SUPPORTING-ROTARY APPARATUS FOR FELLING MACHINE MANIPULATOR Russian patent published in 2001 - IPC

FIELD: forestry. SUBSTANCE: supporting-rotary apparatus has rotary roller-type support with upper movable part and lower immovable part rigidly fixed on self-propelled chassis frame. Both parts are interconnected through system of double-armed levers mounted diametrically of apparatus, along longitudinal axis of manipulator. One of double-armed levers is pivotally connected with its one end to upper immovable part of support at point diametrically opposed to point of attachment of manipulator on rotary platform and is pivotally connected with its other end to other double-armed lever pivotally mounted on upper movable part of support. End of free arm of this lever contacts through roller with lower surface of immovable part or of supporting ring. Double-armed levers are pivotally interconnected through link of adjustable length. Longitudinal axis of roller is extending diametrically of apparatus. EFFECT: increased efficiency, improved rigidity, reduced dynamic loadings, and increased service life. 3 cl, 2 dwg