Title:
WAVE GEAR DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/030843
Kind Code:
A1
Abstract:
A wave gear device (1) wherein the outer circumferential surface (27) of an outer ring of a wave generator (4) is in contact with an inner-circumferential-surface portion (16) of a flexible externally toothed gear (3), and a release groove (30), which is not in contact with the outer circumferential surface (27), is formed in the inner-circumferential-surface portion (16). The release groove (30) is formed in a region containing a ball raceway groove (28). The groove depth of the release groove (30) gradually increases from both sides of the groove in the groove width direction toward a deepest portion (34) of the groove provided at an intermediate portion in the groove width direction. By providing the release groove (30), it is possible to smooth the distribution of pressing force of the wave generator (4) acting on the externally toothed gear (3) in the tooth-trace direction. In addition, the tooth root fatigue strength and the transmission torque capacity of the externally toothed gear (3) can be improved.
Inventors:
SHIROKOSHI NORIO (JP)
Application Number:
PCT/JP2017/028893
Publication Date:
February 14, 2019
Filing Date:
August 09, 2017
Export Citation:
Assignee:
HARMONIC DRIVE SYSTEMS (JP)
International Classes:
F16H1/32
Domestic Patent References:
| WO2013175531A1 | 2013-11-28 | |||
| WO2016092636A1 | 2016-06-16 |
Foreign References:
| DE102015223419A1 | 2016-11-10 | |||
| JP2009133414A | 2009-06-18 | |||
| JP2017110705A | 2017-06-22 | |||
| JPH10159917A | 1998-06-16 | |||
| JPS61206154U | 1986-12-26 | |||
| JPS60129546U | 1985-08-30 | |||
| JP2009156462A | 2009-07-16 |
Other References:
See also references of EP 3667120A4
Attorney, Agent or Firm:
YOKOZAWA Shiro (JP)
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