公开(公告)号：US11649886B2

公开(公告)日：2023-05-16

申请号：US17282077

申请日：2018-11-22

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Daisuke Orii ,  Syuhei Kobayashi ,  Norio Shirokoshi ,  Hiroshi Yamazaki

IPC: F16H49/00 ,  F16C19/04 ,  F16H1/32

CPC classification number: F16H49/001 ,  F16C19/04 ,  F16H1/32 ,  F16C2361/61

Abstract: An outer-ring lubrication groove pattern formed in an outer-race raceway surface and an inner-race lubrication groove pattern formed in an inner-race raceway surface of a wave generator bearing of a strain wave gearing device are patterns in which linear lubrication grooves having very small widths and depths of several micrometers or less are arranged at fine pitches of several micrometers or less. The inner-race lubrication groove pattern includes a second groove pattern formed in long-axis-side inner-race raceway surface portions to hold the lubricant, and a first groove pattern formed in short-axis-side inner-race raceway surface portions to hold the lubricant and guide the lubricant to the second groove pattern. This configuration improves the contact state between balls and the inner-race and outer-race raceway surfaces of the wave generator bearing, thus reducing the coefficient of friction therebetween.

公开(公告)号：US11486481B2

公开(公告)日：2022-11-01

申请号：US17256774

申请日：2018-08-30

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Syuhei Kobayashi ,  Daisuke Orii ,  Norio Shirokoshi ,  Hiroshi Yamazaki

IPC: F16H49/00 ,  F16C35/06

Abstract: In a wave generator for a strain wave gearing, a plug outer peripheral surface of a rigid wave plug has a non-circular profile and is fixed to an inner-race inner peripheral surface of a wave bearing by press-fitting and using an adhesive. The plug outer peripheral surface is a groove formation surface in which microgrooves are formed as adhesive-retaining grooves that can retain the adhesive. When the wave plug is press-fitted into the wave bearing, the amount of adhesive that is scraped out from therebetween is reduced and the bonding strength therebetween can be increased while also preventing unevenness of the bonding strength.

公开(公告)号：US11603918B2

公开(公告)日：2023-03-14

申请号：US17282055

申请日：2018-11-22

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Daisuke Orii ,  Syuhei Kobayashi ,  Norio Shirokoshi ,  Hiroshi Yamazaki

IPC: F16H57/04 ,  F16H49/00

Abstract: In a strain wave gearing device, fine first and second lubricant-holding grooves for holding lubricant are formed at fine pitches in an outer-race external peripheral surface of a wave generator bearing and an outer-race-contacting internal peripheral surface portion of an externally toothed gear in contact therewith. Fine lubricant-guiding grooves for guiding the lubricant to the outer-race-contacting internal peripheral surface portion are formed at fine pitches in a second internal peripheral surface portion, which adjoins the outer-race-contacting internal peripheral surface portion, of an internal peripheral surface of the externally toothed gear. This configuration improves the contact state between the outer-race-contacting internal peripheral surface portion of the externally toothed gear and the outer-race external peripheral surface, thus suppressing fretting wear occurring in these surfaces.

公开(公告)号：US09046384B2

公开(公告)日：2015-06-02

申请号：US13633071

申请日：2012-10-01

Applicant: Harmonic Drive Systems Inc. ,  Satoshi Kiyono

Inventor： Hiroshi Yamazaki ,  Hiroki Hanaoka ,  Satoshi Kiyono

IPC: G01C17/38 ,  G01D5/244

CPC classification number: G01D5/24452

Abstract: In a self-calibration method of an angle detector, an angle interval between first and second scale reader heads are set, so that a single rotation is not equally divided into an integer number of portions by a value of the angle interval and that a plurality of rotations N are equally divided into M equal portions by the value of the angle interval. Readings by the scale reader heads during N rotations of the divided circle are obtained at a pre-set data sampling interval. From differences in readings by these scale reader heads, data of the sequential two-point method relating to an angle scale error of the divided circle are obtained at the data sampling interval. The scale error of the divided circle at the data sampling interval is calculated by synthesizing the data using the fact that an average of the data for the rotations N reaches approximately zero.

Abstract translation: 在角度检测器的自校准方法中，设置第一和第二刻度读取头之间的角度间隔，使得通过角度间隔的值将单个旋转不等分成整数个部分，并且多个 的旋转N通过角度间隔的值被等分成M等分。 在预先设定的数据采样间隔处获得在划分圆的N个旋转期间通过刻度尺读取头的读数。 由于这些刻度读取头的读数差异，在数据采样间隔获得与分割圆的角度刻度误差有关的连续两点方法的数据。 通过使用旋转数据N的平均值近似为零的事实合成数据来计算数据采样间隔处的分割圆的比例误差。