Low noise twig grinder

The invention relates to a low noise twig grinder, which is composed of a prime motor, a coupler, a decelerator, gears, a lower cutter shaft, a disc-type cutter, a cutter-abut circular ring, a locking nut, a lower case seat, an end cover, a middle case body, an upper cutter shaft, an upper case cover, an end cover, a feeding hopper, long bolts, and a discharge hopper. The low noise twig grinder is characterized by being composed of three sections of lower case seat, middle case body, and upper case cover, the three sections are fastened together by four long bolts beside the bearing seat holes; the middle case body is provided with the lower cutter shaft and the upper cutter shaft; the upper cutter shaft and the lower cutter shaft is respectively provided with the disc-type cutter and the cutter-abut circular ring; the ends of the upper cutter shaft and the lower cutter shaft are provided with a pair of gears. During the process of grinding operation, the power of the primary motor is input to the cutter shaf