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公开(公告)号：US20180363750A1
公开(公告)日：2018-12-20
申请号：US15781751
申请日：2015-12-11
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Jun HANDA , Hiroaki KIMURA , Sotaro MIYAKE
IPC: F16H49/00 , F16H57/021
Abstract: A restraint mechanism for limiting the movement of the flexible external gear of a flat strain wave gearing in the axial direction has a first restraining member installed in a floating state in a first recess and a second restraining member installed in a floating state in a second recess. The restraining member is able to limit the movement of the flexible external gear in the axial direction to a range in which there are no difficulties during actual use. Moreover, compared with when movement of the flexible external gear is limited using members that are disposed at fixed positions, it is possible to reduce the sliding abrasion that occurs between the flexible external gear and the first and second restraining members.
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公开(公告)号：US20180245678A1
公开(公告)日：2018-08-30
申请号：US15753600
申请日：2015-09-17
Applicant: Harmonic Drive Systems Inc.
Inventor： Jun HANDA , Sotaro MIYAKE , Hiroaki KIMURA , Hideo YASUE
CPC classification number: F16H49/001 , F16H1/00
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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公开(公告)号：US20210404544A1
公开(公告)日：2021-12-30
申请号：US17191775
申请日：2021-03-04
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Hiroaki KIMURA , Yoshihide KIYOSAWA , Jun HANDA
IPC: F16H49/00 , F16H57/021
Abstract: A strain wave gearing unit has a unit housing, a strain wave gearing, and a bearing device. Balls of a bearing part of the bearing device are positioned on the diametrically outer side with respect to a cylindrical barrel part of an externally toothed gear. The diameter S of the balls is 0.05 to 0.15 times the pitch diameter D of the externally toothed gear. The centers of the balls are positioned between a point at a distance of 1.2 times the diameter S toward the cylindrical-barrel-part side from an inner-side end surface of a diaphragm along a center axis and a point at a distance of 1 times the diameter S toward a side opposite the cylindrical barrel part from the inner-side end surface. The bearing device can be configured to be used in common for strain wave gearing units having different axial lengths.
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公开(公告)号：US20210033178A1
公开(公告)日：2021-02-04
申请号：US17076364
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：US20210033177A1
公开(公告)日：2021-02-04
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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Patent Agency Ranking
公开(公告)号：US20230035665A1
公开(公告)日：2023-02-02
申请号：US17964081
申请日：2022-10-12
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Hiroaki KIMURA , Yoshihide KIYOSAWA , Jun HANDA
IPC: F16H49/00 , F16H57/021
Abstract: A strain wave gearing unit has a unit housing, a strain wave gearing, and a bearing device. Balls of a bearing part of the bearing device are positioned on the diametrically outer side with respect to a cylindrical barrel part of an externally toothed gear. The diameter S of the balls is 0.05 to 0.15 times the pitch diameter D of the externally toothed gear. The centers of the balls are positioned between a point at a distance of 1.2 times the diameter S toward the cylindrical-barrel-part side from an inner-side end surface of a diaphragm along a center axis and a point at a distance of 1 times the diameter S toward a side opposite the cylindrical barrel part from the inner-side end surface. The bearing device can be configured to be used in common for strain wave gearing units having different axial lengths.
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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：US20200056653A1
公开(公告)日：2020-02-20
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：US20180320770A1
公开(公告)日：2018-11-08
申请号：US15772277
申请日：2015-11-17
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Jun HANDA , Hiroaki KIMURA , Sotaro MIYAKE
IPC: F16H49/00
CPC classification number: F16H49/001 , F16H1/32 , F16H2049/003
Abstract: A foreign-matter intrusion preventing mechanism of a strain wave gearing is provided with a filter attachment plate attached to a wave generator plug and a filter attached to the ellipsoidal outer peripheral surface of the filter mounting plate. Lubricant flows, via the filter, between a wave generator bearing and a meshing portion between an external gear and an internal gear. Foreign matters included in the lubricant are captured by the filter. Because the filter is in contact with the inner peripheral surface of an external-tooth forming portion of the external gear, foreign matters can be assuredly prevented from intruding into a sliding friction portion between an outer-ring outer peripheral surface of the wave generator bearing and the inner peripheral surface of the external-tooth forming portion of the external gear.
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