Ponsse Oyj

Tero Kaatrasalo

Toni Kohio

Eero Hotti

Markku Huttunen

Jouni Viitikka

Martin Garcia

A joint element provided with a swing dampener element and comprising a first joint part, a second joint part, and a swing dampener brake. The second joint part comprises a second end part which is detachably fixed to a first end part of the second joint part by a joint part coupling which is adapted to allow the second end part to be moved in an axial direction to a detached position in relation to the first end part, the detached position allowing replacement of active components of the swing dampener brake while the first end part remains bearing-mounted to the first joint part, the active components of the swing dampener brake comprising at least one first brake disc member and at least one second brake disc member.

Joint element provided with swing dampener brake, joint assembly comprising the joint element, and machine comprising the joint assembly

A rotation device arrangement includes a structure and a suspension part for suspending the rotation device from a boom. The structure includes a first inner body part and first conduits for leading a pressure medium through the first inner body part. A second outer body part is arranged at least partly around the first inner body part completely rotatably. First connections are fitted for leading the pressure medium through the second outer body part. Second conduits are fitted to at least one of an outer surface belonging to the first inner body part and an inner surface belonging to the second outer body part for leading the pressure medium from the first conduit to the first connections. A bearing is arranged to permit the second outer body part to rotate and to carry loads axially and radially. Second connections attach a direct-drive pressure-medium operated turning device to the structure coaxially to transmit torque.

Structure of a rotation device, and a corresponding rotation device, and a forest machine

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.

Stripping blade for a forestry machine

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

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Vieremä, Finland

Tero Kaatrasalo