Abstract: A track assembly (15) for a track-driven vehicle, whereby the track-carrying beam (15) is arranged to hold a front and a rear wheel (16), one of which is driving, a plurality of carrying wheels about which wheels a continuous track travels, the track-carrying beam (15) is elongated and terminated by a first and a second gable end. The track-carrying beam (15) comprises an integrated compartment (37) and an opening (36) in one (35) of said gables, whereby the compartment (37) communicates with the surroundings via said opening (36), and whereby the opening (36) is arranged to allow for insertion of a transmission device for driving of said driving wheel (16) via the opening (36) in the compartment (37).

Abstract: A wheel-driven vehicle (1), comprising a front vehicle unit (1 A), a rear vehicle unit (1B), a power source (4), a first centre beam (8) and a second centre beam (9), a first driving means (10) and a second driving means (11) provided on each opposite sides of the first centre beam (8), a third driving means (13) and a fourth driving means (14), provided on opposite sides of the second centre beam (9), wherein the respective driving means (10, 11, 13, 14) comprises at least a driving wheel (16), a power-transmitting arrangement for transmission of power from said power source (4) to the driving wheel (16) that is included in each of the driving means (10, 11, 13, 14), wherein the power-transmitting arrangement comprises an engine (19) and a transmitting arrangement (20).

Abstract: The invention relates to a work machine and a method for monitoring a control system at a work machine (1a). According to the method, in-parameters (32, 34, 36, 38) are obtained in the form of signals from the control system, wherein the control system generates actual values on one or more out-parameters (42, 44) in the form of signals based on said in-parameters. A characteristic of the invention is that a digital flow of data, comprising both said in-parameters and out-parameters via a control bus (5a, 5b), is addressed to a RAM buffer memory (3b,3c), which is included in a personal computer (3a) onboard the work machine, which buffer memory in FIFO mode writes a data file (id:1.1-id1:n) of a predetermined size, which is saved in a non-volatile data support memory (3d).

Abstract: The invention relates to a load-carrying vehicle part with a first and a second wheel pair (10, 11), which are suspended in a respective bogie element (20) on each side of a frame member (14), a suspension (15) between each bogie element (20) and the frame member (14) on each side of the vehicle part to manipulate the frame member relative to the respective wheel pairs (10, 11), or support the frame member in a springing manner, each suspension (15) comprises a first and a second rocker arm (26A, 26B), wherein the first rocker arm is located in front of the second rocker arm viewed in the normal forward direction of driving of the vehicle part, that each rocker arm (26A, 26B) with its one end is pivotably in a joint (27, 27) in the frame member (14) and with its other end is pivotably in a joint (28, 28) in the bogie element (20) a first spring leg (25A) and a second spring leg (25B), wherein each spring leg with its one end (30) is articulately fastened to the frame member (14) and with its other end (31) is

Abstract: The invention relates to a load-carrying vehicle part with a first and a second wheel pair (10, 11), which are suspended in a respective bogie element (20) on each side of a frame member (14), a suspension (15) between each bogie element (20) and the frame member (14) on each side of the vehicle part to manipulate the frame member relative to the respective wheel pairs (10, 11), or support the frame member in a springing manner, each suspension (15) comprises a first and a second rocker arm (26A, 26B), wherein the first rocker arm is located in front of the second rocker arm viewed in the normal forward direction of driving of the vehicle part, that each rocker arm (26A, 26B) with its one end is pivotably in a joint (27, 27) in the frame member (14) and with its other end is pivotably in a joint (28, 28) in the bogie element (20) a first spring leg (25A) and a second spring leg (25B), wherein each spring leg with its one end (30) is articulately fastened to the frame member (14) and with its other end (31) is

Abstract: A wheel-driven vehicle (1), comprising a front vehicle unit (1 A), a rear vehicle unit (1B), a power source (4), a first centre beam (8) and a second centre beam (9), a first driving means (10) and a second driving means (11) provided on each opposite sides of the first centre beam (8), a third driving means (13) and a fourth driving means (14), provided on opposite sides of the second centre beam (9), wherein the respective driving means (10, 11, 13, 14) comprises at least a driving wheel (16), a power-transmitting arrangement for transmission of power from said power source (4) to the driving wheel (16) that is included in each of the driving means (10, 11, 13, 14), wherein the power-transmitting arrangement comprises an engine (19) and a transmitting arrangement (20).

Abstract: The invention concerns an arrangement for the guidance of flexible lines that run from a crane arm (3) through its end section (2) to a tool (4), that is suspended at the crane arm through a link arrangement (5) and a frame that is a component of a rotator (6) for rotation around a vertical first axis (A) and in a cardan manner around second (B) and third (C) horizontal axes, For the discrete and protected passage of hoses, it comprises a first holder (35) in an opening (3A) of the end section (2), a second holder (38) in a central region of the rotator (6), a first hose package (1A-1D) that extends between the said first (35) and second holders (38), a penetration (26) in a central region of the rotator (6) and permitting hydraulic fluid to pass through the rotator (6) and onwards to a lower part (18) of the same at least one of the said second (B) and third (C) horizontal axes comprises an “open joint”.

Abstract: A harvester (1), comprising a harvester aggregate (2) for felling, trimming and preparing tree trunks, a first measuring device (I) provided in connection with the harvester aggregate (2) for measuring of at least one dimension of a tree trunk. The harvester comprises a second measuring device (II) for measuring a feature of the first measuring device, whereby said feature is an attribute reflecting the capability of the first measuring device to measure said dimension correctly, and a control unit (11) configured to make a comparison between an actual value (a) of the measured feature and a target value (?) of said feature, whereby the target value is indicative of a state of the first measuring device, where its measurement of said dimension is considered to be correct.

Abstract: The invention relates to a work machine and a method for monitoring a control system at a work machine (1a). According to the method, in-parameters (32, 34, 36, 38) are obtained in the form of signals from the control system, wherein the control system generates actual values on one or more out-parameters (42, 44) in the form of signals based on said in-parameters. A characteristic of the invention is that a digital flow of data, comprising both said in-parameters and out-parameters via a control bus (5a, 5b), is addressed to a RAM buffer memory (3b,3c), which is included in a personal computer (3a) onboard the work machine, which buffer memory in FIFO mode writes a data file (id:1.1-id1:n) of a predetermined size, which is saved in a non-volatile data support memory (3d).

Abstract: This invention concerns a feed wheel arrangement intended to be used in a timber working head for at least one of felling, trimming, bark-peeling and cutting of a tree or tree trunk, comprising a frame to which feed wheels and grip fittings are mounted either fixed or in a manner that allows them to be removed. The feed wheel arrangement comprises a feed wheel with a power transfer arrangement lowered centrally in a jacket of the feed wheel, a motor arranged at a distance from the feed wheel, and a power transfer arrangement for the transfer of rotational force from the motor to the feed wheel, for the feed of the tree or trunk through the timber working head. The invention concerns also a timber working head, a crane and a timber working machine.

Abstract: The invention relates to methods and systems for stabilisation of a vehicle with a chassis including a rear wheel bogie, a pendulum shaft rotatable through rotary bearings around an axis parallel to the longitudinal direction of the vehicle, a tipping arrangement on which a crane is arranged, and a stabilisation arrangement having first and second hydraulic stabilisation actuators in the rear wheel bogie. The tipping arrangement includes a rotating disk and rotary bearings, such that the rotating disk and crane are rotatable around a vertical axis, and first and second hydraulic tipping actuators in connection with the rotating disk, that can be rotated around a horizontal axis. The first stabilisation actuator and first tipping actuator are in fluid-mediated connection, and the second stabilisation actuator and second tipping actuator are in fluid-mediated connection. The stabilisation actuators are controlled based on the pressure at the tipping actuators.

Abstract: The invention concerns a suspension device for a tracked vehicle, comprising a track assembly (10) at the side of a centre beam (14), comprising a track support beam (20), two wheels (21, 22), several support wheels (23) and an endless track (11) that runs in a plane of rotation (A, A), a first suspension mounting with which the support wheels (23) are suspended at the track support beam (20) in a manner that allows pivoting, a second suspension mounting comprising a combination of a first spring strut (25A) and a first pendulum arm (26A) and a second spring strut (25B) and a second pendulum arm (26B) with which combinations the centre beam (14) of the chassis is spring-damped at a forward and rear end of the track support beam (20).

Abstract: The present invention concerns a method for the indication of the sharpness of the teeth at a harvesting head at a forestry machine, an arrangement for the execution of the method, and a forestry machine for the use of the arrangement during execution of the method.

Abstract: The present invention concerns a method for the lateral levelling equipment of a timber working head at a forestry machine with a hydraulic system for the driving and regulation of the functions of the forestry machine, which forestry machine comprises a chassis with a driver's cabin and an arm to which a timber working head is fixed jointed and in a manner that allows rotation, the working head comprising levelling equipment and a regulator for the control and regulation of the lateral angle of the working head relative to the vertical direction, an arrangement for the execution of the method, and a forestry machine for the use of the arrangement during the execution of the method.

Abstract: The invention relates to methods and systems for stabilisation of a vehicle with a chassis including a rear wheel bogie, a pendulum shaft rotatable through rotary bearings around an axis parallel to the longitudinal direction of the vehicle, a tipping arrangement on which a crane is arranged, and a stabilisation arrangement having first and second hydraulic stabilisation actuators in the rear wheel bogie. The tipping arrangement includes a rotating disk and rotary bearings, such that the rotating disk and crane are rotatable around a vertical axis, and first and second hydraulic tipping actuators in connection with the rotating disk, that can be rotated around a horizontal axis. The first stabilisation actuator and first tipping actuator are in fluid-mediated connection, and the second stabilisation actuator and second tipping actuator are in fluid-mediated connection. The stabilisation actuators are controlled based on the pressure at the tipping actuators.

Abstract: A system includes: a detection means that detecting the weight of the load that is being manipulated is integrated into a load-sensitive guide pin that forms part of the axle bearing and that can output a signal that is proportional to the effect that is caused by the load, a power source to provide driving power for the load-sensitive guide pin, a sensor cable for the transfer of a driving voltage from the power source to the load-sensitive guide pin, a calculation means that is in signal-transfer connection with the load-sensitive guide pin in order to calculate the weight of the load that corresponds to the signal from the load-sensitive guide pin.

Abstract: An arrangement to capture passively a broken saw chain of a chain saw with a guide bar that is arranged such that it can pivot, including a stationary screen that forms part of a sawing box and that covers a rear part of the saw. In order to achieve an inexpensive and efficient protection there is arranged between an end surface of the screen and the guide bar an energy-absorbing brake member that is sufficiently elastic or flexible to receive the kinetic energy from a broken saw chain, to direct kinetic energy away from the chain and to regain its normal form after it has suffered an impact from and been deformed by the chain.

Abstract: The present invention concerns a method for the lateral levelling equipment of a timber working head at a forestry machine with a hydraulic system for the driving and regulation of the functions of the forestry machine, which forestry machine comprises a chassis with a driver's cabin and an arm to which a timber working head is fixed jointed and in a manner that allows rotation, the working head comprising levelling equipment and a regulator for the control and regulation of the lateral angle of the working head relative to the vertical direction, an arrangement for the execution of the method, and a forestry machine for the use of the arrangement during the execution of the method.

Abstract: The present invention concerns a method for the indication of the sharpness of the teeth at a harvesting head at a forestry machine, an arrangement for the execution of the method, and a forestry machine for the use of the arrangement during execution of the method.

Abstract: This invention concerns a feed wheel arrangement intended to be used in a timber working head for at least one of felling, trimming, bark-peeling and cutting of a tree or tree trunk, comprising a frame to which feed wheels and grip fittings are mounted either fixed or in a manner that allows them to be removed. The feed wheel arrangement comprises a feed wheel with a power transfer arrangement lowered centrally in a jacket of the feed wheel, a motor arranged at a distance from the feed wheel, and a power transfer arrangement for the transfer of rotational force from the motor to the feed wheel, for the feed of the tree or trunk through the timber working head. The invention concerns also a timber working head, a crane and a timber working machine.