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公开(公告)号：EP1177966B1
公开(公告)日：2009-01-28
申请号：EP01118710.1
申请日：2001-08-03
申请人： NSK LTD.
CPC分类号： B21D43/285 , B21C37/155 , B21D35/006 , B21D53/88 , B21K1/12 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T29/49462 , Y10T29/49467 , Y10T29/49474 , Y10T29/49906 , Y10T74/1967
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公开(公告)号：EP1215102A3
公开(公告)日：2003-05-21
申请号：EP01129365.1
申请日：2001-12-17
申请人： NSK Ltd.,
CPC分类号： F16H55/26 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T74/1967
摘要： The object of the invention is to provide a rack shaft having two rack teeth groups (A2,B2) and hollowed throughout the whole body, to lightweightize the shaft and to reduce the cost. The two rack teeth groups (A2,B2) are located longitudinally apart from each other and have phase difference related to an angle around the axis of the shaft. After the two rack teeth groups (A2,B2) are formed simultaneously or sequentially by die forming on the flat bottoms of the workpiece beforehand gutter-shaped, the legs of the gutter-shaped workpiece are bent to butt to each other and, thereby, a tubular body of the shaft is given to the workpiece. The centers of the material are offset beforehand corresponding to the phase difference.
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公开(公告)号：EP1132277A3
公开(公告)日：2007-05-23
申请号：EP01105385.7
申请日：2001-03-09
申请人： NSK LTD.
CPC分类号： B21K1/767 , B21C37/155 , B21K1/063 , B62D3/126 , Y10S72/702 , Y10T29/49467 , Y10T29/49474 , Y10T29/49476 , Y10T74/1967 , Y10T74/19949
摘要： A hollow rack shaft is manufactured through a first step, a second step and a third step. At the first step, the plate-like workpiece of substantial rectangular shape is press formed into a gutter-like shape. The first die set used at this step is provided with slant die surfaces for canceling elastic recovering generated at the workpiece when the workpiece is removed from the first die set. At the second step, a row of rack teeth is press-formed on the flat bottom portion of the workpiece formed in the first step. The die set used at the second step is provided with a recess for releasing surplus workpiece material within the die clearance at a stroke end of the pressworking. At the third step, each of a pair of legs of the workpiece is bent in a semi-circular shape so as to be butted to each other. At this time, a mandrel is inserted between the legs of the workpiece.
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公开(公告)号：EP1145934A3
公开(公告)日：2005-04-13
申请号：EP01109331.7
申请日：2001-04-12
申请人： NSK Ltd.,
CPC分类号： F16H55/26 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T74/1967 , Y10T74/19949
摘要： A hollow rack shaft (1) is produced by forming a plate work piece and has continuous metal flow along the contour of rack teeth surface without being cut. A series of wave-like concave-convex sections is formed on the inner surface of the shaft. Thickness of tooth body and tooth bottom of the rack teeth is adjusted by dimensions of the unevenness (ue). Thereby, stress concentration at each point of the rack shaft is prevented and the shaft is strengthend and lightweightized. Rack may be made of two halves, at least the one with the teeth having a gutter-shape.
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6.发明公开Hollow rack shaft and manufacturing method thereof 有权Hohle Zahnstange und ihr Herstellungsverfahren
公开(公告)号：EP1215102A2
公开(公告)日：2002-06-19
申请号：EP01129365.1
申请日：2001-12-17
申请人： NSK Ltd.,
CPC分类号： F16H55/26 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T74/1967
摘要： The object of the invention is to provide a rack shaft having two rack teeth groups (A2,B2) and hollowed throughout the whole body, to lightweightize the shaft and to reduce the cost. The two rack teeth groups (A2,B2) are located longitudinally apart from each other and have phase difference related to an angle around the axis of the shaft. After the two rack teeth groups (A2,B2) are formed simultaneously or sequentially by die forming on the flat bottoms of the workpiece beforehand gutter-shaped, the legs of the gutter-shaped workpiece are bent to butt to each other and, thereby, a tubular body of the shaft is given to the workpiece. The centers of the material are offset beforehand corresponding to the phase difference.
摘要翻译： 本发明的目的是提供一种具有两个齿条齿组（A2，B2）的齿条轴，并且在整个机身中空化，以使轴轻量化并降低成本。 两个齿条齿组（A2，B2）彼此纵向分开，并且具有与轴的轴线周围的角度相关的相位差。 在两个齿条齿组（A2，B2）之间通过模具成型同时或顺序地形成在工件的平坦底部上，预先形成沟槽状，沟槽状工件的腿部彼此弯曲，从而， 轴的管状体被给予工件。 材料的中心预先相对于相位差偏移。
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公开(公告)号：EP1123855B1
公开(公告)日：2006-11-08
申请号：EP01102772.9
申请日：2001-02-08
申请人： NSK Ltd.
CPC分类号： B62D3/126 , B21D15/04 , B21K1/767 , B21K1/768 , Y10T29/49474 , Y10T74/19949
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公开(公告)号：EP1177966A3
公开(公告)日：2006-04-12
申请号：EP01118710.1
申请日：2001-08-03
申请人： NSK LTD.
CPC分类号： B21D43/285 , B21C37/155 , B21D35/006 , B21D53/88 , B21K1/12 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T29/49462 , Y10T29/49467 , Y10T29/49474 , Y10T29/49906 , Y10T74/1967
摘要： A workpiece (1) for a hollow rack shaft is a substantially rectangular plate. The opposite two sides of this workpiece are respectively provided with a complementary profile composed of the continuation of a convex portion and a concave portion and when the workpiece is cylindrically formed, the profiles are mutually engaged. As the width (w1) of a part the width of which is the largest in the convex portion is larger than that of a part the width (w2) of which is the smallest in the concave portion, the two sides are prevented from being detached after engagement. Further, the opposite convex portion and concave portion are mutually caulked and hereby, mutual gap is removed.
摘要翻译： 用于中空齿条轴的工件（1）是大致矩形的板。 该工件的相对的两侧分别设置有由凸部和凹部的延续构成的互补轮廓，并且当工件被圆柱形地形成时，轮廓相互接合。 由于凸部的宽度最大的部分的宽度（w1）大于凹部宽度（w2）最小的部分的宽度（w1），所以防止两侧脱离 参与后。 此外，相对的凸部和凹部相互铆接，因此相互间隙被去除。
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9.发明公开Hollow rack shaft and method of manufacturing the same 有权Hohle Zahnstange und ihr Herstellungsverfahren
公开(公告)号：EP1123855A3
公开(公告)日：2005-02-02
申请号：EP01102772.9
申请日：2001-02-08
申请人： NSK Ltd.,
CPC分类号： B62D3/126 , B21D15/04 , B21K1/767 , B21K1/768 , Y10T29/49474 , Y10T74/19949
摘要： According to a method of manufacturing a hollow rack shaft, an approximately rectangular plate having a wide rack tooth portion is bent lengthwise. At this time, the plate has, at the central portion, a flat bottom portion on which rack teeth are formed later and a pair of mutually facing leg portions, and, in the vicinity of both ends, a semicircular bottom portion and a pair of mutually facing leg portions. The mutually facing leg portions at the central portion are bent into a gutter-like cross section having a larger clearance than the clearance of the mutually facing leg portions in the vicinity of both ends. The rack teeth are thus formed on the flat bottom portion through the plastic flow of the flat bottom portion and a part of material of the pair of leg portions of this flat bottom portion. The plate on which the rack teeth have been formed is formed into a tube having a hollow inner surface, by bending the plate and butt-joining the edge portions.
摘要翻译： 根据制造中空齿条轴的方法，具有宽齿条齿部的近似矩形的板被纵向弯曲。 此时，板在中央部具有稍后形成齿条齿的平坦的底部和一对相互相对的脚部，并且在两端附近具有半圆形的底部和一对 相互面对的腿部。 在中央部分的相互相对的腿部弯曲成具有比两端附近相互面对的腿部的间隙大的间隙的沟槽状横截面。 因此，齿条齿通过平底部的塑性流动和平底部的一对腿部的一部分材料形成在平底部上。 已经形成有齿条齿的板形成为具有中空的内表面的管，通过弯曲板和对接边缘部分。
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公开(公告)号：EP1145934A2
公开(公告)日：2001-10-17
申请号：EP01109331.7
申请日：2001-04-12
申请人： NSK Ltd.,
CPC分类号： F16H55/26 , B21K1/767 , B21K1/768 , B62D3/126 , Y10T74/1967 , Y10T74/19949
摘要： A hollow rack shaft is produced by forming a plate work piece and has continuous metal flow along the contour of rack teeth surface without being cut. A series of wave-like concave-convex sections is formed on the inner surface of the shaft. Thickness of tooth body and tooth bottom of the rack teeth is adjusted by dimensions of the unevenness. Thereby, stress concentration at each point of the rack shaft is prevented and the shaft is strengthend and lightweightized.
摘要翻译： 通过形成板状工件制造中空的齿条轴（1），并且沿着齿条齿表面的轮廓连续地进行金属流动而不被切割。 在轴的内表面上形成有一系列波状的凹凸部。 牙齿的齿体和牙齿底部的厚度根据不平坦度（ue）的尺寸进行调整。 由此，防止了齿条轴的各点处的应力集中，并且轴被加强和轻量化。 齿条可以由两半制成，至少有一个具有沟槽形状的齿。
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