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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
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.
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公开(公告)号：US12077207B2
公开(公告)日：2024-09-03
申请号：US17772779
申请日：2020-11-05
Applicant: NSK LTD.
Inventor： Seiichi Moriyama , Keisuke Nakao , Kaname Yasuda , Naofumi Fujita
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.
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公开(公告)号：US11041544B2
公开(公告)日：2021-06-22
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
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.
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Patent Agency Ranking
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.
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公开(公告)号：US11047466B1
公开(公告)日：2021-06-29
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 , B29C45/14 , F16C19/36 , B29C45/27 , B29K705/00 , B62D5/04 , B29L15/00
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.
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公开(公告)号：US20220063705A1
公开(公告)日：2022-03-03
申请号：US17418795
申请日：2019-12-11
Applicant: NSK LTD.
Inventor： Kaname Yasuda , Kentaro Unno , Takanori Mayuzumi , Hisashi Terakado
Abstract: With respect to a linear motion shaft in which a rack shaft part and a ball screw shaft part are joined to each other by friction welding, coaxiality of a portion having a rack shaft part and a portion having a ball screw shaft part is improved. In a state where a gripped portion 56 formed on the screw shaft part 29 is gripped by a first gripping tool 57 for centering, and a rack shaft part 28 is gripped by a second gripping tool 58 for centering, end portions in the axial direction of the rack shaft part 28 and the screw shaft part 29 are abutted to each other while the screw shaft part 29 and the rack shaft part 28 are relatively rotated by rotating the first gripping tool 57, so that the rack shaft part 28 and the screw shaft part 29 are joined to each other by friction welding.
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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
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.
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公开(公告)号：US11168761B2
公开(公告)日：2021-11-09
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 , F16C19/16 , F16H55/06 , F16H55/17 , B29K705/00 , B29L15/00 , B62D5/04
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.
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