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公开(公告)号：EP3059460A4
公开(公告)日：2017-07-05
申请号：EP14853731
申请日：2014-10-14
摘要： A crankshaft includes: journals (J) that define a central axis of rotation; crank pins (P) that are eccentric with respect to the journals; and crank arms (A) for connecting the journals (J) and the crank pins (P), wherein each of the crank arms (A) or at least one of the crank arms (A) integrally includes a counterweight. The crank arms (A) have a recess (10) in a surface adjacent to a corresponding one of the journals (J), the recess (10) disposed inward of a peripheral region (11) along a periphery of the surface, the recess (10) disposed along the peripheral region (11). With this configuration, it is possible to provide a crankshaft which has reduced weight and increased torsional rigidity in combination with increased flexural rigidity.
摘要翻译： 曲轴包括：限定中心旋转轴线的轴颈（J） 曲柄销（P）相对于轴颈偏心; 和用于连接轴颈（J）和曲柄销（P）的曲柄臂（A），其中每个曲柄臂（A）或曲柄臂（A）中的至少一个曲柄臂整体包括配重。 曲柄臂（A）在与相应的一个轴颈（J）相邻的表面中具有凹槽（10），凹槽（10）沿着表面的周边设置在周边区域（11）的内部，凹槽 （10）沿着周边区域（11）设置。 通过该结构，能够提供重量减轻，扭转刚性提高并且弯曲刚性提高的曲轴。
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公开(公告)号：EP3171044A4
公开(公告)日：2017-12-27
申请号：EP15821879
申请日：2015-07-14
发明人： ISHIHARA KOICHIRO , YOSHINO KEN
CPC分类号： F16C3/08 , F16C2360/22 , F16F15/283
摘要： Each of Crank arms (A) of a crankshaft has an asymmetric shape with respect to a crank arm centerline (Ac) connecting an axis of the crank pin (P) to an axis of the journal (J), and each of the crank arms has a maximum flexural rigidity at a point of time when the load onto the crank pin due to the combustion pressure reaches a maximum. When each of the crank arms (A) is divided by the crank arm centerline (Ac) into a right arm portion (Ar) and a left arm portion (Af), in each section of each of the crank arms (A) on a plane perpendicular to the crank arm centerline (Ac) at a position outward of the axis of the crank pin (P), an area moment of inertia of one of the right and the left arm portions that is in a side that is subjected to the maximum load is greater than an area moment of inertia of the other arm portion that is in a side opposite to the side that is subjected to the maximum load, and in each section of each of the crank arms (A) on a plane perpendicular to the crank arm centerline at a position inward of the axis of the crank pin (P), the area moment of inertia of the arm portion that is in the side opposite to the side that is subjected to the maximum load is greater than the area moment of inertia of the arm portion that is in the side that is subjected to the maximum load. The crankshaft has an increased flexural rigidity and a reduced weight.
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公开(公告)号：EP3170576A4
公开(公告)日：2018-02-28
申请号：EP15821281
申请日：2015-07-09
发明人： TAMURA KENJI , OKUBO JUNICHI , ISHIHARA KOICHIRO , YOSHINO KEN , YABUNO KUNIHIRO , KUROKAWA HIROYUKI , YAMASHITA TOMOHISA , TAKAMOTO SHO
CPC分类号： B21K1/08 , B21J5/02 , B21J5/027 , F16C3/08 , F16C2220/46
摘要： A method for producing a forged crankshaft includes: a preforming step of forming a preformed blank (31) with no flash, the preformed blank including a shape of the crankshaft, wherein the crank arm have excess projecting portions (Aaa, Aba) at an outer peripheries of side portions of the crank arm (A) near the crank pin (P); a die forging step of forming a forged blank with flash (32) by pressing the preformed blank (31) with a pair of first dies; and a trimming step of removing the flash (32a) from the forged blank (32). In the die forging step, while a second die (20) is abutted against a journal (J)-side surface of the crank arm (A) and holds the surface, the excess projecting portions (Aaa, Aba) of the crank arm (A) are deformed by the first dies so as to increase the side portions (Aa, Ab) of the crank arm (A) in thickness. This allows for a simple and higher-yield production process of a forged crankshaft having reduced weight and sufficient stiffness.
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4.发明公开
公开(公告)号：EP3072607A4
公开(公告)日：2017-08-30
申请号：EP14863211
申请日：2014-11-20
发明人： TAMURA KENJI , OKUBO JUNICHI , ISHIHARA KOICHIRO , YOSHINO KEN , YABUNO KUNIHIRO , KUROKAWA HIROYUKI , YAMASHITA TOMOHISA , TAKAMOTO SHO
CPC分类号： B21K1/08 , B23P15/00 , B23P2700/07 , F16C3/08 , F16C2220/46
摘要： A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms (A) have excess projecting portions (Aaa, Aba) at outer peripheries of side portions (Aa, Ab) thereof near a crank pin (P), the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion bending step bends the excess projecting portions (Aaa, Aba) of the crank arms toward a journal (J)-side surface of the crank arm by pressing the crankshaft using a pair of first dies (10A, 10B), the crankshaft being obtained by removing the flash in the trimming step. With this method, it is possible to conveniently produce a forged crankshaft having reduced weight in combination with sufficient stiffness.
摘要翻译： 一种制造锻造曲轴的方法包括模锻步骤，修整步骤和过量突出部分弯曲步骤。 模锻步骤用闪光灯形成精加工锻造毛坯，精加工锻造毛坯包括曲轴形状，其中曲柄臂（A）在侧部（Aa，Ab）的外周具有多余的凸出部分（Aaa，Aba） 其靠近曲柄销（P），多余的突出部分从外周突出。 修边步骤从模锻步骤中形成的精锻坯料中去除毛边。 过量突出部分弯曲步骤通过使用一对第一模具（10A，10B）按压曲轴将曲柄臂的多余突出部分（Aaa，Aba）朝曲柄臂的轴颈（J）侧表面弯曲， 曲轴通过在修剪步骤中去除闪光而获得。 利用该方法，可以方便地制造具有减轻的重量和足够的刚度的锻造曲轴。
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5.发明公开
公开(公告)号：EP3072609A4
公开(公告)日：2017-08-23
申请号：EP14864537
申请日：2014-11-20
发明人： TAMURA KENJI , OKUBO JUNICHI , ISHIHARA KOICHIRO , YOSHINO KEN , YABUNO KUNIHIRO , KUROKAWA HIROYUKI , YAMASHITA TOMOHISA , TAKAMOTO SHO
CPC分类号： B21K1/08 , B21J5/025 , F16C3/08 , F16C2220/46
摘要： A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion crushing step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms (A) have excess projecting portions (Aaa, Aba) at outer peripheries of side portions (Aa, Ab) thereof near a crank pin (P), the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion crushing step crushes the excess projecting portions (Aaa, Aba) of the crank arms by pressing the crankshaft using a pair of first dies (10A, 10B), the crankshaft being obtained by removing the flash in the trimming step. With this method, it is possible to conveniently produce a forged crankshaft having reduced weight in combination with sufficient stiffness.
摘要翻译： 一种制造锻造曲轴的方法包括模锻步骤，修整步骤和过量突出部分挤压步骤。 模锻步骤用闪光灯形成精加工锻造毛坯，精加工锻造毛坯包括曲轴形状，其中曲柄臂（A）在侧部（Aa，Ab）的外周具有多余的凸出部分（Aaa，Aba） 其靠近曲柄销（P），多余的突出部分从外周突出。 修边步骤从模锻步骤中形成的精锻坯料中去除毛边。 通过使用一对第一模具（10A，10B）按压曲轴，过度突出部分破碎步骤破碎曲柄臂的多余突出部分（Aaa，Aba），曲轴通过在修剪步骤中除去毛边而获得。 利用该方法，可以方便地制造具有减轻的重量和足够的刚度的锻造曲轴。
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公开(公告)号：EP3171045A4
公开(公告)日：2018-05-23
申请号：EP15822047
申请日：2015-07-14
发明人： ISHIHARA KOICHIRO , YOSHINO KEN , YABUNO KUNIHIRO
摘要： A crankshaft includes journals (J) that define a central axis of rotation, crank pins (P) that are eccentric with respect to the journals (J), and crank arms (A) connecting the journals (J) and the crank pins (P). A load due to combustion pressure is applied to each of the crank pins (P) via a connecting rod in a direction from the axis of a piston pin to the axis of the crank pin (P). Each of the crank arms (A) includes a recess (10) in a surface adjacent to the journal (J), in a region inward of a peripheral region (11) along the edge of the surface. The recess (10) extends along the peripheral region (11), and is asymmetric with respect to a crank arm centerline (Ac) connecting the axis of the crank pin (P) to the axis of the journal (J). Each of the crank arms (A) has a maximum flexural rigidity at a point of time when the load onto the crank pin (P) due to the combustion pressure reaches a maximum. The crankshaft has a reduced weight and an increased torsional rigidity in combination with an increased flexural rigidity.
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公开(公告)号：EP3179116A4
公开(公告)日：2018-01-24
申请号：EP15829623
申请日：2015-08-06
IPC分类号： F16C3/06
摘要： A crankshaft includes journals (J) that define a central axis of rotation; crank pins (P) that are eccentric with respect to the journals (J); crank arms (A) connecting the journals (J) to the crank pins (P); and counterweights (W) integrated with the crank arms (A). Each of the crank arms (A) has recesses (10) in a surface adjacent to the crank pin (P). The recesses (10) are disposed inward of peripheral regions (11) in both sides along an edge of the surface, and are disposed along the peripheral regions (11). The crankshaft has a reduced weight, an increased torsional rigidity and an increased flexural rigidity.
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8.发明公开
公开(公告)号：EP3072608A4
公开(公告)日：2017-08-23
申请号：EP14864179
申请日：2014-11-19
发明人： TAMURA KENJI , OKUBO JUNICHI , ISHIHARA KOICHIRO , YOSHINO KEN , YABUNO KUNIHIRO , KUROKAWA HIROYUKI , YAMASHITA TOMOHISA , TAKAMOTO SHO
CPC分类号： B21K1/08 , B21J5/025 , B23P15/00 , B23P2700/07 , F16C3/08 , F16C2220/46
摘要： A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms (A) have excess projecting portions (Aaa, Aba) at outer peripheries of side portions (Aa, Ab) thereof near a crank pin (P), the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion bending step bends the excess projecting portions (Aaa, Aba) of the crank arms toward a journal (J)-side surface of the crank arm (A) by inserting a first die (10) having a U-shape from a direction of eccentricity of the crank pin (P) to the crankshaft obtained by removing the flash in the trimming step. With this method, it is possible to conveniently produce a forged crankshaft having reduced weight in combination with sufficient stiffness.
摘要翻译： 一种制造锻造曲轴的方法包括模锻步骤，修整步骤和过量突出部分弯曲步骤。 模锻步骤用闪光灯形成精加工锻造毛坯，精加工锻造毛坯包括曲轴形状，其中曲柄臂（A）在侧部（Aa，Ab）的外周具有多余的凸出部分（Aaa，Aba） 其靠近曲柄销（P），多余的突出部分从外周突出。 修边步骤从模锻步骤中形成的精锻坯料中去除毛边。 过量突出部分弯曲步骤通过将具有U形的第一模具（10）插入曲柄臂（A）的轴颈（J）侧表面而将曲柄臂的多余突出部分（Aaa，Aba）弯曲 在修整步骤中通过去除毛刺而获得的曲柄销（P）到曲轴的偏心方向。 利用该方法，可以方便地制造具有减轻的重量和足够的刚度的锻造曲轴。
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