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公开(公告)号：US11092223B2
公开(公告)日：2021-08-17
申请号：US15322640
申请日：2015-07-03
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Jun Handa , Yoshihide Kiyosawa , Noboru Takizawa , Xin Yue Zhang
Abstract: An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different teeth numbers, and a gap formed between these teeth as a cutter clearance area for tooth cutters. The maximum width L1 of the gap is 0.1 to 0.3 times the width L of the externally toothed gear. The depth from the tooth top land of the first external teeth to the deepest part of the gap is 0.9 to 1.3 times the depth of the first external teeth, and the depth from the tooth top land of the second external teeth to the deepest part of the gap is 0.9 to 1.3 times the depth of the second external teeth. The tooth bottom fatigue strength of the externally toothed gear provided with differing numbers of first and second external teeth is increased.
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公开(公告)号：US10823278B2
公开(公告)日：2020-11-03
申请号：US16493111
申请日：2017-04-10
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Shunichi Tezuka , Yoshihide Kiyosawa , Toshimi Yamagishi
Abstract: A silk hat-type strain wave gear device has a crossed roller bearing for supporting an internal gear and an external gear so as to allow relative rotation. A first gap part between the inner and outer rings of said bearing is sealed by an oil seal and a second gap part thereof is in communication with a gear-side gap part on the outside of the external gear. A bearing seal separates the second gap part from the gear-side gap part. The bearing seal prevents excessive inflow of lubricant from the gear-side gap part into the second gap part. Excess lubricant that has flowed into the bearing can flow back from the second gap part to the gear-side gap part. Excess lubricant in the bearing is prevented from leaking through the oil seal to the outside.
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Patent Agency Ranking
公开(公告)号：US09989141B2
公开(公告)日：2018-06-05
申请号：US14901237
申请日：2013-07-04
Applicant: Harmonic Drive Systems Inc.
Inventor： Sotaro Miyake , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16H2049/003
Abstract: A press plate is tacked to a boss of a cup-shaped flexible externally toothed gear of a wave gear device unit. A second arm as a driven member is attached by a fastening bolt to an end surface on an outer side of an output flange of the wave gear device unit. The fastening bolt is screwed into and secured in a tap hole of the press plate from each bolt insertion hole of the second arm, via a flange-side bolt insertion hole and a boss-side bolt insertion hole. A fastening structure can be achieved in which a driven member is fastened to a wave gear device unit in which holes are easily machined into the output flange, and only a few fastening bolts are needed to fasten the boss, the output flange, and the driven member.
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公开(公告)号：US09341252B2
公开(公告)日：2016-05-17
申请号：US14425679
申请日：2013-07-10
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Xin Yue Zhang , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16H1/32 , F16H55/084 , Y10T74/19642
Abstract: A wave generator (5) for a flat-type strain wave gearing (1) has a first elliptical outer circumferential surface (6S) of a first wave generator portion (5S) defined by a first elliptical curve (C1), and a second elliptical outer circumferential surface (6D) of a second wave generator section (5D) defined by a second elliptical curve (C2). Compared to using a wave generator for which the contour is defined by a single elliptical curve, differences between the ball load distribution of the first wave generator portion (5S) and the ball load distribution of the second wave generator portion (5D) can be suppressed, both ball load distributions can be equalized, and the equivalent ball load can be reduced; therefore, an increase in the lifespan of the wave generator bearing can be achieved.
Abstract translation: 用于扁平型应变波传动装置（1）的波发生器（5）具有由第一椭圆曲线（C1）限定的第一波发生器部分（5S）的第一椭圆形外周表面（6S）和第二椭圆形 由第二椭圆曲线（C2）限定的第二波发生器部分（5D）的外圆周表面（6D）。 与使用由单个椭圆曲线限定轮廓的波发生器相比，可以抑制第一波发生器部分（5S）的球负载分布与第二波发生器部分（5D）的球载荷分布之间的差异 可以均衡两个球载荷分布，可以减小等效球载荷; 因此，可以实现波发生器轴承的寿命的增加。
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公开(公告)号：US20160025203A1
公开(公告)日：2016-01-28
申请号：US14396504
申请日：2013-05-08
Applicant: Harmonic Drive Systems Inc.
Inventor： Tatsuro HOSHINA , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16C19/06 , F16C19/44 , F16C19/46 , F16C19/54 , F16C19/55 , F16C41/001 , F16H2049/003
Abstract: A wave generator of a hollow strain wave gearing has a rigid plug and a needle roller bearing. The needle roller bearing has an inner ring trajectory surface formed in the plug external peripheral surface, a flexible outer ring, an outer ring trajectory surface formed in an inner peripheral surface of the outer ring, and needle rollers. An inner ring trajectory groove is formed in the plug external peripheral surface, and the inner ring trajectory surface is formed in a groove bottom surface of the inner ring trajectory groove. Inner-ring-side restricting surfaces for restricting the needle rollers from moving in the center axis direction are formed in groove side surfaces on both sides of the inner ring trajectory groove. A wave generator can be obtained, which is suitable for increasing the hollow diameter of a strain wave gearing.
Abstract translation: 中空应变波传动装置的波发生器具有刚性塞子和滚针轴承。 滚针轴承具有形成在插塞外周面中的内环轨迹面，柔性外圈，形成在外圈内周面的外圈轨迹面以及滚针。 内圈轨迹槽形成在插塞外周面上，内圈轨迹面形成在内圈轨迹槽的槽底面。 在内圈轨迹槽的两侧的槽侧面形成有用于限制针辊在中心轴方向移动的内圈侧限制面。 可以获得波浪发生器，其适用于增加应变波传动装置的中空直径。
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公开(公告)号：US20150300475A1
公开(公告)日：2015-10-22
申请号：US14398749
申请日：2013-06-20
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yuya Murayama , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16H57/029 , F16H57/0454 , F16H2057/02073
Abstract: A hollow-type strain wave gearing unit (1) has a sealing member (14) for sealing a gap (15) opening to the inner peripheral surface of a unit hollow portion (5) passing through in an axis (1a) direction. The gap (15) includes a gap section (15b) between an outer peripheral side end race (48b) on the wave generator side and a boss side end face (108), both faces opposing each other in the axis (1a) direction, and the sealing member (14) is assembled therein. The gap section (15b) is formed in a state partially entering the inside of the inner ring (11b) of the second bearing (11) supporting the wave generator (4). It is possible to realize a hollow-type strain wave gearing unit with a sealing mechanism that is suitable for increasing the inner diameter of the unit hollow portion and for reducing the unit axial length.
Abstract translation: 中空型应变波传动单元（1）具有密封部件（14），该密封部件（14）用于密封通向沿轴线（1a）方向通过的单元中空部分（5）的内周面的间隙（15）。 间隙（15）包括在波浪发生器侧的外周侧端部座圈（48b）和凸起侧端面（108）之间的沿轴线（1a）方向相对的两个面的间隙部（15b） 并且密封构件（14）组装在其中。 间隙部（15b）形成为部分地进入支撑波发生器（4）的第二轴承（11）的内圈（11b）的内部的状态。 可以实现具有密封机构的中空型应变波传动单元，该密封机构适于增加单元中空部分的内径并减小单元轴向长度。
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公开(公告)号：US20150226302A1
公开(公告)日：2015-08-13
申请号：US14429704
申请日：2013-07-01
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Jun Handa , Yoshihide Kiyosawa
IPC: F16H49/00 , F16H57/021
CPC classification number: F16H49/001 , F16H57/021 , F16H2049/003 , Y10T74/19647 , Y10T74/1987
Abstract: A first shaft end of a hollow shaft of a hollow strain wave gearing is supported by a first support bearing with a collar interposed therebetween which is mounted to the outer-circumferential surface of the first shaft end. A second shaft end on the other end of the hollow shaft is supported by a second support bearing. A wave plug of a wave generator is integrally formed with the hollow shaft, and a wave bearing is mounted on the elliptical outer-circumferential surface thereof from the first-shaft-end side. It is possible to use a first support bearing having an inner diameter larger than the outer diameter of the first shaft end as the first support bearing for supporting the first shaft end.
Abstract translation: 中空应变波传动装置的中空轴的第一轴端由第一支撑轴承支撑，其中插入有轴环，其安装到第一轴端的外周表面。 中空轴的另一端的第二轴端由第二支撑轴承支撑。 波浪发生器的波形塞与中空轴一体形成，波浪轴承从第一轴端侧安装在椭圆形外周面上。 可以使用具有大于第一轴端的外径的内径的第一支撑轴承作为用于支撑第一轴端的第一支撑轴承。
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