Triple-speed chain conveyor

The invention discloses a triple-speed chain conveyor. The conveyor comprises a frame, wherein the inner front wall and the inner rear wall of the frame are fixedly connected to rotating shafts through bearings, the number of the rotating shafts is two, each of the surfaces of the two rotating shafts is fixedly connected to two sprockets, the four sprockets are symmetrically arranged at the frontand rear ends of the surfaces of the two rotating shafts in a rectangular array manner, two transverse sprockets are connected in a transmission mode through a chain, chain links of the chain are rotatably connected to process plates through connecting rods, a groove is formed in the upper surface of the frame, and the inner wall of the groove is rotatably connected to a rotating wheel through a rotating shaft. According to the triple-speed chain conveyor, the sprockets, the chain, a first belt pulley, a second belt pulley and a speed reducer are arranged, so that rotation of the speed reducercan conveniently drives t