Machine element or mechanism – Gearing
Patent
1996-09-27
1998-07-07
Wright, Dirk
Machine element or mechanism
Gearing
F16H 100
Patent
active
057751781
ABSTRACT:
A wave gear device has a circular spline, a flexspline arranged within the circular spline, and a wave generator disposed within the flexspline for deflecting the flexspline in radial direction for partially engaging external tooth formed on the flexspline with internal gear teeth formed on the circular spline and shifting an engaging position in circumferential direction to cause relative rotation depending upon difference in number of teeth of the internal gear teeth and the external gear teeth between the circular spline and the flexspline. The circular spline has an annular rigid teeth portion formed with the internal gear teeth along the inner periphery thereof, a fastening portion to be rigidly secured on one of a device housing and a supporting member rotatably supported in the device housing, and a connecting portion connecting the rigid teeth portion and the fastening portion. The connecting portion has a low rigidity at least in one of a direction of an axis of the device and a direction perpendicular to the axis, in comparison with that of the rigid teeth portion.
REFERENCES:
patent: 4770059 (1988-09-01), Beyer
patent: 4909098 (1990-03-01), Kiryu
patent: 5388483 (1995-02-01), Ishida et al.
Asawa Hideo
Shirasawa Naomi
Harmonic Drive Systems Inc.
Wright Dirk
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