Brush cutter work head with pivotable shroud

Details Brush cutter work head with pivotable shroud Brush cutter work head with pivotable shroud

A - Human Necessities

01

D

A01D 34/86 (2006.01) A01D 34/73 (2006.01) A01G 23/093 (2006.01)

Patent

CA 2141227

A work head (20) has a main housing (28) pivotably mountable on a boom (14) of a brush cutting machine. A cutter wheel (64) is rotatably mounted on the housing (28) to rotate about a vertical axis (X). A shroud (38) is pivotably mounted on the housing (28) to pivot about the same axis (X). The shroud (38) substantially surrounds the cutter wheel (64). The inner race (76) of an annular bearing (74) is secured to a bottom wall (36) of the housing (28). The outer race (80) of the bearing (74) is secured to the top wall (40) of the shroud (38). A hydraulic motor (88) mounted on the housing (28) carries a pinion gear (92) that engages teeth (84) on the outer race (80) to pivot the shroud (38). A fixed gripper jaw (46) depends downwardly from the housing (28) adjacent to the shroud (38). An upper jaw (50) is pivotably mounted on the housing (28) to cooperate with the fixed jaw (46) to grip cut brush and other debris.

Unité de travail (20) comportant un boîtier principal (28) se montant de manière à tourner sur le bras (14) d'une débroussailleuse. Une roue à couper (64) est montée sur le boîtier (28) de manière à tourner autour d'un axe vertical (X). Une coiffe (38) est montée sur le boîtier (28) de manière à tourner autour du même axe (X). La coiffe (38) entoure presque totalement la roue à couper (64). Le chemin de roulement intérieur (76) d'un roulement radial (74) est fixé à la paroi inférieure (36) du boîtier (28). Le chemin de roulement extérieur du roulement radial (74) est fixé à la paroi supérieure (40) de la coiffe (38). Un moteur hydraulique (88) monté sur le boîtier (28) porte un pignon d'engrenage (92) engageant les dents (84) situées sur le chemin de roulement extérieur (80) pour faire tourner la coiffe (38). Une mâchoire à pince fixe (46) est suspendue du boîtier (28) à proximité de la coiffe (38). Une mâchoire supérieure (50) est montée de manière à tourner sur le boîtier (28) afin de collaborer avec la mâchoire fixe (46) pour saisir les broussailles et d'autres débris.

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