TWI388745B - Roller screw - Google Patents
Roller screw Download PDFInfo
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- TWI388745B TWI388745B TW95109747A TW95109747A TWI388745B TW I388745 B TWI388745 B TW I388745B TW 95109747 A TW95109747 A TW 95109747A TW 95109747 A TW95109747 A TW 95109747A TW I388745 B TWI388745 B TW I388745B
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- roller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
- F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Description
本發明係關於在螺旋軸(screw shaft，螺桿)和螺帽(nut)之間夾有可滾動滾子的滾子螺桿(roller screw，滾注螺桿或滾筒螺桿)。The present invention relates to a roller screw (roller screw or roller screw) in which a rollable roller is sandwiched between a screw shaft and a nut.
在螺旋軸和螺帽之間介存有可滾動之滾珠(ball)的滾珠螺桿其係比滑動接觸之螺桿，因為相對於螺帽其使螺旋軸迴轉時之摩擦係數減少，因此，已被實際應用在工具機．機器人之定位機構、進給機構或汽車之轉向齒輪(steering gear)等。A ball screw in which a ball can be rolled between a screw shaft and a nut is a screw that is in sliding contact with the screw, because the friction coefficient of the screw shaft is reduced relative to the nut, and thus has been actually Applied in machine tools. The positioning mechanism of the robot, the feed mechanism, or the steering gear of the automobile.
近年來為了使容許載荷增大，取代當作轉動體之滾珠而使用滾子之滾子螺桿，例如被提案有專利文獻1之滾子螺桿。此一滾子螺桿係在螺旋軸的外周面形成滾子滾道溝，在螺帽之內周面也形成面對於螺旋軸的滾子滾道溝之螺旋狀的滾子滾道溝，而在螺旋軸之滾子滾道溝和螺帽的滾子滾道溝之間的負荷滾子滾道路上，排列有當作轉動體之複數個滾子。又，其在螺帽上設有形成接續至負荷滾道路之一端及另一端的無負荷滾子回程通路之循環構件，而自負荷滾道路之一端撈起在負荷滾子滾道路上滾動之滾子並再送回至另一端，藉此，而可使負荷滾道路滾動之滾子循環。In recent years, in order to increase the allowable load, a roller screw using a roller instead of a ball as a rotor is used. For example, a roller screw of Patent Document 1 is proposed. The roller screw forms a roller track groove on the outer circumferential surface of the screw shaft, and a spiral roller groove groove that faces the roller groove groove of the screw shaft is formed on the inner circumferential surface of the nut, and On the load roller rolling path between the roller groove groove of the screw shaft and the roller track groove of the nut, a plurality of rollers serving as a rotating body are arranged. Moreover, the nut is provided with a circulating member forming a no-load roller return path which is connected to one end and the other end of the load rolling road, and the one end of the self-loading rolling road is rolled up on the rolling road of the load roller. The child is then sent back to the other end, whereby the roller rolling the load rolling road can be cycled.
(專利文獻1)日本專利特開平11－210858號公報(Patent Document 1) Japanese Patent Laid-Open No. Hei 11-210858
在負荷滾子滾道路，滾子在其側面一邊接受載荷，一邊在螺旋軸的滾子滾道溝及螺帽之滾子滾道溝上滾動。滾球雖然在任何方向均可滾動，但滾子之移動方向則被限定於僅一方向，在負荷滾子滾道路中，滾子之姿勢則被限定。因此，要使自負荷滾子滾道路撈起之滾子再送回負荷滾道路時，必須對準負荷滾子滾道路所即定之滾子的姿勢而送回，亦即，必須使側面形狀為四角形的滾子之姿勢和剖面四角形的負荷滾子滾道路之形狀一致。為了對應使此姿勢一致送回的必要性，習知者係藉將循環構件之無負荷滾子回程通路扭曲，而滾子沿著無負荷滾子回程通路移動而徐徐地使滾子的姿勢變化，最後再使滾子的姿勢和負荷滾子滾道路之剖面形狀成為一致。In a load roller rolling road, the roller receives a load on one side of the roller, and rolls on the roller rolling groove of the screw shaft and the roller rolling groove of the nut. Although the ball can roll in any direction, the direction of movement of the roller is limited to only one direction. In the roller road of the load roller, the posture of the roller is limited. Therefore, in order to return the roller picked up by the self-loading roller to the load rolling road, it must be returned in accordance with the posture of the roller which is determined by the load roller rolling road, that is, the side shape must be square. The shape of the roller is the same as the shape of the quadrilateral load roller rolling road. In order to cope with the necessity of returning this posture consistently, the conventional person twists the unloaded roller return path of the circulation member, and the roller moves along the unloaded roller return path to slowly change the posture of the roller. Finally, the posture of the roller and the cross-sectional shape of the roller of the load roller are matched.
但是，將循環構件之無負荷滾子回程通路扭曲時，扭曲轉部分在無負荷滾子回程通路上移動之滾子其阻力則會增大，而變成有不能順利地移動滾子之虞。However, when the unloaded roller return path of the circulation member is twisted, the resistance of the roller that moves the twisted portion on the unloaded roller return path increases, and becomes a problem that the roller cannot be smoothly moved.
因此本發明之目的為提供一種即使不必扭曲接續在負荷滾子滾道路之無負荷滾子回程通路，亦可使滾子循環之滾子螺桿。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a roller screw that can circulate a roller even without having to distort the unloaded roller return path following the load roller rolling path.
以下說明本發明。又，為了容易理解本發明，雖然在附圖的元件符號中附加括號，但本發明並不限於圖示之形態。The invention is described below. Further, in order to facilitate the understanding of the present invention, the parentheses are attached to the component symbols of the drawings, but the present invention is not limited to the illustrated embodiments.
為了解決上述課題，申請專利範圍第1項之發明係關於一種滾子螺桿，其特徵為，其具備有：在外周面形成螺旋狀的滾子滾道溝(5)之螺旋軸(5)；及，在內周面形成和前述螺旋軸(5)的前述滾子滾道溝(5a)相對向之螺旋狀的滾子滾道溝(6a)之螺帽(6)；及，形成被接續至前述螺旋軸(5)的前述滾子滾道溝(5a)和前述螺帽(6)的前述滾子滾道溝(6a)之間的負荷滾子滾道路(9)之一端及另一端的無負荷滾子回程通路(10)之循環構件(12、13)；及，排列在前述負荷滾子滾道路(9)及前述無負荷滾子回程通路(10)之複數個滾子(7)；而自前述螺帽(6)的正面觀看時，前述無負荷滾子回程通路(10)之兩端部的一對方向轉換路(16)呈直線狀延伸，且前述一對方向轉換部(16)所成之角度實質上為90度。In order to solve the above problems, the invention of claim 1 relates to a roller screw characterized in that: a screw shaft (5) having a spiral roller groove groove (5) formed on an outer peripheral surface; And a nut (6) of a roller raceway groove (6a) which is formed to be spirally opposed to the roller runner groove (5a) of the screw shaft (5) on the inner circumferential surface; and is formed to be connected One end and the other end of the load roller rolling path (9) between the aforementioned roller rolling groove (5a) of the screw shaft (5) and the roller rolling groove (6a) of the nut (6) a circulating member (12, 13) of the unloaded roller return path (10); and a plurality of rollers arranged in the aforementioned load roller rolling path (9) and the aforementioned unloaded roller return path (10) (7) When viewed from the front surface of the nut (6), a pair of direction changing paths (16) at both end portions of the unloaded roller return path (10) linearly extend, and the pair of direction changing portions (16) The angle formed is substantially 90 degrees.
此處所謂實質上構成90度是因為在滾子(7)和無負荷滾子回程通路(10)之間稍微空有縫隙，因此，為考慮到即使一對方向轉換路(16)所形成角度稍有偏差時，不必扭曲無負荷滾子回程通路(10)亦可的情形者。Here, the fact that the structure is substantially 90 degrees is because there is a slight gap between the roller (7) and the unloaded roller return path (10), and therefore, in consideration of the angle formed by even the pair of direction changing paths (16) When there is a slight deviation, it is not necessary to distort the unloaded roller return path (10).
申請專利範圍第2項之發明係，除了申請專利範圍第1項的滾子螺桿外，其特徵為，前述無負荷滾子回程通路(10)係在其中央部具有和前述螺帽(6)的軸線平行直線狀延伸之直線通路(11)。The invention of claim 2, in addition to the roller screw of claim 1, is characterized in that the unloaded roller return path (10) has a nut (6) at a central portion thereof. The axis of the line extends linearly in a straight line (11).
申請專利範圍第3項之發明係，除了申請專利範圍第1或2項的滾子螺桿外，其特徵為，在前述無負荷滾子回程通路(10)，自前述滾子(7)之進行方向觀看之狀態時，為了使鄰接之滾子(7)的軸線互相正交，而十字狀排列前述複數個滾子(7)。The invention of claim 3, in addition to the roller screw of claim 1 or 2, is characterized in that the unloaded roller return path (10) is carried out from the aforementioned roller (7) In the state of the directional view, in order to make the axes of the adjacent rollers (7) orthogonal to each other, the plurality of rollers (7) are arranged in a cross shape.
申請專利範圍第4項之發明係，除了申請專利範圍第1至3項中任一項的滾子螺桿外，其特徵為，前述滾子(7)其直徑和長度的比大約為1：1，前述無負荷滾子回程通路(10)之剖面形狀為正方形。The invention of claim 4, in addition to the roller screw of any one of claims 1 to 3, is characterized in that the ratio of the diameter to the length of the roller (7) is approximately 1:1. The cross-sectional shape of the unloaded roller return path (10) is square.
此處，使直徑和長度的比構成大約1：1係，嚴格而言其長度被設定為比直徑稍小者。Here, the ratio of the diameter to the length is made to be about 1:1, and strictly speaking, the length is set to be slightly smaller than the diameter.
申請專利範圍第5項之發明係，除了申請專利範圍第1至4項中任一項的滾子螺桿外，其特徵為，被形成前述方向轉換路(16)的循環構件之一對方向轉換路構成部(13)，其被安裝在前述螺帽(6)之軸線方向的兩端面。The invention of claim 5, in addition to the roller screw of any one of claims 1 to 4, characterized in that one of the circulation members formed by the direction changing path (16) is converted in direction The path forming portion (13) is attached to both end faces of the nut (6) in the axial direction.
根據申請專利範圍第1項之發明，由於不必使循環構件的無負荷滾子回程通路扭曲即可使滾子循環，因此，滾子在無負荷滾子回程通路移動時，不會因為無負荷滾子回程通路之扭曲而發生有阻力。According to the invention of claim 1, the roller is circulated because it is not necessary to twist the unloaded roller return path of the circulation member, so that the roller does not roll because of the no-load roller return path. There is resistance to the distortion of the sub-return path.
根據申請專利範圍第2項之發明，其可得到可對應於螺旋軸之導程(lead)太大的情形，或負荷滾子滾道路之捲繞數過多情形的循環構件。According to the invention of claim 2, it is possible to obtain a circulation member which can correspond to a case where the lead of the screw shaft is too large, or a case where the number of windings of the roller roller is excessive.
如申請專利範圍第1項之發明而配置一對方向轉換路時，因經由無負荷滾子回程通路，而載荷有自螺旋軸之軸線的一方向(1)之負荷的滾子，在反轉之狀態(亦即，負載有和螺旋軸之軸線的前述一方向(1)相反方向(2)來的載荷之狀態)而回行至負荷滾子滾道路。根據申請專利第3項之發明，則由於滾子十字排列，因此，即使滾子反轉時亦可負荷自螺旋軸之軸線的一方向(1)及另一方向(2)來的載荷。When the pair of direction changing paths are arranged as in the invention of the first application of the patent scope, the roller having the load in one direction (1) from the axis of the screw shaft is reversed by the unloaded roller return path. The state (that is, the state in which the load is loaded in the opposite direction (2) from the one direction (1) of the axis of the screw shaft) is returned to the load roller rolling path. According to the invention of claim 3, since the rollers are arranged in a cross, the load in one direction (1) and the other direction (2) of the axis of the screw shaft can be loaded even when the rollers are reversed.
根據申請專利範圍第4項之發明，使用直徑和長度之比大約1：1的滾子，且使無負荷滾子回程通路之剖面形狀構成正方形，因此自螺帽的正面觀看，可設計成直線狀延伸之一對方向轉換路之形成角度為90度。According to the invention of claim 4, a roller having a diameter to length ratio of about 1:1 is used, and the cross-sectional shape of the unloaded roller return path is square, so that it can be designed as a straight line from the front of the nut. One of the extensions forms an angle of 90 degrees with respect to the direction change path.
根據申請專利範圍第5項之發明，可使自螺帽的正面觀看形成90度交差的方向轉換路之一對方向轉換路構成部安裝在螺帽。According to the invention of claim 5, one of the direction changing paths forming the 90-degree intersection from the front surface of the nut can be attached to the nut.
圖1表示本發明之一實施形態中的滾子螺桿之斜視圖。滾子螺桿(roller screw)係具有：在外周面形成螺旋狀之滾子滾道溝5a的螺旋軸5；及，在內周面形成面對於滾子滾道溝5a之螺旋狀的滾子滾道溝6a之螺帽6。在螺旋軸5之滾子滾道溝5a和螺帽6的滾子滾道溝6a之間的負荷滾子滾道路，在自滾子7的進行方向觀看之狀態，為了複數個滾子7所鄰接的滾子之軸線可互相正交其被十字排列。為了負荷螺旋軸5之軸線方向的一方向(1)及另一方向(2)之載荷(參照圖3)，則必須如此十字排列之滾子7。在本實施形態中，每間隔一軸線被正交地配置滾子7，而使軸線平行之滾子7的數目和軸線正交的滾子的數目之比成為1：1。在滾子7間夾有可防止滾子7彼此間接觸之護圈(retainer)8。Fig. 1 is a perspective view showing a roller screw in an embodiment of the present invention. The roller screw has a screw shaft 5 that forms a spiral roller groove groove 5a on the outer circumferential surface, and a spiral roller roller that forms a surface on the inner circumferential surface with respect to the roller track groove 5a. The nut 6 of the channel 6a. The load roller rolling path between the roller track groove 5a of the screw shaft 5 and the roller track groove 6a of the nut 6 is in a state of being viewed from the direction in which the roller 7 is viewed, for a plurality of rollers 7 The axes of adjacent rollers may be orthogonal to each other and arranged in a cross. In order to load the load in one direction (1) and the other direction (2) in the axial direction of the screw shaft 5 (see Fig. 3), the rollers 7 must be arranged in such a cross. In the present embodiment, the rollers 7 are arranged orthogonally with respect to one axis, and the ratio of the number of rollers 7 having parallel axes and the number of rollers orthogonal to the axis is 1:1. A retainer 8 that prevents the rollers 7 from contacting each other is interposed between the rollers 7.
當使螺帽6對螺旋軸5相對迴轉時，複數個滾子7會在滾子滾道溝5a和滾子滾道溝6a之間的負荷滾子滾道路9上滾動。滾子至負荷滾子滾道路9之一端的滾子7係經過無負荷滾子回程通路10後，而再回到數個捲繞在前面的負荷滾子滾道路9之另一端。When the nut 6 is relatively rotated about the screw shaft 5, a plurality of rollers 7 roll on the load roller rolling path 9 between the roller track groove 5a and the roller track groove 6a. The roller 7 of the roller to one end of the load roller rolling path 9 passes through the unloaded roller return path 10 and returns to the other end of the plurality of winding roller roads 9 wound on the front side.
圖2表示形成無負荷滾子回程通路10之循環構件12、13的斜視圖。無負荷滾子回程通路10係由：中央部之直線通路11；及，兩端部之方向轉換路16；如此所形成。直線通路11係和螺帽6的軸線平行直線狀延伸。方向轉換路16係曲線狀，例如呈圓弧狀延伸。2 is a perspective view showing the circulation members 12, 13 forming the unloaded roller return path 10. The unloaded roller return path 10 is composed of a linear path 11 at the center portion and a direction changing path 16 at both ends; The linear passage 11 and the axis of the nut 6 extend linearly in parallel. The direction change path 16 is curved, for example, in an arc shape.
在螺帽6，形成有和螺旋軸5的軸線平行延伸之貫通孔，在此貫通孔被***管狀的直線部12。在此直線部12內，形成具有直線軌道之剖面四角形狀的直線通路11。其詳細將在後面說明，而直線通路11不會被扭曲，即使滾子7在直線通路11移動而滾子7的姿勢也不會迴轉。The nut 6 is formed with a through hole extending in parallel with the axis of the screw shaft 5, and the through hole is inserted into the tubular straight portion 12. In the straight portion 12, a linear passage 11 having a rectangular cross section of a linear orbit is formed. The details will be described later, and the linear passage 11 is not twisted, and even if the roller 7 moves in the linear passage 11, the posture of the roller 7 does not rotate.
在螺帽6的軸線方向之兩端面，安裝有方向轉換路構成部13。在方向轉換路構成部13，具有圓弧狀之軌道，同時，形成有剖面四角形狀之方向轉換路16。方向轉換路構成部13係在方向轉換路16的四角形剖面之對角線位置被分割為二，即內周側13a和外周側13b。此等方向轉換路構成部13之內周側13a及外周側13b各別具有凸緣部。當使方向轉換路構成部13的內周側13a和外周側13b重疊而定位於螺帽6的端面，則可用螺栓等之固定手段使凸緣部固定於螺帽6的端面。由於直線部12之兩端嵌入在方向轉換路構成部13，因此，藉使方向轉換路構成部13固定於螺帽6時，則直線部12也被固定在螺帽6上。Directional switching path constituent portions 13 are attached to both end faces of the nut 6 in the axial direction. The direction changing path forming portion 13 has an arc-shaped track and a direction changing path 16 having a quadrangular cross section. The direction changing path configuration portion 13 is divided into two, that is, the inner circumferential side 13a and the outer circumferential side 13b, in the diagonal position of the quadrangular cross section of the direction changing path 16. The inner peripheral side 13a and the outer peripheral side 13b of the direction change path configuring portion 13 each have a flange portion. When the inner peripheral side 13a and the outer peripheral side 13b of the direction change path constituent portion 13 are overlapped and positioned on the end surface of the nut 6, the flange portion can be fixed to the end surface of the nut 6 by a fixing means such as a bolt. Since both ends of the straight portion 12 are fitted into the direction changing path forming portion 13, when the direction changing path forming portion 13 is fixed to the nut 6, the straight portion 12 is also fixed to the nut 6.
圖3表示滾子螺桿之側視圖。圖4表示圖3之IV－IV線箭視圖。在組合上述直線部12及方向轉換路構成部13之螺帽6的軸線方向之兩端面，為了除去異物，且為了防止自螺帽6的內部使潤滑劑漏出，其安裝有曲徑軸封(labyninth seal)14。又，在螺帽6之端面則安裝有可覆蓋曲徑軸封14之蓋子15。Figure 3 shows a side view of the roller screw. Fig. 4 is a view showing the arrow of the line IV-IV of Fig. 3. In order to remove foreign matter and to prevent leakage of lubricant from the inside of the nut 6 in the axial direction of both ends of the nut portion of the straight portion 12 and the direction changing path forming portion 13 , a labyrinth shaft seal is attached thereto ( Labyninth seal) 14. Further, a cover 15 covering the labyrinth shaft seal 14 is attached to the end surface of the nut 6.
圖5表示螺旋軸5。在螺旋軸5之外周形成具有既定導程(lead)之螺旋狀的滾子滾道溝5a。本實施形態係，為了增加容許負載，且為了使螺帽6的全長構成較短而將滾子滾道溝5a之條數設定為四條。滾子滾道溝5a也可設定為一條、二條或三條等。Figure 5 shows the screw shaft 5. A spiral roller groove groove 5a having a predetermined lead is formed on the outer circumference of the screw shaft 5. In the present embodiment, in order to increase the allowable load, the number of the roller race grooves 5a is set to four in order to make the overall length of the nut 6 short. The roller raceway groove 5a can also be set to one, two or three.
圖6表示螺旋軸5之滾子滾道溝5a的剖面形狀。滾子滾道溝5a的剖面係為V字形狀而其開口角度被設定為90度。在滾子滾道溝5a的底部，為了使90度之交差部分也可作研磨加工而形成有越程槽(grinding underout)之圓弧部5b。Fig. 6 shows the cross-sectional shape of the roller race groove 5a of the screw shaft 5. The roller race groove 5a has a V-shaped cross section and an opening angle of 90 degrees. At the bottom of the roller chute groove 5a, a circular arc portion 5b having a grinding underout is formed in order to make the intersecting portion of 90 degrees.
圖7表示螺帽6之詳細圖。圖7(A)表示螺帽6之前視圖，圖7(B)表示沿著軸線方向之剖面圖，圖7(C)表示螺帽6的內部圖，在螺帽6的內周面形成有面對螺旋軸5的滾子滾道溝5a之螺旋狀的滾子滾道溝6a。又，在螺帽6，形成有延伸至螺帽6的軸線方向之貫通孔17。貫通孔17其中央部17a被形成為小、徑，中央部的兩側之兩端部17a被形成為稍微比中央部17a更大徑。在貫通孔17的中央部17a被***有直線部12，在兩端部17b則被***方向轉換路構成部13。在螺帽6之端面，形成有螺帽6在安裝方向轉換路構成部13安裝用之安裝座18。直線部12及方向轉換路構成部13係被設成和滾子滾道溝6a具有同樣的條數(本實施形態為4條)，而各別使在四條滾子滾道溝6a滾動之滾子7循環。FIG. 7 shows a detailed view of the nut 6. Fig. 7(A) is a front view of the nut 6, Fig. 7(B) is a cross-sectional view taken along the axial direction, and Fig. 7(C) is an internal view of the nut 6, and a surface is formed on the inner peripheral surface of the nut 6. The spiral roller race groove 6a of the roller race groove 5a of the screw shaft 5. Further, the nut 6 is formed with a through hole 17 extending in the axial direction of the nut 6. The through hole 17 has a central portion 17a formed in a small diameter, and both end portions 17a on both sides of the central portion are formed to be slightly larger than the central portion 17a. The linear portion 12 is inserted into the central portion 17a of the through hole 17, and the direction changing path constituent portion 13 is inserted into the both end portions 17b. A mounting seat 18 for mounting the nut 6 in the mounting direction switching path forming portion 13 is formed on the end surface of the nut 6. The linear portion 12 and the direction changing path forming portion 13 are provided in the same number as the roller rolling groove 6a (four in the present embodiment), and each of them is rolled in the four roller rolling grooves 6a. Sub 7 loops.
圖8表示安裝座18之詳細圖。在安裝座18，形成有配合後述的方向轉換路構成部13之薄片部(23，參照圖15(A))形狀的圓弧形狀之平衡溝19。通常的端帽(end cap)方式之滾珠螺桿，其螺帽的端面被形成平坦狀，而未形成平衡溝19。又，在平坦的部分安裝有構成方向轉換路之構件。但是對滾子螺桿的情形則為了使滾子7可順利循環，其方向轉換路16之曲率半徑比滾珠螺桿有變成較大的傾向。方向轉換路16之曲率半徑變大時，方向轉換路構成部13則容易干涉螺帽6的滾子滾道溝6a。在方向轉換路構成部13形成有薄片部23，且在螺帽6之端面配合方向轉換路構成部13的薄片部23之形狀而形成平衡溝19時，即使方向轉換路16的曲率半徑比滾珠螺桿更大，也可防止方向轉換路構成部13會干涉到滾子滾道溝6a。FIG. 8 shows a detailed view of the mount 18. In the mount 18, an arcuate balance groove 19 having a shape of a sheet portion (23, see FIG. 15(A)) of a direction change path forming portion 13 to be described later is formed. In a conventional end cap type ball screw, the end faces of the nuts are formed flat, and the balance grooves 19 are not formed. Further, a member constituting the direction changing path is attached to the flat portion. However, in the case of the roller screw, in order to allow the roller 7 to smoothly circulate, the radius of curvature of the direction changing path 16 tends to be larger than that of the ball screw. When the radius of curvature of the direction change path 16 is increased, the direction change path configuring portion 13 easily interferes with the roller track groove 6a of the nut 6. When the sheet portion 23 is formed in the direction changing path forming portion 13 and the balance groove 19 is formed by fitting the shape of the sheet portion 23 of the direction changing path forming portion 13 to the end surface of the nut 6, the radius of curvature of the direction changing path 16 is larger than that of the ball. The larger the screw, the more the direction change path forming portion 13 can be prevented from interfering with the roller track groove 6a.
圖9表示螺帽6之滾子滾道溝6a的剖面形狀。滾子滾道溝6a的剖面係V字形狀而其開口角度被設定為90度。在滾子滾道溝6a之底部，為了90度之交叉部分也可研磨加工而形成有越程槽之圓弧部6b。Fig. 9 shows the cross-sectional shape of the roller race groove 6a of the nut 6. The cross section of the roller race groove 6a has a V shape and its opening angle is set to 90 degrees. At the bottom of the roller chute groove 6a, a circular arc portion 6b having an overrun groove can be formed for the 90-degree intersection portion.
圖10表示滾子7之側視圖。在負荷滾子滾道路9滾動之滾子7係以圓筒狀其直徑D和長度L大致相等(正確而言滾子7的直徑D比滾子7的長度L稍大)。因此，自側面觀看時滾子7的形狀接近正方形，直徑和長度的比大略為1：1。在本實施形態中，為配合滾子7的側面形狀而使負荷滾子滾道路9及無負荷滾子回程通路10的剖面形狀形成為正方形。Figure 10 shows a side view of the roller 7. The roller 7 that rolls on the load roller rolling path 9 has a cylindrical shape whose diameter D and length L are substantially equal (correctly, the diameter D of the roller 7 is slightly larger than the length L of the roller 7). Therefore, the shape of the roller 7 is close to a square when viewed from the side, and the ratio of the diameter to the length is roughly 1:1. In the present embodiment, the cross-sectional shape of the load roller rolling path 9 and the unloaded roller return path 10 is formed in a square shape in accordance with the side surface shape of the roller 7.
圖11表示被收容在負荷滾子滾道路9之滾子7。滾子7其側面在滾子滾道溝5a之壁面和面對於該壁面的螺帽之滾子滾道溝6a的壁面之間被壓縮而負荷載荷。因此，其僅能負載螺旋軸5的軸線方向之一方向的負荷。亦即，比起以1個滾珠而負荷螺旋軸之軸線方向的一方向(1)及和該一方向(1)相反對方向(2)之載荷，相對的1個滾子7則僅能負載螺旋軸5之軸線方向的一方向(1)或另一方向(2)之任一方向的載荷(圖11只有一方向(1)的載荷)。經由未被扭曲之無負荷滾子回程通路10時，負荷來自螺旋軸5之軸線一方向(1)之載荷的滾子7，則以反轉之狀態(亦即，以負荷有自和螺旋軸5之軸線一方向(1)的反對方向(2)之載荷)回復至負荷滾子滾道路9。將滾子7十字排列時，則即使滾子7反轉，也可負荷自螺旋軸5之軸線一方向(1)及另一方向(2)雙方的載荷。Fig. 11 shows the roller 7 housed in the load roller rolling path 9. The side surface of the roller 7 is compressed between the wall surface of the roller track groove 5a and the wall surface of the roller track groove 6a of the nut of the wall surface, and is loaded. Therefore, it can only load the load in one of the axial directions of the screw shaft 5. That is, the relative one roller 7 can only be loaded compared to the load in one direction (1) in the axial direction of the load screw shaft with one ball and the opposite direction (2) from the one direction (1). The load in either one direction (1) or the other direction (2) in the axial direction of the screw shaft 5 (the load in one direction (1) in Fig. 11). When the unloaded unloaded roller return path 10 is passed, the roller 7 that loads the load from the axis one direction (1) of the screw shaft 5 is in an inverted state (that is, the load has a self and a screw axis). The direction of the opposite direction (2) of the axis (1) in the direction of 5 is restored to the load roller rolling path 9. When the rollers 7 are arranged in a cross, even if the rollers 7 are reversed, the load in both the direction (1) and the other direction (2) of the axis of the screw shaft 5 can be loaded.
又，如本實施形態般之十字排列，則雖然可使負荷一方向(1)的載荷之滾子7數和負荷另一方向(2)之載荷的滾子7數構成相同，但在想變更兩方向之容許載荷時，亦可使負荷一方向(1)之載荷的滾子7數和負荷另一方向(2)的載荷之滾子7數構成不同數目。在此狀況下，經由無負荷滾子回程通路10時，則必須注意滾子7會反轉，而其所接受之載荷的方向也會改變之問題。Further, in the case of the cross arrangement as in the present embodiment, the number of rollers 7 of the load in one direction of load (1) and the number of rollers 7 of the load in the other direction (2) can be made the same, but they are intended to be changed. In the case of the allowable load in both directions, the number of rollers 7 of the load in the load direction (1) and the number of the rollers 7 of the load in the other direction (2) may be different. In this case, when passing through the no-load roller return path 10, it must be noted that the roller 7 will reverse and the direction of the received load will also change.
滾子7之直徑D係使用比螺旋軸5的滾子滾道溝5a之壁面和面對於該壁面的螺帽6之滾子滾道溝6a的壁面間之距離稍大的所謂加大型(oversize)者。因此，在負荷滾子滾道路9內滾子變成可彈性變形，而與其平衡的載荷則當作預壓載荷而存在於螺帽6的內部。由於滾子7在負荷滾子滾道路9內被十字排列，因此，自滾子7加在螺帽6的載荷則以鄰接之滾子7而互相作用在相反方向。The diameter D of the roller 7 is a so-called enlargement (oversize) which is slightly larger than the distance between the wall surface of the roller raceway 5a of the screw shaft 5 and the wall surface of the roller raceway groove 6a of the nut 6 of the wall surface. )By. Therefore, the roller becomes elastically deformable in the load roller rolling road 9, and the load balanced thereto exists as the preloading load in the inside of the nut 6. Since the rollers 7 are arranged in a cross in the load roller rolling path 9, the load applied from the rollers 7 to the nut 6 acts in the opposite direction by the adjacent rollers 7.
圖12表示在螺旋狀的負荷滾子滾道路9、圓弧狀的方向轉換路16及直線通路11上循環之滾子7的軌道之中心線。圖(A)表示在負荷滾子滾道路9移動之滾子7的軌道(自螺旋軸5的軸線方向觀看之狀態)，圖(B)表示在無限循環路全體循環之滾子7的軌道(自螺旋軸5的側方觀看之狀態)。在負荷滾子滾道路9之滾子7的軌道係由螺旋軸5的軸線方向觀看而其半徑成為RCD/2之圓形狀。在無負荷滾子回程通路10的直線通路11之滾子的軌道，其在螺旋軸5之軸線5c則成為平行的直線。在方向轉換路16之滾子7的軌道係成為曲率半徑R之圓弧。Fig. 12 shows the center line of the track of the roller 7 circulating on the spiral load roller rolling path 9, the circular direction changing path 16 and the linear path 11. (A) shows the trajectory of the roller 7 that moves on the load roller rolling path 9 (the state viewed from the axial direction of the screw shaft 5), and (B) shows the trajectory of the roller 7 that circulates in the entire infinite circulation path ( The state viewed from the side of the screw shaft 5). The track of the roller 7 of the load roller rolling path 9 is viewed from the axial direction of the screw shaft 5 and its radius is a circular shape of RCD/2. The track of the roller of the linear passage 11 of the unloaded roller return path 10 is a straight line on the axis 5c of the screw shaft 5. The track of the roller 7 in the direction changing path 16 is an arc of curvature radius R.
此等負荷滾子滾道路9、方向轉換路16及直線通路11的接頭，為連續至滾子7之軌道的接線方向，因此，此等的接頭可變成平順。具體而言，在負荷滾子滾道路9和方向轉換路16之接頭部分，方向轉換路16之接線方向當自螺旋軸5的軸線方向觀看之狀態時，和負荷滾子滾道路9之中心線的接線方向成為一致，且自螺旋軸5的側方觀看時，其和負荷滾子滾道路9之導程(lead)一致。又，在直線通路11和方向轉換路16之接頭部分，方向轉換路16之接線方向係和直線通路11的中心線之延伸方向成為一致。The joints of the load roller rolling path 9, the direction changing path 16, and the linear passage 11 are continuous to the wiring direction of the track of the roller 7, and therefore, the joints can be made smooth. Specifically, in the joint portion of the load roller rolling path 9 and the direction changing path 16, the wiring direction of the direction changing path 16 is in the state viewed from the axial direction of the screw shaft 5, and the center line of the load roller rolling path 9 The wiring direction is uniform, and when viewed from the side of the screw shaft 5, it coincides with the lead of the load roller rolling path 9. Further, in the joint portion between the linear passage 11 and the direction change path 16, the direction of the wiring of the direction change path 16 and the direction in which the center line of the linear passage 11 extends are aligned.
圖13表示安裝在螺帽6之一側端面的方向轉換路構成部13和安裝在另一側端面之方向轉換路構成部13的位置關係。如上述無負荷滾子回程通路10的直線通路11的中心線，係和螺旋軸5之軸線5c平行延伸。方向轉換路16的中心線則係，如圖13(A)所示，自螺帽6之正面觀看之狀態時，直線狀地在負荷滾子滾道路9之中心線的接線方向延伸。又，前面側的方向轉換路16之中心線和內側的方向轉換路16之中心線係以既定的開口角度90度而交叉。含有方向轉換路16之平面P1、P2(正確係為含有方向轉換路16的中心線之平面)，大致和螺旋軸5的軸線平行。FIG. 13 shows the positional relationship between the direction change path constituting portion 13 attached to one end surface of the nut 6 and the direction changing path constituting portion 13 attached to the other end surface. The center line of the linear passage 11 of the above-described unloaded roller return path 10 extends in parallel with the axis 5c of the screw shaft 5. The center line of the direction change path 16 is linearly extended in the wiring direction of the center line of the load roller rolling path 9 when viewed from the front side of the nut 6 as shown in Fig. 13(A). Further, the center line of the direction change path 16 on the front side and the center line of the direction change path 16 on the inner side intersect at a predetermined opening angle of 90 degrees. The planes P1, P2 including the direction changing path 16 (correctly the plane including the center line of the direction changing path 16) are substantially parallel to the axis of the helical axis 5.
當使用滾子直徑和滾子長度的比為大致1：1之滾子時，如圖13(A)所示，可使無負荷滾子回程通路10的直線通路11的剖面形狀構成正方形。因此，自螺帽的正面觀看，可使直線狀延伸之一對方向轉換路16之形成角度設定成90度。如此，則即使不扭轉循環構件之無負荷滾子回程通路10亦可使滾子循環。When a roller having a ratio of the roller diameter to the roller length of approximately 1:1 is used, as shown in Fig. 13(A), the cross-sectional shape of the linear passage 11 of the unloaded roller return path 10 can be made square. Therefore, the angle of formation of one of the linear extensions to the direction changing path 16 can be set to 90 degrees as viewed from the front of the nut. In this way, the roller can be circulated even without the unloaded roller return path 10 of the circulating member.
圖14及圖15表示方向轉換路構成部之內周側13a。此方向轉換路構成部之內周側13a係具有：形成曲率半徑R的方向轉換路之本體部21；及，安裝在螺帽6的端面之凸緣部22。在本體部21之一端，形成有可撈起進入至負荷滾子滾道路9內的滾子7之撈起部21a。本體部21之另一端則被嵌入在直線部12。內周側13a之撈起部21a係和外周側13b的撈起部共同在接線方向可撈起在螺旋狀的負荷滾子滾道路9滾動之滾子7。方向轉換路16使撈起後的滾子7方向轉換，並沿圓弧狀之方向轉換路16移動。此處，即使滾子7沿著方向轉換路16移動，滾子7的姿勢也不會旋轉。14 and 15 show the inner peripheral side 13a of the direction change path constituent portion. The inner peripheral side 13a of the direction changing path constituent portion has a main body portion 21 that forms a direction changing path of the radius of curvature R, and a flange portion 22 that is attached to the end surface of the nut 6. At one end of the main body portion 21, a scooping portion 21a that can pick up the roller 7 that has entered the load roller rolling path 9 is formed. The other end of the body portion 21 is embedded in the straight portion 12. The scooping portion 21a of the inner peripheral side 13a and the scooping portion of the outer peripheral side 13b can be picked up in the wiring direction to roll the roller 7 which rolls on the spiral load roller rolling path 9. The direction changing path 16 shifts the direction of the roller 7 after the lifting, and moves in the direction of the arc-shaped switching path 16. Here, even if the roller 7 moves along the direction changing path 16, the posture of the roller 7 does not rotate.
在方向轉換構件之內周側13a，其形成比安裝方向轉換路構成部13之螺帽6的端面更突出至螺帽側，且配合方向轉換路16之形狀彎曲成曲線狀的薄片部23。薄片部23的剖面形狀被形成為V字狀。此薄片部23被嵌入至形成在螺帽6的端面之離隙溝19(參照圖8)。The inner peripheral side 13a of the direction changing member is formed to protrude from the end surface of the nut 6 of the mounting direction changing path forming portion 13 to the nut side, and the shape of the direction changing path 16 is curved into a curved sheet portion 23. The cross-sectional shape of the sheet portion 23 is formed in a V shape. This sheet portion 23 is fitted into the relief groove 19 formed in the end surface of the nut 6 (refer to FIG. 8).
圖16及圖17表示方向轉換路構成部之外周側13b。此一方向轉換路構成部之外周側13b具有：形成曲率半徑R的方向轉換路16之本體部25；及，安裝在螺帽6的端面之凸緣部26。在本體部25之一端，形成有可撈起進入至負荷滾子滾道路9內的滾子之撈起部25a。本體部25之另一端則被嵌入在直線部12。外周側之撈起部25a係和內周側的撈起部21a共同在接線方向可撈起在螺旋狀的負荷滾子滾道路9上滾動之滾子7。方向轉換路16可使撈起後的滾子7方向轉換並沿圓弧狀之方向轉換路16移動。又，在此方向轉換路構成部之外周側13b，形成有配合螺旋軸5的滾子滾道溝5a之形狀的突出部27，由此而可確保撈起部25a的強度。方向轉換構成部13為金屬製或樹脂製均可。16 and 17 show the outer peripheral side 13b of the direction change path constituent portion. The outer peripheral side 13b of the one-direction switching path configuration portion has a main body portion 25 that forms a direction change path 16 having a radius of curvature R, and a flange portion 26 that is attached to an end surface of the nut 6. At one end of the main body portion 25, a scooping portion 25a that can pick up the roller that has entered the loaded roller rolling path 9 is formed. The other end of the body portion 25 is embedded in the straight portion 12. The scooping portion 25a on the outer peripheral side and the scooping portion 21a on the inner peripheral side can pick up the roller 7 that rolls on the spiral load roller rolling path 9 in the wiring direction. The direction changing path 16 can change the direction of the roller 7 after the lifting and move in the direction of the arc-shaped switching path 16. Further, the outer peripheral side 13b of the direction changing path forming portion is formed with a protruding portion 27 that matches the shape of the roller track groove 5a of the screw shaft 5, whereby the strength of the scooping portion 25a can be secured. The direction change constituting portion 13 may be made of metal or resin.
圖18表示直線部12之剖面圖。直線通路11未被扭轉，而滾子7在通過無負荷滾子回程通路10之直線通路11時，滾子7的姿勢也不會旋轉。又直線部12金屬製成或樹脂製均可。FIG. 18 is a cross-sectional view showing the straight portion 12. The linear passage 11 is not twisted, and when the roller 7 passes through the linear passage 11 of the unloaded roller return passage 10, the posture of the roller 7 does not rotate. Further, the linear portion 12 may be made of metal or resin.
圖19表示在直線通路11移動之滾子7的姿勢。由此圖19可得知即使在直線通路11移動，滾子7的角A1之位置亦不會變化，且滾子7的姿勢也不會旋轉。FIG. 19 shows the posture of the roller 7 that moves in the linear passage 11. As can be seen from Fig. 19, even if the linear passage 11 moves, the position of the angle A1 of the roller 7 does not change, and the posture of the roller 7 does not rotate.
圖20表示在本實施形態所使用之護圈(retainer)8的詳細圖。護圈8係為使鄰接之滾子的軸線維持直角而保持滾子之姿勢者。和考慮護圈8本身也會反轉，則可使用在圓環狀的負荷滾子滾道路9之內周側和外周側厚度不會變化之平坦的護圈8。Fig. 20 is a detailed view of a retainer 8 used in the present embodiment. The retainer 8 is a person who maintains the posture of the roller by maintaining the axis of the adjacent roller at a right angle. Further, in consideration of the fact that the retainer 8 itself is reversed, a flat retainer 8 whose thickness does not change on the inner circumferential side and the outer peripheral side of the annular load roller rolling path 9 can be used.
又，本發明並不限於上述實施形態，在不變更本發明之意旨範圍其也可以其他實施形態具體化。例如循環構件並不限於如本實施形態之端帽方式、而可以使用回流管(return pipe)方式等各種方式之循環構件。Further, the present invention is not limited to the above-described embodiments, and other embodiments may be embodied without departing from the scope of the invention. For example, the circulation member is not limited to the end cap method of the present embodiment, and various types of circulation members such as a return pipe method can be used.
本說明書係主張2005年3月23日申請之日本專利特願2005－083131號之優先權。該內容全部含在此處。The present specification claims priority from Japanese Patent Application No. 2005-083131, filed on March 23, 2005. This content is all included here.
5．．．螺旋軸5. . . Screw shaft
5a．．．螺旋軸之滾子滾道溝5a. . . Spiral shaft roller track groove
5b．．．圓弧部5b. . . Arc portion
5c．．．軸線5c. . . Axis
6．．．螺帽6. . . Nut
6a．．．螺帽之滾子滾道溝6a. . . Nut roller groove
7．．．滾子7. . . Roller
8．．．護圈8. . . Guard ring
9．．．負荷滾子滾道溝9. . . Load roller rolling groove
10．．．無負荷滾子回程通路10. . . No-load roller return path
11．．．直線通路11. . . Straight path
12．．．循環構件(直線部)12. . . Circulating member (straight line)
13．．．循環構件(方向轉換路構成部)13. . . Circulating member (direction change path constituent part)
13a．．．內周側13a. . . Inner circumference side
13b．．．外周側13b. . . Peripheral side
14．．．曲徑軸封14. . . Curved shaft seal
15．．．蓋子15. . . cover
16．．．方向轉換路16. . . Direction conversion road
17．．．貫通孔17. . . Through hole
17a．．．中央部17a. . . Central department
17b．．．兩端部17b. . . Both ends
18．．．安裝座18. . . Mount
19．．．離隙溝19. . . Gap
21、25．．．本體部21, 25. . . Body part
21a、25a．．．撈起部21a, 25a. . . Pick up
22、26．．．凸緣部22, 26. . . Flange
23．．．薄片部twenty three. . . Sheet portion
27．．．突出部27. . . Protruding
D．．．直徑D. . . diameter
L．．．長度L. . . length
P1、P2．．．平面P1, P2. . . flat
R．．．曲率半徑R. . . Radius of curvature
A1．．．滾子之角A1. . . Roller corner
圖1係本發明之一實施形態中的滾子螺桿之斜視圖。BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a roller screw in an embodiment of the present invention.
圖2係滾子螺桿之主要零件的分解斜視圖。Figure 2 is an exploded perspective view of the main parts of the roller screw.
圖3係全部零件後組裝之滾子螺桿的側視圖。Figure 3 is a side view of the roller screw assembled from all parts.
圖4係圖3之IV－IV線箭視圖。Figure 4 is an arrow view of line IV-IV of Figure 3.
圖5表示螺旋軸之側視圖。Figure 5 shows a side view of the screw shaft.
圖6表示螺旋軸之滾子滾道溝的溝直角剖面形狀之圖。Fig. 6 is a view showing a cross-sectional shape of a groove of a roller groove groove of a screw shaft.
圖7係螺帽6之詳細圖(圖中(A)表示螺帽之前視圖，圖中(B)表示沿著軸線方向之剖面圖，圖中(C)表示內部圖)。Fig. 7 is a detailed view of the nut 6 (Fig. (A) shows a front view of the nut, (B) shows a cross-sectional view along the axial direction, and (C) shows an internal view).
圖8中(A)係方向轉換路構成部之安裝座的詳細圖(圖中(B)係(A)之B－B線剖面圖)。(A) is a detailed view of the mount of the direction change path constituent portion in Fig. 8 (Fig. (B) is a cross-sectional view taken along line B-B of (A)).
圖9表示螺帽之滾子滾道溝的溝直角剖面形狀之圖。Fig. 9 is a view showing a cross-sectional shape of a groove of a roller chute groove of a nut.
圖10係滾子之側視圖。Figure 10 is a side view of the roller.
圖11表示負荷滾子滾道路內之滾子的剖面圖。Figure 11 is a cross-sectional view showing the roller in the roller of the load roller.
圖12(A)、(B)表示在螺旋狀之負荷滾子滾道路、圓弧狀的方向轉換路及直線通路上循環之滾子的軌道之中心線圖。12(A) and (B) are center-line diagrams showing the trajectories of the rollers circulating on the spiral load roller rolling road, the arc-shaped direction changing path, and the straight path.
圖13(A)、(B)表示安裝在螺帽之一側的端面之方向轉換路構成部及安裝在另一側的端面之方向轉換路構成部的位置關係圖。13(A) and 13(B) are diagrams showing the positional relationship of the direction changing path constituent portion of the end surface attached to one end side of the nut and the direction changing path forming portion of the end surface attached to the other side.
圖14表示方向轉換路構成部之內周側的圖(圖中(A)表示前視圖，圖中(B)表示側視圖)。Fig. 14 is a view showing the inner peripheral side of the direction changing path constituent portion (Fig. (A) shows a front view, and Fig. 4(B) shows a side view).
圖15表示方向轉換路構成部之內周側的圖(圖中(A)表示側視圖，圖中(B)表示內部圖)。Fig. 15 is a view showing the inner peripheral side of the direction changing path constituent portion (Fig. (A) shows a side view, and Fig. 5(B) shows an internal view).
圖16表示方向轉換路構成部之外周側的圖(圖中(A)表示前視圖，圖中(B)表示側視圖)。Fig. 16 is a view showing the outer peripheral side of the direction change path constituting portion ((A) in the figure shows a front view, and (B) shows a side view).
圖17表示方向轉換路構成部之外周側的圖(圖中(A)表示側視圖，圖中(B)表示前視圖)。Fig. 17 is a view showing the outer peripheral side of the direction changing path constituent portion (Fig. (A) shows a side view, and Fig. (B) shows a front view).
圖18係直線部之剖面圖。Figure 18 is a cross-sectional view of a straight portion.
圖19表示在直線通路移動之滾子的迴轉姿勢之圖。Fig. 19 is a view showing a turning posture of a roller that moves in a straight path.
圖20表示護圈之圖(圖中(A)表示前視圖，圖中(B)表示(A)之X－X線剖面圖，圖中(C)表示(A)之Y－Y線剖面圖)。Figure 20 is a view showing a retainer (Fig. (A) shows a front view, (B) shows a cross-sectional view taken along the line X-X of (A), and (C) shows a cross-sectional view of the Y-Y line of (A). ).
5c‧‧‧軸線5c‧‧‧ axis
9‧‧‧負荷滾子滾道溝9‧‧‧Load roller rolling groove
10‧‧‧無負荷滾子回程通路10‧‧‧Unloaded roller return path
11‧‧‧直線通路11‧‧‧Linear access
13‧‧‧循環構件(方向轉換路構成部)13‧‧‧Circular members (direction change path components)
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005083131 | 2005-03-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200702574A TW200702574A (en) | 2007-01-16 |
| TWI388745B true TWI388745B (en) | 2013-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW95109747A TWI388745B (en) | 2005-03-23 | 2006-03-22 | Roller screw |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4945438B2 (en) |
| TW (1) | TWI388745B (en) |
| WO (1) | WO2006100997A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1801458B1 (en) * | 2004-09-08 | 2012-11-07 | Thk Co., Ltd. | Roller screw |
| JP5042347B2 (en) * | 2010-09-06 | 2012-10-03 | Ｔｈｋ株式会社 | Rolling element screw device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2230238A5 (en) * | 1973-05-16 | 1974-12-13 | Tech Integrale | |
| JP4475442B2 (en) * | 2000-02-28 | 2010-06-09 | Ｔｈｋ株式会社 | Roller screw and roller arrangement method of roller screw |
-
2006
- 2006-03-16 WO PCT/JP2006/305216 patent/WO2006100997A1/en active Application Filing
- 2006-03-16 JP JP2007509225A patent/JP4945438B2/en active Active
- 2006-03-22 TW TW95109747A patent/TWI388745B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| TW200702574A (en) | 2007-01-16 |
| JP4945438B2 (en) | 2012-06-06 |
| WO2006100997A1 (en) | 2006-09-28 |
| JPWO2006100997A1 (en) | 2008-09-04 |
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