An apparatus for cutting plants

A - Human Necessities – 01 – D

Patent

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Details

A01D 34/73 (2006.01) A01D 34/416 (2006.01)

Patent

CA 2183996

In an apparatus for cutting plants with a cutter filament (36, 38) that spins about an axis of rotation and is wound onto a spool (13), in which a slide (16) locks up the spool (13) by means of a cam (26) so that it cannot rotate but can be released, in which by unlocking the spool (13) the length of the unattached end (37, 39) of the cutter filament (36, 38) can be adjusted, in which the slide (16) is moved into its unlocking position by the centrifugal force resulting from the increased rotational speed of the rotary drive when the cutter filament (36, 38) is shortened, the cutter filament adjustment is simplified and its functionality is improved, in that the slide (16) is held in its locking position relative to the spool (13) only by the equilibrium of forces of the mass supporting forces between it cam (26) and a stop (28) on the spool and can be moved into its unlocking position by centrifugal force, so that the spool (13) can rotate relative to the cup (10), the cam (26) being reset into its locking position by the mass supporting force on a guide surface (62) on the side of the spool, the stop surface (250) of the stop (280) having an increasingly flattened outline as the radial distance from the mid-point (12, 112) of the spool increases.

Un appareil destiné à couper des végétaux comprend un fil de coupe (36, 38) qui tourne autour d'un axe de rotation et qui est enroulé sur une bobine (13). Une coulisse (16) verrouille de manière amovible la bobine (13) au moyen d'une came (26) par rapport à des éléments de mise en rotation. En déverrouillant la bobine (13), on peut rajuster la longueur de l'extrémité libre (37, 39) du fil de coupe (36, 38). Lorsque le fil de coupe (36, 38) est raccourci, les éléments de mise en rotation tournent plus vite et la coulisse (16) est déplacée par la force centrifuge vers sa position de déverrouillage. Afin de simplifier le rajustement du fil de coupe et d'améliorer son fonctionnement, la coulisse (16) est maintenue dans sa position de verrouillage uniquement par l'équilibre des forces d'appui des masses qui s'exercent entre sa came (26) et une butée (28) côté bobine, et peut être déplacée vers sa position de déverrouillage par la force centrifuge, de sorte que la bobine (13) puisse tourner par rapport à la partie creuse (10). La came (26) est remise dans la position de verrouillage par la force d'appui des masses qui s'exerce sur une surface de guidage (62) côté bobine. La surface d'appui (250) de la butée (280) prend un contour de plus en plus plat à mesure que son écartement radial par rapport au centre de la bobine (12, 112) augmente.

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