A blade mechanism for a mower is disclosed, which comprises a knife holder, two position-limiting assemblies and two blades. The two detachable blades are respectively installed and fixed on the two rotational sections of the knife holder by the two position-limiting assemblies. With the assembled structural design of the knife holder, the two position-limiting assemblies and the two blades of the disclosed blade mechanism, the disassembly and replacement of the blade can be performed alone in the maintenance process of the blade mechanism without need to completely detach the mower. Accordingly, the disclosed blade mechanism is deemed as an innovative and practical design, capable of greatly reducing the maintenance cost and time cost of the mower.一種割草機之刀片機構,包含一刀座、兩個限位組件,及兩個刀片。該等刀片是可脫離地被該等限位組件分別安裝固定於刀座的兩個旋轉區段,透過該刀座、該等限位組件與該等刀片之組接結構設計,使得本發明該刀片機構維修時,不需整個拆離割草機,僅需單獨拆換該等刀片,所以可大幅降低割草機維護成本與時間成本,是一種創新且相當實用的刀片機構設計。3‧‧‧刀座31‧‧‧旋轉區段310‧‧‧容刀缺口311‧‧‧側邊312‧‧‧鎖設孔4‧‧‧限位組件41‧‧‧限位板42‧‧‧鎖設件5‧‧‧刀片51‧‧‧轉切側邊52‧‧‧嵌裝側邊53‧‧‧定位孔530‧‧‧嵌入開口
