Patent ID: 6370998
Filing Date: 2002-04-16
Classification: B23D,B26D,Y10T

Abstract:
A rotating-drum flying shear, comprising:a bearing frame; a pair of rotating drums each having shaft end portions rotatably supported by the bearing frame, and each having a shearing blade on an outer peripheral portion of the drum; rotating drum drive means for rotationally driving one of the pair of rotating drums; a pair of eccentric sleeves interposed, rotatably relative to each other, between the bearing frame and the shaft end portions of the pair of rotating drums; eccentric sleeve drive means for rotating the pair of eccentric sleeves relative to each other, thereby making the pair of rotating drums approach or separate from each other; rotating drum interlocking means for interlocking the pair of rotating drums only when the pair of rotating drums approach each other; and rotating drum synchronizing means for synchronously rotating the other of the pair of rotating drum by transmitting rotational force of the one of the pair of rotating drums to the other of the pair of rotating drums regardless of approaching positions or separating positions of the pair of rotating drums, wherein the rotating drum interlocking means has a pair of interlocking gears fixed to the shaft end portions of the pair of rotating drums, and the rotating drum synchronizing means has a pair of timing gears, for transmitting rotational force of said one of the pair of rotating drums to the other of the pair of rotating drums, opposed to the pair of interlocking gears in an axial direction in a mutually meshing state and rotatably supported by the bearing frame, and Oldham's couplings interposed between the pair of interlocking gears and the pair of timing gears.