Two-stage differential cycloidal speed reducer with a high reduction ratio

摘要

A two-stage differential cycloidal speed reducer with a high reduction ratio is provided, including: a plurality of supporting crank shafts; an input shaft including a first crank shaft portion and a second crank shaft portion; a first cycloidal gear provided on the first crank shaft portion; a second cycloidal gear provided on the second crank shaft portion and connected with the first cycloidal gear through the supporting crank shafts; a plurality of first ring pins provided around the outer circumference of the first cycloidal gear and in sliding contact with a plurality of teeth on the periphery of the first cycloidal gear; a first annular gear with the plurality of first ring pins; a plurality of second ring pins provided around the outer circumference of the second cycloidal gear and being in sliding contact with a plurality of teeth on the periphery of the second cycloidal gear; and a second annular gear with the plurality of second ring pins.

主权项

1. A two-stage differential cycloidal speed reducer with a high reduction ratio, comprising:
an input shaft including a first crank shaft portion and a second crank shaft portion, the first crank shaft portion and the second crank shaft portion bending in opposite directions, with an axis of the input shaft as a center; a first cycloidal gear provided on the first crank shaft portion of the input shaft and having a plurality of teeth on the periphery thereof; a first annular gear provided on one end of the input shaft adjacent the first cycloidal gear and having a plurality of first ring pins provided around an outer circumference of the first cycloidal gear and being in sliding contact with the plurality of teeth of the first cycloidal gear; a plurality of supporting crank shafts; a second cycloidal gear provided on the second crank shaft portion of the input shaft and connected with the first cycloidal gear through the plurality of supporting crank shafts, and having a plurality of teeth on a periphery thereof; and a second annular gear provided on one end of the input shaft adjacent the second cycloidal gear and having a plurality of second ring pins provided around an outer circumference of the second cycloidal gear and in sliding contact with the plurality of teeth of the second cycloidal gear, wherein the first cycloidal gear drives the second cycloidal gear through the plurality of supporting crank shafts, and the first cycloidal gear has a teeth number greater than a teeth number of the second cycloidal gear, and wherein an outer diameter of the first annular gear is larger than an outer diameter of the second annular gear, and the outer diameter of the second annular gear is larger than a diameter of a circle that surrounds the first ring pins.