Abstract: A boom structure on a work machine includes at least two boom branches and a main boom structure extending from their convergence area substantially in a working direction. Thus, the boom structure provides a fork-like structure.

Abstract: A vehicle or machine is suitable for operation on uneven or inclined surfaces, the vehicle or machine being a forest work unit and including at least three frame parts and two rotational planes, each of which rotational planes is arranged to be formed, in each particular case, on an interface between two successive frame parts of the vehicle or machine. The rotational planes are, in each particular case, planes perpendicular to the longitudinal axis of the vehicle or machine in the neutral position. The frame parts are thus arranged to be mutually rotatable in relation to said rotational plane.

Abstract: The invention relates to a method in the check weighing of a weighing system. In the method, a hoist (15) equipped with a weighing system (14) is used to lift a load (27), which is weighed, and the value measured by the weighing system (14) is recorded. In the method, the weighing system (14) is adjusted as required, on the basis of the recorded values. A real load (28), which is weighed when not moving, is used as the load (27). The same real load (28) is also weighed during a normal movement while moving. A reference value is defined from these two weighings of the same real load (28), on the basis of which the weighing system (14) is adjusted if necessary and/or the precision probably achieved by the weighing system (14) is estimated. The invention also relates to a software product and an arrangement in the check weighing of a weighing system, and materials handling equipment.

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: The invention relates to a bunk of a load space which bunk (12) includes a frame component (15), a support component (14) articulated to at least one end of the frame component (15), and two bunk arms (16, 17). At least one bunk arm (17) is composed of two or more plates (18, 19, 20) wherein one of the plates (18) is profiled to a curved form (10) on the transverse plane at the position of the load space and the other plate (20) is made parallel to the curved surface of the bunk arm (17) for widening the surface area of the bunk arm (17).

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: The invention relates to a bunk of a load space which bunk (12) includes a frame component (15), a support component (14) articulated to at least one end of the frame component (15), and two bunk arms (16, 17). At least one bunk arm (17) is composed of two or more plates (18, 19, 20) wherein one of the plates (18) is profiled to a curved form (10) on the transverse plane at the position of the load space and the other plate (20) is made parallel to the curved surface of the bunk arm (17) for widening the surface area of the bunk arm (17).

Abstract: The invention relates to a method and arrangement for measuring a timber piece (4) in a wood handling machine (1). Such a wood handling machine comprises booms (2) arranged in a base machine and a wood handling device (3) operating therein. In such a wood handling machine (1), a wood handling device (3) grips the timber piece (4) to be handled, after which one end of the timber piece is guided into a measuring carriage (5) in the wood handling machine by the wood handling device. The timber piece arranged in the measuring carriage is subjected to one or more observation measures by observation means provided in the measuring carriage.

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: The invention relates to an arrangement in a forestry machine (1), in which there are front and rear units (2, 3) and bogie wheels (14, 15) mounted on a set of swing axles (12), as well as a crawler mat (20) running around the bogie wheels (14, 15) and an auxiliary wheel (16) outside the set of swing axles (12), and in which the auxiliary wheel (16) is essentially permanently mounted in bearings in the front and/or rear unit (2, 3), so that, when the set of swing axles (12) turns, the tension of the crawler mat (20) is maintained by means of flexible elements connected to its perimeter, which are principally formed of the flexibility of the auxiliary wheel (16).

Abstract: The invention relates to a method and arrangement for measuring a timber piece (4) in a wood handling machine (1). Such a wood handling machine comprises booms (2) arranged in a base machine and a wood handling device (3) operating therein. In such a wood handling machine (1), a wood handling device (3) grips the timber piece (4) to be handled, after which one end of the timber piece is guided into a measuring carriage (5) in the wood handling machine by the wood handling device. The timber piece arranged in the measuring carriage is subjected to one or more observation measures by observation means provided in the measuring carriage.

Abstract: The invention relates to a harvester crane, which includes a set of booms, which are attached by means of a pedestal and rotating device to a chassis machine, in which the set of booms includes a main boom, which is pivoted at its lower end by a lower pivot to the pedestal; and an articulated boom, which is pivoted by an upper pivot to the opposite end of the main boom and which extends its path mainly forward from the main boom; operating devices, i.e. a lift device and a transfer device, operating the booms. The lower pivot of the main boom is located low down near to the rotating device and the pedestal is fork-shaped, the lower arm and the lift cylinder being located at least partly inside it.

Abstract: An arrangement in connection with a crosscutting saw of a harvester. Herein, a lattice-like structure composed of strips is provided in a saw casing of the crosscutting saw, the structure being substantially on the same section plane as the rotational movement of a chain of the crosscutting saw. The strips are arranged in the saw casing in such a manner that substantially each movement path tangent generated at a lower edge in a guide bar of the chain or at an outer track on the side of the saw casing in the chain wheel is arranged to encounter a surface in the strip. This provides a structure that enhances a controlled removal of sawdust or other pieces flowing to the saw casing during sawing.

Abstract: A loader includes a base equipped with a turning device, for attaching the loader to a carrier machine, a telescopic main boom including a frame pivoted on the base, and a telescopic component arranged to move linearly in relation to it and pivoted on the base, a hinged boom pivoted on the main boom, a lifting cylinder pivoted at its first end to the base and at its second end directly or indirectly to the main boom to operate it, an arm directly or indirectly attached to the hinged boom, pivoted to the main boom, a maneuvering cylinder disposed about the main boom between the frame and the telescopic component, the telescopic component is pivoted to the arm operating the hinged boom by the first pivot, the loader includes a link rod pivoted at one end to the frame of the main boom and at the other end to the second pivot of the said arm, which is at a distance from the said first pivot.

Abstract: A feed roller for use in feeding timber includes a body and has disposed around its periphery friction elements with anti-slip elements for improving the engagement between the feed roller and the log. A transfer element is arranged between the friction element and the body to transfer the motion of the feed roller to the friction element. The friction element swings around a pitch point formed in the transfer element, adhering to the surface of the log conveyed in the device and always directing an even pressure to the surface of the log. The transfer element preferably includes lugs, which are disposed in grooves at the bottom of the friction element.

Abstract: The present invention relates to a feed roller (1) by means of which a felled tree (2) trunk is fed into a timber harvester for delimbing. The apparatus comprises a drive wheel (4) and at least one transmission means (5) arranged at the outer circumference of and controlled by the drive wheel, the transmission means having engagement plates (3) provided with gripping means (14). The apparatus efficiently equalizes surface pressure exerted on the tree (2) trunk, even though the drive wheel is without cushioning rubber material. The transmission means (5) arranged on the drive wheel (4) is longer than the wheel perimeter. Consequently, the transmission means is arranged to form a plane surface between the drive wheel and the tree trunk, whereby a continuous surface pressing evenly against the tree trunk is formed on the wood side in the apparatus.