M303071 八、新型說明： 【新型所屬之技術領域】 本新型是關於一種刀具夾持梦 人行衣置，特別是指一種 在工具機之主軸上並能組接刀具 乂 僂# $ 77目+ θ 吏主軸之旋轉動力得以 傅遞至刀具之工具機之刀具夾持裝置。 【先前技術】 叙工具機例如加工機，其用 叮从w 用逆相當廣泛，通常包含 一可繞者自身軸線旋轉之主軸，哕 梦署士姓 曰山 〇亥主軸能藉由一刀具夾持 十枝壯m 寻遞至主軸時，該刀具 夾持袭置即能帶動所夾持之刀具旋 一 % ^ Ίλ 對工件進行例如 •鑽孔、搪孔、銑削等加工製程。 如圖1所示’是—種f知刀具夹持襄置丨，乃安裝在一 工具機之主軸（圖未示）上且用於夾固—刀具1〇，可帶動刀呈M303071 VIII. New description: [New technical field] The new type is about a tool holder dreaming clothes, especially one on the spindle of the machine tool and can be connected to the tool 乂偻# $77 mesh + θ 吏The rotational power of the spindle is transferred to the tool holding device of the tool machine of the tool. [Prior Art] A machine tool, such as a processing machine, is widely used for twisting from w. It usually contains a spindle that can rotate around its own axis. The name of the 哕山〇海 spindle can be clamped by a tool. When the ten-strong m is found to the spindle, the tool clamping can drive the clamped tool to rotate by one % ^ Ί λ to perform machining processes such as drilling, boring, and milling on the workpiece. As shown in Figure 1, the tool holder is placed on a spindle (not shown) of the machine tool and used for clamping - the tool 1〇 can drive the knife to
10隨著主軸旋轉，並包含_组接 A 、，且接在所述主軸底端的中空刀 把11、一伸入刀把i丨且供刀呈 /、插置的中空筒夾12、一 嵌套在該筒夾12外圍的中空環 及一螺接在刀把11 底部並頂抵環圈η以定位筒纟12的螺帽14。 該刀把11包括一繞著一直立舳 軸線111之内環面112， 及一底部具有複數外螺紋113之外 之外％面114。該内環面112 具有一位在底段且逐漸往下擴大之錐導部115。 δ亥同爽12包括'一繞著古女缸钟11 1 者°亥軸線111且對應嵌入該錐導部 115 之錐彼部 121、一 "fe ^ I# ^ 1 0 . 认〜 隹雔瓜邛121下方且徑向朝内縮束 的疋位部122、一位在定位部19 P 122下方且徑向朝外凸伸的尾 端部123，及數條分別由一底娃 底‘軸向往上剖切的剖溝124， 5 M303 071 二t::!124間形成一個央持刀具的夾爪i25。該錐嵌 ，、配合錐導部115之錐度且逐漸往下擴大之外錐 面 126。 該環圈13為一金屬環片， 部122外圍。 疋甘欠卡在該筒夾12之定位10 as the main shaft rotates, and includes _ assembly A, and the hollow knives 11 attached to the bottom end of the main shaft, a hollow collet 12 that protrudes into the knives and the knives are inserted, and a nested A hollow ring at the periphery of the collet 12 and a nut 14 screwed to the bottom of the handle 11 and abut against the ring n to position the cartridge 12. The blade 11 includes an inner annulus 112 about an upright axis 111 and a bottom face 114 having a plurality of external threads 113 at the bottom. The inner annulus 112 has a tapered guide 115 that is enlarged at the bottom and gradually downward. δ海同爽12 includes 'one around the ancient female cylinder clock 11 1 '°H axis 111 and corresponding to the cone portion 121 embedded in the cone guide 115, a "fe ^ I# ^ 1 0 . a clamping portion 122 below the melon 121 and radially inwardly contracting, a tail end portion 123 extending below the positioning portion 19 P 122 and radially outward, and a plurality of bottom shafts respectively The upwardly cut section 124, 5 M303 071 2t::!124 forms a jaw i25 of the central holding tool. The cone is embedded, and the taper of the tapered guide 115 is fitted and the outer tapered surface 126 is gradually enlarged downward. The ring 13 is a metal ring piece, and the portion 122 is peripheral. The position of the stagnation card in the collet 12
X累1¾ 14包括—螺接在該外環面ιΐ4外圍的鎖接部 141及自鎖接部141底緣徑向朝内凸伸且抵托在環圈η 底部的托抵部142。該鎖接部141具有複數形成在一内周面 且對應與外螺紋113螺接的内螺紋143。 在安裝時，先將環圈13套置在定位部122夕卜且將螺 f 14套置在環圈13與筒夾12外，然後將筒夾12之錐嵌 置入於刀把11之錐導部115，並將螺帽之鎖接部 ⑷螺接在刀把心卜，此時即可將刀具10往上插置在筒夾 12之各夾;K 125間，而後再旋轉螺帽14，令托抵部142往 上頂抵環圈13移動筒夹12，將筒夾12頂推深入該刀把Η 中，同時，該錐嵌部⑵亦會相對受到錐導部ιΐ5之束缚， 而使夾爪125逐漸往内收合以夾持刀具1〇。 上述刀具线裝置1雖然能將刀具10錢在主軸上， 然而在使用上卻具有下列不理想之處： -、夾緊效果不佳：組接時’並非整個筒夾12都央緊 刀具1〇’由於僅有錐嵌部121受到錐導部115之束缚而夾 緊刀具Η)’至於錐嵌部121的下方則未產生往内夹抵刀且 1〇之夾持力’因此該筒夾12用以夾持刀具1〇的長度相對 較短，夾緊效果往往難以達到理想。 6 M303071 二、筒夹易受損··由於刀具10只有在對應錐嵌部12ί 的部份被緊固夾持，其下段部位則呈懸空失依的狀態，因 此當動力傳遞至刀具夾持裝置丨，而帶動刀具高速旋轉時， 將會造成刀具10未被夾持之下段部位發生晃動的情況，當 使用一段時間之後，刀具10往往會由對應錐嵌部121之底 緣處開始產生斷裂，而此斷裂部份容易會撞擊到筒夾Μ之 内壁面，導致筒夹12損傷的情況，所以安全性不佳。 三、不具導正對位效果··該刀把11與筒夾12間並未設 有導正構造，所以在組接時，容易造成筒夾12歪偏置入刀 把11的現象，因而會使加工精度受到影響。 【新型内容】 因此，本新型之目的係在提供一種具有較佳夾持效果 之工具機之刀具夾持裝置。 本新型之次一目的係在提供一種能維持筒夾安全之工 具機之刀具夾持裝置。 （ 種具導正對位效果之工 本新型之又一目的係在提供一 具機之刀具夾持裝置。 於是’本新型工具機之刀 具機之一主軸下方且用於央持 著主軸旋轉，該刀具夾持裝置 一螺帽。 具夹持裝置，是安裝在該工 一刀具，以連同刀具一起隨 包含：一刀把、一筒夾，及 該刀把是銜接在所述主 線之中空壁體，並包括一内 面界定而成的安裝孔，該内 轴的下方，為一繞著一直立軸 環面、一外環面，及一由内環 環面具有一位在底段且逐漸往 M3 03 071 土 下錐導部，該錐導部相對於軸線之錐度為： ' %面具有複數形成在底段上的外螺紋。 该筒夾是插入該刀把之忠 可用於夾持所述刀具，㈠著::部凸露出刀把外 括一對應嵌入該錐導部之錐嵌部、一位在錐嵌 :!、：中介形成在錐她受抵部之間且徑向朝内= 的疋位# ’及數條分別由—底端軸向往上剖切且内外連 ==在_剖溝間形成—個夹持刀具的夾爪 甘入1有-配合錐導部且逐漸往下擴大 部具有-逐漸往下縮小的受抵面。 °亥又抵 中空;m:::夹定位在刀把上，為-繞著該軸線的 w垃、一徑向朝内凸伸且套置在該定位部外圍 的銜接部、一自檢;&立β 4k丨立人 ㈤ 圍的鎖^ 延伸且螺接在該外環面外 …。，卩-形成在銜接部下方且對應 該鎖接部具有複數形成在-内周面且對應1: 漸往下縮小之_面。 又抵面且逐 當_螺巾胃使之向上移料，該頂推 ::導:筒夾往上推入該安裝孔’同時，該錐嵌部:會: 。束縛而逐漸内移收合’以穩固地相對夹持刀具 【實施方式】 、有關本新型之4述及其他技術内容、特點與功效 以下配合參考圖式及較佳實施例料細說明中，將可清楚 M303071 的呈現。 如圖2與圖3所示，本新型工具機之刀具夹持裝置之 較佳實施例，是安裝在該工具機之一主轴（圖未示）下^且用 於夾持-刀具2，以連同刀具2 一起隨著主軸旋轉，藉該刀 具2類型的改變，可以改變對工件加工的形式，惟此部份 構造與本新型内容無關，所以不再說明，而且本新型之^ 良重點也和主軸構造及其他構件無關，因此亦不再現明 而該刀具爽持裝置包含：一刀把3、—筒夹4,及—螺帽。5 〇 該刀把3是銜接在該主軸的下方，為—繞著—直 線之中空壁體，並包括一内環面32、—外環面μ，及 -由内環面32界定而成的安裝孔34。該内環面η具有— 位於底段上方且各橫向截徑皆相同之直導部321，及一 直導部321下方且逐漸往下擴大之錐導部似 322相對於軸線31之錐度 + 。The X-flux 14 14 includes a locking portion 141 screwed around the outer ring surface ι 4 and a bottom abutting portion 142 projecting radially inward from the bottom edge of the self-locking portion 141 and abutting against the bottom of the ring η. The locking portion 141 has a plurality of internal threads 143 formed on an inner peripheral surface and correspondingly screwed to the external thread 113. During installation, the ring 13 is first placed on the positioning portion 122 and the screw f 14 is placed outside the ring 13 and the collet 12, and then the cone of the collet 12 is embedded in the cone guide of the handle 11. a portion 115, and screwing the lock portion (4) of the nut to the handle of the cutter, at this time, the cutter 10 can be inserted upward into each clip of the collet 12; K 125, and then the nut 14 is rotated, The abutting portion 142 moves the collet 12 toward the top abutting ring 13 to push the collet 12 into the blade holder ,, and at the same time, the taper portion (2) is also restrained by the cone guide portion ι 5, thereby causing the jaws 125 is gradually folded inward to clamp the tool 1〇. Although the above-mentioned tool line device 1 can put the tool 10 on the main shaft, it has the following unsatisfactory in use: - The clamping effect is not good: When assembling, not the entire collet 12 is tightly clamped. 'Because only the tapered insert portion 121 is restrained by the tapered guide portion 115 to clamp the cutter Η) 'As for the lower portion of the tapered fitting portion 121, there is no clamping force that is clamped inwardly and 1 '. Therefore, the collet 12 The length used to hold the tool 1 相对 is relatively short, and the clamping effect is often difficult to achieve. 6 M303071 2. The collet is easily damaged. · Since the cutter 10 is only clamped and clamped in the part corresponding to the cone insert 12ί, the lower part is in a suspended state, so the power is transmitted to the tool holding device.丨, when the tool is driven to rotate at a high speed, the tool 10 will not be shaken by the lower portion of the clamp. After a period of use, the cutter 10 tends to break from the bottom edge of the corresponding cone insert 121. However, the broken portion is likely to hit the inner wall surface of the collet, causing the collet 12 to be damaged, so that the safety is not good. Third, there is no guiding alignment effect. · The knife handle 11 and the collet 12 are not provided with a guiding structure. Therefore, when assembling, it is easy to cause the collet 12 歪 to be biased into the knife handle 11, which will cause processing. Accuracy is affected. [New content] Therefore, the object of the present invention is to provide a tool holding device for a machine tool having a better clamping effect. A second object of the present invention is to provide a tool holding device for a tool that maintains the safety of the collet. (A further object of the present invention is to provide a tool holding device of an machine. Then the 'tool of the new machine tool' is below the main shaft and is used to hold the main shaft. The tool holding device has a nut. The clamping device is mounted on the tool, and is included with the tool: a knife handle, a collet, and the knife handle is connected to the hollow wall of the main line, and The utility model comprises a mounting hole defined by an inner surface, the lower part of the inner shaft is an annular surface around the vertical axis, an outer annular surface, and a ring surface of the inner ring has a bit at the bottom section and gradually goes to the M3 03 071 soil a lower taper guide having a taper with respect to the axis: '% of the face has a plurality of external threads formed on the bottom section. The collet is inserted into the handle to hold the cutter, (1): : a convex portion of the knives is externally embedded with a cone-embedded portion corresponding to the tapered guide portion, and one of the cones is embedded in the cone: !, : an intermediate formed between the abutting portion of the cone and radially inward = 疋 position # ' and Several strips are respectively cut from the bottom end axially upwards and the inner and outer joints are == - the jaws of the clamping tool are inserted into the one-fitted cone guide and gradually the downwardly enlarged portion has a receiving surface that is gradually reduced downwards. The angle of the sea is also hollow; the m::: clip is positioned on the handle. a wrap around the axis, a radially inwardly projecting portion and a self-inspection that is placed around the periphery of the positioning portion; & a locking of the β4k丨立(五) Outside the outer annular surface, the 卩- is formed under the engaging portion and corresponds to the locking portion having a plurality of - formed on the inner peripheral surface and corresponding to 1: gradually decreasing downward. The stomach of the towel makes the material move upwards, the pushing:: guiding: the collet is pushed up into the mounting hole', and the conical inserting portion: will: shackle and gradually move the retracting 'to firmly hold the knives relatively [Embodiment] The description of the present invention and other technical contents, features and functions will be described below with reference to the drawings and the detailed description of the preferred embodiment. As shown in Fig. 2 and Fig. 3, A preferred embodiment of the tool holding device of the new machine tool is mounted on a spindle (not shown) of the machine tool and is used for clamping - The tool 2, together with the tool 2, rotates with the spindle. By changing the type of the tool 2, the form of machining the workpiece can be changed. However, the part of the structure is irrelevant to the present invention, so it is not explained, and the present invention is The good focus is also independent of the spindle structure and other components, so it is not reproduced. The tool holding device comprises: a knife handle 3, a collet 4, and a nut. 5 〇 the knife handle 3 is connected below the main shaft a hollow wall of a straight line, and includes an inner annular surface 32, an outer annular surface μ, and a mounting hole 34 defined by the inner annular surface 32. The inner annular surface η has a bottom The straight guide portion 321 above the segment and each of the transverse cross-sectional diameters is the same as the straight guide portion 321 below the straight guide portion 321 and gradually enlarged downward, like the taper of the 322 with respect to the axis 31.
、卜 〜 该外％面33 I ❿ 有複數形成於底段的外螺紋33 1。 “ 該筒夾4是插入該刀把3之安裝孔34且底部凸露出刀 二夕、’可用於夾持該刀具2 ’為-繞著該軸線31的中* 並包括-能配合嵌入直導部321的導正部Μ、二 成在該導正部41下方且對應嵌入該錐導部切 》 、一位在錐嵌部42下方且凸露屮 入口P 42 “ 卜方且凸路出刀把3外的受抵部43、 中介形成在錐嵌部42與 - 二部44’及數條分別Η端軸向往 一與錐嵌部42且内外連通的剖溝-在兩相:剖 9 M3 03 071 溝45間形成—個夾持刀具2的央爪46。該錐嵌部42具有 導部322之錐度且逐漸往下擴大之外錐面421。該 - -有逐漸往下縮小的錐狀受抵面431，該受抵 面431相對於軸線31之錐度心為60。。 該螺帽5用於將筒夹4定位在刀把3上，為一繞著該 U 1 #中空帽體’並包括—徑向朝内凸伸且套置在該定 4 P 44外圍的衡接部51、一自銜接部Μ外緣向上延伸且, b ~ The outer % face 33 I ❿ has a plurality of external threads 33 1 formed in the bottom section. "The collet 4 is inserted into the mounting hole 34 of the handle 3 and the bottom protrudes from the knife. The 'can be used to clamp the tool 2' is - in the middle of the axis 31 and includes - can fit into the straight guide The guiding portion Μ2, 321 of the 321 is below the guiding portion 41 and correspondingly embedded in the tapered guiding portion, and one is below the tapered fitting portion 42 and the convex opening P 42 "b" and the convex path exiting the knife handle 3 The outer abutting portion 43 is formed in the conical fitting portion 42 and the second portion 44', and the plurality of respective end portions are axially connected to the conical fitting portion 42 and communicated with the inner and outer portions of the groove-in two phases: section 9 M3 03 071 A central claw 46 that grips the cutter 2 is formed between the grooves 45. The tapered fitting portion 42 has a taper of the guide portion 322 and gradually enlarges the outer tapered surface 421. This has a tapered receiving surface 431 which is gradually reduced downward, and the tapered surface of the abutting surface 431 with respect to the axis 31 is 60. . The nut 5 is used for positioning the collet 4 on the handle 3, and is a wrap around the U 1 # hollow cap 'and includes a radially inwardly projecting and sleeved on the periphery of the fixed 4 P 44 a portion 51, one extending from the outer edge of the connecting portion
=在該外環面33之底段外圍的鎖接部Μ，及—形成在銜 / 51下方且對應頂推該受抵部μ的頂推部^。該鎖接 部Μ具有複數形成在一内周面且對應與外螺紋如螺接的 内螺紋521 °而該頂推部53則具有一錐度配合受抵面431 且逐漸往下縮小之内推面531。 欲將刀具2組接至主軸下方時，先將螺帽$套置結合 Π夾4上’讓銜接部51卡接在定位部^外圍，再將兩 者-起對應放置在刀把3下方，令導正部Μ直立嵌入直導 M2卜且令錐嵌部42置入錐導部322，並將螺帽$之鎖 接部52頂段稍微螺接在外環面33上，如此即將筒夾4组 接在刀把3上，續將所選刀4 2向上插人筒夾4中且位在 f爪46間’而後即能轉動螺帽5向上移動，此時，該頂推 部Μ即會·該受抵部43 ’將筒夹*往上推人該安裝孔 34 ’同時，該錐嵌部42亦會受到錐導部322之束缚而逐漸 内移，使該等夾爪46收合，以穩固地夾持刀具2。相同道 要更換刀具2時，只要反向旋鬆螺帽5 ’即可帶動筒夾 4向下移動，並逐步相對的放鬆刀具2，以供換裝刀具2。 10 M303071 當然在組接上，亦可先將刀具2插入筒爽4中，之後再將 筒夾4與螺帽5 一起組接在刀把3底部，在此不再詳細說 明0 點：由以上說明可知，本新型乃具有下列較習知為佳之優 -、夾緊效果較佳：本㈣在設計上，除了藉由錐導 邛322束缚錐嵌部42之外， ^ 更利用頂推邛53頂抵托持該 又抵4 43，使得整個筒夾4 门又4都文到向内的作用力，能全面 夾抵刀具2，因此用以夾持刀呈 達到較佳的夾緊效果。、度相對較長’所以能 緊固之安全性較佳：由於本新型之筒夾4是整個 ’、丈持〃、2，因此當高速旋轉時，若刀且2 义 生斷妒日车，# 右刀具2因晃動而發 峤衣時，僅會由對應整個筒 ^ ^ , 之底邛處，亦即相對於 又抵。卩43之底緣下方開始 掊敏;Μ位+ 座王鲫衣而此斷裂部份並不會 到湾夹4，故能維持筒夹安全，使用安全性較佳。 二、具導正對位效果·本新型是在該刀把3中 導口卩321，並在筒夾4 有直 n… 有導正部41，故當組接時， 即此易於讓導正部41直立嵌 * 偏的現象，因此户， ¥°卩321，而不會發生歪 精度。 u具導正對位效果，能維持加工 明：知，本新型之刀具編 月匕具有卓父佳之夾緊教I μ 1工 生導正對位效果，確〜、 安全性較佳，以及能產 丁位效果，確貫能夠達到本 新型不僅是前所未有之創 的，因此，本 更可供產業上利用。 11 M303071 、所述者’僅為本新型之較佳實施例而已，當不 能以此限定本新型實施之範圍，即大凡依本新型中請專利 範圍及說明内容所作之簡單的等效變化與修飾 新型專利涵蓋之範圍内。 本 【圖式簡單說明】 圖1是一種習知工具機之刀具夾持裝置之一部份組合 剖視圖； 圖2是本新型工具機之刀具夾持裝置之一較佳實施例 的一立體分解圖；及 圖3是該較佳實施例之一部份組合剖視圖。 12 M303071 【主要元件符號說明】= a locking portion 外围 at the periphery of the bottom portion of the outer annular surface 33, and a urging portion formed under the frame / 51 and correspondingly pushing the abutting portion μ. The locking portion Μ has a plurality of internal threads 521° formed on an inner circumferential surface and corresponding to the external thread, and the urging portion 53 has a taper fitting receiving surface 431 and gradually reduces the inner pressing surface. 531. When the tool 2 is to be connected to the lower part of the main shaft, the nut is first placed on the clamp 4, and the engaging portion 51 is snapped to the periphery of the positioning portion, and then the two are placed under the handle 3, so that The guide portion Μ is uprightly embedded in the straight guide M2 and the tapered insert portion 42 is placed into the tapered guide portion 322, and the top portion of the lock portion 52 of the nut $ is slightly screwed onto the outer annular surface 33, so that the collet 4 is The set is connected to the handle 3, and the selected cutter 4 2 is inserted into the collet 4 and positioned between the f-claws 46, and then the nut 5 can be rotated upwards. At this time, the push-up portion will be The abutting portion 43' pushes the collet* upwardly to the mounting hole 34'. At the same time, the conical insert portion 42 is also gradually restrained by the conical guide portion 322, so that the clamping jaws 46 are folded. Hold the tool 2 firmly. When the tool 2 is to be replaced, the collet 4 can be moved downward by simply unscrewing the nut 5 ′, and the tool 2 is gradually released relative to the tool 2 for replacement. 10 M303071 Of course, in the group connection, the cutter 2 can also be inserted into the cylinder 4 first, and then the collet 4 and the nut 5 are assembled together at the bottom of the handle 3, and no further details will be given here: 0 It can be seen that the present invention has the following advantages and is better - the clamping effect is better: (4) In design, in addition to binding the cone insert 42 by the cone guide 322, ^ Responding to the holding of the 4,43, the entire collet 4 door and 4 to the inward force, can fully clamp the tool 2, so the clamping knife is used to achieve a better clamping effect. The degree is relatively long, so the safety of tightening is better: since the collet 4 of the present type is the whole ', holding the 〃, 2, when the high-speed rotation, if the knife and the 2 shengsheng break the Japanese car, # When the right cutter 2 is swayed by the sway, it will only correspond to the bottom of the entire cylinder ^ ^ , which is opposite to the other. Starting from the bottom edge of 卩43, Min Min; Μ position + 鲫王鲫衣 and this broken part will not go to Bay clamp 4, so it can maintain the safety of the collet and the safety of use is better. Second, with the positive alignment effect. The new type is the guide port 321 in the knife handle 3, and there is a straight n in the collet 4... There is a guiding portion 41, so when it is assembled, it is easy to make the guiding portion 41 upright embedded * partial phenomenon, so the household, ¥ ° 321 321 without 歪 precision. u has a positive alignment effect, can maintain the processing of the Ming: know, this new type of tool 编 匕 has Zhuofu Jia's clamping teaching I μ 1 worker guide positive alignment effect, indeed ~, better security, and The production of the Ting effect, the true ability to achieve this new model is not only unprecedented, so this is more available for industrial use. 11 M303071, which is merely a preferred embodiment of the present invention, should not limit the scope of the present invention, that is, the simple equivalent change and modification of the patent scope and description in the present invention. Within the scope of the new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional view showing a tool holding device of a conventional machine tool; FIG. 2 is an exploded perspective view of a preferred embodiment of the tool holding device of the machine tool of the present invention; And Figure 3 is a partial cross-sectional view of the preferred embodiment. 12 M303071 [Description of main component symbols]
2···........刀具 3...........刀把 31 .........轴線 32 .........内環面 321 .......直導部 322 .......錐導部 33 .........外環面 331 .......外螺紋 34 .........安裝孔 Θ 1 ..........錐度 421 .......外錐面 43 .........受抵部 431 .......受抵面 44 .........定位部 45 .........剖溝 46 .........夾爪 Θ 2..........錐度 5...........螺帽 51.........銜接部 52·........鎖接部 4...........筒炎 41 .........導正部 42 .........錐嵌部 521 .......内螺紋 53.........頂推部 531 .......内推面2···........Tools 3...........Knife handle 31 .........Axis 32 ......... Inner ring Face 321 ....... straight guide 322 .. cone guide 33 ... ... outer annulus 331 .... external thread 34 ... ......Installation hole Θ 1 .......... taper 421 ....... outer cone surface 43 ... ... the abutment portion 431 .... ...receiving surface 44 ......... positioning portion 45 ... ... cutting groove 46 ... ... jaw jaw 2 ... .... taper 5......... Nut 51.........Connecting part 52·........Locking part 4..... ...... tube inflammation 41 ......... guide 42 ... ... cone embedded portion 521 ... ... internal thread 53..... .... ejector 531 ....
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