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—種在端蓋上設置導 引件以‘引滾珠迴流的具迴流裝置之滾珠螺桿。 【先前技術】 滾珠螺桿發展至今，技術上已相#的成熟’其中在滾珠 迴流方面，以往是由外部的通道讓滾珠進行循環，但經由外 ，通道難免會有佔”以及可能因外力造成通道脫落的問 題’因此產業界便開發出_環式的流道以解決此問題，而 内亀有多種循環技術，有一種是在螺帽内開設循環通 C並讓;袞珠通過该循^裒通道進行循環的内循環技術，於下 舉出二例來說明目前此種内循環的技術； ’、如美國專利第5988007號，示於第1圖，其螺帽A 内。P軸向開叹-循壤通道A卜該螺帽A兩端並分別設置一 迴流裝置10 且该迴流裝置1〇由一端蓋u及一輔助件12 構成’該端蓋11及該辅助件12結合後形成—通道13，滾 珠便此由忒螺帽A的螺紋A2經該迴流裝置1〇的通道13進 入及循％通運A1進行循環’或由該循環通道A1通過該通道 13進入該螺帽的螺紋A2内作動； 但此種迴流裝置1G卻有著成本昂貴的缺點，由於該迴 1322240 流裝置10在製作上需成型該通道13，因此該端蓋11與該 輔助件12上皆必須另外進行加工，製程較為繁雜與耗時， 遂造成製造成本的上升。 此外，還有另一種如美國專利第4148226號，示於第2 圖，此種迴流裝置20是由一端蓋21、一輔助件22及一定 位件2 3組成，該輔助件2 2及該定位件2 3依序組裝在該端 蓋21上，且該端蓋21上與該輔助件22上各成型一凹槽 211、221，該二凹槽211、221並配合形成一通道（圖中未 示），該定位件23上則相應該通道成型一穿孔231，該迴流 裝置20並由該定位件23之側組裝在滾珠螺桿的螺帽上，且 該定位件23的穿孔231與螺帽的循環通道配合，如此滚珠 便能由螺帽的螺紋經該迴流裝置20的通道及穿孔231進入 螺帽的循環通道A1進行循環，或由循環通道通過該穿孔231 及通道進入螺帽的螺紋内作動； 而此種迴流裝置20亦有著成本昂貴的缺點，因其由三 元件構成該迴流裝置20，故加工成本相對提高，且該端蓋 21與該輔助件22上亦必須加工成型該凹槽211、221以供 滾珠進行迴流，可知製程一樣費時繁雜，製造成本依然難以 降低。 6 1322240 - 可知以往端蓋式的滾珠螺桿，其迴流裝置雖已實用一段 . 時日，但其製造成本依然難以壓低，而價格偏高的結果，就 是造成客戶購買意願下降，所以本發明者便針對以往端蓋式 滾珠螺桿其迴流裝置價格昂貴的問題加以研究，進而開發出 一種成本低廉又減少噪音的具迴流裝置之滾珠螺桿。 【發明内容】 φ 本發明具迴流裝置之滾珠螺桿第一目的在於降低製造 成本。 • 第二目的在於降低滚珠滚動的噪音。 為達前述目的，該迴流裝置組裝在螺帽上，且包含一端 蓋及至少一導引件，其中該導引件供導引滾珠進行循環迴 流，因此該端蓋上只需成型供該導引件設置的位置，不需另 • 外加工成型任何通道，如此便能夠降低該端蓋的加工成本與 時間，且該導引件可以塑膠射出成型的方式製造，能夠進一 步的降低製造成本，此外該導引件由塑膠製成，還可利用塑 ' 膠的材質特性吸收滾珠通過該導引件的噪音。 【實施方式】 本發明具迴流裝置之滾珠螺桿，其實施例如第3圖至第 7 UZ2240 6圖所示，其包含： 一螺桿β，其外側具有螺紋Bi ; :螺帽A’其内側具螺紋A2，該螺以内部並軸向開設 衣通運A1 ’且5玄螺帽A端面上軸向開設若干螺孔仏· 複數滾珠C，設置在朗桿㈣螺紋βι與該螺以的 虫不紋A2之間；以及IX. INSTRUCTIONS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a ball screw, and more particularly to a ball screw having a reflow device in which a guide member is disposed on an end cap to return the ball. [Prior Art] Since the development of the ball screw, it has been technically mature. In the case of ball recirculation, the ball has been circulated by the external passage, but the passage is inevitably occupied by the passage, and the passage may be caused by external force. The problem of falling off' is therefore the industry has developed a ring-shaped flow path to solve this problem, and there are many kinds of circulation techniques in the inner ring. One is to open a loop C in the nut and let the ball pass through the channel. For the internal circulation technique of circulation, two examples are given below to illustrate the current technique of such internal circulation; ', as shown in U.S. Patent No. 5,968,007, shown in Fig. 1, in the nut A. P axially sighs - A recirculating device 10 is disposed at both ends of the nut A, and the reflow device 1 is composed of an end cap u and an auxiliary member 12. The end cap 11 and the auxiliary member 12 are combined to form a passage 13 The ball is thus actuated by the thread A2 of the nut A through the passage 13 of the recirculating device 1 and cyclically through the % transport A1 or by the passage A1 entering the thread A2 of the nut through the passage 13; But this type of reflow device 1G There is a disadvantage of being expensive. Since the 1322240 flow device 10 needs to be formed into the channel 13 during the manufacturing process, the end cover 11 and the auxiliary member 12 must be separately processed, and the process is complicated and time consuming, resulting in manufacturing cost. In addition, there is another type, such as U.S. Patent No. 4,148,226, which is shown in Fig. 2. The reflow device 20 is composed of an end cap 21, an auxiliary member 22 and a positioning member 23, and the auxiliary member 2 2 And the positioning member 23 is sequentially assembled on the end cover 21, and a recess 211, 221 is formed on the end cover 21 and the auxiliary member 22, and the two recesses 211, 221 cooperate to form a channel ( The locating member 23 is formed with a through hole 231 corresponding to the passage. The recirculating device 20 is assembled on the nut of the ball screw by the side of the positioning member 23, and the through hole 231 of the positioning member 23 is The circulation passage of the nut cooperates, so that the ball can be circulated by the thread of the nut through the passage of the return device 20 and the through hole 231 into the circulation passage A1 of the nut, or the circulation passage passes through the through hole 231 and the passage into the nut. Actuated within the thread; and this back The flow device 20 also has the disadvantage of being expensive. Since the reflow device 20 is composed of three components, the processing cost is relatively increased, and the recesses 211 and 221 must be formed on the end cover 21 and the auxiliary member 22 for the purpose. When the balls are reflowed, it is known that the process is as time-consuming and complicated, and the manufacturing cost is still difficult to reduce. 6 1322240 - It can be seen that the conventional back-end type ball screw has been used for a period of time. However, the manufacturing cost is still difficult to lower, and the price is biased. The high result is that the customer's willingness to purchase is reduced. Therefore, the inventors have studied the problem that the reflow device of the end cap type ball screw is expensive, and developed a ball screw with a reflow device which is low in cost and reduces noise. SUMMARY OF THE INVENTION φ The first purpose of the ball screw with a reflow device of the present invention is to reduce the manufacturing cost. • The second purpose is to reduce the noise of ball rolling. For the above purpose, the reflow device is assembled on the nut and includes an end cap and at least one guiding member, wherein the guiding member is used for guiding the ball to recirculate, so that the end cap only needs to be shaped for guiding The position of the piece is set without any additional processing, so that the processing cost and time of the end cap can be reduced, and the guiding member can be manufactured by plastic injection molding, which can further reduce the manufacturing cost, and The guide is made of plastic and can absorb the noise of the ball through the guide by the material characteristics of the plastic. [Embodiment] A ball screw having a reflow device of the present invention is embodied as shown in Figs. 3 to 7 UZ2240, and includes: a screw β having a thread Bi on the outer side; a nut A' having a thread on the inner side thereof A2, the screw is internally and axially opened to open the garment A1' and 5 axially open a plurality of screw holes on the end face of the axe cap. The plurality of balls C are arranged in the horizontal rod (four) thread βι and the insect does not line A2 Between;
▲二迴流裝置30，分別組裝在該螺帽A的軸向兩端，且 该各迴流裝置30如第5圖及第6圖所示，包含一端蓋31及 :導引件32 ’該端蓋31為圓環狀且以金屬銑製製造，該端 蓋31與該螺帽a相應的側面上成型四凹槽3ιι，此面上並 轴向開設四穿孔312，以供螺絲D穿過該些穿孔312並鎖入 朗帽A的螺孔A3内，以此將該端蓋31設置在該螺帽a的 —端’該各導引件32以塑膠射出成型製造，且該各導引件 32分別設置在該端蓋31的該各凹槽311中，該各導引件犯 上又成型一迴流道321，該迴流道321則銜接該該螺帽八及 螺桿B的螺紋A2、B1以及該螺帽a的循環通道A1。 冨。玄滚珠C在《玄滚珠螺杯中滾動，其由該螺帽a及螺桿 β的螺紋A2、B1滾動至一端的迴流裝置30時，會通過其中 一導引件32的迴流道321 ’而將該些滚珠c導引至該螺帽Α 的循環通道Α1内，該些滾珠C在通過該循環通道μ後，又 8 1322240 - 會經過另一端迴流裝置30其中一導引件32的迴流道321而 • 進入°亥螺巾s A及螺桿B的螺紋A2、μ内繼續滾動，以此便 可達到遠滾珠C循環迴流的效果； 而此實施例中該迴流裝置3〇上設置四導引件32，其為 使邊迴流裝置30能夠配合具多數循環通道A1的螺帽A，非 限制該導引件32的數量。 鲁綜上所述，本創作具迴流裝置之滾珠螺桿與以往相較， 該端蓋31在製作上只需製作供該些導引件32設置的凹槽 311，並不需另外成型通道，因此製造上較為簡易，可簡化 . 該端蓋31製造的工程以及工時，如此便能夠降低該端蓋31 的製造成本； 此外，该些導引件32由於是由外部設置在該端蓋31 上，因此能夠以塑膠射出成型的方式製造，不僅能夠降低該 • 些導引件32的製造成本，更能夠以塑膠材質上的特性，在 該些滾珠C通過該各導引件32時吸收該些滾珠c滾動的振 動以及噪音。 • 以上所述實施例之揭示係用以說明本發明，並非用以限 制本發明’故舉凡數值之變化與等效元件之置換，仍應隸屬 本發明之範疇。 9 1322240 【圖式簡單說明】 第1圖習用迴流裝置的示意圖。 第2圖習用另一迴流裝置的示意圖。 第3圖本發明實施例與滾珠螺桿配合的示意圖。 第4圖本發明實施例組裝在滾珠螺桿的示意圖。 第5圖本發明實施例的分解圖。 第6圖本發明實施例端蓋與導引件組裝的示意圖。 【主要元件符號說明】 《習用》 螺帽A 循環通道A1 螺紋A2 迴流裝置10 端蓋11 輔助件12 通道13 迴流裝置20 端蓋21 凹槽211 輔助件22 10 1322240 凹槽221 定位件23 穿孔231 《本發明》 螺帽A 循環通道A1 螺紋A2 螺孔A3 螺桿B 螺紋B1 滾珠C 螺絲D 迴流裝置30 端蓋31 凹槽311 穿孔312 導引件32 迴流道321▲ two reflow devices 30 are respectively assembled at the axial ends of the nut A, and the reflow devices 30, as shown in Figures 5 and 6, include an end cap 31 and a guide member 32' 31 is annular and is manufactured by metal milling. The end cover 31 is formed with four grooves 3 ιι on the side corresponding to the nut a. The surface is axially opened with four through holes 312 for the screws D to pass through. The through hole 312 is locked into the screw hole A3 of the cap A, so that the end cap 31 is disposed at the end of the nut a. The guide members 32 are manufactured by plastic injection molding, and the guide members 32 are formed. The guides are respectively disposed in the recesses 311 of the end cap 31, and the guides are formed into a return passage 321 which is connected to the threads A2 and B1 of the nut 8 and the screw B and the screw. The circulation channel A1 of the cap a. Hey. The Xuan ball C rolls in the "Xuan ball screw cup, and when the nut a2, B1 of the nut a and the screw β are rolled to the reflow device 30 at one end, it will pass through the return passage 321 ' of one of the guide members 32. The balls c are guided into the circulation passage Α1 of the nut ,. After the balls C pass through the circulation passage μ, the 8 1322240 - passes through the return passage 321 of one of the guide members 32 of the other end reflow device 30. And • enter the °A screw s A and screw B thread A2, μ continue to roll, in order to achieve the effect of the far ball C cycle recirculation; in this embodiment, the reflow device 3 is provided with four guides 32. In order to enable the edge reflow device 30 to engage the nut A having the majority of the circulation passage A1, the number of the guide members 32 is not limited. As described above, the ball screw with the reflow device is similar to the prior art, and the end cap 31 only needs to be formed with the groove 311 for the guide members 32, so that no additional channel is required. It is relatively simple to manufacture and can be simplified. The engineering and working hours of the end cap 31 can reduce the manufacturing cost of the end cap 31; in addition, the guiding members 32 are externally disposed on the end cap 31. Therefore, it can be manufactured by plastic injection molding, which can not only reduce the manufacturing cost of the guide members 32, but also absorb the characteristics when the balls C pass through the guide members 32 by the characteristics of the plastic material. Ball c rolling vibration and noise. The above description of the embodiments is intended to be illustrative of the present invention and is not intended to limit the scope of the present invention. 9 1322240 [Simple description of the drawing] Fig. 1 is a schematic diagram of a conventional reflow device. Figure 2 is a schematic view of another reflow device. Fig. 3 is a schematic view showing the cooperation of the embodiment of the invention with a ball screw. Figure 4 is a schematic view of the embodiment of the invention assembled in a ball screw. Figure 5 is an exploded view of an embodiment of the invention. Figure 6 is a schematic view showing the assembly of the end cap and the guide member in the embodiment of the present invention. [Main component symbol description] "Use" Nut A circulation channel A1 Thread A2 Reflow device 10 End cover 11 Auxiliary member 12 Channel 13 Reflow device 20 End cover 21 Groove 211 Auxiliary member 22 10 1322240 Groove 221 Positioning member 23 Perforation 231 <<Invention> Nut A circulation passage A1 Thread A2 screw hole A3 screw B thread B1 ball C screw D reflow device 30 end cover 31 groove 311 perforation 312 guide 32 return passage 321