公开(公告)号：US11541450B2

公开(公告)日：2023-01-03

申请号：US16496596

申请日：2018-02-13

Applicant: NSK Ltd.

Inventor： Tatsuya Suehiro ,  Kaname Yasuda ,  Kazuya Yamada

IPC: B21J5/02 ,  B21J5/10 ,  B21J5/12 ,  B62D1/20 ,  B62D5/04 ,  B21K1/12 ,  B21K1/10 ,  B21K21/12 ,  B21K21/08 ,  F16C3/02 ,  B21C1/24 ,  F16D1/02 ,  B21K1/06 ,  B21J5/00

Abstract: To provide a method of manufacturing a shaft for a steering device, the shaft including a spline shaft part to be coupled with an input shaft, a stopper part to be coupled with an output shaft, and an intermediate shaft part that couples the spline shaft part with the stopper part. The method includes: a step of forming a hole part recessed in an axial direction from one end of a pillar-shaped material by forging; and a step of pressing the material in which the hole part has been formed into a die to perform drawing in a radial direction on a portion of the material at which the spline shaft part and the intermediate shaft part are formed, and prolonging a length along the axial direction of the hole part at the same time by forging.

公开(公告)号：US11383757B2

公开(公告)日：2022-07-12

申请号：US16609774

申请日：2017-06-22

Applicant: NSK Ltd.

Inventor： Kaname Yasuda ,  Tatsuya Suehiro ,  Kazuya Yamada

IPC: B62D1/20 ,  B21K1/06 ,  B62D5/04

Abstract: A shaft for a steering device has a first portion, a second portion, and a third portion that is a shaft integrated with the first portion and the second portion and couples the first portion and the second portion in a first direction. The outer diameter of the third portion is smaller than the length of the second portion in a second direction intersecting with the first direction, and is constant across a direction extending along the first direction. The hardness of the third portion is greater than the hardness of the second portion, and is constant across the direction extending along the first direction.

公开(公告)号：US11242085B2

公开(公告)日：2022-02-08

申请号：US16497094

申请日：2018-02-13

Applicant: NSK Ltd.

Inventor： Tatsuya Suehiro ,  Kaname Yasuda ,  Kazuya Yamada

IPC: B21K1/06 ,  B62D5/04 ,  B62D5/00 ,  B62D65/00

Abstract: To provide a method of manufacturing a shaft for a steering device, the shaft including a spline shaft part to be coupled with an input shaft, a stopper part to be coupled with an output shaft, and an intermediate shaft part that couples the spline shaft part with the stopper part. The method includes: a step of forming a hole part recessed in an axial direction from one end of a pillar-shaped material by forging; and a step of pressing the material in which the hole part has been formed into a die to perform drawing in a radial direction on a portion of the material at which the stopper part is formed and prolonging a length along the axial direction of the hole part at the same time by forging.