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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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公开(公告)号：US10059364B2
公开(公告)日：2018-08-28
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.
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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：US20150217804A1
公开(公告)日：2015-08-06
申请号：US14355562
申请日：2013-07-29
Applicant: NSK Ltd.
Inventor： Seiichi Moriyama , Hiroshi Shibazaki , Toru Segawa , Takeshi Yamamoto , Kazuhiko Kojima
IPC: B62D7/22 , B62D5/04 , F16F15/124 , F16D3/68
CPC classification number: B62D7/224 , B62D5/04 , B62D5/0409 , B62D5/0454 , F16D3/64 , F16D3/68 , F16F15/1245 , F16H1/16
Abstract: A shock-absorbing member 18a comprises combined held sections 33 that are located at a plurality of locations in the circumferential direction and that comprise paired held sections 25a, 25b that each have a mirror symmetry about an imaginary plane that passes through the center axis of the shock-absorbing member 18a and that are inclined in a direction toward the imaginary plane with respect to the radial direction as going toward the outside in the radial direction. Side surfaces 29a, 30a in the circumferential direction of the drive-side arm sections 21a and the driven-side arm sections 23a that are positioned at the front in the direction of rotation of the drive shaft 12a are inclined in a direction toward the front in the direction of rotation with respect to the radial direction as going toward the outside in the radial direction; and when the drive shaft 12a is rotated and driven, forces inward in the radial direction of the shock-absorbing member 18a act on the held sections 25a that are held between the side surfaces 29a in the circumferential direction of the drive-side arm sections 21a that are positioned in the front in the direction of rotation and the side surfaces 30b in the circumferential direction of the driven-side arm sections 23a that are positioned in the rear in the direction of rotation.
Abstract translation: 减震构件18a包括组合的保持部分33，其位于周向上的多个位置处，并且包括成对的保持部分25a，25b，每个保持部分具有围绕穿过中心轴线的虚拟平面的镜像对称 减震构件18a，并且在向径向方向朝向外侧的相对于径向的假想平面的方向倾斜。 位于驱动轴12a的旋转方向前方的驱动侧臂部21a和从动侧臂部23a的周向的侧面29a，30a朝向前方的方向倾斜 相对于径向的旋转方向朝向径向外侧的方向; 并且当驱动轴12a旋转驱动时，沿着减震部件18a的径向向内的力作用在驱动侧臂部21a的周向上保持在侧面29a之间的保持部25a上 位于沿着旋转方向的前方以及从动侧臂部23a的沿着旋转方向位于后方的周向的侧面30b。
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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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Patent Agency Ranking
公开(公告)号：US09718493B2
公开(公告)日：2017-08-01
申请号：US14355566
申请日：2013-07-29
Applicant: NSK Ltd.
Inventor： Seiichi Moriyama , Hiroshi Shibazaki , Toru Segawa , Takeshi Yamamoto , Kazuhiko Kojima
CPC classification number: B62D7/224 , B62D5/04 , B62D5/0409 , B62D5/0454 , F16D3/64 , F16D3/68 , F16F15/1245 , F16H1/16
Abstract: A shock-absorbing member comprises held sections located at a plurality of locations in a circumferential direction and comprising paired held sections and non-paired held sections, and is constructed to have a non-circular cylindrical shape in cross-section. Portions where outer-diameter side end sections of held sections that are adjacent to each other in the circumferential direction are made continuous by way of outer-diameter side cover sections, and portions where inner-diameter side end sections of held sections that are adjacent to each other in the circumferential direction are made continuous directly or by way of inner-diameter side cover sections, in an alternating sequence in the circumferential direction. Drive-side arm sections are placed between the non-paired held sections, driven-side arm sections are placed between the paired held sections, and the outer circumferential surfaces of the drive-side arm sections are covered by the outer-diameter side cover sections.
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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：US20150225011A1
公开(公告)日：2015-08-13
申请号：US14388024
申请日：2013-10-28
Applicant: NSK LTD.
Inventor： Tatsuya Ishii , Takeshi Yamamoto , Seiichi Moriyama
IPC: B62D5/04
CPC classification number: B62D5/0409 , B62D5/0403
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 press-fitted and fixed in an opening portion of the gear housing and the outer peripheral surface of the output shaft. An outer peripheral portion of the intermediate plate has alternately arranged large diameter portions and small diameter portions, and the large diameter portions are press-fitted in 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被压配合并固定在齿轮箱的开口部分和输出轴的外周面之间的中间板的内周面之间。 中间板的外周部分交替布置有大直径部分和小直径部分，并且大直径部分被压配合在齿轮壳体中。
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公开(公告)号：US20150129348A1
公开(公告)日：2015-05-14
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.
Abstract translation: 能够充分提高轮毂11a和齿轮部12a之间的连接部的强度的蜗轮构造，并且即使在施加到施加大的辅助转矩的电动助力转向装置时也能够保持足够的耐久性。 合成树脂齿轮部分12a模制并形成在金属轮毂11a的外径侧的端部中。 第一环状凹部15设置在毂部11a的轴向的一个表面侧，并且在轴向的另一个表面侧设置有第二环状凹部22。 齿轮部12a的合成树脂的一部分被供给到第一环形凹部15和第二环状凹部22的外径附近的部分，形成第一限制部18和第二约束部23.这些限制部 紧固在轮毂11a的外径侧的端部，提高轮毂11a与齿轮部12a之间的连接部的强度和刚性。
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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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