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公开(公告)号：EP4095404A1
公开(公告)日：2022-11-30
申请号：EP22170001.6
申请日：2022-04-26
发明人： MIYAUCHI, Yuma , SUZUKI, Runa
摘要： An internal combustion engine is provided, which includes an engine body provided with a cylinder and a piston reciprocatably accommodated in the cylinder, a crankshaft that converts reciprocating movement of the piston into rotational movement, and a bearing member pivotally supporting the crankshaft via lubricating oil. The crankshaft includes a crank journal pivotally supported by the bearing member, and a counterweight extending radially outward from an axial end part of the crank journal. The crank journal has a recess formed in a part thereof corresponding to the extended position of the counterweight, the recess being depressed radially inwardly. The recess is deeper at the axial end part of the crank journal than an axial center part.
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公开(公告)号：EP3623651A1
公开(公告)日：2020-03-18
申请号：EP18194072.7
申请日：2018-09-12
发明人： Züger, Reto
IPC分类号： F16C3/08
摘要： Lager umfassend eine Lagerschale (2) und einen Lagerzapfen (1, 11, 12) mit einer Rotationsachse (X), wobei der Lagerzapfen (1, 11, 12) um die Rotationsachse (X) rotierbar in der Lagerschale (2) angeordnet ist. Der Lagerzapfen (1, 11, 12) ist besitz derart eine asymmetrische Schwächung (3) in Bezug auf seine Rotationsachse (X), dass der Lagerzapfen (1, 11, 12) durch Einwirkung einer in Richtung der Lagerschale (2) wirkenden äusseren Kraft (F) deformierbar ist, sodass eine effektive Kraftfläche zwischen der Lagerschale (2) und dem Lagerzapfen (1, 11, 12) über die Deformation des Lagerzapfens (1, 11, 12) vergrösserbar ist.
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公开(公告)号：EP3520925A1
公开(公告)日：2019-08-07
申请号：EP17855722.9
申请日：2017-09-13
发明人： OKUBO, Junichi , TAMURA, Kenji , YOSHIDA, Kunihiro , HWANG, Sam Soo , NAKANO, Ryusuke , HORI, Masao
摘要： Provided is a production method, including a first preforming process for obtaining a first preform from a billet, a second preforming process for obtaining a second preform from the first preform, a final preforming process for obtaining a final preform from the second preform, and a finish forging process for forming the final preform into a finishing dimension of the forged crankshaft by die forging. In the first preforming process, regions to be a pin and a journal are pressed respectively from a direction perpendicular to an axial direction of the billet, thus reducing cross sectional areas of each region and forming a plurality of flat parts. In the second preforming process, the first preform is pressed in the pressing direction, which is a direction perpendicular to decentering direction of a region to be a second pin. In the final preforming process, the second preform is pressed from a direction perpendicular to an axial direction of the second preform, and further a region to be a counterweight and a region to be a crank arm integrally including a counterweight are pressed in the axial direction of the second preform.
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公开(公告)号：EP3517230A1
公开(公告)日：2019-07-31
申请号：EP17852912.9
申请日：2017-09-13
发明人： OKUBO, Junichi , TAMURA, Kenji , YOSHIDA, Kunihiro , HWANG, Sam Soo , NAKANO, Ryusuke , HORI, Masao
摘要： Provided is a production method, including a first preforming process for obtaining a first preform from a billet, a second preforming process for obtaining a second preform from the first preform, a final preforming process for obtaining a final preform from the second preform, and a finish forging process for forming the final preform into a finishing dimension of the crankshaft by die forging. In the first preforming process, regions to be a pin and a journal are pressed respectively from a direction perpendicular to an axial direction of the billet, thus reducing cross sectional areas of each region and forming a plurality of flat parts. In the second preforming process, the first preform is pressed in the pressing direction, which is a width direction of the flat parts. In the final preforming process, the second preform is pressed from a direction perpendicular to an axial direction of the second preform, and further a region to be a counterweight and a region to be a crank arm integrally including a counterweight are pressed in the axial direction of the second preform.
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公开(公告)号：EP3231530B1
公开(公告)日：2019-02-06
申请号：EP15866476.3
申请日：2015-12-10
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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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7.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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公开(公告)号：EP3170576A1
公开(公告)日：2017-05-24
申请号：EP15821281.1
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.
摘要翻译： 一种锻造曲轴的制造方法，其特征在于，包括：预成型坯料（31），该预成型坯料（31）不形成毛边，该预成型坯料具有曲轴的形状，曲柄臂在外侧具有多余的凸部（Aaa，Aba） 所述曲柄臂（A）的靠近所述曲柄销（P）的侧部的外周; 模锻步骤，通过用一对第一模具挤压预成型坯料（31）来形成具有毛边（32）的锻造毛坯; 以及从锻造毛坯（32）上去除毛边（32a）的修整步骤。 在模锻步骤中，当第二模具（20）抵靠在曲柄臂（A）的轴颈（J）侧表面上并保持该表面时，曲柄臂的多余突出部分（Aaa，Aba） A）通过第一模具变形，以增加曲柄臂（A）的侧部（Aa，Ab）的厚度。 这允许锻造曲轴的简单和更高产量的生产工艺具有减轻的重量和足够的刚度。
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9.发明公开DEVICE FOR FORMING FINISH-FORGING BLANK FOR FORGED CRANKSHAFT OF INLINE-SIX ENGINE, AND METHOD FOR MANUFACTURING FORGED CRANKSHAFT OF INLINE-SIX ENGINE USING SAID DEVICE 审中-公开设备用于生产锻造系列六缸发动机和方法的空白锻造曲轴制备锻造的WAVE系列六缸发动机使用该装置治疗
公开(公告)号：EP3112047A1
公开(公告)日：2017-01-04
申请号：EP15755628.3
申请日：2015-02-20
发明人： OKUBO, Junichi , TAMURA, Kenji , YOSHIDA, Kunihiro
CPC分类号： B21K1/08 , B21J5/025 , F16C3/08 , F16C2220/46
摘要： In a forming apparatus, movable journal dies (10U, 10B) and stationary journal dies (9U, 9B) hold and retain rough journal portions (Ja) of a preform blank (4) therebetween, and movable crank pin dies (12) contact rough crank pin portions (Pa) thereof, and in this state, the movable journal dies (10U, 10B) and the movable crank pin dies (12) are moved axially toward the stationary journal dies (9U, 9b) and the movable crank pin dies (12) are moved in a direction perpendicular to an axial direction. With this, rough arm portions (Aa) are axially compressed to reduce their thickness to that of arms of a forged crankshaft, and the rough crank pin portions (Pa) are pressed in the direction perpendicular to the axial direction to increase an amount of eccentricity to that of the crank pins of the forged crankshaft.
摘要翻译： 一个预型件坯料（4）和可动曲柄销此（12）接触粗糙的以形成装置中，可动轴颈此（10U，10B）和静止的轴颈此有（9U，9B）之间的保持和保留粗糙轴颈部分（是） 曲柄销部（PA），以及它们的在该状态下，可动轴颈，这（10U，10B）和可动曲柄销，该（12）轴向地朝向固定轴颈移动时，此（9U，9B）和可动曲柄销此 （12）在轴向方向垂直的方向移动。 由此，粗臂部（AA）被轴向压缩，以降低它们的厚度，以确实的锻造曲轴的臂，和粗糙曲柄销部（PA）被垂直挤压的方向与轴向方向在偏心的量而增加 到曲柄销那样的锻造曲轴的。
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10.发明公开Structure of crankshaft for internal combustion engine 审中-公开Struktur einer Kurbelwellefüreine Brennkraftmaschine
公开(公告)号：EP2889496A1
公开(公告)日：2015-07-01
申请号：EP14199542.3
申请日：2014-12-22
CPC分类号： F16C3/08 , F16C3/14 , F16C9/04 , F16C2360/22 , Y10T74/2174
摘要： [Object] To provide a structure of a crankshaft for an internal combustion engine capable of improving the durability of the crankshaft by facilitating stress relaxation to avoid stress concentration as much as possible.
[Solving Means] Provided is a structure of a crankshaft (20) for an internal combustion engine, the crankshaft (20) being an integrated crankshaft (20) in which a thrust receiving surface (21s) is formed on each of crank arm parts (21a) around the root of a crankpin (23) in an annularly protruding manner to restrict axial movement of a connecting rod (8F, 8R). In the structure, a recessed portion (G) is formed in each of the facing surfaces of facing crank webs (21) at a position near a corner portion (A) continuing from the crankpin (23) to the crank arm part (21a), the position being so close to the crankpin (23) that part of the thrust receiving surface (21s) is cut away.摘要翻译： 提供一种用于内燃机的曲轴的结构，其能够通过促进应力松弛来提高曲轴的耐久性，以尽可能地避免应力集中。 [解决方案]提供一种用于内燃机的曲轴（20）的结构，曲轴（20）是一体式曲轴（20），其中在每个曲柄臂部分上形成有推力接收表面（21s） 21a）围绕曲柄销（23）的根部以环形突出的方式围绕，以限制连杆（8F，8R）的轴向移动。 在该结构中，在从曲柄销（23）向曲柄臂部（21a）延伸的角部（A）附近的位置处，在相对的曲柄腹板（21）的各面对面上形成有凹部（G） 所述位置与所述曲柄销（23）接近，所述推力接收表面（21s）的一部分被切除。
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