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公开(公告)号：US11946536B2
公开(公告)日：2024-04-02
申请号：US17639630
申请日：2020-10-30
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Norio Shirokoshi , Satoshi Kishi , Yoshihide Kiyosawa
IPC: F16H49/00
CPC classification number: F16H49/001 , F16H2049/003
Abstract: A three-dimensional tooth profile of internal teeth in a strain wave gearing is a basic internal-teeth tooth profile at an internal-teeth outer end, and is a reduced tooth profile, in which the basic internal-teeth tooth profile is proportionally reduced only in the lateral direction, at other tooth-trace-direction positions. A three-dimensional tooth profile of external teeth is a basic external-teeth tooth profile at an external-teeth outer end, and is an increased tooth profile, in which the basic external-teeth tooth profile is proportionally increased only in the lateral direction, at other tooth-trace-direction positions. Tooth cutting process becomes easier than when only the external teeth employ a three-dimensional tooth profile. Since the tooth profiles, which are proportionally reduced and increased only in the lateral direction along the tooth trace direction, are employed, it is further easier in tooth cutting process.
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公开(公告)号：US11168775B2
公开(公告)日：2021-11-09
申请号：US16753394
申请日：2018-09-20
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yoshihide Kiyosawa , Norio Shirokoshi
Abstract: In a unit-type strain wave gearing, a rotating-side member, which is constituted by a second internally toothed gear and an output shaft is supported, via a first sliding bearing and a second sliding bearing, on a fixed-side member so as to be capable of relative rotation, the fixed-side member being constituted by a unit housing and a first internally toothed gear. Sliding bearing surfaces of the first sliding bearing and sliding bearing surfaces of the second sliding bearing are defined by a conic surface having a central axis line as a center line. It is possible to realize a unit-type strain wave gearing which is advantageous in making smaller and more compact than when a roller bearing is used. It is also easier to adjust the gap between the sliding bearing surfaces because a radial sliding bearing having no function to adjust the radial gap is obviated.
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公开(公告)号：US11002348B2
公开(公告)日：2021-05-11
申请号：US16607757
申请日：2017-06-21
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yoshihide Kiyosawa
Abstract: A rotary actuator has a hollow motor and hollow reduction gears arranged coaxially on either side of the hollow motor. A rotary shaft is arranged so as to pass through a hollow motor shaft of the hollow motor. The hollow reduction gears have hollow input shafts connected to the shaft ends on either sides of the hollow motor shaft. The hollow reduction gears have hollow output shafts connected to sections of the rotary shaft protruding from both ends of the hollow motor shaft. The connection position of the hollow output shaft with respect to the rotary shaft can be adjusted in the rotational direction. A load is rotationally driven by the rotary shaft. By increasing the axial length of the hollow motor, it is possible to obtain a small-diameter rotary actuator having a rotational output with large torque.
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公开(公告)号：US10400666B2
公开(公告)日：2019-09-03
申请号：US15578432
申请日：2016-04-22
Inventor： Ryosuke Hiyoshi , Yoshiaki Tanaka , Yoshihide Kiyosawa , Jun Handa , Kishiro Nagai , Junichiro Onigata , Yoshihiko Yamada
Abstract: A variable compression ratio mechanism for an internal combustion engine includes a gear reducer that varies an engine compression ratio. The gear reducer includes an input-side member connected to a rotation shaft of the actuator; an output-side member that transmits a reduced rotation of the actuator to the control shaft; a fixed member fixed to a housing of the actuator; and an intermediate member that transmits torque from the input-side member to the output-side member and the fixed member, and has a first gear portion engaged with the fixed member and a second gear portion engaged with the output-side member. A ratio of a number of teeth of the fixed gear portion to a number of teeth of the first gear portion is higher than a ratio of a number of teeth of the output-side gear portion to a number of teeth of the second gear portion.
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公开(公告)号：US10309513B2
公开(公告)日：2019-06-04
申请号：US15327866
申请日：2015-07-03
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yoshihide Kiyosawa , Jun Handa , Noboru Takizawa , XinYue 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 the theoretical values of the radial flexing amounts at major-axis positions of the first and second external teeth flexed into the ellipsoidal shape are expressed by d1=m1n1 and d2=m2n2 (m1 and m2 represent the modules of the first and second external teeth, and n1 and n2 represent positive integers), the radial flexing amounts of the first and second external teeth flexed by the wave generator satisfy d1a=ωd1 and d2a=ωd2, where 1.25≤ω≤3. Accordingly, a dual-type strain wave gearing can be achieved with which the first and second external teeth having different numbers can be suitably flexed to form excellent mating states with respective internally toothed gears.
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Patent Agency Ranking
公开(公告)号：US10253863B2
公开(公告)日：2019-04-09
申请号：US15327841
申请日：2015-07-03
Applicant: Harmonic Drive Systems Inc.
Inventor： Yoshihide Kiyosawa , Jun Handa , XinYue 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 tooth depth of tooth profiles of the first external teeth having a low teeth number is smaller than the tooth depth of tooth profiles of the second external teeth having a high teeth number. 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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公开(公告)号：US09797497B2
公开(公告)日：2017-10-24
申请号：US14906861
申请日：2013-07-25
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yoshitomo Mizoguchi , Yoshihide Kiyosawa
IPC: F16H49/00
CPC classification number: F16H49/001
Abstract: A flat strain wave gearing device equipped with: a first internal gear and a second internal gear; a flexible tubular external gear; and an elliptically shaped wave generator. In the direction of a central axis, the center of support of the external teeth by the wave generator is offset, by an offset amount of Δ along the direction of the central axis, with respect to the tooth-width center of the external teeth of the external gear. By setting the offset direction and the offset amount appropriately it is possible to achieve a strain wave gearing device which is suitable in terms of the operating conditions and the mechanical characteristics of the first and second internal gears.
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公开(公告)号：US09709151B2
公开(公告)日：2017-07-18
申请号：US14437213
申请日：2013-09-11
Applicant: Harmonic Drive Systems Inc.
Inventor： Junichi Kurogi , Yoshihide Kiyosawa
IPC: F16H49/00
CPC classification number: F16H49/001 , Y10T74/19
Abstract: A wave generator of a strain wave gearing has a plug, a wave generator bearing mounted to an outer peripheral surface of the plug, an input shaft protruding from the center of the plug to a first side running along a center axis, and a bearing arrangement on which a support bearing supporting the input shaft is arranged. Relative to an outer ring end surface of the wave generator bearing that faces the first side, a center-side plug end surface of a plug end surface facing the same direction is in a position withdrawn from the first side toward the opposite direction. The bearing arrangement is provided between the center-side plug end surface and the outer ring end surface encircling the input shaft. The input shaft can be fitted within the width dimension of the wave generator, and a strain wave gearing having a short axial length can be achieved.
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公开(公告)号：US09377096B2
公开(公告)日：2016-06-28
申请号：US14397526
申请日：2013-05-08
Applicant: Harmonic Drive Systems Inc.
Inventor： Tatsuro Hoshina , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16C19/463 , F16C33/4641 , F16H2049/003
Abstract: A wave generator of a strain wave gearing has a rigid plug and a needle roller bearing mounted on the plug external peripheral surface. The plug external peripheral surface has a retainer engaging part for engaging with a retainer that would move in an axis line direction and for restricting the movement thereof along the axis line direction. The retainer has an outer ring engaging part for engaging with an outer ring that would move in the axis line direction and for restricting the movement thereof along the axis line direction. The movements of the retainer and the outer ring can be restricted without providing a separate member. A wave generator of a strain way gearing can be realized, which is provided with a roller bearing capable of restricting the movement of the outer ring with a simple structure.
Abstract translation: 应变波传动装置的波发生器具有安装在插头外周面上的刚性塞子和滚针轴承。 插头外周面具有保持器接合部，用于与将沿轴线方向移动并用于限制其沿着轴线方向的移动的保持器接合。 保持器具有外环接合部分，用于与将在轴线方向上移动并用于限制其沿着轴线方向的移动的外环接合。 可以限制保持器和外圈的移动，而不需要提供单独的构件。 可以实现应变传动装置的波发生器，其具有能够以简单的结构限制外圈的运动的滚子轴承。
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公开(公告)号：US09371900B2
公开(公告)日：2016-06-21
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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