| 摘要 |
PURPOSE: A double blade for lawn mower is provided to eliminate lawn grass or long pool with a big blade of upper end, to remove a stem of clover with a small blade located near the ground at once, and finish task more clearly in a short time. CONSTITUTION: A double blade for lawn mower comprises: an existing blade installed in a rotary shaft of lawn mower; a ring(2) installed to the bottom; an extension axis(3) installed to the bottom, in which a screw nut and a bolt of left screw line are united; a small blade(4) with a 1/2 long of the existing blade installed to the bottom; a cap-type screw nut(5) of the left screw line installed to the bottom. The extension axis consists of upper portion in which the screw nut of left screw line is formed and bottom portion in which the bolt of left screw line is united. |
