P88997 九、發明說明： 【發明所屬之技術領域】 更詳而言之，係關於 本發明係有關於一種動壓|由承 可應用於主軸馬達之動壓軸承。 【先前技術】 隨著資訊時代的發展，使其相關儲存 對增加，而應用於儲存資料槽案之 H卞也相 漸往;ϋ雕I刑彳h π尸 Π 脰（如·光碟）反而逐 =:，發展’因此’藉由提高該载體之密 1储存之谷1，而為了提升帶動該载體之主轴馬達 k越的轉動特性，如··低噪音、 〜’、 辇a ' 同轉迷、高精度、長壽命 寺，目珂大多採用的方法以提升竽 炎 主軸馬達内軸承的性能 句主。 習用之轴承技術應用於^馬達時可分為含油轴承 (sleeve bearing)與滾珠軸承（Ball bearing)，該含油轴 t雖具有低單價優勢，但其壽命短、精度差，而該滾珠轴 ♦ 7雖㈣度南’但其成本高且耐撞擊能力差、噪音大，且 上速含油軸承及滾珠軸承由於軸與軸承内壁有接觸，而造 成^軸馬達的震動、嗓音與壽命問題，而動壓轴承則具備 低噪音、高精度、壽命長、耐衝擊之優勢，因此，主轴馬 達採用動壓軸承已漸漸成為主流。 上述之動壓軸承之原理係利用微細溝槽的流力特 眭’促使主軸與轴承間隙中充滿潤滑流體而達到充份潤滑 與建壓的效果，為了將該軸承間隙内的潤滑流體保存住， 。亥軸承之表面上刻有魚骨形狀（herringbone)的溝槽，除了 5 18613 1288997 « _可使亥主軸於紋轉時之流體壓力升高外，更可使潤滑流體 财於該轴承間隙内部達到防漏的功能，如美國專利公告 第6, 364, 532 B1號提出一種動壓軸承機構，其係在轴承之 内面或主軸之轴徑上刻有一組人字形溝槽，但由於上述主 軸小型化之後，該主軸馬達之底板到承座 的南度小於 $寻方、4mm，在该動壓軸承運轉過程中的建壓效果，由於 由製造與組裝偏心等造成壓力太小並不足於克服馬達轉子 鲁本身的不平衡量，以致於該主軸與該轴承是接觸的，因此 無法發揮動壓軸承的優越特性。 【發明内容】 广上述^知技術之缺點，本發明之主要目的在於提 七\、t重動壓軸承，係藉由套筒分別與轉軸及承座間的第一 動[單7L及第—動壓單兀之建壓加成作用，可使馬達轉動 時具有較佳之穩定性，且其動態偏擺值較佳。 本卷月之再一目的在於提供一種具有該動壓軸承之 主軸馬達，係上述之第—動壓單元及第二動壓單元，提升 動壓軸承的建壓作用’以克服馬達小型化所造成動壓轴承 建壓不足之現象。 為達上述目的，本發明提供_種動壓軸承，係用以轴 :妾-轉子單元，而該轉子單元包含—承座及一轉軸，該轉 軸，置於-套筒之軸孔中，該套筒之外壁套設該承座，亦 可藉由車由套谷置該套筒’該套筒底部設置一端面且有動 屢溝叙止推件，以支禮該轉軸。該軸孔與該轉轴之間具 有-弟-f接，且於該軸孔或該轉軸上财注有潤滑流體 18613 6 1288997 .之内動壓溝槽，藉由該内動壓溝槽與該第一間距形成一第 一動壓單元，而該外壁與該承座之間具有一第二間距，且 該外壁或該承座上刻有外動壓溝槽，該外動壓溝槽注有潤 :骨流體’藉由該外動壓溝槽與該第二間距形成一第二動壓 單^。上述之轉軸及套筒亦可均呈圓錐狀，使其同時具備 有徑向軸承與軸向止推軸承的功用，因此可省略止推件， 增加製作上之彈性及減少零件成本。 • 另，本發明提供—種具有該動㈣承之主軸馬達，係 動：轉：：早：f 一疋子早70 ’藉由該定子單元支撐並帶 力4子早兀轉動的動作，該轉子單元至少包含一承座、 二碟片夹持件、一止滑片、一磁鐵及一輛鐵，而 二广至少包含一鐵心繞線組件、-底板及-動壓軸 y二㈣軸承則藉由—套筒之軸孔容置該轉軸，且該套 间之外壁套設該承座，該軸孔與轉軸之間具有 該轉轴上之内動壓溝槽與該第 間距，藉由該外壁或該承座上之外動·：；！ 一弟二 形成-第二職單元。 卜紅溝槽與_二間距 本發明之動壓軸承及且 藉由上述之第，單元;第:動;二=:?達係 建=用，當該轉轴在轉動之過程中 二軸= 且該第-動犀罝弟-紅早兀的流體壓力大， 力的作用方向都為向左邊，使二;:=元的_ 定，、具有建屋加成作用，且該 18613 7 1288997 .第二動壓單元的流體壓力的值 壓力的0 5佴u p入 了達5亥弟一動壓單元的流體 i刀的U· 5倍以上，會將該轉 穩定運轉的目的，藉此可克服=結正，因而達到馬達 建壓不足之現象。 克服馬達小型化所造成動麗軸承 【實施方式】 及且有4寸疋的具體實例說明本發明之動屢軸承 動Μ軸承之主軸馬達實施方式，熟悉此技蔽之人 士可由本說明書所揭示之内容輕 ^ 點與功效。本發明亦可藉由1 的 ^月之其他優 赤庙田‘ ，、他不冋的具體實例加以施行 用'「在不書中的各項細節亦可基於不同觀點與應 用在不f子雄本發明之精神下進行各種修部盘變更。 叫面係本發明之動壓轴承之第-實施態樣 圖;圖所示：該動壓轴承軸接-轉子單元丨〇, 广子早兀1。包含一具有承座凸緣m 軸12，該轉細π罢私太Μ。 ^ 2i之外^ 筒21之轴孔213中，該套筒 =外=設該承座凸緣ln，且藉由一轴套㈡容置該套 同2卜该套筒21底部設置—端面具有動壓溝槽之止推件 A以切該轉軸12，而該承座凸緣lu _於該轉轴a 以形成轉動兀件’該承座n與該承座凸緣iu可為一體成 型’或分為兩個元件再藉由鉚接、緊配、鎖固結合等（如第 圖所不)’以增加製作之彈性。上述之軸孔2】3與轉軸12 之間具有-介於1"至5"的第一間距，且該軸孔M3 、-、有内動壓溝槽211 (如第3A圖所示），該内動壓溝槽2 j卫 '主有潤滑流體’藉由該内動壓溝槽211與該第一間距形成 18613 8 1288997P88997 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION In more detail, the present invention relates to a dynamic pressure bearing that is applied to a spindle motor. [Prior Art] With the development of the information age, its related storage pairs have increased, and the H卞 used in the storage of data slots has gradually evolved; the ϋ I I 彳 h π Π 脰 如 (such as · CD) instead =:, develop 'so' by increasing the density 1 of the carrier, and in order to improve the rotational characteristics of the spindle motor k that drives the carrier, such as low noise, ~', 辇a' The fascinating, high-precision, long-life temples, most of the methods used to improve the performance of the bearings in the sputum spindle motor. The conventional bearing technology can be classified into a "sleeve bearing" and a ball bearing when applied to a motor. Although the oil-containing shaft t has a low unit price advantage, its short life and poor precision, and the ball shaft ♦ 7 Although (four) degree south 'but its high cost and poor impact resistance, noise, and the upper speed oil bearing and ball bearing due to the contact between the shaft and the inner wall of the bearing, resulting in vibration, noise and life of the ^ shaft motor, and dynamic pressure Bearings have the advantages of low noise, high precision, long life and impact resistance. Therefore, the use of dynamic pressure bearings for spindle motors has gradually become mainstream. The principle of the above-mentioned dynamic pressure bearing utilizes the flow characteristic of the fine groove to promote the effect of filling the lubricating fluid in the gap between the main shaft and the bearing to achieve sufficient lubrication and pressure build-up, in order to preserve the lubricating fluid in the bearing gap, . The surface of the sea bearing is engraved with a herringbone groove, except for the 5 18613 1288997 « _ can increase the fluid pressure when the spindle is rotated, and the lubricating fluid can be reached inside the bearing gap. A leak-proof function, such as U.S. Patent No. 6,364, 532 B1, discloses a dynamic pressure bearing mechanism in which a set of herringbone grooves are engraved on the inner surface of the bearing or the shaft diameter of the main shaft, but the spindle is miniaturized After that, the south pole of the spindle motor to the socket is less than $4, 4mm, and the pressure build effect during the operation of the dynamic pressure bearing is too small to overcome the motor rotor due to manufacturing and assembly eccentricity. Lu's own unbalanced amount, so that the main shaft is in contact with the bearing, so the superior characteristics of the dynamic pressure bearing cannot be exerted. SUMMARY OF THE INVENTION The main purpose of the present invention is to provide a seven- and t-reacting dynamic pressure bearing, which is the first movement between the sleeve and the bearing shaft by the sleeve (single 7L and the first movement) The pressure-increasing effect of the pressing unit can make the motor have better stability when rotating, and the dynamic yaw value is better. A further object of the present invention is to provide a spindle motor having the dynamic pressure bearing, which is the first dynamic pressure unit and the second dynamic pressure unit, and the pressure-building function of the dynamic pressure bearing is increased to overcome the miniaturization of the motor. The phenomenon of insufficient pressure build-up of dynamic pressure bearings. In order to achieve the above object, the present invention provides a dynamic pressure bearing for a shaft: a 妾-rotor unit, and the rotor unit includes a socket and a rotating shaft, and the rotating shaft is placed in a shaft hole of the sleeve, The socket is sleeved on the outer wall of the sleeve, and the sleeve is disposed by the sleeve of the sleeve. The bottom of the sleeve is provided with an end surface and the movable portion is repeatedly grooved to guide the rotating shaft. The shaft hole and the rotating shaft have a -f-f connection, and a lubricating fluid 18613 6 1288997 is enclosed in the shaft hole or the rotating shaft, and the inner dynamic pressure groove is The first spacing forms a first dynamic pressure unit, and the outer wall and the socket have a second spacing, and the outer wall or the socket is engraved with an external dynamic pressure groove, and the outer dynamic pressure groove is injected. There is a run: the bone fluid ' forms a second dynamic pressure by the external dynamic pressure groove and the second distance. The above-mentioned shaft and sleeve may also have a conical shape, so that they have the functions of a radial bearing and an axial thrust bearing at the same time, so that the thrust member can be omitted, the manufacturing flexibility and the component cost can be increased. In addition, the present invention provides a spindle motor having the movable (four) bearing, which is driven by: early: f, a dice, 70', supported by the stator unit and with a force of 4 early rotation, the rotor The unit comprises at least one socket, two disc holding members, a stop sliding piece, a magnet and an iron, and the second and the wide including at least one core winding assembly, the bottom plate and the dynamic pressure shaft y (four) bearing are a shaft hole of the sleeve accommodating the rotating shaft, and the outer wall of the sleeve is sleeved with the socket, and the inner dynamic pressure groove on the rotating shaft and the first spacing are between the shaft hole and the rotating shaft, by the outer wall or The seat is moving outside::;! The second brother formed the second unit. Bu-red groove and _ two-pitch dynamic pressure bearing of the present invention and by the above-mentioned unit, the first; the first; the second; the: the system is used, when the shaft is in the process of rotation, the two axes = And the fluid pressure of the first-moving rhinoceros---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- The value of the pressure of the fluid pressure of the second dynamic pressure unit is 5 5 佴up into the U i 5 times of the fluid i knife of the 5 dynasty dynamic pressure unit, which will stabilize the operation of the rotation, thereby overcoming the = knot Positive, thus achieving the phenomenon of insufficient motor pressure. A specific example of a moving bearing that overcomes the miniaturization of the motor and an embodiment of the present invention is described in the specification of a spindle motor of the movable bearing of the present invention. Those skilled in the art can disclose the present disclosure. The content is light and effective. The present invention can also be implemented by using the other ones of the "Yuyue Miaotian" of the ^ month, and the specific examples of his indecent use. "The details in the book can also be based on different viewpoints and applications. In the spirit of the present invention, various trimming disc changes are performed. The surface is the first embodiment of the dynamic pressure bearing of the present invention; the figure shows: the dynamic pressure bearing shaft-rotor unit 丨〇, 广子早兀1 Included with a bearing flange m-axis 12, the turn π is too arrogant. ^ 2i outside the tube 21 of the shaft hole 213, the sleeve = outer = set the bearing flange ln, and borrow The sleeve is disposed by a sleeve (2), and the thrust member A having a dynamic pressure groove is disposed at the bottom of the sleeve 21 to cut the rotating shaft 12, and the bearing flange lu_ is disposed on the rotating shaft a Forming a rotating member 'The bearing n and the bearing flange iu can be integrally formed ' or divided into two components and then riveted, tightly fitted, locked and joined, etc. (as shown in the figure) to increase the production Elasticity: The above-mentioned shaft hole 2] 3 and the rotating shaft 12 have a first spacing of -1 " to 5", and the axial hole M3, - has an internal dynamic pressure groove 211 (as shown in Fig. 3A) Show), The inner dynamic pressure groove 2 卫 'main lubricating fluid' is formed by the inner dynamic pressure groove 211 and the first spacing 18613 8 1288997
一第一動壓單元30，而該外壁與該承座凸緣i 11之間具有 一介於1 // m至1 〇 # m的第二間距，且該外壁上具有外動壓 溝槽212(如第3B圖所示），該外動壓溝槽212注有潤滑流 體，藉由該外動壓溝槽212與該第二間距形成一第二動壓 單元40。該内動壓溝槽211除可刻於該軸孔213上外，亦 可刻於該轉軸12上，而該外動壓溝槽212，亦可刻在該承 座凸緣ill之内壁上，且該外動壓溝槽212除可一組的配 置外’亦可分為上、下兩組配置。 當該轉軸12與固定於該轉軸12上之承座凸緣iu轉 動蚪，上述第一動壓單元3〇與第二動壓單元4〇產生流體 建壓作用，由於為了製作與組裝設計上的考量，該第一間 距比該第二間距小，以確保該承座凸 =碰撞的現象。若當該轉轴12在嫩過= =斜時，而該第一動壓單元的流體壓力為ρι，該第二動 二=的流體塵力為F2,該大，且該F1與該 :=方向都為向左邊，使其具有加成作用，且該Μ 因而'查到=的G. 5倍以上，會將該轉軸12往左扶正， C ::運轉的目的’藉此當該動壓軸承應用於主轴 可克服馬達小型化所造成動屋轴承建屢不足之現 請參閱第4及第s闰 乂么丄々 主軸弓遠之判 立’’ τ、本叙明之具有該動壓軸承之 平由馬違之剖面不意圖及1 係包含-轉子單元1。及:定：：圖。如圖所示: 少包含一承座η、—#細二早兀20，該轉子單元10至 厂】轉轴12、一碟片夹持件13、一止滑 18613 9 Ϊ288997 1二;=:5::輛鐵16,藉由該定子單元2°支樓並 的動作，而該定子單元20則包含 車^、—鐵"繞線組件24、—底板Μ及上述之動壓 .套同21，糟由該套筒21 之軸孔213容置該轉軸12，兮矣μ 9 ·!々 n ^ 0 °亥套同21之外壁套設該承座 11，该軸孔2U與轉軸12之間呈 7 2n , a , 、+ +、、 <間具有一弟—間距，且該轴孔 上/、有一，主有潤滑流體之内叙㉟、婆4抵 以且之内動壓溝槽，該第一間距介 於l//m至5//m之間，μ出兮如去广从 » ,錯由该内動壓溝槽與該第一間距形 成一弟一動壓單元S Π，& # AI ^ 入私飞 早7"3()而心卜壁與該承座11之間具有一 "於1"至1〇綱第二間距， 滑流體之外動壓溝槽，藉 二“有潤 ,、 必外動壓溝槽212與該第- p弓 距形成一第二動壓單元40。 弟一間 n ^ , 3運4，先將該轉軸12置入該承座 11屋配，使其形成轉動元 从 η τ 立ϋ哀轉轴1 2之端面可兔：!：击 面狀或圓錐狀，該端面可呈 t ^ , 、 /、有動昼溝槽，再將該承座1 1 |興遠輛鐵1 6鉚合，接著將兮虚 ㈣，…一按者將该碟片夾持件13置入該承座^ 麼配亚將該磁鐵15置入哕鉍鈣〗β A 4 » # 豕輥鐵16與其膠合，即組奘& 成遠轉子單元1 〇，接著將 、、衣凡 香和该止推件22置入至該軸奎— 底部’且該止推件22之 “由套23之 β綠畆1 0 而面具有動壓溝槽，可用以支擋 该#轴1 2，再將該套筒21 1 牙 23與該底板25鉚人，^ 该轴套23屋配，且該轴套 23進行JT人女。 繞線組件24貝1J置入該軸套 23進仃知合，亦即裝完罕奮 旱兀10與該定子單元 才/知子 υ、、、〇 a，即誕裝完成主站民查 由該轉子單元10是恭衣兀珉王釉馬達，稭 ” f力光碟片之轉動，再藉由該定子 】〇 18613 1288997' 早兀2G支樓與帶動該轉子單元1()轉動的動作。 :請，6圖，係本發明之動壓軸承之第二實施態 ==，該第二實施態樣與第一實施態樣之結構大 == 隹其主要差異在於可將原用以容置該套筒21之軸 套同21 一體成型，亦即將一轉軸12設置於一套筒 21之轴孔213巾，並藉由一止推件22支撑，該套筒之 2=置於一承座U之承座凸緣111中，且該軸孔213 =外壁分別具有⑽墨溝槽及外動壓溝槽 〔溝槽與该軸孔213及該轉軸12間的第一間距形成一第一 元30’並藉由該外動壓溝槽與該外壁及該承座凸緣 I· 間距形成—第二動壓單元4G，該内㈣溝槽與該 外動壓溝槽皆注有潤滑流體。 一 請參閱第7圖及第8圖，係本發明之動壓轴承之 弟二&悲樣剖面*意圖及帛四實施態樣剖面*意圖。上 述第三四實施態樣之結構與第―、二實施態樣大致相同， 淮其主要差異在於上述之轉軸12及套筒21係均呈圓錐 狀，使其同時具備有徑向軸承與軸向止推抽承的功用，因 此可省略止推件，增加製作上之彈性及減少零件成本。 ^本發明之動壓軸承及具有該動壓軸承之主軸馬達係 ^由套筒之軸孔及外壁分別具有内、外動壓溝槽，且該套 筒分別與轉軸及承座之間具有第一間距及第二間距，藉由 該内動壓溝槽、該外動壓溝槽分別與該第一間距、該第二 ，距=成帛動壓單元及第二動壓單元，以提升動壓轴承 的建壓作用’且該第二動壓單元的流體壓力值可達該第一 18613 11 1288997* /動壓單元的流體壓力值的0.5倍以上，因 承應用於主軸馬達時，可券服民、告,別 /動壓轴 了克服馬達小型化所造成動壓轴 建壓不足之現象。另外，本發明之第_ 軸承 [早兀亦具有建壓加成的仙，因此，可使馬達達到 運轉的目的，且其動態偏擺值較佳。 〜 上述實施例僅例示性說明本發明之原理及其功效，而 非用於限制本發明。任何熟習此項技藝之人士均可^不違 =本發明之精神及範4下’對上述實施例進行修飾與改堤 =。因此，本發明之權利保護範圍，應如後述之申請專利 範圍所列。 【圖式簡單說明】 弟1圖係本發明之動壓轴承之第一實施態樣剖面示意 第2圖係本發明之承座及承座凸緣之剖面示意圖； 第3Α及3Β圖係本發明之套筒及其Α_Α線剖面示意圖； 第4圖係本發明之具有該動壓軸承之主軸馬達之剖面 不意圖； 第5圖係本發明之具有該動壓軸承之主軸馬達之立體 分解示意圖； 第6圖係本發明之動壓軸承之第二實施態樣剖面示意 圖； 第7圖係本發明之動壓軸承之第三實施態樣剖面示意 圖；以及 第8圖係本發明之動壓軸承之第四實施態樣剖面示意 12 18613 1288997’ 圖。 【主要元件符號說明】 10 轉子單元 11 承座 111 承座凸緣 12 轉軸 13 碟片挾持件 14 止滑片 15 磁鐵 16 軛鐵 20 定子單元 21 套筒 211 内動壓溝槽 212 外動壓溝槽 213 轴孔 22 止推件 23 軸套 24 鐵心繞線組件 25 底板 30 第一動壓單元 40 第二動壓單元a first dynamic pressure unit 30, and the outer wall and the socket flange i 11 have a second spacing of 1 // m to 1 〇 # m, and the outer wall has an outer dynamic pressure groove 212 ( As shown in FIG. 3B, the external dynamic pressure groove 212 is filled with a lubricating fluid, and the second dynamic pressure unit 40 is formed by the external dynamic pressure groove 212 and the second spacing. The inner dynamic pressure groove 211 can be engraved on the shaft hole 213, and can also be engraved on the rotating shaft 12, and the outer dynamic pressure groove 212 can also be engraved on the inner wall of the bearing flange ill. Moreover, the external dynamic pressure groove 212 can be divided into upper and lower two groups in addition to the configuration of one set. When the rotating shaft 12 and the bearing flange iu fixed on the rotating shaft 12 rotate, the first dynamic pressure unit 3 〇 and the second dynamic pressure unit 4 〇 generate a fluid pressure function, because of the design and assembly In consideration, the first pitch is smaller than the second pitch to ensure the phenomenon of the seat convex=collision. If the rotating shaft 12 is over-slope == oblique, and the fluid pressure of the first dynamic pressure unit is ρι, the second moving second=the fluid dust force is F2, which is large, and the F1 and the:= The direction is to the left, so that it has an additive effect, and the Μ thus 'checks G. 5 times or more, will turn the shaft 12 to the left, C:: the purpose of the operation 'by taking the dynamic axis The bearing can be used to overcome the miniaturization of the motor, and the housing of the moving house is insufficient. Please refer to the 4th and the s闰乂 丄々 丄々 丄々 丄々 丄々 丄々 丄々 τ τ 、 本 本 本 本 本 本 本 本 本 本 本 本 本 本The flat is not intended by the horse and the 1 series contains the rotor unit 1. And: set:: map. As shown in the figure: less than a seat η, - #细二早兀20, the rotor unit 10 to the factory] shaft 12, a disc holding member 13, a slip slip 18613 9 Ϊ 288997 1 2; =: 5: The iron 16 is operated by the 2° branch of the stator unit, and the stator unit 20 includes a vehicle, an iron "winding assembly 24, a bottom plate, and the above-mentioned dynamic pressure. 21, the shaft hole 213 of the sleeve 21 accommodates the rotating shaft 12, and the housing 11 is sleeved with the outer wall of the outer casing 21, and the shaft hole 2U and the rotating shaft 12 Between 7 2n , a , , + + , , < has a brother-spacing, and the shaft hole has /, there is a main lubricating fluid inside the 35, the Po 4 and the dynamic pressure groove The first pitch is between 1//m and 5//m, and the μ is removed from the », and the inner dynamic pressure groove and the first spacing form a dynamic pressure unit S, &# AI ^ Into the private flight early 7 " 3 () and the heart between the wall and the seat 11 has a " 1 " to 1 〇 second interval, the sliding fluid outside the dynamic pressure groove, borrow Second, there is a run, the outer dynamic pressure groove 212 and the first-p bow distance form a second dynamic pressure Yuan 40. The brother of a n ^, 3 transport 4, first put the shaft 12 into the seat 11 housing, so that it forms a rotating element from η τ ϋ ϋ ϋ 轴 1 1 1 可 可 : : : In the shape of a face or a cone, the end face can be t ^ , /, with a movable groove, and then the seat 1 1 | Xingyuan iron 16 6 riveted, and then the virtual (four), ... a button will The disc holding member 13 is placed in the holder, and the magnet 15 is placed in the calcium 〗β A 4 »# 豕roll iron 16 and glued thereto, that is, the group 奘 & Then, the yifanxiang and the thrust member 22 are placed into the axis 底部-bottom' and the thrust member 22 has a dynamic pressure groove from the β green 畆 10 of the sleeve 23, which can be used to support The #axis 1 2 is blocked, and the sleeve 21 1 tooth 23 is riveted to the bottom plate 25, and the sleeve 23 is housed, and the sleeve 23 is JT. The winding assembly 24B 1J is placed in the sleeve 23 to enter the 仃 仃, that is, the 奋 兀 与 与 与 与 与 与 与 与 与 与 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知 知The rotor unit 10 is a Gongyi enamel glaze motor, the rotation of the straw "f force disc", and then by the stator 〇 18613 1288997' early 2G branch and the rotation of the rotor unit 1 (). Figure 6 is a second embodiment of the dynamic pressure bearing of the present invention ==, the structure of the second embodiment is larger than the structure of the first embodiment == 隹 The main difference is that the original can be used to accommodate the set The sleeve of the cylinder 21 is integrally formed with the 21, that is, a shaft 12 is disposed on the shaft hole 213 of a sleeve 21, and is supported by a thrust member 22, which is placed in a socket U. In the bearing flange 111, the shaft hole 213=the outer wall respectively has (10) an ink groove and an outer dynamic pressure groove. The first spacing between the groove and the shaft hole 213 and the rotating shaft 12 forms a first element 30'. And the second dynamic pressure unit 4G is formed by the outer dynamic pressure groove and the outer wall and the socket flange I·, and the inner (four) groove and the outer dynamic pressure groove are filled with lubricating fluid Please refer to Fig. 7 and Fig. 8 for the structure of the second and fourth embodiment of the dynamic pressure bearing of the present invention and the intention of the fourth embodiment. The two implementations are roughly the same. The main difference is that the above-mentioned shaft 12 and sleeve 21 are both conical, so that they have the functions of radial bearing and axial thrust pumping, so they can be omitted. Pushing the member, increasing the flexibility of the manufacturing and reducing the cost of the part. The dynamic pressure bearing of the present invention and the spindle motor having the dynamic pressure bearing have inner and outer dynamic pressure grooves respectively from the shaft hole and the outer wall of the sleeve, and The sleeve has a first spacing and a second spacing between the rotating shaft and the socket, respectively, wherein the inner dynamic pressure groove and the outer dynamic pressure groove are respectively separated from the first spacing, the second spacing, and the distance The dynamic pressure unit and the second dynamic pressure unit are used to raise the pressure forming function of the dynamic pressure bearing' and the fluid pressure value of the second dynamic pressure unit can reach 0.5 of the fluid pressure value of the first 18613 11 1288997* / dynamic pressure unit More than double, when it is applied to the spindle motor, it can be used for vouchers, sue, no / The pressure shaft overcomes the phenomenon that the dynamic pressure shaft is insufficiently built to overcome the miniaturization of the motor. In addition, the first bearing of the present invention [has a good pressure build-up, so that the motor can be operated, and The dynamic yaw value is preferred. The above-described embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone skilled in the art can omit the spirit and scope of the present invention. 4, 'Modify and modify the above-mentioned embodiment'. Therefore, the scope of protection of the present invention should be as listed in the scope of the patent application described later. [Simple description of the drawing] The brother 1 is the dynamic pressure bearing of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a schematic cross-sectional view of a socket and a socket flange of the present invention; FIGS. 3 and 3 are a schematic view of a sleeve of the present invention and a Α_Α line thereof; and FIG. 4 is a view of the present invention. The cross-sectional view of the spindle motor having the dynamic pressure bearing is not intended; FIG. 5 is a perspective exploded view of the spindle motor having the dynamic pressure bearing of the present invention; and FIG. 6 is a second embodiment of the dynamic pressure bearing of the present invention. schematic diagram FIG 7 based on the third embodiment of the present invention the movable bearing-like cross-sectional schematic view of the state; and FIG. 8 according to the present invention based dynamic pressure bearing of the fourth embodiment aspect of a schematic cross-sectional view 12186131288997 'in FIG. [Main component symbol description] 10 Rotor unit 11 Seat 111 Seat flange 12 Rotary shaft 13 Disc holder 14 Stop slide 15 Magnet 16 Yoke 20 Stator unit 21 Sleeve 211 Internal dynamic pressure groove 212 External dynamic pressure groove Slot 213 Shaft hole 22 Thruster 23 Bushing 24 Core winding assembly 25 Base plate 30 First dynamic pressure unit 40 Second dynamic pressure unit