| 摘要 |
PURPOSE: A crusher is provided to freely select optional small pieces from formed small pieces each having different piece size from the others and crush the selected small pieces into fine particles, thus effecting good scattering efficiency of the crushed material. CONSTITUTION: The crusher is provided with a bucket-shaped crusher body frame(1); a space-provided screen formed by placing plural ringlike annular bodies having different sizes from each other, at their respective positions being at different levels from each other, in such a state that the sizes of the annular bodies are gradually decreased in the direction from the upper part of the bucket-shaped crusher body frame toward the lower part, so as to form a required space between every adjacent two of the annular bodies; a toothed annular plate(18) which has recessed teeth and projecting teeth, alternately formed in the inner peripheral surface of the toothed annular plate, and is place at the lowest bottom of the space-provided screen; a crushing shaft(2) placed at the center of the crusher body frame of the crusher; and an inclined screw strip(4) each of which is fitted to the crushing shaft right above the toothed annular plate and is used for, together with the toothed annular plate, further crushing formed fragments.
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