Abstract: The invention relates to a forest machine, comprising a chassis having sides, a swing bogie mounted on bearings to the chassis, comprising a swing frame, second sides and at least two wheels, a swing bearing attaching the chassis to mount the swing bogie, a power transmission arranged through the swing bearing in connection with the chassis, a support formed by two pairs between the chassis and the swing frame, each pair having a protrusion as a support surface and a rail as a counter surface to transmit lateral forces between the chassis and the swing frame during contact between the two surfaces, wherein each pair is located at a distance from the swing bearing on separate side of the swing bearing, and in each pair, one of the protrusions and the rail is attached to the side of the chassis and other to the second side of the swing frame.

Abstract: The invention relates to a forest machine, comprising a chassis having a first chassis and a second chassis pivoted consecutively by a central pivot, first sets of wheels arranged in connection with the first chassis, an engine fitted in connection with the first chassis, a load space supported on the second chassis extending at least partly below an upper surface of the second sets of wheels, power transmission transmitting power to the second drive wheel of the second sets of wheels, wherein the second chassis includes two longitudinal parts attached to each other at least in front of the load space, which longitudinal parts are at a distance from each other in lateral direction of the forest machine at least over a partial length of the load space, in which forest machine the load space extends between the longitudinal parts in vertical direction of the forest machine.

Abstract: The invention relates to a forest machine, comprising a chassis having a first chassis and a second chassis pivoted consecutively by a central pivot, first sets of wheels arranged in connection with the first chassis, an engine fitted in connection with the first chassis, a load space supported on the second chassis extending at least partly below an upper surface of the second sets of wheels, power transmission transmitting power to the second drive wheel of the second sets of wheels, wherein the second chassis includes two longitudinal parts attached to each other at least in front of the load space, which longitudinal parts are at a distance from each other in lateral direction of the forest machine at least over a partial length of the load space, in which forest machine the load space extends between the longitudinal parts in vertical direction of the forest machine.

Abstract: The invention relates to a forest machine, comprising a chassis having sides, a swing bogie mounted on bearings to the chassis, comprising a swing frame, second sides and at least two wheels, a swing bearing attaching the chassis to mount the swing bogie, a power transmission arranged through the swing bearing in connection with the chassis, a support formed by two pairs between the chassis and the swing frame, each pair having a protrusion as a support surface and a rail as a counter surface to transmit lateral forces between the chassis and the swing frame during contact between the two surfaces, wherein each pair is located at a distance from the swing bearing on separate side of the swing bearing, and in each pair, one of the protrusions and the rail is attached to the side of the chassis and other to the second side of the swing frame.

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 shaft 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 shaft 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 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: 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: 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: A method and an arrangement in power transmission of a forest machine (1), the forest machine including a primary power source (5) for generating power required for moving and controlling the forest machine and/or actuators (6, 7) therein. In the present method and arrangement, at least part of the power generated by the primary power source (5) is converted into electric energy by a generator arrangement (8). This electric energy can be stored at least partly in an electricity storage unit (9), from which part thereof can be used, when required, for generating pressure medium-transmitted power for implementing a pressure medium-transmitted function of the forest machine (1) or at least one actuator (6, 7) therein.

Abstract: A method for controlling a power source (1, 10) of a forestry machine, wherein the power source utilizes directly or indirectly one or more work devices and/or handling devices (3, 4, 7, 8) positioned in the forestry machine and is controlled by a control unit (2). When the control unit in the forestry machine gives one or more work or handling devices a control command starting a change operation, it is transmitted substantially simultaneously to the power source. When arriving at the power source, one or more control commands requiring a power change of the power source affect control parameters of the power source, predicting the future load of the power source.

Abstract: A method and an arrangement in power transmission of a forest machine (1), the forest machine including a primary power source (5) for generating power required for moving and controlling the forest machine and/or actuators (6, 7) therein. In the present method and arrangement, at least part of the power generated by the primary power source (5) is converted into electric energy by a generator arrangement (8). This electric energy can be stored at least partly in an electricity storage unit (9), from which part thereof can be used, when required, for generating pressure medium-transmitted power for implementing a pressure medium-transmitted function of the forest machine (1) or at least one actuator (6, 7) therein.

Abstract: A method for controlling a power source (1, 10) of a forestry machine, wherein the power source utilizes directly or indirectly one or more work devices and/or handling devices (3, 4, 7, 8) positioned in the forestry machine and is controlled by a control unit (2). When the control unit in the forestry machine gives one or more work or handling devices a control command starting a change operation, it is transmitted substantially simultaneously to the power source. When arriving at the power source, one or more control commands requiring a power change of the power source affect control parameters of the power source, predicting the future load of the power source.