| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cutting blade of a stalk shredding machine with a structure wherein stalk gathering performance with a concave cutting part is easily kept while stalks are easily prevented from being twined around a cutting-blade driving shaft. Ž<P>SOLUTION: The cutting blade is formed as described below. An included angle θ1 between the front-side blade edge fe2 and the rear-side blade edge re2 of the concave cutting part 53 is an acute angle, and an included angle θ3 between the rear-side blade edge re2 and a straight line s tangent to a rotating circle of a circular disc 5A is larger than an included angle θ2 between the front-side blade edge fe2 and the straight line s tangent to the rotating circle of the circular disc 5A. The shape of a serrated blade edge e1 of a saw blade-shaped cutting part 52 is formed so as to have a forward tilting wave profile. The front-side blade edge fe2 of the concave cutting part 53 is formed along an extended line of the serrated blade edge e1 of the saw blade-shaped cutting part 52 on the front side of its rotation direction, and the rear-side blade edge re2 is formed along an extended line of the serrated blade edge e1 of the saw blade-shaped cutting part 52 on the rear side of its rotation direction. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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