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公开(公告)号：US20150219200A1
公开(公告)日：2015-08-06
申请号：US14425679
申请日：2013-07-10
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Xin Yue Zhang , Yoshihide Kiyosawa
IPC: F16H49/00
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：US20210324948A1
公开(公告)日：2021-10-21
申请号：US16328789
申请日：2017-09-07
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Xin Yue Zhang , Yoshihide Kiyosawa
Abstract: A strain wave gearing has a wave generator provided with a rigid plug and a wave bearing. The wave bearing is of a deep groove bearing type and is mounted on an elliptical outer circumferential surface of the rigid plug, whereby outer race and inner race thereof are flexed into an elliptical shape. Where D is a ball diameter of the balls, Ro is a raceway-surface radius of the outer race, Ri is a raceway-surface radius of the inner race, Ro/D is an outer-race conformity, and Ri/D is an inner-race conformity, the outer-race conformity Ro/D is greater than the inner-race conformity Ri/D. The friction torque of the wave bearing can be reduced while maintaining the practical service life thereof to be the same level as in a conventional one.
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公开(公告)号：US10890239B2
公开(公告)日：2021-01-12
申请号：US16348884
申请日：2016-11-30
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Noboru Takizawa , Xin Yue Zhang
Abstract: In a silk hat-shaped external gear for a strain wave gearing, t(A)>t(C)>t(D)>t(B) is satisfied, where the thicknesses of the inner circumferential end (A), the middle part (B) and the outer circumferential end (C) of the diaphragm body portion of a diaphragm are t(A), t(B) and t(C), and where the thickness of the barrel-side end part (D) of the curved portion of the diaphragm is t(D). With reference to the thickness of the middle part (B), the thickness of the inner circumferential end (A) of the diaphragm is set so as to be thicker than conventional silk hat-shaped external gears. It is possible to realize an externally toothed gear capable of preventing diaphragm rupture due to thrust force at high load torque and having high fatigue strength.
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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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Patent Agency Ranking
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：US10393227B2
公开(公告)日：2019-08-27
申请号：US15500605
申请日：2014-08-06
Applicant: Harmonic Drive Systems Inc.
Inventor： Jun Handa , Yoshihide Kiyosawa , Noboru Takizawa , Xin Yue Zhang
Abstract: A relieving portion is formed between a first external tooth portion and a second external tooth portion in the external teeth of a flexible externally toothed gear of a flat strain wave gearing. The length L1 of the relieving portion in the tooth trace direction is within the range of 0.1 to 0.5 of the tooth width L of the external teeth. The maximum relieving amount t from the tooth top land of an external tooth in the relieving portion is 3.3×10−4
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公开(公告)号：US20190277383A1
公开(公告)日：2019-09-12
申请号：US16348884
申请日：2016-11-30
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Noboru Takizawa , Xin Yue Zhang
IPC: F16H49/00
Abstract: In a silk hat-shaped external gear for a strain wave gearing, t(A)>t(C)>t(D)>t(B) is satisfied, where the thicknesses of the inner circumferential end (A), the middle part (B) and the outer circumferential end (C) of the diaphragm body portion of a diaphragm are t(A), t(B) and t(C), and where the thickness of the barrel-side end part (D) of the curved portion of the diaphragm is t(D). With reference to the thickness of the middle part (B), the thickness of the inner circumferential end (A) of the diaphragm is set so as to be thicker than conventional silk hat-shaped external gears. It is possible to realize an externally toothed gear capable of preventing diaphragm rupture due to thrust force at high load torque and having high fatigue strength.
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公开(公告)号：US10253862B2
公开(公告)日：2019-04-09
申请号：US15322664
申请日：2015-07-03
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yoshihide Kiyosawa , Jun Handa , 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 is flexed into an ellipsoidal shape by a wave generator. When t(1) represents the tooth bottom rim wall thickness of the first external teeth, and t(2) represents the tooth bottom rim wall thickness of the second external teeth, the ratio of t(1)/t(2) is set to a value satisfying 0.5>t(1)/t(2)
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公开(公告)号：US10197145B2
公开(公告)日：2019-02-05
申请号：US15327750
申请日：2015-07-03
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yoshihide Kiyosawa , Jun Handa , Xin Yue Zhang , Noboru Takizawa
Abstract: An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different teeth numbers. The first and second external teeth are flexed by a wave generator by the same flexing amount, into an ellipsoidal shape. The average pressure angle of main-tooth-surface sections of tooth profiles of the first external teeth having a low teeth number is less acute than the average pressure angle of main-tooth-surface sections of tooth profiles of the second external teeth having a high teeth number. Accordingly, a dual-type strain wave gearing can be achieved with which the first and second external teeth having different teeth numbers can be suitably flexed to form excellent meshing states with respective internally toothed gears.
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