公开(公告)号：US20230024110A1

公开(公告)日：2023-01-26

申请号：US17782377

申请日：2020-12-02

Applicant: NSK LTD.

Inventor： Toru ISHII ,  Toru SEGAWA ,  Ryo OSAWA ,  Yuki UCHIYAMA

IPC: B62D5/04 ,  F16D3/68 ,  B62D7/16

Abstract: A torque transmission joint includes a first elastic body having a plurality of first elastic pieces pinched in a circumferential direction between respective first convex portions and a coupling, and a second elastic body having a plurality of second elastic pieces pinched in the circumferential direction between respective second convex portions and the coupling.

公开(公告)号：US20220099159A1

公开(公告)日：2022-03-31

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 ,  F16H57/022 ,  F16H57/12 ,  B62D5/04

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.

公开(公告)号：US20190211884A1

公开(公告)日：2019-07-11

申请号：US16323942

申请日：2017-08-07

Applicant: NSK LTD.

Inventor： Toru ISHII ,  Toru SEGAWA ,  Ryou OOSAWA ,  Nobuyuki NISHIMURA

IPC: F16D3/74 ,  F16H1/16 ,  B62D5/04

CPC classification number: F16D3/74 ,  B62D5/0403 ,  B62D5/0409 ,  F16D3/68 ,  F16H1/16 ,  F16H55/24

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.

公开(公告)号：US20190264751A1

公开(公告)日：2019-08-29

申请号：US16307633

申请日：2017-10-12

Applicant: NSK LTD.

Inventor： Ryou OOSAWA ,  Toru SEGAWA ,  Toru ISHII

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

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.

公开(公告)号：US20170284532A1

公开(公告)日：2017-10-05

申请号：US15508176

申请日：2015-10-08

Applicant: NSK LTD.

Inventor： Toru SEGAWA ,  Toru ISHII

IPC: F16H57/021 ,  F16H1/16 ,  F16H57/023

CPC classification number: F16H57/021 ,  B62D5/0409 ,  F16H1/16 ,  F16H57/023 ,  F16H2057/0213

Abstract: There is provided a method of assembling a worm reducer, which includes causing a worm wheel to be rotatably supported in a wheel accommodation part, externally fitting a pair of bearings at tip-side and base-side positions of a worm, inserting the worm into a worm accommodation part from an opening side thereof at a state where the worm is offset outward in a radial direction of the worm wheel with respect to a center axis of the worm accommodation part, causing the bearing which is externally fitted to a leading side in an insertion direction of the worm to pass an outer diameter-side of a part of an outer peripheral edge of the worm wheel, which protrudes most into the worm accommodation part, causing the worm teeth to mesh with the worm wheel, and further inserting the worm to a predetermined position in the worm accommodation part.

公开(公告)号：US20190234505A1

公开(公告)日：2019-08-01

申请号：US16331199

申请日：2017-09-20

Applicant: NSK LTD.

Inventor： Toru ISHII ,  Toru SEGAWA

IPC: F16H57/021 ,  F16H1/16 ,  B62D5/04 ,  F16H57/039 ,  F16H57/031

CPC classification number: F16H57/021 ,  B62D5/0403 ,  B62D5/0409 ,  F16H1/16 ,  F16H55/24 ,  F16H57/031 ,  F16H57/039 ,  F16H57/0498 ,  F16H2057/0213

Abstract: A worm reducer includes: a housing including a wheel accommodating portion, and a worm accommodating portion; a worm wheel including wheel teeth disposed on an outer circumferential surface and rotatably supported inside the wheel accommodating portion; and a worm including worm teeth disposed on an outer circumferential surface to mesh with the wheel teeth and rotatably supported inside the worm accommodating portion, wherein a proximal end portion of the worm is connected to a drive shaft such that torque can be transmitted. An inner circumferential surface of the worm accommodating portion includes a housing side step surface which faces a proximal end side in an axial direction of the worm. An outer circumferential surface of the worm includes a worm side step surface which closely faces the housing side step surface in the axial direction at a portion axially deviated from a portion where the worm teeth are disposed.

公开(公告)号：US20170297610A1

公开(公告)日：2017-10-19

申请号：US15508367

申请日：2015-04-24

Applicant: NSK LTD.

Inventor： Toru ISHII

IPC: B62D5/04 ,  F16D3/58 ,  F16H1/16 ,  F16H57/12 ,  F16H57/00

CPC classification number: B62D5/0409 ,  B60Y2306/09 ,  B62D5/04 ,  F16D3/18 ,  F16D3/58 ,  F16H1/16 ,  F16H57/0006 ,  F16H57/12

Abstract: There is provided a torque transmission joint configured to transmit torque between end portions of a driving shaft and a driven shaft arranged in series in an axial direction. An outer-diameter-side concave-convex portion is formed on an inner periphery of one shaft of the driving shaft and the driven shaft or a member fixed to the one shaft, an inner-diameter-side concave-convex portion is formed on an outer periphery of the other shaft or a member fixed to the other shaft, and the outer-diameter-side concave-convex portion and the inner-diameter-side concave-convex portion are engaged with a circumferential gap being interposed therebetween. An elastic member is provided between the end portion of the driving shaft and the end portion of the driven shaft either directly or via another member such that torque can be transmitted between the driving shaft and the driven shaft.