200912163 九、發明說明： 【發明所屬之技術領域】 本發明與滾珠螺桿有關，特別是指—種在螺帽外設置螺 旋通道的外循環式滾珠螺桿。 【先前技術】 一滚珠螺桿是以滾珠減少螺桿與螺帽間的摩擦力，故具有 商精密度與低聽耗損的優點，而滾珠螺桿目前被積極開發 的重點’是在於滾珠的迴流方式，其種類與式樣繁多，有直 接將螺帽的螺紋兩如管子連通的設計，有在螺帽設置端塞 與迴流通這的設計，有將螺帽的螺紋以迴流蓋連接成封閉路 挺的設計;_還有在螺帽外側設置通道供滚珠迴流的設計； 不過前述各種設計’如螺帽的螺紋兩端以管子連接或螺 帽设置端塞與迴流通道的設計，滾珠在進奸子或迴流通道 日其滾動路徑的轉角往往接近9G度，遂造成滾珠滾動上 的不順暢，而將螺帽螺紋連㈣__的設目 迴流蓋加工與安梦沾％ s θ 、,、、、 的决差，使迴流蓋與螺帽螺紋間具有落 差’造成滾珠滚動絲讲贫¥ t , 、'二匕〜差而不順暢，且以迴流蓋使滾珠在 短距離滾動至相鄰螺紋而迴流，滾珠必須越過螺桿的—個 牙，更會影響滚珠螺桿作動的順暢度； 另外就螺帽外側設置通道設計的習知技術來說，如美國 5 200912163 專利木#u 3142929(如第^圖所示）以及專利案號6Q41672(如 $ 2圖所不）兩件來說’分別是在螺帽A外設置與内螺紋 MU 1圖未繪出）連通的通道A2,並在該通道A2的兩端設 置導引滾珠B的導引凡件c，讓該些滾珠β能夠受導引而由 5亥内螺紋A1進入該通道A2，或是由該通道A2進入該内螺 紋^，達到讓該些滾珠B循環的目的，在第3圖，更示竟 料利案號_咖中，該導引元件c讓該些滾珠β在該螺 巾目A與螺桿D間迴流的情形； '/此—種滾珠螺桿，其主要設計上用以導引該些滾珠B 二峨’卻具有-個相當嚴重的缺陷，那就是該些滾 5 ^螺帽A的_紋A1與通道A 2騎㈣，是由該導 而卜力齡⑷卜才歧變該麵珠B的滾動方向 向而會讓該麵珠6在絲日扣外力改變滾動方 產生不順暢的狀況，更有可能會造偷滾 Γ與該導引元件c的碰撞，縮短該導引元件C的使” 命，而徒增維修費用。 免用可 可知以往不論是直接將螺帽的螺 螺帽嗖罟π會出、^ J而以s子連通、在 而基人迴〉巩通道、將螺帽的螺纹以迴产 閉路徑或是螺帽外側設置通道，_ ^連接成封 的問題，曰〜 ' 午决滾珠迴流不順暢 亀且剛述兩種習用的滾珠· 干退更必須使用導引元 200912163 件來導㈣珠迴流，除滚珠滾動不外，更料產生了導 引兀件易與滾珠碰撞而損壞的問題，因此本發明人憑藉自身 t滾珠螺桿方_執額實_驗，針對滾珠絲順暢的目 的加以研究與改良，進而開發出—種外猶環式滾珠螺桿。 【發明内容】 本發明外循環式滾珠螺捍，立 中滾動地—並顧環過程 為達前述目的’該外彳時式滾珠 置螺旋通道，該螺旋通道環繞在該螺帽外側:、22側設 與該螺帽内側的内螺紋兩者螺旋方向相反^^通道 該螺帽内側的螺紋連通形成— 通道並與 環通道内滾動且循環； < k奴數滾珠便在該循 滾珠由該内螺紋進入該螺旋 通這進人該_紋時，•兩者^ 2由該螺旋 相接，因此該些滚珠不論是由該内螺疋方向配置而 由該螺旋通道進入該内螺紋，都是以：螺旋通道或是 ，角度幾乎都沒有改變，故滾珠滾動的動，方 "裹滾珠滾動更為順暢。 角相畲的小，能 200912163 此外，該職㈣可麵為與該㈣紋的觀路徑相應 的螺紋狀’以增㈣些滾珠滾動的;㈣度； 心 且該螺旋通道與該内螺紋之間的連通， 上…-办π ^ j直接在4螺帽 螺旋通道 開叹-牙孔’紅穿孔並分別連通該内螺紋與該 的兩端而形成該循環通道； 螺帽外套設— 外罩與該螺旋通道之 另外，該螺旋通道還可製成槽狀，並在該 外罩，以該外罩將該些滾珠限位在該 間。 【實施方式】 本發明外循環式滾珠螺桿，每 v，其包含： 纟味^例如第4圖至第9圖所 一螺桿10，外侧設置有螺紋U ; -螺帽20，套設在該螺捍 及第 fim - + β 成螺巾目20如第5圖 圖所不’在其内側面與外侧面 及螺旋通道22,且該内蟬咬21选品 叹置内累、'文21以 m 21截面形狀為歌德牙形，該螺 t運22截面形狀為圓弧牙形 ，、 的虫罗妗η丄 門螺紋21與該螺桿1〇 的蜍紋11相對應，該螺旋 少一 _ β β 繞在該螺帽20外側至 "圈，该螺旋通道22與該内螺紋21的峨# 。亥通道22與該内螺紋21 且 上ϋΡΙη·咖 、累方疋路杈柯應，該螺帽20 工亚開设二穿孔23，續-办7丨η υ 牙孔23分別連通該内螺紋21與 200912163 购旋通道^兩端，㈣㈣紋21、螺師 牙孔23形成—循環通道24 ; 、 及一 複數滾珠30，芎署# 循環；以及 β在销帽2〇的循環道通24内進行 一外罩4Q’如第Μ所示，套設在該螺 螺帽職則面開設複數螺孔25,該外罩 外〇且該 該些螺孔25而鎖設在該螺帽2。外。 &絲5〇配合 該些滾珠30滾動猶環的示意圖如第4圖 9圖所示，該些滚珠3。在該螺帽2〇 二=弟 21滾動時，會同時在該螺捍1Q的螺紋η滾動，螺紋 珠3〇在該循環通道24的螺旋通道22滾動=些滚 罩40的限位不致掉出； 、r則&文該外 该些滾珠30在該螺帽2〇的内 紋11間滾動，”_ 4 Q …文21與该螺桿10的螺 該穿孔23_= 螺紋21通過 魏銜接，故該些滾珠30能 円、紋21〉衰入該螺旋通道22; 反之，當該些滾珠3〇由竽 進入該内螺纹21日士 〜疋通運22通過該穿孔23 、' 亦一順暢地由該螺旋通道22滾入該 200912163 内螺紋21 ; 由前述可知，兮 内滾動時，不技3 ^…衰殊3〇在該螺帽20的循環通道24 由今 ㈣疋4内螺紋21滾入該螺旋通道22，或是 々十二 /衰入该内螺紋21 ,由於兩者是以相反的螺 疋。配置’再加上該内螺紋21與該螺旋通道心者是以 目i：的螺％路錢接，因此該些滚珠％都是以同—旋轉方 向滾動1方向與角度幾乎都沒有改變，與使用導引元件c 強U改I： 4些;袞珠β滾動方向的習知技術相較，本發明能约 讓该些滾珠30的滾動更為順暢，再加上並不需要額外％ ° 導引用的元件，所以也能減少使用的元件數量與組掌時門 而可以更進一步地節省生產的成本。 10 200912163 ' 【圖式簡單說明】 第1圖 習知滾珠螺桿在螺帽外侧設置通道的示意圖。 第2圖 習知另一種滚珠螺桿在螺帽外侧設置通道的示意圖。 第3圖 第2圖導引元件導引滾珠迴流的示意圖。 第4圖 本發明實施例螺桿、螺帽、滾珠與外罩配合的示意圖。 第5圖 本發明實施例螺帽的立體圖。 第6圖 本發明實施例螺帽的侧視圖。 # 第7圖 本發明實施例螺帽與外罩配合組裝的示意圖。 第8圖 本發明實施例滾珠迴流的示意圖。 第9圖 本發明實施例外罩限位滚珠的示意圖。 【主要元件符號說明】 《習知技術》200912163 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a ball screw, and more particularly to an outer-circulating ball screw in which a spiral passage is provided outside a nut. [Prior Art] A ball screw is a ball that reduces the friction between the screw and the nut, so it has the advantages of quotient precision and low hearing loss. The focus of the ball screw is currently actively developed, which is the ball reflow method. There are many types and styles, there are designs that directly connect the threads of the nut to the pipe, and there is a design in which the nut is placed at the end plug and the return flow, and the thread of the nut is connected by the return cover to form a closed road. _ There is also a channel on the outside of the nut for the ball to recirculate the design; however, the various designs mentioned above, such as the end of the thread of the nut, are connected by a pipe or a nut to set the end plug and the return channel, and the ball is in the adult or return channel. The corner of the rolling path is often close to 9G degrees, which causes the ball to roll unsmoothly, and the nut thread is connected to the (4) __ setting of the reflow cover processing and the difference between the s θ θ , , , , , The gap between the return cap and the nut thread is made to cause the ball rolling wire to be poor, and the difference between the two is not smooth, and the ball is rolled back to the adjacent thread with a reflow cap to reflow. It is necessary to pass over the teeth of the screw, which will affect the smoothness of the action of the ball screw. In addition, the conventional technique of setting the channel design on the outside of the nut is as shown in US 5 200912163 Patent Wood #u 3142929 (as shown in Fig. 2). And the patent case No. 6Q41672 (such as the $2 figure), the two parts are respectively 'the outside of the nut A is arranged with the internal thread MU 1 is not shown) channel A2, and is set at both ends of the channel A2 Guide the ball C to guide the workpiece c, so that the balls β can be guided to enter the channel A2 by the 5 Phillips thread A1, or enter the internal thread ^ by the channel A2 to reach the balls B The purpose of the cycle, in Figure 3, further shows the situation of the case number _ coffee, the guiding element c allows the balls β to flow back between the screw head A and the screw D; '/ this kind of ball The screw, which is mainly designed to guide the balls B, but has a rather serious defect, that is, the _ grain A1 of the roller 5^ nut A and the channel A 2 ride (four) are Guided by Bu Liling (4), the difference in the direction of the rolling of the bead B will cause the bead 6 to change the rolling force on the wire. In a smooth condition, it is more likely to cause a collision between the sneaking and the guiding member c, shortening the life of the guiding member C, and increasing the maintenance cost. No need to know whether the nut is directly used in the past. The screw nut 嗖罟 π will appear, ^ J and s sub-connected, and the base person will return to the channel, the thread of the nut will be set back to the closed path or the outer side of the nut, _ ^ connected to the seal The problem, 曰~ 'The ball reflow is not smooth, and the two balls are just mentioned. The dry retreat must use the guide element 200912163 to guide the (four) bead reflow, except for the rolling of the ball, it is more likely to produce a guide. The inventors have been able to collide with the ball and damage the ball. Therefore, the inventors have researched and improved the purpose of smoothing the ball by virtue of their own t-ball screw, and developed an outer heave ring ball screw. SUMMARY OF THE INVENTION The outer-circulating ball screw of the present invention, which is rolled up in the middle and takes care of the ringing process, is the outer-side ball-shaped spiral channel, which is surrounded by the outer side of the nut: 22 sides The inner thread of the inner side of the nut is opposite to the spiral direction. The threaded inner thread of the nut is connected to form a passage and is rolled and circulated in the ring passage; < k slave ball is in the ball When the thread enters the spiral passage, the two sides are connected by the spiral, so that the balls are disposed by the spiral passage into the internal thread regardless of the direction of the inner thread. : The spiral channel or the angle is almost never changed, so the ball rolling motion, the square " wrapped ball rolling more smoothly. The angle is small, can be 200912163. In addition, the position (4) can be in the shape of a thread corresponding to the path of the (four) pattern to increase (four) some ball rolling; (four) degree; the heart and the spiral channel and the internal thread Connected, on...-do π ^ j directly in the 4 nut spiral channel sigh - the perforation 'red perforation and respectively connect the internal thread with the two ends to form the circulation channel; nut coat - cover and In addition, the spiral passage may also be formed in a groove shape, and in the outer cover, the outer cover may be used to limit the balls therebetween. [Embodiment] The outer-circulating ball screw of the present invention, each v, comprises: a scent ^, for example, a screw 10 of Figs. 4 to 9 is provided with a thread U on the outer side; a nut 20 is sleeved on the snail捍 and the first fim - + β into the spiral head 20 as shown in Fig. 5, in the inner side and the outer side and the spiral passage 22, and the inner bite 21 is selected to be sighed, 'wen 21 to m The cross-sectional shape of the 21 is Goethe tooth shape, and the cross-sectional shape of the screw is 22 arc-shaped, and the worm thread 21 of the worm 妗 丄 相对 corresponds to the 蜍 11 of the screw 1 ,, the spiral has a less _ β β Wrap around the outside of the nut 20 to the "ring, the spiral passage 22 and the internal thread 21 of the 峨#. The passage 22 and the internal thread 21 and the upper ϋΡΙ · 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 With the 200912163 purchase of the rotary channel ^ both ends, (four) (four) pattern 21, the screw hole 23 formed - the circulation channel 24; and a plurality of balls 30, the Department # cycle; and β in the pin cap 2 〇 loop pass 24 A cover 4Q' is disposed on the surface of the nut to open a plurality of screw holes 25, and the outer cover is externally locked and the screw holes 25 are locked to the nut 2. outer. & wire 5 〇 该 该 该 该 该 该 滚 滚 滚 滚 滚 滚 滚 滚 滚 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图 示意图When the nut 2 〇 2 = brother 21 rolls, the thread η of the thread 1Q rolls at the same time, and the threaded beads 3 滚动 roll in the spiral passage 22 of the circulation passage 24 = some of the limits of the roller cover 40 do not fall out ; , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The balls 30 can be smashed into the spiral passage 22; otherwise, when the balls 3 are inserted into the internal thread 21 by the cymbal, the 疋 疋 22 is passed through the perforation 23, 'is also smoothly The spiral passage 22 is rolled into the internal thread 21 of the 200912163; as can be seen from the foregoing, when the inside of the crucible is rolled, the failure is not circumvented. The circulation passage 24 of the nut 20 is rolled into the spiral from the inner (four) 疋4 internal thread 21 Channel 22, or 々12/fading into the internal thread 21, since the two are opposite threads. The configuration 'plus the internal thread 21 and the spiral channel is the imaginary path of the eye i: The money is connected, so the balls are all rolled in the same direction - the direction of rotation is 1 direction and the angle is almost unchanged, and the guiding element c is used to change U: 4; Compared with the conventional technique of the bead β-rolling direction, the present invention can make the rolling of the balls 30 smoother, and the components that do not need extra reference are needed, so that the use can be reduced. The number of components and the group of gates can further save the cost of production. 10 200912163 ' [Simple description of the drawings] Figure 1 shows a schematic diagram of the ball screw on the outside of the nut. Figure 2 shows another ball Schematic diagram of the screw providing a channel on the outer side of the nut. Fig. 3 is a schematic view showing the guiding element guiding the ball reflow. Fig. 4 is a schematic view showing the cooperation of the screw, the nut, the ball and the outer cover according to the embodiment of the invention. Fig. 6 is a side view of the nut of the embodiment of the present invention. Fig. 7 is a schematic view showing the assembly of the nut and the outer cover of the embodiment of the present invention. Fig. 8 is a schematic view showing the ball reflow according to the embodiment of the present invention. 9 is a schematic view of the invention implementing the exception cover limit ball. [Main component symbol description] "Knowledge Technology"
螺帽A 1 内螺紋A1Nut A 1 internal thread A1
通道A2 滚珠B 導引元件C 螺桿D 11 200912163 《本發明》 螺桿10 螺紋11 螺帽20 内螺紋21 螺旋通道22 穿孔23 循環通道24 螺孔25 滚珠30 外罩40 螺絲50 12Channel A2 Ball B Guide element C Screw D 11 200912163 <<Invention» Screw 10 Thread 11 Nut 20 Internal thread 21 Spiral passage 22 Perforation 23 Circulation passage 24 Screw hole 25 Ball 30 Cover 40 Screw 50 12