Abstract:
A guide bar (10) for a chain saw comprising two opposite elongate surfaces (11) and a slot formed between said opposite sides running along the periphery of the guide bar, in order to receive and retain the chain during cutting. At least one of the elongate surfaces is furrowed (13) across its surface in the direction of the cutting movement of the guide bar. The invention also relates to an apparatus for operating the chain saw in a forestry machine.
Abstract:
Die Erfindung betrifft Verfahren zum Sägen eines Langprofils (3), indem eine Sägescheibe (2) mit entlang eines kreisförmigen Außenumfanges der Sägescheibe (2) angeordneten Zähnen (6) frei rotiert wird, die Sägescheibe (2) aus einer frei rotierenden Stellung auf eine Außenwandung des Langprofils (3) vorgeschoben wird, und ein Nullzahn (Z 1 , Z 2 , Z 3 , Z 4 ) als erster der Zähne (6) in das Material der Außenwandung eingreift, wobei während der freien Rotation der Sägescheibe (2) Seitenschläge (d) der Zähne (6) bestimmt werden und ein Zahn (6) mit minimalem Seitenschlag (d) bestimmt wird und als Nullzahn (Z 1 , Z 2 , Z 3 , Z 4 ) verwendet wird.
Abstract:
A timber-working device (16) has pivoting arms (26,28) configured to grasp one (300) or more stems (302,304) to be processed, and a cutting device (38). A measurement device is configured to output a signal indicating a stem thickness measurement of the stem(s) (300,302,304) currently grasped by the pivoting arms (26,28), wherein the stem thickness measurement is dependent on the number of stems grasped. A stem count device is configured to output a signal indicating the number of stems currently grasped by the pivoting arms. The timber-working device (16) includes at least one controller (102,104) configured to receive the signal indicating the stem thickness measurement and the signal indicating the number of stems currently grasped by the pivoting arms (26,28), and determine the travel required of the cutting device (38) to sever the at least one stem, based at least in part on the indication of stem thickness measurement, and indication of the number of stems.
Abstract:
A timber-working device has pivoting arms configured to grasp one or more stems to be processed, and a cutting device. A measurement device is configured to output a signal indicating a stem thickness measurement of the stem(s) currently grasped by the pivoting arms, wherein the stem thickness measurement is dependent on the number of stems grasped. A stem count device is configured to output a signal indicating the number of stems currently grasped by the pivoting arms. The timber-working device includes at least one controller configured to receive the signal indicating the stem thickness measurement and the signal indicating the number of stems currently grasped by the pivoting arms, and determine the travel required of the cutting device to sever the at least one stem, based at least in part on the indication of stem thickness measurement, and indication of the number of stems.
Abstract:
Disclosed herein is an apparatus preferably coupled to a boom on a truck, the apparatus capable of a plurality of configurations for a variety of uses. In one configuration, the apparatus can perform rapid semi-precise cutting of vegetation. In another configuration, the apparatus can perform more precise trimming of one or more areas (e.g., limbs) and optionally use an aerial tank mounted at the far end of a boom assembly. Typically the aerial tank will be mounted just beneath the attachment of the cutter head assembly to the boom and above one or more insulation couplings. In some disclosed embodiments, the aerial tank that can be remotely controlled. The aerial tank can be used as a liquid chemical supply or cleaning liquid supply as needed for various tree trimming tasks.
Abstract:
The invention relates to a hydraulic arrangement in connection with a cutting device, in which the hydraulic arrangement (10) includes a hydraulic input line (12), a hydraulic motor (14), a return line (16) from the hydraulic motor (14), a hydraulic cylinder (20) for pressing the cutting device (100), a feed line (25) for the hydraulic cylinder (20), connected in parallel with the hydraulic motor (14) to the input line (12), and a directional control valve (34), a pressing line (24) and a lifting line (40). The hydraulic arrangement (10) further includes a throttle (18) for throttling the flow exiting from the hydraulic motor (14) in the return line (16), and a pressure valve (28) located between the said pressing line (24) and the pressure side of the said throttle (18), for controlling the hydraulic cylinder (20) on the basis of the speed of rotation of the hydraulic motor (14). The invention also relates to a corresponding method.
Abstract:
The invention relates to an arrangement (1) for marking a log end surface (4a) with a marking code during cutting of a log (4) and amethod for marking a log end surface (4a)with a marking code. The arrangement (1) is connected to a saw bar (3) comprising a plurality offluid distributing nozzles(6) in communication with a fluid container (16). The arrangement (1) further comprises acontrol unit (CU) arranged to control the flow of fluid through eachnozzle (6)based on log-related identification code. The invention is characterised in thatthe flow of fluid through eachnozzle (6)is controlled based on the movement of the saw bar (3) relative to the log in a cutting direction.
Abstract:
A tree harvester head (12) comprises first and second saws (32, 38), each of which comprises a cutting chain (42), and a lubrication system (44) configured to lubricate the cutting chains (42) of the first and second saws (32, 38). The lubrication system (44) comprises a source of pressurized lubricant (46) and a diverter valve (48) configured to divert flow of pressurized lubricant, from the source of pressurized lubricant (46), between the first and second saws (32, 38) for lubrication of the respective cutting chains (42).
Abstract:
Machine is significant with that the cutting assembly (7) comprises of the two circular saw blades, the first circular saw blade (19) and second circular saw blade (20), which are aligned basically in single plane and are separated from one another. Distance between axis of the circular saw blade (19) and the second circular saw blade (20) is greater than the diameter of the first circular saw blade (19) and there is the separator between them. Separator comprises from sheet (22) positioned in the plane of circular saw blades (19, 20) and the wedge (23) perpendicular to them.
Abstract:
The present invention relates to a chain saw (3) of a wood handling device (2) and to controlling the guide bar (4) in it. The guide bar is attached to a turning frame (8) rotatably arranged to a frame (5) of the chain saw through a fastening arrangement (9). The fastening arrangement of the guide bar and the turning frame are joined by at least one guide for controlling the guide bar during the movement in the direction of its longitudinal axis. The guide comprises opposite slide guides (12, 13) with opposite sliding (14) and mating surfaces (15) that form a form-locking joint joining the fastening arrangement and turning frame together. At least one of these is formed by a separate means arranged in the chain saw. This type of separate slide guide arranged in the chain saw (3) is arranged to be movable in at least one direction differing from the direction of travel allowed by the guide, which makes it possible to modify the clearance between the sliding surface and mating surface.