Tree harvesting machine, a tree harvesting monitoring system, a tree harvesting head, a method for controlling operation of a tree harvesting head and a method for monitoring operation of a tree harvesting machine
AssigneeLog Max AB
InventorMikael Eliasson
Life of this patent
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Abstract
The present disclosure relates to a tree harvesting machine (120) having a crane arm (118), wherein the crane arm (118) comprises a tree harvesting head (100; 200) arranged at a free end of the crane arm (118). The tree harvesting head (100) comprises a saw (104) and at least two feed wheels (102). The tree harvesting head (100) further comprises an electric motor (106a) arranged to drive the saw (104), and at least one electric motor (106b) arranged to drive the feed wheels (102). The present disclosure also relates to associated tree harvesting monitoring systems, tree harvesting heads, methods and computer programs.
Claims14
A tree harvesting machine having a crane arm, wherein the crane arm comprises a tree harvesting head arranged at a free end of the crane arm, wherein the tree harvesting head comprises:
- a saw and at least two feed wheels,
- an electric motor arranged to drive the saw,
- at least one electric motor arranged to drive the feed wheels, and
- an additional electric motor arranged to regulate how hard the saw is to press against the tree, said additional electric motor being controlled by load on the electric motor arranged to drive the saw to ensure that the mechanical stress experienced by a saw chain of the saw is within predetermined limits.
A tree harvesting head for a tree harvesting machine having a crane arm, wherein the tree harvesting head comprises a saw and at least two feed wheels, wherein the tree harvesting head further comprises an electric motor arranged to drive the saw, at least one electric motor arranged to drive the feed wheels, and an additional electric motor arranged to regulate how hard the saw is to press against the tree, said additional electric motor being controlled by load on the electric motor arranged to drive the saw to ensure that the mechanical stress experienced by a saw chain of the saw is within predetermined limits.
Dependencies are inferred from the claim text.