Worm Drive Compared with the conventional oscillating granulator with the use of a belt to drive the worm gear and the worm to achieve motional transmission with complicated process, large power consumption and the risk of trackslip which impairs the granulation efficiency of the granulator, the utility model is simple in structure with the use of the motor to drive the worm and the worm gear which leads the roller to conduct forward or reverse reciprocating oscillation through the crank link. Moreover, the conventional oscillating granulator has the disadvantages of complex structure, large maintenance load and short service life, which result in an increase in manufacture cost to users. The utility model is suitable for granulation in the chemical and pharmaceutical fields.