Hollow strain wave gearing

摘要

A first shaft end of a hollow shaft of a hollow strain wave gearing is supported by a first support bearing with a collar interposed therebetween which is mounted to the outer-circumferential surface of the first shaft end. A second shaft end on the other end of the hollow shaft is supported by a second support bearing. A wave plug of a wave generator is integrally formed with the hollow shaft, and a wave bearing is mounted on the elliptical outer-circumferential surface thereof from the first-shaft-end side. It is possible to use a first support bearing having an inner diameter larger than the outer diameter of the first shaft end as the first support bearing for supporting the first shaft end.

主权项

1. A hollow strain wave gearing comprising:
a hollow shaft; a wave generator having an ellipsoidally contoured wave plug formed on an outer peripheral surface of the hollow shaft, and a wave bearing fitted on an ellipsoidal outer peripheral surface of the wave plug from a first shaft end part of the hollow shaft; a cylindrical collar mounted on an outer peripheral surface of the first shaft end part; a first support bearing for supporting the first shaft end part of the hollow shaft with the collar interposed therebetween; and a second support bearing for supporting a second shaft end part of the hollow shaft; wherein an inside diameter of a circular inner peripheral surface of the first support bearing is larger than a minor axis of the ellipsoidal outer peripheral surface of the wave plug.