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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
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.
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公开(公告)号：US11885403B2
公开(公告)日：2024-01-30
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
CPC classification number: F16H57/029 , F16H49/001 , F16H57/048 , F16H57/0427
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.
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公开(公告)号：US12092221B2
公开(公告)日：2024-09-17
申请号：US17908628
申请日：2020-06-05
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Daisuke Orii , Syuhei Kobayashi
IPC: F16J15/447 , F16H49/00 , F16H57/04 , F16J15/324 , F16J15/44
CPC classification number: F16J15/447 , F16H49/001 , F16H57/0427 , F16H57/048 , F16J15/324 , F16J15/444
Abstract: A strain wave gearing is provided with a lubricant sealing structure that prevents a lubricant from leaking to the outside through a gap between a hollow input shaft and an end plate. The lubricant sealing structure is provided with a labyrinth seal that seals the gap. The labyrinth seal is configured by a plurality of gap portions defined by an oil-repellent surface in which fine grooves are formed in a prescribed groove array pattern. The oil-repellent surface is also formed at an outer peripheral surface portion on an upstream side of the labyrinth seal. Leakage of a lubricant oil to outside of the device can be reliably prevented through the oil-repellent effect of the oil-repellent surface at the upstream side, the sealing effect of the labyrinth seal, and the oil-repellent effect from the oil-repellent surface of the labyrinth seal.
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Patent Agency Ranking
公开(公告)号：US09874273B2
公开(公告)日：2018-01-23
申请号：US14611304
申请日：2015-02-02
Applicant: Harmonic Drive Systems Inc.
Inventor： Masaru Kobayashi , Daisuke Orii
IPC: C21D9/32 , C21D1/22 , F16H55/06 , F16H55/08 , C21D6/00 , C21D8/00 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/34 , C22C38/38 , C21D7/06 , F16H49/00
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.
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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
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.
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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
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.
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公开(公告)号：US09441721B2
公开(公告)日：2016-09-13
申请号：US14646271
申请日：2013-09-12
Applicant: Harmonic Drive Systems Inc.
Inventor： Daisuke Orii , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16H57/0404 , Y10T74/19
Abstract: A strain wave gearing unit is provided with an internal gear, which surrounds the periphery of a cup-shaped external gear, and a bearing. An annular gap is formed between the inner ring of the bearing and the internal gear. The gap communicates with the sliding portions of the bearing and the section where the two gears mesh. An annular filter member made of non-woven fabric is fitted in the gap. Foreign matter such as abrasion powder, which is contained in lubricant that flows in the gap, is trapped by the filter member. The present invention can prevent penetration of abrasion powder generated in the sliding portions into the meshing section via the gap.
Abstract translation: 应变波传动单元设置有围绕杯形外齿轮的周边的内齿轮和轴承。 在轴承的内圈和内齿轮之间形成环形间隙。 间隙与轴承的滑动部分和两个齿轮啮合的部分连通。 由无纺布制成的环形过滤构件安装在间隙中。 在间隙中流动的润滑剂中所含的诸如磨损粉末的异物被过滤构件捕获。 本发明可以防止在滑动部分中产生的磨损粉末经由间隙渗透到啮合部分中。
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公开(公告)号：US20150285357A1
公开(公告)日：2015-10-08
申请号：US14646271
申请日：2013-09-12
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Daisuke Orii , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16H57/0404 , Y10T74/19
Abstract: A strain wave gearing unit is provided with an internal gear, which surrounds the periphery of a cup-shaped external gear, and a bearing. An annular gap is formed between the inner ring of the bearing and the internal gear. The gap communicates with the sliding portions of the bearing and the section where the two gears mesh. An annular filter member made of non-woven fabric is fitted in the gap. Foreign matter such as abrasion powder, which is contained in lubricant that flows in the gap, is trapped by the filter member. The present invention can prevent penetration of abrasion powder generated in the sliding portions into the meshing section via the gap.
Abstract translation: 应变波传动单元设置有围绕杯形外齿轮的周边的内齿轮和轴承。 在轴承的内圈和内齿轮之间形成环形间隙。 间隙与轴承的滑动部分和两个齿轮啮合的部分连通。 由无纺布制成的环形过滤构件安装在间隙中。 在间隙中流动的润滑剂中所含的诸如磨损粉末的异物被过滤构件捕获。 本发明可以防止在滑动部分中产生的磨损粉末经由间隙渗透到啮合部分中。
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