公开(公告)号：US20190048925A1

公开(公告)日：2019-02-14

申请号：US15763775

申请日：2015-11-10

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Masaru KOBAYASHI

IPC: F16C17/10 ,  F16C33/26 ,  F16H49/00

Abstract: A sliding bearing has an outer ring, an inner ring, an annular-shaped raceway formed between the two rings, and a sliding body mounted on the raceway. The raceway has rectangular cross-section or a rhomboid cross-section formed from an outer-ring-side V groove and an inner-ring-side V groove. The sliding body is, for example, formed of an endless coil spring, and the outer peripheral surface of the circular contour thereof is in contact in a four-point contact state with four first through fourth raceway surfaces of the raceway. A sliding bearing having a compact configuration that can bear a moment load can be achieved.

公开(公告)号：US20190017585A1

公开(公告)日：2019-01-17

申请号：US16068413

申请日：2016-02-02

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Naoki KANAYAMA

IPC: F16H49/00

Abstract: A strain wave gearing has a wave generator for generating a wave motion that repeatedly flexes each part in the circumferential direction of an externally toothed gear in the radial direction. The wave generator is provided with a plurality of wave-generating members arranged at positions at a prescribed angular interval along the circumferential direction of the externally toothed gear. Each of the wave-generating members is provided with an outer circumferential cam surface, rotates centered on a rotation center line that is parallel to the device center axis line, and repeatedly flexes each part of the externally toothed gear in the radial direction with a prescribed amplitude. A strain wave gearing, which is suitable for forming a large device hollow part, can be obtained.

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.

公开(公告)号：US20180259054A1

公开(公告)日：2018-09-13

申请号：US15758377

申请日：2015-09-17

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Masaru KOBAYASHI

IPC: F16H49/00

CPC classification number: F16H49/001

Abstract: A wave generator for a strain wave gearing is provided with a rigid plug having an ellipsoidal plug-outer-circumferential surface, and a ring-shaped displacement body that is flexed to an ellipsoidal shape by the plug. The ring-shaped displacement body is provided with a plurality of radially arranged displacing sections. The plug-contacting surfaces of the displacing sections are in sliding contact with the plug-outer-circumferential surface and when the plug rotates, the displacing sections are repeatedly displaced in the radial direction. By the displacement of the displacing sections, wave motion is generated in an external gear. It is possible to achieve a wave generator capable of generating wave motion in the external gear with a small rotational torque.

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

IPC: F16H49/00 ,  F16H1/00

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.

公开(公告)号：US10060517B2

公开(公告)日：2018-08-28

申请号：US14758451

申请日：2013-11-19

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Satoshi Kiyono ,  Tatsuro Hoshina ,  Masakatsu Sasahara

IPC: F16H49/00

CPC classification number: F16H49/001 ,  F16H2049/003

Abstract: An externally toothed gear of a strain wave gearing is made to flex into a shape conforming to an ellipsoidal curve. The externally toothed gear meshes with an internally toothed gear at the major-diameter position of the ellipsoidal curve. These two meshing positions gradually change in the circumferential direction of the both gears along the tooth trace direction. The number of external teeth of the externally toothed gear participating in meshing with the internally toothed gear can be increased. A strain wave gearing which has a high rigidity and is capable of reducing vibrational noise, can be realized.

公开(公告)号：US20180163622A1

公开(公告)日：2018-06-14

申请号：US15578432

申请日：2016-04-22

Applicant: NISSAN MOTOR CO., LTD. ,  HARMONIC DRIVE SYSTEMS INC. ,  HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Ryosuke HIYOSHI ,  Yoshiaki TANAKA ,  Yoshihide KIYOSAWA ,  Jun HANDA ,  Kishiro NAGAI ,  Junichiro ONIGATA ,  Yoshihiko YAMADA

IPC: F02B75/04 ,  F02B75/32 ,  F02D15/02 ,  F16H1/28 ,  F16H1/32

CPC classification number: F02B75/045 ,  F02B75/04 ,  F02B75/32 ,  F02D15/02 ,  F16H1/28 ,  F16H1/32 ,  F16H2001/323

Abstract: Disclosed is a variable compression ration mechanism in which a control shaft is rotated and driven by an electric motor through a wave gear reducer. The wave gear reducer includes: a first internal gear member; an external gear member arranged concentrically inside the internal gear member; a wave generator having an oval outer shape and arranged inside the external gear member; and a second internal gear member, wherein a ratio of the number of teeth of a fixed gear portion of the first internal gear member to the number of teeth of a first gear portion of the external gear member is set greater than a ratio of the number of teeth of an output-side gear portion of the second internal gear member to the number of teeth of a second gear portion of the external gear member.

公开(公告)号：US20180112709A1

公开(公告)日：2018-04-26

申请号：US15565333

申请日：2015-04-17

Applicant: Harmonic Drive Systems Inc.

Inventor： Toshiki MARUYAMA ,  Kazumasa FURUTA

IPC: F16C32/06 ,  H01L21/02 ,  F16C33/72 ,  H01L21/67

CPC classification number: H02K5/15 ,  F16C19/54 ,  F16C35/042 ,  F16C41/007 ,  F16C2380/26 ,  H01L21/304 ,  H02K5/10 ,  H02K5/1732 ,  H02K5/22 ,  H02K11/215 ,  H02K2205/09

Abstract: A static pressure seal-equipped motor (1) in which front and rear gaps are sealed by first and second static pressure seal portions (30, 40) disposed at first and second axial end portions (12a, 12c) of a motor rotating shaft (12) protruding toward front and rear. Sealing gas supplied to sealing gaps (32, 42) of the first and second static pressure seal portions (30, 40) is caused to diverge and flow to chemical liquid atmospheres (5a, 5b) and a motor chamber (18) or an encoder chamber (21) into the chemical liquid atmospheres (5a, 5b), and also prevent entry of chemical liquid-containing gas from the chemical liquid atmospheres (5a, 5b) into the motor chamber (18) or encoder chamber (21).

公开(公告)号：US09874273B2

公开(公告)日：2018-01-23

申请号：US14611304

申请日：2015-02-02

Applicant: Harmonic Drive Systems Inc.

Inventor： Masaru Kobayashi ,  Daisuke Orii

IPC: C21D9/32 ,  C21D1/22 ,  F16H55/06 ,  F16H55/08 ,  C21D6/00 ,  C21D8/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  C21D7/06 ,  F16H49/00

CPC classification number: F16H55/0833 ,  C21D1/22 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D7/06 ,  C21D8/005 ,  C21D9/32 ,  C21D2211/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  F16H55/06 ,  F16H2049/003

Abstract: A method for manufacturing a flexible externally toothed gear includes: a first step (ST1) for producing a primary molded article by performing near-net-shape plastic working on a material comprising a nickel-free low-alloy steel having a silicon content of 1.45-1.5 wt %; a second step (ST2) for martempering the primary molded article; a third step (ST3) for producing a secondary molded article from the primary molded article; and a fourth step (ST4) for shot-peening the secondary molded article to change the surface portions of the tooth part and other parts to martensite. A flexible externally toothed gear can be obtained in which the surface hardness is kept within a prescribed range and the fatigue strength and abrasion resistance are high.

公开(公告)号：US09797497B2

公开(公告)日：2017-10-24

申请号：US14906861

申请日：2013-07-25

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Yoshitomo Mizoguchi ,  Yoshihide Kiyosawa

IPC: F16H49/00

CPC classification number: F16H49/001

Abstract: A flat strain wave gearing device equipped with: a first internal gear and a second internal gear; a flexible tubular external gear; and an elliptically shaped wave generator. In the direction of a central axis, the center of support of the external teeth by the wave generator is offset, by an offset amount of Δ along the direction of the central axis, with respect to the tooth-width center of the external teeth of the external gear. By setting the offset direction and the offset amount appropriately it is possible to achieve a strain wave gearing device which is suitable in terms of the operating conditions and the mechanical characteristics of the first and second internal gears.