Abstract: A solution for presenting information describing an operation of a forest work unit includes identifying a change affecting the operation of the forest work unit and storing information relating to the change, determining at least one key indicator describing the operation of the forest work unit, and presenting the key indicator describing the operation of the forest work unit and the changes taking place during a monitoring period.

Abstract: An apparatus comprising means for collecting data measured from operation and/or a state of a forestry machine and/or describing an environment thereof, which date may consist of one or more parameters, means for processing the collected data, and means for influencing, on the basis of the processed data, one or more parameters controlling the operation of the forestry machine or for conveying feedback or an instruction or a prompt to a driver to change his or her control.

Abstract: An arrangement in a boom system, specifically in a forest machine, includes at least two interlinked boom parts and at least one power transmission connected to the boom parts for moving the boom parts in relation to each other and the environment. The boom part includes an elongated body with a hollow structure and at least one set of joints intersected by turning axles for attaching the boom part to an adjacent structure, and at least one set of attachments for attaching an actuator controlling the boom system to the body, whereby at least one boom part is formed as a uniform, hollow piece made of fluid material. The cross-section of the body is made to cinch toward the midpoint of the body.

Abstract: An arrangement and method are provided for enabling rotation movement between a tandem or caterpillar axle and a body of a vehicle. This type of vehicle includes at least one body part that is provided with a tandem or caterpillar axle. At least one body part includes a main body and an auxiliary body connected to it to rotate around the longitudinal axis of the vehicle or an essentially parallel axis thereto. The tandem or caterpillar axle is connected substantially rigidly to the main body, and the body part has at least one actuator for controlling the rotation movement between the main body and auxiliary body. In this way, changes in the position and motion status of the auxiliary body, especially in relation to the rotation around the longitudinal axis of the vehicle, are arranged to cause in the actuator a pushing or pulling motion that steers the auxiliary body to a rotation movement for the purpose of arranging the auxiliary body to a substantially horizontal position.

Abstract: The invention relates to an arrangement in a forestry machine (100), in which arrangement there is —a chassis (12), —a single-axle set of wheels (13) pivoted to the chassis (12), and —at least one auxiliary wheel (18) fitted the outside the set of wheels (13), in order to increase the load-bearing capacity of the rear part (19) of the chassis (12). —The arrangement further includes —at least one support arm (20) arranged to carry the said auxiliary wheel (18) at its first end (22) and pivoted at its second end (24) to the said chassis (12) with the aid of a transverse shaft (23), —a support surface (36) attached to the chassis (12) and a counter surface (38) attached to the said support arm (20), for limiting the transverse movement of the support arm (20). —The invention also relates to a corresponding forestry machine.

Abstract: A modular crawler-track unit for a forest machine has an engine, a chassis with a pivot bearing and a crawler-track frame. A sleeve axle is attached to the crawler-track frame to support the crawler-track frame on the pivot bearing. A drive wheel is mounted in bearings in the crawler-track frame inside a circulation of a crawler mat. A support is arranged in the crawler-track frame inside the circulation to support a part of the crawler mat against the ground. A drive shaft is mounted in bearings in the crawler-track frame coaxially with the sleeve axle to transmit power to the crawler-track unit. A shaft mounted in bearings on the crawler-track frame pivots the drive wheel to the crawler-track frame at a distance from the drive shaft. A power-transmission is fitted between the shaft and the drive shaft to transmit power from the drive shaft to the drive wheel.

Abstract: A method for stabilizing at least one frame part of a forest work unit involves determining a moment applied by a payload of the forest work unit to a frame part to be supported and determining a magnitude and direction of at least one support moment needed at least for stabilizing the frame part on the basis of the moment applied by the payload to the frame part to be supported. An arrangement for stabilizing at least one frame part of a forest work unit comprises means for carrying out said determinations.

Abstract: An arrangement and method for measuring a piece of timber in a wood handling machine, wherein the piece is grabbed by a cutting head arranged to a set of booms in the wood handling machine, and the dimensions of the piece are measured by at least one measuring device in the wood handling machine. A measuring signal field formed by one or more measuring beams is also directed to the piece of timber with a monitoring device utilizing contact-free measurement, and a point cloud to be stored is provided by the measuring signal field it produces. The parts to be identified are identified from this point cloud, and a quantity to be measured is defined and formed of the information content of the point cloud. The obtained result is directed to a measuring system in the wood handling machine for further utilization.

Abstract: A boom structure (2) on a work machine (1) including at least two boom branches (2a, 2b) and a main boom structure (2c) extending from their convergence area (4) substantially in a working direction. Thus the boom structure (2) provides a fork-like structure.

Abstract: The invention relates to a system for controlling work lights in a forestry machine, which system includes a harvester head (16), attached to the set of booms (14) of the forestry machine (10), for felling and processing trees, at least one work light (20) attached to the harvester head (16) for illuminating the harvester head (16) and its surroundings, and control means (15) for controlling the operation of the work light (20). The control means (15) are the valve control unit (25) belonging to the harvester head (16) for controlling the valves of the harvester head (16), which control unit (25) is arranged to feed power and/or control the power feed to the said work light (20).

Abstract: An arrangement and method for measuring a piece of timber in a wood handling machine, wherein the piece is grabbed by a cutting head arranged to a set of booms in the wood handling machine, and the dimensions of the piece are measured by at least one measuring device in the wood handling machine. A measuring signal field formed by one or more measuring beams is also directed to the piece of timber with a monitoring device utilizing contact-free measurement, and a point cloud to be stored is provided by the measuring signal field it produces. The parts to be identified are identified from this point cloud, and a quantity to be measured is defined and formed of the information content of the point cloud. The obtained result is directed to a measuring system in the wood handling machine for further utilization.

Abstract: A method and an arrangement in a forest work unit, comprising storing power produced by a primary power source in an energy storing means in at least one first phase of a working cycle of the forest work unit by controlling a hydraulic pump-motor to convert at least some of the power produced by the primary power source into hydraulic power and by supplying it to the energy storing means to be stored therein. At least one second phase of the working cycle of the forest work unit comprises supplying stored power from the energy storing means for driving at least one tool.

Abstract: The invention relates to a system for controlling work lights in a forestry machine, which system includes a harvester head (16), attached to the set of booms (14) of the forestry machine (10), for felling and processing trees, at least one work light (20) attached to the harvester head (16) for illuminating the harvester head (16) and its surroundings, and control means (15) for controlling the operation of the work light (20). The control means (15) are the valve control unit (25) belonging to the harvester head (16) for controlling the valves of the harvester head (16), which control unit (25) is arranged to feed power and/or control the power feed to the said work light (20).

Abstract: An arrangement and method are provided for enabling rotation movement between a tandem or caterpillar axle and a body of a vehicle. This type of vehicle includes at least one body part that is provided with a tandem or caterpillar axle. At least one body part includes a main body and an auxiliary body connected to it to rotate around the longitudinal axis of the vehicle or an essentially parallel axis thereto. The tandem or caterpillar axle is connected substantially rigidly to the main body, and the body part has at least one actuator for controlling the rotation movement between the main body and auxiliary body. In this way, changes in the position and motion status of the auxiliary body, especially in relation to the rotation around the longitudinal axis of the vehicle, are arranged to cause in the actuator a pushing or pulling motion that steers the auxiliary body to a rotation movement for the purpose of arranging the auxiliary body to a substantially horizontal position.

Abstract: The invention relates to a method in a weighing system, in which method the mass of the bundle is weighed and recorded during both loading % and unloading mi_p of the bundle, during loading, the total loading mass mK_kok_j is calculated from the mass mi_c of one or more bundles weighed during loading and corrected using a correction factor Cj, the total unloading mass mp_kok_j is calculated from the mass mi_p of one or more bundles weighed during unloading, with the aid of the said total loading mass mK_COk_j and total unloading mass mp_kok_j?, a new corrected value Cj+1 is calculated for the correction factor Cj in order to adjust the weighing for the loading of the next load Kj+1. The invention also relates to a corresponding software product, an arrangement, and a material-handling machine.

Abstract: The invention relates to a crane comprising a base for attaching the crane to a harvester or similar work machine, a main boom having two ends, one end pivoted to the base, an articulated boom having two ends, one end pivoted to the said main boom (14), an actuator cylinder for moving the main boom relative to the base having a cylinder part, a second actuator cylinder for moving the articulated boom relative to the main boom, a pressure cylinder in connection with one actuator cylinder, arranged to follow this actuator cylinder in order to produce pressure for the second actuator cylinder, wherein the pressure cylinder is arranged to form an essentially coaxial multi-chamber cylinder with the actuator cylinder to be followed.

Abstract: The invention relates to a detector arrangement and method for determining a mutual position or a mutual state of motion of at least two structural parts of a mobile work machine. The arrangement comprises detectors configurable to determine at least in one direction of measurement at least two different measured variables in order to determine at least structural-part-specific position or state of motion information for each direction of measurement. The arrangement further comprises a data processing means for receiving measurement signals describing measured variables as well as for determining a mutual position or state of motion of the structural parts on the basis of the structural-part-specific position or state of motion information.

Abstract: The invention relates to a stripping blade for a forestry machine, which includes an attachment part for pivoting the stripping blade to the forestry machine, and an at least partly curved blade part attached to the said attachment part for stripping the branches of a tree, which blade part includes a blade surface that at least partly conforms to the trunk of the tree and a support structure conforming to the blade surface connecting to the outer surface of the blade surface relative to the tree, which said stripping blade is manufactured mainly by casting. The support structure is hollow.

Abstract: A method for stabilizing at least one frame part of a forest work unit involves determining a moment applied by a payload of the forest work unit to a frame part to be supported and determining a magnitude and direction of at least one support moment needed at least for stabilizing the frame part on the basis of the moment applied by the payload to the frame part to be supported. An arrangement for stabilizing at least one frame part of a forest work unit comprises means for carrying out said determinations.

Abstract: The invention relates to an arrangement in a forestry machine (100), in which arrangement there is—a chassis (12), —a single-axle set of wheels (13) pivoted to the chassis (12), and —at least one auxiliary wheel (18) fitted the outside the set of wheels (13), in order to increase the load-bearing capacity of the rear part (19) of the chassis (12). —The arrangement further includes —at least one support arm (20) arranged to carry the said auxiliary wheel (18) at its first end (22) and pivoted at its second end (24) to the said chassis (12) with the aid of a transverse shaft (23), —a support surface (36) attached to the chassis (12) and a counter surface (38) attached to the said support arm (20), for limiting the transverse movement of the support arm (20). —The invention also relates to a corresponding forestry machine.