公开(公告)号：US20210341048A1

公开(公告)日：2021-11-04

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：US20210372515A1

公开(公告)日：2021-12-02

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 ,  F16H1/32 ,  F16C19/04

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：US20210140531A1

公开(公告)日：2021-05-13

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：US20150240930A1

公开(公告)日：2015-08-27

申请号：US14611304

申请日：2015-02-02

Applicant: Harmonic Drive Systems Inc.

Inventor： Masaru KOBAYASHI ,  Daisuke ORII

IPC: F16H55/08 ,  C21D9/32 ,  C21D8/00 ,  C21D6/00 ,  C22C38/04 ,  C22C38/38 ,  C22C38/34 ,  C22C38/22 ,  F16H55/06 ,  C22C38/02

CPC classification number: F16H55/0833 ,  C21D1/22 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/005 ,  C21D9/32 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  F16H55/06 ,  F16H2049/003

Abstract: A method for manufacturing a flexible externally toothed gear includes: a first step (ST1) for producing a primary molded article by performing near-net-shape plastic working on a material comprising a nickel-free low-alloy steel having a silicon content of 1.45-1.5 wt %; a second step (ST2) for martempering the primary molded article; a third step (ST3) for producing a secondary molded article from the primary molded article; and a fourth step (ST4) for shot-peening the secondary molded article to change the surface portions of the tooth part and other parts to martensite. A flexible externally toothed gear can be obtained in which the surface hardness is kept within a prescribed range and the fatigue strength and abrasion resistance are high.

Abstract translation: 制造柔性外齿轮的方法包括：第一步骤（ST1），用于通过对包含硅含量为1.45的无镍低合金钢的材料进行近净形塑性加工来制造一次成型制品 -1.5重量％ 用于对一次成型品进行捣碎的第二工序（ST2） 用于从一次成型品制造二次成型品的第三工序（ST3） 和第二工序（ST4），其用于对二次成型体进行喷丸处理，将齿部等部分的表面部分变为马氏体。 可以获得其中表面硬度保持在规定范围内并且疲劳强度和耐磨性高的柔性外齿齿轮。

公开(公告)号：US20230093559A1

公开(公告)日：2023-03-23

申请号：US17759290

申请日：2020-04-10

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Daisuke ORII ,  Syuhei KOBAYASHI

IPC: F16H57/029 ,  F16H49/00 ,  F16H57/04

Abstract: A strain wave gearing has a lubricant sealing structure that prevents a lubricant from leaking to the outside through a gap portion between a hollow input shaft and an end plate. The lubricant sealing structure includes an oil-repellent surface formed on the surface portion facing the gap portion, an oil seal that seals the gap portion, and an oil film forming surface formed at a lip tip surface of the oil seal. The oil-repellent surface has a surface texture in which first fine grooves are formed in a predetermined pattern so that an oil-repellent effect can be obtained with respect to the lubricant. The oil film forming surface has a surface texture in which second fine grooves are formed in a predetermined pattern so that an oil film forming effect of a seal lip grease can be obtained.