Power conversion device

The utility model relates to a power conversion device, consisting of a crankcase, a ratchet, a crankshaft, a three-sided tooth power lever, a positioning shaft, a positioning wheel, a reposition shaft and a reposition wheel, wherein the crankshaft is radially arranged at one side of the crankcase by a bearing and provided with the ratchet; the reposition wheel is axially arranged at the middle position of the crankcase; and the positioning wheel is arranged in two corners of one side on the positioning shaft, opposite to the crankcase, so as to lead the included angle of two angle edges of the reposition shaft and the crankcase to be 45 degrees. The crankcase, the reposition wheel and the positioning wheel form a space. One end of the three-sided tooth power lever is connected with a piston, and the other end thereof is meshed with the ratchet, the positioning wheel and the reposition wheel. The power conversion device has simple structure, low cost and convenient operation, further improves power conversion