公开(公告)号：US20200290666A1

公开(公告)日：2020-09-17

申请号：US16082235

申请日：2017-03-07

申请人： NSK LTD.

发明人： Ryou OOSAWA

IPC分类号： B62D5/04

摘要： The driven-side concave-convex part is engaged to the second coupling-side concave-convex part, and the driven-side concave-convex part is engaged to a part, which is located further toward the other axial side than the partition wall part, of the third coupling-side concave-convex part in a state where a circumferential gap, which is greater than a circumferential gap provided to an engagement part between the driven-side concave-convex part and the second coupling-side concave-convex part, is interposed therebetween. At least a part of the partition wall part is arranged between axial end faces of the drive-side transmission member and the driven-side transmission member.

公开(公告)号：US20190264751A1

公开(公告)日：2019-08-29

申请号：US16307633

申请日：2017-10-12

申请人： NSK LTD.

发明人： Ryou OOSAWA ,  Toru SEGAWA ,  Toru ISHII

IPC分类号： F16D3/74 ,  B62D5/04 ,  F16H1/16 ,  F16H57/12

摘要： 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.

公开(公告)号：US20170175821A1

公开(公告)日：2017-06-22

申请号：US15327453

申请日：2015-09-18

申请人： NSK LTD.

发明人： Toru SEGAWA ,  Ryou OOSAWA

IPC分类号： F16D3/68 ,  F16D3/74 ,  B62D5/04

CPC分类号： F16D3/68 ,  B62D5/04 ,  B62D5/0454 ,  F16D3/54 ,  F16D3/74

摘要： 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.

公开(公告)号：US20220099159A1

公开(公告)日：2022-03-31

申请号：US17428492

申请日：2020-01-15

申请人： NSK Ltd.

发明人： Ryou OOSAWA ,  Satoshi ISHIKURI ,  Haruhiko KIYOTA ,  Souta MATSUMOTO ,  Toru ISHII ,  Hiroyuki SUGAWARA

IPC分类号： F16H1/16 ,  F16H57/022 ,  F16H57/12 ,  B62D5/04

摘要： 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.

公开(公告)号：US20190211884A1

公开(公告)日：2019-07-11

申请号：US16323942

申请日：2017-08-07

申请人： NSK LTD.

发明人： Toru ISHII ,  Toru SEGAWA ,  Ryou OOSAWA ,  Nobuyuki NISHIMURA

IPC分类号： F16D3/74 ,  F16H1/16 ,  B62D5/04

CPC分类号： F16D3/74 ,  B62D5/0403 ,  B62D5/0409 ,  F16D3/68 ,  F16H1/16 ,  F16H55/24

摘要： 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.

公开(公告)号：US20180080502A1

公开(公告)日：2018-03-22

申请号：US15564473

申请日：2016-04-15

申请人： NSK LTD.

发明人： Ryou OOSAWA

IPC分类号： F16D1/02 ,  F16D1/10 ,  F16H1/16

CPC分类号： F16D1/02 ,  B62D5/0409 ,  F16D1/10 ,  F16D3/18 ,  F16D2001/103 ,  F16H1/16

摘要： A drive-side concavo-convex part (26, 26a) is made to engage the half of a cup-side concavo-convex part (35) which is on the other side in the axial direction, while the central axes of a drive shaft (12a) and a driven shaft (8a) are aligned with each other, and drive-side gaps (36, 36a), the width of which in the circumferential direction increases toward the other side in the axial direction, are interposed between the circumferential side surface of each drive-side convex part (25, 25a) and the circumferential side surface of each cup-side convex part (34). In addition, a driven-side concavo-convex part (32, 32a) is made to engage the half of the cup-side concavo-convex part (35) which is on the one side in the axial direction, while the central axes of the drive shaft (12a) and the driven shaft (8a) are aligned with each other, and driven-side gaps (37, 37a), the width of which in the circumferential direction increases toward the one side in the axial direction, are interposed between the circumferential side surface of each driven-side convex part (31, 31a) and the circumferential side surface of each cup-side convex part (34).

公开(公告)号：US20180066713A1

公开(公告)日：2018-03-08

申请号：US15561237

申请日：2016-04-27

申请人： NSK LTD.

发明人： Ryou OOSAWA ,  Nobuyuki NISHIMURA

IPC分类号： F16D3/58 ,  F16H55/24

摘要： 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.