Combined handheld bean grinder

The utility model discloses a combined type handheld bean grinder which comprises a bean bin, a grinding assembly and a rotating shaft are arranged in the bean bin, the grinding assembly comprises an outer grinding wheel and an inner grinding wheel, the rotating shaft penetrates through and is fixedly connected to the inner grinding wheel, a grinding area is formed between the inner grinding wheel and the outer grinding wheel, and the outer grinding wheel is fixedly connected to the grinding area. Elastic pieces are arranged between the outer peripheral wall of the outer grinding wheel and the inner peripheral wall of the bean bin, and the multiple elastic pieces abut against the outer grinding wheel and apply force towards the axis direction of the bean bin to the outer grinding wheel; the flour bin is detachably connected with the bean bin; the hand-cranking device and the electric device are connected to the bean bin in a replaceable mode and further connected with the rotating shaft in a coupling mode. Th