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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：US09550516B2
公开(公告)日：2017-01-24
申请号：US14387678
申请日：2014-02-24
Applicant: NSK LTD.
Inventor： Haruhiko Kiyota , Takeshi Yamamoto , Fumiaki Mitsuhashi
CPC classification number: B62D5/0409 , F16H55/06 , F16H55/22 , F16H57/0006 , F16H2055/065 , Y10T74/19907 , Y10T74/19921 , Y10T74/19953
Abstract: A core of a worm wheel has an axial end surface formed with a first annular recess and another axial end surface formed with a second annular recess. A rim portion has a first inner circumferential portion fixed to the first annular recess and a second inner circumferential portion fixed to the second annular recess. An outer circumferential wall surface of the second annular recess extends from a bottom surface of the second annular recess so as to be perpendicular to the bottom surface. A depth of the second annular recess is at least 0.1 mm but not deeper than half of a gate thickness.
Abstract translation: 蜗轮的芯部具有形成有第一环形凹部的轴向端面和形成有第二环形凹部的另一轴向端面。 边缘部分具有固定到第一环形凹部的第一内周部分和固定到第二环形凹部的第二内圆周部分。 第二环形凹部的外周壁表面从第二环形凹部的底表面延伸以垂直于底表面。 第二环形凹部的深度至少为0.1mm但不深于栅极厚度的一半。
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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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公开(公告)号：US09707992B2
公开(公告)日：2017-07-18
申请号：US14239893
申请日：2012-10-24
Applicant: NSK Ltd.
Inventor： Haruhiko Kiyota , Takeshi Yamamoto , Fumiaki Mitsuhashi , Kentaro Ogi
CPC classification number: B62D5/0454 , B62D5/0409 , F16H55/06 , F16H55/22 , F16H2055/065 , Y10T74/19921
Abstract: Worm wheel construction that is able to sufficiently increase the strength of the connecting portion between a hub 11a and a gear portion 12a, and to maintain sufficient durability even when applied to an electric power steering apparatus that applies a large auxiliary torque, is achieved.A synthetic resin gear portion 12a is molded and formed in the end portion on the outer-diameter side of a metal hub 11a. A first annular concave portion 15 is provided on one surface side in the axial direction of the hub 11a, and a second annular concave portion 22 is provided on the other surface side in the axial direction thereof. Part of the synthetic resin of the gear portion 12a is fed into the portions near the outer diameter of the first annular concave portion 15 and the second annular concave portion 22 to form a first restraining portion 18 and a second restraining portion 23. These restraining portions 18, 23 tightly hold the end portion on the outer-diameter side of the hub 11a, and improve the strength and rigidity of the connecting portion between the hub 11a and the gear portion 12a.
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公开(公告)号：US11965582B2
公开(公告)日：2024-04-23
申请号：US17428492
申请日：2020-01-15
Applicant: NSK Ltd.
Inventor： Ryou Oosawa , Satoshi Ishikuri , Haruhiko Kiyota , Souta Matsumoto , Toru Ishii , Hiroyuki Sugawara
IPC: F16H1/16 , B62D5/04 , F16H57/022 , F16H57/12
CPC classification number: F16H1/16 , B62D5/0409 , B62D5/0454 , F16H57/022 , F16H57/12 , F16H2057/127
Abstract: A worm reducer has: a housing having a wheel housing portion and a worm housing portion; a worm wheel; a worm, a support bearing having an inner ring externally fitted to the tip end portion of the worm and an outer ring; an elastic biasing means elastically biasing the outer ring toward the worm wheel side; and an elastic holding means elastically holding the outer ring from both sides in a direction orthogonal to a biasing direction by the elastic biasing means and to a center axis of the worm housing portion.
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Patent Agency Ranking
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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公开(公告)号：US09663138B2
公开(公告)日：2017-05-30
申请号：US14387683
申请日：2014-02-24
Applicant: NSK LTD.
Inventor： Haruhiko Kiyota , Takeshi Yamamoto , Fumiaki Mitsuhashi
CPC classification number: B62D5/0409 , F16H55/06 , F16H55/22 , F16H57/0006 , F16H2055/065 , Y10T74/19907 , Y10T74/19921 , Y10T74/19953
Abstract: A core of a worm wheel has an axial end surface formed with a first annular recess, another axial end surface formed with a second annular recess, and a third annular recess formed in a radially outer region of the first annular recess. A rim portion has a first inner circumferential portion fixed to the first annular recess, a second inner circumferential portion fixed to the second annular recess, and a protrusion engaged with the third annular recess.
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公开(公告)号：US10920163B2
公开(公告)日：2021-02-16
申请号：US15539474
申请日：2015-12-28
Applicant: KYODO YUSHI CO., LTD. , NSK Ltd.
Inventor： Iwaki Hirooka , Haruhiko Kiyota , Takeshi Yamamoto , Michita Hokao
IPC: C10M157/00 , C10M173/02 , C10M143/04 , C10M169/06 , F16H1/16 , F16H57/12 , F16H55/56 , C10M143/00 , C10M115/08 , B62D5/04 , C10M105/04 , C10M143/12 , F16H55/22 , F16H57/04 , F16H55/24 , C10N10/02 , C10N10/12 , C10N20/04 , C10N30/06 , C10N30/00 , C10N40/04 , C10N40/06 , C10N50/10
Abstract: The invention provides a grease composition for lubricating resins which contains a base oil, a diurea compound represented by formula (I) as a thickener: R1—NHCONH—R2—NHCONH—R3 (I) (wherein R2 represents a bivalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and R1 and R3 each independently represent a straight-chain or branched alkyl group having 8 to 22 carbon atoms), and a chained hydrocarbon polymer having a weight-average molecular weight of 20,000 to 300,000.
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公开(公告)号：US09616917B2
公开(公告)日：2017-04-11
申请号：US14387615
申请日：2014-02-24
Applicant: NSK LTD.
Inventor： Haruhiko Kiyota , Takeshi Yamamoto , Fumiaki Mitsuhashi
CPC classification number: B62D5/0409 , F16H55/06 , F16H55/22 , F16H57/0006 , F16H2055/065 , Y10T74/19907 , Y10T74/19921 , Y10T74/19953
Abstract: A core of a worm wheel has an axial end surface formed with a first annular recess nad and another axial end surface formed with a second annular recess. An outer circumferential wall surface of a radially outer region of the second annular recess has a tapered surface extending from a bottom surface of the second annular recess to form an obtuse angle relative to the bottom surface, and a third annular recess formed radially outside the tapered surface. A cross-section of the third annular recess is a right-angled triangle having, as two sides, a surface parallel to the bottom surface of the second annular recess and a surface perpendicular to the bottom surface of the second annular recess. A rim portion has a first inner circumferential portion fixed to the first annular recess and a second inner circumferential portion fixed to the second annular recess.
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公开(公告)号：US09387873B2
公开(公告)日：2016-07-12
申请号：US14239646
申请日：2012-09-28
Applicant: NSK LTD.
Inventor： Haruhiko Kiyota , Takeshi Murakami
CPC classification number: B62D5/0403 , B62D5/0409 , B62D6/10 , G01L3/101 , G01L5/221
Abstract: A power assist apparatus includes an electric motor, a speed reducer, an annular torque sensor, a housing in which the speed reducer and the torque sensor are arranged, and an annular center aligning bracket. The housing includes a first housing element and a second housing element, and one of the first housing element and the second housing element is made of a synthetic resin. The center aligning bracket is fixed to the one of the first housing element and the second housing element by insert molding such that the center aligning bracket is concentric to the one of the first housing element and the second housing element. The first housing element and the second housing element are joined such that the first housing element and the second housing element are engaged with each other in an axial direction of the torque sensor via the center aligning bracket.
Abstract translation: 动力辅助装置包括电动机，减速器，环形扭矩传感器，设置有减速器和转矩传感器的壳体和环形中心对准支架。 壳体包括第一壳体元件和第二壳体元件，并且第一壳体元件和第二壳体元件中的一个由合成树脂制成。 中心对准支架通过插入成型固定到第一壳体元件和第二壳体元件中的一个，使得中心对准支架与第一壳体元件和第二壳体元件中的一个同心。 第一壳体元件和第二壳体元件被接合，使得第一壳体元件和第二壳体元件经由中心对准支架在扭矩传感器的轴向方向上彼此接合。
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