HAND GRINDER AND METHOD FOR FASTENING GRINDING DISK OF HAND GRINDER

摘要

The present invention comprises: a grinder body (10); a coupler (P) composed of a power transmitting member (20) coupled to a rotary shaft (11) of the grinder body (10), and a main body (30) provided between the grinder body (10) and the power transmitting member (20); and a grinding disk (50) composed of a grinding stone (51) in the form of a hollow disk and a coupling part (52) provided at the center of the grinding stone (51) and detachably coupled to the coupler (P), wherein a plurality of engagement protrusions (21) are radially arranged on the outer periphery of the upper end of the power transmitting member (20); a plurality of coupling pieces (53) are radially arranged on the inner periphery of a central portion of the coupling part (52); and when the main body (30) is rotated in a state where the grinding disk (50) is assembled such that the engagement protrusions (21) pass between the coupling pieces (53), the lower surface of the engagement protrusions (21) is seated on the upper surface of the coupling pieces (53) and the grinding disk (50) is fixed to the coupler (P).