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AssigneeHarmonic Drive Systems Inc.
InventorsYoshihide Kiyosawa, Noboru Takizawa, Takahiro Oukura, Yoshito Yamamoto
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A cup-type harmonic gear drive comprises a rigid circular spline, a cup-shaped flexspline disposed inside the circular spline and a wave generator means fitted inside the flexspline for flexing the flexspline into elliptic to engage it with the circular spline and for rotating the engagement portions to thereby produce relative rotation between the splines. The flexspline has a tube, a disc-shaped diaphragm connected integrally to the end of said tube to define the cup bottom, and a thick boss formed on the center of the diaphragm. The diaphragm has a root portion from the boss, a thickness of which is set at least about three times the minimum thickness of the diaphragm. The outer profile of the diaphragm is defined, when viewed along a plane including the axis of the flexspline, by a plurality of curves having a different curvature. These curves are arranged from one having a larger curvature from the root protion to the tube portion of the diaphragm. Thus, the stress distribution of the flexspline can be made smooth to the extent for practical use even where a shorter flexspline is adopted.
A cup-type harmonic drive comprising a circular rigid member, a cup-shaped flexible member disposed inside the circular rigid member and a wave generator means fitted inside the flexible member for flexing the flexible member radially to engage or contact it with portions of the circular rigid member and for rotating engagement or contact portions to produce relative rotation between the circular rigid member and the flexible member, wherein
A cup-type harmonic gear drive comprising a circular spline, a cup-shaped flexspline disposed inside said circular spline and a wave generator means fitted inside said flexspline for flexing the flexspline radially to engage it with the circular spline partially and for rotating engagement portions to produce relative rotation between said circular spline and said flexspline, wherein
A cup-type harmonic gear drive comprising a circular spline, a cup-shaped flexspline disposed inside said circular spline and a wave generator means fitted inside said flexspline for flexing the flexspline radially to engage it with portions of the circular spline and for rotating engagement portions to produce relative rotation between said circular spline and said flexspline, wherein
A cup-type harmonic gear drive comprising a circular spline, a cup-shaped flexspline disposed inside said circular spline and a wave generator means fitted inside said flexspline for flexing the flexspline radially to engage it with the circular spline partially and for rotating the engagement portions to thereby produce relative rotation between said circular spline and said flexspline, wherein
Dependencies are inferred from the claim text.