Auxiliary beam for an energy wood grapple and a system and method for harvesting energy wood

An auxiliary beam for an energy wood grapple, the auxiliary beam comprising:

• an elongated frame having two ends;
• a first fastening arrangement at one of the two ends of the elongated frame to arrange the auxiliary beam at an end of a boom assembly of an excavator, a position of the auxiliary beam being changeable with an arm assembly fitted to the end of the boom assembly;
• a second fastening arrangement arranged in the other of the two ends of the elongated frame to arrange the energy wood grapple in the auxiliary beam;
• a support leg fitted to the one of the two ends of the elongated frame and being arranged to receive a weight of the boom assembly and the excavator during a ground contact of the auxiliary beam, the support leg being arranged on an opposite side of the elongated frame relative to the first fastening arrangement;
• an actuator arranged in the auxiliary beam;
• and
• a movable jaw functionally pivoted in connection with the support leg and rotatably movable with the actuator, which, together with the support leg, is arranged to form a grapple that is openable and closable in a transverse direction relative to the elongated frame of the auxiliary beam for material handling that can be performed with the auxiliary beam for handling elongated energy wood parallel to the elongated frame with the grapple.