Reduction gearing with a high reduction ratio

摘要

The present invention relates to a reduction gearing with a ring gear, at least one planet gear rolling around in the ring gear and having a planet gear axis, and an output being rotatably mounted coaxially to the ring gear. According to the invention, it is provided that the planet gear comprises a guide member that is spaced apart from the planet gear axis and describes a hypocycloid relative to the ring gear when the planet gear rolls around, wherein guidance is provided between the guide member and a cam disk of the output, such that the output experiences a drive motion by the planet gear rolling around.

主权项

1. Reduction gearing with:
a ring gear, at least one planet gear rolling around in said ring gear with a planet gear axis, and an output rotatably mounted coaxially to said ring gear, wherein said planet gear comprises a guide member that is spaced apart from said planet gear axis and moves along a first hypocycloid relative to said ring gear when said planet gear rolls around in said ring gear, wherein said guide member is guided by a cam disk of said output such that said output experiences a rotary drive motion imparted by said cam disk guiding said guide member when said planet gear rolls around in said ring gear, wherein said cam disk comprises a cam contour for guiding said guide member, wherein said cam contour is either a closed second hypocycloid obtained by the motion of said guide member at a ratio other than an actual ratio of an effective radius R of said ring gear to an effective radius r of said planet gear, or an envelope of said closed second hypocycloid.