LOGGING MACHINE Russian patent published in 1998 - IPC

FIELD: forestry, in particular, logging machines of manipulator type with harvester working head. SUBSTANCE: logging machine has gripping and cutting apparatus with working mechanisms. Kinematic joining part of working head housing and hydraulic manipulator handle has bracket, which is connected through rotation pin and rotation hydraulic cylinder is connected with handle. Immovable part of hydraulic engine is connected with bracket. Pin for rotating bracket relative to handle is in parallel with lever rotating pin and is positioned on handle in front of or behind hydraulic engine shaft rotation spindle. In case of behind arrangement of bracket rotating pin, lever is provided with cantilevered portion oriented toward gripping and working mechanisms, in case of front arrangement, bracket portion has cantilevered part oriented in similar way. In both cases, S/L relation is > 1, where S is distance between surface of cantilevered portion of lever, oriented toward gripping and working mechanisms, and pin of pivot joint of lever and working head housing, or S is distance between cantilevered portion surface oriented toward gripping and working mechanisms and pin of pivot joint of cantilevered portion and head housing; L is length of head housing from pin of working head and lever pivot joint to its end portion, with pivot joint connection position being determined by arrangement of gripping and working mechanisms. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 4 cl, 6 dwg