200811381 九、發明說明： 【發明所屬之技術領域】 本發明係提供-種滾珠螺桿之㈣結構及I m ’其用途是使無法於螺帽兩端設避 、题流70件 較小之螺帽，在不損壞牙峰下:S 其導程角同時 係將避流元件設為具一徑向塊體及二暢甘迴流；其 具一自徑向朝軸向轉彎、之 A —，、内部係 付弓炙艰机道，兩廻流元件 螺帽之軸向兩端，該螺帽對 ，、肷； 設一貫通至螺帽内部之徑向梓之徑向塊體係開 一未貫穿至螺帽内部之轴向凹槽槽，塊=設 =於螺帽壁料之滾道，滾珠乃可自螺帽之_槽: 其元件之题流道中，再依序進入滾道及另一喊 ί敫之匕：道中’再進入螺帽另端之螺旋样中，而爐成 :整之鳴徑’而藉题流元件轴向塊雜及伊軸向而:艘成承一 之凹槽之搭配設計，不僅题流元件保有順暢的题流道， ^不會損及螺帽之牙峰，而確保滾珠可順暢的滾動及迴 【先前技術】 清參閱圖^一及圖二A、R - . ，因其特殊用途之兩Ί甘 滾珠螺桿之螺帽1 ο tf*1 η \而要，八一側端面須設一螺紋部1 1， 之兩側 面而；供滾珠迴流之結構乃無法設於螺帽1〇 2 :須於螺帽10近兩側端之外環面各開設- 曰12 1 3，供各置入一廻流元件丄56，該各 T槽ί ί 3之徑向兩側，乃各形成-平面承置部1 2 、2、1 3 1、，1 3 2，兩切槽1 2、工3間並設 5 200811381 一隱藏於螺帽10壁厚中之滾道14,而該滚道1 4並與 兩=槽1 2、1 3貫通，該各廻流元件1 5、1 6内部係 各汉自技向朝軸向轉彎之廻流道1 5 1、1 6 1，該 兩迴fL 70件1 5、1 6之廻流道徑向端係與滚道1 4相 通’該兩廻流元件1 5、1 6嵌置於切槽1 2、1 3時， ί方^，王徑向對置，該兩迴流元件1 5、1 6之迴流道 徑1端係各對應於螺帽1 0之螺旋槽1 7，使滾珠可循著 螺^槽1 7滚動至題流元件1 5處時，自迴流元件1 5之 廻流道1 5 1徑向端進入，再廻轉至軸向端，而進入滾道 1 4中，再進入另一廻流元件1 6之廻流道1 θ 1軸向端 迴轉至徑向端，最後與螺帽1 0另端之對應螺旋槽1 7銜，，而槽成一完整之廻流路徑，該廻流元件i 5或工 6為能使其廻流道1 5 1或1 6 1，有較微緩之迴轉彎道 ，其寬度D乃須設為較寬，請配合參閱圖二a、b所示， 圖一 A係一種導程角較大之螺帽1 〇，圖二b係一種導程 角較小之螺帽1 〇，圖一所示之廻流元件1 5或1 6，應 用於圖二A之螺帽時，因其螺旋槽i 7之間距較大，螺g 槽1 7兩侧牙峰1 8間之寬度d係大於廻流元件1 5或1 6之寬度D，故供嵌置廻流元件1 5或1 6之切槽1 2或 • 1 3，並不會將整個對應迴流元件1 5或1 6之螺旋槽兩 側牙峰1 8完全剖除，使滾珠可正常的滾動，而迴流元件 1 5或1 6 ,應用於圖二B之螺帽1 〇時，因其螺旋槽工 7之間距較小，螺旋槽1 7兩側牙峰1 8間之寬度d係小 於廻流元件1 5或1 6之寬度D，廻流元件1 5或i 6嵌 置於切槽1 2或1 3中時，切槽1 2或1 3開設時，會將 對應廻流元件1 5或1 6之螺旋槽1 7兩側之牙峰i ^完 全剖除，廻流元件1 5或1 6裝設上去時，會阻礙滾珠= 正常滾動。 【發明内容】 6 200811381 - 基於上述習知滾珠螺桿之問題，本發明人乃本著研發 目關產—年之經驗’潛心研究，不斷的設計改良，並製 作樣品試驗，經反覆的夠試，再加以改進，終有確能達成 以下發明目的之本發明誕生。 上之’係藉將設於滾珠螺桿之螺帽 端轉彎至不可貫d回t流元件内部係具一自可貫通 •與螺帽壁厚中之一滾道相=道，猎兩迴流元件之廻流道係 j ’藉該各迴流元；係為i部ί以二”元 須開設較小之寬：上供廻流元件嵌置之切槽，僅 全剖除，俾對^此該迴流元件之牙峰，完 角同時較小之螺帽，仍可令宁件及其導程 為读η^衰珠常、順暢的廻流。 元件i包括向塊體及改良特徵係在於：避流 凸出之軸向塊體，該廻流元件端=-軸向 觸；該兩題流元件係;i於^係呈斜面接 該螺帽對岸各稱治分杜夕γ ' 軸向兩^之外環面， 一未貫穿至螺帽内部螺旋槽之凹槽，該兩二播_係汉 螺帽之壁厚中係設一貫通兩凹槽係呈相對， 题流道係與該滾道相通，該各題流ϋ 题流元件之 向對置。 合夂/;,L7G件之徑向塊體係呈徑 200811381 【實施方式】 為使f審查委員及習於本項技#之人士，對本發明有 更-步之暸解，兹舉-較佳實施例，詳細說明如后：（惟， 本實施例僅為利於說明，本發明日後之實施，並不以此為200811381 IX. Description of the invention: [Technical field of the invention] The present invention provides a structure of a ball screw (IV) and an I m 'the utility model is to prevent the nut from being able to be shielded at both ends of the nut, and the 70-piece smaller nut Under the condition that the tooth peak is not damaged: S, the lead angle of the current is set to have a radial block and a second return; the one has a self-radial axial turn, A-, and interior It is a snail that is difficult to pass through, and the two ends of the two turbulent component nuts are axially opposite ends of the nut. The nut is connected to the inner part of the nut and the radial block system is not penetrated to the snail. The axial groove groove inside the cap, block = set = in the raceway of the nut wall material, the ball is self-nut-shaped groove: in the flow path of its component, then enter the raceway in sequence and another shout敫之匕: In the middle of the road, 'return into the spiral of the other end of the nut, and the furnace is: the whole sounding path' and the axial flow block and the axial direction of the flow element are used: Design, not only the flow element retains a smooth flow path, ^ does not damage the peak of the nut, but ensures that the ball can smoothly roll and return [previous technology] Refer to Fig. 1 and Fig. 2A, R - . , for the special purpose of the two ball screw nut 1 ο tf * 1 η \, the eight side end must be provided with a threaded part 1 1, two The structure for the ball reflow cannot be provided on the nut 1〇2: the toroidal surface of each of the two sides of the nut 10 is to be opened - 曰12 1 3 for each of the choke elements 丄56, The radial sides of the respective T-slots ί ί 3 are formed into plane-planar parts 1 2 , 2 , 1 3 1 , 1 3 2, two slots 1 and 2 are arranged 5 200811381 a raceway 14 in the wall thickness of the nut 10, and the raceway 14 is connected to the two = slots 1, 2, 13, and the internal components of the choke elements 15 and 16 are axially oriented. The turning flow passage 1 5 1 , 1 6 1, the two return fL 70 pieces 1 5, 16 6 the radial end of the flow channel is in communication with the raceway 14 4 'the two choke elements 1 5, 16 embedded When placed in the slots 1 2, 1 3, ί square ^, the king is diametrically opposed, the return flow path 1 end of the two reflow elements 15 and 16 respectively correspond to the spiral groove 17 of the nut 10 When the ball can be rolled along the screw slot 17 to the flow element 15 5, the radial end of the runner 1 1 1 of the reflow element 15 enters. Then turn to the axial end, and enter the raceway 14 and then enter the other choke element 16 of the choke 1 θ 1 axial end to the radial end, and finally with the nut 10 Corresponding to the spiral groove, the groove is formed into a complete turbulent flow path, and the choke element i 5 or the work 6 is such that the turbulent flow path 1 5 1 or 161 has a slight turning curve. The width D must be set to be wider. Please refer to Figure 2a, b. Figure 1A is a nut with a large lead angle. Figure 2b is a nut with a small lead angle. 1 〇, when the turbulence element 1 5 or 16 shown in Figure 1 is applied to the nut of Figure 2A, because of the large distance between the spiral grooves i 7 , the snail g groove 1 7 between the two peaks The width d is greater than the width D of the choke element 15 or 16 so that the slot 1 2 or • 1 3 of the choke element 15 or 16 is embedded, and the entire corresponding reflow element 15 or The tooth peaks on both sides of the spiral groove of 1 6 are completely cut off, so that the balls can roll normally, and the reflow element 15 or 16 is applied to the nut 1 of Fig. 2B, because of its spiral groove 7 The spacing is small, and the width d of the tooth peaks on both sides of the spiral groove 17 is less than the turbulence When the width of the element 1 5 or 16 is D, when the choke element 15 or i 6 is embedded in the slot 1 2 or 13 , when the slot 1 2 or 13 is opened, the corresponding choke element 15 or The tooth peaks i ^ on both sides of the spiral groove 1 of 1 6 are completely cut off, and when the choke element 15 or 16 is installed, the ball is prevented from being normally rolled. SUMMARY OF THE INVENTION 6 200811381 - Based on the above-mentioned problems of the conventional ball screw, the inventors of the present invention have been researching and researching, researching and improving, and making sample tests, which have been tried repeatedly, in accordance with the experience of research and development. Further improvements are made, and the invention of the following invention is finally achieved. The above is based on the fact that the nut end of the ball screw is turned to the incompetent d-return t-flow element. The internal tie is self-contained. One of the thicknesses of the nut wall is the track, and the two reflow elements are hunt. The turbulent channel system j' borrows the respective reflow elements; the system is i-part ί with two" yuan to open a smaller width: the upper turbulence element is embedded in the slot, only the full cut, 俾 ^ The tooth peak of the component and the smaller nut at the same time can still make the grading and smoothing of the nitrite and the lead traverse. The component i includes the block and the improved feature is: the flow avoidance a protruding axial block, the choke element end =- axial contact; the two problem flow element system; i is in the oblique line and the opposite side of the nut is called the rule of Du Xi γ 'axial two ^ The outer annular surface, a groove that does not penetrate into the spiral groove of the inner nut of the nut, is provided with a through-and two-groove system in the wall thickness of the two two-wheeled Chinese nut, and the flow channel is connected to the raceway The headings of the problem flow elements are opposite to each other. 夂/;, the radial block system of the L7G piece is in the diameter of 200811381 [Embodiment] For the purpose of making the review committee and the person in this project, It is to be understood that the following is a detailed description of the preferred embodiment.
p艮，凡以本發明之技術特徵所為之改良實施，皆受本發明 所拘束）。 X 請參閱圖三、四、七所示，其係—種須在滾珠螺桿之 •螺帽2 0-侧端，延伸設一螺紋部2 3，其軸向外環面兩 端係各剖設-切槽2 1、2 2，該兩切槽2 1、2 2係可 貫通至螺帽内部之螺旋槽2 7，各切槽2工、2 2之形狀 係與螺旋槽2 7對應位置之螺旋曲度相同，各切槽2 1、 2 2剖設時，係僅將對應切槽2 142 2之螺旋槽2 了兩 側之牙峰2 8局部剖除’各切槽2丄、2 2則對正螺旋槽 2 7，該切槽2 1、2 2之-端係呈相對，於其鄰側係各 •設一凹槽211、221，該各凹槽211、221底部 係具承置面213、223，該兩凹槽211、221 間之螺帽2 0壁厚中，係設一與兩凹槽2丄丄、2 2丄貫 通之滾道2 4，另，該各切槽2 1、2 2位於其鄰側凹槽 2 1 1、2 2 1之另端侧壁，係各設有一螺孔2 2 4 (切 槽2 1之螺孔，因角度關係，未視及）；該兩切槽2工、2 2係可各置人—迴流元件2 5、26，該各迴流元件25 、2 6係各具一徑向塊體2 5 5、2 6 5，各徑向塊體2 8 200811381 5 5、2 6 5之一端係形成一軸向凸出之軸向塊體2 5 4、2 6 4 ’該軸向塊體2 5 4、2 6 4之厚度係小於其 徑向塊體2 5 5、2 6 5，使該軸向塊體2 5 4、2 6 4 之下方形成一空間，該各迴流元件2 5、2 6内部係各設 有一廻流道2 5 6、2 6 6，該各廻流道2 5 Θ、2 6 Θ 係具一開口 2 6 7 (兩廻流元件2 5、2 6係相同，僅以 廻流元件2 6例示），該開口 2 6 7係設於徑向塊體2 5 ⑩ 5、2 6 5之底端（請搭配圖六所示，）避流道2 5 6、 2 6 6再自開口 2 6 7微緩向上及轉腎，並延伸至軸向塊 體2 5 4、2 6 4，該軸向塊體2 5 4、2 6 4之側面， 並設一通孔2 6 3與廻流道2 5 6、2 6 6相通，該各迴 流元件2 5、2 6之徑向塊體2 5 5、2 6 5之上端面係 各設有一斜沉孔2 5 1、2 6 1，該斜沉孔2 5 1、2 6 .1係連通至设於徑向塊體2 5 5、2 6 5徑向側面之穿孔 _ 252、262，於兩廻流元件25、26嵌置於其對應 切槽2 1、2 2時，可以一螺絲2 1 5、2 2 5自該沉孔 251、261穿入，自穿孔252、26 2穿出，而螺 鎖固定於螺孔2 2 4中，該各迴流元件2 5、2 6之軸向 塊體2 5 4、2 6 4則憑靠於承置面2 1 3、2 2 3上， 同時，該各廻流元件2 5、2 6之迴流道2 5 6、2 6 6 之開口 2 6 7，則對正於螺帽2 0之螺旋槽2 7，各迴流 9 200811381 道2 5 6、2 6 6之通孔2 θ 3則對正滾道2 4，請參閱 圖七所示，螺帽2 0中之滾珠，乃可自右側循著螺旋槽2 7朝左滾動位移’再自迴流元件2 5之迴流道2 5 6之開 口進入廻流道2 5 6中，再進入滾道2 4中，再進入另一 迴流元件2 6之迴流道2 6 6中，最後自迴流道2 6 6之 開口 2 6 7出來而進入與廻流道2 6 6銜接之螺旋槽2 7 ’而構成一供滾珠迴流之路徑。 馨 請再參閱圖五、六所示，該廻流元件2 5、2 Θ係可 由兩上、下塊體2 6 8、2 Θ 9對合所構成（僅以廻流元 件2 6例示）’該避流元件2 6係以題流道2 6 6 —半之位 置為分界，將廻流元件2 6剖成上、下兩塊體2 6 8、2 69，上塊體268之底端面係設有數凸柱268 1、2 6 8 2，下塊體2 6 9之上端面係設有與凸柱2 6 8 1、 2 6 8 2相對之數凹槽2 6 9 1、2 6 9 2，藉凸柱及凹 鲁槽之尺寸相近，該各凸柱2 6 8 i、2 6 8 2係可緊迫插 置於凹槽2691、26 9 2中，使上、下塊體268、 269固定成一體； 請再配合參閱圖三、七所示，本發明之兩廻流元件2 5 2 6 (虛線者）肷置於螺帽2 〇上時，各迴流元件2 5、2 6之徑向塊體255、265之寬度〇係小於螺旋 槽2 7及其兩側牙峰2 8之總寬度d，供徑向塊體2 5 200811381 5、265後置之切槽（圖未不）2 1、22之寬度，亦 僅須設為相近於徑向塊體2 5 5、2 6 5之寬度D，即， 其僅須將螺旋槽2 7兩側之牙峰2 8作局部剖除，即可供 其對應之兩徑向塊體2 5 5、2 6 5嵌入，使該兩牙峰2 8仍保有其導引滾珠之功能，各廻流元件2 5、2 6之題 流道2 5 6、2 6 6之轉彎路徑，則可藉設計於軸向塊體 2 5 4、2 6 4中，使該各廻流道2 5 6、2 6 6之廻轉 鲁 舄求，付到解決，凊再參閱圖八所示，對於一此牙峰2 8 厚度較小之螺帽2 0，各迴流元件2 5、2 6之徑向塊體 2 5 5、2 6 5肷入於螺旋槽2 7兩側之牙峰2 8中時， 各徑向塊體2 5 5、2 6 5係與其相鄰之兩牙峰2 8平行 ’使剖除牙峰2 8時，不易破損；藉本發明之結構設計， 使無法於螺帽兩端設避流元件及其導程角同日寺較小之螺 帽’獲得了-個解決的方法，同時，本發明的結構設計， 並不限制於低導程角之螺帽，各種不同導程角之螺帽，皆 可適用。 綜上所述，本發明實深具實用性及進步性，且經本申 請人遍查國内外文獻，並無發現相同或近似者，本發明誠 符合專利法上有關發明之較，爰依法提出中請。 200811381 【圖式簡單說明】 圖一係習知螺帽與迴流元件之立體分解圖。 圖二A係習知廻流元件應用於導程角較大之螺帽之杳，、、 圖二B係習知廻流元件應用於導程角較小之螺 圖。 ’、自之剖面示意 圖三係本發明螺螺帽與迴流元件之立體分解圖。 圖四係本發明之廻流元件裝設於螺帽之立體分解 圖五係本發明之廻流元件之立體分解圖。 ° 圖六係本發明之廻流元件之立體組裝圖。 圖七係本發明避流元件應用於導程角較小之螺 圖。 ”1目之剖面示意 圖八係本發明廻流元件之徑向塊體設為與牙峰平行a 一、 意圖。 之面’ 【主要元件符號說明】 1 0螺帽 1 1螺紋部 1 2切槽 121承置部 12 2承置部 1 2 3穿孔 13切槽 131承置部 13 2承置部 1 3 3穿孔 1 4滾道 15迴流元件 151迴流道 15 2直線部 1 5 3彎部 16廻流元件 161避流道 16 2直線部 1 6 3彎部 1 7螺旋槽 1 8牙峰 2 0螺帽 2 1切槽 2 1 1凹槽 2 1 2穿孔 213承置面 2 1 5螺絲 2 2切槽 2 2 1凹槽 2 2 2穿孔 2 2 3承置面 2 2 5螺絲 2 3螺紋部 2 4滾道 2 5迴流元件 2 5 1沉孔 2 5 2穿孔 2 5 3 出 口 2 5 4軸向塊體 2 5 5徑向塊體 2 5 6避流道 2 6題流元件 12 200811381 2 61沉孔 2 6 3通孔 2 6 5徑向塊體 2 6 6迴流道 268上塊體 2681凸柱 269下塊體 2691凹槽 2 7螺旋槽 2 8牙峰 2 6 4軸向塊體 2 6 7入口 2 6 8 2凸柱 2 6 9 2凹槽That is, the improved implementation of the technical features of the present invention is governed by the present invention. X Please refer to Figure 3, Figure 4, and Figure 7. The system must be placed at the side end of the ball screw 20--, with a threaded portion 2 3 extending at both ends of the axial outer ring surface. - grooving 2 1 , 2 2 , the two slots 2 1 , 2 2 can penetrate into the spiral groove 2 7 inside the nut, the shape of each slot 2 , the shape of 2 2 and the position of the spiral groove 27 When the spiral curvature is the same, when the slits 2 1 and 2 2 are cut, only the tooth peaks 28 on both sides of the spiral groove 2 corresponding to the slit 2 142 2 are partially cut off. 'The respective slits 2丄, 2 2 Then, the right spiral groove 2 7 is opposite to the end of the slit 2 1 , 2 2 , and a groove 211 , 221 is disposed on the adjacent side of the groove, and the bottoms of the grooves 211 and 221 are mounted. 213, 223, in the wall thickness of the nut 20 between the two grooves 211, 221, a raceway 24 is formed which is connected to the two grooves 2丄丄, 2 2丄, and the slits 2 are further 1, 2 2 is located at the other side wall of the adjacent side groove 2 1 1 , 2 2 1 , and each is provided with a screw hole 2 2 4 (the screw hole of the slot 2 1 , which is not considered due to the angle relationship); The two slots 2 and 2 2 can be placed each other - the reflow elements 25, 26, and each of the reflow elements 25, 26 has a diameter Block 2 5 5, 2 6 5, each radial block 2 8 200811381 5 5, 2 6 5 one end forms an axially protruding axial block 2 5 4, 2 6 4 'The axial block The thickness of the body 2 5 4, 2 6 4 is smaller than the radial block 2 5 5, 2 6 5, so that a space is formed below the axial block 2 5 4, 2 6 4 , and the reflow elements 2 5 2, 6 internal system is provided with a flow channel 2 5 6 , 2 6 6 , each of the flow channels 2 5 Θ, 2 6 Θ a pair of openings 2 6 7 (two choke elements 2 5, 26 6 are the same , only the turbulence element 26 is illustrated), the opening 276 is disposed at the bottom end of the radial block 2 5 10 5 , 2 6 5 (please match the figure 6), avoiding the flow path 2 5 6 , 2 6 6 and then open 2 6 7 slightly upward and kidney, and extend to the axial block 2 5 4, 2 6 4, the side of the axial block 2 5 4, 2 6 4, and a through hole 2 6 3 is in communication with the chokes 2 5 6 and 2 6 6 , and the end faces of the radial blocks 2 5 5 and 2 6 5 of the reflow elements 2 5 and 26 are each provided with a slanting hole 2 5 1 , 2 6 1, the inclined counterbore 2 5 1 , 2 6 . 1 is connected to the perforations _ 252, 262 provided on the radial sides of the radial block 2 5 5, 2 6 5 , in the two choke elements 25, 26 embedded When the corresponding slots 2 1 and 2 2 are corresponding to each other, a screw 2 1 5, 2 2 5 can be inserted through the counterbore 251, 261, and the through holes 252 and 26 2 are pierced, and the screw lock is fixed to the screw hole 2 2 . 4, the axial blocks 2 5 4 and 2 6 4 of the reflow elements 2 5 and 26 are placed on the bearing surfaces 2 1 3 and 2 2 3, and the choke elements 25, 2 6 return channel 2 5 6 , 2 6 6 opening 2 6 7 , then the screw groove 2 of the nut 20 , the reflow 9 200811381 channel 2 5 6 , 2 6 6 through hole 2 θ 3 Then, for the positive raceway 2 4 , as shown in FIG. 7 , the ball in the nut 20 can be rolled to the left from the right side of the spiral groove 27 7 and then return from the return element 2 5 . The opening enters the choke channel 2 5 6 , enters the raceway 24 , enters the return channel 2 6 6 of the other reflow element 26 6 , and finally enters from the opening 2 6 7 of the return channel 26 6 The spiral groove 2 7 ' which is connected to the choke channel 26 6 constitutes a path for the ball to flow back. Please refer to Figures 5 and 6 again. The choke element 2 5, 2 can be composed of two upper and lower blocks 2 6 8 and 2 Θ 9 (only illustrated by the choke element 26). The flow avoiding element 26 is divided by the position of the flow path 266-half, and the choke element 26 is cut into upper and lower bodies 2 6 8 and 2 69, and the bottom end of the upper block 268 is There are several protrusions 268 1 and 2 6 8 2, and the upper end surface of the lower block 2 6 9 is provided with a plurality of grooves 2 6 9 1 and 2 6 9 2 opposite to the protrusions 2 6 8 1 and 2 6 8 2 . The protrusions and the concave grooves are similar in size, and the protrusions 2 6 8 i, 2 6 8 2 can be inserted into the grooves 2691 and 26 9 2 to fix the upper and lower blocks 268 and 269. Integral; please refer to Figures 3 and 7 again, when the two choke elements 2 5 2 6 (dotted line) of the present invention are placed on the nut 2, the radial direction of each reflow element 2 5, 26 The width of the blocks 255, 265 is smaller than the total width d of the spiral groove 27 and the two peaks 28 on both sides thereof, and the groove is provided for the radial block 2 5 200811381 5, 265 (not shown) 2 1 The width of 22 must also be set to be close to the width D of the radial block 2 5 5, 2 6 5, ie, it is only The tooth peaks 28 on both sides of the spiral groove 27 must be partially cut off, that is, the corresponding two radial blocks 2 5 5, 2 6 5 can be embedded, so that the two tooth peaks 28 still retain their guidance. The function of the ball, the turning path of the flow path 2 5 6 and 2 6 6 of each choke element 2 5, 2 6 can be designed in the axial block 2 5 4, 2 6 4 to make the respective 迴After the flow path 2 5 6 , 2 6 6 is turned to the request, and the solution is solved, and then as shown in FIG. 8 , for each of the nut 28 having a small thickness of 2 8 , each reflow element 2 5 , When the radial block 2 5 5, 2 6 5 of the 6 6 is inserted into the tooth peaks 28 on both sides of the spiral groove 2 7 , each radial block 2 5 5 , 2 6 5 is adjacent to the two teeth Peak 2 8 parallel' makes it difficult to break when the tooth peak is cut off by 2 8; with the structural design of the present invention, it is impossible to provide a current-avoiding element at both ends of the nut and a lead angle of the same day. A solution to the problem, at the same time, the structural design of the present invention is not limited to the nut of the low lead angle, and the nut of various lead angles is applicable. In summary, the present invention is practical and progressive, and the applicant has not found the same or similar approximation through the domestic and foreign literatures, and the present invention is in line with the invention relating to the patent law, and is proposed according to law. please. 200811381 [Simple description of the diagram] Figure 1 is an exploded perspective view of a conventional nut and reflow element. Figure 2A shows the application of a conventional choke element to a nut with a large lead angle. Figure 2B shows a conventional choke element applied to a screw with a small lead angle. FIG. 3 is an exploded perspective view of the screw nut and the reflow element of the present invention. Figure 4 is a perspective exploded view of the choke element of the present invention mounted on a nut. Figure 5 is an exploded perspective view of the choke element of the present invention. Figure 6 is a perspective assembled view of the choke element of the present invention. Figure 7 is a diagram showing the use of the current-avoiding element of the present invention for a screw having a small lead angle. Fig. 1 is a cross-sectional view of the first embodiment of the present invention. The radial block of the choke element of the present invention is set to be parallel to the tooth peak. A. Intent. Surface [Description of main components] 1 0 Nut 1 1 threaded portion 1 2 slotted 121 socket 12 2 socket 1 2 3 perforation 13 slot 131 socket 13 2 socket 1 3 3 perforation 1 4 raceway 15 reflow element 151 return channel 15 2 straight portion 1 5 3 curved portion 16 Flow element 161 escape channel 16 2 straight portion 1 6 3 bend portion 1 7 spiral groove 1 8 tooth peak 2 0 nut 2 1 slit 2 1 1 groove 2 1 2 perforation 213 bearing surface 2 1 5 screw 2 2 Groove 2 2 1 recess 2 2 2 perforation 2 2 3 bearing surface 2 2 5 screw 2 3 threaded part 2 4 raceway 2 5 reflow element 2 5 1 counterbore 2 5 2 perforation 2 5 3 outlet 2 5 4 axis To the block 2 5 5 radial block 2 5 6 avoidance channel 2 6 flow element 12 200811381 2 61 counterbore 2 6 3 through hole 2 6 5 radial block 2 6 6 return channel 268 upper block 2681 convex Column 269 lower block 2691 groove 2 7 spiral groove 2 8 tooth peak 2 6 4 axial block 2 6 7 inlet 2 6 8 2 protrusion 2 6 9 2 groove
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