Cutting mechanism for garden shredders - consists of rotating cutter and fixed parabola-shaped counter cutter to produce scissor angle for pulling cut with conveyance of chopped material

摘要

The cutting mechanism has a driven rotary cutter (12) and a counter cutter (17) interacting with its cutter blade (121). The contour of the counter cutter (17) is a parabola open towards the rotary direction (14) of the cutter (12). The starting angle (B) of the cutter blade is such that the scissor angle (a) which is formed at the start of the cutter running over the counter cutter between the cutting blade and the parabola branch (172) of the counter cutter on the outside relative to the rotary axis is no smaller than 60 degs. up to the end of the run. The cutter is fixed interchangeable on a driven rotary support disc (10) in which a slit (15) is formed extending along the cutter blade. The counter cutter is formed on a counter holder plate (11) coaxial with the support disc and having a central cover (20) whose outer contour (19) changes into the inner parabola branch (171) of the counter cutter.