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Patent Searching and Data


Title:
DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/003902
Kind Code:
A1
Abstract:
This drive device is provided with a first plug, a second plug, and a third plug, which are provided along a peripheral surface of a hollow shaft. The outer peripheral surface of the first plug is provided with a bearing, and the outer peripheral surface of the second plug is provided with a flexible bearing. The radial outside of the hollow shaft is provided with: a first support section having an inner peripheral surface which supports an internal gear; and a second support section for supporting a flexible external gear. The flexible external gear and the internal gear mesh with each other, and the flexible external gear and the internal gear rotate relative to each other because of a difference in the number of the teeth. The outer peripheral surface of the first plug is exactly circular when viewed axially, and the outer peripheral surface of the second plug has an elliptical shape having a major axis with a length greater than the diameter of the first plug, and also having a minor axis. When not mounted on the hollow shaft, the flexible bearing has a circular shape in a plan view and has an inner diameter smaller than the length of the major axis of the second plug. The outer peripheral surface of the third plug at least has a tapered surface at a position overlapping the major axis when viewed axially.

Inventors:
OTSUKA TOMOYUKI (JP)
YONEMURA TAKURO (JP)
WAKABAYASHI TOSHIHARU (JP)
Application Number:
PCT/JP2018/022445
Publication Date:
January 03, 2019
Filing Date:
June 12, 2018
Export Citation:
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Assignee:
NIDEC SHIMPO CORP (JP)
International Classes:
F16H1/32; F16C35/063; F16H57/023
Domestic Patent References:
WO2014091522A12014-06-19
WO2016079876A12016-05-26
Foreign References:
JP2017106626A2017-06-15
JP2017155937A2017-09-07
Attorney, Agent or Firm:
KOHO IP LAW (JP)
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