This creation is related to a kind of grass trimmer structure,It is that the both ends of one body of rod of what are respectively equipped with a grip part and a mowing portion,Wherein the mowing portion has one can connect the driving group for setting the what body of rod and one be driven the blade of group actuation,Its characteristic is in what: driving system by a shell,One rotor and the organized structure of a stator form,Wherein outer casing bottom has a bottom plate,Blade system lock is set outside what shell bottom plate again,Furthermore rotor system ring sets the inner wall of what shell,And stator then sets what internal rotor,And outer casing top surface is covered with a cover board,Can be rotated together with shell for cover board,And closure,Thereby,The rotor and stator system for making driving group seal what interior of shell,Enable weeds or foreign matter that will not be involved in inside driving group,Furthermore can be promoted its waterproof,Dust-proof effect,Reduce the probability of rotor and stator damage.本創作涉及一種割草機結構，其係於一桿體之兩端分別設有一握持部及一割草部，其中該割草部具有一可接設於桿體之驅動組及一受驅動組作動之刀片，其特色在於：驅動組係由一外殼、一轉子及一定子所組構而成，其中外殼底部具有一底板，又刀片係鎖設於外殼底板外部，再者轉子係環設於外殼之內壁面，而定子則設於轉子內部，且外殼頂面覆設有一蓋板，供蓋板可連同外殼旋轉、且封閉外殼，藉此，使驅動組之轉子與定子係密封於外殼內部，令雜草或異物不致捲入驅動組內部，再者可提升其防水、防塵效果，減少轉子與定子損壞的機率。
