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：US20190285157A1

公开(公告)日：2019-09-19

申请号：US16318575

申请日：2017-07-18

Applicant: NSK LTD.

Inventor： Toru SEGAWA ,  Toru ISHll ,  Souta MATSUMOTO

IPC: F16H55/22 ,  F16H1/16

Abstract: Disclosed herein is a worm reduction gear, including: an inner diameter side holder in which a bearing is internally fitted and held; an outer diameter side holder which includes a holder holding part in which the inner diameter side holder is internally fitted and held so as to be able to be relatively rotated and moved and to be displaced in a direction orthogonal to a center axis of a worm wheel and a center axis of a worm, and which is internally fitted and held in a holding recessed part of a housing; and an elastic urging member in a circumferential direction which elastically urges the inner diameter side holder against the outer diameter side holder in a direction of rotating in the circumferential direction. When the inner diameter side holder rotates in the circumferential direction with respect to the outer diameter side holder, an outer circumferential surface of the inner diameter side holder and an inner circumferential surface of the outer diameter side holder are formed so that the bearing is displaced in the direction orthogonal to the center axis of the worm wheel and the center axis of the worm.