公开(公告)号：US20190091856A1

公开(公告)日：2019-03-28

申请号：US16102821

申请日：2018-08-14

Applicant: Nidec Corporation

Inventor： Shinji TAKEMOTO ,  Satoshi YAMANE ,  Tomoyoshi YOKOGAWA ,  Masaaki NAKAGAWA ,  Shigekatsu MATSUDA

IPC: B25J9/10 ,  F16H57/12 ,  F16H1/28

Abstract: A transmission includes a first rotating portion, an eccentric body, a bearing, an external gear, an internal gear, carrier pins, and a second rotating portion. The first rotating portion rotates about a central axis. The eccentric body rotates therewith and a distance from the central axis to an outer surface thereof varies circumferentially. The bearing is provided on the eccentric body. The external gear includes through holes and is provided on the bearing. The internal gear is cylindrical, surrounds the central axis, and is disposed radially outside the external gear. The carrier pins are columnar and inserted into the through holes. The second rotating portion, to which upper portions of the carrier pins are fixed, rotates about the central axis. The external and internal gears have different numbers of teeth. The tooth of the external gear farthest from the central axis meshes with the internal gear. The diameters of the carrier pins decrease upward.