公开(公告)号：US20220363304A1

公开(公告)日：2022-11-17

申请号：US17772779

申请日：2020-11-05

Applicant: NSK LTD.

Inventor： Seiichi MORIYAMA ,  Keisuke NAKAO ,  Kaname YASUDA ,  Naofumi FUJITA

IPC: B62D1/20 ,  F16J15/52

Abstract: Provided is an outer tube including a solid-shaped male-shaft portion and a bottomed cylindrical female-tube portion integrally formed with the male shaft portion. A hole cover is externally fitted to the female-tube portion and closes a gap between a dash panel separating the vehicle cabin interior and the vehicle cabin exterior of a vehicle body and the outer tube. In an assembled state in the vehicle body, the solid male-shaft portion is arranged in the vehicle cabin exterior, and an opening portion of a slide hole provided in the female-tube portion is arranged in the vehicle cabin interior.

公开(公告)号：US20190040941A1

公开(公告)日：2019-02-07

申请号：US16076959

申请日：2017-02-15

Applicant: NSK LTD.

Inventor： Haruhiko KIYOTA ,  Takeshi YAMAMOTO ,  Kaname YASUDA ,  Tomohiro ARAI ,  Junichi TAKANO ,  Kazuki HOTTA

IPC: F16H55/06 ,  F16H1/16 ,  F16H55/22

Abstract: Provided is a worm wheel formed by combining a metal part and a synthetic resin part to realize a reduction in weight. The worm wheel (4a) is formed by combining an inner wheel element (15a) and an outer wheel element (16a). The inner wheel element (15a) includes a metal core (24) made of metal and formed in an annular shape, and a resin core (25) made of a synthetic resin and formed in an annular shape to surround an outer circumference of the metal core (24). The outer wheel element (16a) is made of a synthetic resin and formed in an annular shape, includes a worm wheel tooth part (19a) on an outer circumferential surface, and surrounds an outer circumference of the resin core (25).

公开(公告)号：US20210180676A1

公开(公告)日：2021-06-17

申请号：US16074363

申请日：2017-01-26

Applicant: NSK LTD.

Inventor： Haruhiko KIYOTA ,  Takeshi YAMAMOTO ,  Kaname YASUDA ,  Tomohiro ARAI ,  Junichi TAKANO ,  Kazuki HOTTA

IPC: F16H55/22 ,  F16H55/06 ,  F16H1/16 ,  F16C19/36 ,  B29C45/14 ,  B29C45/27

Abstract: A first concave-convex part is formed in an outer diameter side circumferential surface of a first annular concave part provided in an axial one-side surface of an inner wheel element, and a second concave-convex part is formed in a bottom surface of a second annular concave part provided in the axial other-side surface of the inner wheel element. An outer circumferential part of the inner wheel element is embedded in an outer wheel element, and synthetic resin forming the outer wheel element partially enters into a plurality of concave parts constituting the first concave-convex part and the second concave-convex part. Thus, a configuration is achieved in which the holding power of a synthetic resin outer wheel can be secured from the metal inner wheel element, and the manufacturing error can be suppressed in the worm wheel tooth part provided in the outer circumferential surface of the outer wheel.

公开(公告)号：US20200290113A1

公开(公告)日：2020-09-17

申请号：US16496596

申请日：2018-02-13

Applicant: NSK Ltd.

Inventor： Tatsuya SUEHIRO ,  Kaname YASUDA ,  Kazuya YAMADA

IPC: B21K1/12 ,  B21J5/10 ,  B62D1/20 ,  B62D5/04 ,  F16D1/02 ,  B21J5/02

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：US20210148437A1

公开(公告)日：2021-05-20

申请号：US16074333

申请日：2017-01-26

Applicant: NSK LTD.

Inventor： Haruhiko KIYOTA ,  Takeshi YAMAMOTO ,  Kaname YASUDA ,  Tomohiro ARAI ,  Junichi TAKANO ,  Kazuki HOTTA

IPC: F16H1/16 ,  F16H55/06 ,  F16H55/22

Abstract: An outer wheel element (16a) formed in an annular shape with a synthetic resin and having a worm wheel tooth part (19a) on an outer circumferential surface thereof embeds a radially outer end part of an inner wheel element (15a) formed in an annular shape with a metal. An outer circumferential surface of the inner wheel element (15a), which is radially superimposed with an engaging part between the worm tooth part (19a) and a the worm wheel tooth part serves as a cylindrical surface part (24). This realizes a structure capable of suppressing manufacturing error of the worm wheel tooth part engaging with the worm tooth part.

公开(公告)号：US20210088112A1

公开(公告)日：2021-03-25

申请号：US16074354

申请日：2017-01-26

Applicant: NSK LTD.

Inventor： Haruhiko KIYOTA ,  Takeshi YAMAMOTO ,  Kaname YASUDA ,  Tomohiro ARAI ,  Junichi TAKANO ,  Kazuki HOTTA

IPC: F16H1/16 ,  B29C45/14 ,  B29C45/27 ,  F16H55/17 ,  F16H55/06 ,  F16C19/16

Abstract: An inner wheel element (15a) is embedded in an outer wheel element (16a), such that a continuous range from an inner diameter side circumferential surface configuring an inner surface of a first annular concave part (22), through an outer circumferential surface of the inner wheel element (15a), to an inner diameter side circumferential surface configuring an inner surface of a second annular concave part (38) in a surface of the inner wheel element (15a) is covered over the entire circumference. Accordingly, a structure is achieved which easily secures a holding power of the synthetic resin outer wheel element with respect to the inner wheel element.

公开(公告)号：US20200377145A1

公开(公告)日：2020-12-03

申请号：US16497094

申请日：2018-02-13

Applicant: NSK Ltd.

Inventor： Tatsuya SUEHIRO ,  Kaname YASUDA ,  Kazuya YAMADA

IPC: B62D5/04 ,  B62D5/00 ,  B21K1/06

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.

公开(公告)号：US20200062291A1

公开(公告)日：2020-02-27

申请号：US16609774

申请日：2017-06-22

Applicant: NSK Ltd.

Inventor： Kaname YASUDA ,  Tatsuya SUEHIRO ,  Kazuya YAMADA

IPC: B62D1/20 ,  B62D5/04 ,  B21K1/06

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.