TWI279062B - Bearing unit, and motor using same - Google Patents
Bearing unit, and motor using same Download PDFInfo
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- TWI279062B TWI279062B TW91124434A TW91124434A TWI279062B TW I279062 B TWI279062 B TW I279062B TW 91124434 A TW91124434 A TW 91124434A TW 91124434 A TW91124434 A TW 91124434A TW I279062 B TWI279062 B TW I279062B
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⑴ J日、發明細 a明說明應敘明:發明所屬之技術領域、先前技術、内容 發明之技術領域 本發明係有關一種軸承單元及使月 達 5 , 其為可旋轉地支撐軸體,或對軸體 ΜΆ 發明之背景技術 作為使用馬達的電子機器,有資料館 貝料儲存讀取設備之一的硬碟機設備, 被使南於除了大型的館存讀取設備、 用的儲存設備之外,還有筆記型的個人 腦尺寸還小的攜帶用的終端設備等的電 最近,被稱為PC(個人電腦)卡片尺寸 憶卡、或具有卡片型的數據機程度的大 碟機裝置被使用著。PC卡片型的硬碟機 要在筆記型個人電腦、攜帶用的終端設 拔使用。 在此種的硬碟機裝置,設有為了將作 媒體的硬碟機旋轉驅動的主軸馬達。主 單元將主軸可旋轉地支撐著。摩擦阻力 1所示之動壓力流體軸承單元被使用作 圖1所示的軸承單元1 060係具備於轴 了形成比軸部1 068直徑大的圓盤狀 1061、支持軸體1061的周向的徑向軸承 體1061的軸向的一端這邊的突出片 、實施方式及圖式簡單說明) 3該軸承單元之馬 可旋轉地支持旋轉 存讀取設備。作為 其用途正被擴展, 桌上型的個人電腦 電腦或比筆記型電 子機器。 的1C(積體電路)記 小的PC卡片型的硬 設備,使用者依需 備等的PC卡插槽插 為資料信號的儲存 軸馬達係使用軸承 小且負載小的如圖 每軸承單元。 部1 0 6 8的一端部設 的突出片的軸體 1 062、支撐設於軸 1 069的止推軸承 1279062(1) The present invention relates to a bearing unit and a yoke 5 which rotatably supports a shaft body, or a technical field to which the invention pertains, and a technical field of the invention. BACKGROUND OF THE INVENTION As an electronic device using a motor, a hard disk drive device having one of the material storage and reading devices of the museum is used in addition to a storage device for large-scale library storage devices and storage devices. In addition, a personal computer with a small size of a notebook, such as a PC (personal computer) card size memory card, or a card type computer with a card type is used. With. The PC card type hard disk drive should be used in a notebook PC or a portable terminal. In such a hard disk drive device, a spindle motor for rotationally driving a hard disk drive as a medium is provided. The main unit rotatably supports the main shaft. The dynamic pressure fluid bearing unit shown by the frictional resistance 1 is used as the bearing unit 1 060 shown in Fig. 1. The shaft is formed in the circumferential direction of the disk-shaped 1061 having a larger diameter than the shaft portion 1 068 and the support shaft 1061. The protruding piece, the embodiment and the drawing of the one end of the radial bearing body 1061 in the axial direction are simply described.) 3 The bearing unit of the bearing unit rotatably supports the rotary storage reading device. As its use is being expanded, a desktop PC or a notebook electronic device. The 1C (integrated circuit) is a small PC card type hard device. The PC card slot for users needs to be inserted as a data signal. The shaft motor uses a small bearing and a small load as shown in each bearing unit. The shaft body 1 062 of the protruding piece provided at one end of the portion 1 0 6 8 and the thrust bearing 1279062 supported on the shaft 1 069
(2) 1063、及將這些徑向轴承i〇62和止推軸承1063收藏支撐的 外殼1064。 徑向轴承1062的内周面,對向軸部1068的的外周面形成 著一對的第1動壓力產生溝槽1062a,1062a被形成,且在 與徑向軸承1062的軸體1061的突出片1069對向的端面,有 形成第2動壓力產生溝槽106 2b。與止推軸承1063的轴體 1061的突出片1 069對向的面,有形成第3動壓力產生溝槽 1063a。這些動壓力產生溝槽i〇62a、1062b及1063 a,將成 為V字型的一對溝槽於軸體1061的旋轉方向藉由連接溝槽 形成連磺的人字型溝槽。 支撐軸部1068的徑向軸承1062及收藏支撐止推軸承 1 063的外殼1064,為形成著兩端敞開的筒狀。外殼1064的 止推軸承1063所配設的這一邊,裝有蓋子且被密封。與外 殼1064的止推軸承1063所配設的這邊對向的這一邊,裝有 為了使軸體1061的軸部1 068插通的軸插通孔1 067打穿的 封緘構件1 0 6 6。 軸體1061於徑向軸承1062插通軸部1〇68,將一端的突出 片1069藉由止推軸承1 063被支持著。此時軸體1〇61使軸部 1〇68頂端這一邊經由軸插通孔1067由外殼1064凸出。 在外殼1064裡,軸體1061旋轉時藉由第i及第2動壓力產 生溝槽1062a、1062b裡的流通,充填一種使產生動壓力的 黏性流體之潤滑油。 像如此地,黏性流體所充填的外殼1 〇 6 4及封緘構件1 〇 6 6 之間的連接部1071、及外殼1064與蓋子1 065之間的連接部 (3) 1279062(2) 1063, and a housing 1064 that supports these radial bearings i〇62 and thrust bearings 1063. The inner peripheral surface of the radial bearing 1062, the pair of first dynamic pressure generating grooves 1062a, 1062a formed on the outer peripheral surface of the opposing shaft portion 1068, and the protruding piece of the shaft body 1061 of the radial bearing 1062 At the opposite end face of 1069, a second dynamic pressure generating groove 106 2b is formed. A third dynamic pressure generating groove 1063a is formed on a surface facing the protruding piece 1 069 of the shaft body 1061 of the thrust bearing 1063. These dynamic pressure generating grooves i 〇 62a, 1062b, and 1063 a form a chevron-shaped chevron groove by forming a pair of V-shaped grooves in the rotation direction of the shaft body 1061 by connecting grooves. The radial bearing 1062 of the support shaft portion 1068 and the outer casing 1064 of the collection support thrust bearing 1 063 are formed in a cylindrical shape in which both ends are open. The side of the thrust bearing 1063 of the outer casing 1064 is provided with a cover and sealed. The side opposite to the side on which the thrust bearing 1063 of the outer casing 1064 is disposed is provided with a sealing member 1 0 6 6 through which the shaft insertion hole 1 067 through which the shaft portion 1 068 of the shaft 1061 is inserted is inserted. . The shaft body 1061 is inserted into the shaft portion 1〇68 at the radial bearing 1062, and the projecting piece 1069 at one end is supported by the thrust bearing 1 063. At this time, the shaft body 1〇61 causes the top end of the shaft portion 1〇68 to protrude from the outer casing 1064 via the shaft insertion hole 1067. In the outer casing 1064, when the shaft body 1061 rotates, the first and second dynamic pressure generating grooves are formed in the grooves 1062a and 1062b, and a lubricating oil for generating a viscous fluid of a dynamic pressure is filled. As such, the connection portion 1071 between the outer casing 1 〇 6 4 and the sealing member 1 〇 6 6 filled with the viscous fluid and the connection portion between the outer casing 1064 and the cover 1 065 (3) 1279062
1072 ’為了要防止充填在外殼1〇64内的潤滑油的洩漏,藉 由黏著劑完全地被封住。在封緘構件1〇66的的内周面,藉 由由轴體1061的旋轉所產生的離心力等,有塗抹界面活性 劑防止潤滑油從軸插通孔1〇67向外殼1〇64的外面移動。 雖然使用於上述的軸承單元1〇6〇的軸體1〇61具有軸部 1068及圓盤狀的突出片1069 ,但在外殼1〇64裡的突出片 1069所位於的領域存有大的空隙 在此種的動廢力流體軸承單元1〇6〇,為了在軸體1〇61旋 轉時確實產生動壓力,有必要極高精密地維持轴體1061的 突出片1069與徑向軸承1062之間的空隙及突出片1〇69與 止推軸承1063之間的空隙,例如維持在數^111的精度。這些 空隙一旦太大,軸體1061旋轉時’不僅無法充分獲得由在 第1及第2動壓力產生溝槽1062a、1062b所產生的黏性流體 的動壓力效果,旦空隙成為不平均的話,旋轉的轴體 1 〇 6 1的擺振就顯著地變化。 戈口圖1所示1072' is completely sealed by the adhesive in order to prevent the leakage of the lubricating oil filled in the outer casing 1〇64. On the inner peripheral surface of the sealing member 1〇66, the application surfactant prevents the lubricating oil from moving from the shaft insertion hole 1〇67 to the outside of the casing 1〇64 by the centrifugal force generated by the rotation of the shaft 1061 or the like. . Although the shaft body 1〇61 used in the bearing unit 1〇6〇 described above has the shaft portion 1068 and the disc-shaped protruding piece 1069, there is a large gap in the field in which the protruding piece 1069 in the outer casing 1〇64 is located. In such a dynamic fluid bearing unit 1〇6〇, in order to generate dynamic pressure when the shaft body 1〇61 rotates, it is necessary to maintain the high precision between the protruding piece 1069 of the shaft body 1061 and the radial bearing 1062. The gap and the gap between the protruding piece 1〇69 and the thrust bearing 1063 are maintained, for example, at an accuracy of a number of 111. When these gaps are too large, when the shaft body 1061 rotates, it is not only impossible to sufficiently obtain the dynamic pressure effect of the viscous fluid generated by the first and second dynamic pressure generating grooves 1062a and 1062b, and if the gap becomes uneven, the rotation is performed. The shimmy of the shaft body 1 〇6 1 changes significantly. Gekou shown in Figure 1.
一廿啕大的空隙1 0 7 就無法充分得到藉由轴體1〇61的旋轉所產生的動壓; 果,軸體i〇6l的擺振就顯著地惡化。該軸承單元i〇6〇j 保持黏性流體不在外殼1064裡洩漏,將安裝形成筒狀g 殼1064的敞開端的蓋子1 065及封蝻姓μ Τ、钱構件1 0 6 6的連表 1〇71、1072,藉由黏著劑封住,更在封 人仕封緘構件1 066塗$ 面活性劑。為了採用如此的結構,不信 +僅零件數量增加 立工序也變成複雜。此外,使用勒 ‘者劑的密封管理习 難,也有所謂缺乏信賴性的問題點。 1279062The dynamic pressure generated by the rotation of the shaft body 1〇61 cannot be sufficiently obtained with a large gap of 1 0 7; however, the wobble of the shaft body i〇6l is remarkably deteriorated. The bearing unit i〇6〇j keeps the viscous fluid from leaking in the outer casing 1064, and the cover 1 065 which forms the open end of the cylindrical g-shell 1064 and the connection table of the seal member surname Τ and the money member 1 06 6 are attached. 71, 1072, sealed by an adhesive, and more than 1 066 coated with a surfactant. In order to adopt such a structure, it is not complicated to believe that only the number of parts is increased and the vertical process becomes complicated. In addition, there is also a problem of lack of reliability in the use of seal management practices. 1279062
(4) 發明之揭示 本發明的目的,係在提供一種可消除如上所述的先前軸 承單元的問題點之新型軸承單元及使用該軸承單元之馬 達0 本發明的其他目的,係在提供一種達到零件數量縮減、 裝配容易且信賴性高的軸承單元及使用該軸承單元之馬 達。(4) Disclosure of the Invention An object of the present invention is to provide a novel bearing unit capable of eliminating the problem of the prior bearing unit as described above and a motor 0 using the same. A bearing unit with a reduced number of parts, easy assembly and high reliability, and a motor using the bearing unit.
本發明的另外其他目的,係在提供一種軸體或軸體所支 持的構件在穩定的狀態下平順地可旋轉的軸承單元及使 用該軸¥單元之馬達。 本發明的另外其他目的,係在提供一種可防止充填在外 殼裡的潤滑油等黏性流體的洩漏的軸承單元及使用該軸 承單元之馬達。Still another object of the present invention is to provide a bearing unit in which a shaft or a shaft body member is smoothly rotatable in a stable state and a motor using the shaft unit. Still another object of the present invention is to provide a bearing unit capable of preventing leakage of a viscous fluid such as lubricating oil filled in an outer casing, and a motor using the same.
本發明的另外其他目的,係在提供一種對於馬達的定子 等的一定安裝位置可容易且確實地安裝的軸承單元及使 用該軸承單元之馬達。 本發明的另外其他目的,係在提供一種軸承單元及使用 該軸承單元之馬達,該軸承單元可將在軸體等的旋轉部分 所產生的靜電確實地往外部釋放,且可達到使用該軸承單 元之電子機器的確實地保護。 為了達成如上所述的目的,所提案的有關本發明的軸承 單元,具有形成剖面圓形的軸部及形成比設於上述軸部的 一端的上述軸部還大直徑的圓盤狀突出體的軸體、進行軸 體周向支撐的軸承、對向突出而體配設且支撐軸體的止推 1279062Still another object of the present invention is to provide a bearing unit which can be easily and surely mounted at a certain mounting position of a stator or the like of a motor, and a motor using the bearing unit. Still another object of the present invention is to provide a bearing unit and a motor using the same, which can reliably discharge static electricity generated at a rotating portion of a shaft body or the like to the outside, and can achieve the use of the bearing unit The electronic machine is truly protected. In order to achieve the above object, a bearing unit according to the present invention has a shaft portion having a circular cross section and a disk-shaped projection having a larger diameter than the shaft portion provided at one end of the shaft portion. The shaft body, the bearing for the circumferential support of the shaft body, and the thrust of the opposite body and supporting the shaft body 1270062
方向一端的軸承、支撐軸體的徑向軸承及軸承被配置於内 部的同時,黏性流體被充填、除了軸體所插通的軸插通孔 之外結構密封的外殼、具有配置於外殼内部使保持徑向軸 承的端面與突出體的另一邊表面之間的間隔的間隔構 件、在與突出體的徑向軸承的端面對向的另一邊表面或與 另一邊表面對向的止推軸承的端面的任一邊,形成使由黏 性流體產生的動壓力的動壓力產生部、在與止推軸承的突 出體的另一邊表面對向的面或與突出體的另一邊表面的 任一邊,形成使產生由黏性流體的動壓力的動壓力產生 部。 1 藉由間隔構件,可高精密地維持徑向軸承的端面與突出 體的另一邊表面之間的間隔,使各動壓力產生部產生穩定 的動壓力。 有關本發明的軸承單元,更在與徑向轴承的軸部對向的 内為表面,形成使產生由黏性流體的動壓力的動壓力產生The bearing at one end of the direction, the radial bearing supporting the shaft body, and the bearing are disposed inside, and the viscous fluid is filled, and the outer casing is sealed except for the shaft insertion hole through which the shaft body is inserted, and is disposed inside the outer casing. a spacer member that maintains a space between an end surface of the radial bearing and the other side surface of the protrusion, a other side surface that faces the end surface of the radial bearing of the protrusion or a thrust bearing that faces the other side surface Any one of the end faces forms a dynamic pressure generating portion that generates a dynamic pressure generated by the viscous fluid, a surface that faces the other side surface of the protruding body of the thrust bearing, or either side of the other side surface of the protruding body. A dynamic pressure generating portion that generates a dynamic pressure generated by the viscous fluid is formed. 1 By the spacer member, the interval between the end surface of the radial bearing and the other side surface of the projecting body can be maintained with high precision, so that the dynamic pressure generating portions generate a stable dynamic pressure. The bearing unit according to the present invention is further formed on the surface opposite to the shaft portion of the radial bearing to form a dynamic pressure generating a dynamic pressure generated by the viscous fluid.
部。 在徑向軸承也由於設置動壓力產生部,軸體藉由在止推 方向的全部於動壓力產生部產生的動壓力被支撐,故控制 負載而變成可旋轉。 有關本發明的軸承單元,在與軸體的軸插通孔的内周面 之間所形成的空隙,為足夠防止從充填於外殼的黏性流體 的外殼的洩漏,且防止來自空隙的黏性流體的洩漏、散開。 外殼係藉由合成樹脂的成形一體形成。 外殼所成形的軸插通孔的内周面或與該内周面對向的 -10- 1279062unit. In the radial bearing, the dynamic pressure generating portion is also provided, and the shaft body is supported by the dynamic pressure generated by all of the dynamic pressure generating portions in the thrust direction, so that the load is controlled to become rotatable. In the bearing unit according to the present invention, the gap formed between the inner peripheral surface of the shaft insertion hole of the shaft body is sufficient to prevent leakage from the outer casing of the viscous fluid filled in the outer casing, and to prevent stickiness from the void. Fluid leaks and spreads out. The outer casing is integrally formed by molding of a synthetic resin. The inner circumferential surface of the shaft insertion hole formed by the outer casing or facing the inner circumference -10- 1279062
⑹(6)
軸體的軸部的外周面的任一邊,使軸部的外周面與軸插通 孔的内周面之間所成形的空隙往外殼的外面擴大而成形 傾斜的錐形部。藉由錐形部的成形,可將充填於外殼的黏 性流體拉進外殼裡,更加能夠確實地防止由流體的外殼的 汽漏。 黏性流體,至少面對到軸體的外周面與軸插通孔的内周 面之間所成形的空隙内而被充填至外殼裡。On either side of the outer peripheral surface of the shaft portion of the shaft body, a gap formed between the outer peripheral surface of the shaft portion and the inner peripheral surface of the shaft insertion hole is enlarged to the outer surface of the outer casing to form an inclined tapered portion. By forming the tapered portion, the viscous fluid filled in the outer casing can be pulled into the outer casing, and the leakage of the outer casing by the fluid can be surely prevented. The viscous fluid is filled into the outer casing at least in a gap formed between the outer peripheral surface of the shaft body and the inner peripheral surface of the shaft insertion hole.
間隔構件具有固定在外殼的内周面圓筒部,及與圓筒部 一體形成、突出於圓筒部的半徑方向的環狀套筒。 間隔^4件的圓筒部的一部份係經由外殼的孔露在外部。 外殼及間隔構件也可以一體形成。 徑向軸承及間隔構件也可以一體形成。 軸體係藉由徑向軸承及止推軸承對外殼可旋轉地被支 撐的旋轉軸。The spacer member has a cylindrical portion fixed to the inner peripheral surface of the outer casing, and an annular sleeve integrally formed with the cylindrical portion and protruding in the radial direction of the cylindrical portion. A portion of the cylindrical portion of the spacer 4 is exposed to the outside through the hole of the outer casing. The outer casing and the spacer member may also be integrally formed. The radial bearing and the spacer member may also be integrally formed. The shaft system is a rotating shaft that is rotatably supported by the outer casing by a radial bearing and a thrust bearing.
此外,軸體係被固定的軸體,且外殼也可以經由徑向軸 承及止推軸承對軸體可旋轉。 外殼的止推軸承所配設的這邊的端部側面部分,藉由合 成樹脂形成,且徑向軸承被熔接於由所配設的合成樹脂作 成之外殼本體而被一體化。 再者,外殼的止推轴承所配設的這邊的端部側面部分, 也可以被外塑成形於徑向軸承所配設的外殼本體而與上 述外殼本體一體化。 外殼的止推軸承所配設的這邊的端部側面部分,藉由比 徑向軸承所配設的外殼本體的耐熱溫度成形溫度還低的 -11- 1279062In addition, the shaft system is fixed to the shaft body, and the outer casing can also be rotatable to the shaft body via the radial bearing and the thrust bearing. The end side portion of the outer side of the thrust bearing is formed of a synthetic resin, and the radial bearing is welded to the outer casing body made of the synthetic resin to be integrated. Further, the side surface portion of the side of the thrust bearing of the outer casing may be externally molded into the outer casing body of the radial bearing to be integrated with the outer casing body. The end side portion of the outer side of the thrust bearing is lower than the heat-resistant temperature forming temperature of the outer casing body of the radial bearing -11-1279062
⑺ 合成樹脂與外殼本體一體化。 徑向軸承最好使用由燒結金屬所形成的材料。 在軸體可使用將由合成樹脂形成的突出體一體組裝於 金屬製的軸部的材料。此時,突出體也可由燒結金屬形 成,且一體組裝於金屬製的軸部的材料。(7) The synthetic resin is integrated with the outer casing body. The radial bearing preferably uses a material formed of sintered metal. As the shaft body, a material in which a projecting body made of a synthetic resin is integrally assembled to a shaft portion made of metal can be used. At this time, the protrusions may be formed of a sintered metal and integrally assembled to the material of the metal shaft portion.
在軸承單元的外殼,對於外殼所組裝的組裝對象部藉由 設置為了機械性的固定的固定機構達成定位的確實組裝 變成可行。 軸體、黏性流體、徑向軸承、及外殼藉由形成往外殼外 部的放i路徑,可將靜電往外部釋放。In the outer casing of the bearing unit, it becomes possible to assemble the assembly target portion to which the outer casing is assembled by providing a fixing mechanism for mechanical fixing. The shaft body, the viscous fluid, the radial bearing, and the outer casing can release static electricity to the outside by forming a path to the outside of the outer casing.
有關本發明的其他的軸承單元係具備:有形成比設於成 為斷面圓形的軸部與軸部的一端部的軸部大直徑的圓盤 狀的突出體的軸體,支撐軸體的圓周方向的止推軸承,支 撑軸體的止推軸承,對向突出體而配設、支撐軸體的止推 方向的一端的止推軸承,支撑軸體的徑向軸承與止推軸承 被配設於内部的同時黏性流體被充填,及軸體除了***通 的軸插通孔外為密封的構造;在外殼設有:容納徑向軸承 而保持的第1收藏保持部,收藏止推軸承而保持的第 2收 藏保持部,將徑向軸承與止推軸承之間所形成的軸體的突 出體可旋轉地收藏的突出體收藏部,及在隔開第 1收藏保 持部與突出體收藏部的位置的間隔片。在與該間隔片的軸 體的突出體對向的面或與突出體的間隔片對向的面之任 何一面,形成使產生由於黏性流體的動壓力之動壓力產生 部。 -12- 1279062The other bearing unit according to the present invention includes a shaft body having a disk-shaped projection that is larger than a shaft portion that is provided at one end portion of the shaft portion and the shaft portion that is circular in cross section, and supports the shaft body. a thrust bearing in the circumferential direction, a thrust bearing supporting the shaft body, and a thrust bearing disposed at one end of the thrust body to support the thrust body of the shaft body, and the radial bearing and the thrust bearing of the support shaft body are matched The internal viscous fluid is filled, and the shaft body is sealed except for the inserted shaft insertion hole; the outer casing is provided with: a first storage holding portion that holds the radial bearing and holds the thrust bearing In the second storage holding portion, the protruding body collecting portion that rotatably collects the protruding body of the shaft body formed between the radial bearing and the thrust bearing, and the first collecting and holding portion and the protruding body are separated The spacer of the position of the part. On either side of the surface facing the projection of the shaft of the spacer or the surface facing the spacer of the projection, a dynamic pressure generating portion for generating a dynamic pressure due to the viscous fluid is formed. -12- 1279062
⑻ 在該軸承單元,更形成在與徑向軸承的軸部對向的内周 面使產生由於黏性流體的動壓力之動壓力產生部。 再者,在與軸體的突出體對向的面或與突出體的止推軸 承對向的面之任何一面,形成使產生由於黏性流體的動壓 力之動麗力產生部。(8) In the bearing unit, a dynamic pressure generating portion that generates a dynamic pressure due to the viscous fluid is formed on the inner peripheral surface opposed to the shaft portion of the radial bearing. Further, on either side of the surface facing the projecting body of the shaft body or the surface facing the thrust bearing of the projecting body, a dynamic force generating portion for generating a dynamic pressure due to the viscous fluid is formed.
本發明係一種馬達,其具備對於定子將轉子可旋轉地維 持的軸承單元;且構成該馬達的軸承單元具有:有形成比 設於成為斷面圓形的軸部與軸部的一端部的軸部大直徑 的圓盤狀的突出體的軸體,支撐軸體的圓周方向的止推軸 承,對ά突出體而配設、支撐軸體的止推方向的一端的止The present invention is a motor including a bearing unit that rotatably holds a rotor for a stator; and the bearing unit constituting the motor has an axis formed at an end portion of a shaft portion and a shaft portion that are circular in cross section A shaft body of a large-diameter disk-shaped projecting body supports a thrust bearing in a circumferential direction of the shaft body, and is disposed to support the projecting body and support one end of the shaft body in the thrust direction.
推軸承,支撐軸體的徑向軸承與止推軸承被配設於内部的 同時黏性流體被充填,軸體除了***通的軸插通孔外為密 封的構造,及配置於外殼的内部使徑向軸承與突出體一邊 的面之間的保持間隔的間隔構件;在與突出體的一邊的面 對向的徑向軸承的端面,形成使產生由於黏性流體的動壓 力之動壓力產生部。 本發明的其他馬達,係具備對於定子將轉子可旋轉地支 撐的軸承單元;且構成該馬達的軸承單元具有:有形成比 設於成為斷面圓形的軸部與軸部的一端部的軸部大直徑 的圓盤狀的突出體的軸體,支撐軸體的圓周方向的止推軸 承,對向突出體而配設、支撐軸體的止推方向的一端的止 推軸承,支撐轴體的徑向軸承與止推軸承被配設於内部的 同時黏性流體被充填,及軸體除了***通的軸插通孔外為 密封的構造的外殼;在外殼設有:容納徑向軸承而保持的 -13- (9) 1279062The bearing is supported, and the radial bearing and the thrust bearing supporting the shaft body are disposed inside while the viscous fluid is filled, and the shaft body is sealed except for the inserted shaft insertion hole, and is disposed inside the casing. a spacer member that maintains a space between the radial bearing and a surface on one side of the protrusion; and an end surface of the radial bearing facing the one side of the protrusion, forming a dynamic pressure generating portion that generates dynamic pressure due to the viscous fluid . The other motor of the present invention includes a bearing unit that rotatably supports the rotor with respect to the stator, and the bearing unit constituting the motor has an axis formed at one end portion of the shaft portion and the shaft portion that are circular in cross section. a shaft body of a large-diameter disk-shaped projecting body, a thrust bearing supporting a circumferential direction of the shaft body, and a thrust bearing for supporting one end of the shaft body in the thrust direction of the shaft body, and supporting the shaft body The radial bearing and the thrust bearing are disposed inside while the viscous fluid is filled, and the shaft body is a sealed outer casing except for the inserted shaft insertion hole; the outer casing is provided with: a radial bearing is accommodated Keep -13- (9) 1279062
第1收臧保持部 ^ ^ · ·'可的第2收藏保持部, 將徑向軸承與止推軸承之間所形虑 取的軸體的突出體可於 轉地收藏的突出體收藏部,在隔開笛 # 昂1收藏保持部與突屮 體收藏部的位置的間隔片,及在與間 崎片的車由體的突屮辦 對向的面,形成使產生由於黏性流體 生部。 的動壓力之動壓力產 發明所得到的具體優 形態解釋可更加清楚 本發明的另外其他目的、藉由本 點,參照下面圖面,由所說明的實施The first receiving and holding unit is a second storage holding unit that can be shaped between the radial bearing and the thrust bearing, and the protruding body of the shaft body can be placed in the protruding body collecting portion of the rotating place. The spacer which separates the position of the flute # 昂 1 collection holding portion and the sacral body accommodating portion, and the surface opposite to the spurs of the car body of the Kawasaki sheet are formed so as to be generated by the viscous fluid. The dynamics of the dynamic pressure of the invention can be more clearly explained by the invention. Other objects of the present invention, by way of the following, are illustrated by the following figures.
吧 。 發明之i佳實施形態 的輛承單元及使用該 吏用忒軸承單元的馬 單疋之馬達為驅動來 以下,參照圖面說明本發明所適用 軸承單元之馬達的實施形態。 在說明有關本發明的軸承單元及 達之前,說明使用有關本發明的軸承 源的電子機器。 該電子機器,為被裝於進行各種資社Let's go. The bearing unit of the preferred embodiment of the invention and the motor of the unit using the 忒 bearing unit are driven. Hereinafter, an embodiment of the motor of the bearing unit to which the present invention is applied will be described with reference to the drawings. Prior to describing the bearing unit of the present invention, an electronic machine using the bearing source of the present invention will be described. The electronic machine is installed in various kinds of companies.
貝抖的演算處理等的 料處理裝置的電腦内,或被作為電腦沾守的 旬的外部儲存裝置使 磁碟機驅動設備。該磁碟機驅動設借係^ ’、文表於筆記型個 電腦的PC卡槽而使用的,且構造非常小 阳》專 〇 本發明所適用的磁碟機驅動設備1,如圖1 鬩2至4所示, 具備:構成設備本體做的機殼2,該機殼2内所配置的兹 儲存媒體的硬碟機3,將該硬碟機3旋轉操作的 J ,關本發 的轴承單元所適用的馬達的主轴馬達4,藉由主車由_達 描被旋轉操作的硬碟機3的信號儲存區域, 久又持對於 -14- (10)1279062In the computer of the material processing device such as the calculation of the bell shake, or the external storage device that is used as a computer, the drive device is driven by the disk drive. The drive of the drive is used by the PC card slot of the notebook computer, and the structure is very small. The drive device 1 for the present invention is applicable to the present invention, as shown in FIG. As shown in FIGS. 2 to 4, there is provided a casing 2 constituting a main body of the apparatus, a hard disk drive 3 in which the medium is stored in the casing 2, and a bearing unit in which the hard disk drive 3 is rotated and operated. The spindle motor 4 of the applicable motor is held by the main vehicle from the signal storage area of the hard disk drive 3 that is rotated and operated for a long time, for a long time -14-(10)1279062
碟機3的資料信號的儲 動裝置6。 機殼2係將上下兩個 成0 存或進行讀取的磁頭5的轉動型傳 半的機殼2a,2b面對面結合而組 硬碟機3如圖5所示, 與該轉子15—體旋轉。 被固定在主軸馬達4的轉子15 且A storage device 6 for the data signal of the disc drive 3. The casing 2 is formed by face-to-face coupling of the rotating half-type casings 2a, 2b of the magnetic heads 5 which are stored or read up and down, and the group hard disk machine 3 is rotated as shown in FIG. . Is fixed to the rotor 15 of the spindle motor 4 and
支撐掃描硬碟機3的磁碩5的轉動型傳動裝置6係具備: 於硬碟機3的兩面各自被延長的一對的磁頭支持臂7及音 圈8。音圈8如圖4所示,邀址献里产从姐。& ,、被配置在外殼2内的一對磁鐵9 之間面_著而構成音圈8馬、告姑知别爲么壯祖. 達。轉動型傳動裝置6藉由於音 圈8驅動電机的供應’藉由由在音圈8被供電由而產生的磁 場及一對的磁鎩9所產;i 鐵汀座生的磁場的作用而引起的電磁力,The rotary actuator 6 supporting the magnetic spindle 5 of the scanning hard disk drive 3 includes a pair of magnetic head supporting arms 7 and a voice coil 8 which are extended on both sides of the hard disk drive 3. The voice coil 8 is shown in Figure 4. &, is placed between the pair of magnets 9 in the outer casing 2 to form a voice coil 8 horse, telling the singer to be a strong ancestor. The rotary type transmission 6 is produced by the magnetic field generated by the voice coil 8 by the magnetic field generated by the power supply in the voice coil 8 and a pair of magnetic yokes 9; The electromagnetic force caused,
將、員支持#7以支撐輛“為中心在圖2及圖3中箭頭I 方向及箭頭F2方向旋轉。藉由音圈馬達的驅動,磁頭支撐 # 7藉由被旋轉操作’對於在磁頭支撐臂7各自支撐的磁頭The supporter #7 supports the vehicle "centered in the direction of the arrow I and the arrow F2 in Fig. 2 and Fig. 3. By the drive of the voice coil motor, the head support #7 is rotated by the operation" for the support of the head Heads supported by arms 7
5所旋轉的硬碟機3的任意儲存執被定位而進行資料的儲 存或進行已被儲存的資料的讀取。故磁頭5可使用例如 有磁阻效果元件的東西。 再者’磁碟驅動裝置丨在機殼2的一端這邊,設有對於電 細等為了電氣性的連接的連接端子12。在機殼2的内部, 配置有安裝系統LSI (大型積體電路)13、IC (積體電路)等 的—般電子零件等的電路基板14。 方疋轉操作硬碟機3的主軸馬達4,如圖5所示具有轉子1 5 及定子16 。 -15- 1279062Any storage of the five rotating hard disk drives 3 is positioned to store data or to read stored data. Therefore, the magnetic head 5 can use, for example, a magnetoresistive effect element. Further, the disk drive unit is provided with a connection terminal 12 for electrical connection such as a capacitor on one end of the casing 2. Inside the casing 2, a circuit board 14 such as a general electronic component such as a system LSI (large integrated circuit) 13, an IC (integrated circuit), or the like is disposed. The spindle motor 4 of the hard disk drive 3 is rotated to have a rotor 15 and a stator 16 as shown in FIG. -15- 1279062
〇i) 轉子15具備有:硬碟機3放置的轉盤口所形成的轉子外 殼20,及與轉盤17共同挾住挾持構件18,及轉子磁鐵19。 故轉子15為轉子外殼20對於後述有關本發明的轴承單 元30可旋轉地支撐。 轉子外殼20 ,例如藉由鐵等的磁性材料形成,於中心部 穿設有配合孔26。轉子外殼20,藉由壓入設於將配合孔% 當作在軸承單兀30被支撐的主軸而作用的軸體51的先端 部的裝配部5 2 ’與軸承單元3 0的軸體5丨一體旋轉裝配。 轉盤17係突出轉子外殼20的外圍而形成,且硬碟機3被 載置。ά碟機3為内圈這邊的部分藉由被加壓熔接至轉盤 17及該轉盤17上面的挾持構件18與轉子外殼20 —體可旋 轉地被支撐著。再者’挾持構件1 8,例如由不銹鋼形成環 狀。 被配置於轉子外殼20的圓筒狀況部分的内周面的轉子 磁鐵1 9,形成環狀,且S極及Ν極於周圍旋轉交替地被磁 化。該磁鐵1 9,例如以敍系的燒結金屬實體形成。 與上述的轉子15共同構成主軸馬達4的定子16係具有: 定子外殼2 1,軸承單元3 0的外殼5 6,及驅動線圈22,驅動 線圈2 2為具有:被捲繞的鐵心2 3,及控制該主軸馬達4的 旋轉的驅動電路等被安裝而沒有圖式的軟性印刷基板。 定子外殼2 1例如以可不銹鋼來作,軟性印刷基板因黏在 該外殼2 1而被固定。軟性印刷基板電氣功能上被連接至驅 動線圈22。該驅動線圈22的U相端子、ν相端子、W相端子, 及共用端子,通過軟性印刷基板由定子外殼2 1拉出至外 -16 - (12) l279〇62〇i) The rotor 15 is provided with a rotor casing 20 formed by a turntable port on which the hard disk drive 3 is placed, and a holding member 18 and a rotor magnet 19 together with the turntable 17. Therefore, the rotor 15 is a rotor casing 20 that is rotatably supported by a bearing unit 30 according to the present invention to be described later. The rotor casing 20 is formed of, for example, a magnetic material such as iron, and a fitting hole 26 is formed in the center portion. The rotor casing 20 is press-fitted into the fitting portion 5 2 ' provided at the tip end portion of the shaft body 51 which acts as the main shaft supported by the bearing unit 30, and the shaft body 5 of the bearing unit 30. One-piece rotary assembly. The turntable 17 is formed to protrude from the outer periphery of the rotor casing 20, and the hard disk drive 3 is placed. The portion of the inner casing 3 which is the inner ring is rotatably supported by the rotor casing 20 by the welding member 18 which is press-welded to the turntable 17 and the upper portion of the turntable 17. Further, the holding member 18 is formed in a ring shape by, for example, stainless steel. The rotor magnet 19, which is disposed on the inner peripheral surface of the cylindrical condition portion of the rotor casing 20, is formed in a ring shape, and the S pole and the drain are alternately magnetized in the surrounding rotation. The magnet 197 is formed, for example, from a sintered metal body of the type. The stator 16 that constitutes the spindle motor 4 together with the rotor 15 described above has a stator casing 2, a casing 56 of the bearing unit 30, and a drive coil 22 having a core 2 3 that is wound, A drive circuit or the like that controls the rotation of the spindle motor 4 is mounted without a flexible printed circuit board of the drawings. The stator case 2 1 is made of, for example, stainless steel, and the flexible printed circuit board is fixed by being adhered to the case 21 . The flexible printed circuit board is electrically connected to the drive coil 22. The U-phase terminal, the ν-phase terminal, the W-phase terminal, and the common terminal of the drive coil 22 are pulled out from the stator case 21 by the flexible printed circuit board to the outside -16 - (12) l279〇62
軟性印刷基板為通過端子電氣功能上被連接至控制電 路部2 5。The flexible printed circuit board is electrically connected to the control circuit portion 25 through the terminals.
驅動線圈22被捲繞的鐵心23,例如設有9極。對此,轉 =磁鐵19 S極及N極例如為12極,於周向交替地被形成。 T驅動電流由通電控制部2 5以一定的通電電路被供應 w °動線圈2 2,藉由由驅動電流供應至驅動線圈2 2所產 、的磁%及轉子磁鐵19所產生的磁場的互相作用,轉子15 以車由體5 1為中心對定子i 6持續旋轉。 由2外喊21,圓筒部分28直立地被形成。該圓筒部分“藉 而具傷^成主軸馬達4主軸的軸體51的軸承單元3〇的*** 而被安裝。亦即圓筒部分28成為軸承單元3〇的安裝部。The core 23 to which the drive coil 22 is wound is provided, for example, with 9 poles. In this regard, the magnet 19 has a S pole and an N pole, for example, 12 poles, and is alternately formed in the circumferential direction. The T drive current is supplied from the energization control unit 25 to the w° coil 2 2 with a constant energization circuit, and the magnetic flux generated by the drive current supplied to the drive coil 22 and the magnetic field generated by the rotor magnet 19 are mutually In effect, the rotor 15 continuously rotates the stator i 6 with the vehicle centered on the body 51. The cylinder portion 28 is formed upright by 2 shouting 21. The cylindrical portion is "mounted" by the insertion of the bearing unit 3A of the shaft body 51 which is wound into the spindle of the spindle motor 4. That is, the cylindrical portion 28 serves as a mounting portion of the bearing unit 3A.
上所述,有關具備構成主軸馬達4的主軸的軸體5〗的 ^月之軸承單兀3 0,如圖6所示,具備··設於軸體5 j的 $邛53的一端部形成比軸部53大徑的圓盤狀的突出體的 大出片54,支撐軸體51的周向的徑向軸承η,支撐設於軸 體51的止推方向的一端這邊突出片54的止推軸承^,及收 藏支撐這些徑向軸承55與止推軸承58的外殼%。 、設於軸體51的一端這邊的圓盤狀的突出片54,在軸體Η 被徑向軸承55及止推軸承58支撐而被安裝於外殼%的時 候,抵接徑向軸承55的一端面並且也作為冑到由外殼% 的防止脫落的防止脫落片而發揮機能。 在支樓轴體51的周向的旋轉的徑向轴承55的内周面, 成對向軸部53的外周面構成使產生動壓力的動壓力產 部的一對的^動壓力產生部溝槽61、62。在與徑向轴 -17- 1279062As described above, the bearing unit 30 of the shaft body 5 including the main shaft 5 constituting the main shaft of the spindle motor 4 is provided at one end portion of the shaft 53 of the shaft body 5 j as shown in Fig. 6 . The large-sized piece 54 of the disk-shaped protrusion having a larger diameter than the shaft portion 53 supports the radial bearing η in the circumferential direction of the shaft body 51, and supports the protruding piece 54 provided at one end of the shaft body 51 in the thrust direction. The thrust bearing ^, and the collection support the % of the outer casing of the radial bearing 55 and the thrust bearing 58. The disc-shaped projecting piece 54 provided at one end of the shaft body 51 abuts against the radial bearing 55 when the shaft body 支撑 is supported by the radial bearing 55 and the thrust bearing 58 and is attached to the outer casing %. The one end face also functions as a detachment preventing sheet which is prevented from coming off by the outer casing %. In the inner peripheral surface of the radial bearing 55 that rotates in the circumferential direction of the branch shaft 51, the outer peripheral surface of the pair of the shaft portions 53 constitutes a pair of pressure generating portion grooves for the dynamic pressure generating portion that generates the dynamic pressure. Slots 61, 62. In with the radial axis -17- 1279062
(13) 55的軸體51的突出片54對向的一端面,也形成構成使產生 動壓力的動壓力產生部的第2的動壓力產生部溝槽63。而 且在與止推軸承58的軸體51的突出片54對向的面,也形成 構成使產生動壓力的動壓力產生部的第3動壓力產生部溝 槽64。 在徑向軸承5 5的内圍面對向軸部5 3的外周面而形成的 第1動壓力產生部溝槽61、62,如圖7所示,在徑向軸承55 的内圍面以成為V字狀的一對溝槽61 a於周圍四周方向藉 由連接溝槽6 1 b連續地當作形成的人字形溝槽而形成。第1 及第2動;壓力產生部溝槽6 1、62,為形成V字狀的一對溝槽 6 1 a的頂端這邊向軸體5 1的旋轉方向R!被形成。在本例 子,第1動壓力產生部溝槽61、62於作成圓筒狀的徑向軸 承55的方向的上下並列而形成。設於徑向軸承55的動壓力 產生部溝槽61、62數量、大小係根據徑向軸承55的大小、 長度等做適當選擇。 形成在徑向軸承55的一端表面的第2動壓力產生部溝槽 63,也如圖8所示,位於徑向軸承55的一端表面的的外圍 這邊,以成為V字狀的一對溝槽63 a於周向藉由連接溝槽 63b連續地作為形成的人字形溝槽而形成。此時,第2動壓 力產生部溝槽63,為形成V字狀的一對溝槽63a的頂端這邊 向軸體5 1的旋轉方向R!被形成。 在與止推軸承58的軸體51的突出片54對向的面形成的 第3動壓力產生溝槽64,也如圖9所示,位於形成圓盤狀的 止推軸承58的外周這邊,以成為V字狀的一對溝槽64a於周 -18- 1279062Further, the second dynamic pressure generating portion groove 63 constituting the dynamic pressure generating portion that generates the dynamic pressure is also formed on the opposite end surface of the projecting piece 54 of the shaft body 51 of the (13) 55. Further, a third dynamic pressure generating portion groove 64 constituting a dynamic pressure generating portion that generates a dynamic pressure is formed on a surface facing the protruding piece 54 of the shaft body 51 of the thrust bearing 58. The first dynamic pressure generating portion grooves 61 and 62 formed on the inner circumferential surface of the radial bearing 55 facing the outer circumferential surface of the shaft portion 53 are as shown in Fig. 7 on the inner circumferential surface of the radial bearing 55. A pair of grooves 61a which are V-shaped are formed in the circumferential direction in the circumferential direction by the connecting grooves 6 1 b continuously as the herringbone grooves formed. The first and second movements; the pressure generating portion grooves 6 1 and 62 are formed in the rotation direction R! of the shaft body 5 1 so that the distal ends of the V-shaped pair of grooves 6 1 a are formed. In the present example, the first dynamic pressure generating portion grooves 61 and 62 are formed in parallel in the vertical direction in which the cylindrical radial bearing 55 is formed. The number and size of the dynamic pressure generating portion grooves 61, 62 provided in the radial bearing 55 are appropriately selected in accordance with the size and length of the radial bearing 55. The second dynamic pressure generating portion groove 63 formed on one end surface of the radial bearing 55 is also located on the outer periphery of one end surface of the radial bearing 55 as shown in Fig. 8 to form a pair of grooves in a V shape. The groove 63a is formed continuously as a herringbone groove formed by the connecting groove 63b in the circumferential direction. At this time, the second dynamic pressure generating portion groove 63 is formed in the rotational direction R! of the shaft body 51 in the direction in which the distal ends of the V-shaped pair of grooves 63a are formed. The third dynamic pressure generating groove 64 formed on the surface opposed to the protruding piece 54 of the shaft body 51 of the thrust bearing 58 is also located on the outer circumference of the disk-shaped thrust bearing 58 as shown in FIG. To form a V-shaped pair of grooves 64a in the week -18- 1279062
向藉由連接溝槽64b連續地作為形成的人字形溝槽而形 成°此時’第3動壓力產生部溝槽64,為形成V字狀的一對 /冓槽64a的頂端這邊向軸體51的旋轉方向Ri被形成。 第1 至第3中任一項的動壓力產生部溝槽61〜64,為軸體 5 1才皮彡汉、少 二向軸承55及止推軸承58支撐而在外殼56内連續旋 轉時,餘—1 、 精由被充填於外殼56内的黏性流體的潤滑油67的流 ^使於軸體5 1、徑向軸承5 5及止推軸承5 8之間產生動壓 =而=輛體51的支撐。亦即徑向軸承55及向軸承“作為動 =力流體軸承而發揮功能。藉由軸體51的旋轉所產生的動 極i於將#向轴承55及止推轴承58之間摩擦係數減至 "小’得到平順的旋轉。 此:者:徑向轴承55為藉由有多孔質地的燒結金屬形成。 推軸承58為藉由不_鋼等的金屬形成。 有關本發明的軸承單元3 0係 止推鉦 ,、徑向軸承55的一端表面及 軸承5 8之間’設有環狀 徑,1 ^ W間隔65。間隔構件65的内 為权疋比形成於軸體51的— 微大。fl Μ π 鸲部的突出片54的外徑稍 大間隔構件65的外周面被 邊。兮Ρ1隔播从 固疋正外威56的外周面這 该間Ik構件65具有下述之功能。 在如圖6所示有關本發 乃幻袖承單元3〇,與. 出片54的徑向軸承55的一嫂;早 ”釉體51的犬 面對向的面和徑向軸承5 5的 〜端表面之間的空隙C 、男命咖 Π釉承55的 1及與突出片54的止推軸承58對向 的面和止推軸承58之間的空 、 声 .? , ,, '、C2 ’有必要維持極高的精 人。例如,破使用在前述磁 、去 ^ 卡械驅動裝置1所用沾rir紅禺 建4的軸承單元3 β用的主轴馬 仵且軸體51的穩定旋轉,有必要維 -19. 1279062The third dynamic pressure generating portion groove 64 is formed at a time when the connecting groove 64b is continuously formed as a herringbone groove, and the distal end of the V-shaped pair of grooves 64a is formed. The direction of rotation Ri of the body 51 is formed. The dynamic pressure generating portion grooves 61 to 64 of any one of the first to third embodiments are supported by the shaft body 5 1 , the second bearing 55 and the thrust bearing 58 to continuously rotate in the outer casing 56. The flow of the lubricating oil 67 which is filled with the viscous fluid filled in the outer casing 56 causes dynamic pressure between the shaft body 51, the radial bearing 55 and the thrust bearing 58. The support of the body 51. That is, the radial bearing 55 and the bearing function as a dynamic/force fluid bearing. The moving pole i generated by the rotation of the shaft 51 reduces the friction coefficient between the # bearing 55 and the thrust bearing 58 to "Small" gives a smooth rotation. This: The radial bearing 55 is formed of a sintered metal having a porous texture. The thrust bearing 58 is formed of a metal such as steel. The bearing unit 30 of the present invention The thrust is pushed, and the end surface of the radial bearing 55 and the bearing 58 are provided with an annular diameter, 1 ^ W interval 65. The inside of the spacer member 65 is a weight ratio formed in the shaft 51 - The outer diameter of the protruding piece 54 of the Μ π 鸲 portion is slightly larger than the outer peripheral surface of the spacer member 65. The I1 is slid from the outer peripheral surface of the yoke yoke 56, and the Ik member 65 has the following function. In the case of the present invention, as shown in Fig. 6, the imaginary sleeve unit 3〇, and the radial bearing 55 of the sheet 54; the early face of the glaze 51 and the radial bearing 5 5 The gap C between the end surfaces, the 1 of the male glaze glaze 55, and the face opposite the thrust bearing 58 of the protruding piece 54 and the thrust bearing 58 Empty, sound .? , ,, ', C2 ‘It is necessary to maintain a very high level of precision. For example, it is necessary to break the spindle of the bearing unit 3 β used in the magnetic and de-mechanical driving device 1 and the shaft 51 is stably rotated, and it is necessary to maintain the dimension -19. 1279062
(15) 持各空隙C1、C2在數μηι的精度。一旦這些精度太大,在第 1至第3中任一項的動壓力產生部溝槽6 1〜6 4不僅無法充分 传到動壓力的效果,由於這些的空隙量變成不均等,輪發 51旋轉時的振擺就明顯著地變成非常大。 因此’在有關本發明的轴承單元30,如圖5及圖6所示, 藉由將間隔構件6 5配置於設在軸體5 1的突出片5 4的周 圍’減小突出片54的外周面附近的空隙,藉此減小由於執 體5 1旋轉之際潤滑油67的移動所產生的不安定,而可得到 軸體5 1穩定的旋轉。 在圖55及圖6所示有關本發明的軸承單元3〇,藉由將間陽 構件65配置於突出片54的外周圍,可維持與軸體51的突出 片54的徑向軸承55的一端面對向的面和徑向軸承”的〜 端表面之間的空隙Ci、及與突出片54的止推軸承58對向的 面和止推軸承58之間的空隙C2各別在數4111的精度。 藉由如此地設置間隔構件65,於設在徑向軸承55的第之 動壓力產生部溝槽63及設在止推軸承58的第3動壓力產生 部溝槽64,充填於外殼56的潤滑油”均勻地流通,且可充 分得到在第2動壓力產生部溝槽63及第3動壓力產生部溝 槽64所形成部分的動壓力產生欵果。而且,由於與軸體y 的突出片54的徑向軸承55的一端面對向的面和徑向軸承 55的一端表面之間的空隙Cl、及與突出片54的止推軸承u 對向的面和止推軸承58之間的空隙^變成一樣,可減小轴 體51旋轉時的振擺。由此,因為可高度提高對於軸體”的 外殼5 6的轴方向的相對位置的精度,所以能夠延長軸承單 -20, 1279062(15) The accuracy of the number of gaps C1 and C2 is several μηι. When the accuracy is too large, the dynamic pressure generating portion grooves 6 1 to 6 4 of any of the first to third embodiments are not able to sufficiently transmit the effect of the dynamic pressure, and since the amount of the gap becomes uneven, the rotation 51 The wobble at the time of rotation becomes significantly large. Therefore, in the bearing unit 30 according to the present invention, as shown in Figs. 5 and 6, the spacer member 65 is disposed around the protruding piece 5 4 provided on the shaft body 51 to reduce the outer circumference of the protruding piece 54. The gap near the surface, thereby reducing the instability caused by the movement of the lubricating oil 67 when the body 51 is rotated, can obtain stable rotation of the shaft 51. In the bearing unit 3 of the present invention shown in Figs. 55 and 6, by arranging the male member 65 around the outer periphery of the protruding piece 54, the one end of the radial bearing 55 of the protruding piece 54 of the shaft body 51 can be maintained. The gap Ci between the end surface of the facing surface and the radial bearing", and the gap C2 between the surface facing the thrust bearing 58 of the protruding piece 54 and the thrust bearing 58 are each 4111. In this way, the spacer member 65 is provided, and the first dynamic pressure generating portion groove 63 provided in the radial bearing 55 and the third dynamic pressure generating portion groove 64 provided in the thrust bearing 58 are filled in the outer casing 56. The lubricating oil is uniformly distributed, and the dynamic pressure generation effect in the portion formed by the second dynamic pressure generating portion groove 63 and the third dynamic pressure generating portion groove 64 can be sufficiently obtained. Further, due to the gap C1 between the surface facing the one end of the radial bearing 55 of the protruding piece 54 of the shaft body y and the one end surface of the radial bearing 55, and the thrust bearing u of the protruding piece 54 The gap ^ between the face and the thrust bearing 58 becomes the same, and the wobble at the time of rotation of the shaft 51 can be reduced. Thereby, since the accuracy of the relative position in the axial direction of the outer casing 56 of the shaft body can be highly improved, the bearing unit -20, 1279062 can be extended.
(16) 元30及使用該軸承單元3〇之主軸馬達4的壽命而提高信賴 性。 構成圖5及圖6所示的軸承單元3〇的外殼%,其包含成為 筒狀的外殼本體71、構成封閉外殼本體71的一端且與外殼 本體7 1 —體形成一端部部分的底部封閉部72、及與構成外 殼本體71的另外一端這邊的外殼本體71一體形成的上部 封閉部73。在上部封閉部73的中央部分,設有通過收藏於 外殼56的徑向軸承55及止推軸承58旋轉無拘束地被支撐 的軸體5 1的軸部所插通的軸插通孔7 5。 如上邊所構成的外殼56,藉由包住依序地使重疊重合被 堆疊起來的徑向軸承55、間隔構件65及止推軸承58而外塑 成形成樹脂材料,如圖6所示,將徑向軸承55配置於外殼 本體7丨的内圍這邊,於外殼本體71的底部使止推軸承“定 位,使間隔構件6 5介於徑向軸承5 5與止推軸承5 8之間而整 體地形成。此時,軸體5 i也事先使軸部5 3插通圓筒狀的徑 向轴承5 5,在被徑向細系$ ς访 孕由承5 5與止推軸承5 8支撐狀態下的被 組合。轴體51被組合於一體形成的外殼56之際,使設於一 端的突出片54對向止推軸承58,使設於另一端的組裝部52 這邊由設於外殼本體71的上部封閉部73的轴插通孔乃突 出。 如此地’在内包徑向軸承55、^隔構件65及止推軸承 5 8且支撐軸體5 1而破一體形成的外殼5 6,軸體5丨旋轉 時,流通在第1至H 3 Φ k 第中任一條的動壓力產生溝槽61至64中 任一條溝槽内作為使產生動壓力的黏性流體的潤滑油67 • 21 - 1279062(16) Element 30 and the life of the spindle motor 4 using the bearing unit 3〇 improve reliability. The outer casing % constituting the bearing unit 3A shown in Figs. 5 and 6 includes a cylindrical outer casing main body 71, a bottom closed portion constituting one end of the closed outer casing main body 71 and integrally forming an end portion with the outer casing main body 7 1 . 72. An upper closing portion 73 integrally formed with the casing body 71 constituting the other end of the casing body 71. In the central portion of the upper closing portion 73, a shaft insertion hole 7 through which the shaft portion of the shaft body 51 that is supported by the radial bearing 55 and the thrust bearing 58 stored in the outer casing 56 is inserted without being restrained is provided. . The outer casing 56 formed as above is externally molded to form a resin material by enclosing the radial bearing 55, the spacer member 65 and the thrust bearing 58 which are stacked in this order, as shown in FIG. The radial bearing 55 is disposed on the inner circumference of the casing body 7丨, and the thrust bearing is “positioned at the bottom of the casing body 71 such that the spacing member 65 is interposed between the radial bearing 55 and the thrust bearing 58. In this case, the shaft body 5 i also inserts the shaft portion 5 3 into the cylindrical radial bearing 5 5 in advance, and is radially connected to the bearing 5 5 and the thrust bearing 5 8 . When the shaft body 51 is combined with the integrally formed outer casing 56, the protruding piece 54 provided at one end faces the thrust bearing 58, and the assembly part 52 provided at the other end is provided by The shaft insertion hole of the upper closing portion 73 of the outer casing body 71 is protruded. Thus, the outer casing 56 is integrally formed by enclosing the radial bearing 55, the partition member 65, and the thrust bearing 58 and supporting the shaft body 51. When the shaft body 5 turns, it flows in any one of the dynamic pressure generating grooves 61 to 64 of any one of the first to H 3 Φ k Lubricating oil as a viscous fluid that generates dynamic pressure 67 • 21 - 1279062
(17) 被充填。 潤滑油67的充填係將在潤滑油67所收藏的充填槽將插 入軸體51的外殼56投進。隨後,將外殼56所投進的充填槽 藉由真空設備真空抽取。之後,藉由將被真空抽取的充 槽在大氣中取出,且潤滑油6 7在外殼5 6内被充填。 、(17) Filled. The filling of the lubricating oil 67 is to be inserted into the outer casing 56 of the shaft body 51 in the filling groove in which the lubricating oil 67 is stored. Subsequently, the filling tank into which the outer casing 56 is thrown is vacuum-extracted by a vacuum apparatus. Thereafter, the vacuum-extracted charging tank is taken out in the atmosphere, and the lubricating oil 67 is filled in the outer casing 56. ,
此時,潤滑油67 ,係由於溫度變化膨漲的時候,防止由 軸插通孔75内洩露至外殼56的外部,且由於溫度變化收縮 的時候,並不發生在軸體51與軸插通孔75之間形成的空隙 79的充填不足。亦即,由於溫度變化的潤滑油叨的油表面 高度的i化’被設定在軸插通孔7 5内的範圍。 將對潤滑油67的外殼56的充填使用真空設備進行真* 抽取’外殼56的内部的壓力成為比外部低的狀態。其Z 果,潤滑油6 7容易地防止由外殼5 6茂露。At this time, when the lubricating oil 67 is swollen due to temperature change, it is prevented from leaking into the outside of the casing 56 through the shaft insertion hole 75, and when the temperature is contracted, the shaft body 51 and the shaft are not inserted. The filling of the gap 79 formed between the holes 75 is insufficient. That is, the height i of the oil surface of the lubricating oil crucible due to the temperature change is set within the range of the shaft insertion hole 75. The filling of the outer casing 56 of the lubricating oil 67 is performed by using a vacuum apparatus. The pressure inside the outer casing 56 is lower than the outside. Its Z, the lubricating oil 6 7 is easily prevented from being exposed by the outer casing 56.
有關本發明的軸承單元3 0,係藉由以燒結金屬形成徑向 軸承55,潤滑油67被浸透在該徑向軸承55,再者藉由轴體 51的的旋轉,在使產生動壓力的第1至第3中任一條的動壓 力產生溝槽61至64中任一條溝槽内也潤滑油67被充填。亦 即,潤滑油67被充填至外殼5 6内的全部空隙。 再者,構成外殼5 6的合成樹脂材料,雖並無特別限定, 然而希望使用將對於不沾於外殼56内充填的潤滑油67的 潤滑油67的接觸角加大的材料。因此,外殼56,理想的為 使用聚亞烯胺(Polyimide)、聚醯胺(polyamide)、聚乙縮醛 (polyacetal)等的氟化乙烯合成樹脂來形成。再者,使用聚 碳酸酯(pc)、丙烯、丁二烯、苯乙烯的共聚物(ABS)等的 •22- 1279062The bearing unit 30 of the present invention is formed by forming a radial bearing 55 with a sintered metal, the lubricating oil 67 is saturated with the radial bearing 55, and by the rotation of the shaft 51, dynamic pressure is generated. The lubricating oil 67 is also filled in any one of the dynamic pressure generating grooves 61 to 64 of any of the first to third. That is, the lubricating oil 67 is filled into all the spaces in the outer casing 56. Further, the synthetic resin material constituting the outer casing 56 is not particularly limited, but it is desirable to use a material which increases the contact angle of the lubricating oil 67 which does not adhere to the lubricating oil 67 filled in the outer casing 56. Therefore, the outer casing 56 is preferably formed using a fluorinated ethylene synthetic resin such as polyimide, polyamide, or polyacetal. Further, the use of polycarbonate (pc), propylene, butadiene, styrene copolymer (ABS), etc. • 22-1279062
合成樹脂也可以。除此之外,非常高精度的成形為藉由可 液晶聚合物而形成。 可是,於外殼5 6的上部封閉部73形成的軸插通孔,為 ***通於該軸插通孔7 5的軸體5 1的軸部5 3並不在軸插通 孔75内周面接觸而旋轉,具有比軸部53的外徑稍微大的内 徑而被形成。此時,軸插通孔75如圖6及圖10所示,具有 足夠防止於其内周面與軸部53外周面之間在外殼56内所 充填的潤滑油67由外殼56内的洩露的間隔^的空隙”而 被形成。如此地,防止在與軸體5丨之間在外殼5 6内所充填 的潤滑ά 67的洩露的空隙79被形成而形成軸插通孔乃的 上部封閉部73構成油封部。 1 你四句稽田聚亞 烯胺㈣yimide)、聚酿胺(polyamide)、或尼龍等的合 脂形成’故能確保對軸插通孔75的潤滑油π内周面 角在大約6G度。有關本發明的軸承單元係包含構成: =軸插通孔75的内周面,於上部封閉部73,因為並不 :抹界…劑可…潤滑油67的上部封閉部 角,所以可防止藉由由於軸體”的 油67經過軸插通孔75向外殼56的外部二生的離…滑 再者,在與軸體51的軸插通孔7 ° 面,設有錐形部77。錐形部77 體二=的外周 插通孔”的内周面之間形成❹二體51的外周面與轴 大而傾斜。該錐形部77,為於藉:外威56的外面擴 通孔75的内周面所形成 51的外周面與輪插 肜成壓力錐度,且產生將 -23- 1279062Synthetic resins are also available. In addition to this, very high precision forming is formed by a liquid crystal polymer. However, the shaft insertion hole formed in the upper closing portion 73 of the outer casing 56 is the shaft portion 53 of the shaft body 51 that is inserted through the shaft insertion hole 75, and is not in the inner circumferential surface of the shaft insertion hole 75. It is formed by rotating and contacting and having an inner diameter slightly larger than the outer diameter of the shaft portion 53. At this time, as shown in FIGS. 6 and 10, the shaft insertion hole 75 has a function of preventing leakage of the lubricating oil 67 filled in the outer casing 56 between the inner circumferential surface and the outer circumferential surface of the shaft portion 53 from the outer casing 56. In this way, a gap 79 for preventing leakage of the lubricating weir 67 filled in the outer casing 56 between the shaft body 5 and 6 is formed to form an upper closing portion of the shaft insertion hole. 73. The oil seal is formed. 1 You can form a mixture of four yimide polyamines, polyamides, or nylons, so that the inner circumferential angle of the lubricating oil π to the shaft insertion hole 75 is approximately 6G degrees. The bearing unit according to the present invention comprises: an inner peripheral surface of the = shaft insertion hole 75, and is not in the upper closing portion 73, because the upper portion of the lubricating oil 67 is closed, so It is possible to prevent the oil 67 from the shaft body from sliding through the shaft insertion hole 75 to the outside of the outer casing 56, and to provide a taper portion on the side of the shaft insertion hole 7 of the shaft body 51. 77. The outer peripheral surface of the crucible body 51 formed between the inner peripheral surfaces of the tapered portion 77 and the outer peripheral insertion hole of the body 2 is inclined to be larger than the axis. The tapered portion 77 is expanded outside the outer wall 56. The outer peripheral surface of the inner peripheral surface of the hole 75 is formed into a pressure taper with the wheel, and the resulting -23-1284962
於外殼5 6内所充填沾、nB 的潤滑油67拉進外殼56的内部的力 量。軸體5 1旋轉的時备 4、n、 、’因為潤滑油變成被拉進外殼5 6的 内部,故在設於藉由壬,产 動壓力流體軸承所構成的徑向軸承 55及止推軸承58的第^ 1至第3中任一條的動壓力產生溝槽 6 1至6 4中任一條溝捧 僧,潤滑油67確實滲入而使產生動壓 力,實現軸體5 1的穩定 又的支撐,而且可防止充填在外殼56 的潤滑油6 7的洩漏。The amount of force in which the lubricating oil 67 of the nB is filled into the outer casing 56 is filled in the outer casing 56. When the shaft 5 1 rotates, the timings 4, n, and 'because the lubricating oil is drawn into the inside of the outer casing 56, the radial bearing 55 and the thrust which are formed by the pressure fluid bearing are provided by the weir. The dynamic pressure of any one of the first to third of the bearing 58 generates any one of the grooves 6 1 to 64, and the lubricating oil 67 does infiltrate to generate dynamic pressure, thereby realizing the stability of the shaft body 51. The support is also prevented from leaking the lubricating oil 67 filled in the outer casing 56.
在有關本發明的車由承留-α n x ^ _ % 來皁兀*30,滲入於第1至第3中任一項 的動壓力產生溝槽61至64中任一條溝槽而使產生動壓力In the vehicle relating to the present invention, the saponin*30 is retained by the retention-α nx ^ _ %, and the dynamic pressure generating grooves 61 to 64 of any one of the first to third embodiments are infiltrated to generate a motion. pressure
I 的潤滑油6 7,如圖6及圖1 〇所示,為面臨藉由從外殼5 6内 於軸體5 1形成的錐形部7 7和軸插通孔7 5的内周面所形成 的空隙79而被充填。亦即,满滑油67被充填於外殼56内的 間隙’進而被浸透於由燒結金屬所成的從向轴承5 5。The lubricating oil 6 7 of I is as shown in Fig. 6 and Fig. 1 and is faced with the inner peripheral surface of the tapered portion 7 7 and the shaft insertion hole 7 5 formed by the outer casing 56 from the shaft body 51. The formed voids 79 are filled. That is, the full lubricating oil 67 is filled in the gap 'in the outer casing 56' and is further impregnated into the bearing 55 formed of sintered metal.
因此,就有關於軸體5 1形成的錐形部7 7與軸插通孔7 5的 内周面之間所形成的空隙79來說明。該空隙79的最小的間 隔,相當於軸體5 1的外周面與軸插通孔7 5的内周面之間所 形成的間隔C3,該間隔C3希望在20 〜200 Km,100 μιη 左右最令人滿意。間隔C3比20 μΠ1小的話,難確保將軸承 單元30的外殼56藉由合成樹脂以一體成形製造時的成形 精度。空隙79的間隔C3比200 μηι大的話’施加衝擊於軸承 單元3 0的時候,被充填於外殼5 6的潤滑油6 7飛散在外殼5 6 的外部而降低耐衝擊性。 被充填於外殼5 6的潤滑油6 7由於衝擊飛散在外殼5 6時 關於耐衝擊性G的話,如下列的式子(1)所示’以 -24- 1279062 (20) (1) G = (12 γ c o s/3 / 2 p c 2) / g 表示。 在此,7 : 潤 滑 油 的 表 面 張 力 β : 潤 滑 油 的 接 觸 角 Ρ ·· 潤 滑 油 的 密 度 C : 旋 轉 軸 與 車由 插 通 孔之間的間隔 g ·· 自 由 落 體 加 速 度 根 據式 子⑴, 耐 衝擊性G係與 空隙 79的 間 隔c的2次方成 反 比 0 此 \ 外, 由於熱 膨 脹的油面 上昇 量h y 如 下列的式子(2)所 示 , 以 h = =V a Δί/2 π Rc (2) 表 示 0 在 此, V 潤滑油 填充 量 a 熱膨脹 係數 At 溫度變 化量 R 軸半徑 根 據式 子⑺, 因 為油面上 昇量 h與 間 隔 c的 大小成反比, 故 如 將間 隔c作窄, 雖然耐衝擊G提高 y 但 由 於溫度的上昇 的 潤 滑油 6 7的油 表 面高度h的上 昇變 成 激 烈 ,軸插通孔7 5 的 軸 方向 的厚度 就 成為必需 0 如 果根 據計算 , 在支撐具 有直 徑2 π im〜3 m m的軸徑的 軸 部 53的 軸體51 的 軸承單元 30, 將軸 部 53與 軸插通孔7 5之 -25- (21) 1279062 間所形成的空隙79的間隔c 31卞马1 00 μηι左右,轴插通孔75 的高度1為1 mm程度的話,l w通’耐衝擊性為1000G以上,耐溫 度特性可耐至8 0 〇C,且可槿士、〜,> 士 , 得成防止充填於外喊5 6内的潤滑 油67的飛散的高信賴性之軸承單元3〇。 再者’有關本發明的軸承| — 平田取早το 30,因為設有將軸體51的 外周面與軸插通孔75的内罔工 n席面之間形成的空隙79的間隔 C3向外殼5 6的外面擴大而傾 1貝斜的錐形部77,故在藉由軸體 5 1的外周面與軸插通孔7 5沾 的内周面之間形成的空隙7 9的 間隔C3形成壓力錐度,且麩 精由軸體5 1旋轉之時產生的離心 力’產生將充填於外殼5 6内的 的潤滑油6 7拉進至外殼5 6内部 的力量。 承單元30,軸艇的y卜周g 軸插通孔7 5的内周面之間开彡 心成的空隙79,係藉由表面発 封緘,防止潤滑油67的飛散。 其次,參照圖11及圖12說 〇 — d有關本發明的其他例子¥ 承早7〇 〇 、Therefore, there will be described a gap 79 formed between the tapered portion 7 7 formed by the shaft body 51 and the inner peripheral surface of the shaft insertion hole 7 5 . The minimum interval of the gap 79 corresponds to the interval C3 formed between the outer peripheral surface of the shaft body 51 and the inner peripheral surface of the shaft insertion hole 75, and the interval C3 is desirably about 20 to 200 Km and 100 μm or so. Satisfactory. When the interval C3 is smaller than 20 μΠ1, it is difficult to ensure the molding precision when the outer casing 56 of the bearing unit 30 is integrally molded by synthetic resin. When the interval C3 of the gap 79 is larger than 200 μη, when the impact is applied to the bearing unit 30, the lubricating oil 6 7 filled in the outer casing 56 is scattered outside the outer casing 56 to reduce the impact resistance. The lubricating oil 6 7 filled in the outer casing 56 is shock-resistant as it is scattered on the outer casing 56, as shown by the following formula (1) '-24 - 1279062 (20) (1) G = (12 γ cos/3 / 2 pc 2) / g. Here, 7 : surface tension of lubricating oil β : contact angle of lubricating oil Ρ · · density of lubricating oil C : interval between rotating shaft and the insertion hole of the vehicle g · · free falling acceleration according to formula (1), resistant The impact G is inversely proportional to the square of the interval c of the gap 79. The amount of oil surface rise hy due to thermal expansion is as shown in the following formula (2), and h = = V a Δί/2 π Rc (2) means 0 Here, V Lubricating oil filling amount a Thermal expansion coefficient At Temperature change amount R Shaft radius according to the formula (7), because the oil level rising amount h is inversely proportional to the size of the interval c, so the interval c is narrowed. Though the impact resistance G is increased by y, the increase in the oil surface height h of the lubricating oil 6 7 due to the rise in temperature becomes intense, and the thickness of the shaft insertion hole 7 5 in the axial direction becomes necessary. 2 π im~3 mm shaft diameter shaft portion 53 shaft body 5 In the bearing unit 30 of the bearing unit 30, the interval c 31 of the gap 79 formed between the shaft portion 53 and the shaft insertion hole 7 -25 - (21) 1279062 is about 1 00 μηι, and the height of the shaft insertion hole 75 is 1 For the degree of 1 mm, lw pass's impact resistance is 1000G or more, and the temperature resistance can withstand up to 80 〇C, and it can be gentleman, ~, gt, and it can be used to prevent lubrication from being filled in outside. The high-reliability bearing unit of the oil 67 is 3〇. Further, the bearing of the present invention is taken as an outer casing το 30, because the space C3 of the gap 79 formed between the outer peripheral surface of the shaft body 51 and the inner surface of the shaft insertion hole 75 is provided to the outer casing. The outer portion of the outer surface of the rib 5 is enlarged and inclined by a tapered portion 77. Therefore, the space C3 formed by the gap 7 9 formed between the outer peripheral surface of the shaft body 51 and the inner peripheral surface of the shaft insertion hole 75 is formed. The pressure taper, and the centrifugal force generated when the bran is rotated by the shaft 51, produces a force that pulls the lubricating oil 67 filled in the outer casing 56 into the interior of the outer casing 56. The receiving unit 30, the gap 79 between the inner peripheral surfaces of the shaft y, the inner peripheral surface of the shaft, and the inner peripheral surface of the shaft yoke are sealed by the surface 缄 to prevent the lubricating oil 67 from scattering. Next, referring to FIG. 11 and FIG. 12, 〇-d relates to other examples of the present invention.
於圖11及圖12所示的軸承 b ,,.. 兀8 〇,係藉由將外殼8 6更 易地外塑成形而可形成的。 再者,於圖11及圖12所示的 6>, %輪承單元80,在與前述$ 6的軸承單元3 0共同的部分, 的% 付予共同的符號而省略詞 如圖11所示所構成的軸承 傷局部裝配9 0。該局部裝配 止推軸承5 8及間隔構件8 1。 單元8〇,如圖12所示,預先準 9 0具有軸體5 1、徑向軸承5 5、 ^隔構件8丨係將圓筒部82及環 '26. (22) Ϊ279062 、套筒83—體構成的。環狀套筒83,係在圓筒部82的内周 面’朝車由體51的突出片54的外周面突出在全周形成。 如圖1 2所示,準備將軸體5 1、徑向軸承5 5、間隔構件8丨 _ 及軸向軸承58預先作為局部裝配9〇而暫時支撐裝配的東 ♦ ^對於該局部裝配90,如圖11所示,將外殼86以合成樹 曰外塑成形。如此地藉由預先準備局部裝配9〇,可更容易 土也進行外殼8 6的外塑成形。 其人,參照圖1 3說明有關本發明的另外其他例子的軸承 φ TO 一丁 :疋。今該軸承單元91,在與前述的圖6的軸承單元3〇共 同的。卩分,付予共同的符號而省略詳細的說明。在與圖6 所不的軸承單元30不同點為下述幾點。亦即,徑向軸承94 ^間隔構件95為一體形成。如此地,藉由徑向軸承94及間 隔構件95為一體地形成,可減少零件數量而達到降低成 〇 參照圖14說明有關本發明的另外其他例子之軸承單 疋。於該軸承單元101,在與前述的圖6的軸承單元3〇共同 塌 的部分’付予共同的符號而省略詳細的說明。在與圖6所 示的軸承單元3〇不同點為:在間隔構件1〇2的一部份嵌合 於設於外殼5 6的貫穿孔1 〇3而面臨外殼5 6外部的突出部 104被設立。如此地,間隔構件1〇2藉由在貫穿孔ι〇3嵌合 突出部1〇4而被固定於外殼56,對外殼56可確實地固定。 可是,作為外殼56的成形材料所使用的聚亞烯胺、聚醯 胺、或尼龍等的合成樹脂,對於金屬藉由黏著的連結並不 充分。有關本發明的軸承單元,係於最外圍合成樹脂製的 -27- 1279062The bearings b,, . . . , 8 〇 shown in FIGS. 11 and 12 can be formed by externally molding the outer casing 86. Further, in the 6> shown in Figs. 11 and 12, the % bearing unit 80 is given a common symbol in the portion common to the bearing unit 30 of the above-mentioned $6, and the omitted words are as shown in Fig. 11. The resulting bearing injury is partially assembled 90. This partially assembles the thrust bearing 58 and the spacer member 81. The unit 8A, as shown in Fig. 12, has a shaft body 5 1 , a radial bearing 5 5 , a partition member 8 , a cylindrical portion 82 and a ring '26. (22) Ϊ 279062, a sleeve 83 - Body composition. The annular sleeve 83 is formed on the inner peripheral surface of the cylindrical portion 82 so as to protrude toward the outer peripheral surface of the protruding piece 54 of the vehicle body 51 over the entire circumference. As shown in FIG. 12, the shaft body 51, the radial bearing 55, the spacer member 8丨, and the axial bearing 58 are prepared to be temporarily assembled as a partial assembly 9 ^ for the partial assembly 90, As shown in Fig. 11, the outer casing 86 is plastically molded in a synthetic tree. By thus preparing the partial assembly 9 in advance, the outer molding of the outer casing 86 can be performed more easily. Others, a bearing φ TO 疋 : 疋 according to still another example of the present invention will be described with reference to FIG. The bearing unit 91 is now common to the bearing unit 3 of Fig. 6 described above. The details are given and the detailed description is omitted. The difference from the bearing unit 30 shown in Fig. 6 is as follows. That is, the radial bearing 94^ spacer member 95 is integrally formed. As described above, the radial bearing 94 and the spacer member 95 are integrally formed, and the number of parts can be reduced to achieve a reduction. Referring to Fig. 14, a bearing unit according to still another example of the present invention will be described. In the bearing unit 101, the same portions as those of the bearing unit 3 of Fig. 6 described above are given the same reference numerals, and detailed description thereof will be omitted. The difference from the bearing unit 3 shown in FIG. 6 is that a portion of the spacer member 1〇2 is fitted to the through hole 1 〇3 provided in the outer casing 56 and the protruding portion 104 facing the outside of the outer casing 56 is set up. In this manner, the spacer member 1〇2 is fixed to the outer casing 56 by fitting the protruding portion 1〇4 to the through-hole 〇3, and the outer casing 56 can be surely fixed. However, a synthetic resin such as polyalkyleneamine, polyamine, or nylon used as a molding material for the outer casing 56 is not sufficiently bonded to the metal by adhesion. The bearing unit according to the present invention is made of synthetic resin -27-1279062
(23) 外殼5 6定位,將該合成樹脂製造的外殼5 6嵌合於金屬製的 圓筒部2 8而固定。因此,無法使用黏著劑將外殼5 6確實地 結合於金屬製的圓筒部28。(23) The outer casing 56 is positioned, and the outer casing 56 made of synthetic resin is fitted to the cylindrical portion 28 made of metal and fixed. Therefore, the outer casing 56 cannot be surely bonded to the cylindrical portion 28 made of metal by using an adhesive.
另一方面,在外殼5 6内被配設的間隔構件1 0 2係以例如 鐵、黃銅、鋁等的金屬形成。因此,在由金屬形成的間隔 構件1 02的一部份設置突出部1 04,藉由使該突出部1 04面 臨外殼5 6的外部,可得到外殼5 6與圓筒部2 8的結合表面變 成金屬同類部分,可使用黏著劑將外殼56確實地結合於金 屬製的圓筒部2 8。 i 再者,設於間隔構件1 02的突出部1 04,如圖1 5所示,也 可設成多數。如此地藉由設置面臨外殼5 6外部的金屬製的 突出部104,接觸於屬製的突出部104的金屬製部分的面積 變大,變成更能夠使用黏著劑將外殼5 6確實地結合於金屬 製的圓筒部2 8。On the other hand, the spacer member 10 2 disposed in the outer casing 56 is formed of a metal such as iron, brass, or aluminum. Therefore, a projection portion 104 is provided in a portion of the spacer member 102 formed of metal, and by engaging the projection portion 104 with the outer portion of the outer casing 56, the bonding surface of the outer casing 56 and the cylindrical portion 28 can be obtained. By changing to the metal-like portion, the outer casing 56 can be surely bonded to the cylindrical portion 28 made of metal using an adhesive. Further, the protruding portion 104 provided in the spacer member 102 may be provided in a plurality as shown in Fig. 15. By providing the protruding portion 104 made of metal facing the outside of the outer casing 56, the area of the metal portion contacting the protruding portion 104 becomes large, and the outer casing 56 can be surely bonded to the metal using the adhesive. The cylindrical portion 28 is made.
參照圖1 6及圖1 7說明有關本發明的另外其他例子的軸 承單元。再者,在該例子也是在與前述的圖6的軸承單元 3 0共同的部分,付予共同的符號而省略詳細的說明。 如圖16所示構成的軸承單元110,於外殼56的内圍這邊 將間隔構件11 1 一體形成。在製作如此的軸承單元1 1 〇,如 圖1 7 A所示,係在第1樹脂成形工序對於軸承5 5藉由外塑成 形,成形含上部封閉部73的外殼本體7 1。此時,將間隔構 件11 1與外殼5 6 —體形成。 其次,如圖1 7B所示,在被外殼本體7 1收藏而被組裝的 徑向軸承5 5插通軸體5 1,對向軸體5 1的突出部5 4而配置軸 -28- 1279062A bearing unit relating to still another example of the present invention will be described with reference to Figs. 16 and 17. In this example, the same components as those of the bearing unit 30 of Fig. 6 described above are given the same reference numerals, and detailed description thereof will be omitted. The bearing unit 110 constructed as shown in Fig. 16 integrally forms the spacer member 11 1 on the inner circumference of the outer casing 56. In the production of such a bearing unit 1 1 〇, as shown in Fig. 17A, the outer casing main body 71 including the upper closing portion 73 is formed by external molding of the bearing 55 in the first resin forming step. At this time, the spacer member 11 1 is formed integrally with the outer casing 56. Next, as shown in Fig. 17B, the radial bearing 5 5 assembled by the casing body 7 1 is inserted through the shaft body 5, and the shaft -28-1279062 is disposed on the protruding portion 5 of the opposite shaft body 51.
(24) 承5 8 ’於止推軸承5 8所配置的外殼本體7 1底部這邊給予合 成樹脂材料外塑成形,且形成具有封閉外殼本體7 1底部這 邊的底部封閉部7 2,藉由如此的成形工序,可容易地生產 , 零件數量少且信賴性高的動壓力流體軸承單元。 再者’於外殼本體7 1底部這邊外塑被成形而構成底部封 ’ 閉部72的合成樹脂材料,係使用比構成外殼本體7丨的合成 樹脂的财熱溫度低溫度而能夠成形的材料。藉由使用如此 的材料’並不影響事先成形的外殼本體71的成形精度,可 鲁 形成將底部封閉部72與外殼本體71 一體化的外殼56。 使用士關本發明的軸承單元及該軸承單元的馬達,係將 徑向轴承、止推軸承及軸體,還有間隔構件使用合成樹脂 而收藏於一體形成的外殼,而且,軸體51,如圖1〇所示, 因為經由具有足夠防止由作為充填於外殼56的黏性流體 的潤滑油67的外殼56的洩露的間隔C3的空隙79而突出外 殼5 6的外部’故可確實地防止由充填於外殼5 6的潤滑油 67的外殼56的洩露。 φ 因為可防止由充填於外殼56的潤滑油67的外殼56的洩 露,故可使潤滑油67於構成動壓力產生部的第1至第3中任 一條的動廢力產生溝槽61至64中任一條溝槽流通。然後, 有關本發明的軸承單元,如圖6所示,因為與軸體5 i的突 出片54的徑向軸承5 5的一端面對向的面和徑向軸承5 5的 . 一端表面之間的空隙C i及與突出片5 4的止推轴承5 8對向 的面和止推軸承5 8之間的空隙c2,可維持極高的精度;因 為並無使產生偏心可達到穩定的狀態下軸體5丨的旋轉,故 -29- 1279062(24) The bottom of the outer casing body 7 1 disposed on the thrust bearing 58 is externally molded with a synthetic resin material, and a bottom closure portion 7 2 having a bottom portion of the closed casing body 7 1 is formed. According to such a forming process, a dynamic pressure fluid bearing unit having a small number of parts and high reliability can be easily produced. Further, the synthetic resin material which is molded to form the bottom seal 'closed portion 72 on the bottom side of the outer casing main body 7 1 is a material which can be formed by using a temperature lower than the temperature of the synthetic resin constituting the outer casing main body 7丨. . By using such a material ' does not affect the forming accuracy of the previously formed outer casing body 71, the outer casing 56 that integrates the bottom closing portion 72 with the outer casing body 71 can be formed. In the bearing unit of the present invention and the motor of the bearing unit, the radial bearing, the thrust bearing, and the shaft body, and the spacer member are housed in a integrally formed outer casing using synthetic resin, and the shaft body 51, such as As shown in FIG. 1A, since the outer portion of the outer casing 56 is protruded through the gap 79 having a space C3 sufficient to prevent leakage of the outer casing 56 as the lubricating oil 67 filled in the viscous fluid of the outer casing 56, it can be surely prevented by Leakage of the outer casing 56 of the lubricating oil 67 filled in the outer casing 56. φ Since the leakage of the outer casing 56 of the lubricating oil 67 filled in the outer casing 56 can be prevented, the lubricating oil 67 can be used to generate the grooves 61 to 64 in the first to third dynamics of the dynamic pressure generating portion. Any of the grooves circulate. Then, the bearing unit relating to the present invention, as shown in Fig. 6, is between the surface facing the one end of the radial bearing 55 of the projecting piece 54 of the shaft body 5 i and the one end surface of the radial bearing 55. The gap C i and the gap c2 between the surface facing the thrust bearing 58 of the protruding piece 5 4 and the thrust bearing 58 can maintain extremely high precision; since there is no eccentricity to achieve a stable state The rotation of the lower shaft 5丨, so -29- 1279062
使用於像硬碟機驅動設備那樣的資料存取設備變成有用。 有關本發明的軸承單元,因為可提昇旋轉的軸體51的突 出片54和從向轴承55及止推軸承58的各自之間的空隙 ;It is useful to use a data access device like a hard disk drive device. With regard to the bearing unit of the present invention, since the protruding piece 54 of the rotating shaft body 51 and the gap between the bearing 55 and the thrust bearing 58 can be raised;
Cl、C2的精度’藉由潤滑油67在動壓力產生部的第2及第3 動壓力產生溝槽63、64流通,可固定產生動壓力,且可得 車體的兩精度旋轉狀態。而且,因為於徑向轴承55也 y成’門⑺’由6 7 /危通的第1動壓力產生溝槽6 1、6 2,所以軸 體1成為藉由僅向方向及止推方向皆摩擦阻力小且負載馨 J的動,力〇,L體軸承來支樓的構造。如此地藉由動壓力流 體軸承乂撐的軸體5 1,因為負載極小,故可保證即使以高 速紋轉的時候為穩定的旋轉,而且可達到壽命等信賴性的 提昇。 口 、 上述的各軸承單元,因為將外殼5 6由合成樹脂形成,所 以外塑成形等為可行,i不需要組裝工序就可容易地維持 高精度而製造。The precision of Cl and C2 flows through the second and third dynamic pressure generating grooves 63 and 64 of the dynamic pressure generating portion, whereby the dynamic pressure can be fixed and the two-precision rotation state of the vehicle body can be obtained. Further, since the radial bearing 55 is also formed as a 'door (7)', the grooves 6 1 and 6 2 are generated by the first dynamic pressure of the danger, so that the shaft body 1 is made only by the direction and the thrust direction. The frictional resistance is small and the load of the singular J is strong, and the L-shaped bearing comes to the structure of the branch building. In this way, the shaft body 5 1 supported by the dynamic pressure fluid bearing is extremely small in load, so that stable rotation can be ensured even at a high speed, and reliability such as life can be improved. In the above-mentioned respective bearing units, since the outer casing 56 is formed of a synthetic resin, it is possible to perform molding or the like, and i can be easily manufactured with high precision without an assembly process.
再者,上述各軸承單元,因為可防止充填於外殼56的 滑油:7的外殼56的洩露、飛散,所以使用於儀碟機驅動 置之時’因為並無由於潤滑油污損硬碟機的 π 』蹲,所以 知到^賴性高的的磁碟機驅動設備。 可是’上述的軸體雖然將作為軸部及突出體的突出片 體形成,但也可以將軸部及突出片分開形成, ,, 〈傻冉一 化0 2下,參照圖18至圖20中任一項說明使用將輛部及突出 片分開形成的軸體的軸承單元的例子。 -30- 1279062 (26) 此外,在與前述的圖6的軸承單元30共同的部分,付予 共同的符號而省略詳細的說明。 使用於圖18所示的軸承單元300的軸體351,將直的形狀 的軸部3 53及圓盤狀的突出片354以另外構件形成。軸部 353由不銹鋼等的金屬形成。於軸部353,因為在外周面只 有錐形部所形成的直的形狀被形成,所以可進行無心研 磨。軸部3 5 3因為成為無心研磨可行的形狀,所以可維持 高精度的真圓度而容易地形成。 突出片3 54係於軸部3 5 3的一端這邊,將合成樹脂材料或 燒結金屬材料藉由外塑成形構成與軸部3 5 3 —體形成的軸 體 351。 再者,在突出片354所外塑成形的軸部353的一端這邊, 外塑成形的合成樹脂材料或燒結金屬材料要進入的結合 用溝槽部3 5 5被形成。藉由設置如此的結合用溝槽部3 5 5, 突出片354及軸部353被堅固地一體化。 在此所示的軸體351的突出片3 54,因為在後面的工序於 軸部3 5 3外塑成形而形成,成為能夠在此成形時形成動壓 力產生溝槽。亦即,可在與被收藏支撐於外殼5 6的徑向軸 承55的一端表面對向的面形成第2動壓力產生溝槽363,且 可在與止推軸本58面對的另一面形成第3動壓力產生溝槽 364。 突出片354—邊的面所形成的第2動壓力產生溝槽363, 係與上述徑向軸承55的一端表面所形成的第2動壓力產生 溝槽63—樣,如圖19所示,位於突出片354的外圍這邊, (27) · l279〇62 將成V字狀的一對溝槽3 63 a ^ U ^ | 乍為於周向藉由遠1、# Μ 363b連續地形成的人字形的滏 連接溝槽 厭丄 1、类祕, 糟而被形成。此時,筮9韌 壓力產生溝槽363為成v字狀 令,弟2動 朝軸體351的%轉方向心被形成。 員编k邊Furthermore, since each of the above-mentioned bearing units can prevent the leakage and scattering of the outer casing 56 of the oil: 7 filled in the outer casing 56, it is used when the disk drive is driven, because there is no lubricant contaminated by the hard disk. π 』 蹲, so I know the high-powered disk drive device. However, although the above-mentioned shaft body is formed as a protruding piece of the shaft portion and the protruding body, the shaft portion and the protruding piece may be formed separately, and the following may be referred to as FIG. 18 to FIG. Any of the examples of the bearing unit using the shaft body formed by separating the vehicle portion and the protruding piece. -30- 1279062 (26) In the same portions as those of the bearing unit 30 of Fig. 6 described above, the same reference numerals will be given to the same reference numerals, and the detailed description will be omitted. The shaft portion 353 of the straight shape and the disc-shaped protruding piece 354 of the bearing unit 300 shown in Fig. 18 are formed of separate members. The shaft portion 353 is formed of a metal such as stainless steel. Since the shaft portion 353 is formed in a straight shape formed by only the tapered portion on the outer peripheral surface, it is possible to perform centerless grinding. Since the shaft portion 3 5 3 has a shape that is unsatisfactory for centerless grinding, it can be easily formed while maintaining high precision roundness. The projecting piece 3 54 is attached to one end of the shaft portion 35, and the synthetic resin material or the sintered metal material is formed by external molding to form a shaft body 351 formed integrally with the shaft portion 35. Further, on one end of the shaft portion 353 which is formed by the outer surface of the protruding piece 354, a synthetic resin material or a groove portion 35 5 into which the sintered metal material is to be inserted is formed. By providing such a coupling groove portion 35 5 , the protruding piece 354 and the shaft portion 353 are firmly integrated. The protruding piece 3543 of the shaft body 351 shown here is formed by molding the outer portion of the shaft portion 353 in a later step, so that a dynamic pressure generating groove can be formed at the time of molding. That is, the second dynamic pressure generating groove 363 may be formed on a surface facing the one end surface of the radial bearing 55 supported by the outer casing 56, and may be formed on the other surface facing the thrust shaft 58. The third dynamic pressure creates a groove 364. The second dynamic pressure generating groove 363 formed by the surface of the protruding piece 354 is formed like the second dynamic pressure generating groove 63 formed on one end surface of the radial bearing 55, as shown in FIG. On the outer side of the protruding piece 354, (27) · l279〇62 will form a V-shaped pair of grooves 3 63 a ^ U ^ | 乍 as a person continuously formed by the distance 1, # Μ 363b in the circumferential direction The glyphs of the glyphs are sinuous, and the secrets are formed. At this time, the 筮9 toughness pressure generating groove 363 is formed into a v-shape, and the second direction of the shaft body 351 is formed. K-side
此外,在與突出片3 54的止拖 ^ 推軸承58對向的另一 % # A 的第3勳壓力產生溝槽364,也如 面形成Further, a groove 364 is formed at the third pressure of the other % # A opposite to the thrust bearing 58 of the protruding piece 3 54, and is also formed as a surface.
^ ^ 圖20所示,位於突屮H :外周這:,將成V字狀的一,溝槽一:片: 由連接溝_連續地形成的人字形的溝槽而被形周向: 時,第3動壓力產生溝槽364 ’為成v字狀的 的頂端㈣轴體351的旋轉方向Ri被形成。籌槽36“ 藉由使用如此的軸體351,因為沒有於徑向輛承55及止 推輛承58形成動壓力產生溝槽的必要,所以這些徨向轴承 55及止推軸承58變成容易製造。 再者,在突出片3 54,僅形成第2動壓力產生溝槽或第3 動壓力產生溝槽363、364中任一條的一方也可 3 ,即使如 此地形成的時候,因為沒有於徑向軸承55或止 m軸承5 8的 一方設置動壓力產生溝槽的必要,所以軸承變成容易製 造。 此外,在突出片3 54,沒有設置動壓力產生溝槽僅形成 平坦的圓盤狀也可以,在如此的軸體351,軸部353的形成 變成容易’且軸承單元3〇〇的製造變成容易。 可是,有關本發明的軸承單元3〇,如圖5所示,係於軸 體5!支樓轉子15且被安裝Μ子外殼21而構成主轴馬達 4。因此,軸承單元3〇有必要被定位而確實地被安裝於外 -32- 1279062^ ^ As shown in Fig. 20, located at the abrupt H: outer circumference: this will be a V-shaped one, the groove one: the piece: the groove formed by the connecting groove_ continuously formed by the chevron-shaped groove: The third dynamic pressure generating groove 364' is formed in a v-shaped tip end (four) in the rotational direction Ri of the shaft body 351. By using such a shaft body 351, since the radial bearing 55 and the thrust bearing 58 are not necessary to form a dynamic pressure generating groove, these turning bearing 55 and thrust bearing 58 become easy to manufacture. Further, in the protruding piece 3 54, only one of the second dynamic pressure generating grooves or the third dynamic pressure generating grooves 363, 364 may be formed, and even if it is formed in this way, since it is not in the diameter It is necessary to provide a dynamic pressure generating groove to one of the bearing 55 or the stop bearing 55, so that the bearing becomes easy to manufacture. Further, in the protruding piece 3 54, no dynamic pressure is generated, and the groove is formed only in a flat disk shape. In such a shaft body 351, the formation of the shaft portion 353 becomes easy and the manufacture of the bearing unit 3A becomes easy. However, the bearing unit 3A according to the present invention is attached to the shaft body 5 as shown in Fig. 5! The fulcrum rotor 15 is mounted with the rafter casing 21 to constitute the spindle motor 4. Therefore, the bearing unit 3 〇 needs to be positioned and securely mounted to the outer -32-1279062
(28) 殼21 〇 其次,參照2 1至圖22說明設置對於主軸馬達的定子外殼 被定位而確實地被固定、可安裝的機械固定機構的軸承單 元及使用該軸承單元的主軸馬達的例子。 再者,在與前述的圖5的主軸馬達4共同的部分,付予共 同的符號而省略詳細的說明。(28) Shell 21 〇 Next, an example of a bearing unit provided with a mechanical fixing mechanism in which the stator casing of the spindle motor is positioned and fixed and mountable, and a spindle motor using the bearing unit will be described with reference to Figs. In the same portions as the spindle motor 4 of Fig. 5 described above, the same reference numerals are given to the same portions, and detailed description thereof will be omitted.
使用於圖2 1所示的主軸馬達1 1 4的軸承單元1 3 0,於外殼 5 6形成構成作為對定子外殼2 1的機械式的固定機構的卡 住部的段差部1 3 1。段差部1 3 1,形成於軸體5 1突出的外殼 56的上秦封閉部73所設置的這邊的外周圍。 再者,構成主軸馬達114的定子16的定子外殼21的圓筒 部28,相當於軸承單元130的外殼56的安裝部。 於外殼5 6形成構成卡住部的段差部1 3 1的軸承單元 130,係***設於以不銹鋼等的金屬形成的定子外殼21的 圓筒部2 8之時,藉由使設於圓筒部2 8的頂端這邊的鉚接部The bearing unit 1300 of the spindle motor 1 14 shown in Fig. 21 is formed in the outer casing 56 as a step portion 13 1 which constitutes a catch portion of a mechanical fixing mechanism for the stator casing 21. The step portion 133 is formed on the outer periphery of the side provided by the upper Qin seal portion 73 of the outer casing 56 projecting from the shaft body 51. Further, the cylindrical portion 28 of the stator casing 21 constituting the stator 16 of the spindle motor 114 corresponds to the mounting portion of the casing 56 of the bearing unit 130. The bearing unit 130 which forms the step portion 13 1 constituting the engaging portion in the outer casing 56 is inserted into the cylindrical portion 28 of the stator casing 21 formed of a metal such as stainless steel, and is provided in the cylinder. The riveting part of the top side of the part 2 8
1 3 2變形而使段差部1 3 1卡住,機械式的被固定於定子外殼 2 1。如此地,藉由於外殼5 6被***的圓筒部2 8這邊設置鉚 接部1 3 2,且安裝軸承單元1 3 0,並沒有給與軸承單元1 3 0 大的負載可於主軸馬達114的一定位置定位而安裝。 作為軸承單元1 3 0外殼5 6的材料,即使形成為對於金屬 靠黏著的結合不充分的聚亞烯胺、聚醯胺、或尼龍等的合 成樹脂的時候,因為將軸承單元1 3 0於圓筒部2 8藉由鉚接 機構固定,所以可將合成樹脂的外殼5 6確實地機械式的固 定於金屬製的圓筒部28。 -33- 1279062The 1 3 2 deformation causes the step portion 1 3 1 to be caught, and is mechanically fixed to the stator case 2 1 . In this manner, the rivet portion 1 3 2 is provided by the cylindrical portion 28 to which the outer casing 56 is inserted, and the bearing unit 1300 is mounted, and the load that is not given to the bearing unit 1300 is available to the spindle motor 114. The location is fixed and installed. As the material of the outer casing 56 of the bearing unit 130, even if it is formed of a synthetic resin such as polyalkenamide, polyamide or nylon which is insufficiently bonded to the metal, since the bearing unit 1 3 0 Since the cylindrical portion 28 is fixed by the caulking mechanism, the outer casing 56 of the synthetic resin can be mechanically fixed to the cylindrical portion 28 made of metal. -33- 1279062
(29) 作為將有關本發明的軸承單元機械式的固定於主軸馬 達等的馬達的手段,除了上述的鉚接手段之外,也可使用 熱熔的手段組裝。該熱熔的手段,係在由軸承單元的合成 樹脂形成的外殼這邊設置熱熔用的凸點,且將該凸點嵌合 於定子外殼這邊,藉由使熱變形將軸承單元固定於定子外 殼。 此外,也可以於軸承單元的外殼這邊一體地設置螺紋 部,將該螺紋部鎖進至定子外殼這邊的螺絲孔而組裝。 再者,於形成軸承單元的圓筒狀的外殼的外周表面設置 平坦部/或外殼的外周面設置突條部,藉由將對應這些平 坦部、突條部的平坦部、卡住凹部設置於定子外殼的圓筒 部這邊,變成能夠將軸承單元對馬達的定子外殼安裝的位 置定位而組裝。 在上述的主軸馬達使用的軸承單元,雖然在外殼可旋轉 地支撐軸體,但是外殼也可以對該軸體旋轉而支撐。 參照圖面說明使用固定軸體的軸承單元的主軸馬達的 例子。 再者,在與圖5的軸承單元30及使用該軸承單元30的主 軸馬達4共同的部分,付予共同的符號而省略詳細的說明。 軸固定型的主軸馬達204,如圖23所示,係將軸承單元 2 3 0的軸體5 1固定於定子外殼1 2 1。軸體5 1,係將設於由外 殼56突出的這邊的安裝部52壓入至穿孔於定子外殼121的 安裝孔1 5 2,被且固定於定子外殼1 2 1。軸承單元2 3 0,係 藉由軸體5 1被固定,外殼5 6對軸體5 1變成旋轉無拘束地被 1279062 (30)(29) As means for mechanically fixing the bearing unit according to the present invention to a motor such as a spindle motor, in addition to the above-described caulking means, it may be assembled by means of hot melt. The means for hot-melting is to provide a bump for hot-melting on the outer side of the outer casing formed of the synthetic resin of the bearing unit, and to fit the bump to the side of the stator casing, and fix the bearing unit to the heat-deformed portion. Stator housing. Further, a threaded portion may be integrally provided on the outer casing of the bearing unit, and the threaded portion may be locked into a screw hole on the side of the stator casing to be assembled. Further, a flat portion is provided on the outer circumferential surface of the cylindrical outer casing forming the bearing unit, or a protruding portion is provided on the outer circumferential surface of the outer casing, and the flat portion and the concave portion corresponding to the flat portion and the protruding portion are disposed on The cylindrical portion of the stator casing is assembled by positioning the bearing unit at a position where the stator casing of the motor is mounted. In the bearing unit used in the above-described spindle motor, although the shaft body is rotatably supported by the outer casing, the outer casing can be supported by rotating the shaft body. An example of a spindle motor using a bearing unit that fixes a shaft body will be described with reference to the drawings. In the same manner as the bearing unit 30 of Fig. 5 and the main shaft motor 4 using the bearing unit 30, the same reference numerals are given to the same portions, and detailed description thereof will be omitted. As shown in Fig. 23, the shaft-fixed spindle motor 204 is fixed to the stator housing 1 21 by the shaft body 51 of the bearing unit 203. The shaft body 5 1 presses the mounting portion 52 provided on the side protruding from the outer casing 56 into the mounting hole 152 which is bored in the stator casing 121, and is fixed to the stator casing 1 2 1 . The bearing unit 203 is fixed by the shaft body 5 1 , and the outer casing 56 is rotated to the shaft body 5 1 without being restrained by the 1279062 (30)
支撐 在 軸承 153 〇 的鐵 本 轉無 子外 的外 外殼 再 對於 在 面, 鐵1 9 的轉 壓接 旋轉 有 轉, 依照 當選 可 成樹 狀態 軸體51固定的定子外殼121的這邊,如圖23所示,將 單元230的外殼56包圍似地設置圓筒狀的線圈組裝部 於線圈組裝部I53的外圍,組裝驅動線圈222所捲繞 心2 3 〇 例子的主軸馬達2〇4係將轉子115安裝在對軸體”旋 拘束地被支撐的外殼%這邊。轉子115係將穿孔於轉 殼12〇的中心部的後合孔154壓入至設於軸承單元23〇 殼56的底部封閉部72這邊的外周 I周圍的嵌合部155,與 5 6 —體地可旋轉地被組裝。 〇 者,在嵌合孔154内及嵌合部155的外周圍,形成 轉子115的外殼56的安裝位置定 . 該主轴馬達一轉子外殼12〇的筒狀 也與定子116這邊的驅動線圈22對向似地配設轉子二 。在轉子外殼120的外周圍這 違 形成硬碟機3所截晉 盤1 7。該硬碟機3也藉由内用、 稽田内周廷邊的部分轉盤1?及 該轉盤17上的挾持構件18,盥 地被支撑。 -轉子外W20-體地可The outer casing supported on the outer side of the bearing 153 再 is turned to the outer surface of the iron, and the rotation of the iron 19 is rotated, according to the side of the stator casing 121 fixed to the shaft body 51 of the tree state, as shown in the figure. As shown in FIG. 23, the outer casing 56 of the unit 230 is provided with a cylindrical coil assembly portion around the outer periphery of the coil assembling portion I53, and the winding of the drive coil 222 is assembled. The spindle motor 2〇4 is a rotor. 115 is attached to the side of the outer casing % which is pivotally supported by the pair of shafts. The rotor 115 presses the rear fitting hole 154 which is pierced in the center portion of the casing 12 to the bottom of the casing 56 of the bearing unit 23 to be closed. The fitting portion 155 around the outer circumference I of the portion 72 is rotatably assembled integrally with the body 6. The outer casing 56 of the rotor 115 is formed in the fitting hole 154 and the outer periphery of the fitting portion 155. The mounting position of the spindle motor is a cylindrical shape of the rotor casing 12, and the rotor 2 is also disposed opposite to the driving coil 22 on the side of the stator 116. In the outer periphery of the rotor casing 120, the hard disk machine 3 is formed. Cut the disk 1 7. The hard disk drive 3 is also used internally, ? Tin Zhouting inner side portion of the turntable 1 and the grasping member 17 of the turntable 18 is supported to wash - the outer rotor body may W20-
關本發明的軸承單元 而且可固定抽體51這 有關本發明的轴承| 擇0 是有關本發明的車由 脂形成支撐金屬製 ’如上所述並不僅軸體這邊可旋 ' 也了以將外殼作成可旋轉, 元所使用的馬達等的結構可適 承單元’以電氣性的緣材料的合 的軸體的外殼的時候,擔心無法確 -35- 1279062The bearing unit of the present invention can also be fixed to the pumping body 51. The bearing relating to the present invention is selected from the fact that the vehicle of the present invention is formed of a support metal made of grease as described above and not only the shaft body can be rotated. The outer casing is made rotatable, and the structure of the motor or the like can be used to accommodate the unit's outer casing of the shaft body with the electrical edge material, and it is impossible to confirm -35-1279062
(31) 實地將由於旋轉被軸體帶電的靜電放電至軸承單元的外 部。 使用無法將由於軸體的旋轉所產生的靜電放電至軸承 單元的外部的軸承單元於磁碟機驅動設備的時候,發生如 下的問題。 因為沒有具備由為軸承單元的旋轉部的軸體的放電機 構或放電路徑,所以靜電經由軸體被帶至旋轉無拘束地被 支撐的硬碟機。例如,被帶至掃描硬碟機上進行資料信號 的存取的磁阻效果元件磁頭,因為耐電壓性能為1 〇 〇 V左右(31) The static electricity charged by the shaft body due to the rotation is discharged to the outside of the bearing unit. The following problems occur when a bearing unit that cannot discharge static electricity due to the rotation of the shaft body to the outside of the bearing unit is used in the disk drive device. Since the discharge mechanism or the discharge path of the shaft body which is the rotating portion of the bearing unit is not provided, the static electricity is brought to the hard disk drive which is supported without being restrained by the shaft body. For example, a magnetoresistive element head that is brought to a scanning hard disk drive for accessing a data signal because the withstand voltage performance is about 1 〇 〇 V
I 非常低,故擔心由於靜電被破壞。 因此,使用有關本發明的軸承單元,在有必要將一點點 的靜電的影響也除去的資料信號的存取的磁碟機驅動設 備等的時候,最好具備可確實地將在旋轉部所產生的靜電 放電至外部的結構。 以下,說明能夠將由於軸體的旋轉所產生的靜電放電至 外殼的外部的軸承單元及使用該軸承單元的主軸馬達。 再者,在以下的說明,與上述圖5及圖6所示的軸承單元 及使用主軸馬達共同的部分,付予共同的符號而省略詳細 的說明。 使用能夠將由於轴體5 1的旋轉所產生的靜電放電至外 殼5 6的外部的軸承單元1 6 0的主軸馬達2 1 4,如圖2 4所示, 與上述圖5所示的主軸馬達4 一樣地,使用於磁碟機驅動設 備0 被使用於如圖2 4所示的主軸馬達2 1 4的軸承單元1 6 0,如 1279062I is very low, so I am worried that it will be destroyed due to static electricity. Therefore, when a bearing unit according to the present invention is used, it is preferable to have a disk drive device or the like that accesses a data signal that is removed by a small amount of static electricity. Electrostatic discharge to the external structure. Hereinafter, a bearing unit capable of discharging static electricity generated by the rotation of the shaft body to the outside of the casing and a spindle motor using the bearing unit will be described. In the following description, the same components as those of the bearing unit and the spindle motor shown in Figs. 5 and 6 will be given the same reference numerals, and detailed description thereof will be omitted. A spindle motor 2 1 4 capable of discharging the static electricity generated by the rotation of the shaft body 51 to the outside of the outer casing 56 is used, as shown in FIG. 24, and the spindle motor shown in FIG. 5 described above. 4 Similarly, the drive unit 0 for the drive is used for the bearing unit 1 6 0 of the spindle motor 2 1 4 as shown in Fig. 24, such as 1279062
(32) 圖2 5所示’為使用混合導電性材料的導電性樹脂形成外殼 1 5 6。該導電性樹脂,為作為導電性樹脂為使具有導電性 的石墨金屬粉末摻入聚碳酸酯、聚脂、尼龍、聚亞烯胺、 液晶聚合物等。此外,使用於合成樹脂中將具有導電性的 石墨奈米碳管摻入的精密成形為可行。 被充填於藉由如此的導電性樹脂形成的外殼丨5 6中的潤 滑油1 5 7也使用具有導電性的材料。作為該潤滑油丨5 7,可 使用例如在醋系(Ester系)、酯系、過氧系、氟素系等的機 油裏摻入具有導電性的碳化合物等的導電材料。 被收森配置於外殼1 5 6内的徑向軸承丨5 5,如上述使用以 具有導電性的金屬材料形成的燒結金屬、黃銅或不銹鋼形 成。 再者,被外殼156支撐的軸體51也以具有導電性的金 屬,例如以不銹鋼形成。 使用上述的材料而形成的軸承單元16〇,係具有由軸體 51被充填於外殼156的導電性的潤滑油157 ,並且至具有徑 向轴承55及導電性的外殼156的放電路徑。亦即該軸承單 元16〇,形成將於外殼156内軸體51旋轉所產生的靜電釋放 至外殼1 5 6外部的放電路徑。 使用具有如此的放電路徑的軸承單元1 6 〇的主軸馬達 214 ’係將由於軸體51旋轉所產生的靜電,如圖24所示, 可放電至設於構成定子16的金屬製的定子外殼21的圓筒 郤2 8。如此地,使用有關本發明的轴承單元1 $ 〇主軸馬達 214,因為可將由於軸體51旋轉所產生的靜電放電至定子 -37- 1279062(32) Fig. 25 shows that the outer casing 156 is formed of a conductive resin using a mixed conductive material. The conductive resin is a conductive resin in which graphite metal powder having conductivity is incorporated into polycarbonate, polyester, nylon, polyalkylene, liquid crystal polymer or the like. Further, it is possible to precisely form a graphite carbon nanotube having electrical conductivity for use in a synthetic resin. The lubricating oil 157 filled in the outer casing 丨56 formed of such a conductive resin also uses a material having conductivity. For the lubricating oil crucibles 5-7, for example, a conductive material such as a conductive carbon compound may be blended in an oil such as an vinegar (Ester), an ester system, a peroxygen system or a fluorine system. The radial bearing 丨 5 5 disposed in the outer casing 156 is formed of a sintered metal, brass or stainless steel formed of a conductive metal material as described above. Further, the shaft body 51 supported by the outer casing 156 is also formed of a conductive metal such as stainless steel. The bearing unit 16A formed using the above-described material has a conductive lubricating oil 157 filled with the shaft body 51 by the shaft body 51, and a discharge path to the radial bearing 55 and the electrically conductive outer casing 156. That is, the bearing unit 16 is formed to form a discharge path in which the static electricity generated by the rotation of the shaft 51 in the outer casing 156 is released to the outside of the outer casing 156. The spindle motor 214' using the bearing unit 16 6 having such a discharge path is electrostatically generated by the rotation of the shaft 51, as shown in Fig. 24, and can be discharged to the metal stator case 21 provided in the stator 16 The cylinder is 2 8 . Thus, the bearing unit 1 〇 spindle motor 214 relating to the present invention is used because the static electricity generated by the rotation of the shaft body 51 can be discharged to the stator -37-1279062
(33) 外殼21,故靜電因通過轉盤17可防止於硬碟機3帶電。其 結果,在進行資料信號的存取的磁頭靜電被釋放,而可確 實地防止遭到破壞。 為了構成由軸承單元的旋轉軸至主軸馬達的定子外殼 · 的放電路徑,於前述的圖14及圖15所示的軸承單元1〇1, ; 11 0 ’如果於被充填於外殼5 6的潤滑油6 7使用具有導電性 的材料的話,可形成由轴體51至外殼56外界的放電路徑。 如此地,藉由使用具備由轴體至外殼外界的放電路徑的 鲁 軸承單元,可不遭受靜電的影響,且達到確實保護構成磁 頭等的硬碟機驅動設備的零件。 具有放電路徑之本發明軸承單元,更如上所述可防止充 填於外殼之潤滑油的漏出,因此,硬碟機驅動設備内之磁 頭或硬碟不會因潤滑油而污損,故而,可確實保護磁頭或 硬碟’可構成能夠安全地作資訊信號的記錄再生之硬碟機 驅動設備。 更進一步’參照圖面說明有關本發明的軸承單元的其他 · 例子。 該轴承單元,也如前述的圖5及圖6所示的轴承單元3〇一 樣,因為被使用於硬碟機驅動設備的主軸馬達,故與上述 圖5及圖6所示的轴承卓元3〇及主軸馬達4共同的部分,付 予共同的符號而省略詳細的說明° 本例子的軸承單元3 30 ,如圖26所示,嵌合設於主軸馬 達304的定子外殼21的圓筒部28而安裝。此時,軸承單元 3 3 0藉由軸體51所突出的外殼256的上層封閉部73的外周 -38- Ϊ279062(33) The outer casing 21, so that the static electricity can be prevented from being charged to the hard disk drive 3 by the turntable 17. As a result, the static electricity of the head which is accessed by the data signal is released, and the damage is surely prevented. In order to form a discharge path from the rotating shaft of the bearing unit to the stator housing of the spindle motor, the bearing unit 1〇1, 11 0 ' shown in Figs. 14 and 15 described above is lubricated in the housing 56. The oil 6 7 can form a discharge path from the shaft body 51 to the outside of the outer casing 56 by using a material having electrical conductivity. Thus, by using the Lu bearing unit having the discharge path from the shaft body to the outside of the casing, it is possible to avoid the influence of static electricity and to securely protect the components of the hard disk drive device constituting the magnetic head or the like. The bearing unit of the present invention having a discharge path can prevent the leakage of the lubricating oil filled in the outer casing as described above. Therefore, the magnetic head or the hard disk in the hard disk drive device is not contaminated by the lubricating oil, so that it can be sure The protective head or hard disk 'can constitute a hard disk drive device capable of safely recording and reproducing information signals. Further, other examples of the bearing unit according to the present invention will be described with reference to the drawings. The bearing unit is also the same as the bearing unit 3〇 shown in FIGS. 5 and 6 described above, and is used in the spindle motor of the hard disk drive device, so that the bearing element shown in FIG. 5 and FIG. 6 above is used. The common parts of the spindle motor 4 are given the same reference numerals and the detailed description is omitted. The bearing unit 3 30 of the present example is fitted to the cylindrical portion of the stator casing 21 of the spindle motor 304 as shown in Fig. 26 . 28 and installed. At this time, the outer circumference of the upper layer closing portion 73 of the outer casing 256 by which the bearing unit 323 protrudes by the shaft body 51 - 38 - Ϊ 279062
(34) 圍靠設於圓筒部28的頂端這邊的卡鉤28a被卡住,在定子 外殼21定位而固定著。 具備構成主軸馬達304的主軸的軸體51的本例子的軸承 單元330,如圖27及圖28所示,係具備:設有於軸部53的 —端部形成比軸部53大徑的圓盤狀的突出體的突出片54 的軸體51,支撐軸體51的周圍四周方向的徑向軸承55,支 撐設於軸體51的止推方向的一端這邊的突出片54的止推 軸承58,及收藏支撐這些徑向軸承55與止推軸承58的外殼 256 〇 外殼2 5 6係使用合成樹脂形成,且具有形成圓筒狀的徑 向軸承55所收藏的第1收藏支撐部910、止推軸承58所收藏 的第2收藏支撐部911及轴體51的突出片54所收藏的突出 片收藏支撐部913»第2收藏支撐部911及突出片收藏支撐 部9 1 3連續而形成。第1收藏支撐部9 1 0係以比第2收藏支撐 部9 1 1的内徑還小的内徑形成,收藏支撐部9 1 3的内徑,係 以第1收藏支撐部910及第2收藏支撐部911的各自内徑的 中間内徑形成。 在第1收藏支撐部910,如圖27所示,形成圓筒狀的徑向 轴承5 5所收藏而被支撐著。在第2收藏支撐部9 1 1,圓板狀 的止推轴承58被收藏支撐著。在突出片收藏部913的内 部,軸體5 1的突出片54在上下及外周圍以一點點的空隙所 形成的狀態被收藏。 外殼256的内圍這邊,突出外殼256的内部而間隔片1000 被穿孔於周向的整個周圍。間隔片1 〇 〇0被形成於隔開第1 -39- 1279062(34) The hook 28a provided on the tip end of the cylindrical portion 28 is caught and fixed in the stator casing 21. As shown in FIGS. 27 and 28, the bearing unit 330 of the present example including the shaft 51 that constitutes the main shaft of the spindle motor 304 has a circle formed at the end portion of the shaft portion 53 to have a larger diameter than the shaft portion 53. The shaft body 51 of the protruding piece 54 of the disc-shaped projection body supports the radial bearing 55 in the circumferential direction around the shaft body 51, and supports the thrust bearing of the protruding piece 54 provided at one end of the thrust direction of the shaft body 51. 58 and a housing 256 that supports the radial bearing 55 and the thrust bearing 58. The housing 256 is formed of a synthetic resin, and has a first storage support portion 910 that is formed by a cylindrical radial bearing 55. The second storage support portion 911 of the thrust bearing 58 and the protruding piece storage support portion 913»the second storage support portion 911 and the protruding piece storage support portion 9 1 3 which are collected by the protruding piece 54 of the shaft body 51 are formed continuously. The first storage support portion 9 1 0 is formed with an inner diameter smaller than the inner diameter of the second storage support portion 9 1 1 , and the inner diameter of the storage support portion 9 1 3 is the first storage support portion 910 and the second An intermediate inner diameter of each inner diameter of the collection support portion 911 is formed. As shown in Fig. 27, the first collection support portion 910 is housed and supported by a cylindrical radial bearing 55. In the second storage support portion 911, the disk-shaped thrust bearing 58 is supported by the storage. In the inner portion of the protruding piece storage portion 913, the protruding piece 54 of the shaft body 51 is housed in a state of being formed with a slight gap between the upper and lower sides and the outer periphery. The inner circumference of the outer casing 256 projects the inside of the outer casing 256 and the spacer 1000 is perforated throughout the circumference. Spacer 1 〇 〇0 is formed in the interval 1 - 39 - 1279062
收藏支撐部9 1 0及第2收藏支撐部9 1 1之間的位置。在間隔 片1 0 0 0的中心部’使足夠插通轴體5 1的轴部5 3大小的軸插 通孔1 0 0 1被形成。軸體5 1如圖2 7所示,係將軸部5 3插通至 軸插通孔1 0 0 1而插通至軸承5 5,使安裝部5 2由設於上部封 閉部7 3的軸插通孔7 5突出而配置於外殼2 5 6。此時,突出 片5 4位於突出片收藏913内,且止推軸承58成為被收藏配 置於弟2收藏支擇部9 1 1内的狀態。The position between the support portion 9 10 and the second collection support portion 9 1 1 is collected. A shaft insertion hole 1 0 0 1 having a size sufficient to be inserted into the shaft portion 53 of the shaft body 5 1 is formed at the center portion of the spacer 1 0 0 0. As shown in FIG. 27, the shaft body 5 1 is inserted into the shaft insertion hole 1 0 0 1 and inserted into the bearing 55, so that the mounting portion 52 is provided in the upper closing portion 73. The shaft insertion hole 7 5 is protruded and disposed in the outer casing 256. At this time, the protruding piece 5 4 is located in the protruding piece holder 913, and the thrust bearing 58 is placed in the state of being placed in the collection portion 9 1 1 of the younger brother 2.
支樓收藏於外殼256的第1收藏支撐部910的軸體51的周 向的旋轉的徑向軸承55的内周面,如圖29所示,對向於軸 部53的 >卜周面而一對的形成第1動壓力產生溝槽261、 262,將於徑向轴承55的内周面成為V字狀的一對溝槽261a 於周向糟由連接溝槽26 lb作為連續形成的人字形溝槽而 被形成乂些動壓力產生溝槽261、262,形成V字狀的一 對/籌槽26U的頂端這邊也朝軸體51的旋轉方向R2而形 成,在本例子,链 第1動壓力產生溝槽261、2 62並列於形成 圓筒狀的軸承55的軸方向上下而形成The inner peripheral surface of the radial bearing 55 that is rotated in the circumferential direction of the shaft body 51 of the first collection support portion 910 of the outer casing 256 is opposite to the circumferential portion of the shaft portion 53 as shown in Fig. 29 On the other hand, the first dynamic pressure generating grooves 261 and 262 are formed, and a pair of grooves 261a which are V-shaped on the inner circumferential surface of the radial bearing 55 are continuously formed by the connecting grooves 26 lb in the circumferential direction. The gravitational grooves are formed by the dynamic pressure generating grooves 261 and 262, and the tip end of the V-shaped pair of grooves 26U is also formed in the rotation direction R2 of the shaft body 51. In this example, the chain The first dynamic pressure generating grooves 261 and 2 62 are formed side by side in the axial direction of the cylindrical bearing 55.
此外,與开^点 ” /紙於軸體5丨所收藏配置的外殼2 5 6内的間隔 片1000突出片54 向的面這邊,如圖27及圖30所示,形成 第2動壓力產生、、鲁 辱槽263。第2動壓力產生溝槽263,也如圖 3 0所示,位於門 、曰J隔片1 000的外圍這邊,將成為V字狀的一 對溝槽2 6 3 a於周& — 精由連接溝槽263b作為環狀地連續形 成的人字形溝样 #〜而破形成。此時,第2動壓力產生溝槽 2 6 3,形成v字妝从Further, as shown in FIGS. 27 and 30, the second dynamic pressure is formed as shown in FIGS. 27 and 30, with the opening/pointing/paper disposed on the surface of the spacer 155 in the outer casing 256 of the casing 5 收藏. The second dynamic pressure generating groove 263 is generated, and as shown in FIG. 30, on the outer side of the door and the 隔J spacer 1 000, a pair of grooves 2 having a V shape will be formed. 6 3 a is in the circumferential & - finely formed by the connecting groove 263b as a herringbone groove pattern # 。 continuously formed in a ring shape. At this time, the second dynamic pressure generates the groove 2 6 3 to form a v-shaped makeup
w的一對溝槽263a、263a的頂端這邊朝軸體 5 1的旋轉方向R J心而破形成。 -40- 1279062The tip end of the pair of grooves 263a, 263a of w is formed by breaking the center of the rotation direction R J of the shaft body 5 1 . -40- 1279062
々再者,在與止推軸承58的軸體51的突出片54對向的面, 第3動壓力產生溝槽264被形成。該第3動壓力產生溝槽 264,也如圖28及圖29所示,位於形成圓盤狀的軸承“的 外圍這邊,將成為V字狀的一對溝槽26“於周向藉由連接 1槽264b作為環狀地連續形成的人字形溝槽而形成。此 0守’形成v字狀的一對溝槽264a、264a的頂端這邊朝軸體 51的旋轉方向r2而被形成。Further, the third dynamic pressure generating groove 264 is formed on a surface facing the protruding piece 54 of the shaft body 51 of the thrust bearing 58. As shown in FIGS. 28 and 29, the third dynamic pressure generating groove 264 is located on the outer periphery of the disk-shaped bearing "the pair of grooves 26 which are V-shaped" in the circumferential direction. The connection 1 groove 264b is formed as a herringbone groove formed continuously in a ring shape. The front end of the pair of grooves 264a and 264a forming the v-shape is formed in the rotation direction r2 of the shaft body 51.
第1至第3中任一條的動壓力產生溝槽261、262、263、 264,係軸體51被徑向軸承55及止推軸承58被外殼%支撐 而續旋▲之時,藉由被充填於外殼56内的黏性流體的潤滑 油67的流通,於軸體51與徑向軸承55及止推軸承58之間使 產生動壓力作旋轉的轴體51之支撐。亦即,徑向軸承55及 止推軸承58作為動壓力流體軸承而發揮功能。藉由軸體51 的旋轉產生的動壓力’係由於軸體51與徑向軸承55及止推 轴承58之間的摩擦係數極小,實現軸體51的圓滑的旋轉。The dynamic pressure generating grooves 261, 262, 263, and 264 of any one of the first to third, when the shaft body 51 is supported by the outer casing % by the radial bearing 55 and the thrust bearing 58, and is rotated by ▲ The flow of the lubricating oil 67 filled with the viscous fluid in the outer casing 56 is supported between the shaft body 51 and the radial bearing 55 and the thrust bearing 58 by the shaft body 51 that generates the dynamic pressure. That is, the radial bearing 55 and the thrust bearing 58 function as a dynamic pressure fluid bearing. The dynamic pressure generated by the rotation of the shaft 51 is such that the coefficient of friction between the shaft body 51 and the radial bearing 55 and the thrust bearing 58 is extremely small, so that the shaft 51 is smoothly rotated.
有關構成本發明的軸承單元3 30之外殼256及止推軸承 58’因為可藉由合成樹脂形成’且因為於間隔片ι〇〇〇形成 的第2動壓力產生溝槽263及於止推軸承58形成的第3動壓 力產生溝槽264,係於形成外殼256及止推軸承“之際可一 體形成,所以能夠非常容易地形成。這些第2及第3動壓力 產生溝槽263、264,因為可以塑膠模具成形,所以比在金 屬製的材料進行切削等而形成的時候容易幵》成。 本例子的軸承單元3 3 0 ’為達到往潤滑油67的第2及第3 動壓力產生溝槽263、264的集中,且於軸體51的旋轉之時 -41- (37) 1279062The outer casing 256 and the thrust bearing 58' constituting the bearing unit 306 of the present invention are formed by synthetic resin and the groove 263 is generated by the second dynamic pressure formed by the spacer ι and the thrust bearing The third dynamic pressure generating groove 264 formed at 58 can be formed integrally when the outer casing 256 and the thrust bearing are formed. Therefore, the second and third dynamic pressure generating grooves 263 and 264 can be formed. Since it can be molded by a plastic mold, it is easier to form than when a metal material is formed by cutting or the like. The bearing unit 3 3 0 ' of this example generates a groove for the second and third dynamic pressures of the lubricating oil 67. The concentration of the grooves 263, 264, and when the shaft 51 is rotated - 41 - (37) 1279062
使產生穩定的動壓力, ^ 間隔片1000與轴 ’最好第2動墨力產生溝槽263形成的 力產生溝槽264幵體51的突出片54之間的間隔,及第3動壓 間的間隔儘可< &成的止推軸承58與軸體51的突出片54之 %縮小。 構成本發明的一 在收藏徑向軸承5 5 7早元3 3 0之外殼256,於外殼本體271 本體271藉由將广1、軸體51、止推軸承58的狀態,對外殼To generate a stable dynamic pressure, ^ the gap between the spacer 1000 and the shaft 'best second ink-moving force generating groove 263 generates the interval between the protruding piece 54 of the groove 264 of the groove 51, and the third dynamic pressure The interval between the <& thrust bearing 58 and the protruding piece 54 of the shaft body 51 is reduced. A casing 256 constituting the radial bearing 5 5 7 early 30 3 0 in the housing body 271 body 271 by the state of the wide 1, the shaft body 51, the thrust bearing 58
夠形成。如此地,、 』如外塑成形而一體化此 ^ 272,,,..,因為可對外殼本體271藉由將底部封閉 邵272例如外塑忐 广〇丄 > 而形成,故變成不需要機械性的組裝 工序且容易製造。 在匕多…、圖31說明本例子的軸承單元33〇的製造工序。 本例子的軸承單70 3 3 0 ,係經由第1樹脂外塑成形步驟 st卜τ型形狀的軸***步驟ST2、止推軸承的***步驟 ST3、第2樹脂外塑成形步驟ST4、加油步驟ST5及其他潤 、滑油的擦去、潤滑油充填的調整的各工序被製造。Enough to form. In this way, the outer casing body 271 can be formed by external molding, and the outer casing body 271 can be formed by closing the bottom portion 272, for example, plastic 〇丄 〇丄 〇丄Mechanical assembly process and easy to manufacture. In Fig. 31, the manufacturing process of the bearing unit 33A of the present example will be described. The bearing sheet 70 3 3 0 of the present example is a shaft insertion step ST2 via a first resin outer molding step st, a thrust bearing insertion step ST3, a second resin outer molding step ST4, and a fueling step ST5. And the steps of the adjustment of the other lubricating and lubricating oils and the adjustment of the lubricating oil filling are manufactured.
在第1樹脂外塑成形步驟ST1,係於徑向軸承5 5的周圍外 塑成形外殼本體271。 為了得到止推方向的良好潤滑,必需確保於止推軸承5 8 被形成的環狀第3動壓力產生溝槽264與軸體51的軸之同 心度。徑向軸承5 5被收藏支撐於第1收藏支撐部9 1 0内。 在被形成外殼256的間隔片1000的第2動壓力產生溝槽 263,於該第1樹脂外塑成形時,因為與外殼本體271可同 時形成,變成非常容易形成。 在下一個軸體51的***步驟ST2,由外殼本體271内的止 -42- (38) 1279062 推軸承5 8所配設的第2收藏支撐部9丨丨所形 电 〜成的敞開的底 部這邊將軸體51***。此時,軸體51使 鴂4的組裝部52 由没於上部封閉部7 3的軸插通孔7 5突出,使 從次出片54位於 突出片收藏部913的狀態而被配置在外殼本體271。 、 在下一個止推軸承的***步驟ST3, 第2收藏保持部9U内。 推輪承58被*** 在第2樹脂外塑成形步驟ST4,藉由於 你袖承5 8的外側 、加的合成樹脂材料被外塑成形形成底部封閉呷π】 =!Γ 256,止推轴承58固定於第2收藏㈣部二 殼256内。,。之後’在加油步驟ST5’潤滑油被充填於外 =:,外殼256’除了形成於上部封閉部73的轴插通 5之外,將轴體51的軸部53、突出片54、徑向軸承乃及 止推軸承58封入而一體地維持。 ,使用於本例子的軸承單元33G之止推軸承Μ,係於戈In the first resin outer molding step ST1, the outer casing main body 271 is molded around the radial bearing 55. In order to obtain good lubrication in the thrust direction, it is necessary to ensure the concentricity of the annular third dynamic pressure generating groove 264 formed by the thrust bearing 58 and the shaft of the shaft body 51. The radial bearing 55 is housed and supported in the first storage support portion 910. The second dynamic pressure generating groove 263 of the spacer 1000 on which the outer casing 256 is formed is formed at the same time as the outer casing main body 271 at the time of external molding of the first resin, and is formed very easily. In the insertion step ST2 of the next shaft body 51, the second storage support portion 9 provided by the bearing 58 is pushed by the end - 42 - (38) 1279062 in the casing body 271 to form an open bottom portion. The shaft body 51 is inserted. At this time, the shaft body 51 causes the assembly portion 52 of the crucible 4 to protrude from the shaft insertion hole 75 that is not in the upper closing portion 73, and is disposed in the housing body from the state in which the secondary sheet 54 is positioned in the protruding piece storage portion 913. 271. In the insertion step ST3 of the next thrust bearing, the second storage holding portion 9U is provided. The push wheel bearing 58 is inserted in the second resin outer molding step ST4, since the outer side of the sleeve member 58 is externally molded, and the synthetic resin material is externally molded to form a bottom closed 呷 π] =! Γ 256, the thrust bearing 58 It is fixed in the second housing 256 of the second collection (four). ,. Then, in the refueling step ST5, the lubricating oil is filled outside =: the outer casing 256' except the shaft insertion 5 formed in the upper closing portion 73, the shaft portion 53, the protruding piece 54, the radial bearing of the shaft body 51 The thrust bearing 58 is enclosed and integrally maintained. , the bearing unit 33G used in the example of the thrust bearing Μ, is tied to the Ge
,S s、燒結金屬材料以數μηι的單位的 、K 壓力產生、、盖掩〇 衣度且將其大小的動 生溝槽264沖壓、軋製、蝕刻等 此,由於1«抓 叹罝的材枓。在 止推軸承58也由合成樹脂成形, 時可設置以捭, 因為於樹脂成形 264,m LV .,, 』的動壓力產生溝槽 如乂製造成為容易,可實現製造成本的低廉化。 〇在形成止推軸承58的合成樹脂使 龍等的 曰便用同潤滑性的尼 J树月日’旋轉之後的軸體5 1的軸蛊 的磨指”止推轴承58接觸時 貝破控制,且可構成信賴性高的轴承單元。 老·_ ,如圖26及圖27所示的軸承單元33〇,也如圖ι9 -43- 1279062 (39) 及圖20所示也可以使用於設突出片354的第2及/或第3動 壓力產生溝槽363、364的軸體351。 在此時,外殼256的間隔片1,000及止推軸承58的雙方或 其中任一方變成沒有必要設置動壓力產生溝槽。其結果, 外殼256或使用的止推軸承58的製造變成容易。 上述有關本發明的軸承單元,皆徑向軸承的最大外形尺 寸與設於軸體突出片的外形尺寸令人滿意地大約相同,且 採用比較地小型的徑向軸承及突出片。因此,可縮小外殼 本身的外形尺寸。 ί 雖然止推軸承的外形尺寸,變成比軸體的突出片及徑向 軸承的最大外形尺寸稍微大,但該止推軸承外形尺寸大的 部分,因為於外殼的半徑方向的肉厚内可吸收,故外殼的 外形尺寸並無變大之事。 有關本發明的上述任何例子之軸承單元,皆除了在設於 上部封閉部的軸體所插通的軸插通孔部分被形成的一點 點空隙之外,外殼成為封閉的構造。亦即,因為僅足夠防 止於軸插通孔部分作為被充填至外殼的黏性流體的潤滑 油洩露的空隙形成,其他為密封,故可構成並無像外殼内 的潤滑油漏至外部或飛散等的危險性的信賴性高的軸承 單元及具有該軸承單元之馬達。由於可防止潤滑油洩露或 飛散,在應用於磁碟機驅動設備的主軸馬達的時候,可達 到防止硬碟機污損及確實的保護。 再者,本發明所適用的軸承單元,因為可將軸體的徑向 方向及止推方向的維持以全部動壓力軸承支撐的構造來 -44 - (40) (40) 量定極 的一流 備馬 能穩達 殼到性 設的 無現馬 外得黏 動種 證實軸 至可的 驅各 保心主 填,種 機或 可偏的 充性各 碟達 且的備 被黏擇 磁馬 , 體設 為的選 於的 元軸動 作定地 用備 單止驅 用一當 使設 承防機 使有適 限熱 轴可碟 然是可 不散 的為磁 雖果, 並為 擦因的 ,如話 ,作 摩,速 元是的 元可 低且轉 單但油 單也 常並高 承,滑 承, 非。於 軸油潤 軸承 成轉用 的滑的 的軸。 構旋適 述潤力 明的用 可體故 上的張 發達使 以轴,。,體面 本!馬承 所的轉用者流表 關軸軸 , 失旋有再性的。有主的 做損的為 黏定體 的達 1279062 再者,有關本發明的軸承單元,並不限於馬達,可廣泛 地使用於對於具備旋轉軸的機構、支樓對軸旋轉的構件的 機構。 產業上的利用可能性 如上所述,本發明因為於軸體旋轉時確實地使產生動壓 力’而且能夠產生穩定的動壓力,故可實現軸體或被軸體 支推的構件以穩定狀態平順的旋轉。尤其,本發明因為可, S s, sintered metal material is produced in units of several μηι, K pressure, cover, and the size of the movable groove 264 is stamped, rolled, etched, etc., due to 1 «sighing Material. When the thrust bearing 58 is also formed of a synthetic resin, it is possible to provide a crucible because the dynamic pressure generating groove of the resin molding 264, m LV , is easy to manufacture, and the manufacturing cost can be reduced. The synthetic resin forming the thrust bearing 58 causes the squat of the dragon or the like to be in contact with the thrust bearing 58 of the shaft of the shaft body 5 1 after the rotation of the lubricity of the shaft J. And can form a highly reliable bearing unit. Old _, as shown in Fig. 26 and Fig. 27, the bearing unit 33 〇 can also be used as shown in Fig. ι 9 -43-1279062 (39) and Fig. 20. The second and/or third dynamic pressure of the protruding piece 354 generates the shaft body 351 of the grooves 363 and 364. At this time, neither or either of the spacers 1,000 of the outer casing 256 and the thrust bearing 58 become unnecessary. The dynamic pressure generating groove is provided. As a result, the manufacture of the outer casing 256 or the thrust bearing 58 used becomes easy. The above bearing unit relating to the present invention has the maximum outer dimensions of the radial bearing and the outer dimensions of the protruding piece provided on the shaft body. Satisfactoryly about the same, and relatively small radial bearings and protruding pieces are used. Therefore, the outer dimensions of the outer casing itself can be reduced. ί Although the outer dimensions of the thrust bearing become the protruding pieces and radial bearings of the shaft body The maximum size is slightly larger, but it should stop The portion of the outer diameter of the push bearing is absorbed in the thickness of the outer diameter of the outer casing, so that the outer shape of the outer casing does not become large. The bearing unit of any of the above examples of the present invention is provided in the upper part. The outer casing is closed except that a part of the shaft insertion hole portion through which the shaft body of the closing portion is inserted is closed. That is, since it is only sufficient to prevent the shaft insertion hole portion from being filled into the outer casing. Since the gap in which the lubricating oil of the fluid leaks is formed, and the other is sealed, it is possible to form a bearing unit having high reliability and a high reliability such as leakage of lubricating oil in the casing to the outside or scattering, and a motor having the bearing unit. To prevent leakage or scattering of lubricating oil, it is possible to prevent fouling and reliable protection of the hard disk machine when applied to the spindle motor of the disk drive device. Furthermore, the bearing unit to which the present invention is applied can be used for the shaft body. The radial direction and the thrust direction are maintained by the structure of all dynamic pressure bearing support. -44 - (40) (40) The first-class horse of the measuring pole can be stable to the shell. The viscous species of the horses are confirmed to be driven by the main shafts of the shafts, and the seeding machines or the biasable refillable discs are prepared by the magnetic horses. Use the order to stop the drive and use it to make the bearing machine have a suitable hot shaft. The disc can be dismissed for the magnetic effect, and it is the cause of the rubbing. If it is, the speed element is low. And the order is transferred, but the oil sheet is also often high-bearing, sliding bearing, non-sliding shaft for the shaft oil-lubricated bearing. The structure of the rotation is suitable for the use of the shaft. , Decent! This is the transfer of the transferee's flow table to the axis of the shaft, the loss of rotation is repetitive. The main damage is the bond body up to 1279062. Further, the bearing unit of the present invention, and It is not limited to a motor, and can be widely used for a mechanism that includes a mechanism for rotating a shaft and a member that rotates the shaft to the shaft. INDUSTRIAL APPLICABILITY As described above, the present invention can reliably generate a dynamic pressure when the shaft body is rotated to generate a dynamic pressure and can generate a stable dynamic pressure, so that the shaft body or the member supported by the shaft body can be smoothly stabilized. The rotation. In particular, the invention is
顯著降低軸體旋轉時的摩檫阻六,丛你田认A 予不I且力,故使用於向轉速的磁碟 機驅動設備等的馬達為有用。 圖面之簡要說明 圖1係表示先前所使用的轴承單元之剖面圖。 圖2係表示一種資料儲存讀取 取裝置的磁碟機驅動設備之 平面圖,其設備為使用了與本發 發明有關的軸承單元的馬達It is useful to reduce the frictional resistance of the shaft when it is rotated. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a bearing unit previously used. Figure 2 is a plan view showing a disk drive driving device of a data storage reading device which is a motor using a bearing unit related to the present invention
-45. 1279062-45. 1279062
(41) 所適用的一個例子。 圖3係表示於圖2所示的磁碟機驅動設備的内部機構之 分解立體圖。(41) An example that applies. Fig. 3 is an exploded perspective view showing the internal mechanism of the disk drive device shown in Fig. 2.
圖4係表示於圖2所示的磁碟機驅動設備的内部機構之 更詳細分解立體圖。 圖5係將與本發明有關的軸承單元於定子定位而組裝的 狀態的主軸馬達之剖面圖。Fig. 4 is a more detailed exploded perspective view showing the internal mechanism of the disk drive device shown in Fig. 2. Fig. 5 is a cross-sectional view showing a spindle motor in a state in which a bearing unit according to the present invention is assembled in a stator.
圖6係表示有關本發明的軸承單元之縱向剖面圖。 圖7係表示在徑向軸承内周面所形成的動壓力產生溝槽 之立體圖。 圖8係表示在一端表面動壓力產生溝槽所形成的徑向軸 承之立體圖。 圖9係表示動壓力產生溝槽所形成的止推軸承之立體 圖。Figure 6 is a longitudinal sectional view showing a bearing unit relating to the present invention. Fig. 7 is a perspective view showing a dynamic pressure generating groove formed on the inner peripheral surface of the radial bearing. Fig. 8 is a perspective view showing a radial bearing formed by a dynamic pressure generating groove on one end surface. Fig. 9 is a perspective view showing a thrust bearing formed by a dynamic pressure generating groove.
圖1 0係表示藉由回轉軸的外周面及設於外殼的軸插通 孔的内周面所形成的空隙之立體圖。 圖1 1係表示有關本發明的軸承單元的其他例子之縱向 剖面圖。 圖1 2係表示將表示組合使用於圖1 1之軸承單元的徑向 軸承、止推軸承及間隔構件的狀態之剖面圖。 圖1 3係表示有關本發明的軸承單元的另外其他例子之 縱向剖面圖。 圖1 4係表示有關本發明的軸承單元的另外其他例子之 縱向剖面圖。 -46- 1279062 42) 之 子 例 他 其 外 另 的 元 單 承 軸 的 明 發 本 關 有 示 。 表圖 係面 15剖 圖向 縱 之 子 例 他 其 外 另 的 元 單 承 抽 的 明 發 本 關 有 示 。 表圖 係面 6 J 1it口 圖 向 縱 剖塞 之閉 態部 狀底 的將 形而 成承 塑軸 外推 殼止 外置 將配 承殼 轴外 向於 徑對剖 於示之 對表能心 示係狀 表B 的 係 1 形 A圖成 17,塑 圖圖外 面部 圖 面 剖 將向 用縱 使之 示子 表例 係的 8 J 1 元 圖 單 承 # 的 體 軸 的 成 形 獨 單 片 出 突 與 部 轴 圖 面 局 之 體 軸 的 槽 溝 生 產 力 壓 置 設 片 出 突 於 示 表 係 9 11 圖 邊 這 面 底 的 片 出 突 的 槽 溝 生 £c一 力 壓 有 設 示 ο 表 圖係 體 2 立 圖 部 的軸体之局部立體圖。 圖2 1係表示將軸承單元定位於定子而組裝後的狀態的 主軸馬達之剖面圖。 圖2 2係表示設了作為為了於主軸馬達的定子定位、組裝 的組裝手段的卡住部的軸承單元之立體圖。 圖23係表示使用了固定軸體、且外殼這邊為能夠旋轉之 軸承單元的主軸馬達之剖面圖。 圖24係表示使用了具備靜電放電功能之軸承單元的主 軸馬達之剖面圖。 圖2 5係表示具備靜電放電功能的軸承單元之剖面圖。 圖26係表示使用了與本發明有關的軸承單元的主軸馬 達之剖面圖。 -47- 1279062Fig. 10 is a perspective view showing a gap formed by the outer peripheral surface of the rotary shaft and the inner peripheral surface of the shaft insertion hole provided in the outer casing. Fig. 1 is a longitudinal sectional view showing another example of the bearing unit of the present invention. Fig. 1 is a cross-sectional view showing a state in which a radial bearing, a thrust bearing, and a spacer member which are used in combination with the bearing unit of Fig. 11 are combined. Fig. 1 is a longitudinal sectional view showing still another example of the bearing unit of the present invention. Fig. 14 is a longitudinal sectional view showing still another example of the bearing unit of the present invention. -46- 1279062 42) The sub-examples of his other single-segment bearing shafts are shown. Table diagram The section of the section 15 is shown to the vertical section. The surface of the table is 6 J 1it, the closed view of the longitudinal section of the longitudinal section is formed into a plastic bearing shaft, and the outer casing is externally placed. The outer diameter of the bearing shell is shown in the opposite direction. The figure 1 of the system diagram B is shown as 17 , and the outer section of the drawing diagram is formed into a single piece of the body axis of the 8 J 1 element of the model. The groove productivity of the body axis of the protrusion and the axis diagram is set on the surface of the display system 9 11 . The bottom of the groove is formed by the groove. Partial perspective view of the shaft of the system 2. Fig. 2 is a cross-sectional view showing the spindle motor in a state in which the bearing unit is positioned in the stator and assembled. Fig. 2 is a perspective view showing a bearing unit in which a catching portion is provided as an assembling means for positioning and assembling the stator of the spindle motor. Fig. 23 is a cross-sectional view showing a spindle motor using a fixed shaft body and a bearing unit which is rotatable on the outer casing side. Fig. 24 is a cross-sectional view showing a spindle motor using a bearing unit having an electrostatic discharge function. Fig. 2 is a cross-sectional view showing a bearing unit having an electrostatic discharge function. Fig. 26 is a sectional view showing a spindle motor using a bearing unit relating to the present invention. -47- 1279062
(43) 圖2 7係表示使用了示於圖2 6主軸馬達的另外其他例子 的軸承單元之剖面圖。 圖2 8係表示使用了設有間隔片的外殼的軸承單元之爆 炸立體圖。 圖2 9係剖開徑向軸承而表示的軸承單元之***立體圖。 圖3 0係表示設於外殼的間隔片之立體圖。(43) Fig. 2 is a cross-sectional view showing a bearing unit using another example of the spindle motor shown in Fig. 26. Fig. 2 is a perspective view showing the explosion of the bearing unit using the outer casing provided with the spacer. Figure 2 is an exploded perspective view of the bearing unit shown by cutting the radial bearing. Figure 30 is a perspective view showing a spacer provided on the outer casing.
圖3 1係表示於設有間隔片的外殼組裝軸体、生產軸承單 兀的結構之工序圖。 圖式代表符號說明Fig. 3 is a process diagram showing a structure in which a shaft body is assembled to a casing provided with a spacer and a bearing unit is produced. Schema representation symbolic description
2,2a,2b 機殼 3 硬碟機 4,1 14,204,214,304 主軸馬達 5 磁頭 6 轉動型傳動裝置 7 磁頭支持臂 8 音圈 9 磁鐵 14 電路基板 11 支撐轴 12 連接端子 13 系統LSI (大型積體電路) 14 電路基板 15, 1 15 轉子 16,1 16 定子 -48· 1279062 (44) 17 轉 盤 18 挾 持 構 件 19 轉 子 磁 鐵 20, 120 轉 子 外 殼 21, 121 定 子 外 殼 22, 222 驅 動 線 圈 23 鐵 心 25 控 制 電 路部 26, 154 配 合 孔 28, 82 圓 筒 部 分 28a 卡 鉤 3〇, 80, 91,101, 130, 160,軸 承 單 元 230 ,300 ,330, 1060 51, 35 1, 1061 軸 體 52 安 裝 部 53, 3 5 3, 1068 軸 部 54, 3 54, 1069 突 出 片 55, 94,1 55, 1062 徑 向 軸 承 56, 86,1 56, 256, 1064 外 殼 58, 1063 止 推 軸 承 61a ,63a ,6 4a,261a,: 2 6 1 b,溝 槽 263a, 264a,3 63 a,364a 61,62,261,262,63,1062a第1動壓力產生溝槽 63,263,363,1062b 第2動壓力產生溝槽 1279062 (45)2,2a,2b Case 3 Hard disk drive 4,1 14,204,214,304 Spindle motor 5 Magnetic head 6 Rotary transmission 7 Magnetic head support arm 8 Voice coil 9 Magnet 14 Circuit board 11 Support shaft 12 Connection terminal 13 System LSI (large integrated circuit) 14 circuit board 15, 1 15 rotor 16, 1 16 stator - 48 · 1279062 (44) 17 turntable 18 holding member 19 rotor magnet 20, 120 rotor housing 21, 121 stator housing 22, 222 driving coil 23 core 25 control circuit unit 26, 154 mating hole 28, 82 cylindrical portion 28a hook 3〇, 80, 91, 101, 130, 160, bearing unit 230, 300, 330, 1060 51, 35 1, 1061 axle body 52 mounting part 53, 3 5 3, 1068 shaft part 54, 3 54, 1069 protruding piece 55, 94, 1 55, 1062 radial bearing 56, 86, 1 56, 256, 1064 housing 58, 1063 thrust bearing 61a, 63a, 6 4a, 261a,: 2 6 1 b, grooves 263a, 264a, 3 63 a, 364a 61, 62, 261, 262, 63, 1062a, first dynamic pressure generating grooves 63, 263, 363,1062b 2nd dynamic pressure generating groove 1279062 (45)
63b, 64b,261b,263b, 363b, 364b 64, 264, 364 65, 81, 95, 102, 111 66 67, 157 71, 271 72, 272 73 75,1 0 0 1, 1 067 77 79, 1070 83 90 103 264b, 第3動壓力產生溝槽 間隔構件 外部電極 潤滑油 外殼本體 底部封閉部 上部封閉部 軸插通孔 錐形部 空隙 環狀套筒 局部裝配 貫穿孔63b, 64b, 261b, 263b, 363b, 364b 64, 264, 364 65, 81, 95, 102, 111 66 67, 157 71, 271 72, 272 73 75,1 0 0 1, 1 067 77 79, 1070 83 90 103 264b, 3rd dynamic pressure generating groove spacing member external electrode lubricating oil housing body bottom closing portion upper closing portion shaft insertion hole taper portion gap annular sleeve partial assembly through hole
104 13 1 132 152 153 355 155 910 91 1104 13 1 132 152 153 355 155 910 91 1
突出部 段差部 鉚接部 安裝孔 線圈組裝部 結合用溝槽部 嵌合部 第1收藏支撐部 第2收藏支撐部 -50- 1279062 (46)Protruding section difference part Riveting part Mounting hole Coil assembly part Combination groove part Mating part First collection support part Second collection support part -50- 1279062 (46)
913 1000 1065 1066 1071, 1072 突出片收藏支撐部 間隔片 蓋子 封緘構件 連接部913 1000 1065 1066 1071, 1072 Tabs Collection Supports Spacers Covers Sealing Members Connections
-51--51-
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001326509A JP3925155B2 (en) | 2001-10-24 | 2001-10-24 | Bearing unit and motor having bearing unit |
JP2002034331A JP3736468B2 (en) | 2002-02-12 | 2002-02-12 | Bearing unit, motor and electronic device having bearing unit |
Publications (1)
Publication Number | Publication Date |
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TWI279062B true TWI279062B (en) | 2007-04-11 |
Family
ID=38645278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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TW91124434A TWI279062B (en) | 2001-10-24 | 2002-10-23 | Bearing unit, and motor using same |
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TW (1) | TWI279062B (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI453347B (en) * | 2011-12-21 | 2014-09-21 | 私立中原大學 | A lubrication control system for plain bearing keeping lubricant viscosity in design condition |
CN104810961A (en) * | 2014-01-28 | 2015-07-29 | 建准电机工业股份有限公司 | Motor with a stator having a stator core |
CN104810960A (en) * | 2014-01-27 | 2015-07-29 | 建准电机工业股份有限公司 | Motor with Thrust Bearing |
TWI509949B (en) * | 2013-12-31 | 2015-11-21 | Sunonwealth Electr Mach Ind Co | A motor with a thrust bearing |
US9543801B2 (en) | 2013-12-31 | 2017-01-10 | Sunonwealth Electric Machine Industry Co., Ltd. | Motor with thrust bearing |
TWI595729B (en) * | 2015-11-20 | 2017-08-11 | 三菱電機股份有限公司 | Electric motor |
TWI599150B (en) * | 2016-09-01 | 2017-09-11 | 昆山廣興電子有限公司 | Motor and dynamic pressure plate thereof |
TWI790636B (en) * | 2020-06-10 | 2023-01-21 | 日商大金工業股份有限公司 | electric motor |
-
2002
- 2002-10-23 TW TW91124434A patent/TWI279062B/en not_active IP Right Cessation
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI453347B (en) * | 2011-12-21 | 2014-09-21 | 私立中原大學 | A lubrication control system for plain bearing keeping lubricant viscosity in design condition |
TWI509949B (en) * | 2013-12-31 | 2015-11-21 | Sunonwealth Electr Mach Ind Co | A motor with a thrust bearing |
US9543801B2 (en) | 2013-12-31 | 2017-01-10 | Sunonwealth Electric Machine Industry Co., Ltd. | Motor with thrust bearing |
US9768651B2 (en) | 2013-12-31 | 2017-09-19 | Sunonwealth Electric Machine Industry Co., Ltd. | Motor with thrust bearing |
CN104810960A (en) * | 2014-01-27 | 2015-07-29 | 建准电机工业股份有限公司 | Motor with Thrust Bearing |
TWI563778B (en) * | 2014-01-27 | 2016-12-21 | Sunonwealth Electr Mach Ind Co | A motor with a thrust bearing |
CN104810960B (en) * | 2014-01-27 | 2017-10-17 | 建准电机工业股份有限公司 | Motor with thrust bearing |
CN104810961A (en) * | 2014-01-28 | 2015-07-29 | 建准电机工业股份有限公司 | Motor with a stator having a stator core |
CN104810961B (en) * | 2014-01-28 | 2017-05-10 | 建准电机工业股份有限公司 | Motor with a stator having a stator core |
TWI595729B (en) * | 2015-11-20 | 2017-08-11 | 三菱電機股份有限公司 | Electric motor |
TWI599150B (en) * | 2016-09-01 | 2017-09-11 | 昆山廣興電子有限公司 | Motor and dynamic pressure plate thereof |
TWI790636B (en) * | 2020-06-10 | 2023-01-21 | 日商大金工業股份有限公司 | electric motor |
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MM4A | Annulment or lapse of patent due to non-payment of fees |