US 2017/0254403 A1 · WAVE GENERATOR AND STRAIN WAVE GEARING

Abstract

A wave generator of a strain wave gearing has a rigid plug provided with an elliptical outer peripheral surface, and a roller bearing. The outer peripheral surface of the plug is provided with a major-axis-side outer-peripheral surface portion formed at a major axis position L1, and a minor-axis-side outer-peripheral surface portion formed at a minor axis position L2. The major-axis-side outer-peripheral surface portion is a tapered surface that is tapered along a center axis line, and the minor-axis-side outer-peripheral surface portion is an inverted tapered surface that is tapered in the opposite direction. An externally toothed gear can be supported and flexed into an elliptical shape without partial contact by using the wave generator in which the roller bearing is used.

Claims6

Dependent claims

A wave generator of a strain wave gearing, which makes a cup-shaped or silk-hat-shaped externally toothed gear to flex into an elliptical shape and partially mesh with a rigid internally toothed gear, the wave generator comprising:

a rigid plug having an elliptical outer peripheral surface;
and
a roller bearing mounted on the outer peripheral surface of the plug,
wherein the outer peripheral surface of the plug has:
a tapered surface that is tapered toward a first direction along a center axis line of the plug on a major axis position of the outer peripheral surface;
and
an inverted tapered surface that is tapered toward a second direction opposite to the first direction along the center axis line on a minor axis position of the outer peripheral surface.

4 more elements

Dependencies are inferred from the claim text.

Wave generator and strain wave gearing

Life of this patent

Wave generator and strain wave gearing

Life of this patent

Abstract

Claims6