Cutting part of coal mining machine

The utility model discloses a cutting part of a coal mining machine, and relates to a power output structure of the coal mining machine, and the cutting part of the coal mining machine is characterized by comprising a shell which is arranged in a rocker arm shape; a sun gear of the planetary mechanism serves as an input end, a planet carrier serves as an output end, and the cutting motor is in transmission connection with the sun gear; the cutting motor is in transmission connection with a sun gear of the planetary mechanism; the transmission reduction gear is in transmission connection with the planet carrier; the transmission gear is meshed with the transmission reduction gear, and the number of teeth of the transmission gear is equal to that of teeth of the transmission reduction gear; the sun gear is fitted with the transmission gear, and the tooth number of the sun gear is larger than that of the transmission gear; the output shaft is in transmission connection with the central gear; an output shaft is c