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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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公开(公告)号：US10145459B2
公开(公告)日：2018-12-04
申请号：US15124788
申请日：2014-03-11
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Masaru Kobayashi , Tatsuro Hoshina
Abstract: The wave generator of the strain wave gear device comprises: a rigid plug; a roller bearing fitted on the elliptical outer circumferential surface thereof; and first and second cylindrical springs, which press loose rollers that have some play in the radial direction between the outer race and the inner race of the roller bearing against the outer raceway surface. The loose rollers are pressed against the outer raceway surface with a linear contact and roll according to the outer raceway surface. Skewing of the rollers is limited, ensuring smooth rotation of the roller bearing.
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公开(公告)号：US10132370B2
公开(公告)日：2018-11-20
申请号：US15321776
申请日：2014-06-24
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Naoki Kanayama
IPC: F16D59/02 , F16D55/30 , H02K7/106 , F16D65/02 , F16D121/14 , F16D121/22 , F16D55/00
Abstract: In a non-excitation operative brake, a friction plate faces the inner disk part of an attraction plate made from a magnetic material, and an electromagnet faces the outer disk part of the attraction plate. A part for generating a brake force acting on a hollow shaft is located on an inner circumferential side in a radial direction of the attraction plate, while a part for magnetically attracting the attraction plate so as to release the brake force is located on an outer circumferential side in the radial direction of the attraction plate. A flat non-excitation operative brake having a reduced length in the direction of an axis line can be realized.
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公开(公告)号：US10066724B2
公开(公告)日：2018-09-04
申请号：US15101179
申请日：2015-02-26
Applicant: Harmonic Drive Systems Inc.
Inventor： Masaru Kobayashi
Abstract: In a strain wave gearing, external teeth of a flexible externally toothed gear are elastically deformable in a direction in which the tooth thickness of the external teeth decreases. Engagement between internal teeth of a first and a second rigid internally toothed gears and the external teeth is set in an overlapping state in which the external teeth elastically deform and engage in a state in which no gap is present. The tooth profile of the internal teeth is a corrected tooth profile so that no interference occurs between a tooth top portion of the internal teeth and a dedendum portion of the external teeth when the teeth are engaged in the overlapping state. A strain wave gearing capable of minimizing or eliminating tooth engagement backlash is realized.
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Patent Agency Ranking
公开(公告)号：US20180187764A1
公开(公告)日：2018-07-05
申请号：US15740183
申请日：2015-07-07
Applicant: Harmonic Drive Systems Inc.
Inventor： Jun HANDA , Hiroaki KIMURA , Sotaro MIYAKE
CPC classification number: F16H49/001 , F16C19/16 , F16C33/38 , F16C2361/61
Abstract: A wave generator of a flat-type strain wave gearing has an insertion member disposed between two wave bearings. The insertion member is pressed into an elliptical outer peripheral surface of a plug and is fixed thereto by an adhesive. An inner ring contact part of the insertion member is in contact with inner rings of the wave bearings from the direction of a center axis. When the flat-type strain wave gearing is in an operating state, the wave bearings can be prevented from moving relative to the plug in the direction of the center axis by means of thrust force acting on the wave bearings.
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公开(公告)号：US20180180146A1
公开(公告)日：2018-06-28
申请号：US15738172
申请日：2015-07-07
Applicant: Harmonic Drive Systems Inc.
Inventor： Jun HANDA , Hiroaki KIMURA , Sotaro MIYAKE
CPC classification number: F16H35/10 , F16H49/001 , F16H2049/003
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：US20180156313A1
公开(公告)日：2018-06-07
申请号：US15572664
申请日：2015-05-29
Applicant: Harmonic Drive Systems Inc.
Inventor： Norio SHIROKOSHI , Yasushi ONO
IPC: F16H1/28
Abstract: In a planetary gear device series composed of eight kinds of planetary gear devices with gear reduction ratios of 3 to 10, the planetary gear device of each gear reduction ratio uses an internal gear with 108 teeth or a slightly different number of teeth, and the module is common among the planetary gear devices of all gear reduction ratios. The combinations of the sun gear teeth number Za and the internal gear teeth number Zc in the planetary gear device of each reduction ratio are given in Table 1 of this application.
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公开(公告)号：US20180149255A1
公开(公告)日：2018-05-31
申请号：US15576088
申请日：2015-06-23
Applicant: Harmonic Drive Systems Inc.
Inventor： Shoichi ISHIKAWA
CPC classification number: F16H49/001 , F16H55/08 , F16H55/0833 , F16H55/088 , F16H2049/003
Abstract: The dedendum tooth profiles of the internal teeth and external teeth of a strain wave gearing are prescribed by a first homothetic curve BC and a second homothetic curve AC obtained from a curve segment from a point A, at which the angle formed by the tangent to a movement locus Mc when meshing is approximated by rack meshing and the major axis is ΘA, to a low point B. The dedendum tooth profile of the internal teeth is prescribed by a curve formed on the internal teeth in the course of the addendum tooth profile of the external teeth moving from an apex of the movement locus to point A. The dedendum tooth profile of the external teeth is prescribed by a curve formed on the external teeth when the addendum tooth profile of the internal teeth moves from the apex to arrive at point A.
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公开(公告)号：US20180031103A1
公开(公告)日：2018-02-01
申请号：US15550697
申请日：2015-02-13
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Masaru KOBAYASHI
IPC: F16H49/00
CPC classification number: F16H49/001 , H02N2/00
Abstract: A wave generator of a strain wave gearing uses a plurality of solid displacement elements to flex a flexible externally toothed gear into a non-circular shape and partially mesh the externally toothed with a rigid internally toothed gear. The solid displacement elements are obtained by curving a monomorphic or bimorphic type rectangular plate-shaped element into an arc shape and can be deformed from an arc shape to a semispherical shape by energization, the semicircular shape having a smaller radius than the arc radius of the arc shape. A wave generator can be realized, which can bear a large load torque by utilizing changes in rigidity, deformation amount, and deformation force associated with the deformation of the solid displacement elements.
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