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公开(公告)号：US20190003525A1
公开(公告)日：2019-01-03
申请号：US16064261
申请日：2015-12-21
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Yuya MURAYAMA , Naoki KANAYAMA
Abstract: The roller insertion groove of the inner ring of a crossed roller bearing is provided with an outer circumferential surface-side groove opening that is exposed to an inner rings-side V-groove. The groove opening is defined by circumferential direction opening edge that extends in the circumferential direction along the inner ring-side V-groove and side opening edges that extend from both ends of the circumferential direction opening to the ring-shaped end face of the inner ring. Concentration of stress occurs in the corners between the circumferential direction opening edges and the side opening edges. The circumferential direction opening edge is formed so as not to coincide with the minimum outer diameter section of the inner ring-side V-groove.
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公开(公告)号：US10122239B2
公开(公告)日：2018-11-06
申请号：US15326049
申请日：2014-08-12
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Syuhei Kobayashi
Abstract: The rotary actuator has an outer rotor type motor assembled coaxially in a device hollow part of a strain wave gearing. One end of the device hollow part is closed by an end cover fixed to an output shaft of the strain wave gearing. A detection part is arranged between the motor and the end cover inside the device hollow part. A rotational position of a rotation detection plate mounted on an inside end surface of the end cover is detected by the detection part, to detect the rotational position of the output shaft. A rotary actuator that is small and compact can be realized.
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公开(公告)号：US09989141B2
公开(公告)日：2018-06-05
申请号：US14901237
申请日：2013-07-04
Applicant: Harmonic Drive Systems Inc.
Inventor： Sotaro Miyake , Yoshihide Kiyosawa
CPC classification number: F16H49/001 , F16H2049/003
Abstract: A press plate is tacked to a boss of a cup-shaped flexible externally toothed gear of a wave gear device unit. A second arm as a driven member is attached by a fastening bolt to an end surface on an outer side of an output flange of the wave gear device unit. The fastening bolt is screwed into and secured in a tap hole of the press plate from each bolt insertion hole of the second arm, via a flange-side bolt insertion hole and a boss-side bolt insertion hole. A fastening structure can be achieved in which a driven member is fastened to a wave gear device unit in which holes are easily machined into the output flange, and only a few fastening bolts are needed to fasten the boss, the output flange, and the driven member.
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公开(公告)号：US09897195B2
公开(公告)日：2018-02-20
申请号：US15166540
申请日：2016-05-27
Applicant: Harmonic Drive Systems Inc.
Inventor： Norio Shirokoshi
CPC classification number: F16H57/0464 , F16H57/04 , F16H57/0479 , F16H57/0486 , F16H57/08 , F16H2057/085
Abstract: A planetary gear drive has needle roller bearings of full roller type as planetary gear bearings for planetary gears. The needle roller bearings have lubrication mechanisms, respectively. Each lubrication mechanism has an annular grease retaining groove. The grease retaining groove is formed on an inner peripheral surface (an outer-race-side raceway surface) of the shaft hole of each planetary gear. Poor lubrication can be prevented from occurring when needle roller bearings of full roller type are employed as the planetary gear bearings.
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公开(公告)号：US20180023678A1
公开(公告)日：2018-01-25
申请号：US15541390
申请日：2015-01-08
Applicant: Harmonic Drive Systems Inc.
Inventor： Masaru KOBAYASHI , Tatsuro HOSHINA
CPC classification number: F16H49/001 , F16C19/225 , F16C19/26 , F16C19/305 , F16C33/4605 , F16C33/467
Abstract: A strain wave gearing has a wave generator provided with a plug and a roller bearing. The roller bearing is provided with flange plates fixed to both sides of the plug, and outer circumferential edge portions of the flange plates protrude outwardly from a plug outer circumferential surface so as to locate on both sides, in an axial line direction, of the raceway of rollers. The movements of the rollers in the axial line direction are constrained by the outer circumferential edge portions. The movement of retainer in the axial line direction is constrained by engaging with the rollers. The movement of each component part of the roller bearing in the axial line direction can be constrained without using additional components.
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Patent Agency Ranking
公开(公告)号：US09800128B2
公开(公告)日：2017-10-24
申请号：US14423228
申请日：2013-01-18
Applicant: Harmonic Drive Systems Inc.
Inventor： Toshiki Maruyama , Tomoki Terashima
IPC: H02K41/03 , H02K41/035 , G02B7/02 , H02K11/21
CPC classification number: H02K41/0356 , G02B7/023 , H02K11/21
Abstract: A linear DC motor having first and second drive coils and first and second drive magnets arranged in a symmetrical state in relation to a motor central axis that passes through a sliding member in which a lens is mounted. The first and second coils on a moveable side are positioned to both the left and right sides of the sliding member. The first and second drive coils are designed to be independent without being affected by the shape, size, arrangement position, and the like of the sliding member, a linear guide, and a detection part. The first and second drive coils have high rigidity and do not deform when the sliding member slides. Accordingly, it is possible to obtain a linear DC motor that has a highly rigid moveable part and performs positioning action with high responsiveness and high precision.
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公开(公告)号：US20170227106A1
公开(公告)日：2017-08-10
申请号：US15408889
申请日：2017-01-18
Applicant: Harmonic Drive Systems Inc.
Inventor： Noboru TAKIZAWA , Go KUROIWA
IPC: F16H49/00
CPC classification number: F16H49/001 , F16H2049/003
Abstract: In the cup-shaped externally toothed gear, the outside end face profile of the diaphragm is defined by a first concave circular arc having a first radius, a second concave circular arc that has a second radius and is smoothly connected to the first concave circular arc, an inclined straight line that is smoothly connected to the second concave circular arc and is inclined toward an inside straight line with respect to the center axis line, the inside straight line defining the outside profile of the diaphragm. The second radius is larger than the first radius, and the thickness of the diaphragm is gradually decreased from the side of the boss to the side of the cylindrical body. The stress concentration in the boss-side joint portion of the diaphragm can be relieved, whereby enhancing fatigue strength of the flexible externally toothed gear.
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公开(公告)号：US20170222517A1
公开(公告)日：2017-08-03
申请号：US15326049
申请日：2014-08-12
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Syuhei KOBAYASHI
CPC classification number: H02K7/116 , F16H49/001 , H02K1/2786 , H02K7/102 , H02K11/21
Abstract: The rotary actuator has an outer rotor type motor assembled coaxially in a device hollow part of a strain wave gearing. One end of the device hollow part is closed by an end cover fixed to an output shaft of the strain wave gearing. A detection part is arranged between the motor and the end cover inside the device hollow part. A rotational position of a rotation detection plate mounted on an inside end surface of the end cover is detected by the detection part, to detect the rotational position of the output shaft. A rotary actuator that is small and compact can be realized.
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公开(公告)号：US20170219050A1
公开(公告)日：2017-08-03
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
CPC classification number: F16H1/32 , F16H3/70 , F16H49/001 , F16H55/0833 , F16H57/02 , F16H2049/003
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：US20170194832A1
公开(公告)日：2017-07-06
申请号：US15315629
申请日：2014-06-02
Applicant: Harmonic Drive Systems Inc.
Inventor： Daisuke YAGUCHI , Kiyoto KOBAYASHI
Abstract: A rotation actuator is equipped with a motor and a reduction gear disposed adjacent to each other. Both shaft end portions of a rotating shaft, which passes through the center of the motor and reducer, are rotatably supported through first and second rolling bearings by first and second fixed discs that are mutually fastened and fixed. A rotation output plate is supported through a third rolling bearing in the outer peripheral surface of the second fixed disc. A sliding ring is mounted between the rotation output plate and the first fixed disc. The sliding ring functions as a thrust bearing for the rotation output plate and also functions as a sealing mechanism for preventing grease from flowing from the reducer gear to the outside. A flat rotation actuator can be achieved.
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