KNIFE FOR CLEANING TREES FROM BRANCHES FOR FORESTRY MACHINE

摘要

1. A knife for cleaning trees from branches for a forestry machine, which comprises a mount (12) for mounting a knife (10) hinged on the forestry machine (100) for cleaning trees from branches and at least partially curved cutting element (14) connected to the attachment unit (12) for removing branches from the tree, the cutting element (14) comprising a cutting surface (16), which at least partially corresponds to the tree trunk, and a supporting element (26) corresponding to the cutting surface connecting to the outside, relative to the tree, with side cutting surface (16), while the knife (10) for cleaning trees from branches made mainly by casting, characterized in that the said supporting element (26) is hollow. 2. A knife according to claim 1, characterized in that the hollow support element (26) is adapted to be used as a channel for a liquid / gas flow or for containing channels acting as channels for a liquid / gas flow for moving liquid / gas. 3. A knife according to claim 1, characterized in that the cutting element (14) contains at least one hole (40) extending into the central portion of the cavity (60) to hold the rod. A knife according to claim 1, characterized in that the upper edge (43) and / or lower edge (45) of the cutting element (14) contains a sharpened part (47) to simplify the casting of the knife (10), moreover, in the area of the sharpened part (47) the cutting surface (16) has a thickness of 2-10 mm, preferably 3-7 mm, in the direction of cleaning the tree from branches. 5. A knife according to claim 4, characterized in that said sharpened part (47) is continuous along the entire length of the cutting surface (16) and is a section with a size of 2-10 mm, preferably 3-7 mm. 6. A knife according to claim 1, characterized in that in the cutting element (14) is integral, essentially