This invention provides a two-stage
reducer based on cycloidal and epicycloidal transmissions, belonging to the field of
reducer technology. The two-stage
reducer includes a housing, a primary input mechanism, a primary reduction mechanism, a primary output / secondary input mechanism, a secondary reduction mechanism, and a secondary output mechanism. The primary and secondary reduction mechanisms employ either epicycloidal pinwheel transmission or cycloidal pinwheel transmission, and the transmission types are different. Both the primary and secondary reduction mechanisms include at least one cycloidal wheel, at least three eccentric crankshafts with pins evenly distributed along the circumference, and an intermediate fixing plate for fixing the eccentric crankshafts. Both the primary output / secondary input mechanism and the secondary output mechanism include pinwheels. Under the same
reduction ratio, this invention exhibits good dynamic characteristics, a compact and simple structure, and the pinwheels can be designed with a sufficiently large
diameter, thus improving load-
bearing capacity. Furthermore, the pinwheels are fixed at both ends by bearings and can roll, reducing wear between components.