Patent ID: 9003939
Filing Date: 2015-04-14
Classification: B26D,B26F,Y10T

Abstract:
1. A rotary cutting apparatus, comprising: a frame; a first rotary device comprising a first shaft concentrically arranged about a first rotational axis and a first drum concentrically arranged on said first shaft, said first shaft being provided with a first pair of bearing housings arranged on either sides of said first drum; and a second rotary device comprising a second shaft concentrically arranged about a second rotational axis, and a second drum concentrically arranged on said shaft, said second shaft provided with a second pair of bearing housings arranged on either sides of said second drum; wherein said first and second rotary devices are arranged in said frame in such a way that said first and second axes are substantially horizontal and substantially in the same vertical plane, wherein said second shaft is connected to the frame via said second pair of bearing housings, wherein said first shaft is associated with said frame via said first pair of bearing housing said first pair of bearing housings are movable relative to said frame in a transverse direction to said first rotational axis by means of a force means, wherein means is provided for passive vibration attenuation of at least said first shaft, said means for passive vibration attenuation comprising a mass damper having a housing and a damping body movably arranged inside said housing, wherein said mass damper is associated with said first pair of bearing housings, and wherein both the bearing housing of the first shaft and the housing of the means for passive vibration attenuation are connected to an intermediate piece that is in sliding relationship with the frame.