TWI518264B - Ball screw with a coating circulation device - Google Patents
Ball screw with a coating circulation device Download PDFInfo
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- TWI518264B TWI518264B TW102131950A TW102131950A TWI518264B TW I518264 B TWI518264 B TW I518264B TW 102131950 A TW102131950 A TW 102131950A TW 102131950 A TW102131950 A TW 102131950A TW I518264 B TWI518264 B TW I518264B
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Description
本發明係與滾珠螺桿有關,特別是指一種具包覆式迴流裝置的滾珠螺桿。 The present invention relates to a ball screw, and more particularly to a ball screw having a coated reflow device.
參閱第1圖,顯示美國US4357838專利號的圖式,其主要係提供一種具迴流元件的滾珠螺桿,其迴流元件11是從螺帽的端面軸向安裝,並具有一用以銜接該螺桿外螺旋槽道和螺帽內螺旋槽道的迴流槽111,使螺桿及螺帽之間的滾珠藉由該迴流槽111的導引而能夠不斷循環,然而,由於該迴流元件11同時具有消除滾珠迴流時衝擊力的功能,且該迴流元件11的迴流槽111是呈開放式設計,因此,該迴流元件11安裝至螺帽後,雖然符合歐洲工業標準(DIN)所規範的螺帽外徑,但在實際使用上會造成滾珠螺桿運轉時的噪音問題與強度問題。 Referring to Fig. 1, there is shown a drawing of U.S. Patent No. 4,357,838, the entire disclosure of which is incorporated herein incorporated herein by reference in its entirety in its entirety in the the the the the the the the The groove and the return groove 111 of the spiral groove in the nut enable the ball between the screw and the nut to be continuously circulated by the guiding of the return groove 111, however, since the reflow element 11 simultaneously has the elimination of ball recirculation The function of the impact force, and the return groove 111 of the reflow element 11 is of an open design, therefore, after the reflow element 11 is mounted to the nut, although conforming to the outer diameter of the nut specified by European Industrial Standards (DIN), In actual use, it will cause noise problems and strength problems when the ball screw is running.
參閱第2圖,顯示美國US6561053專利號的圖式,其主要係提供一種具迴流元件的滾珠螺桿,雖然其將該迴流元件12採分段的設計方式,即由一內迴流塊121及一外迴流塊122所組成,使其迴流道123呈一包覆式結構型態,藉以解決滾珠螺桿運轉時的噪音問題與強度問題,然而,由於該迴流元件12的底面124與迴流道123的底緣線1231呈非平行而具有一夾角的形成,因此,此種結構設計必須配合外徑較大的螺帽,對於特殊規範的螺帽並不適用,例如歐洲工業標準(DIN)所規範的螺帽外徑,因此適用性並不 足。 Referring to Fig. 2, there is shown a drawing of U.S. Patent No. 6,656,053, which is mainly to provide a ball screw having a reflow element, although the reflow element 12 is designed in a segmented manner, that is, by an inner reflow block 121 and an outer portion. The reflow block 122 is composed of a returning structure 123 in a covered structure to solve the problem of noise and strength during the operation of the ball screw. However, since the bottom surface 124 of the reflow element 12 and the bottom edge of the return passage 123 The wire 1231 is non-parallel and has an angled formation. Therefore, the structural design must be matched with a nut having a large outer diameter, which is not suitable for a special specification nut, such as a nut specified by the European Industrial Standard (DIN). Outer diameter, so the applicability is not foot.
是以,如何開發出一種具迴流元件的滾珠螺桿,其可同時解決上述缺陷即為本發明研發的動機。 Therefore, how to develop a ball screw with a reflow element, which can simultaneously solve the above defects is the motive for the development of the invention.
本發明之目的在於提供一種具包覆式迴流裝置的滾珠螺桿,其除了解決滾珠螺桿運轉時的噪音問題與強度問題之外,更得以適用在外徑較小的螺帽,以提升該迴流裝置的適用性。 It is an object of the present invention to provide a ball screw with a coated reflow device which, in addition to solving the noise problem and strength problem when the ball screw is in operation, is more suitable for a nut having a smaller outer diameter to enhance the reflow device. applicability.
緣是,為了達成前述目的,依據本發明所提供之一種具包覆式迴流裝置的滾珠螺桿,包含:一螺桿,具有一軸線以及一繞該軸線螺旋設置於外部的外螺旋槽道;一螺帽,沿該軸線方向套設於該螺桿,並包含一繞該軸線螺旋設置於內部的內螺旋槽道,且該內螺旋槽道與外螺旋槽道形成一容置多數滾珠的負荷路徑、及一由該螺帽端面沿該軸線方向開設的容置槽;一迴流裝置,沿該軸線方向設於該容置槽,並具有一第一側端、一相對於該第一側端的第二側端、一設於該第一、二側端之間的第一側面、一設於該第一、二側端之間且相對於該第一側面的第二側面、及一迴流道,其中該迴流道具有一設於該第一側端的第一迴流孔、一設於該第二側面的第二迴流孔、及一連接該第一迴流孔與第二迴流孔的底緣線,該第一端面的輪廓至少包含依序相接的一第一弧段、一第一切線、一第二弧段、一第二切線、及一第三弧段,該第一弧段係與該第二迴流孔相切並具有一第一曲率中心,該第一切線為該第一、二弧段的外公切線,該第二弧段具有一第二曲率中心,該第二切線為該第二、三弧段的外公切線並與該迴流道的底緣線呈平行,該第三弧段具有一第三曲率中心,且該第三曲率中心到該底緣線的垂直距離等於該第二曲率中心到該底緣線的垂直距離。 In order to achieve the foregoing object, a ball screw with a coated reflow device according to the present invention includes: a screw having an axis and an outer spiral channel spirally disposed around the axis; a cap is sleeved on the screw along the axis direction, and includes an inner spiral channel spirally disposed inside the axis, and the inner spiral channel and the outer spiral channel form a load path for accommodating a plurality of balls, and a receiving groove formed by the end surface of the nut along the axial direction; a reflow device disposed in the receiving groove along the axis direction, and having a first side end and a second side opposite to the first side end a first side disposed between the first and second side ends, a second side disposed between the first and second side ends and opposite to the first side, and a return channel, wherein the The reflow prop has a first return hole disposed at the first side end, a second return hole disposed on the second side, and a bottom edge line connecting the first return hole and the second return hole, the first end face The contour includes at least a first arc that is sequentially connected a first tangent line, a second arc segment, a second tangent line, and a third arc segment, the first arc segment being tangent to the second return hole and having a first center of curvature, the first cut The line is an outer common tangent of the first and second arc segments, the second arc segment has a second center of curvature, and the second tangent line is an outer common tangent of the second and third arc segments and is opposite to a bottom edge line of the return path Parallel, the third arc segment has a third center of curvature, and a vertical distance from the third center of curvature to the bottom edge line is equal to a vertical distance from the second center of curvature to the bottom edge line.
較佳地,該第一端面的輪廓更包含依序相接的一第三切線及一 第四弧段,該第三切線相接於該第三、四弧段之間,且為該第三、四弧段的外公切線,該第四弧段具有一第四曲率中心,且該第四曲率中心到該底緣線的垂直距離等於該第一曲率中心到該底緣線的垂直距離。 Preferably, the contour of the first end surface further includes a third tangent line and a a fourth arc segment, the third tangent line is connected between the third and fourth arc segments, and is an outer common tangent of the third and fourth arc segments, the fourth arc segment has a fourth center of curvature, and the The vertical distance from the center of the four curvatures to the bottom edge line is equal to the vertical distance from the center of the first curvature to the bottom edge line.
較佳地,該第一弧段曲率半徑大於該第二迴流孔的半徑。 Preferably, the first arc segment has a radius of curvature greater than a radius of the second return hole.
較佳地,該第二切線與該迴流道的底緣線之間的垂直距離小於該迴流道之第二迴流孔的直徑。 Preferably, the vertical distance between the second tangent line and the bottom edge line of the return channel is smaller than the diameter of the second return hole of the return channel.
較佳地,該迴流裝置係沿平行該軸線方向分成一第一迴流塊與一第二迴流塊。 Preferably, the reflow device is divided into a first reflow block and a second reflow block along the direction parallel to the axis.
較佳地,該迴流裝置係沿垂直該軸線方向分成一第一迴流塊與一第二迴流塊。 Preferably, the reflow device is divided into a first reflow block and a second reflow block along the direction perpendicular to the axis.
有關本發明為達成上述目的,所採用之技術、手段及其他之功效,茲舉1較佳可行實施例並配合圖式詳細說明如後。 The preferred embodiments of the present invention are set forth with reference to the accompanying drawings in detail.
11‧‧‧迴流元件 11‧‧‧Reflux components
111‧‧‧迴流槽 111‧‧‧Reflow tank
12‧‧‧迴流元件 12‧‧‧Reflux components
121‧‧‧內迴流塊 121‧‧‧Return block
122‧‧‧外迴流塊 122‧‧‧External reflow block
123‧‧‧迴流道 123‧‧‧Return
1231‧‧‧底緣線 1231‧‧‧ bottom line
20‧‧‧螺桿 20‧‧‧ screw
21‧‧‧軸線 21‧‧‧ axis
22‧‧‧外螺旋槽道 22‧‧‧External spiral channel
30‧‧‧螺帽 30‧‧‧ Nuts
31‧‧‧內螺旋槽道 31‧‧‧inner spiral channel
32‧‧‧容置槽 32‧‧‧ accommodating slots
40‧‧‧迴流裝置 40‧‧‧Reflow device
40A、40C‧‧‧第一迴流塊 40A, 40C‧‧‧ first reflow block
40B、40D‧‧‧第二迴流塊 40B, 40D‧‧‧ second reflow block
41‧‧‧第一側端 41‧‧‧First side
42‧‧‧第二側端 42‧‧‧ second side
43‧‧‧第一側面 43‧‧‧ first side
431‧‧‧第一弧段 431‧‧‧First arc
431C‧‧‧第一曲率中心 431C‧‧‧First Curvature Center
431R‧‧‧曲率半徑 431R‧‧‧ radius of curvature
432‧‧‧第一切線 432‧‧‧first tangent
433‧‧‧第二弧段 433‧‧‧second arc
433C‧‧‧第二曲率中心 433C‧‧‧Second Curvature Center
434‧‧‧第二切線 434‧‧‧second tangent
435‧‧‧第三弧段 435‧‧‧ third arc
435C‧‧‧第三曲率中心 435C‧‧ Third Center of Curvature
436‧‧‧第三切線 436‧‧‧ third tangent
437‧‧‧第四弧段 437‧‧‧fourth arc
437C‧‧‧第四曲率中心 437C‧‧‧ Fourth Curvature Center
44‧‧‧第二側面 44‧‧‧ second side
45‧‧‧迴流道 45‧‧‧Return
451‧‧‧第一迴流孔 451‧‧‧First return hole
452‧‧‧第二迴流孔 452‧‧‧second return hole
452R‧‧‧半徑 452R‧‧‧ Radius
452D‧‧‧直徑 452D‧‧‧diameter
453‧‧‧底緣線 453‧‧‧ bottom line
H1、H2、H3、H4、H5‧‧‧距離 H1, H2, H3, H4, H5‧‧‧ distance
91‧‧‧滾珠 91‧‧‧ balls
第1圖係US4357838號專利前案的一圖式。 Figure 1 is a drawing of the prior patent of U.S. Patent 4,357,838.
第2圖係US6561053號專利前案的一圖式。 Figure 2 is a drawing of the prior patent of US6561053.
第3圖係本發明的立體圖,顯示螺帽局部剖面的狀態。 Fig. 3 is a perspective view of the present invention showing a state in which the nut is partially cross-sectional.
第4圖係本發明的立體圖,顯示迴流裝置的立體狀態。 Figure 4 is a perspective view of the present invention showing the three-dimensional state of the reflow device.
第5圖係本發明的上視圖,顯示迴流裝置的上視狀態。 Figure 5 is a top view of the present invention showing the top view of the reflow device.
第6圖係本發明的側視圖,顯示迴流裝置的側視狀態。 Figure 6 is a side elevational view of the present invention showing the side view of the reflow device.
第7圖係本發明的立體分解圖,顯示迴流裝置呈上下分離的狀態。 Fig. 7 is a perspective exploded view of the present invention, showing a state in which the reflux device is vertically separated.
第8圖係本發明的立體分解圖,顯示迴流裝置呈左右分離的狀態。 Fig. 8 is a perspective exploded view of the present invention, showing a state in which the reflux device is separated left and right.
參閱第3至6圖所示,本發明實施例所提供的一種具包覆式迴 流裝置的滾珠螺桿,其主係由一螺桿20、一螺帽30、及一迴流裝置40所組成,其中:該螺桿20,具有一軸線21以及一繞該軸線21螺旋設置於外部的外螺旋槽道22。 Referring to Figures 3 to 6, a covered back is provided in an embodiment of the present invention. The ball screw of the flow device is mainly composed of a screw 20, a nut 30, and a reflow device 40, wherein the screw 20 has an axis 21 and an outer spiral spirally disposed outside the axis 21 Channel 22.
該螺帽30,沿該軸線21方向套設於該螺桿20,並包含一繞該軸線21螺旋設置於內部的內螺旋槽道31,且該內螺旋槽道31與外螺旋槽道22形成一容置多數滾珠91的負荷路徑、及一由該螺帽30端面沿該軸線21方向開設的容置槽32。 The nut 30 is sleeved on the screw 20 in the direction of the axis 21, and includes an inner spiral channel 31 spirally disposed inside the axis 21, and the inner spiral channel 31 and the outer spiral channel 22 form a A load path for accommodating a plurality of balls 91 and a receiving groove 32 opened in the direction of the axis 21 by the end surface of the nut 30.
由於該螺桿20、螺帽30、以及該迴流裝置40的組裝方式皆為習知,且其作動方式與習知相同,亦非本發明之創作重點,因此對於該等構件(指該螺桿20、螺帽30)及組裝方式之詳細結構與作動方式不再詳述。 Since the screw 20, the nut 30, and the reflow device 40 are assembled in a conventional manner, and the operation manner thereof is the same as the prior art, and is not the focus of the present invention, therefore, for the components (refer to the screw 20, The detailed structure and actuation mode of the nut 30) and the assembly method are not described in detail.
本發明特別創作之處在於:該迴流裝置40,沿該軸線21方向設於該容置槽32,並具有一第一側端41、一相對於該第一側端41的第二側端42、一設於該第一、二側端41、42之間的第一側面43、一設於該第一、二側端41、42之間且相對於該第一側面43的第二側面44、及一迴流道45;其中該迴流道45具有一設於該第一側端41的第一迴流孔451、一設於該第二側面44的第二迴流孔452、及一連接該第一迴流孔451與第二迴流孔452的底緣線453;須說明的是,以6圖為方向定義的基礎而言,該底緣線453是指位於該迴流道45最低處的迴流道壁面;該第一端面43的輪廓至少包含依序相接的一第一弧段431、一第一切線432、一第二弧段433、一第二切線434、及一第三弧段435;該第一弧段431係與該第二迴流孔452相切並具有一第一曲率中心431C,且該第一弧段431曲率半徑431R大於該第二迴流孔452的半徑452R;該第一切線432為該 第一、二弧段431、433的外公切線;該第二弧段433具有一第二曲率中心433C;該第二切線434為該第二、三弧段433、435的外公切線並與該迴流道45的底緣線453呈平行,且該第二切線434與該迴流道45的底緣線453之間的垂直距離H1小於該迴流道45之第二迴流孔452的直徑452D;該第三弧段435具有一第三曲率中心435C,且該第三曲率中心435C到該底緣線453的垂直距離H2等於該第二曲率中心433C到該底緣線453的垂直距離H3;本實施例中,該第一端面43的輪廓更包含依序相接的一第三切線436及一第四弧段437,該第三切線436相接於該第三、四弧段435、437之間,且為該第三、四弧段435、437的外公切線,該第四弧段437具有一第四曲率中心437C,且該第四曲率中心437C到該底緣線453的垂直距離H4等於該第一曲率中心431C到該底緣線453的垂直距離H5;另外,配合參閱第7圖所示,該迴流裝置40係沿平行該軸線21方向分成一第一迴流塊40A與一第二迴流塊40B;當然亦可配合參閱第8圖所示,該迴流裝置40係沿垂直該軸線21方向分成一第一迴流塊40C與一第二迴流塊40D。 The present invention is particularly useful in that the reflow device 40 is disposed in the accommodating groove 32 along the axis 21 and has a first side end 41 and a second side end 42 opposite to the first side end 41. a first side surface 43 disposed between the first and second side ends 41, 42 and a second side surface 44 disposed between the first and second side ends 41, 42 and opposite to the first side surface 43 And a return passage 45; wherein the return passage 45 has a first return hole 451 disposed at the first side end 41, a second return hole 452 disposed on the second side 44, and a first connection The bottom edge line 453 of the return hole 451 and the second return hole 452; it should be noted that, based on the definition of the direction of FIG. 6, the bottom edge line 453 refers to the wall surface of the return channel located at the lowest point of the return channel 45; The contour of the first end surface 43 includes at least a first arc segment 431, a first tangent line 432, a second arc segment 433, a second tangent line 434, and a third arc segment 435; The first arc segment 431 is tangent to the second return hole 452 and has a first center of curvature 431C, and the first arc segment 431 has a radius of curvature 431R greater than a half of the second return hole 452. 452R; 432 for the first tangent An outer common tangent of the first and second arc segments 431, 433; the second arc segment 433 has a second center of curvature 433C; the second tangent line 434 is an outer common tangent to the second and third arc segments 433, 435 and the reflow The bottom edge line 453 of the track 45 is parallel, and the vertical distance H1 between the second tangent line 434 and the bottom edge line 453 of the return channel 45 is smaller than the diameter 452D of the second return hole 452 of the return channel 45; The arc segment 435 has a third center of curvature 435C, and the vertical distance H2 of the third center of curvature 435C to the bottom edge line 453 is equal to the vertical distance H3 of the second center of curvature 433C to the bottom edge line 453; in this embodiment The contour of the first end surface 43 further includes a third tangent line 436 and a fourth arc segment 437 which are sequentially connected, and the third tangent line 436 is connected between the third and fourth arc segments 435 and 437, and For the tangential tangent of the third and fourth arc segments 435, 437, the fourth arc segment 437 has a fourth center of curvature 437C, and the vertical distance H4 of the fourth center of curvature 437C to the bottom edge line 453 is equal to the first The vertical distance H5 of the curvature center 431C to the bottom edge line 453; in addition, as shown in FIG. 7, the reflow device 40 is Parallel to the direction of the axis 21 is divided into a first reflow block 40A and a second reflow block 40B; of course, as shown in FIG. 8, the reflow device 40 is divided into a first reflow block 40C along the direction perpendicular to the axis 21 and A second reflow block 40D.
以上所述即為本發明實施例各主要構件之結構及其組態說明。至於本發明的作動方式及功效作以下說明。 The above description is the structure and configuration description of each main component of the embodiment of the present invention. The mode of operation and efficacy of the present invention are described below.
其一、本發明可以解決滾珠螺桿運轉時的噪音問題與強度問題。 First, the present invention can solve the problem of noise and strength during the operation of the ball screw.
由於本發明將該迴流道45設於該迴流裝置40內部,而具有一設於該迴流裝置40第一側端41的第一迴流孔451、一設於該迴流裝置40第二側面44的第二迴流孔452,因此,各滾珠91係通過一呈封閉狀的迴流道45而被包覆住,藉以解決滾珠螺桿運轉時的噪音問題與強度問題。 Since the return channel 45 is disposed inside the reflow device 40, the first return hole 451 disposed at the first side end 41 of the reflow device 40 and the second side 44 of the reflow device 40 are provided. Since the two return holes 452 are formed, the balls 91 are covered by a closed return passage 45, thereby solving the problem of noise and strength during the operation of the ball screw.
其二、本發明可適用在外徑較小的螺帽。 Second, the present invention is applicable to a nut having a small outer diameter.
由於本發明特別針對該迴流裝置40進行第一側面43的輪廓設計,即限定該第一弧段431係與該第二迴流孔452相切、該第一切線432為該 第一、二弧段431、433的外公切線;該第二弧段433具有一第二曲率中心433C、該第二切線434為該第二、三弧段434、435的外公切線並與該迴流道45的底緣線453呈平行、該第三弧段435的第三曲率中心435C到該底緣線453的垂直距離H2等於該第二曲率中心433C到該底緣線453的垂直距離H3等的限制,藉此,使得本發明得以適用在外徑較小的螺帽30,以符合新、舊形式的螺帽30,特別是指符合歐洲工業標準(DIN)所規範的螺帽30外徑。 Since the present invention specifically designs the first side surface 43 of the reflow device 40, that is, the first arc segment 431 is defined to be tangent to the second return hole 452, and the first tangent line 432 is The outer common tangent of the first and second arc segments 431, 433; the second arc segment 433 has a second center of curvature 433C, and the second tangent line 434 is the outer common tangent of the second and third arc segments 434, 435 and the return The bottom edge line 453 of the track 45 is parallel, the vertical distance H2 of the third curvature center 435C of the third arc segment 435 to the bottom edge line 453 is equal to the vertical distance H3 of the second curvature center 433C to the bottom edge line 453, and the like. The limitation, whereby the invention is applied to the nut 30 having a smaller outer diameter to conform to the new and old form of the nut 30, in particular to the outer diameter of the nut 30 in accordance with European Industrial Standards (DIN).
其次,除上述結構限定外,本發明特別進行該第二切線434與該迴流道45的底緣線453之間的垂直距離H1小於該迴流道45之第二迴流孔452的直徑452D之限定,俾使本發明更得以適用在外徑較小的螺帽30,以符合新、舊形式的螺帽30,特別是指符合歐洲工業標準(DIN)所規範的螺帽30外徑。 Secondly, in addition to the above-described structural limitation, the present invention particularly defines that the vertical distance H1 between the second tangent line 434 and the bottom edge line 453 of the return passage 45 is smaller than the diameter 452D of the second return hole 452 of the return passage 45. The invention is further applicable to the nut 30 having a smaller outer diameter to conform to the new and old form of the nut 30, and in particular to the outer diameter of the nut 30 in accordance with European Industrial Standards (DIN).
綜上所述,本發明所提供一種具包覆式迴流裝置的滾珠螺桿,除了解決滾珠螺桿運轉時的噪音問題與強度問題之外,更得以適用在外徑較小的螺帽,以提升該迴流裝置的適用性,而上述實施例及圖示僅為本發明之較佳實施例而已,當不能以之限定本發明實施之範圍,即大凡依本發明申請專利範圍所作之均等變化與修飾,皆應屬本發明專利涵蓋之範圍內。 In summary, the present invention provides a ball screw with a coated reflow device, which not only solves the noise problem and strength problem when the ball screw is in operation, but also applies to a nut having a small outer diameter to improve the reflow. The applicability of the device, and the above-mentioned embodiments and illustrations are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the patent application of the present invention are It should be within the scope of the patent of the present invention.
40‧‧‧迴流裝置 40‧‧‧Reflow device
431‧‧‧第一弧段 431‧‧‧First arc
431C‧‧‧第一曲率中心 431C‧‧‧First Curvature Center
431R‧‧‧曲率半徑 431R‧‧‧ radius of curvature
432‧‧‧第一切線 432‧‧‧first tangent
433‧‧‧第二弧段 433‧‧‧second arc
433C‧‧‧第二曲率中心 433C‧‧‧Second Curvature Center
434‧‧‧第二切線 434‧‧‧second tangent
435‧‧‧第三弧段 435‧‧‧ third arc
435C‧‧‧第三曲率中心 435C‧‧ Third Center of Curvature
436‧‧‧第三切線 436‧‧‧ third tangent
437‧‧‧第四弧段 437‧‧‧fourth arc
437C‧‧‧第四曲率中心 437C‧‧‧ Fourth Curvature Center
45‧‧‧迴流道 45‧‧‧Return
452‧‧‧第二迴流孔 452‧‧‧second return hole
452R‧‧‧半徑 452R‧‧‧ Radius
452D‧‧‧直徑 452D‧‧‧diameter
453‧‧‧底緣線 453‧‧‧ bottom line
H1、H2、H3、H4、H5‧‧‧距離 H1, H2, H3, H4, H5‧‧‧ distance
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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TW102131950A TWI518264B (en) | 2013-09-05 | 2013-09-05 | Ball screw with a coating circulation device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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TW102131950A TWI518264B (en) | 2013-09-05 | 2013-09-05 | Ball screw with a coating circulation device |
Publications (2)
Publication Number | Publication Date |
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TW201510391A TW201510391A (en) | 2015-03-16 |
TWI518264B true TWI518264B (en) | 2016-01-21 |
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Application Number | Title | Priority Date | Filing Date |
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TW102131950A TWI518264B (en) | 2013-09-05 | 2013-09-05 | Ball screw with a coating circulation device |
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TW (1) | TWI518264B (en) |
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CZ306885B6 (en) * | 2016-09-05 | 2017-08-23 | KSK Precise Motion, a.s. | A ball screw with axially inserted transfer bodies |
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