200900197 九、發明說明： 【發明所屬之技術領域】 本發明有關於一種電動直接驅動裝置，其係特別適合 用於譬如工具機或處理系統的轉台。 【先前技術】 一種用於工具機之圓形平台的旋轉支承裝置係譬如由 德國專利第DE 10 2〇〇5 024 004 A1號而為人所知。此種裝 置k么、種用於直接以電氣方式驅動該圓形平台之轉矩電 ' 動機。該習知圓形平台之轉矩電動機被具體化為永久磁鐵 勵磁之盤形轉子。 【發明内容】 發明之目的 本發明係基於明確指定一種旋轉式電動直接驅動裝置 之目的，且與先前技術相較下具有延長使用之可能性，並 伴隨著有效率製造之可能性及高階之機械精確度。 , 此目的係根據本發明藉著具有申請專利範圍第丨項之 U 特徵的電動直接驅動裝置所達成。此直接驅動裝置具有一 基本上旋轉式對稱之中心圓柱體及二個轉子元件，該等轉 子元件係相對於中心圓柱體同軸地配置，並可彼此獨立地 旋轉。該中心圓柱體較佳地係體現成一個零件，但亦可由 複數個零件所構成，尤其是由二零件所構成。於兩種情況 中省中〜圓柱體之中空結構係有利的，該結構係允許嬖 如流體之媒介物沿著該直接驅動裝置的對稱此軸經過該中 空結構饋送。另-選擇係，該中心圓柱體之實心結構也是 6 200900197 所古Γ、π就是說在軸向方向中沒有連續開口的結構。在 月况中，置少其中一個轉子元件能被連接至一轉台。 ^ 種Ν况中，轉子元件係藉著一電動直接驅動器、 :1疋-轉矩電動機所驅動。為了要相對於中心圓柱體以 二轉了式切轉子元件，於每—情況中，提供至少—轴承、 寸別疋;袞料承。滚韩承以及餘㈣、係可能當作滚動 ^承。於第—種論及的情況中，該等軸承較佳地係多列的200900197 IX. Description of the Invention: [Technical Field] The present invention relates to an electric direct drive device which is particularly suitable for use in a turntable such as a machine tool or a processing system. [Prior Art] A rotary support device for a circular platform for a machine tool is known, for example, from German Patent No. DE 10 2 5 024 004 A1. Such a device is used to directly drive the torque of the circular platform. The torque motor of the conventional circular platform is embodied as a disk rotor excited by a permanent magnet. SUMMARY OF THE INVENTION The present invention is based on the object of specifying a rotary electric direct drive device, and has the possibility of prolonged use compared with the prior art, with the possibility of efficient manufacturing and high-order machinery. Accuracy. This object is achieved according to the invention by means of an electric direct drive having the U feature of the scope of the patent application. The direct drive has a substantially rotationally symmetrical central cylinder and two rotor elements that are coaxially disposed relative to the central cylinder and that are rotatable independently of each other. The central cylinder is preferably embodied as a single part, but may also be formed from a plurality of parts, in particular consisting of two parts. It is advantageous in both cases to save the hollow structure of the cylinder, which allows a medium such as a fluid to be fed through the hollow structure along the axis of symmetry of the direct drive. In addition - the selection system, the solid structure of the central cylinder is also 6 200900197, π is the structure without continuous openings in the axial direction. In the month of the month, one of the rotor elements can be connected to a turntable. In this case, the rotor element is driven by an electric direct drive, a 1疋-torque motor. In order to cut the rotor element in two revolutions relative to the central cylinder, in each case, at least - bearing, inch, and weir are provided. Rolling Han Cheng and Yu (4), may be regarded as rolling. In the case of the first class, the bearings are preferably multi-column
角滾珠軸承，而當滚柱被用作滚動軸承時，該等軸承較 查地係被具現為軸向/徑向的圓柱形滾柱軸承。在所有情況 中’该等滾動轴承具有内部環圈，該等内部環圈係與該中 體之單圓柱形表面相接觸、軸向地配置於該等電 :直接驅動器之間。該中心圓柱體之圓柱形表面係允許能 I有效率地製造電動直接驅動裝置，同時提供個別滚 動軸承之精密的同軸向配置，其中該圓柱形表面係以均勻 方式被建構，且滚動轴权内料圈係西己置在該圓柱形表 面上。 磁阻電動機係適合用作譬如是電動直接驅動器。然而， 電動直接驅動器較佳地是體現為同步電動機，且每個直接 驅動器的一個可被通電的主要元件係以旋轉固定之方式連 接至該中心圓柱體，而該轉子元件則被體現為一永久磁鐵 勵磁之次要零件。用於偵測該等次要零件之角度及/或旋 轉速率的裝置較佳地係軸向地配置於該等次要零件之間。 根據較佳實例，被提供用於支撐該等次要零件之所有 轴承係軸向地配置於該等電動直接驅動器之間。分配於個 7 200900197 別之轉子兀件、特別是滾動軸承、的軸承之間的短轴向距 離在此處特別有助於使介於各種旋轉軸承之間的角度偏移 或軸向偏移減至最小的程度。於特別較佳的結構中，以旋 轉固定方式連接至該中心圓柱體之所謂較子部件而係在 :側面上於該軸向方向中眺連該中心圓柱體，而具有該等 疋子部件之至少其中之—的單_零件設計的中心、圓柱體亦 疋可能的。每個定子部件係連接至一電動直接驅動器的一 主要零件或係完全相同的。該電動直接驅 在此較佳地具有相同之直徑。 軸向地配置於該等定子部件之間的中心圓柱體具有完 整的圓柱形表面’該圓柱形表面被該等轴承所徑向地圍 繞。如果滾㈣承被㈣軸承，被提供用來支擇該等轉子 -件的所有滾動軸承之所有内部環圈係安農在該中心圓柱 體之圓柱形表面上。二個轉子元件相對彼此配置之精確产 係因此與定子部件被附接至中心圓柱體的準破性無關。較 佳的是’-環狀止動表面係設在其中一個定子部件上，今 環狀止動表面係垂直於直接驅動裝置的對稱主轴，且盆中 -個滚動軸承的㈣環圈係承抵著該止動表面，而 ΐ供來支撐其中-㈣子元件的對應滾動軸承係以精確界 疋的角定位來配置。被設置來支撐該第二個轉子元件的第 :滾動軸承之内部環圈可直接地支承抵靠著第—個滚動軸 承之内部環圈。另一選擇係’可能譬如於二個内部環圈之 間配置-個面板’該面板係特別適用於緊固至少一個用於 測量角度及/或旋轉速率的測量頭部。在所有情況中，於 8 200900197 %狀止動表面的方向中的軸向作用力可藉由在正好其中一 個疋子部件處的螺固連接而被施加至所有的内部環圈。 根據一特定實例，被提供用於支撐該等轉子元件之滾 動軸承係形成三環圈或多環圈的軸承，且其中一個轉子2 件係連接至-巾介環圈，且另—轉子元件係連接至三環圈 軸承或多環圈軸承之外部環圈，而該軸承的一内部環圈較 佳地係直接配置在中心圓柱體之圓柱形表面上。 根據-項發展，並未使用滾動軸承，以無接觸的方式 操作之軸承係被用來支撐該等轉子元件。以無接觸方式操 作的軸承係總體地被了解為用作流體軸承，也就是說空氣 軸承及液壓軸承，特別是流體動力軸承以及磁性軸承。於 磁性軸承之情況中，這些軸承較佳地係藉由控制磁力而被 進行阻尼。此種軸承被稱為主動磁性軸承。再者，組合的 滾動及磁性軸承系統係可能用於支撐該等轉子元件。一種 滾動/磁性軸承系統原則上被揭示於譬如德國專利申請案第 10 2006 053 041.1 號中。 本發明之優點特別在於以下事實：二個或更多個電動 直接驅動的轉子係藉著軸承、較佳地是滚動轴承、而精確 地被引導，該等軸承係配置在一基本上旋轉對稱、較佳地 是套筒形狀元件的連續圓柱形安裝部件上，該係易於操 作，其中可輕易地達成實際運轉及軸向運轉的高程度準確 性、旋轉主軸的小翻滾誤差及令人滿意的同心性、以及高 度剛性。就此情況而言，能於個別的同軸向直接驅動器之 間實現極小的轴向距離。 9 200900197 將 例 在下文中參考圖式更詳細地說明本發明多個示範實 【實施方式】 參考=或作用相同元件在所有的圖中被標以相同之元件 口兄月於圖1及圖2中的電動直接驅動裝置ί包括—個 ί 空的中心圓桎體2’其基本上係相對於一對稱主軸 為旋轉對稱；及-也1 _ί;杜 對稱…紅 此等元件係相對於該 '㈣軸地配置。該中心圓柱體2係剛性地連接至一 連接結構（未11示於圖中）。每個轉子元件3、4都可藉著一 電動直接驅動器5、6而被驅動。該等直接驅動器/ 6每 :都被體現為一轉矩電動機，其係使一個可被通電的主要 零件7、8係連接至該中心圓柱體2,而分配的次要零件9、 1 〇係配備有永久磁鐵。一轉台能被附接至每個轉子元件3、 4，使得一個雙旋轉轉台係整體地形成有二個轉台，該等 二個轉台每個都可彼此獨立地定位。 / 設有滾動軸纟U、12，用於以可旋轉方式支撐該等次 要零件9、10,該等滾動軸承被體現為預加應力的、二列 的斜角滾珠軸承，且接受轴向及徑向作用力兩者。該等滚 動軸承11、12係軸向地配置於電動直接驅動器5、6之間， 該等驅動器的繞組係以元件參考符號13、14表示。 第一定子部件15被螺固至中心圓柱體2 _端的端面 上，且第二定子部件1 6被螺固至另一端部上。二個定子 部件15、16冑為中空設計，也就是說套筒形狀，如同中 200900197 中心圓柱體2具有一圓柱形外部表面17。該 心圓柱體2 等滾動軸承11、12具有内部環圈18、19及被連接至該等 次要料9、1G之外部環圈2G、21，該等滚動轴承係配置 在此由單一元件所形成的表面17上。 轴向地位於該等繞組13、14及相關的次要零件9 ' 之間’在此有一角度測量農£ 22 ’其較佳地係被體現成一 個絕對值角度傳送器。再者’一磨平及部分重疊的面板23Angular ball bearings, and when the rollers are used as rolling bearings, these bearings are now axial/radial cylindrical roller bearings. In all cases, the rolling bearings have inner rings that are in contact with the single cylindrical surface of the intermediate body and are axially disposed between the direct drives. The cylindrical surface of the central cylinder allows for efficient manufacture of the electric direct drive while providing a precise co-axial configuration of the individual rolling bearings, wherein the cylindrical surface is constructed in a uniform manner and the rolling shaft The inner ring is placed on the cylindrical surface. Reluctance motors are suitable for use as, for example, electric direct drives. However, the electric direct drive is preferably embodied as a synchronous motor, and a main element of each direct drive that can be energized is connected to the central cylinder in a rotationally fixed manner, and the rotor element is embodied as a permanent Minor parts for magnet excitation. Preferably, the means for detecting the angle and/or the rate of rotation of the secondary parts are axially disposed between the secondary parts. According to a preferred embodiment, all of the bearings provided to support the secondary components are axially disposed between the electrically powered direct drives. The short axial distance between the bearings of the other rotor components, in particular the rolling bearings, is particularly helpful here to reduce the angular offset or axial offset between the various rotary bearings. The minimum extent. In a particularly preferred construction, the so-called sub-parts that are connected to the central cylinder in a rotationally fixed manner are attached to the side cylinder in the axial direction, and have the tweezers At least the center of the single-part design, the cylinder is also possible. Each of the stator components is connected to a major part of an electric direct drive or is identical. The electric direct drive preferably has the same diameter here. The central cylinder axially disposed between the stator members has a complete cylindrical surface' which is radially surrounded by the bearings. If the (four) bearing (four) bearing is provided, all of the inner rings of all the rolling bearings provided for the selection of the rotor-piece are on the cylindrical surface of the central cylinder. The precise production of the two rotor elements relative to one another is thus independent of the quasi-breaking nature of the stator components being attached to the central cylinder. Preferably, the '-annular stop surface is attached to one of the stator members. The annular stop surface is perpendicular to the symmetrical main axis of the direct drive and the (four) ring bearing of the rolling bearing Against the stop surface, the corresponding rolling bearing that is supplied to support the -(iv) sub-element is configured with an angular position of the precise boundary. The inner ring of the first rolling element is configured to support the inner ring of the rolling bearing to directly support the inner ring of the first rolling bearing. Another option is to 'configure a panel between two inner loops' which is particularly suitable for fastening at least one measuring head for measuring the angle and/or the rate of rotation. In all cases, the axial force in the direction of the 8 200900197% stop surface can be applied to all of the inner loops by a screw-on connection at exactly one of the latch members. According to a specific example, a rolling bearing provided to support the rotor elements forms a three-ring or multi-ring bearing, and one of the rotors 2 is connected to the towel ring and the other rotor element is connected To the outer ring of the three-ring bearing or the multi-ring bearing, an inner ring of the bearing is preferably disposed directly on the cylindrical surface of the central cylinder. According to the development of the item, rolling bearings are not used, and bearings that are operated in a contactless manner are used to support the rotor elements. Bearing systems that operate in a contactless manner are generally understood to be used as fluid bearings, that is, air bearings and hydraulic bearings, particularly fluid dynamic bearings and magnetic bearings. In the case of magnetic bearings, these bearings are preferably damped by controlling the magnetic force. Such bearings are referred to as active magnetic bearings. Furthermore, a combined rolling and magnetic bearing system may be used to support the rotor elements. A rolling/magnetic bearing system is disclosed in principle in, for example, German Patent Application No. 10 2006 053 041.1. The advantages of the invention are in particular the fact that two or more electrically driven rotors are precisely guided by bearings, preferably rolling bearings, which are arranged in a substantially rotationally symmetrical manner Preferably, it is a continuous cylindrical mounting member of a sleeve-shaped member which is easy to handle, wherein a high degree of accuracy in actual operation and axial operation, a small rollover error of the rotating spindle, and satisfactory Concentric, and highly rigid. In this case, a very small axial distance can be achieved between individual in-line direct drives. 9 200900197 In the following, a plurality of exemplary embodiments of the present invention will be described in more detail below with reference to the drawings. [Reference] or the same elements are labeled in the same figure in all the figures in Figures 1 and 2 The electric direct drive device ί includes a ί empty central circular body 2' which is substantially rotationally symmetrical with respect to a symmetrical main axis; and - also 1 _ ί; symmetry ... red such elements are relative to the '(4) Axial configuration. The central cylinder 2 is rigidly connected to a connecting structure (not shown in the drawings). Each of the rotor elements 3, 4 can be driven by an electric direct drive 5, 6. The direct drives / 6 are each embodied as a torque motor that connects a main part 7, 8 that can be energized to the central cylinder 2, and the assigned secondary part 9, 1 Equipped with permanent magnets. A turret can be attached to each of the rotor members 3, 4 such that a dual rotary turret is integrally formed with two turrets, each of which can be positioned independently of each other. / with rolling axes 纟 U, 12 for rotatably supporting the secondary parts 9, 10, which are embodied as pre-stressed, two-row angled ball bearings, and accept axial and Both radial forces. The rolling bearings 11, 12 are axially disposed between the electric direct drives 5, 6, and the windings of the drives are indicated by reference numerals 13, 14. The first stator component 15 is screwed to the end face of the center cylinder 2 _ end, and the second stator component 16 is screwed to the other end. The two stator parts 15, 16 are hollow, that is to say the sleeve shape, as in the middle of 200900197, the central cylinder 2 has a cylindrical outer surface 17. The rolling cylinders 11, 12 such as the core cylinder 2 have inner rings 18, 19 and outer rings 2G, 21 connected to the secondary materials 9, 1G, where the rolling bearings are arranged by a single component Formed on the surface 17. Axially located between the windings 13, 14 and the associated secondary part 9' there is an angle measurement that is preferably embodied as an absolute angle transmitter. Again, a flattened and partially overlapping panel 23
係軸向地位於該等滾動軸承u、12之間，至少一測量頭Μ 係附接至該面23，該面板係當作—部份的角度測量裝置 22而與在該等次要零件9、1()上的測量刻度尺25互相作 用。 所有的内部環圈18、19及面板23係藉由螺絲％而整 個下壓抵抗著在定子部件15上之止動面27,該止動面係 相對於對稱主軸s垂直地配置。第二定子部件16並未裝 配至中心圓柱體2上，且與螺絲28連接，直到該等二個 滾動軸承11、12及該等二個次要零件9、1〇被完全地安 裝好為止。支承著繞組14的第二定子部件16並未與任何 —個内部環圈18、19相接觸。該等電動直接驅動器5、6 被個別地以流體冷卻，且為了此目的而被連接到流體管線 2 9、局部地與角元件3 0相連接。 於根據圖3及圖4的示範實例中，設有圓柱形滚柱軸 承11、12 ’具體地說是軸向/徑向圓柱形滾柱軸承，而不 是斜角滾珠軸承，用於支撐該等轉子元件3、4。以名稱為 YRT及RTC而為人所知的軸向/徑向圓柱形滾柱軸承係 11 200900197 譬如來自德國Herzogenaurach、Schaeffler KG的“滚動軸 承目錄（20〇6年1月）第992頁等等。特別有利的是使用 具有整合式測量系統的軸向/徑向軸承來當作軸承丨j、 12具有整合式測量系統的軸向/徑向軸承係譬如來自上 文提到之滾動軸承目錄（第1〇2〇頁等等）之以名稱YRTM而 為人所知的。於根據圖3及施4之示範實例令，並沒有一 面板、也沒有某一附接零件係位於該等二個轴承丨丨、12 之間。每個軸承U、12的二個測量頭24係配置成偏移18〇 度，以致於可以藉著測量技術來補償可能的偏心度。角度 測量裳置22係、-種磁性限制、軸承整合式、增量的角度 測量系統。該測量系統22的磁性角分度係以一種材料结 合的方式設在該等軸承u、12之外部環圈2〇、2ι上。與 光=測量系統作比較’完全地整合於軸承n、12之中的 :夏系統22 #供了特別與冷卻之潤滑劑及滾 有關的在堅固性方面的優點。此外，當每圓周具有譬如34〇8 增量（視軸承的直徑而定）的角分解度時，該角度測 置”統22具有非常節省空間的設計。 根據圖5及圖6的轉實例亦具有—用於切 兀件3、4的滾動軸承。於此情況中，直 圈1 8 , Λ 3早—内部環 、—中"環圈32及一外部環圈33的二 係藉由舳圣η 幻―?衣圈轴承31 承1、I2形成。雖然徑向地配置於内部 與外部環圈33之間的中介環圈32係連接至第衣圈1 8 3,第二轉子元件4係永久地連接至外部環—子元件 於三環圈7¾ 11 。因此， 圈軸表31之區域中，一重疊部份係在軸 问方向中 12 200900197 形成於二個轉子元件3、4之間。於根據圖5及圖6之示 範實例中’該三環圈轴承31被體現為一滾柱轴承，但滾 珠亦可被提供當作三環圈軸承31之滾動主體。 在攸上文所说明之示範實例的基本偏離中，根據圖7 及圖8之直接驅動袭置並不具有任何用於支料子元件3、 4之滾動軸承’而是具有以無接觸方式操作的軸承丨卜η。 在根據圖7及圖8沾;^ ^ 汉口 S的配置中，這些係連接至一 線％、且藉著-徑向間隙34及一軸向間隙35(未 :明:而广許該等轉子元们、4之徑向及轴向引導作用的 工 空氣軸承U、12可被體現為預加應力的軸承’ 二別是藉由磁力所預加應力的空氣軸承。該等空氣軸承 、12之預加應力亦可藉由彈簧力所產生。或者，磁性軸 =流體靜力軸承係可能當作以無接觸方式操作的袖承 12 1於切料轉子元件3、*。在磁性軸承I!、η :Γ2這些抽承能被體現為以永久磁鐵操作的被動式 1現為㈣是以可被通電之線圈操作的主動阻尼 式磁性軸承的軸承。 【圖式簡單說明】 圖；圖1係電動直接驅動裝置之第—示範實例的剖面說明 圖2係根據圖1之裝置的平面圖； 圖3係類似於圖1之雷 說明圖； 之電動直接驅動裝置的第二實例之 之說明平面圖； 圖4係類似於圖2之根據圖3的裴置 13 200900197 圖5係類似於圖1之電動直接驅動裝置的第三示範實 例之說明圖； 圖6係類似於圖2之根據圖5的裝置之說明平面圖； 圖7係類似於圖1之電動直接驅動裝置的第四示範實 例之說明圖，及 圖8係類似於圖2之根據圖7的裝置之說明平面圖。 【主要元件符號說明】 1 電動直接驅動裝置 2 中心圓柱體 3 轉子元件 4 轉子元件 5 電動直接驅動器 6 電動直接驅動器 7 主要零# 8 主要零件 9 次要零件 10 次要零件 11 軸承 12 軸承 13 繞組 14 繞組 15 第一定子部件 16 第二定子部件 17 圓柱形表面 14 200900197 18 内部環圈 19 内部環圈 20 外部環圈 21 外部環圈 22 角度測量裝置 23 面板 24 測量頭 25 測量刻度尺Is axially located between the rolling bearings u, 12, at least one of which is attached to the face 23, the panel being used as part of the angle measuring device 22 and in the secondary part 9, The measurement scales 25 on 1() interact. All of the inner rings 18, 19 and the face plate 23 are pressed down against the stop faces 27 on the stator part 15 by means of screws %, which are arranged perpendicularly to the axis of symmetry s. The second stator member 16 is not attached to the center cylinder 2 and is coupled to the screw 28 until the two rolling bearings 11, 12 and the two secondary parts 9, 1 are completely installed. The second stator component 16 that supports the windings 14 is not in contact with any of the inner rings 18, 19. The electric direct drives 5, 6 are individually fluid cooled and, for this purpose, are connected to the fluid line 29 and are locally connected to the corner element 30. In the exemplary embodiment according to FIGS. 3 and 4, cylindrical roller bearings 11, 12' are provided, in particular axial/radial cylindrical roller bearings, instead of beveled ball bearings, for supporting such Rotor elements 3, 4. Axial/radial cylindrical roller bearing system known as YRT and RTC 11 200900197 For example, "Rolling Bearing Catalogue (January 2000), page 992 from Herzogenaurach, Schaeffler KG, Germany, etc. It is particularly advantageous to use an axial/radial bearing with an integrated measuring system as the bearing 丨j, 12 with an integrated measuring system for the axial/radial bearing system, such as from the rolling bearing catalog mentioned above ( The first page, and so on, are known by the name YRTM. In the exemplary example according to Figures 3 and 4, there is no one panel and no attached parts are located in the two Between the bearings 丨丨, 12. The two measuring heads 24 of each of the bearings U, 12 are configured to be offset by 18 degrees so that the possible eccentricity can be compensated by measurement techniques. - Magnetic limit, bearing integrated, incremental angle measuring system. The magnetic angular indexing of the measuring system 22 is provided on the outer rings 2, 2 of the bearings u, 12 in a material combination. Compared with the light=measurement system' is completely integrated Among the bearings n, 12: the summer system 22 # provides special advantages in terms of robustness in relation to the cooling lubricant and the roll. In addition, when each circumference has an increment of 34〇8 (depending on the diameter of the bearing) The angle measuring system 22 has a very space-saving design. The embodiment according to Figs. 5 and 6 also has a rolling bearing for cutting the jaws 3, 4. In this case, the two series of the straight circle 1 8 , Λ 3 early-internal ring, - middle "ring 32 and an outer ring 33 are formed by the 舳 η ― ? 衣 轴承 bearing 31 bearing 1, I2 . Although the intermediate ring 32 disposed radially between the inner and outer collars 33 is coupled to the first collar 13 3 , the second rotor element 4 is permanently coupled to the outer ring - the secondary member is the third ring 73⁄4 11 . Therefore, in the region of the circle axis table 31, an overlapping portion is in the axial direction. 12 200900197 is formed between the two rotor members 3, 4. In the example according to Figs. 5 and 6, the three-ring bearing 31 is embodied as a roller bearing, but the ball can also be provided as a rolling body of the three-ring bearing 31. In the basic deviation of the exemplary embodiment described above, the direct drive according to FIGS. 7 and 8 does not have any rolling bearing for the sub-members 3, 4 but has a bearing that operates in a contactless manner.丨 η. In the configuration according to Figs. 7 and 8; ^^ Hankou S, these are connected to a line %, and by the radial gap 34 and an axial gap 35 (not: Ming: and the rotor elements are widely available) The radial air and axial guiding working air bearings U, 12 can be embodied as pre-stressed bearings. 'Two are air bearings pre-stressed by magnetic force. These air bearings, 12 pre- The stress can also be generated by the spring force. Alternatively, the magnetic shaft = hydrostatic bearing can be used as a sleeve 12 1 in the contactless manner in the cutting rotor element 3, *. In the magnetic bearing I!, η :Γ2 These pumping can be embodied as passive 1 operated by permanent magnets. (4) Bearings with active damped magnetic bearings that can be operated by coils that are energized. [Simplified diagram] Figure 1 is an electric direct drive BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a plan view of the apparatus according to FIG. 1. FIG. 3 is a cross-sectional view similar to that of FIG. 1. A plan view of a second example of the electric direct drive apparatus; FIG. Figure 13 according to Figure 3, the device 13 200900197 Figure 5 is a class Figure 3 is an explanatory view of a third exemplary embodiment of the electric direct drive device of Figure 1; Figure 6 is a plan view similar to the device of Figure 5 according to Figure 5; Figure 7 is a fourth example of an electric direct drive similar to Figure 1 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 8 and FIG. 8 are plan views similar to the apparatus of FIG. 7 according to FIG. 7. [Explanation of main components] 1 Electric direct drive 2 Central cylinder 3 Rotor component 4 Rotor component 5 Electric direct drive 6 Electric Direct drive 7 Main zero # 8 Main part 9 Minor part 10 Minor part 11 Bearing 12 Bearing 13 Winding 14 Winding 15 First stator part 16 Second stator part 17 Cylindrical surface 14 200900197 18 Inner ring 19 Inner ring 20 External ring 21 External ring 22 Angle measuring device 23 Panel 24 Measuring head 25 Measuring scale
26 螺絲 27 止動表面 28 螺絲 29 流體管線 30 角元件 31 三環圈軸承 32 中介環圈 33 外部環圈 34 徑向間隙 35 軸向間隙 36 空氣供給管線 S 對稱主軸 1526 Screw 27 Stop surface 28 Screw 29 Fluid line 30 Corner element 31 Three-ring bearing 32 Intermediate ring 33 External ring 34 Radial clearance 35 Axial clearance 36 Air supply line S Symmetrical spindle 15