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公开(公告)号：US11280370B2
公开(公告)日：2022-03-22
申请号：US16346941
申请日：2018-08-30
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Hiroaki Kimura , Jun Handa
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. Where L1 is the maximum width of the gap, t1 is a depth from the tooth top land of the first external teeth to the deepest part of the gap, h1 is the tooth depth of the first external teeth, t2 is a depth from the tooth top land of the second external teeth to the deepest part, and h2 is the tooth depth of the second external teeth, any one of the following conditions 1 to 3 is satisfied: L1=0.1L−0.35L, t1=0.9h1−1.3h1, and t2=0.3h2−0.9h2 Condition 1: L1=0.1L−0.35L, t1=0.3h1−0.9h1, and t2=0.9h2−1.3h2 Condition 2: L1=0.1L−0.35L, t1=0.3h1−0.9h1, and t2=0.3h2−0.9h2 Condition 3: It is possible to obtain a dual-type strain wave gearing in which wear resistance and tooth bottom fatigue strength are increased.
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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：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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公开(公告)号：US11441650B2
公开(公告)日：2022-09-13
申请号：US17076194
申请日：2020-10-21
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Jun Handa , Hiroaki Kimura , Sotaro Miyake
Abstract: In a rotation transmission mechanism that transmits the rotational driving force of a motor to a load-side member via a speed reducer, a strain wave gearing is used as the speed reducer, and the allowable load torque of members in the powertrain other than the strain wave gearing is greater than a predetermined upper-limit load torque. The allowable load torque of the strain wave gearing is dictated by the ratcheting torque, which is set so as not to exceed the upper-limit load torque. In an overload state, ratcheting is generated in the strain wave gearing, so that the strain wave gearing functions as a mechanical fuse. Other power transmission members can be protected from an overload state without adding a separate member such as a torque limiter.
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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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Patent Agency Ranking
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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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：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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公开(公告)号：US12018740B2
公开(公告)日：2024-06-25
申请号：US18170580
申请日：2023-02-17
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Nozomu Tanioka , Jun Handa
CPC classification number: F16H49/001 , F16H2057/0056 , F16H2057/0062
Abstract: A strain wave gearing has three components and a temporary-fixing jig, three components being an internally toothed gear, a cup-shaped externally toothed gear, and a wave generator. The temporary-fixing jig is securely fastened to an output shaft fixed to the externally toothed gear by a temporary-fixing bolt and is securely fastened to an input shaft fixed to a cam plate of the wave generator by a temporary-fixing bolt. The temporary-fixing jig engages with the output shaft and the input shaft and maintains the three components in an assembled state. There is no need for an operation for adjusting the positions of the three components in an operation for attaching the strain wave gearing to a motor. After the strain wave gearing has been attached to the motor, the temporary-fixing jig is removed from the strain wave gearing, wherefore less space is required for installation.
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公开(公告)号：US10907716B2
公开(公告)日：2021-02-02
申请号：US15753600
申请日：2015-09-17
Applicant: Harmonic Drive Systems Inc.
Inventor： Jun Handa , Sotaro Miyake , Hiroaki Kimura , Hideo Yasue
Abstract: A wave generator for a strain wave gearing makes a flexible externally toothed gear to flex into an elliptical shape and mesh with rigid internally toothed gears, and makes meshing positions of the flexible externally toothed gear with the both gears to move in a circumferential direction. On the inner side of a rigid plug of the wave generator, a plug support ring is secured and integrated. The rigid plug is formed from an iron-based material, and the plug support ring is formed from a high-rigidity material that is more rigid than the iron-based material. Since deformation of the rigid plug is suppressed, the wave generator provided with a large hollow part can be obtained.
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