1313208 九、發明說明： 【發明所屬之技術領域】 本案與工具機刀桿失頭有關，更詳而言之，是一種提高該失頭失緊力 及防鬆脫功能之設計。 【先前技術】 -般工具機如綜合中心切削機、車床、鑽床.·...·等，其刀具係被—夹 頭夾制並帶動。-種習知的夾頭樣態，基本上是係以—本體連接於工作母 機之動力軸，該本體内設有數個斜導孔，每—斜導孔中設—夹爪，失爪外 部面設螺紋段，共與-設於本體外之鶴環㈣紋環㈣合，轉純 環，可控制該夾爪於本體中進退移動，以夾制或鬆釋刀具。工作母機之動 力軸以相同關緊該鶴__方向_，轉該本體、Μ、驅動产 以及刀具同步旋轉。 衣 該驅動環係控制該夾爪夾制或鬆釋刀具之關鍵結構，驅動環緊射夹 爪，才能使刀具穩定地於工作面作工。意即，若驅動環稍有鬆動，爽^ 失去緊制刀具的能力。然而當刀具作用社作㈣，—個相對於刀具作工 反方向糊妓爾_，糊_力細紅做力增加 為明顯’當刀具工作阻力過大，致該反向的翻力已大於驅動環緊制夹爪 之旋向力時，會造成該驅動環鬆動，夾爪即失去緊制刀具之处力 僅無法突破該工作阻力，更必需中斷程序處理刀具及夾頭的=二= 意檢視工作面是否因刀具鬆動而受到破壞。 而/ 由上述之制，顯㈣見的是該料頭不財高絲力 鬆脫的功能。 邮止刀具 5 1313208 【發明内容】 在加程序中貝不奋許上述刀具鬆動的情形發生，因此提高央頭的夹 緊力以及加強預防其受加工阻力時鬆脫是為必要之措施。 本案所提出的_脫及高央緊力之工具機刀桿夹頭，包含： -中軸，财轴之轴身外部設有—制動部； 一推桿，可㈣運動地接合於該中軸之-端部；1313208 IX. Description of the invention: [Technical field to which the invention belongs] This case is related to the loss of the tooling tool holder, and more specifically, it is a design to improve the loss of the head and the anti-loose function. [Prior Art] - Tool machines such as integrated center cutting machines, lathes, drill presses, etc., whose tools are clamped and driven by the chuck. - The conventional chuck type is basically a power shaft connected to the working machine by the body, the body is provided with a plurality of oblique guiding holes, and each of the oblique guiding holes is provided with a clamping jaw, and the outer surface of the missing claw The threaded section is combined with the heoping ring (four) of the outer ring of the body (four), and the pure ring can be controlled to move the jaws forward and backward in the body to clamp or release the cutter. The power shaft of the working machine rotates the body __ direction _, and rotates the body, Μ, drive production and the tool synchronously. The drive ring controls the key structure of the jaws to clamp or release the tool, and the drive ring tightens the jaws to allow the tool to work stably on the work surface. This means that if the drive ring is slightly loose, it will lose the ability to tighten the tool. However, when the tool works as a tool (4), it is opposite to the tool work in the opposite direction. The paste_force fine red force is increased to be obvious. 'When the tool work resistance is too large, the reverse force is greater than the drive ring. When tightening the direction of force of the jaws, the drive ring will be loosened, and the force of the jaws losing the tightening tool can only break through the working resistance, and it is necessary to interrupt the program processing of the cutter and the chuck = two = intentional inspection work Whether the surface is damaged by the looseness of the tool. And / by the above system, the display (four) sees the function of the material head is not cheap and loose. Post-cutting tool 5 1313208 [Summary of the Invention] In the addition procedure, it is not necessary for the above-mentioned tool to loosen, so it is necessary to increase the clamping force of the center head and to prevent loosening of the machining resistance. The tool-tool shank chuck of the _ detachment and high-central force proposed in the present case comprises: - a central shaft, a shaft portion of the shaft of the fortune shaft is provided with a braking portion; and a push rod is operatively coupled to the central shaft - Ends;
本體樞套於„亥中軸外，内部容設該推桿，週壁設若干央爪導槽； 干夾爪 對應设於上述夾爪導槽令，其-端與該推桿連接； 一前套，樞套於該本體外； 一後套’樞套於該中轴外，與《套接合，同時與該本體旋向定位； 該後套側壁相對該中軸之觸部設—可與之離合的制動塊；The main body is sleeved outside the shaft, and the push rod is arranged inside, and the peripheral wall is provided with a plurality of central claw guiding grooves; the dry clamping jaw is correspondingly arranged on the above-mentioned jaw guiding groove, and the end thereof is connected with the push rod; a sleeve is disposed outside the center shaft, and is engaged with the sleeve, and is simultaneously positioned with the body; the side wall of the back sleeve is disposed opposite to the contact portion of the center shaft. Brake block
旋轉蓋，套合於該後套外部，其_相_制動塊之所在位置設有 工制p及控制部；該旋轉蓋可依照外部鎖定⑽或非鎖定 (NL0CK)所不而被正、反地旋轉限定角度，使該第—控制部或第二控制部 被擇一地控制該制動塊，使該制動塊與該制動部結合或分開。 a本案上述之夾頭結構於夾制刀具的操作分為第-階段以及第二階段實 第之操作使該夾頭能以一定的力量夹緊刀具，第二階段之操 則使該夾頭能產生更進_ p W步的、更大的炎緊力夾制該刀具，並產生防止刀 具鬆脫之功能。 段之操作，確認織觀往刪财向赫，使該制動塊離開 :^制_。將刀具之蚊端從該前套的底部穿人至該本體中，手動 旋轉該前套’相_件之祕使鱗綠向勒具_，手概緊該前套， 6 1313208 S亥夾爪即能產生一定的力量夾制刀具。第一階段之操作，亦可以手動旋轉 該旋轉蓋而達到相同的效果。 第二階段之操作，確認該旋轉蓋往LOCK方向旋轉，使該制動塊與該制 動部結合，以手工具施以更大的力量轉動該旋轉蓋直至無法再旋動為止， 相關部件之動作使該等夾爪產生較第一階段更大的向中心方向夾緊力而更 夹緊刀具。 該旋轉蓋於LOCK狀態下具有特別的增益效應，其最重要者，係使該旋 轉蓋被鎖定在第二階段的鎖緊位置，保持該夾爪對該刀具的高夾緊力以及 鎖定在一種防鬆脫的狀態，除非將該旋轉蓋調轉至UNL〇CK，否則所述的高 夾緊力及防鬆脫狀態不會在刀具工作的過程中弱減或消失。 【實施方式】 如第一至四圖；本案之工具機刀桿夾頭，主要包含： -中軸1G，該中軸1〇之軸身外部設有—制動部u，該中_之_端為 刀把連接部13，另-端為本體連接部14，該中軸1〇之中央設一螺紋轴孔⑴ 所述的制動部11係為環繞該中軸丨〇的齒環J 2。 -推桿20，具有—職桿身2卜螺接於上述螺紋軸孔⑴該螺紋桿身 21底端設-夹爪連接部22，該夾爪連接部以設有若干連接單元，該連接 單元23在圖式中是係以特定型式的開口呈現。 -本體25 ’柩套於該中細外，内部容設該推桿2();該本體25壁面設 右干央爪導槽26。 右干夹爪30概呈一角塊狀結構，一—地對應設於該本體25的夾爪導 槽26中，並以其-端的連接_契合地與該推獅之連接單元23連接。 7 1313208 一前套35，樞套於該本體25外。 一後套40，枢套於該中軸10外，The rotating cover is sleeved on the outside of the rear sleeve, and the position of the _phase_brake block is provided with a working system p and a control part; the rotating cover can be positive or negative according to the external locking (10) or the non-locking (NL0CK) The ground is rotated to define an angle such that the first control unit or the second control unit selectively controls the brake block to engage or separate the brake block from the brake portion. a The above-mentioned chuck structure in the present case is divided into the first stage and the second stage operation, so that the chuck can clamp the tool with a certain force, and the second stage operation enables the chuck to A greater compression force that produces a further _p W step clamps the tool and creates a function that prevents the tool from loosening. The operation of the segment confirms that the weaving is going to delete the wealth, so that the brake block leaves: ^ system_. The mosquito end of the cutter is pierced from the bottom of the front sleeve into the body, and the front sleeve is manually rotated to make the scale green to the yoke, and the hand is tightly tightened to the front sleeve, 6 1313208 S That is, it can produce a certain force to clamp the tool. In the first stage of operation, the rotating cover can also be manually rotated to achieve the same effect. In the second stage of operation, it is confirmed that the rotating cover rotates in the LOCK direction, so that the brake block is combined with the braking portion, and the rotating tool is rotated by the hand tool until the rotation cover can no longer be rotated, and the related components are moved. These jaws produce a greater clamping force in the center direction than the first phase and more clamp the tool. The rotating cover has a special gain effect in the LOCK state, the most important of which is that the rotating cover is locked in the locked position of the second stage, maintaining the clamping force of the clamping jaw and locking it in a kind In the anti-loose state, unless the rotating cover is transferred to UNL〇CK, the high clamping force and anti-loose state will not be weakened or disappeared during the working of the tool. [Embodiment] As shown in the first to fourth figures; the tool machine shank chuck of the present invention mainly comprises: - a middle shaft 1G, the outer shaft of the middle shaft 1 设有 is provided with a braking portion u, and the _ end of the middle shaft is a knife handle The connecting portion 13 has a body connecting portion 14 at the other end, and a threaded shaft hole (1) is disposed at the center of the central shaft 1〇. The braking portion 11 is a ring gear J 2 surrounding the central shaft. a push rod 20 having a shaft 2 screwed to the threaded shaft hole (1). The bottom end of the threaded shaft 21 is provided with a jaw connecting portion 22, the jaw connecting portion is provided with a plurality of connecting units, the connecting unit 23 is shown in the drawings as a particular type of opening. The body 25' is sleeved in the middle and the outer portion, and the push rod 2 () is accommodated inside; the wall portion of the body 25 is provided with a right trunk claw guide groove 26. The right-hand gripper 30 has a corner block-like structure, and is disposed in the jaw guide groove 26 of the body 25, and is connected to the lion-connecting unit 23 by its end-end connection. 7 1313208 A front sleeve 35 pivoted outside the body 25. a rear sleeve 40 pivoted outside the center shaft 10,
複數齒所構成；該元件槽中另設一 靣裱的齒合部451，該齒合部451係由 一彈性元件46，其彈力作用於該制動塊 之相異該齒δ #451之端部，據以使上述的齒合部451可齒合於該齒環 12。該後套40外壁於-直麵端之位置各設__直切壁祕以及—被彈菁48 頂持的圓珠481。 奴轉蓋50，套合於該後套4〇外，其内壁相對該二直切壁面各設一 與之相切_合塊5卜以及供_珠481切換及彈卡的第-、第二珠槽52、 53，叫配合第六圖，該旋轉蓋5〇内壁相對該制動塊45之所在位置設一第— 控制部54及一第二控制部55 ;該第一控制部54係設於該旋轉蓋5〇内壁呈斜 面狀的第一切邊541 ;該第二控制部55係設於該旋轉蓋5〇内壁呈斜面狀的第 一切邊551 ’該第一、第二切邊541、551所代表的斜面係可延伸而相交。在 本案中，該第一切邊541及第二切邊551相連而構成一角狀邊槽56。復參考 第—圖’該旋轉蓋50之外壁設有LOCK與UNLOCK的旋轉方向指示，以及一工 具定位孔57。 一刀把60，樞套固定於該中轴1〇之刀把連接部13，該刀把60與工具機 之傳動轴接合。 8 1313208 在此要特別對於該旋轉蓋50往LOCK方向旋轉或往UNLOCK方向旋轉時相 關部件之相對位置關係做一說明。 如第三、四、五、六圖，該旋轉蓋5〇往L〇CK方向旋轉，其以第一珠槽 52供該後套40的圓珠481彈卡其中，該切合塊51滑切至該直切壁面47的端 部’使該旋轉蓋50與該後套40構成旋向限位關係，此時該旋轉蓋5〇是以其 第一切邊541相對該制動塊45之所在位置，此一相對位置的特徵是該角狀邊 槽56相對該制動塊45不產生向軸心方向的壓制作用，因此彈性元件牝得以 其彈力推抵該制動塊45的端部，進而使其齒合部451卡進該中軸10的齒環12 中。 如第七、八圖’該旋轉蓋训往狐⑽方向旋轉，其以第二珠槽犯供該 後套40的圓珠481彈卡其中，該切合塊51滑切至該直切壁面47的另一端部， 使該旋轉蓋5〇與該後套4〇構成旋向限位關係，此時該旋轉蓋讪是以其第二 切邊551相職獅塊45之所麵置，此—相對位置的舰是該肖狀邊槽56 對該制動塊45產生-㈣d向賴制作用，此―制作紐該制動塊45 的端部壓_雜元件46，進而使無合部451與該巾__環12怒離。 上述夾頊夾制刀具的操作分為第一階段以及第二階段，第一階段之操 作使該夾頭能以—定的力量夾緊刀具，第二階段之操作則使該央頭能產生 更進-步的、更大的爽緊力’達到防止刀具鬆脫之目的。 第一P皆段之，確認職驢5〇測體方向_，依據前段所述 第、圖所示，此一動作將使該制動塊45的齒合部451與該中軸1〇的齒 衣1¾離。將刀具之固定端從該前套35的底部穿入至該本體中，手動旋 轉4則套35 ’該後套4〇、本體25、夹爪3Q、中軸則步旋轉，若干夾爪3〇 9 1313208 向下向中心方向推進’至手動旋緊該前套4Q，該爽爪斯能產生一定的力 #制刀n—階段之操作，亦可財峽轉該旋轉獅而達到相同的 效果。從第一階段之操作’熟悉此項技術者可推知，反向的旋轉該前套35 或者疋雜髓50 ’上述各部件產生反向動作，因此夾爪瓣鬆開刀具。 第-階段之操作’確認該旋轉蓋5〇往膽方向旋轉，依據前段所述及 莖二、 一、四、五、六圖所示，此一動作將使該制動塊45的齒合部451卡進該 φ 巾軸⑺的細12巾。財卫具定位在該卫具定減57巾，以便施以大的力 里轉動s織轉蓋50直至無法再旋動為止，此—過程中因該制動塊45隨著旋 #蓋5祕動而使其歯合部451與該齒環12發;t棘齒切;^的聲響。在第二階段 之操作中，该旋轉蓋5〇將使該後套4〇、前套35、本體25發生更進一步的轉 動，因而使若干夾爪3〇產生較第一階段更大的向中心方向夾緊力而更夾緊 刀具。啟動工具機傳動軸，該刀把6〇帶動該中軸1〇軸轉，因該中軸1〇之齒 %12與§亥制動塊45有卡制關係，因此該制動塊45隨該中軸1〇移動，進而帶 動该後套40、旋轉蓋50、前套35、本體25、夾爪30、推桿20同步轉動，以 _ 被夾制的刀具進行工作面之加工。而制動塊45的齒合部451之複數棘齒，可 平均的負擔一部份的齒合作用力，共同之作用即增加該制動塊451的齒合力 量，可避免崩齒之情形方式。 值得特別說明的是該制動塊45之齒合部451與該中軸1 〇齒環12之卡制 關係（亦即該旋轉蓋50於LOCK狀態）所產生的增益效應。增益效應之一係使 該旋轉蓋50被鎖定在第二階段的鎖緊位置，保持該夾爪3〇對該刀具的高爽 緊力以及鎖定在一種防鬆脫的狀態，除非將該旋轉蓋5〇調轉至UNLOCK，否 則所述的高夾緊力及防鬆脫狀態不會在刀具工作的過程中弱減或消失。增 1313208 益效應之二係該夾頭所具有的高夾緊力以及防鬆脫狀態使刀具於工作時的 穩定性獲得顯著提昇。增益效應之三是域頭所具有的高絲力以及防鬆 脫狀態使刀具於i作巾遭受較大的王作雖力時，紐揮扭力突破該工作 阻力。 雖然本案是以一個最佳實施例做說明，但精於此技藝者能在不脫離本 案精神與鱗下做各種不同形式的改變。社所舉實補侧以說明本案 而已，非用以限制本案之範圍。舉凡不違本案精神所從事的種種修改或變 化’俱屬本案申請專利範圍。 【圖式簡單說明】 第一圖為本案夾頭立體分解圖。 第二圖為本案夹頭組合外觀圖。 第-圖為第—圖中3_3組合剖面，並表示夾頭於順狀態。 第四圖為第_圖中4_4組合剖面，並表示細於L〇CK狀態 第五圖為第三圖中5-5橫斷面圖。 第六圖為第三目中6-6橫斷面圖。 第七圖為^五目之橫斷面表示旋做頭謂LGCK狀態。 第圖為以第六圖之橫斷面表示旋轉夾頭至UNLOCK狀態。 【主要元件符號說明】 10-中軸 43-元件槽 11- 制動部 12- 齒環 13- 刀把連接部 44-插梢 45-制動塊 451-齒合部 1313208 14-本體連接部 46-彈性元件 15-螺紋轴孔 47-直切壁面 20-推桿 48-彈簧 21-螺紋桿身 481_圓珠 22-夾爪連接部 50-旋轉蓋 23-連接單元 51-切合塊 25-本體 52-第一珠槽 26-夾爪導槽 53-第二珠槽 2 7-插鎖 54-第一控制部 30-夾爪 541-第一切邊 31-連接部 55-第二控制部 35-前套 551-第二切邊 37-内螺紋 56-角狀邊槽 40-後套 57-工具定位孔 41 -外螺紋 60-刀把 12A plurality of teeth are formed in the element slot; a toothed portion 451 is disposed in the element slot, and the tooth portion 451 is composed of an elastic member 46, and an elastic force acts on the end of the brake block which is different from the tooth δ #451 Therefore, the above-described toothed portion 451 can be engaged with the ring gear 12. The outer wall of the rear sleeve 40 is provided with a __ straight wall and a ball 481 held by the elastic phthalocyanine 48 at the position of the straight face. The slave cover 50 is sleeved on the rear cover 4, and the inner wall is provided with a tangent to the two straight cut walls _ a joint 5 b and a _ beads 481 switch and a second and second spring card The bead slots 52, 53, are referred to as a sixth figure, and the inner wall of the rotating cover 5 is provided with a first control portion 54 and a second control portion 55 with respect to the position of the brake block 45; the first control portion 54 is The first cover portion 541 is formed in a sloped shape on the inner surface of the rotating cover 5; the second control portion 55 is disposed on the first trimming edge 551' of the inclined inner surface of the rotating cover 5'. The slanted surface represented by 551 can be extended and intersected. In the present case, the first trimming edge 541 and the second trimming edge 551 are connected to each other to form an angular side groove 56. Referring to Fig. </ RTI> The outer wall of the rotary cover 50 is provided with a rotational direction indication of LOCK and UNLOCK, and a tool positioning hole 57. A cutter 60 is pivotally fastened to the cutter handle 13 of the center shaft 1 , and the cutter handle 60 is engaged with the drive shaft of the machine tool. 8 1313208 Here, a description will be given of the relative positional relationship of the related components when the rotary cover 50 is rotated in the LOCK direction or rotated in the UNLOCK direction. As shown in the third, fourth, fifth, and sixth figures, the rotating cover 5 is rotated in the direction of L〇CK, and the ball 481 of the back cover 40 is snapped by the first bead groove 52, and the cutting block 51 is slid to The end portion of the straight cut wall surface 47 forms a rotational limit relationship between the rotating cover 50 and the rear sleeve 40. At this time, the rotating cover 5 is located at a position where the first cutting edge 541 is opposite to the brake block 45. The feature of the relative position is that the angular side groove 56 does not have a pressing action in the axial direction with respect to the brake block 45, so that the elastic member 牝 is elastically urged against the end of the brake block 45, thereby making its teeth The hinge 451 is snapped into the ring gear 12 of the center shaft 10. As shown in the seventh and eighth figures, the rotating cover is rotated in the direction of the fox (10), and the ball 481 of the rear cover 40 is smashed by the second bead groove, and the cutting block 51 is slid to the straight cut wall surface 47. The other end portion is configured to form a rotation limit relationship between the rotating cover 5〇 and the rear sleeve 4〇, and the rotating cover is disposed on the opposite side of the lion block 45 by the second cutting edge 551. The position of the ship is that the slanted side groove 56 produces a - (four) d traverse for the brake block 45, and the "end" of the brake block 45 is made to the end portion of the brake element 45, thereby making the detachment portion 451 and the towel _ _ Ring 12 is angry. The operation of the above-mentioned clamping and clamping tool is divided into a first stage and a second stage. The operation of the first stage enables the chuck to clamp the tool with a constant force, and the operation of the second stage enables the head to generate more The step-by-step, greater tightening force 'reaches the purpose of preventing the tool from loosening. The first P is segmented, and the position of the measuring body is confirmed. According to the figure and figure shown in the preceding paragraph, this action will cause the toothed portion 451 of the brake block 45 and the toothed garment of the central shaft 1〇. from. The fixed end of the cutter is inserted into the body from the bottom of the front sleeve 35, and the sleeve is manually rotated 4'. The rear sleeve 4〇, the body 25, the jaw 3Q, the middle shaft rotates stepwise, and the jaws 3〇9 1313208 Advancing downwards to the center to manually tighten the front cover 4Q, the cool claws can generate a certain force #knife n-stage operation, can also turn the lion to achieve the same effect. From the first stage of operation, it will be inferred by those skilled in the art that the reverse rotation of the front sleeve 35 or the boring pulp 50' causes the reverse action, so that the jaws release the cutter. The operation of the first stage confirms that the rotary cover 5 is rotated in the direction of the bile. According to the preceding paragraph and the two, one, four, five and six diagrams of the stem, this action will cause the toothed portion 451 of the brake block 45. The thin 12 towel that is snapped into the φ towel shaft (7). The financial guard is positioned to reduce the towel in the guard so that it can be rotated by a large force to rotate the cover 50 until it can no longer be rotated. In this process, the brake block 45 is secreted with the cover #5. And the kneading portion 451 and the ring gear 12; t ratchet cut; ^ sound. In the second stage of operation, the rotating cover 5 will cause the rear sleeve 4, the front sleeve 35, and the body 25 to rotate further, thereby causing the plurality of jaws 3 to produce a larger center toward the center than the first stage. Clamp the force in the direction and clamp the tool more. Starting the power tool drive shaft, the tool handles the middle shaft 1〇 shaft rotation, because the tooth shaft %12 of the center shaft 1 has a locking relationship with the brake block 45, so the brake block 45 moves with the center shaft 1〇, Further, the rear cover 40, the rotating cover 50, the front cover 35, the main body 25, the clamping jaws 30, and the push rod 20 are synchronously rotated, and the working surface is processed by the _ clamped tool. On the other hand, the plurality of ratchet teeth of the toothed portion 451 of the brake block 45 can evenly share a part of the tooth cooperation force, and the common function is to increase the amount of tooth joint force of the brake block 451, thereby avoiding the situation of the tooth collapse. Of particular note is the gain effect produced by the engagement of the toothed portion 451 of the brake block 45 with the center shaft 1 ring gear 12 (i.e., the rotating cover 50 in the LOCK state). One of the gain effects is that the rotary cover 50 is locked in the locked position of the second stage, maintaining the high clamping force of the jaw 3 against the cutter and locking in a detachable state unless the rotating cover is 5〇 Transfer to UNLOCK, otherwise the high clamping force and anti-loose state will not be weakened or disappeared during the working process of the tool. Increased 1313208 The second effect of the effect is that the high clamping force and anti-loose state of the chuck result in a significant increase in the stability of the tool during operation. The third gain effect is that the high-strength force and the anti-loose state of the domain head make the tool break the work resistance when the tool is subjected to a large masterpiece. Although the present case is illustrated by a preferred embodiment, those skilled in the art can make various forms of changes without departing from the spirit and scale of the present invention. The Society has supplemented the side to explain the case and it is not intended to limit the scope of the case. Any modification or change that is not in violation of the spirit of the case is the scope of patent application in this case. [Simple description of the diagram] The first figure is a three-dimensional exploded view of the chuck. The second picture shows the appearance of the collet combination. The first picture is the 3_3 combined section in the first figure, and the chuck is in the forward state. The fourth figure is the 4_4 combined section in the figure _, and shows the finer than the L〇CK state. The fifth figure is the 5-5 cross-sectional view in the third figure. The sixth picture is a 6-6 cross-sectional view of the third item. The seventh picture shows the cross section of the ^5 mesh indicating that the head is called the LGCK state. The figure shows the rotation of the collet to the UNLOCK state in the cross section of the sixth figure. [Description of Main Components] 10-Center Shaft 43-Component Slot 11- Brake 12- Tooth Ring 13- Knife Holder Connection 44-Tap 45-Brake Block 451-Toothed Portion 1313208 14- Body Connection Portion 46-Elastic Element 15 - threaded shaft hole 47 - straight cut wall surface 20 - push rod 48 - spring 21 - threaded shaft 481 - ball 22 - jaw connecting portion 50 - rotating cover 23 - connecting unit 51 - cutting piece 25 - body 52 - first Bead groove 26 - gripper guide groove 53 - second bead groove 2 7 - mortise lock 54 - first control portion 30 - gripper 541 - first trimming 31 - connecting portion 55 - second control portion 35 - front sleeve 551 -Second trimming 37 - internal thread 56 - angular side slot 40 - rear sleeve 57 - tool positioning hole 41 - external thread 60 - knife handle 12