RV reducer for robot

The invention discloses an RV reducer for a robot and relates to the field of industrial robot reducers. The reducer comprises a pin gear housing, roller pins, cycloidal gears, a crankshaft, planet carriers and rolling bearings. The RV reducer only adopts one crankshaft, and the crankshaft is hollow; no planet gears are adopted, and single reduction is realized; reinforcing shafts for connecting the cycloidal gears and the planet carriers have the small diameter, and a lot of the reinforcing shafts are adopted; and the two cycloidal gears with the phase difference being 180 degrees and the roller pins are meshed for reduction. The reducer has the beneficial effects as follows: the crankshaft is hollow, so that cross-wiring is facilitated; the RV reducer adopts one crankshaft and no planet gears and is simple in structure; the accuracy requirement for the planet carriers is reduced, and thus the planet carriers are convenient to machine; and the whole RV reducer is simple in structure, low in process difficulty, short in production cycle, low in machining cost and convenient to use.