Patent ID: 8820426

Claim:
A rotary weeding device, comprising: a cylindrical shell; a motor and a transmission connected to the motor, both of which are provided within the shell; a shaft driven by the transmission; and a composite cutter arranged at a distal end of the shaft, wherein the composite cutter includes a fixed cutter and a rotary cutter, the rotary cutter being connected to the shaft, provided at the front end of the fixed cutter, and rotated by the driving of the shaft about a longitudinal axis thereof; the fixed cutter being passed through by the shaft, adjacent faces of the fixed cutter and the rotary cutter being in shearing cooperation with each other, and the shearing being performed by relative rotation of the fixed cutter and the rotary cutter, wherein the rotary cutter includes a centrally provided tapering tip extending therefrom and tapering along the longitudinal axis, and cutting portions are extended downwards along the edges of the rotary cutter in the longitudinal direction of the rotary cutter.