M404907 五、新型說明： 【新型所屬之技術領域】 ^創作係有關於-種應用於線性傳動的滚珠螺桿構件 尤心種可使浪珠迴流更為順暢之内循環式滾珠螺桿迴 流元件。 【先前技術】 ' 精密機械中常有需要控制工作平台或加工元件移 羞動之认计’而為了能夠精確且小摩擦係數的掌控移動進終 ❿量，該移動都利用滾珠螺桿進行精密的傳動，而滚珠螺^ 上設有-螺桿及-螺帽，為了減少摩擦力的產生因此該螺 桿與螺帽間使用有複數滾珠配合，滚珠並必須能在螺帽内 重複的循環滾動，該循環滾動是利用設置循環系統於螺帽 上所完成。 @為使各滚珠螺桿内的該些滾珠在該螺帽與該螺桿間 進行循環，就必須在該滾珠螺桿上設置迴流結構，目前市 鲁 Φ上已有多種迴流結構出現，通常分為内循環式、外循環 式及端塞式，其中内循環式滾珠螺桿係使用迴流元件，由 内往外組裝於螺帽周緣預設之容置孔，並跨置於螺帽内緣 的二螺旋槽上’該迴流元件上形成有提供滾珠通過之迴流 道及做為支持迴流元件於螺帽定位之兩延伸臂，藉該迴流 道與螺旋槽銜接構成-循環路徑，使滾珠在該循環路徑内 不斷地循環作動’俾令該螺帽順利進行線性運動。 该習知内循環式滾珠螺桿之迴流元件，當滚珠在進入 迴流兀件上的迴流道時，由於螺帽之螺旋槽係採用哥德式 3 M404907 溝槽形狀，而迴流元件的迴流道兩端為一圓弧形彎道，因 此滾珠之迴流易受該圓弧彎道之弧度、長度及兩側延伸臂 位置影響，使得滾珠在進出迴流元件時容易產生卡珠或撞 擊的現象，進而導致滾珠迴流的不順暢狀況，產生噪音、 影響作動精密度及縮短使用壽命。 【新型内容】 本創作人有鑑於習知内循環式滾珠螺桿之迴流元件， 其供滾珠進行迴流時，易發生卡珠或撞擊的現象，是以乃 思及創作的意念，經多方探討與試作樣品試驗，及多次修 正改良後，終推出本創作。 本創作提供一種内循環式滚珠螺桿之迴流元件，其迴 流元件為一概呈長圓形之塊狀體，由内往外組裝於螺帽周 緣預設之容置孔内，該迴流元件上設有提供滾珠通過之迴 流道及做為支持迴流元件於螺帽定位之兩延伸臂，該迴流 道兩端進出口處各設置一圓弧形彎道，該圓弧形彎道中心 線一半長度及内側圓弧邊半徑約略與滾珠直徑相等，另該 兩延伸臂之中心線恰延伸通過圓弧形彎道之中心點，使得 滾珠迴流時可順暢滾動。 本創作之主要目的，在於其迴流道兩端進出口處之圓 弧形彎道中心線長度及内側圓弧邊半徑係依照滾珠直徑比 例設置，以及其兩延伸臂之中心線對正圓弧形彎道之中心 點，使滾珠迴流循環運動更為順暢，降低噪音、確保作動 精密度及延長使用壽命。 【實施方式】 M404907 餘下a配。圖式將本創作較佳實施例詳細說明如后 二圖作内循環式滾珠螺桿之立體分解圖、第 :螺2=件之平面圖、第三圖本創作内循環式滚 叫面及第四圖糊作⑽環式_螺桿之 二面不μ所^摘作㈣環歧珠螺桿係包含：-螺M404907 V. New description: [New technical field] ^There is a kind of ball screw component used in linear transmission. It is a kind of circulating ball screw returning element which can make the ball return more smoothly. [Prior Art] 'In precision machinery, there is often a need to control the work platform or the shaving of the machining components'. In order to control the movement and the final amount with precise and small friction coefficient, the movement is precisely driven by the ball screw. The ball screw has a screw and a nut. In order to reduce the friction, the ball and the nut are used with a plurality of balls. The ball must be repeatedly cycled in the nut. The cycle is This is done by setting the circulation system on the nut. @ In order to make the balls in each ball screw circulate between the nut and the screw, it is necessary to provide a reflow structure on the ball screw. At present, various reflow structures have appeared on the city Φ, which is usually divided into inner circulation. Type, external circulation type and end plug type, wherein the inner circulation type ball screw system uses a reflow element, which is assembled from the inside to the outside in a predetermined hole of the nut periphery and spans on the two spiral grooves of the inner edge of the nut' The return element is formed with a return passage for providing a ball passage and two extension arms for supporting the reflow member to be positioned on the nut, and the return passage is coupled with the spiral groove to form a circulation path for continuously circulating the ball in the circulation path. Actuate '俾 to make the nut smoothly linear motion. The reflow element of the conventional inner-circulating ball screw has a Gothic 3 M404907 groove shape when the ball enters the return path on the reflow element, and the return flow path of the reflow element is A circular arc curve, so the reflow of the ball is susceptible to the curvature of the arc curve, the length and the position of the extension arms on both sides, so that the ball is prone to beading or impacting when entering and exiting the reflow element, thereby causing the ball to reflow. The unsmooth condition produces noise, affects the precision of operation and shortens the service life. [New content] This creator has the reflow element of the conventional inner-circulating ball screw, which is prone to the phenomenon of jamming or impact when the ball is reflowed. It is the idea of creating and testing the sample. After the experiment, and many revisions and improvements, the creation of this creation was finally made. The present invention provides an inner circulation type ball screw reflow element, wherein the reflow element is an oblong block body which is assembled from the inside to the outside in a predetermined receiving hole of the periphery of the nut, and the reflow element is provided The ball passes through the return channel and serves as two extension arms for supporting the reflow element to be positioned on the nut. The arc-shaped curve is respectively arranged at the two ends of the return channel, and the center line of the arc-shaped curve has a half length and an inner circle. The radius of the arc edge is approximately equal to the diameter of the ball, and the center line of the two extension arms just extends through the center point of the arcuate curve, so that the ball can smoothly roll when reflowing. The main purpose of this creation is that the length of the center line of the arc-shaped curve and the radius of the inner side of the arc at the entrance and exit of the return flow are set according to the ball diameter ratio, and the center line of the two extension arms is aligned with the arc. The center point of the curve makes the ball return circulation movement smoother, reducing noise, ensuring precision of operation and prolonging service life. [Embodiment] M404907 is equipped with the remaining a. The drawings illustrate the three-dimensional exploded view of the inner-circulating ball screw, the second: the plan view of the screw 2=piece, the third figure, the inner circulation type rolling surface and the fourth figure. Paste (10) ring type _ screw two sides not μ ^ ^ (4) ring bead screw system contains: - snail
H表面設有螺旋槽11螺帽2，具有與螺桿1相對 之螺々槽2卜周緣設有至少—連通至内部穿孔之容置孔22 丄該容置孔22兩端係各難螺旋槽21連接；複數滾和， 没於螺桿1之螺旋槽U與螺帽之螺旋槽21間；至少一迴流 元件4’該迴流元件4為—概呈長圓形之塊狀體，由内往2 組裝於螺帽2之容置孔22内，跨置於螺帽2内緣的二螺旋槽 21上，構成一循環路徑，該迴流元件4上設有提供滾珠3通 過之迴流道41及做為支持迴流元件4於螺帽2定位之兩延伸 臂42，該迴流道41中間設置一直線段4η，兩端進出口處 各設置一圓弧形彎道412，該圓弧形彎道412中心線一半長 度L約略與滾珠直徑相等，内側圓弧邊半徑r約略與滾珠直 徑相等，而可容許滾珠3順暢滾動通過，另該兩延伸臂“ 係設置於迴流道41兩側，且該兩延伸臂42之中心線恰延伸 通過迴流道41兩端圓弧形彎道412之中心點。 而可於螺桿1旋轉時，令滾珠3於螺桿1之螺旋槽11與 螺帽2之螺旋槽21間滾動，當滾珠3滾動至迴流元件4時， 由迴流元件4迴流道41 一端之圓弧形彎道412進入，經直線 段411後由另端之圓弧形彎道412滾出，進入迴流元件4跨 5 M404907 置之螺帽2的另-螺旋槽21與螺桿j對應的螺旋槽】】間，依 此方式不斷地循環迴流滚動’俾令該螺帽2順利進行線性 運動。 由上述具體實施例之結構，可得到下述之效益：其迴 流兀件4迴流道41兩端進出口處之圓弧形彎道412十心線一 半長度L及内側圓弧邊半徑r與滾珠直徑約略相等，同時迴 流兀件4兩延伸臂4 2之中心線對正圓弧形彎道4丨2之中心點 ，而使得滾珠3可更為順暢由螺帽2之螺旋槽21 件4之圓弧形彎道412，及由圓弧形彎道412進入螺帽2之螺 旋槽21，避免造成卡珠及大幅降低撞擊現象，進而降低噪 音、確保作動精密度及延長使用壽命。 綜上所述，本創作確實已經達於突破性之結構，而具 有改良之難内容’同時又能夠達到產業上利祕與進^ 性，當符合專利法之規定，爰依法提出新型專利申請，懇 請鈞局審查委員授予合法專利權，至為感禱。 【圖式簡單說明】 第一圖：係本創作内循環式滾珠螺桿之立體分解圖。 第二圖：係本創作迴流元件之平面圖。 第三圖··係本創作内循環式滾珠螺桿之立體透視圖。 第四圖：係本創作内循環式滾珠螺桿之剖面示意圖。 【主要元件符號說明】 〜 1 螺桿 11螺旋槽 2 螺帽 21 螺旋槽 容置孔 3 滾珠 22 M404907 4 迴流元件 41 迴流道 411 直線段 412 彎道 42 延伸臂The H surface is provided with a spiral groove 11 nut 2, and the screw groove 2 opposite to the screw 1 is provided with at least a receiving hole 22 communicating with the inner perforation. The two ends of the receiving hole 22 are each a difficult spiral groove 21 Connection; multiple rolling, not between the spiral groove U of the screw 1 and the spiral groove 21 of the nut; at least one reflow element 4' of the reflow element 4 is a substantially oblong block, assembled from the inside to the 2 In the accommodating hole 22 of the nut 2, the two spiral grooves 21 are disposed on the inner edge of the nut 2 to form a circulation path. The reflow element 4 is provided with a return passage 41 for providing the ball 3 to pass through and as a support. The reflow element 4 is disposed on the two extending arms 42 of the nut 2, and the return line 41 is provided with a straight line segment 4n therebetween, and a circular arc-shaped curve 412 is formed at each of the two ends of the two ends, and the arc-shaped curved line 412 has a half line length L is approximately equal to the diameter of the ball, and the radius r of the inner side of the arc is approximately equal to the diameter of the ball, and the ball 3 is allowed to smoothly pass, and the two extension arms are disposed on both sides of the return path 41, and the two extension arms 42 The center line extends just past the center point of the arcuate curve 412 at both ends of the return passage 41. When the rod 1 rotates, the ball 3 is caused to roll between the spiral groove 11 of the screw 1 and the spiral groove 21 of the nut 2, and when the ball 3 rolls to the reflow element 4, the arc-shaped curve of one end of the return path 41 is returned by the reflow element 4. 412 enters, passes through the straight line segment 411 and is rolled out by the arcuate curved corner 412 at the other end, and enters the spiral groove 21 corresponding to the screw j of the nut 2 of the reflow element 4 spanning 5 M404907. In this way, the recirculating rolling is continuously circulated to enable the nut 2 to smoothly perform linear motion. From the structure of the above-described embodiment, the following benefits can be obtained: the returning member 4 is at the inlet and outlet of the return passage 41 The arcuate curve 412 has a half line length L and an inner side edge radius r which are approximately equal to the ball diameter, and the center line of the return arm member 4 and the extension arm 4 2 aligns with the center of the arcuate curve 4丨2 Pointing, the ball 3 can be made smoother by the arcuate curve 412 of the spiral groove 21 of the nut 2, and the spiral groove 21 of the nut 2 can be entered by the arcuate curve 412 to avoid causing the ball and the ball Significantly reduce the impact, thereby reducing noise, ensuring precision and extending service life. As a result, this creation has indeed reached a groundbreaking structure, and it has the content of improvement. At the same time, it can achieve the industry's secrets and advancement. When it meets the requirements of the Patent Law, it proposes a new type of patent application according to law. The examination committee grants legal patent rights, and is praying. [Simplified illustration] The first picture: the three-dimensional exploded view of the circulating ball screw in this creation. The second picture: the plan of the reflow element of this creation. ····················································································· Hole 3 Ball 22 M404907 4 Return element 41 Return line 411 Straight line 412 Curve 42 Extension arm