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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：US10738834B2
公开(公告)日：2020-08-11
申请号：US15561237
申请日：2016-04-27
Applicant: NSK LTD.
Inventor： Ryou Oosawa , Nobuyuki Nishimura
Abstract: Circumferential rigidity of both axial end portions of each coupling-side convex portion is lower than circumferential rigidity of an axially intermediate portion of each coupling-side convex portion. The drive-side concave-convex portion is engaged with a half portion on the other axial side of the coupling-side concave-convex portion. The driven-side concave-convex portion is engaged with a half portion on one axial side of the coupling-side concave-convex portion.
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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：US10288126B2
公开(公告)日：2019-05-14
申请号：US15327453
申请日：2015-09-18
Applicant: NSK LTD.
Inventor： Toru Segawa , Ryou Oosawa
Abstract: A driving-side transmission portion of an output shaft of an electric motor and a driven-side transmission portion of a worm shaft are coupled to each other via a torque transmission joint including an elastic member and a coupling such that the torque can be transmitted. One axial end portion of a coupling-side concave-convex portion of the coupling is engaged with a first driving-side concave-convex portion of the driving-side transmission portion with a gap in the circumferential direction, and the other axial end portion thereof is engaged with a first driven-side concave-convex portion of the driven-side transmission portion with a gap in the circumferential direction. The elastic member is provided between an axial center portion of the coupling-side concave-convex portion, and a second driving-side concave-convex portion of the driving-side transmission portion and a second driven-side concave-convex portion of the driven-side transmission portion such that the torque can be transmitted respectively.
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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：US11015656B2
公开(公告)日：2021-05-25
申请号：US16323942
申请日：2017-08-07
Applicant: NSK LTD.
Inventor： Toru Ishii , Toru Segawa , Ryou Oosawa , Nobuyuki Nishimura
Abstract: A driving-side concave-convex portion of a driving-side transmission member is engaged with an elastic member. The driving-side concave-convex portion is engaged with an intermediate concave-convex portion of an intermediate transmission member with a circumferential gap being interposed therebetween. A driven-side concave-convex portion of a driven-side transmission member is engaged with the elastic member. The driven-side concave-convex portion is engaged with the intermediate concave-convex portion with a circumferential gap being interposed therebetween. Both axial side surfaces and a periphery of the intermediate transmission member are covered by a side surface covering portion and a periphery covering portion of the elastic member.
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公开(公告)号：US10982721B2
公开(公告)日：2021-04-20
申请号：US16307633
申请日：2017-10-12
Applicant: NSK LTD.
Inventor： Ryou Oosawa , Toru Segawa , Toru Ishii
Abstract: A first concave-convex portion of a first transmission member is engaged with an intermediate concave-convex portion of an intermediate transmission member with a circumferential gap being therebetween. A second concave-convex portion of a second transmission member is engaged with the intermediate concave-convex portion with a circumferential gap being therebetween. A first elastic member and a second elastic member are engaged with a first engagement portion and a second engagement portion of the intermediate transmission member such that separation between the intermediate transmission member and the first elastic member and the second elastic member can be prevented.
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公开(公告)号：US10408271B2
公开(公告)日：2019-09-10
申请号：US15564473
申请日：2016-04-15
Applicant: NSK LTD.
Inventor： Ryou Oosawa
Abstract: At a state where central axes of the drive shaft and the driven shaft are matched, the drive-side concave-convex portion is engaged with a half portion on the other axial side of the coupling-side concave-convex portion with a drive-side gap of which a circumferential width size increases towards the other axial side being interposed between a circumferential side surface of each drive-side convex portion and a circumferential side surface of each coupling-side convex portion. At the state where the central axes of the drive shaft and the driven shaft are matched, the driven-side concave-convex portion is engaged with a half portion on one axial side of the coupling-side concave-convex portion with a driven-side gap of which a circumferential width size increases towards one axial side being interposed between a circumferential side surface of each driven-side convex portion and a circumferential side surface of each coupling-side convex portion.
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