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公开(公告)号：US20170362530A1
公开(公告)日：2017-12-21
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: C10M143/04 , B62D5/04 , F16H55/22 , C10M169/06 , C10M105/04 , C10M115/08 , C10M143/00 , C10M143/12 , F16H57/04 , F16H1/16
CPC classification number: C10M143/04 , B62D5/0409 , C10M105/04 , C10M115/08 , C10M143/00 , C10M143/12 , C10M169/06 , C10M2203/024 , C10M2205/02 , C10M2205/022 , C10M2205/024 , C10M2205/028 , C10M2205/0285 , C10M2205/04 , C10M2205/06 , C10M2205/14 , C10M2205/18 , C10M2207/1256 , C10M2207/1265 , C10M2207/1285 , C10M2215/064 , C10M2215/1026 , C10M2219/044 , C10M2219/068 , C10N2210/01 , C10N2210/06 , C10N2220/021 , C10N2230/06 , C10N2230/74 , C10N2240/04 , C10N2240/06 , C10N2250/10 , F16H1/16 , F16H55/22 , F16H55/24 , F16H55/566 , F16H57/0464 , F16H57/0498 , F16H57/12
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：US20150354688A1
公开(公告)日：2015-12-10
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.
Abstract translation: 蜗轮的芯具有形成有第一环形凹部，形成有第二环形凹部的另一轴向端面和形成在第一环形凹部的径向外部区域中的第三环形凹部的轴向端面。 边缘部分具有固定到第一环形凹部的第一内周部分，固定到第二环形凹部的第二内圆周部分和与第三环形凹部接合的突出部。
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公开(公告)号：US20150345609A1
公开(公告)日：2015-12-03
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.
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。 第二环形凹部的径向外部区域的外周壁表面具有从第二环形凹部的底表面延伸的锥形表面，以相对于底表面形成钝角，以及形成在锥形部分的径向外侧的第三环形凹部 表面。 第三环形凹部的横截面是直角三角形，其具有平行于第二环形凹部的底表面的表面和垂直于第二环形凹部的底表面的表面的两侧。 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。
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公开(公告)号：US20150298724A1
公开(公告)日：2015-10-22
申请号：US14387700
申请日：2013-10-28
Applicant: NSK LTD.
Inventor： Tatsuya ISHII , Takeshi YAMAMOTO , Seiichi MORIYAMA
IPC: B62D5/04
CPC classification number: B62D5/0403 , B62D5/0409
Abstract: An electric power steering apparatus has a first rolling bearing and a second rolling bearing rotatably supporting an output shaft. The first rolling bearing is provided between an inner peripheral surface of a through-hole of a gear housing and an outer peripheral surface of the output shaft. The second rolling bearing is provided between an inner peripheral surface of an intermediate plate and the outer peripheral surface of the output shaft. The intermediate plate has an outer peripheral portion supported and fixed in an opening portion of the gear housing.
Abstract translation: 电动助力转向装置具有第一滚动轴承和可旋转地支撑输出轴的第二滚动轴承。 第一滚动轴承设置在齿轮壳体的通孔的内周面与输出轴的外周面之间。 第二滚动轴承设置在中间板的内周面与输出轴的外周面之间。 中间板具有支撑并固定在齿轮壳体的开口部分中的外周部分。
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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
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).
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Patent Agency Ranking
公开(公告)号：US20230272848A1
公开(公告)日：2023-08-31
申请号：US18014611
申请日：2021-05-14
Applicant: NSK LTD.
Inventor： Atsushi MIYAZAKI , Tomohiro ARAI , Haruhiko KIYOTA , Takeshi YAMAMOTO
CPC classification number: F16H55/22 , B29C45/2708 , B29C45/14336 , F16H1/16
Abstract: A method for manufacturing a worm wheel including an inner wheel element including a side plate portion and a tubular eave portion, and an outer wheel element including a wheel tooth portion on an outer circumferential surface thereof, and coupled and fixed to the inner wheel element in a manner of covering a radially outer portion of the side plate portion and the eave portion, the method includes: molding the outer wheel element by disposing a mold around a radially outer portion of the inner wheel element, and feeding the molten synthetic resin from an annular or arc-shaped injection gate toward a pocket portion that is continuous over an entire circumference of a cavity present between an inner surface of the mold and a surface of the inner wheel element and that is present on a radially inner side of the eave portion.
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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
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：US20150354687A1
公开(公告)日：2015-12-10
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 nad 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：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
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：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
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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