Abstract:
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.
Abstract:
A three-dimensionally shaped object and an apparatus and a method for manufacturing the three-dimensionally shaped object are provided. The apparatus for manufacturing the three-dimensionally shaped object includes a support module, a material supply module, and an energy source module. The support module is suitable for holding a semi-finished object. The material supply module supplies a powder material and attaches the powder material to a surface of the semi-finished object. The energy source module supplies a radiation source that irradiates the semi-finished object. The support module is adapted to rotate the semi-finished object, so that the powder material attached to the semi-finished object turns to face the energy source module and is irradiated by the radiation source to form a sintered layer. The powder material remains on the semi-finished object while the semi-finished object is rotated.