Title:
WAVE GEAR DEVICE AND WAVE GENERATOR
Document Type and Number:
WIPO Patent Application WO/2018/198348
Kind Code:
A1
Abstract:
A wave generator (4) of a wave gear device (1) bends an externally toothed gear (3) into a shape along an elliptical closed curve (C0), and engaging portions (5a, 5b) of the externally toothed gear (3) with an internally toothed gear (2) are formed at two places, namely at both ends of the major axis (Lmax), and the engaging portions (5a, 5b) are moved in the circumferential direction. The elliptical closed curve (C0) has a non-point symmetric shape. For example, the elliptical closed curve (C0) is a line symmetric closed curve that is not symmetric about the minor axis (Lmin), and is symmetric about only the major axis (Lmax). In the non-point symmetric state, the engaging portions (5a, 5b) 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 (4) can be reduced.
Inventors:
KANAYAMA NAOKI (JP)
Application Number:
PCT/JP2017/017030
Publication Date:
November 01, 2018
Filing Date:
April 28, 2017
Export Citation:
Assignee:
HARMONIC DRIVE SYSTEMS (JP)
International Classes:
F16H1/32
Foreign References:
| JPS62209247A | 1987-09-14 | |||
| JP2014190396A | 2014-10-06 | |||
| JP4067037B2 | 2008-03-26 | |||
| JP2916012B2 | 1999-07-05 |
Other References:
See also references of EP 3617549A4
Attorney, Agent or Firm:
YOKOZAWA Shiro (JP)
Download PDF: