公开(公告)号：US10989292B2

公开(公告)日：2021-04-27

申请号：US16603405

申请日：2017-04-28

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Naoki Kanayama

IPC: F16H49/00

Abstract: A wave generator of a wave gear device flexes an externally toothed gear into a shape along an elliptical closed curve to form engaging portions of the externally toothed gear with an internally toothed gear at two places, namely at both ends of the major axis, and to move the engaging portions in the circumferential direction. The elliptical closed curve has a non-point symmetric shape. For example, the elliptical closed curve is a line symmetric closed curve that is not symmetric about the minor axis, and is symmetric about only the major axis. In the non-point symmetric state, the engaging portions are formed at both ends in the major axis direction. By selecting different shapes for the engaging portions at the two locations of the major axis, vibration attributed to a secondary angular transmission error component generated along with the rotation of the wave generator can be reduced.

公开(公告)号：US10309453B2

公开(公告)日：2019-06-04

申请号：US16064261

申请日：2015-12-21

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Yuya Murayama ,  Naoki Kanayama

IPC: F16C19/36 ,  F16C33/58 ,  F16C19/38 ,  F16C33/80

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.

公开(公告)号：US10753450B2

公开(公告)日：2020-08-25

申请号：US16320520

申请日：2016-09-30

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Naoki Kanayama ,  Toru Takeda

IPC: H02K49/10 ,  F16H49/00 ,  H02K49/00

Abstract: A magnetic type rotation transmitting mechanism has a rotating plate made of a magnetic material, and a magnet to which the rotational movement of the rotating plate is transmitted through a magnetic coupling between the magnet and the rotating plate. When the rotating plate is rotated, a plurality of oblique edge portions formed on the outer peripheral edge of the rotating plate rotate while sequentially passing through a magnet-facing area. The oblique edge portions move in the direction of the rotation centerline of the rotating plate, the rotation centerline being perpendicular to the center axis line of the magnet. The magnet is rotated about the center axis line by a magnetic force occurring between the magnet and the oblique edge portions passing through the magnet-facing area. It is possible to realize a small and compact mechanism for extracting rotation.

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.

公开(公告)号：US11566695B2

公开(公告)日：2023-01-31

申请号：US17281736

申请日：2018-11-16

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Naoki Kanayama

IPC: F16H49/00 ,  F16H57/04

Abstract: A unit-type strain wave gearing device provided with a cross roller bearing that supports an internally toothed gear and an externally toothed gear in a state in which both gears can rotate relative to each other, and a meshing section of both gears is lubricated with grease. A gap by which the meshing section and the cross roller bearing raceway groove communicate is formed between the inner ring of the cross roller bearing and the external gear. Due to the pump effect caused by deflection of the external gear, grease is pushed from the meshing section to the gap. Some grease is returned to the inner space of the externally toothed gear via a grease-flowing hole that penetrates the diaphragm of the external gear. Thus, leakage of grease from an oil seal of the cross roller bearing to the unit side can be controlled.