| 摘要 |
<p>Pair of saw blades with blade locking preventing function comprise a first blade (1) which rotates about an axis,and a second blade (7) which rotates about the same axis reversely, each blade has a blade body and cutting elements (2,8) which are provided along the periphery of the blade body, the cutting elements (2,8) have main cutting surfaces or lines (5,6) on the external edge,and the blades (1,7) run close and parallel to each other when rotated, the cutting elements (2,8) of at least one of the blades have aided cutting surfaces or lines which match another blade cutting elements and /or blade body in the inner side.Aided cutting surfaces or lines in the blades make the cutting fragment drop into the space between the two blades to be cut further, to be formed into fine powder, and to be thrown off by acentric force rapidly.</p> |
