丄JZJZUO 九、發明說明： 【發明所屬之技術領域】 本發明係_—種综合加4心機所用以固定刀具之螺帽筒夫結 構，更詳而言之’係指-種具有對稱之結構，以維持主轴旋轉之平衡， 從而提昇刀具之加工精度者。 【先前技術】 隨著工業科技的演進，综合加工中心機已廣泛用於精密零組件的生 產；而為達成精密加工之目的，首先必須提高工具機的各主要組件— 特別是主轴組件的精度。主轴組件的性能是影響工具機加工品質與生 產效率極其重要__素1主轴迴轉精度又是影響主轴組件性能 的最基本指標’其具趙影響表現在工件的「加工精度」和「表面粗糖 度上」。因此，如何提高主轴迴轉精度是非常重要的一項技術。螺帽筒 夾結構為峰組件之-，其作祕錢持刀具，俾使刀具於主轴旋轉 中保持平穩。如第-圖至第三圖可見者，為—習知螺帽筒央結構，其 主要包含-筒夾(80)及一螺帽(90)。其中，該筒夾(80)係為空心，以軸 向L伸刀具夾孔(S1)以供一刀具柄部(11〇)穿設其中並具有一第一錐 面(82)及-第二錐面(83)，其間以一環狀凹槽_連接；各該錐面㈣㈣ 並設有若干㈣延伸之讀(85)，俾使該筒夾具有微向伸縮之效 用。而該螺帽(90)係活動套設於該筒夾⑽之外圍，以一片狀卡止凸緣 (91)與該筒夹(80)之環狀凹槽㈣卡合，其並具有一内螺紋部(92)，俾與 刀座(100)之外螺紋部(1〇1)活動鎖合。據此，當該螺帽(9〇)與該筒夾(8〇) C S ) 5 1323206 "" 結合，使一刀具柄部(110)穿伸於該筒炎(80)刀具失孔(81)後，將該螺帽 (90)向該刀座(1〇〇)鎖合，即可微幅徑向迫緊該筒夾(8〇)與該刀具柄部 (110)之夾固關係。 . 於此習知之螺帽筒夾結構中，為便利該筒夾(80)活動卡設於該螺帽 , (90) ’該螺帽(90)之片狀卡止凸緣(91)係為相對於該螺帽轴心之偏心設 計’如第二所示。當使用者欲將筒夾(80)置入螺帽(9〇)時，首先使該筒 夾(80)以其軸心偏離該螺帽(90)軸心之位置將該筒夹(8〇)之第二錐面⑻) • 向該螺帽(90)内部伸入，而使該環狀凹槽(8句相對於該筒(9〇)之卡止凸 緣(91) ’其後將該筒夾(80)軸心對應該螺帽(9〇)轴心，因此該卡止凸緣(91) 可容置於部分之環狀凹槽(84)中，從而達成將該筒夾(8〇)活動組設於該 螺帽(90)之目的。 然而，此等習用之設計具有不利於主軸加工精度之缺點；其係由於 該螺帽㈣之#狀卡止凸緣(9⑽偏設於該獅崎-侧，使得螺帽(9〇) 本身之質量重心無法對應其軸心位置而偏倚於一側。如此一來，當工 鲁 具機主軸以高轉速運作時’挾持刀具柄部(1G1)之螺簡夾結構將導致 刀具旋轉時產生跟隨螺帽(90)質量重心偏移，無法達成絕對平衡，此等 偏移即便财極傭度，亦足崎加工精度造紐重之影響。 是以’如何提供-種維持主抽旋轉之平衡，從而提昇刀具之加工精 度之筒夾螺帽結構，乃為本發明創作之目的。 【發明内容】 本發明係為-具有對稱之偏心結構之職，其可達成之主要功效， 6 係以相對於該螺帽轴心對稱之設計使其鎖合於主轴刀座上隨同主轴旋 轉時保持質量重心平衡，從而提昇刀具之加工精度。 為達成上述之目的及功效，本發明螺帽筒夾結構主要包含· 一筒夾；其内部軸向延伸-刀具夾孔以供一刀具柄部穿設其中具 有二第-錐面及-第二錐面，其間以—環狀凹槽連接；各該錐面並設 有若干切槽，俾使簡从錢赌向伸縮之朗·以及 一螺帽；其内侧周具有至少二等距龍設置之突出卡止部，用以 與該筒夾之環肋槽卡合，其並具有—㈣_，俾與1合加工中 心機刀座之外螺紋部活動鎖合；該螺帽之特徵在於其二徑向相對之突 出卡止部具有完全相同之尺寸與形狀。 【實施方式】 由於本發明係揭露一種具對稱設計之螺帽筒炎結構其中所利用 到螺帽筒夾結構之詳細製造或處理過__技術來達成，故於 下述說明中，並*作完整描述，下述内文所參照之圖式僅在表達 與本發明有關之結構倾，未錢據實際之糊尺寸⑼♦製，合先 敘明》 第圖本發明主要為配合一综合加工中心機使用以挾持7] 、螺帽筒夾結構。卿姻夾結構包含_筒娜）；其㈣轴向延伸 夾孔(11)以供一刀具柄部㈣見第八圖)穿設其中具有一第一部 面^一第二錐面⑼，其間以一環狀凹槽⑽連接;各該錐面(聊 於該筒失轴向長度之切槽(15)，俾使該筒夾(1G)具有微ti 1323206 4' 徑向伸縮之效用。 本發明之特徵係在具有對稱結構之聰⑽^請見第，至第七 圖’根據本發明’該螺帽内部圓周具有二徑向相對之突出卡止部⑵）， 用以與該筒夾⑽之環狀凹槽(14)卡合，其並具有—内螺紋部㈤，俾 與-綜合加工中心機刀座(30)之外螺紋部⑼活動鎖合；該螺帽⑽之 特徵在於其二徑向相對之突出卡止部(21)具有完全相同之尺寸與形狀。 本發明巾崎稱之突ώ卡止部(21)之定義方式係如料圖所示， 鲁 於該螺帽(20)轴心、㈧之兩側取二圓心(C1)及(C2)。該二圓心(⑶及㈣ 與螺帽(20)轴心(A)各具有一第一距離㈣及(D2)，其中該第一距離㈣ 與(D2)係為相等。而後由圓心(C1)及(C2)，分別以一第二距離(幻)與(们） 為半徑，定義出二圓弧部(211)與(212)，其中，該第二距離(ri)與㈣ 係為相等且大於各該第一距離(D1)與(m),則兩圓弧部(2ιι)與即)可 相切父集於二對稱於該螺帽(2〇)軸心⑷之點，即定義出本發明之二對 稱犬出卡止部(21) ’使其位置及尺寸相對於麟帽(2_心、(A)呈現對稱 鲁 關係，因而達成本發明螺帽(2〇)具有徑向對稱結構與質量之目的。 據此，當使用者欲將筒夾(1〇)置入螺帽(20)時，首先使該筒夾(1〇) 以其轴心偏離該螺帽(2〇)轴心之位置將該筒夾(10)之第二錐面(13)向該 螺帽(2〇)内部伸入，而使該環狀凹槽(14)相對於該筒(20)之突出卡止部 (21)，其後將該筒失(1〇)軸心對應該螺帽(2〇)轴心，因此該突出卡止部 可容置於部分之環狀凹槽(14)中，如第八及第九圖所示，從而達成將該 筒夾(10)活動組設於該螺帽(2〇)之目的。 8 如此-來’由於該螺帽(20)之突出卡止部⑼係稱設於該螺帽内 部’使得螺帽⑽本身之質量重心職於其轴錄置㈣致偏倚於一 側因而§工具機主轴以南轉速運作時，挾持刀具柄部(4〇)之螺帽筒爽 結構可確保刀具旋轉時不致產生質量重心偏移，從而達成旋轉中之平 衡，因此確保加工精度。 以上所舉實施僅用以說明本案而已，非用以限制本案之範圍，精 於此技藝者能在不脫離本_神與範#做各種不_式的改變。舉 凡不違本隸神所從事的種種修改或變化，俱>1本案申請專利範圍。 【圖式簡單說明】 第-圖係習用螺帽筒爽結構之組裝示意圖。 第二圖係習用螺帽筒夹結構之螺帽上視圖。 第三圖係習用螺帽筒失結構之組裝剖視圖。 第四圖係本發明職筒夾結構之組裝示意圖。 第五圖係本發__缝構之_上視圖。 第/、圖係本發明螺崎夾結構中螺帽H丨視圖，係沿第五圖 中6-6剖面線繪製。 第七圖係本發_帽肢結構巾獅之第二$麵，係沿第五圖 中7-7剖面線繪製。 第八圖係本發_帽肢結構之軸向組裝剖視圖。 第九圖係本發明螺_失結構之徑向組裝剖視圖 ，係沿第八圖中 9-9剖面線繪製。 1323206 第十圖係本發明螺帽筒夾結構中螺帽之上視圖，說明該突出卡止 部之定義方式。 【主要元件符號說明】 軸心(A) 外螺紋部(31) 圓心(C1)、（C2) 刀具柄部(40) 距離(Dl)、（D2) 前案筒夾(80) 半徑(Rl)、（R2) 前案刀具夾孔(81) 筒夾(10) 前案第一錐面(82) 刀具夾孔(11) 前案第二錐面(83) 第一錐面(12) 前案環狀凹槽(84) 第二錐面(13) 前案切槽(85) 環狀凹槽(14) 前案螺帽(90) 切槽(15) 片狀卡止凸緣(91) 螺帽(20) 前案内螺紋部(92) 突出卡止部(21) 前案刀座(100) 圓弧部(211)(212) 前案外螺紋部(101) 内螺紋部(22) 前案刀具柄部(110) 刀座(30)丄JZJZUO IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a nut-cutter structure for fixing a tool, and more specifically, a system having a symmetrical structure. In order to maintain the balance of the spindle rotation, thereby improving the machining accuracy of the tool. [Prior Art] With the evolution of industrial technology, integrated machining centers have been widely used for the production of precision components. For the purpose of precision machining, the accuracy of the main components of the machine tool, especially the spindle components, must first be improved. The performance of the spindle assembly is extremely important to affect the machining quality and production efficiency of the tool. __1 Spindle rotation accuracy is the most basic indicator affecting the performance of the spindle component. The influence of the influence of the Zhao on the workpiece's "machining precision" and "surface roughness" on". Therefore, how to improve the spindle rotation accuracy is a very important technology. The nut collet structure is the peak component - it is used as a secret tool to keep the tool stable during the spindle rotation. As can be seen from the first to third figures, it is a conventional nut body structure, which mainly comprises a collet (80) and a nut (90). Wherein, the collet (80) is hollow, and the cutter hole (S1) is extended in the axial direction L for a cutter handle (11〇) to be inserted therein and has a first tapered surface (82) and a second The tapered surface (83) is connected by an annular groove _; each of the tapered surfaces (4) and (4) is provided with a plurality of (four) extended readings (85), so that the collet has the effect of microscopic expansion and contraction. The nut (90) is sleeved on the periphery of the collet (10), and the one-piece locking flange (91) is engaged with the annular groove (4) of the collet (80), and has a The internal thread portion (92) is movably locked to the external thread portion (1〇1) of the holder (100). Accordingly, when the nut (9〇) is combined with the collet (8〇) CS) 5 1323206 "", a cutter handle (110) is extended through the tube (80) tool loss hole ( 81), the nut (90) is locked to the seat (1〇〇), and the clamping relationship between the collet (8〇) and the tool handle (110) can be tightly pressed in a slight radial direction. . In the conventional nut collet structure, in order to facilitate the movement of the collet (80) to the nut, (90) 'the nut-shaped locking flange (91) of the nut (90) is The eccentric design relative to the nut axis is as shown in the second. When the user wants to put the collet (80) into the nut (9〇), first the collet (80) is offset from the axis of the nut (90) by the collet (8〇). The second tapered surface (8)) • extends into the interior of the nut (90) such that the annular groove (8 terms relative to the locking flange (91) of the barrel (9〇) will thereafter The collet (80) is axially aligned with the nut (9〇) axis, so the locking flange (91) can be received in a portion of the annular groove (84), thereby achieving the collet ( 8〇) The active group is set for the purpose of the nut (90). However, these conventional designs have disadvantages that are not conducive to the accuracy of the spindle machining; due to the #-shaped locking flange (9 (10) of the nut (4) On the shizaki-side, the center of gravity of the nut (9〇) itself cannot be biased to one side corresponding to its axial position. Thus, when the machine shaft is operated at high speed, the tool handle is held. The screw clamp structure of (1G1) will cause the center of gravity of the follower nut (90) to shift when the tool rotates, and the absolute balance cannot be achieved. These offsets are affected by the accuracy of the processing of the foot. Is 'how to provide - The invention relates to a collet nut structure for maintaining the balance of the main drawing rotation, thereby improving the machining precision of the tool. The invention is the object of the invention having the symmetrical eccentric structure, which can be achieved mainly. Efficacy, 6 is designed to be symmetrical with respect to the axis of the nut, so that it can be locked on the spindle seat to maintain the balance of mass center of gravity when the spindle rotates, thereby improving the machining accuracy of the tool. To achieve the above object and effect, the present invention The nut collet structure mainly comprises: a collet; the inner axial extension-tool clamping hole is provided for a cutter handle to have a second-cone surface and a second conical surface therein, and an annular groove therebetween Connecting; each of the tapered surfaces is provided with a plurality of slots, such that the Jane is smuggled from the money and a nut; and the inner circumference has a protruding locking portion provided by at least two equidistant dragons for the barrel The ring rib groove of the clip is engaged, and has (-) _, the 俾 is movably locked with the threaded portion of the machine tool holder; the nut is characterized in that the two diametrically opposed protruding portions are identical Size and shape. Embodiments of the present invention are disclosed in the following description, as described in the following description, in which a nut-like structure having a symmetrical design is disclosed in which a detailed manufacturing or processing of the nut collet structure is utilized. Description, the drawings referred to in the following texts only express the structure related to the present invention, and the amount of money is not according to the actual paste size (9) ♦ system, the first description of the first chart. The present invention is mainly for a comprehensive machining center machine Used to hold the 7], nut collet structure. The Qing marriage clamp structure contains _tube Na; its (4) axially extending the clamping hole (11) for a tool shank (four) see the eighth figure) a surface of a second tapered surface (9) connected by an annular groove (10); each of the tapered surfaces (talking about the axial length of the cylinder (15), so that the collet (1G) has Micro ti 1323206 4' effect of radial expansion. The invention is characterized in that it has a symmetrical structure (10), see the seventh, and the seventh figure 'according to the invention', the inner circumference of the nut has two diametrically opposite protruding locking portions (2) for engaging the collet (10) The annular groove (14) is engaged, and has an internal thread portion (5), and the external threading portion (9) of the integrated machining center machine seat (30) is movably locked; the nut (10) is characterized by The two diametrically opposed protruding latches (21) have exactly the same size and shape. The method of defining the abrupt locking portion (21) of the towel of the present invention is as shown in the drawing, and the two centers (C1) and (C2) are taken on both sides of the nut (20) axis and (8). The two centers ((3) and (4) and the nut (20) axis (A) each have a first distance (4) and (D2), wherein the first distance (4) is equal to (D2). Then the center (C1) And (C2), defining a second arc portion (211) and (212) with a second distance (magic) and (the) radius, wherein the second distances (ri) and (4) are equal and If the first distances (D1) and (m) are greater than the first distances (D1) and (m), the two arc portions (2 ιι) and the tangential portion may be tangent to the point at which the second axis is symmetric with respect to the axis (4) of the nut (2), that is, defined The second symmetric dog-out locking portion (21) of the present invention has a position and a size that is symmetric with respect to the cap (2_heart, (A), thus achieving radial symmetry of the nut (2〇) of the present invention. For the purpose of structure and quality. Accordingly, when the user wants to put the collet (1〇) into the nut (20), the collet (1〇) is first deviated from the nut (2〇) by its axis. The position of the axis extends the second tapered surface (13) of the collet (10) into the nut (2〇), and the annular groove (14) protrudes relative to the barrel (20) The locking portion (21), after which the shaft is lost (1〇), the shaft center corresponds to the nut (2〇) axis, so the protruding locking portion can accommodate In the partial annular groove (14), as shown in the eighth and ninth views, the purpose of assembling the collet (10) to the nut (2〇) is achieved. 8 So-to' Since the protruding locking portion (9) of the nut (20) is said to be disposed inside the nut, the quality of the nut (10) itself is centered on its axis recording (4), which is biased to one side, and thus the south speed of the machine tool spindle During operation, the nut-cooling structure of the tool shank (4〇) ensures that the center of gravity of the tool does not shift when the tool rotates, thus achieving a balance in rotation, thus ensuring machining accuracy. The above implementation is only used to illustrate the case. However, it is not intended to limit the scope of this case. It is true that those skilled in the art can make various changes without escaping from this _God and Fan#. Anything that does not violate the various modifications or changes made by Lishen, 1 The patent application scope of this case. [Simple description of the drawing] The first figure is the assembly diagram of the nut-cooling structure of the conventional nut. The second figure is the upper view of the nut of the conventional nut collet structure. The third figure is the conventional nut cap. Disassembled sectional view of the structure. The fourth figure is the structure of the job cartridge of the present invention. The fifth figure is the upper view of the __stitch of the present invention. The first and the figure are the view of the nut H丨 in the sturdy clip structure of the present invention, which is drawn along the 6-6 section line in the fifth figure. The seventh figure is the second face of the lion's body structure lion, which is drawn along the 7-7 section line in the fifth figure. The eighth figure is the axial assembly sectional view of the hair _ cap structure. The radial assembly cross-sectional view of the screw-lost structure of the present invention is drawn along the 9-9 section line in the eighth figure. 1323206 The tenth view is a top view of the nut in the nut collet structure of the present invention, illustrating the protruding locking portion Definition of the way. [Description of main component symbols] Axis (A) Male thread (31) Center (C1), (C2) Tool shank (40) Distance (Dl), (D2) Front collet (80) Radius (Rl), (R2) Front tool hole (81) Collet (10) Front case first cone (82) Tool hole (11) Front case second cone (83) First cone ( 12) Front case annular groove (84) Second tapered surface (13) Front case groove (85) Annular groove (14) Front case nut (90) Groove (15) Sheet-shaped locking flange (91) Nut (20) Front threaded part (92) Protruding locking part (21) Front case (100) Arc portion (211) (212) Front external thread portion (101) Internal thread portion (22) Front tool holder (110) Tool holder (30)