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公开(公告)号：US20210139072A1
公开(公告)日：2021-05-13
申请号：US16492268
申请日：2018-03-28
Applicant: NSK LTD.
Inventor： Toru Segawa , Ryou Oosawa , Toru Ishii , Ryota Sugihara , Takeshi Yamamoto , Akihide Fujita
Abstract: Provided is a torque transmission joint that is able to suppress occurrence of noise when reversing the direction of rotation of the drive shaft. The first transmission member 17 fixed to the output shaft 12a which is a drive shaft is engaged with the first elastic member 20 in a state where the first gap in the circumferential direction is interposed, as well as with the intermediate transmission member 19 in a state where a gap in the circumferential direction which is larger than the first gap is interposed. The second transmission member 18 fixed to an end portion of the worm 8 is engaged with the second elastic member 21 in a state where the second gap in the circumferential direction is interposed, as well as with the intermediate transmission member 19 in a state where a gap in the circumferential direction which is larger than the second gap. The first annular convex portion 54 is pressure fitted to the first annular concave portion 38, and the second annular convex portion 60 is pressure fitted to the second annular concave portion 45 so as to prevent separation of the first, second elastic members 20, 21 with respect to the intermediate transmission member 19.
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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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Patent Agency Ranking
公开(公告)号：US09233709B2
公开(公告)日：2016-01-12
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：US11648978B2
公开(公告)日：2023-05-16
申请号：US16492268
申请日：2018-03-28
Applicant: NSK LTD.
Inventor： Toru Segawa , Ryou Oosawa , Toru Ishii , Ryota Sugihara , Takeshi Yamamoto , Akihide Fujita
CPC classification number: B62D5/0409 , B62D5/0454 , F16D3/74
Abstract: A torque transmission joint to suppress occurrence of noise when reversing the direction of rotation of a drive shaft. A first transmission member fixed to an output shaft (the drive shaft) is engaged with a first elastic member such that a first gap in a circumferential direction is interposed, as well as with an intermediate transmission member such that a larger gap in the circumferential direction is interposed. A second transmission member fixed to an end portion of a worm is engaged with a second elastic member such that a second gap in the circumferential direction is interposed, as well as with the intermediate transmission member such that a larger gap in the circumferential direction is interposed. First and second annular convex portions are fitted to, respectively, first and second concave portions to prevent separation of the first and second elastic members with respect to the intermediate transmission member.
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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：US09796418B2
公开(公告)日：2017-10-24
申请号：US14355562
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 torque transmission joint has a shock-absorbing member between a drive shaft and a driven shaft. When the drive shaft is rotated in one direction, forces due to torque transmitted from the drive shaft to the driven shaft act inward in a radial direction of the shock-absorbing member on held sections that are held between one side surfaces in the circumferential direction of drive-side arm sections that are positioned in the front side in the one direction of rotation of the drive shaft, and side surfaces in the circumferential direction of driven-side arm sections that are positioned on the rear side in the one direction of rotation of the drive shaft.
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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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