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公开(公告)号：US12095341B2
公开(公告)日：2024-09-17
申请号：US17629077
申请日：2020-07-27
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Toru Takeda
CPC classification number: H02K7/116 , F16H49/001 , H02K3/26 , H02K7/083 , H02K21/24 , H02K2203/03
Abstract: A rotary actuator includes a PWB motor and a wave gear drive. The PWB motor is an axial gap motor. A motor rotor in the PWB motor includes a rotor disk coaxially affixed to a hollow motor shaft and a rotor magnet affixed to the rotor disk. A motor stator is composed of a printed wiring board, and includes an insulating substrate and a motor coil defined by printed wiring formed on the insulating substrate. Compared with a conventional rotary actuator using an SPM motor or the like, the shaft length can be shortened and the hollow diameter thereof can be increased.
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公开(公告)号：US12092199B2
公开(公告)日：2024-09-17
申请号：US17998573
申请日：2021-08-24
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Masaru Kobayashi
CPC classification number: F16H57/041 , F16H49/001 , F16H57/048
Abstract: A powder supply mechanism, which is provided with a press-molded article obtained by consolidating a solid lubricant powder in advance, is incorporated into an inner-side space of an externally toothed gear of a strain wave gearing. While the strain wave gearing is operating, the press-molded article is worn down by the friction plate, whereby the powder supply mechanism can incrementally supply very small amounts of a solid lubricant abrasion powder from the press-molded article over an extended period. It is possible to suppress any reduction in efficiency caused by loss torque produced due to a large amount of the solid lubricant powder infiltrating gaps in, inter alia, a contact section of a wave generator rotating at high speed. Thus, it is possible to extend the service life of the powder-lubricated strain wave gearing while keeping the efficiency consistently high.
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公开(公告)号：US20240269770A1
公开(公告)日：2024-08-15
申请号：US18007496
申请日：2021-10-28
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Morihiko YAMAGUCHI
IPC: B23K26/082 , B23K26/26 , B23K103/04
CPC classification number: B23K26/082 , B23K26/26 , B23K2103/04
Abstract: In a laser welding method for welding a first metal member and a second metal member, a first wobbling process is carried out in which a first laser beam is directed in a first scanning pattern along a butt-joining line and a first welded part is formed. A second wobbling process is subsequently performed in which a second laser beam is directed in a second scanning pattern along the surface of the first welded part formed through the first wobbling process and a second welded part that is wider and shallower than the first welded part is formed overlapping the first welded part. A welded part in which delayed cracking can be prevented or suppressed is thus formed.
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公开(公告)号：US20240229918A1
公开(公告)日：2024-07-11
申请号：US17998573
申请日：2021-08-24
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Masaru KOBAYASHI
CPC classification number: F16H57/041 , F16H49/001 , F16H57/048
Abstract: A powder supply mechanism, which is provided with a press-molded article obtained by consolidating a solid lubricant powder in advance, is incorporated into an inner-side space of an externally toothed gear of a strain wave gearing. While the strain wave gearing is operating, the press-molded article is worn down by the friction plate, whereby the powder supply mechanism can incrementally supply very small amounts of a solid lubricant abrasion powder from the press-molded article over an extended period. It is possible to suppress any reduction in efficiency caused by loss torque produced due to a large amount of the solid lubricant powder infiltrating gaps in, inter alia, a contact section of a wave generator rotating at high speed. Thus, it is possible to extend the service life of the powder-lubricated strain wave gearing while keeping the efficiency consistently high.
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公开(公告)号：US11885403B2
公开(公告)日：2024-01-30
申请号：US17759290
申请日：2020-04-10
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Daisuke Orii , Syuhei Kobayashi
IPC: F16H57/029 , F16H49/00 , F16H57/04
CPC classification number: F16H57/029 , F16H49/001 , F16H57/048 , F16H57/0427
Abstract: A strain wave gearing has a lubricant sealing structure that prevents a lubricant from leaking to the outside through a gap portion between a hollow input shaft and an end plate. The lubricant sealing structure includes an oil-repellent surface formed on the surface portion facing the gap portion, an oil seal that seals the gap portion, and an oil film forming surface formed at a lip tip surface of the oil seal. The oil-repellent surface has a surface texture in which first fine grooves are formed in a predetermined pattern so that an oil-repellent effect can be obtained with respect to the lubricant. The oil film forming surface has a surface texture in which second fine grooves are formed in a predetermined pattern so that an oil film forming effect of a seal lip grease can be obtained.
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Patent Agency Ranking
公开(公告)号：US11828356B2
公开(公告)日：2023-11-28
申请号：US17639603
申请日：2020-10-30
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Norio Shirokoshi
CPC classification number: F16H49/001 , F16H55/0833 , 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. The tooth tip circle of an internal-teeth inner-end-side portion of the internal teeth is larger than that of other portions and does not interfere with the external teeth. The external teeth and the internal teeth mesh three-dimensionally, the teeth do not interfere at the internal-teeth inner-end side.
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公开(公告)号：US20230358304A1
公开(公告)日：2023-11-09
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：US11808612B2
公开(公告)日：2023-11-07
申请号：US17298974
申请日：2019-03-15
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Shintaro Ueno , Yoshinori Shibahara , Sadaharu Kanamori
CPC classification number: G01D5/3473 , H02K1/22
Abstract: In this optical rotary encoder, detection tracks of a rotating disc are irradiated with detection light emitted from a light-emitting element. An optical signal obtained via slits in the detection tracks passes through a slit pattern in a fixed slit plate and is received by light-receiving surfaces of a light-receiving element. The slit pattern in the fixed slit plate is formed so as to fit into a range of an effective spot of the detection light. An LED or other light-emitting element that has a small effective spot diameter can be used, which is advantageous in terms of reducing costs and making the device more compact.
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公开(公告)号：US20230093559A1
公开(公告)日：2023-03-23
申请号：US17759290
申请日：2020-04-10
Applicant: HARMONIC DRIVE SYSTEMS INC.
Inventor： Daisuke ORII , Syuhei KOBAYASHI
IPC: F16H57/029 , F16H49/00 , F16H57/04
Abstract: A strain wave gearing has a lubricant sealing structure that prevents a lubricant from leaking to the outside through a gap portion between a hollow input shaft and an end plate. The lubricant sealing structure includes an oil-repellent surface formed on the surface portion facing the gap portion, an oil seal that seals the gap portion, and an oil film forming surface formed at a lip tip surface of the oil seal. The oil-repellent surface has a surface texture in which first fine grooves are formed in a predetermined pattern so that an oil-repellent effect can be obtained with respect to the lubricant. The oil film forming surface has a surface texture in which second fine grooves are formed in a predetermined pattern so that an oil film forming effect of a seal lip grease can be obtained.
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公开(公告)号：USD971978S1
公开(公告)日：2022-12-06
申请号：US35511524
申请日：2020-09-09
Applicant: HARMONIC DRIVE SYSTEMS INC.
Designer： Hiroaki Kimura , Yoshihide Kiyosawa , Jun Handa
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