L354077 六、發明說明： 【發明所屬之技街領域】 本發明與主要包含螺桿與螺帽的傳動裝置有關，特別是 指一種滚珠螺桿。 【先前技術】 滚珠螺桿發展至今，由於擁有低摩擦與高精密的優點， 一直是各種產業在線性位移裝置上的首選，雖然滾珠螺桿的 技術在發展上已到達成熟的階段，但要如何讓滾珠螺桿的各 種性能或數值最佳化，還待多方面的研究與開發； 目前的滚珠螺桿，其中一種如第1圖所示的技術，是在 一螺帽A的兩端分別設置一迴流端蓋B，各該迴流端蓋B具 一迴流道B1，該螺帽A具一軸向成型的通道A1，各該迴流 端蓋B的迴流道B1與該螺帽A的通道A1連接，以一螺桿C 穿入該螺帽A内，且在該螺帽A的内螺紋A2與該螺桿C的 外螺紋C1間置入複數滚珠D，便能由各該迴流端蓋B的迴 流道B1及該螺帽A的通道A1讓等該滾珠D進行迴流； 此種滚珠螺桿的確是目前相當習知且通用的技術，但在 最佳化方面卻有不足之處，原因在於該螺帽A的通道A1是 沿該螺帽A的軸向成型，雖然是通過該螺帽A進行迴流最短 與最快的路徑，但要將等該滾珠D由該螺帽A的内螺紋A2 與該螺桿C的外螺紋C1迅速導入該螺帽A的通道A1内，各 3 該迥流端蓋β的迴流道B1必須具有报小的迴轉半徑，遂造 成等該滾珠D在通過該迴流道B1時，產生相#大的轉折， 讓等該滚珠D的滾動不順暢，甚至可朗過大的轉折，而使 袞珠D彳里擊該迴流端蓋Β，反而會對各該迴流端蓋β造 成知傷’假使嚴朗必須更換各該迴流端蓋Β的狀況，在滚 珠螺桿因維修而停用的時間内’將不知會對產能或工作造成 多大的延宕與影響； -根據效能最佳化的角度，便有人接著開發出如第2圖所 的技術’是在該螺帽Α開設-個斜向通道A3，該斜向通 ^ 3 ,、該螺帽A的軸向呈歪斜（歪斜，是指兩條線不論相 、"、否刀別向兩個不同的方向延伸），以該斜向通道A3 戈原先開一通道a卜_§_由該螺帽A的側面徑向裝設二 ° 元件E，一該迴流元件E的迴流道E1與該螺帽A的斜 D、I Λ3連接，以一該迴流元件e取代原先使用的二該迴 流端蓋β; 如此使等該滾珠D由該斜向通道Α3通過該螺帽a進行 迴桃，會增加等該滾珠D的滾動路徑，不過能使各該迴流元 件E的迴流道E1具有較大的迴轉半徑，而減少等該滾珠d 通過時的轉折’讓等該滾珠D的滾動更為順暢，如此的確能 解決别述滾珠螺桿中，滾珠在滾動過程中轉折過大的種種問 題不過此種滾珠螺桿卻帶來另一個問題，等該滾珠D是由 仏向進入各該迴流元件E的迴流道，因此等該滾珠D對 1354077 各該迴流元件E會產生徑向的碰撞與震動，由於各該迴流元 件E也是由徑向外露地設置在該螺帽A，因此二該迴流元件 E必須完全吸收等該滾珠D造成的碰撞與震動，遂產生相當 大且難以被吸收的噪音，而震動也同時影響了滾珠螺桿的精 度，在追求高標準與高精密的工作環境便無法使用，限制了 此類滾珠螺桿的適用地點，另外二該迴流元件E由該螺帽A 的側面徑向裝設的技術，還會造成該螺帽A外徑大幅增加， φ 使整體體積擴大的缺點； 前述可知，即使滾珠螺桿的技術已發展成熟，但在如何 使效能最佳化的部份仍是亟待開發，如前述第二種滚珠螺 桿，雖解決第一種滚珠螺桿的缺點，但也產生了另一方面的 問題，要如何同時解決前述的種種問題，以及讓滾珠螺桿的 效能最佳化，本創作人便以此為根據，開發出一種滾珠螺桿。 φ 【發明内容】 本發明目的在提供一種滾珠螺桿，是利用裝設在螺帽轴 向兩端的二迴流元件，導引在螺帽與螺桿間滚動的滾動件， 使滚動件通過成型於螺帽且與螺帽軸心呈歪斜的通道以進 行迴流，藉此減少噪音與震動，並讓滾動件的滾動更順暢。 為達前述目的，該滾珠螺桿包含一螺桿、一螺帽、二迴 流元件及複數滾動件，該螺桿外緣具有滾動溝，該螺帽内緣 5 1.354077 具滚動槽，該螺帽套在該螺桿外且該滚動槽與該滾動溝相對 組成一負荷流道，該螺帽又貫設有與軸心呈歪斜形態的通 道，二該迴流元件分別設置在該螺帽的兩端，且各該迴流元 件内具一迴流道，二該迴流元件的迴流道的一端分別與該螺 帽的通道的兩端連接，另一端與該負荷流道連接形成一循環 路徑，等該滾動件在該循環路徑内滚動； 藉由該螺帽的通道與該螺帽的軸心呈歪斜的設計，能增 φ 加等該滾動件通過各該迴流元件的迴流道的迴轉半徑，讓等 該滾動件的滾動更為順暢，且避免等該滚動件滚動的轉折過 大而撞擊各該迴流元件的問題，另外二該迴流元件設置在該 螺帽兩端的設計，更能讓等該滚動件通過各該迴流元件時產 生的噪音與震動分散到該螺帽，而減少噪音與震動。 【實施方式】 ^ 本發明滚珠螺桿的實施例如第3至6圖所示，包含： 一螺桿10，外緣具有滚動溝11 ; 一螺帽20，具一轴向成型的穿孔21及一軸心20A，該 螺帽20以該穿孔21套設在該螺桿10外，該螺帽20内緣具 有滾動槽22，該螺帽20的滾動槽22與該螺桿10的滾動溝 11相對組成一負荷流道30,該螺帽20兩端面分別設有一組 設槽23,二該組設槽23間設有貫穿該螺帽20的一通道24, 該通道24的延伸方向24A與該螺帽20的軸心20A呈歪斜形 6 1354077 態（如前所述，歪斜是指兩條線不論相交與否，分別向兩個 不同的方向延伸，更精確地說，是指其中一條線向另一條線 所在的平面進行投影後，呈相交的狀態，如第6圖所示，界 定出該螺帽20的軸心20A位在一平面20B上，該通道24 的延伸方向24A投影至該平面20B成為投影線24B，該投影 線24B與該軸心20A相交，即代表該通道24的延伸方向24A 與該轴心20A呈歪斜形態）； 二迴流元件40，分別轴向設置在該螺帽20的二該組設 槽23，各該迴流元件40如第7圖所示，内具一迴流道41， 二該迴流元件40的迴流道41的一端分別與該螺帽20的通 道24的兩端連接，二該迴流元件40的迴流道41的另一端 分別與該負荷流道30連接，使二該迴流元件40的迴流道 41、該螺帽20的通道24及該負荷流道30構成一循環路徑 50 ;以及 複數滚動件60，容納在該循環路徑50内進行滾動。 由前述可知，該螺帽20供等該滾動件60循環使用的通 道24是與該螺帽20的軸心20A呈歪斜，因此能增加等該滾 動件60通過各該迴流元件40的迴流道41的迴轉半徑，讓 等該滾動件60的滾動更為順暢，能解決前述先前技術的敘 述中，第一種滾珠螺桿因各該迴流端蓋B的迴流道B1的迴 轉半徑過小，造成轉折過大而使等該滚珠D滚動不順暢的缺 7 1354077 點，更能避免先前技術的第一種滾珠螺桿中，等該滚珠D 滾動的轉折過大而撞擊各該迴流端蓋B的問題； 而二該迴流元件40轴向設置在該螺帽20兩端組設槽 23内的設計，使等該滾動件60通過各該迴流元件40時產 生的噪音與震動分散到該螺帽20，能解決前述先前技術的 敘述中，第二種滚珠螺桿因各該迴流元件E由徑向外露地設 置在該螺帽A，造成等該滚珠D通過各該迴流元件E產生噪 φ 音與震動的問題，且二該迴流元件40由軸向設置在該螺帽 20的設計，還能解決先前技術的第二種滾珠螺桿由側面徑 向裝設二該迴流元件E，導致該螺帽A外徑增加的缺點； 可知本創的滾珠螺桿，確實能解決目前滚珠螺桿在最佳 化方面的問題，而能使整體品質得到更進一步的提升。 再者，該螺帽20的通道24内，還可設置一軟管25， • 該軟管25的材質為塑膠或PVC等具撓性的軟材，當等該滚 動件60通過該軟管25進行迴流，還能利用該軟管25材質 的特性吸收等該滾動件60產生的噪音與震動，達到更佳的 靜音效果。 1.354077 【圖式簡單說明】 第1圖 習知滾珠螺桿迴轉半徑過小的示意圖。 第2圖 習知滚珠螺桿徑向設置迴流元件的示意圖。 第3圖本發明實施例的立體圖。 第4圖本發明實施例螺帽與迴流元件的分解圖。 第5圖本發明實施例的剖視圖。 第6圖本發明實施例軸心與通道的延伸方向呈歪斜 的示意圖。 第7圖本發明實施例迴流元件的立體圖。 第8圖本發明實施例裝設軟管的剖視圖。 第9圖本發明實施例滾動件通過軟管的示意圖。 【主要元件符號說明】 《習知》 螺帽A 通道A1 内螺紋A2 斜向通道A3 迴流端蓋B 迴流道B1 螺桿C 外螺紋C1 滚珠D 迴流元件E 迴流道E1 《本發明》 9 1-354077L354077 VI. Description of the invention: [Technical street field to which the invention pertains] The present invention relates to a transmission device mainly comprising a screw and a nut, and more particularly to a ball screw. [Prior Art] Since the development of ball screw, it has always been the first choice for linear displacement devices in various industries due to its low friction and high precision. Although the technology of ball screw has reached a mature stage in development, how to make the ball The various performances or numerical values of the screw are optimized, and various research and development are still to be carried out. The current ball screw, one of which is shown in Fig. 1, is provided with a reflow end cap at each end of a nut A. B, each of the reflow end caps B has a return passage B1, the nut A has an axially formed passage A1, and the return passage B1 of each of the reflow end caps B is connected to the passage A1 of the nut A, with a screw C penetrates into the nut A, and a plurality of balls D are placed between the internal thread A2 of the nut A and the external thread C1 of the screw C, so that the return passage B1 of the reflow end cap B and the snail can be The passage A1 of the cap A allows the ball D to be recirculated; such a ball screw is indeed a well-known and versatile technique at present, but there are disadvantages in optimization because the passage A1 of the nut A is Formed along the axial direction of the nut A, although it is passed through The nut A performs the shortest and fastest recirculation path, but the ball D is quickly introduced into the passage A1 of the nut A from the internal thread A2 of the nut A and the external thread C1 of the screw C, respectively. The return passage B1 of the choke end cover β must have a small radius of gyration, so that when the ball D passes through the return passage B1, a large turn of the phase # is generated, so that the rolling of the ball D is not smooth, or even Long over the big turning, and the beaded D 彳 击 该 该 回流 回流 回流 回流 Β Β Β Β Β 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击 击During the time of maintenance and decommissioning, 'I will not know how much delay and impact on production capacity or work; - according to the performance optimization perspective, someone will continue to develop the technology as shown in Figure 2' is in the nut Α Open an oblique channel A3, the oblique direction is 3, and the axial direction of the nut A is skewed (skewed, which means that the two lines are not in phase, ", or the knife extends in two different directions) , the diagonal channel A3 is originally opened by a channel ab_§_ radially mounted by the side of the nut A ° element E, a return channel E1 of the reflow element E is connected to the oblique D, I Λ 3 of the nut A, and a reflow element e is replaced by a reflow element e; the ball D is The inclined channel Α3 is returned to the peach through the nut a, which increases the rolling path of the ball D, but the return path E1 of each of the reflow elements E can have a larger radius of gyration, and the ball d can be reduced. The turning point of the time makes the rolling of the ball D smoother, so that it can solve various problems that the ball is excessively turned during the rolling process, but the ball screw brings another problem, etc. D is the return path from the stern to the reflow elements E, so that the ball D can cause radial collision and vibration to each of the reflow elements E, since each reflow element E is also radially exposed. The nut A, therefore, the reflow element E must completely absorb the collision and vibration caused by the ball D, and the noise generated is relatively large and difficult to be absorbed, and the vibration also affects the accuracy of the ball screw, and pursues the high standard. It can not be used with high-precision working environment, which limits the applicable location of such a ball screw. In addition, the reflow element E is radially mounted by the side of the nut A, and the outer diameter of the nut A is greatly increased. Increasing, φ makes the overall volume expand. As mentioned above, even if the technology of the ball screw has matured, the part that optimizes the performance is still urgently to be developed, such as the aforementioned second ball screw, although the first solution is solved. The shortcomings of the ball screw, but also caused another problem, how to solve the above problems at the same time, and optimize the performance of the ball screw, the creator used this to develop a ball screw. φ [ SUMMARY OF THE INVENTION The object of the present invention is to provide a ball screw which uses a two reflow element mounted on both axial ends of a nut to guide a rolling member that rolls between a nut and a screw, so that the rolling member is formed by The nut and the nut axis are inclined to recirculate, thereby reducing noise and vibration and making the rolling of the rolling member smoother. For the above purpose, the ball screw comprises a screw, a nut, two reflow elements and a plurality of rolling elements, the outer edge of the screw has a rolling groove, and the inner edge 5 1.354077 of the nut has a rolling groove, and the nut is sleeved Outside the screw, the rolling groove and the rolling groove form a load flow channel, and the nut further has a channel which is inclined with the axis, and the reflow elements are respectively disposed at two ends of the nut, and each The return element has a return flow path, and one end of the return flow path of the return flow element is respectively connected to both ends of the passage of the nut, and the other end is connected with the load flow path to form a circulation path, and the rolling element is in the cycle. Scrolling in the path; by the design of the channel of the nut and the axis of the nut being skewed, the radius of gyration of the rolling element through the return passage of each of the reflow elements can be increased, so that the rolling element is waited for The rolling is smoother, and the problem that the turning of the rolling element is too large to hit each of the reflow elements is avoided, and the other two reflow elements are disposed at the two ends of the nut, so that the rolling elements can be passed through each The reflow element Noise and vibration students dispersed to the nut, while reducing noise and vibration. [Embodiment] The embodiment of the ball screw of the present invention, as shown in Figs. 3 to 6, comprises: a screw 10 having a rolling groove 11 at the outer edge; a nut 20 having an axially formed perforation 21 and an axis The core 20A, the nut 20 is sleeved outside the screw 10 by the through hole 21, and the inner edge of the nut 20 has a rolling groove 22, and the rolling groove 22 of the nut 20 forms a load opposite to the rolling groove 11 of the screw 10. The flow channel 30 is provided with a plurality of grooves 23 on both end faces of the nut 20, and a passage 24 extending through the nut 20 is disposed between the set of slots 23, and the extending direction 24A of the passage 24 and the nut 20 are The axis 20A is skewed 6 1354077 (as mentioned above, skew means that the two lines extend in two different directions, whether intersected or not, or more precisely, one of the lines to the other After the plane is projected, it is in an intersecting state. As shown in FIG. 6, the axis 20A of the nut 20 is defined on a plane 20B, and the extending direction 24A of the channel 24 is projected to the plane 20B to be a projection line. 24B, the projection line 24B intersects the axis 20A, that is, the extending direction 24A of the channel 24 and the axis 20 A is in a skewed form; the two reflow elements 40 are respectively axially disposed on the two sets of the slots 23 of the nut 20, and each of the reflow elements 40 has a return path 41 as shown in FIG. One end of the return passage 41 of the component 40 is respectively connected to both ends of the passage 24 of the nut 20, and the other end of the return passage 41 of the reflow element 40 is respectively connected to the load flow passage 30, so that the return flow element 40 is The return passage 41, the passage 24 of the nut 20, and the load flow passage 30 constitute a circulation path 50; and a plurality of rolling members 60 housed in the circulation path 50 for rolling. As can be seen from the foregoing, the passage 24 of the nut 20 for the circulation of the rolling member 60 is skewed with the axis 20A of the nut 20, so that the return passage 41 of the rolling member 60 through each of the reflow members 40 can be increased. The radius of gyration makes the rolling of the rolling member 60 smoother, and can solve the above-mentioned prior art description. In the first ball screw, the radius of gyration of the return passage B1 of each of the reflow end caps B is too small, resulting in an excessive turning. In order to prevent the ball D from rolling smoothly, the lack of 7 1354077 points can avoid the problem of the first ball screw of the prior art, such as the turning of the ball D rolling too large and hitting each of the return end caps B; The reflow element 40 is axially disposed in the groove 23 at both ends of the nut 20 so that the noise and vibration generated when the rolling member 60 passes through the reflow elements 40 are dispersed to the nut 20, thereby solving the foregoing In the description of the technology, the second type of ball screw is disposed on the nut A in a radial direction due to each of the reflow elements E, causing the problem that the ball D generates noise and vibration through each of the reflow elements E, and The return element 40 is axially The design of the nut 20 can also solve the disadvantage that the second type of ball screw of the prior art is provided with the reflow element E radially from the side, which causes an increase in the outer diameter of the nut A; It can solve the problem of optimization of the current ball screw, and the overall quality can be further improved. Furthermore, a hose 25 may be disposed in the passage 24 of the nut 20, and the hose 25 is made of a flexible soft material such as plastic or PVC, and the rolling member 60 is passed through the hose. When the reflow is performed, the noise and vibration generated by the rolling member 60 can be absorbed by the characteristics of the material of the hose 25 to achieve a better mute effect. 1.354077 [Simple description of the drawing] Fig. 1 Schematic diagram of the conventional ball screw radius of gyration is too small. Fig. 2 is a schematic view showing a radial setting of a reflow element of a ball screw. Figure 3 is a perspective view of an embodiment of the invention. Figure 4 is an exploded view of the nut and reflow element of the embodiment of the present invention. Figure 5 is a cross-sectional view of an embodiment of the invention. Fig. 6 is a schematic view showing the direction in which the axis and the channel extend in a skewed manner in the embodiment of the present invention. Figure 7 is a perspective view of a reflow element of an embodiment of the invention. Figure 8 is a cross-sectional view showing a hose for mounting an embodiment of the present invention. Figure 9 is a schematic view of a rolling member passing through a hose in accordance with an embodiment of the present invention. [Main component symbol description] "Knowledge" Nut A channel A1 internal thread A2 oblique channel A3 return end cover B return channel B1 screw C external thread C1 ball D reflow element E return channel E1 "Invention" 9 1-354077
螺桿ίο 螺帽20 平面20B 滾動槽22 通道24 軟管25 迴流元件40 循環路徑50 滚動溝11 轴心20A 穿孔21 組設槽23 延伸方向24A 負荷流道30 迴流道41 滾動件60Screw ίο Nut 20 Plane 20B Rolling groove 22 Channel 24 Hose 25 Reflow element 40 Circulation path 50 Rolling groove 11 Axis 20A Perforation 21 Set groove 23 Extension direction 24A Load flow path 30 Return path 41 Roller 60