TWI608169B - Dynamic bearing structure and cooling fan employing the dynamic bearing structure and the assembly method of the same - Google Patents
Dynamic bearing structure and cooling fan employing the dynamic bearing structure and the assembly method of the same Download PDFInfo
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本發明為一種適合用於散熱風扇系統使用的動壓軸承及使用動壓軸承的風扇結構及其組裝方法。 The invention relates to a dynamic pressure bearing suitable for use in a cooling fan system and a fan structure using the dynamic pressure bearing and an assembling method thereof.
按,散熱風扇係為散熱模組中主要組件之一。而近年來為配合筆記型電腦、平板電腦等資訊產品不斷朝向小型化、薄形化且處理器操作功率不斷提升的趨勢,使得散熱模組也必須隨著朝向小型化、薄形化且同時要兼顧散熱效率提升的方向發展。因此使得散熱模組採用的風扇,也必須要縮小體積、減少厚度、同時又要提升風扇轉速。為了因應風扇微型化、薄型化且高轉速的需求,目前相當多的散熱風扇已經改採動壓軸承的設計取代傳統的軸承。 Press, the cooling fan is one of the main components in the cooling module. In recent years, in order to cope with the trend of miniaturization, thinning, and increasing processor operating power for information products such as notebook computers and tablet computers, the heat dissipation module must also be miniaturized, thinned, and simultaneously Taking into account the direction of heat efficiency improvement. Therefore, the fan used in the heat dissipation module must also reduce the volume, reduce the thickness, and at the same time increase the fan speed. In order to meet the demand for miniaturization, thinning and high speed of fans, a considerable number of cooling fans have been replaced by conventional dynamic bearings.
如圖10所示,係為一種習用的使用動壓軸承的風扇結構,其中包括:一風扇外殼1;一軸承裝置2,係設置於所述散熱器外殼1的底板1a之上;一風扇葉片3,所述風扇葉片3係設置於一個軸承裝置2的轉軸6的上端。風扇葉片3上進一步設置有一個轉子4,及於風扇外殼1的底板上設置有一定子5,藉由轉子4與定子5相互配合,可產生互斥的磁場推動風扇葉片3產生以轉軸6為中心的旋轉。如圖10所示,所述習知技術的軸承裝置2包括有:一軸套7、一個設置於軸套7之中的動壓軸承8、以及一個貫穿設 置於動壓軸承8內的轉軸6。 As shown in FIG. 10, it is a conventional fan structure using a dynamic pressure bearing, which comprises: a fan casing 1; a bearing device 2 is disposed on the bottom plate 1a of the radiator casing 1; a fan blade 3. The fan blade 3 is disposed at an upper end of the rotating shaft 6 of a bearing device 2. A fan 4 is further disposed on the fan blade 3, and a stator 5 is disposed on the bottom plate of the fan casing 1. The rotor 4 and the stator 5 cooperate to generate a mutually exclusive magnetic field to drive the fan blade 3 to be generated by the rotating shaft 6 The rotation of the center. As shown in FIG. 10, the bearing device 2 of the prior art includes: a bushing 7, a dynamic pressure bearing 8 disposed in the bushing 7, and a through-set A rotating shaft 6 placed in the dynamic pressure bearing 8.
其中動壓軸承8是套設在軸套7的內部,並利用一壓環8a將動壓軸承8a固定在軸套7內部,再藉由軸套7固定於風扇外殼1的底板1a上。軸套7的底部具有一封閉的底板7a,底板7a與動壓軸承8的底面間保持一間距,以形成一儲油室9,且於該儲油室9內填充有潤滑油脂。 The dynamic pressure bearing 8 is sleeved inside the sleeve 7, and the dynamic pressure bearing 8a is fixed inside the sleeve 7 by a pressure ring 8a, and is fixed to the bottom plate 1a of the fan casing 1 by the sleeve 7. The bottom of the sleeve 7 has a closed bottom plate 7a. The bottom plate 7a and the bottom surface of the dynamic pressure bearing 8 are spaced apart to form an oil storage chamber 9, and the oil storage chamber 9 is filled with lubricating grease.
當風扇運轉時,轉軸6旋轉將潤滑油脂帶動進入到動壓軸承8的轉軸孔與轉軸之間的間隙中。動壓軸承8的轉軸孔的內側壁設有多數的導油槽,藉由導油槽的導引作用,使得潤滑油脂於轉軸孔的表面流動並集中形成壓力,因此形成一介於轉軸孔與轉軸6表面之間的具有壓力的油膜,藉由油膜的支撐力量,使得轉軸6旋轉時不會接觸轉軸孔,並且減少其摩擦力。 When the fan is running, the rotation of the rotating shaft 6 drives the lubricating grease into the gap between the rotating shaft hole of the dynamic pressure bearing 8 and the rotating shaft. The inner side wall of the rotating shaft hole of the dynamic pressure bearing 8 is provided with a plurality of oil guiding grooves. The guiding action of the oil guiding groove causes the lubricating grease to flow on the surface of the rotating shaft hole and concentrates to form a pressure, thereby forming a surface between the rotating shaft hole and the rotating shaft 6. The oil film with pressure between the oil film, by the supporting force of the oil film, makes the rotating shaft 6 not touch the rotating shaft hole when rotating, and reduces the frictional force.
習用的動壓軸承結構中,其動壓軸承8是透過軸套7轉接固定於風扇外殼1的底板1a上,同時動壓軸承8底部的儲油室9是成型在軸套7上,因此使得所述的軸套7成為習用的動壓軸承結構中一項不可或缺的元件。然而該種習用的動壓軸承結構卻存在有下列缺點: In the conventional dynamic pressure bearing structure, the dynamic pressure bearing 8 is rotatably fixed to the bottom plate 1a of the fan casing 1 through the sleeve 7, and the oil reservoir 9 at the bottom of the dynamic pressure bearing 8 is formed on the sleeve 7, so The bushing 7 is made an indispensable component in the conventional dynamic pressure bearing structure. However, this conventional dynamic pressure bearing structure has the following disadvantages:
1、由於動壓軸承8必須套設在軸套7的內部,並且需要進一步設置用以將動壓軸承壓固在軸套內的壓環8a,因此將使得零件數量增加,並提高成本。 1. Since the dynamic pressure bearing 8 must be sleeved inside the sleeve 7, and the pressure ring 8a for pressing the dynamic pressure bearing in the sleeve needs to be further provided, the number of parts is increased and the cost is increased.
2、動壓軸承8必須套設在軸套7的內部,使得動壓軸承8的直徑必須縮減,也連帶使得動壓軸承的轉軸孔以及轉軸6的直徑也必須縮減,因此使得習用的動壓軸承的轉軸孔與轉軸6的直徑受到限制,而使其轉軸6與轉軸孔之間的油膜承載面積縮減,影響到其運轉穩定性。 2. The dynamic pressure bearing 8 must be sleeved inside the sleeve 7, so that the diameter of the dynamic pressure bearing 8 must be reduced, and the diameter of the shaft of the dynamic pressure bearing and the diameter of the rotating shaft 6 must also be reduced, thus making the conventional dynamic pressure shaft The diameter of the rotating shaft hole and the rotating shaft 6 is limited, and the oil film bearing area between the rotating shaft 6 and the rotating shaft hole is reduced, which affects the running stability.
3、動壓軸承8先套合於軸套7內部再經由軸套7固定在底板1a上,因此會產生雙重的配合公差使得動壓軸承8的轉軸孔的中心軸線容易歪斜,以致於轉軸6及風扇葉片3的旋轉軸心 偏斜,導致運轉的震動及噪音。 3. The dynamic pressure bearing 8 is firstly fitted inside the sleeve 7 and then fixed to the bottom plate 1a via the sleeve 7, so that a double fitting tolerance is generated, so that the central axis of the rotating shaft hole of the dynamic pressure bearing 8 is easily skewed, so that the rotating shaft 6 And the axis of rotation of the fan blade 3 Skewed, causing vibration and noise during operation.
4、習用的動壓軸承是利用壓環8a將動壓軸承8固定在軸套7內部。然而如果用以迫緊動壓軸承8的壓環8a鬆脫或沒有確實緊固,將使得動壓軸承8與軸套7產生相對旋轉。 4. The conventional dynamic pressure bearing uses the pressure ring 8a to fix the dynamic pressure bearing 8 inside the sleeve 7. However, if the pressure ring 8a for pressing the dynamic pressure bearing 8 is loose or not securely fastened, the dynamic pressure bearing 8 and the sleeve 7 will be relatively rotated.
5、習用的動壓軸承8被套合在軸套7的內部,然而目前因為散熱風扇微型化的結果,動壓軸承8的尺寸也相當細小,其只要稍一受到軸套7壓迫,便可能使得動壓軸承8的轉軸孔的尺寸或真圓度受到影響,如此將使得動壓軸承8的轉軸孔與轉軸6之間的間隙尺寸產生誤差或者是間隙不均的情形,將導致油膜無法建立,以致於轉軸容易磨損情形產生。 5. The conventional dynamic pressure bearing 8 is fitted inside the sleeve 7, but at present, the size of the dynamic pressure bearing 8 is also relatively small as a result of miniaturization of the cooling fan, which may be caused by a slight compression of the sleeve 7. The size or roundness of the shaft hole of the dynamic pressure bearing 8 is affected, so that the gap size between the shaft hole of the dynamic pressure bearing 8 and the rotating shaft 6 may be inaccurate or the gap may be uneven, which may result in the oil film not being established. As a result, the shaft is easily worn.
6、此外習用的動壓軸承結構中的導油溝槽的成型方法多數為利用蝕刻方式,或模塑成型方式於動壓軸承的轉軸孔內側壁形成所述的導油溝槽,然而習用的製造方法中,都無法精確控制導油溝槽的尺寸及深度的精密度,因此使得動壓軸承無法有效建立起油膜。 6. In addition, the molding method of the oil guiding groove in the conventional dynamic pressure bearing structure is mostly formed by an etching method or a molding method on the inner side wall of the rotating shaft hole of the dynamic pressure bearing, but the conventional oil guiding groove is used. In the manufacturing method, the precision of the size and depth of the oil guiding groove cannot be precisely controlled, so that the dynamic pressure bearing cannot effectively establish the oil film.
由於以上因素,使得習用的散熱風扇用的動壓軸承結構存有相當多缺點,故,如何藉由結構設計的改良,來提升散熱風扇用的動壓軸承結構運轉穩定性,來克服上述的缺失,已成為所述項事業所欲解決的重要課題之一。 Due to the above factors, there are quite a few disadvantages in the dynamic pressure bearing structure for the conventional cooling fan. Therefore, how to improve the operational stability of the dynamic pressure bearing structure for the cooling fan by the improvement of the structural design to overcome the above-mentioned deficiency It has become one of the important topics to be solved by the above-mentioned businesses.
本發明主要目的在提供一種可以簡化構造,增加動壓軸承運轉穩定性的動壓軸承以及使用所述軸承之風扇結構及其軸承定位方法。 SUMMARY OF THE INVENTION A primary object of the present invention is to provide a dynamic pressure bearing which can simplify the construction and increase the operational stability of a dynamic pressure bearing, and a fan structure using the same and a bearing positioning method thereof.
其中所述動壓軸承包括:一軸承本體、一設於軸承本體底端的軸承固定部、一設於軸承固定部的儲油室、一底蓋及一轉軸。 The dynamic pressure bearing comprises: a bearing body, a bearing fixing portion disposed at a bottom end of the bearing body, an oil storage chamber disposed at the bearing fixing portion, a bottom cover and a rotating shaft.
其中軸承本體的中心具有一貫穿過軸承本體的轉軸孔,且於轉軸孔的內側壁面設有多個導油溝槽。在較佳實施例中,轉軸孔內壁面的導油溝槽可為人字形溝槽。所述軸承固定部一體成型地 連接於軸承本體的底端,軸承固定部具有一環繞於所述軸承固定部的側面的接合面,所述接合面與一固定座接合,使得所述軸承固定部固定於所述固定座上。所述儲油室連通於所述轉軸孔的底端且直徑大於所述轉軸孔,其底部設有一開口,且所述底蓋蓋合於所述開口處,以將儲油室封閉。所述轉軸貫穿設置於轉軸孔內,且轉軸的底端抵靠於所述底蓋的頂面。 The center of the bearing body has a shaft hole that passes through the bearing body consistently, and a plurality of oil guiding grooves are disposed on the inner wall surface of the shaft hole. In a preferred embodiment, the oil guiding groove on the inner wall surface of the shaft hole may be a herringbone groove. The bearing fixing portion is integrally formed Attached to the bottom end of the bearing body, the bearing fixing portion has a joint surface surrounding the side of the bearing fixing portion, and the joint surface is engaged with a fixing seat such that the bearing fixing portion is fixed to the fixing seat. The oil storage chamber is connected to the bottom end of the shaft hole and has a diameter larger than the shaft hole. The bottom portion is provided with an opening, and the bottom cover is closed at the opening to close the oil storage chamber. The rotating shaft is disposed in the rotating shaft hole, and the bottom end of the rotating shaft abuts against the top surface of the bottom cover.
其中,所述儲油室內填充有潤滑油脂,當所述轉軸旋轉時,所述潤滑油脂進入所述轉軸與所述轉軸孔之間的間隙中,並藉由所述導油溝槽引導所述潤滑油脂流動並產生壓力,以形成介於所述轉軸表面與所述轉軸孔之間的油層。 Wherein the oil storage chamber is filled with lubricating grease, and when the rotating shaft rotates, the lubricating grease enters a gap between the rotating shaft and the rotating shaft hole, and the oil guiding groove guides the Lubricating grease flows and generates pressure to form an oil layer between the surface of the rotating shaft and the shaft of the rotating shaft.
本發明較佳實施例中,其中所述儲油室具有一頂面部分及一環繞於所述頂面部分的側壁部分,所述底蓋容置於所述側壁部分的內緣,所述底蓋的頂面具有一向上突起的凸緣,所述凸緣的頂緣接觸於所述儲油室的所述頂面部分。 In a preferred embodiment of the present invention, the oil storage chamber has a top surface portion and a side wall portion surrounding the top surface portion, and the bottom cover is received at an inner edge of the side wall portion, the bottom portion The top mask of the cover has an upwardly projecting flange, the top edge of the flange contacting the top surface portion of the oil reservoir.
本發明較佳實施例中,所述凸緣部分的頂緣和所述儲油室的頂面部分之間具有一微小間隙,且於所述底板的一側邊設有一缺口部,所述儲油室內的氣體依序經過所述微小間隙及所述缺口部,以流通到所述儲油室的外部。同時所述凸緣和所述頂面部分塗佈有撥油劑,使得所述凸緣和所述頂面部分之間的所述微小間隙僅供所述氣體通過而阻止所述儲油室內所儲存的所述潤滑油脂通過。 In a preferred embodiment of the present invention, a small gap is formed between a top edge of the flange portion and a top surface portion of the oil storage chamber, and a notch portion is disposed on one side of the bottom plate. The gas in the oil chamber sequentially passes through the minute gap and the notch portion to flow to the outside of the oil storage chamber. At the same time, the flange and the top surface portion are coated with an oil-repellent agent such that the minute gap between the flange and the top surface portion is only for the passage of the gas to prevent the oil storage chamber from being The stored lubricating grease passes.
本發明較佳實施例中,其中多個所述導油溝槽是利用一成型刀具的車削成型刀刃於所述轉軸孔的內側壁面進行車削所形成,每一個所述導油溝槽的兩端分別具有一入刀口及一出刀口,以供所述車削成型刀具的所述車削成型刀刃進入及退出所述導油溝槽。 In a preferred embodiment of the present invention, a plurality of the oil guiding grooves are formed by turning a cutting blade of a forming tool on an inner wall surface of the rotating shaft hole, and both ends of each of the oil guiding grooves are formed. There is a cutting edge and a cutting edge respectively for the turning forming blade of the turning forming tool to enter and exit the oil guiding groove.
本發明較佳實施例中,其中底蓋的頂面可設有一耐磨片,或者所述底蓋為採用耐磨材料製成的耐磨底蓋。 In a preferred embodiment of the present invention, the top surface of the bottom cover may be provided with a wear-resistant sheet, or the bottom cover may be a wear-resistant bottom cover made of a wear-resistant material.
本發明又提供一種採用上述動壓軸承的風扇結構,其中所述風扇結構主要包括一底板,一風扇葉片、一轉子、一定子,及一動壓軸承總成。其中動壓軸承總成具有一軸承本體、一設於軸承本體底端的軸承固定部、一設於軸承固定部的儲油室、一底蓋及一轉軸。其中軸承本體的中心具有一貫穿過軸承本體的轉軸孔,且於轉軸孔的內側壁面設有多個導油溝槽。在較佳實施例中,轉軸孔內壁面的導油溝槽可為人字形溝槽。所述軸承固定部一體成型地連接於軸承本體的底端,軸承固定部具有一環繞於所述軸承固定部的側面的接合面,所述接合面與一設於所述底板上固定座接合,使得所述軸承固定部固定於所述固定座上。所述儲油室連通於所述轉軸孔的底端且其底部設有一開口,所述底蓋蓋合於所述開口處,以將儲油室封閉。所述轉軸貫穿設置於轉軸孔內,且抵靠於所述底蓋的頂面。 The invention further provides a fan structure using the above dynamic pressure bearing, wherein the fan structure mainly comprises a bottom plate, a fan blade, a rotor, a stator, and a dynamic pressure bearing assembly. The dynamic pressure bearing assembly has a bearing body, a bearing fixing portion disposed at a bottom end of the bearing body, an oil storage chamber disposed at the bearing fixing portion, a bottom cover and a rotating shaft. The center of the bearing body has a shaft hole that passes through the bearing body consistently, and a plurality of oil guiding grooves are disposed on the inner wall surface of the shaft hole. In a preferred embodiment, the oil guiding groove on the inner wall surface of the shaft hole may be a herringbone groove. The bearing fixing portion is integrally connected to the bottom end of the bearing body, and the bearing fixing portion has a joint surface surrounding the side of the bearing fixing portion, and the joint surface is engaged with a fixing seat provided on the bottom plate. The bearing fixing portion is fixed to the fixing seat. The oil storage chamber is connected to the bottom end of the shaft hole and has an opening at the bottom thereof. The bottom cover covers the opening to close the oil storage chamber. The rotating shaft is disposed in the shaft hole and abuts against the top surface of the bottom cover.
所述風扇葉片固定於所述轉軸的頂面,所述定子固定設置於所述軸承本體的外側,所述轉子設置於所述風扇葉片的內側面,且環繞於所述定子的外側。 The fan blade is fixed on a top surface of the rotating shaft, the stator is fixedly disposed on an outer side of the bearing body, and the rotor is disposed on an inner side surface of the fan blade and surrounds an outer side of the stator.
藉由所述轉子與定子產生互斥的磁場可使所述風扇葉片及所述轉軸產生旋轉,且藉由轉子與定子之磁力相互吸引,使所述轉軸保持套合於所述軸承本體的轉軸孔內。 And generating a mutually exclusive magnetic field by the rotor and the stator to rotate the fan blade and the rotating shaft, and attracting the rotating shaft to the rotating shaft of the bearing body by attracting magnetic force between the rotor and the stator Inside the hole.
本發明更進一步提供一種所述使用動壓軸承之風扇結構的組裝方法,係包括下列步驟:一軸承組裝步驟,係將所述底蓋裝置於所述軸承本體的底部的儲油室中,並將所述軸承本體以壓配合方式裝置於所述底板的固定座。一定子組裝步驟,係將所述定子組裝於所述底板或所述軸承本體上。一轉子組裝步驟,係將所述轉子組裝於所述風扇葉片之上。一風扇組裝步驟,係將所述所述風扇葉片組裝於所述轉軸頂端。一注油步驟,係將潤滑油脂從軸承本體的轉軸孔注入所述儲油室內。及一組裝步驟,係將已組裝有所述風扇葉片的所述轉軸***到所述軸承本體的所述轉軸孔 內,並藉由所述轉子與所述定子彼此間的磁力相互吸引將所述轉軸連同風扇葉片固定於所述軸承本體上。 The present invention further provides a method for assembling a fan structure using the dynamic pressure bearing, comprising the steps of: a bearing assembly step of installing the bottom cover in an oil storage chamber at a bottom of the bearing body, and The bearing body is press-fitted to the fixing seat of the bottom plate. The stator assembly step is to assemble the stator on the bottom plate or the bearing body. A rotor assembly step of assembling the rotor over the fan blades. A fan assembly step is to assemble the fan blade to the top end of the rotating shaft. In the oil filling step, the lubricating grease is injected into the oil storage chamber from the shaft hole of the bearing body. And an assembling step of inserting the rotating shaft assembled with the fan blade into the rotating shaft hole of the bearing body And rotating the rotating shaft together with the fan blade on the bearing body by mutually attracting magnetic force between the rotor and the stator.
本發明的主要功效,在於: The main effects of the present invention are:
1、本發明的風扇結構使用的動壓軸承總成中,軸承本體與軸承固定部一體成型,同時又直接將儲油室一體成型於軸承本體的底端,因此使得軸承本體不需使用軸套,因此使得轉軸孔及轉軸直徑可以加大,而使得轉軸具有較大的油膜承載面積,而提高其運轉穩定性,並減少偏擺。 1. In the dynamic pressure bearing assembly used in the fan structure of the present invention, the bearing body and the bearing fixing portion are integrally formed, and at the same time, the oil storage chamber is integrally formed on the bottom end of the bearing body, so that the bearing body does not need to use the sleeve Therefore, the diameter of the shaft hole and the rotating shaft can be increased, and the rotating shaft has a large oil film bearing area, thereby improving the running stability and reducing the yaw.
2、由於軸承本體直接安裝於底板的固定座上,可直接將軸承本體安裝在底板的定位上,由於省除了軸套的定位誤差,使得軸承本體以及轉軸孔的定位可以更加精確,而能夠避免轉軸中心偏斜的情形產生,因此可有效降低轉軸偏斜所造成的風扇運轉震動與噪音的情形。 2. Since the bearing body is directly mounted on the fixing seat of the bottom plate, the bearing body can be directly mounted on the positioning of the bottom plate. Since the positioning error of the bushing is omitted, the positioning of the bearing body and the rotating shaft hole can be more precise, and can be avoided. The deflection of the center of the shaft occurs, so that the vibration and noise of the fan caused by the deflection of the shaft can be effectively reduced.
3、本發明的軸承本體外側未套合軸套,因此軸承本體不受軸套的壓迫,同時軸承本體設計成軸承固定部與固定座套合位置不與轉軸孔重疊,因此可避免軸承本體受壓迫造成轉軸孔尺寸偏差及真圓度變形的情形產生,因此可確保轉軸孔與轉軸間的間隙尺寸保持於標準範圍內,而能夠確保轉軸運轉時可以建立起油膜。 3. The outer side of the bearing body of the present invention does not fit the sleeve, so the bearing body is not pressed by the sleeve, and the bearing body is designed such that the bearing fixing portion and the fixing seat are not overlapped with the rotating shaft hole, thereby avoiding the bearing body being affected The pressure is caused by the dimensional deviation of the shaft hole and the deformation of the roundness. Therefore, the gap between the shaft hole and the shaft can be kept within the standard range, and the oil film can be established when the shaft is running.
4、本案採用以成型刀具車削方式成型導油溝槽,能夠精確控制每一個導油溝槽的形狀與路徑,因此能夠更有效地達到引導潤滑油脂流動以形成具有壓力的油膜的目的。 4. In this case, the oil guiding groove is formed by turning the forming tool, and the shape and path of each oil guiding groove can be precisely controlled, so that the purpose of guiding the lubricating grease flow to form the oil film with pressure can be more effectively achieved.
為使能更進一步瞭解本發明的特徵及技術內容,請參閱以下有關本發明的詳細說明與附圖,然而所附圖式僅提供參考與說明用,並非用來對本發明加以限制者。 For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.
1‧‧‧風扇殼體 1‧‧‧Fan housing
1a‧‧‧底板 1a‧‧‧floor
2‧‧‧軸承裝置 2‧‧‧ bearing device
3‧‧‧風扇葉片 3‧‧‧Fan blades
4‧‧‧轉子 4‧‧‧Rotor
5‧‧‧定子 5‧‧‧ Stator
6‧‧‧轉軸 6‧‧‧ shaft
7‧‧‧殼體 7‧‧‧Shell
7a‧‧‧底板 7a‧‧‧floor
8‧‧‧動壓軸承 8‧‧‧Dynamic bearing
8a‧‧‧壓環 8a‧‧‧pressure ring
9‧‧‧儲油室 9‧‧‧ oil storage room
10‧‧‧風扇結構 10‧‧‧Fan structure
11‧‧‧底板 11‧‧‧floor
12‧‧‧固定座 12‧‧‧ Fixed seat
13‧‧‧風扇葉片 13‧‧‧fan blades
14‧‧‧轉子 14‧‧‧Rotor
15‧‧‧定子 15‧‧‧ Stator
20‧‧‧動壓軸承總成 20‧‧‧Dynamic bearing assembly
21‧‧‧軸承本體 21‧‧‧ bearing body
22‧‧‧轉軸孔 22‧‧‧ shaft hole
23‧‧‧導油溝槽 23‧‧‧ Oil guide groove
231‧‧‧入刀口 231‧‧‧Into the knife
232‧‧‧出刀口 232‧‧‧Outlet
233‧‧‧隔離槽 233‧‧‧Isolation tank
24‧‧‧軸承固定部 24‧‧‧ bearing fixing department
241‧‧‧接合面 241‧‧‧ joint surface
25‧‧‧儲油室 25‧‧‧ oil storage room
251‧‧‧頂面部分 251‧‧‧ top part
252‧‧‧側壁部分 252‧‧‧ sidewall section
26‧‧‧底蓋 26‧‧‧ bottom cover
261‧‧‧凸緣 261‧‧‧Flange
262‧‧‧缺口部 262‧‧‧ gap
263‧‧‧耐磨墊 263‧‧‧ wear pad
30‧‧‧轉軸 30‧‧‧ shaft
40‧‧‧成型刀具 40‧‧‧Molding tools
41‧‧‧成型刀刃 41‧‧‧Forming blade
圖1為本發明動壓軸承及使用該動壓軸承風扇結構的組合剖面示意圖。 1 is a schematic cross-sectional view showing a dynamic pressure bearing of the present invention and a structure of a fan using the dynamic pressure bearing.
圖2為本發明的動壓軸承及使用該動壓軸承風扇結構的局部放大剖面圖。 Fig. 2 is a partially enlarged cross-sectional view showing the dynamic pressure bearing of the present invention and a structure of a fan using the dynamic pressure bearing.
圖3為本發明使用的動壓軸承本體的剖面圖。 Fig. 3 is a cross-sectional view showing the body of the dynamic pressure bearing used in the present invention.
圖4為本發明使用的底蓋的俯視圖。 Figure 4 is a top plan view of the bottom cover used in the present invention.
圖5為本發明使用的底蓋的側剖面圖。 Figure 5 is a side cross-sectional view of the bottom cover used in the present invention.
圖6為本發明的動壓軸承本體及底蓋另一變化實施例的組合剖面圖。 Figure 6 is a cross-sectional view showing a combination of another embodiment of the dynamic pressure bearing body and the bottom cover of the present invention.
圖7為本發明的動壓軸承本體的轉軸孔內壁之導油溝槽成型方法的示意圖。 Fig. 7 is a schematic view showing a method of forming an oil guiding groove on the inner wall of a rotating shaft hole of the dynamic pressure bearing main body of the present invention.
圖8為本發明第二實施例的動壓軸承及使用該動壓軸承的風扇結構的組合剖面示意圖。 Fig. 8 is a schematic cross-sectional view showing the structure of a dynamic pressure bearing and a fan structure using the same according to a second embodiment of the present invention.
圖9為本發明使用該動壓軸承的風扇結構的組裝程序流程圖。 Figure 9 is a flow chart showing the assembly procedure of the fan structure using the dynamic pressure bearing of the present invention.
圖10為習用的使用動壓軸承的風扇結構的組合剖面示意圖。 Fig. 10 is a schematic cross-sectional view showing a conventional fan structure using a dynamic pressure bearing.
本發明提供一種動壓軸承及使用所述動壓軸承的風扇結構,如圖1所示,為一個使用本發明之動壓軸承的風扇結構10的組合剖面圖,其中風扇結構10包括一底板11、一風扇葉片13、一轉子14、一定子15、及一動壓軸承總成20。 The present invention provides a dynamic pressure bearing and a fan structure using the dynamic pressure bearing, as shown in FIG. 1, is a combined sectional view of a fan structure 10 using the dynamic pressure bearing of the present invention, wherein the fan structure 10 includes a bottom plate 11 A fan blade 13, a rotor 14, a stator 15, and a dynamic pressure bearing assembly 20.
其中動壓軸承總成20安裝於底板11上的一個固定座12,所述風扇葉片13安裝於所述動壓軸承總成20的一個轉軸30的上端。所述定子15固定安裝於動壓軸承總成20的外側,所述轉子14安裝於風扇葉片13的內側,而且環繞於定子15的外側。所述轉子14與定子15可產生互斥的磁場而帶動風扇葉片13產生旋轉。 The dynamic pressure bearing assembly 20 is mounted on a fixed seat 12 on the bottom plate 11, and the fan blade 13 is mounted on an upper end of a rotating shaft 30 of the dynamic pressure bearing assembly 20. The stator 15 is fixedly mounted outside the dynamic pressure bearing assembly 20, and the rotor 14 is mounted on the inner side of the fan blade 13 and surrounds the outer side of the stator 15. The rotor 14 and the stator 15 can generate mutually exclusive magnetic fields to drive the fan blades 13 to rotate.
如圖2所示,本發明的動壓軸承總成20包括有:一軸承本體21、一轉軸30、一設於軸承本體21底端的軸承固定部24、一設於軸承固定部24底端的儲油室25、及一設於儲油室的開口處的底蓋26。 As shown in FIG. 2, the dynamic pressure bearing assembly 20 of the present invention comprises: a bearing body 21, a rotating shaft 30, a bearing fixing portion 24 disposed at the bottom end of the bearing body 21, and a storage provided at the bottom end of the bearing fixing portion 24. An oil chamber 25 and a bottom cover 26 disposed at an opening of the oil storage chamber.
如圖2所示,本發明的動壓軸承總成20其中軸承本體21為一個圓柱體,軸承本體21的中心具有一貫穿過軸承本體21的轉軸孔22,且於轉軸孔22的內側壁面設有多個導油溝槽23。在所述實施例中,轉軸孔22內壁面的導油溝槽23可為人字形溝槽。 As shown in FIG. 2, the dynamic pressure bearing assembly 20 of the present invention has a bearing body 21 which is a cylindrical body. The center of the bearing body 21 has a shaft hole 22 which is consistently passed through the bearing body 21, and is disposed on the inner wall surface of the shaft hole 22. There are a plurality of oil guiding grooves 23. In the embodiment, the oil guiding groove 23 on the inner wall surface of the shaft hole 22 may be a herringbone groove.
所述軸承固定部24一體成型地連接於軸承本體21的底端,軸承固定部24的側面環繞設有一接合面241,所述接合面241可與所述底板11的固定座12以壓配合方式接合,因此使得所述軸承本體21可透過所述軸承固定部24固定連接於固定座12上。 The bearing fixing portion 24 is integrally connected to the bottom end of the bearing body 21 , and a side of the bearing fixing portion 24 is surrounded by a joint surface 241 , and the joint surface 241 can be press-fitted with the fixing seat 12 of the bottom plate 11 . Engaging, so that the bearing body 21 can be fixedly coupled to the fixing seat 12 through the bearing fixing portion 24.
同時,本發明的軸承固定部24具有下列進一步特徵:所述軸承固定部24設置於軸承本體21的底端,同時所述軸承固定部24與底板11的固定座12接合的位置不與軸承本體21的轉軸孔22相互重疊,因此當軸承固定部24和固定座12以壓配合方式接合時,軸承固定部24受到固定座12擠壓而產生變形時,不會造成轉軸孔22的孔徑產生變化或使得轉軸孔22的真圓度遭受破壞,以避免轉軸30與轉軸孔22之間的間隙產生無法預期的變化,導致轉軸30旋轉時,無法於轉軸孔22與轉軸30間隙間建立油膜的情形產生。 Meanwhile, the bearing fixing portion 24 of the present invention has the further feature that the bearing fixing portion 24 is provided at the bottom end of the bearing body 21 while the position at which the bearing fixing portion 24 engages with the fixing seat 12 of the bottom plate 11 is not the same as the bearing body. The shaft holes 22 of 21 overlap each other, so that when the bearing fixing portion 24 and the fixing seat 12 are engaged in a press-fit manner, when the bearing fixing portion 24 is pressed by the fixing seat 12 to be deformed, the diameter of the shaft hole 22 does not change. Or the roundness of the shaft hole 22 is damaged to avoid an unpredictable change in the gap between the shaft 30 and the shaft hole 22, and the oil film cannot be formed between the shaft hole 22 and the shaft 30 when the shaft 30 rotates. produce.
同時,所述儲油室25設於軸承固定部24的底端,且與所述轉軸孔22的底端連通,且其直徑大於所述轉軸孔22。儲油室25底部設有一開口,且所述底蓋26蓋合於儲油室25的開口處,以將儲油室25封閉。所述轉軸30貫穿設置於轉軸孔22內,且轉軸30的底端抵靠於所述底蓋26的頂面。 At the same time, the oil storage chamber 25 is disposed at the bottom end of the bearing fixing portion 24 and communicates with the bottom end of the shaft hole 22, and has a larger diameter than the shaft hole 22. An opening is formed in the bottom of the oil storage chamber 25, and the bottom cover 26 is closed at the opening of the oil storage chamber 25 to close the oil storage chamber 25. The rotating shaft 30 is disposed through the rotating shaft hole 22 , and the bottom end of the rotating shaft 30 abuts against the top surface of the bottom cover 26 .
如圖2所示,轉軸30的頂端固定連接一轉動件,該實施例中,轉軸30頂端的轉動件為風扇葉片13,但如本創作的動壓軸承運用於其他裝置時(如:磁碟機、光碟機等),則該轉動件可為其他裝置的轉動機構。轉軸30的底端設置有一圓弧狀的端部,且在底蓋26的頂面設置有一利用耐磨材質製成的耐磨墊263,使得轉軸30的端部抵靠於底蓋26的頂面時可減少其摩擦力,並避免轉軸30 及底蓋26磨損。所述的底蓋26除了圖2所示的於頂面設置耐磨墊263以外,也可如圖6所示將底蓋26採用耐磨塑膠材料(如鐵氟龍、耐磨工程塑膠等材料)製成,使其本身便具有耐磨性。 As shown in FIG. 2, the top end of the rotating shaft 30 is fixedly coupled to a rotating member. In this embodiment, the rotating member at the top end of the rotating shaft 30 is a fan blade 13, but when the dynamic pressure bearing of the present invention is applied to other devices (eg, a disk) The machine, the optical disk drive, etc., the rotating member can be the rotating mechanism of other devices. The bottom end of the rotating shaft 30 is provided with an arc-shaped end portion, and a wear pad 263 made of a wear-resistant material is disposed on the top surface of the bottom cover 26 such that the end of the rotating shaft 30 abuts against the top of the bottom cover 26. Reduces friction when facing, and avoids shaft 30 And the bottom cover 26 is worn. The bottom cover 26 may be provided with a wear-resistant plastic material (such as Teflon, wear-resistant engineering plastics, etc.) in addition to the wear pad 263 disposed on the top surface as shown in FIG. Made to make it wear resistant.
所示儲油室25被底蓋26密封之後,可於其內部填充潤滑油脂。當所述轉軸旋轉時,儲油室25內的潤滑油脂進入轉軸30與轉軸孔22之間的間隙中,並藉由所述導油溝槽23引導潤滑油脂流動並產生壓力,以形成介於所述轉軸30表面與所述轉軸孔22之間的油層。由於此一油層具有壓力,因此可支撐轉軸30旋轉,使其旋轉時不接觸到轉軸孔22,以減少轉軸30與軸承本體21運轉的磨損。 After the illustrated oil reservoir 25 is sealed by the bottom cover 26, the inside of the oil reservoir 25 can be filled with lubricating grease. When the rotating shaft rotates, the lubricating grease in the oil storage chamber 25 enters the gap between the rotating shaft 30 and the rotating shaft hole 22, and guides the lubricating grease flow and generates pressure by the oil guiding groove 23 to form a gap therebetween. An oil layer between the surface of the rotating shaft 30 and the rotating shaft hole 22. Since the oil layer has pressure, the rotation of the rotating shaft 30 can be supported so as not to contact the rotating shaft hole 22 when rotating, so as to reduce the wear of the rotating shaft 30 and the bearing body 21.
如圖2所示,其中所述儲油室25為設置在軸承固定部24底面的圓形凹孔,其具有一頂面部分251及一環繞於頂面部分251側面的側壁部分252,所述底蓋26容置於所述側壁部分的內緣。 As shown in FIG. 2, the oil storage chamber 25 is a circular recess provided in the bottom surface of the bearing fixing portion 24, and has a top surface portion 251 and a side wall portion 252 surrounding the side surface of the top surface portion 251. A bottom cover 26 is received at an inner edge of the side wall portion.
如圖4及圖5所示,所述底蓋的頂面具有一向上突起的凸緣261,所述凸緣261的頂緣接觸於所述儲油室25的頂面部分251。所述凸緣261的高度與儲油室25的高度接近,因此可以形成一能夠阻止潤滑油脂從從儲油室25的開口露出的阻隔牆。本發明的底蓋26與儲油室25之間進一步設置有可供儲油室25內部氣體與外界流通的逃氣結構。所述的逃氣結構,包括於所述凸緣261的頂緣與儲油室25的頂面部分251之間保留一微小間隙,以及所述底蓋26的一側邊設有一缺口部262,所述儲油室25內的氣體依序經過凸緣261和頂面部分251之間的微小間隙及所述缺口部262,以流通到所述儲油室25的外部。 As shown in FIGS. 4 and 5, the top cover of the bottom cover has an upwardly projecting flange 261, and the top edge of the flange 261 is in contact with the top surface portion 251 of the oil reservoir 25. The height of the flange 261 is close to the height of the oil reservoir 25, so that a barrier wall capable of preventing the grease from being exposed from the opening of the oil reservoir 25 can be formed. The bottom cover 26 of the present invention and the oil storage chamber 25 are further provided with an escape structure for allowing gas inside the oil storage chamber 25 to circulate to the outside. The air escaping structure includes a small gap between the top edge of the flange 261 and the top surface portion 251 of the oil storage chamber 25, and a side of the bottom cover 26 is provided with a notch portion 262. The gas in the oil storage chamber 25 sequentially passes through the minute gap between the flange 261 and the top surface portion 251 and the notch portion 262 to flow to the outside of the oil storage chamber 25.
為防止潤滑油脂從凸緣261和頂面部分251之間的微小間隙洩漏,本發明凸緣261和頂面部分251之間的間隙尺寸控制於非常小的範圍內,一般而言所述微小間隙的尺寸介於1-3μm的範圍內,同時於凸緣261和頂面部分251塗佈有撥油劑,使得所述凸緣和所述頂面部分之間的所述微小間隙僅供儲油室內部的氣體通 過,但同時又可阻止潤滑油脂從所述微小間隙通過,因此達到同時兼顧阻隔潤滑油脂洩漏,同時又可供氣體流通的目的。 In order to prevent the grease from leaking from the minute gap between the flange 261 and the top surface portion 251, the gap size between the flange 261 and the top surface portion 251 of the present invention is controlled to a very small range, generally speaking, the minute gap The size is in the range of 1-3 μm, while the flange 261 and the top surface portion 251 are coated with an oil-repellent agent, so that the minute gap between the flange and the top surface portion is only for oil storage. Gas passage in the interior However, at the same time, the lubricating grease can be prevented from passing through the minute gap, so that the leakage of the lubricating grease can be achieved at the same time, and at the same time, the gas can be circulated.
本發明的軸承本體21採用上述設計,主要的特點在於所述的軸承本體21本身一體成型設有軸承固定部24,可透過軸承固定部24直接固定於底板11的固定座12上,同時在軸承本體21上一體成型設有儲油室25,因此可完全地不需要軸套,便可達到固定軸承本體並建立儲油空間的目的。 The bearing body 21 of the present invention adopts the above design, and the main feature is that the bearing body 21 itself is integrally formed with a bearing fixing portion 24, which can be directly fixed to the fixing seat 12 of the bottom plate 11 through the bearing fixing portion 24, and at the same time in the bearing. The body 21 is integrally formed with an oil storage chamber 25, so that the sleeve can be completely eliminated, and the purpose of fixing the bearing body and establishing the oil storage space can be achieved.
由於動壓軸承總成20中可省略了軸套的元件,因此在維持動壓軸承總成10相同的外徑的前提下,軸承本體21因為省略了軸套所佔的厚度,使得軸承本體21的外徑可以擴大,也連帶使得轉軸孔22與轉軸30的直徑增加,因此使得本發明的轉軸30與轉軸孔22之間的油膜承載面積加大,而使的轉軸30運轉更為穩定。 Since the components of the sleeve can be omitted in the dynamic pressure bearing assembly 20, the bearing body 21 is made to have the same outer diameter of the dynamic pressure bearing assembly 10, so that the bearing body 21 omits the thickness occupied by the sleeve, so that the bearing body 21 The outer diameter of the shaft can be enlarged, and the diameter of the shaft hole 22 and the shaft 30 is increased, so that the oil film bearing area between the shaft 30 and the shaft hole 22 of the present invention is increased, and the shaft 30 is operated more stably.
本發明的軸承本體另一特點,在於軸承本體21的轉軸孔22內側壁面的導油溝槽23是以車削技術手段成型,相較於習用的以蝕刻或模塑成型方式成型的技術手段,更可以達到精確控制導油溝槽23的尺寸及幾何形狀的目的。如圖7所示,本發明所述導油溝槽23的成型方式,為利用一個成型刀具40於軸承本體21的轉軸孔22內側壁車削出所述的導油溝槽。所述成型刀具40的側面具有至少一個向外延伸的成型刀刃41的其車削的方式,其成型方式如圖7所示,是利用成型刀具40伸入到軸承本體21的轉軸孔22內部,並控制成型刀具40與軸承本體21的轉軸孔22產生軸向的相對運動,同時成型刀具40的成型刀刃41接觸到轉軸孔22的內側壁,同時控制成型刀具40的成型刀刃41和轉軸孔22產生以所述轉軸孔的軸心為中心的相對往復旋轉運動,使得成型刀刃41在轉軸孔22的內側壁產生與所述導油溝槽23相符的人字形的相對移動路徑,而於轉軸孔22的內側壁車削出所述的導油溝槽23。 Another feature of the bearing body of the present invention is that the oil guiding groove 23 on the inner wall surface of the rotating shaft hole 22 of the bearing body 21 is formed by turning technology, and is compared with the conventional technical means of forming by etching or molding. The purpose of precisely controlling the size and geometry of the oil guiding groove 23 can be achieved. As shown in FIG. 7, the oil guiding groove 23 of the present invention is formed by cutting the oil guiding groove on the inner side wall of the rotating shaft hole 22 of the bearing body 21 by a molding tool 40. The side surface of the forming tool 40 has a manner of turning at least one outwardly extending forming blade 41, which is formed as shown in FIG. 7 and is formed by the forming tool 40 into the shaft hole 22 of the bearing body 21, and The axial direction relative movement of the forming tool 40 and the shaft hole 22 of the bearing body 21 is controlled, while the forming blade 41 of the forming tool 40 contacts the inner side wall of the rotating shaft hole 22 while controlling the forming blade 41 and the rotating shaft hole 22 of the forming tool 40. The relative reciprocating rotational motion centering on the axis of the shaft hole causes the forming blade 41 to generate a herringbone relative movement path corresponding to the oil guiding groove 23 on the inner side wall of the shaft hole 22, and the shaft hole 22 is formed in the shaft hole 22 The inner side wall turns the oil guiding groove 23 described.
本發明利用此一方式所製成的導油溝槽23所具有的特徵,在於每一個所述導油溝槽23分別具有一個位於所述導油溝槽23的 一端的入刀口231,以及一個位於每一個所述導油溝槽23末端的出刀口232,以供所述成型刀具的成型刀刃進入或退出所述導油溝槽23的兩端。 The oil guiding groove 23 produced by the present invention has the feature that each of the oil guiding grooves 23 has one of the oil guiding grooves 23 respectively. A cutting edge 231 at one end and a cutting edge 232 at the end of each of the oil guiding grooves 23 are provided for the forming blade of the forming tool to enter or exit both ends of the oil guiding groove 23.
本發明採用的成型刀具40的成型刀刃41經由精密加工方式成型,因此可以精確地控制每一個導油溝槽的截面形狀與尺寸。同時本發明可搭配專用工具機或者是數值控制工具機精確控制成型刀具40的成型刀刃41於轉軸孔22內壁的車削路徑,因此可以精確地控制導油溝槽23的路徑,因此提高本發明的導油溝槽23的精密度,而使得本發明的動壓軸承總成20在運轉時,能夠達到更精確控制油膜產生的目的。 The forming blade 41 of the forming tool 40 employed in the present invention is formed by precision machining, so that the sectional shape and size of each of the oil guiding grooves can be precisely controlled. At the same time, the present invention can precisely control the turning path of the forming blade 41 of the forming tool 40 on the inner wall of the rotating shaft hole 22 with a special machine tool or a numerical control machine tool, so that the path of the oil guiding groove 23 can be accurately controlled, thereby improving the present invention. The precision of the oil guiding groove 23 allows the dynamic pressure bearing assembly 20 of the present invention to achieve a more precise control of oil film generation during operation.
另參閱圖9所示,為本發明之使用動壓軸承的風扇結構10的組裝程序,其組裝程序包括下列步驟: Referring to FIG. 9, which is an assembly procedure of the fan structure 10 using the dynamic pressure bearing of the present invention, the assembly procedure includes the following steps:
S1、軸承組裝步驟:係將所述底蓋裝置於所述軸承本體的底部的儲油室中,並將所述軸承本體以壓配合方式裝置於所述底板的固定座的步驟。 S1. A bearing assembly step: the step of disposing the bottom cover in an oil storage chamber at the bottom of the bearing body and fitting the bearing body to a fixing seat of the bottom plate in a press fit manner.
S2、定子組裝步驟:係將所述定子組裝於所述底板或所述軸承本體上。 S2. Stator assembly step: assembling the stator on the bottom plate or the bearing body.
S3、轉子組裝步驟:係將所述轉子組裝於所述風扇葉片之上; S3, a rotor assembly step: assembling the rotor on the fan blade;
S4、風扇組裝步驟:係將所述所述風扇葉片組裝於所述轉軸頂端。 S4. A fan assembly step: assembling the fan blade to a top end of the rotating shaft.
S5、注油步驟:係將潤滑油脂從軸承本體的轉軸孔注入所述儲油室內。 S5. Oil filling step: injecting lubricating grease into the oil storage chamber from a shaft hole of the bearing body.
S6、組合步驟:將組裝好風扇葉片的轉軸連同風扇葉片一起***到轉軸孔內。 S6. Combining step: inserting the rotating shaft of the assembled fan blade into the shaft hole together with the fan blade.
如圖8所示,為本發明第二實施例,第二實施例為本發明的技術運用於厚型散熱風扇模組的實施例。該實施例中的風扇結構10及動壓軸承總成20具有較高的高度,同時,軸承本體21以及 轉軸30的高度也大於第一實施例的軸承本體21與轉軸30的高度。該第二實施例的軸承本體21轉軸孔22內部具有一排以上的導油溝槽23。 As shown in FIG. 8, which is a second embodiment of the present invention, the second embodiment is an embodiment of the technology of the present invention applied to a thick heat dissipation fan module. The fan structure 10 and the dynamic pressure bearing assembly 20 in this embodiment have a high height, and at the same time, the bearing body 21 and The height of the rotating shaft 30 is also larger than the height of the bearing body 21 and the rotating shaft 30 of the first embodiment. The bearing body 21 of the second embodiment has a row of oil guiding grooves 23 inside the shaft hole 22.
如圖8所示的實施例中,軸承本體21的轉軸孔22內側壁面沿著轉軸孔22的軸向排列設置有兩排的導油溝槽23,且兩排導油溝槽23之間設置一隔離槽233將兩排導油溝槽23隔離開來。隔離槽233的作用為提供該實施例的軸承本體21在車削導油溝槽23時,前述的車削成型刀具40到達轉軸孔22的中段位置時退出成型刀刃的空間,以利於使用成型刀具車削方式成型上述的導油溝槽23。 In the embodiment shown in FIG. 8, the inner wall surface of the shaft hole 22 of the bearing body 21 is arranged along the axial direction of the shaft hole 22 with two rows of oil guiding grooves 23, and the two rows of oil guiding grooves 23 are arranged. An isolation groove 233 isolates the two rows of oil guiding grooves 23. The function of the isolation groove 233 is to provide the bearing body 21 of the embodiment when the oil guiding groove 23 is turned, and the aforementioned turning forming tool 40 reaches the middle position of the rotating shaft hole 22, and exits the space of the forming blade, so as to facilitate the turning of the forming tool. The above-described oil guiding groove 23 is formed.
本發明採用上述技術手段所達成的功效歸納如下: The effects achieved by the present invention using the above technical means are summarized as follows:
1、本發明的風扇結構使用的動壓軸承總成20中,軸承本體21與軸承固定部24一體成型,同時又直接將儲油室一體成型於軸承本體的底端,因此使得軸承本體21不需使用軸套,因此使得轉軸孔22及轉軸直徑可以加大,而使得轉軸30具有較大的油膜承載面積,而提高其運轉穩定性,並減少偏擺。 1. In the dynamic pressure bearing assembly 20 used in the fan structure of the present invention, the bearing body 21 and the bearing fixing portion 24 are integrally formed, and at the same time, the oil storage chamber is integrally formed at the bottom end of the bearing body, thereby making the bearing body 21 not The bushing needs to be used, so that the diameter of the rotating shaft hole 22 and the rotating shaft can be increased, so that the rotating shaft 30 has a large oil film bearing area, thereby improving the running stability and reducing the yaw.
2、由於軸承本體21直接安裝於底板11的固定座12上,可直接將軸承本體21安裝在底板11的定位上,由於省除了軸套的定位誤差,使得軸承本體21以及轉軸孔22的定位可以更加精確,而能夠避免轉軸30中心偏斜的情形產生,因此可有效降低轉軸偏斜所造成的風扇運轉震動與噪音的情形。 2. Since the bearing body 21 is directly mounted on the fixing base 12 of the bottom plate 11, the bearing body 21 can be directly mounted on the positioning of the bottom plate 11, and the positioning of the bearing body 21 and the rotating shaft hole 22 is eliminated because the positioning error of the sleeve is omitted. It can be more precise, and can avoid the situation that the center of the rotating shaft 30 is skewed, so that the vibration and noise of the fan caused by the deflection of the rotating shaft can be effectively reduced.
3、本發明的軸承本體21外側未套合軸套,因此軸承本體21不受軸套的壓迫,同時軸承本體21設計成軸承固定部24與固定座12套合位置不與轉軸孔22重疊,因此可避免軸承本體21受壓迫造成轉軸孔22尺寸偏差及真圓度變形的情形產生,因此可確保轉軸孔22與轉軸30間的間隙尺寸保持於標準範圍內,而能夠確保轉軸30運轉時可以建立起油膜。 3. The outer side of the bearing body 21 of the present invention is not sleeved, so that the bearing body 21 is not pressed by the sleeve, and the bearing body 21 is designed such that the bearing fixing portion 24 and the fixing seat 12 are not overlapped with the rotating shaft hole 22, Therefore, it is possible to prevent the bearing body 21 from being pressed to cause dimensional deviation and roundness deformation of the shaft hole 22, thereby ensuring that the gap size between the shaft hole 22 and the rotating shaft 30 is maintained within the standard range, and the rotation shaft 30 can be ensured to operate. Establish an oil film.
4、本案採用以成型刀具車削方式成型導油溝槽23,能夠精確控制每一個導油溝槽23的形狀與路徑,因此能夠更有效地達到引導潤滑油脂流動以形成具有壓力的油膜的目的。 4. In this case, the oil guiding groove 23 is formed by turning the forming tool, and the shape and path of each oil guiding groove 23 can be precisely controlled, so that the purpose of guiding the lubricating grease flow to form the oil film with pressure can be more effectively achieved.
以上所述僅為本發明的較佳可行實施例,非因此侷限本發明的專利範圍,故舉凡運用本發明說明書及圖式內容所做的等效技術變化,均包含於本發明的保護範圍內。 The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, equivalent technical changes made by using the present specification and the contents of the drawings are included in the protection scope of the present invention. .
10‧‧‧風扇結構 10‧‧‧Fan structure
11‧‧‧底板 11‧‧‧floor
12‧‧‧固定座 12‧‧‧ Fixed seat
13‧‧‧風扇葉片 13‧‧‧fan blades
14‧‧‧轉子 14‧‧‧Rotor
15‧‧‧定子 15‧‧‧ Stator
20‧‧‧動壓軸承總成 20‧‧‧Dynamic bearing assembly
21‧‧‧軸承本體 21‧‧‧ bearing body
23‧‧‧導油溝槽 23‧‧‧ Oil guide groove
24‧‧‧軸承固定部 24‧‧‧ bearing fixing department
241‧‧‧接合面 241‧‧‧ joint surface
25‧‧‧儲油室 25‧‧‧ oil storage room
26‧‧‧底蓋 26‧‧‧ bottom cover
261‧‧‧凸緣 261‧‧‧Flange
262‧‧‧缺口部 262‧‧‧ gap
263‧‧‧耐磨墊 263‧‧‧ wear pad
30‧‧‧轉軸 30‧‧‧ shaft
Claims (9)
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TWI644025B (en) * | 2017-04-12 | 2018-12-11 | 東培工業股份有限公司 | Fan device and bearing assembly thereof |
DE102019132130A1 (en) * | 2019-11-27 | 2021-05-27 | Duravit Aktiengesellschaft | Articulated arrangement for the pivotable mounting of a cover, a seat or a seat-cover set on a ceramic sanitary item |
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JPH08308172A (en) * | 1995-04-26 | 1996-11-22 | Sankyo Seiki Mfg Co Ltd | Motor using dynamic pressure bearing |
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TWM474076U (en) * | 2013-10-23 | 2014-03-11 | Xun Hao Electronics Kunshan Co Ltd | Fan and its bearing structure |
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JPH08308172A (en) * | 1995-04-26 | 1996-11-22 | Sankyo Seiki Mfg Co Ltd | Motor using dynamic pressure bearing |
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