公开(公告)号：US20010045198A1

公开(公告)日：2001-11-29

申请号：US09912387

申请日：2001-07-26

Applicant: NSK Ltd.

Inventor： Kiyoshi Okubo ,  Shoichi Abe ,  Satoshi Kadokawa ,  Hiroshi Iwasa

IPC: F01L001/18

CPC classification number: B21K1/205 ,  F01L1/185 ,  Y10T29/49295 ,  Y10T29/49995 ,  Y10T74/20882

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of though holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.

公开(公告)号：US20030196469A1

公开(公告)日：2003-10-23

申请号：US10315281

申请日：2002-12-09

Applicant: NSK LTD.

Inventor： Akira Tsubouchi ,  Kiyoshi Okubo ,  Yasushi Watanabe

IPC: B21D017/00

CPC classification number: B21K1/767 ,  B21C37/155 ,  B21K1/063 ,  B62D3/126 ,  Y10S72/702 ,  Y10T29/49467 ,  Y10T29/49474 ,  Y10T29/49476 ,  Y10T74/1967 ,  Y10T74/19949

Abstract: 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.

Abstract translation: 通过第一步骤，第二步骤和第三步骤制造空心齿条轴。 在第一步骤中，大致矩形的板状工件被压制成沟槽状。 在该步骤中使用的第一模具设置有倾斜的模具表面，用于抵消当从第一模具组移除工件时在工件处产生的弹性恢复。 在第二步骤中，在第一步骤中形成的工件的平坦底部上压制一排齿条齿。 在第二步骤中使用的模具设置有用于在冲压加工的冲程端处释放模具间隙内的多余工件材料的凹部。 在第三步骤中，工件的一对腿中的每一个被弯曲成半圆形以便彼此对接。 此时，心轴插入工件的腿部之间。

公开(公告)号：US20030079517A1

公开(公告)日：2003-05-01

申请号：US10316385

申请日：2002-12-11

Applicant: NSK LTD.

Inventor： Akira Tsubouchi ,  Kiyoshi Okubo ,  Yasushi Watanabe

IPC: B21D017/00

CPC classification number: B21K1/767 ,  B21C37/155 ,  B21K1/063 ,  B62D3/126 ,  Y10S72/702 ,  Y10T29/49467 ,  Y10T29/49474 ,  Y10T29/49476 ,  Y10T74/1967 ,  Y10T74/19949

Abstract: 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.

公开(公告)号：US20030079516A1

公开(公告)日：2003-05-01

申请号：US10315297

申请日：2002-12-09

Applicant: NSK LTD.

Inventor： Akira Tsubouchi ,  Kiyoshi Okubo ,  Yasushi Watanabe

IPC: B21D017/00

CPC classification number: B21K1/767 ,  B21C37/155 ,  B21K1/063 ,  B62D3/126 ,  Y10S72/702 ,  Y10T29/49467 ,  Y10T29/49474 ,  Y10T29/49476 ,  Y10T74/1967 ,  Y10T74/19949

Abstract: 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.

公开(公告)号：US20030213321A1

公开(公告)日：2003-11-20

申请号：US10459749

申请日：2003-06-12

Applicant: NSK Ltd.

Inventor： Akira Tsubouchi ,  Kiyoshi Okubo ,  Yasushi Watanabe

IPC: F16H001/04

CPC classification number: F16H55/26 ,  B21K1/767 ,  B21K1/768 ,  B62D3/126 ,  Y10T74/1967

Abstract: The object of the invention is to provide a rack shaft having two rack teeth groups and hollowed throughout the whole body, to lightweightize the shaft and to reduce the cost. The two rack teeth groups 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 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.

公开(公告)号：US20030029403A1

公开(公告)日：2003-02-13

申请号：US10254533

申请日：2002-09-26

Applicant: NSK Ltd.

Inventor： Kiyoshi Okubo ,  Shoichi Abe ,  Satoshi Kadokawa ,  Hiroshi Iwasa

IPC: F01L001/18

CPC classification number: B21K1/205 ,  F01L1/185 ,  Y10T29/49295 ,  Y10T29/49995 ,  Y10T74/20882

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of though holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.

公开(公告)号：US20020112685A1

公开(公告)日：2002-08-22

申请号：US09912366

申请日：2001-07-26

Applicant: NSK Ltd.

Inventor： Kiyoshi Okubo ,  Shoichi Abe ,  Satoshi Kadokawa ,  Hiroshi Iwasa

IPC: F01L001/18

CPC classification number: B21K1/205 ,  F01L1/185 ,  Y10T29/49295 ,  Y10T29/49995 ,  Y10T74/20882

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of though holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.

Abstract translation: 一种钣金摇臂，通过冲压一个金属板以形成具有预定轮廓和通孔的坯料的步骤制造，并且对该坯料进行基于冲压加工的弯曲加工以形成彼此平行的一对侧壁 以及用于连接侧壁的宽度方向的两端的连接部。 该摇臂还具有形成在两侧壁上彼此对准的位置的至少一对通孔和设置在连接部的一部分中的至少一个接合部。 至少一个接合部分的厚度被形成为大于两个侧壁的厚度。

公开(公告)号：US20020026845A1

公开(公告)日：2002-03-07

申请号：US09832449

申请日：2001-04-10

Applicant: NSK Ltd.

Inventor： Akira Tsubouchi ,  Kiyoshi Okubo ,  Yasushi Watanabe

IPC: F16H055/08 ,  F16H055/10

CPC classification number: F16H55/26 ,  B21K1/767 ,  B21K1/768 ,  B62D3/126 ,  Y10T74/1967 ,  Y10T74/19949

Abstract: 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.

Abstract translation: 通过形成板状工件制造中空的齿条轴，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。 牙齿的齿体和齿底的厚度根据不平整度的尺寸进行调节。 由此，防止齿条轴的各点处的应力集中，并且轴被加强和轻量化。

公开(公告)号：US20040216711A1

公开(公告)日：2004-11-04

申请号：US10702047

申请日：2003-11-06

Applicant: NSK Ltd.

Inventor： Kiyoshi Okubo ,  Shoichi Abe ,  Satoshi Kadokawa ,  Hiroshi Iwasa

IPC: F01L001/18

CPC classification number: B21K1/205 ,  F01L1/185 ,  Y10T29/49295 ,  Y10T29/49995 ,  Y10T74/20882

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of though holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.

公开(公告)号：US20020104498A1

公开(公告)日：2002-08-08

申请号：US10101868

申请日：2002-03-21

Applicant: NSK Ltd.

Inventor： Kiyoshi Okubo ,  Shoichi Abe ,  Satoshi Kadokawa ,  Hiroshi Iwasa

IPC: F01L001/18

CPC classification number: B21K1/205 ,  F01L1/185 ,  Y10T29/49295 ,  Y10T29/49995 ,  Y10T74/20882

Abstract: A sheet metal rocker arm manufactured by the steps of punching one metal plate to form a blank having a predetermined contour and through holes, and subjecting this blank to a bending work based on a press work to form a pair of side walls parallel to each other and a connecting portion for connecting the both ends of the side walls in the width direction thereof. This rocker arm is also provided with at least a pair of though holes formed at positions which are aligned with each other on the both side walls and at least one engagement portion provided in a part of the connecting portion. The thickness of at least one engagement portion, is formed to be greater than the thickness of the both side walls.