Dual ratio drive for rotary shear
AssigneeSiemens Industry, Inc.
InventorPeiliang P. Zhang
Life of this patent
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Abstract
A dual ratio drive for a rotary sheer comprises a parallel pair of first shafts carrying freely rotatable first gears. A pair of second shafts are rotatable about axes parallel to the axes of the first shafts. Each second shaft carries a shear blade, and a second gear in meshed relationship with one of the first gears. A drive shaft is connectable to one of the second shafts by a first gear set having a high speed ratio, and is connectable to one of the first shafts by a second gear set having a low speed ratio. A clutch alternately engages one or the other of the first and second gear sets to drive the second shafts and their respective shear blades at the different speeds.
Claims8
A rotary dividing shear comprising:
- a pair of shearing blades;
- a dual ratio drive comprising;
- a parallel pair of first shafts;
- intermeshed first gears respectively rotatably mounted on said first shafts;
- a pair of second shafts rotatable about axes parallel to the axes of said first shafts, each of said second shafts having fixed thereto one of said pair of shearing blades, and a second gear in meshed relationship with a respective one of said first gears;
- a drive shaft arranged coaxially with one of said second shafts;
- intermeshed third and fourth gears respectively arranged coaxially with and rotatable relative to said drive shaft and one of said first gears;
- and
- clutch means operable in first and second modes to drive said second shafts at respective different first and second speeds,
- wherein the first mode causes a first internally splined coupling member to shift to a position that rotationally locks the drive shaft and said one of said second shafts,
- wherein the second mode causes a second internally splined member to shift to a position that rotationally locks the fourth gear and said one of said first gears.
Dependencies are inferred from the claim text.