也製成多孔結構，可以產生毛 吸收儲油元件339中潤滑油，另，由於儲油元件 置在接近轉軸336之自由端位置’可以起到很好之儲 由作用風扇1不工作時，該儲油元件339吸收大量之潤 滑油儲存起來，提供給風扇i工作時使用；而風扇i工作 時’該儲油元件339也能借助毛細作用將遍佈於含油轴承 335之潤滑油吸收回來，構成潤滑油之密封循環，為含油軸 承335與轉軸336之間運轉提供持久之潤滑，故延長含油 軸承335之工作壽命。本實施例中，採用滾珠軸承333與 含油軸承335相互組合之方式，既可以控制整體之成本， 也可以實現良好之潤滑效果。 圖2示出本發明之又一較佳實施例，與第一實施例不 同之處在於，除設置如第一實施例之儲油元件339，還包括 一呈環狀或圓筒狀之儲油元件340,該儲油元件340環設於 5亥車4承座111之内壁’沿軸向嵌設於轴承座111之台階115 200939940 二335之間，儲油元件340之下端緊貼含油軸承 油元=，其内徑大於轉軸336之軸徑’轉她穿過儲 认=0。儲油元件增加對含油軸承335之潤滑油供 起Γ更均勾分配潤滑油之效果，延長含油軸承 335之工作壽命。Load, when one fan is running, the ball bearing is reduced by the working load, the relative movement of the axial direction is relatively unpreloaded, and the rotation of the large bearing 333 is reversed, and the rotation precision of the 333 333 increases the ball axis to reduce the sound. Stand a 'reducing the vibration of the cooling fan 1 when turning #336, so the rotor, 13 oil bearing 335 rare shaft 336 is also subject to radial constraints, the axis of the ΖΓ is even more ambiguous, the service life of the county spoke fan 1. The material of 339 is sponge or oil-absorbing and impregnated with lubricating oil. ^ The bearing 335 itself is also generally made of a porous structure, which can generate lubricating oil in the hair absorbing oil storage component 339. In addition, since the oil storage component is placed near the free end of the rotating shaft 336 The position 'can function well. When the fan 1 is not working, the oil storage element 339 absorbs a large amount of lubricating oil and stores it for use when the fan i is in operation; and when the fan i is in operation, the oil storage element 339 The lubricating oil distributed around the oil-containing bearing 335 can be absorbed by capillary action to form a sealing cycle of the lubricating oil, which provides long-lasting lubrication for the operation between the oil-impregnated bearing 335 and the rotating shaft 336, thereby prolonging the working life of the oil-impregnated bearing 335. In the present embodiment, the ball bearing 333 and the oil-impregnated bearing 335 are combined with each other to control the overall cost and achieve a good lubricating effect. Fig. 2 shows still another preferred embodiment of the present invention, which differs from the first embodiment in that, in addition to the oil accumulating member 339 as in the first embodiment, an oil reservoir in an annular or cylindrical shape is included. The component 340 is disposed on the inner wall of the 5th car 4 socket 111 and is axially embedded in the step 115 of the bearing housing 111 between 200939940 and 335. The lower end of the oil storage component 340 is closely attached to the oil bearing oil. Yuan =, its inner diameter is larger than the shaft diameter of the shaft 336 'turns her through the storage =0. The oil storage component increases the effect of lubricating the lubricating oil of the oil-impregnated bearing 335 to more uniformly distribute the lubricating oil, and prolongs the working life of the oil-impregnated bearing 335.
f 3不出本發明之再—較佳實施例，與第—實施例不 二處在於’含油軸承435之下端之外表面上開設有一環 7 使含油軸承435之外表面呈階梯狀，該環槽物 包括一軸肩部4352及-軸頸部備。儲油元件34i設於環 槽410内，並位於軸頸部4351及抽承座m之間，沿轴向 抵緊於軸肩部4352及底蓋337之間。儲油元件撕既可以 向含油軸承435供給满滑油，也可以起到密封作用，防止 潤滑油洩漏及阻止灰塵等雜質進入。 圖4示出本發明之另一較佳實施例，與第一實施例不 同之處在於’含油軸承635之底部料，含油袖承奶内 沿中心軸線開設有一供轉轴336套設於其中之盲孔6353， 故含油軸承635之上端開口，而底端封閉。含油軸承635 之上端之外表面上開設有一環槽61〇，使含油軸承635之外 表面呈階梯狀，該環槽610包括一軸肩部6352及一轴頸部 6351。在盲孔6353之底部設有一耐磨片338用於與轉軸336 之自由端相抵靠。含油轴承635嵌於軸承座m之大孔m3 之末端。儲油元件342設於環槽610内，並位於軸頸部6351 及軸承座ill之間，而下端抵靠於軸肩部6352。該含油轴 承635直接給轉轴336提供軸向推力，使得散熱風扇1結 11 200939940 * . » 構更緊湊。儲油元件342向含油軸承635供給潤滑油，延 長含油軸承635之工作壽命。 . 綜上所述，本發明符合發明專利之要件，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 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。 【圖式簡單說明】 〇 圖1為本發明之一較佳實施例之散熱風扇剖面示意圖。 圖2為本發明之又一較佳實施例之散熱風扇剖面示意 圖。 圖3為本發明之再一較佳實施例之散熱風扇剖面示意 圖。 圖4為本發明之另一較佳實施例之散熱風扇剖面示意 圖。 【主要元件符號說明】 e 散熱風扇 1 基座 11 突出部 1111 大孔 1113 台階 1115 定子 20 絕緣架 22 電路板 24 屬框 轴承座 階梯通孔 I112 小孔 1114 側壁 12、3372 線圈 21 鐵心 23 轉子 3〇 12 200939940 輪轂 31 扇葉 32 軸承組件 33 彈性元件 332 滚珠軸承 333 内圈 3331 外圈 3332 滾珠 3333 扣環 334 含油轴承 335 > 435 ' 635 底蓋 337 底板 3371 耐磨片 338 儲油元件 339、340 ' 341 、 342 轉軸 336 環形凹槽 3361 磁鐵環 343 環槽 410 、 610 軸頸部 4351、 6351軸肩部 4352 、 6352 盲孔 6353f 3 does not show a further embodiment of the present invention, and the second embodiment differs from the first embodiment in that a ring 7 is formed on the outer surface of the lower end of the oil-impregnated bearing 435 such that the outer surface of the oil-impregnated bearing 435 is stepped. The trough includes a shoulder portion 4352 and a shaft portion. The oil storage member 34i is disposed in the annular groove 410 between the journal portion 4351 and the suction socket m and axially abuts between the shoulder portion 4352 and the bottom cover 337. The oil-removing element tearing can supply the oil-impregnated bearing 435 with full oil or a sealing function to prevent the lubricating oil from leaking and preventing the entry of impurities such as dust. Figure 4 shows another preferred embodiment of the present invention, which differs from the first embodiment in that the bottom of the oil-impregnated bearing 635 has a shaft 336 disposed therein along the central axis of the oil-containing sleeve. The blind hole 6353 is such that the upper end of the oil-impregnated bearing 635 is open and the bottom end is closed. An annular groove 61 is formed on the outer surface of the upper end of the oil-impregnated bearing 635, so that the outer surface of the oil-impregnated bearing 635 is stepped. The annular groove 610 includes a shoulder portion 6352 and a journal portion 6351. A wear plate 338 is provided at the bottom of the blind hole 6353 for abutting against the free end of the rotating shaft 336. The oil bearing 635 is embedded in the end of the large hole m3 of the bearing housing m. The oil storage element 342 is disposed in the annular groove 610 and located between the journal portion 6351 and the bearing housing ill, and the lower end abuts against the shoulder portion 6352. The oil bearing bearing 635 directly provides axial thrust to the rotating shaft 336, so that the cooling fan 1 is more compact. The oil reservoir element 342 supplies lubricating oil to the oil-impregnated bearing 635 to extend the working life of the oil-impregnated bearing 635. In summary, the present invention complies with the requirements of the invention patent, and proposes a patent application according to law. However, the above-mentioned preferred embodiments of the present invention are intended to be within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a heat dissipating fan according to a preferred embodiment of the present invention. Fig. 2 is a schematic cross-sectional view showing a heat dissipating fan according to still another preferred embodiment of the present invention. Figure 3 is a cross-sectional view showing a heat dissipating fan in accordance with still another preferred embodiment of the present invention. Figure 4 is a cross-sectional view showing a heat dissipating fan in accordance with another preferred embodiment of the present invention. [Main component symbol description] e Cooling fan 1 Base 11 Projection 1111 Large hole 1113 Step 1115 Stator 20 Insulation frame 22 Circuit board 24 Frame bearing block Stepped through hole I112 Small hole 1114 Side wall 12, 3372 Coil 21 Core 23 Rotor 3 〇12 200939940 Hub 31 Fan blade 32 Bearing assembly 33 Elastic element 332 Ball bearing 333 Inner ring 3331 Outer ring 3332 Ball 3333 Buckle 334 Oil bearing 335 > 435 ' 635 Bottom cover 337 Base plate 3371 Wear plate 338 Oil storage element 339, 340 ' 341 , 342 shaft 336 ring groove 3361 magnet ring 343 ring groove 410 , 610 shaft neck 4351 , 6351 shaft shoulder 4352 , 6352 blind hole 6353
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