公开(公告)号：US09934799B2

公开(公告)日：2018-04-03

申请号：US15366342

申请日：2016-12-01

申请人： SEIKO INSTRUMENTS INC.

发明人： Akihiro Iino ,  Masami Oaku ,  Takayuki Kosaka

IPC分类号： G11B5/48 ,  F16C19/06 ,  F16C19/16 ,  F16C33/38 ,  F16C33/60 ,  F16C33/78 ,  F16C43/06

CPC分类号： G11B5/4813 ,  F16C19/06 ,  F16C19/163 ,  F16C19/166 ,  F16C33/3806 ,  F16C33/416 ,  F16C33/60 ,  F16C33/7806 ,  F16C33/7886 ,  F16C43/065 ,  F16C2370/12

摘要： A bearing device includes a shaft and a roller bearing externally inserted over the shaft. The roller bearing includes an inner ring disposed coaxially with a center axis of the shaft, an outer ring surrounding the inner ring from an outer side in a radial direction, and a plurality of rolling elements held between the inner ring and the outer ring to be capable of rolling. The inner ring is divided into one half section and the other half section. The one half section contacts the rolling elements from the one side toward the other side in the axial direction, and the other half section contacts the rolling elements from the other side toward the one side in the axial direction. Preloads are applied to the two half sections in directions in which the one half section and the other half section are brought close to each other.

公开(公告)号：US11446433B2

公开(公告)日：2022-09-20

申请号：US16703363

申请日：2019-12-04

申请人： Seiko Instruments Inc.

发明人： Yoichi Endo ,  Akehiko Sato ,  Masami Oaku ,  Shinichi Asai

IPC分类号： A61M5/145 ,  A61M5/142 ,  A61M5/315

摘要： A feeding device according to the present invention includes a tubular body which has an a female screw portion, a movable shaft which has a male screw portion and is movable between a start position and an end position according to a rotation of the tubular body, a final gear which is provided in the tubular body, a drive unit which has the driving gear, a power transmission mechanism which transmits a driving force from the driving gear to the final gear via a plurality of intermediate gears, and a biasing mechanism which is configured to apply a biasing force to the movable shaft. At least one of the plurality of intermediate gears is a two-stage gear. The biasing mechanism is configured to apply the biasing force from the end position toward the start position and presses the male screw portion against the female screw portion to the start position side.