Abstract: A roller reducer comprises: an input member, a support member, an output member, and rollers, wherein the output member comprises output member nuts having a number of thread starts different from the number of thread starts on the support member nuts, wherein the rollers are arranged around the at least two support member nuts and the at least two output member nuts in such manner that each roller portion out of at least one pair of roller portions engages at least one of at least one of the support member nuts and at least one of the output member nuts.

Abstract: The invention relates to planetary mechanisms for transmitting rotational movement. Particularly, the invention relates to planetary reducers having stepped threaded rollers. More particularly, the invention relates to roller reducers.

Abstract: The present invention relates to a roller reducer comprising a transmission gear having an externally threaded shaft having at least one left-handed thread portion, at least one right-handed thread portion, and at least one shaft flange ring, and a plurality of rollers, each roller having a plurality of thread portions, comprising at least one left-handed thread portion and at least one right-handed thread portion, each thread portion arranged to engage with the respective thread portions of the shaft, and at least one roller flange ring arranged adjacent to the roller thread portions to rotationally slide against the corresponding at least one flange ring of the shaft. Diameters of the flange rings of the rollers and the flange rings of the shaft are each equal to the respective effective thread diameters of the engaged thread portions of the rollers and the shaft, respectively.

Abstract: The present invention relates to a roller reducer comprising a transmission gear having an externally threaded shaft having at least one left-handed thread portion, at least one right-handed thread portion, and at least one shaft flange ring, and a plurality of rollers, each roller having a plurality of thread portions, comprising at least one left-handed thread portion and at least one right-handed thread portion, each thread portion arranged to engage with the respective thread portions of the shaft, and at least one roller flange ring arranged adjacent to the roller thread portions to rotationally slide against the corresponding at least one flange ring of the shaft. Diameters of the flange rings of the rollers and the flange rings of the shaft are each equal to the respective effective thread diameters of the engaged thread portions of the rollers and the shaft, respectively.