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Torque-splitting pinion gear for twin-screw machines comprising a first, direct-driven screw shaft, which has an output pinion meshing with a drive pinion provided on a coupling shaft, and also comprising a drive pinion provided on the second screw shaft, this pinion being axially offset towards the

Torque-splitting pinion gear for twin-screw machines comprising a first, direct-driven screw shaft, which has an output pinion meshing with a drive pinion provided on a coupling shaft, and also comprising a drive pinion provided on the second screw shaft, this pinion being axially offset towards the front relative to the output pinion of the first screw shaft and being drivable via an output pinion of the coupling shaft. In order to simplify such a gear and to optimize the driving of the two screw shafts the following features are used in combination: The output pinion of the coupling shaft meshes directly with the drive pinion of the second screw shaft; the coupling shaft is designed as a torsion bar; at least one of the pinions is rotatable and lockable in position relative to its shaft; the torsion resistance of the coupling shaft and the transmission ratio between first screw shaft, coupling shaft and second screw shaft are adjusted to the torsion resistance of the section of the first screw shaft lying between the output pinion of the first screw shaft and the drive pinion of the second screw shaft such that both screw shafts are always in proper phase relation with each other.

대표청구항 ▼

A torque-splitting gear assembly for twin-screw machines, comprising a direct-driven first screw shaft having a screw section (10b), a coupling shaft (20) parallel to said first screw shaft, said coupling shaft designed as a torsion bar, a first output pinion (10c) on said first screw shaft, a first

A torque-splitting gear assembly for twin-screw machines, comprising a direct-driven first screw shaft having a screw section (10b), a coupling shaft (20) parallel to said first screw shaft, said coupling shaft designed as a torsion bar, a first output pinion (10c) on said first screw shaft, a first drive pinion (20b) on said coupling shaft, said first drive pinion meshing with said first output pinion, a second screw shaft (30) parallel to the first screw shaft, said second screw shaft having a screw section (30b), a second drive pinion (30c) on said second screw shaft, a second output pinion (20c) on said coupling shaft, said second drive pinion meshing with said second output pinion, said second drive pinion being axially offset relative to said first output pinion towards the screw section (10b) of the first screw shaft, characterized in that the torsion resistance of the coupling shaft (20) and the transmission ratio between the first screw shaft, coupling shaft and second screw shaft are adjusted to the torsion resistance of a section of the first screw shaft lying between the output pinion (10c) of the first screw shaft and the drive pinion (30c) of the second screw shaft such that both screw shafts (10, 30) are always in a predetermined phase relation with each other, that at least one of said pinions (10c, 20b, 20 c, 30c) is rotatable and lockable in position relative to its shaft, that said first output pinion (10c) and said second drive pinion (30c) have the same diameter, that said first drive pinion (20b) and said second output pinion (20c) have the same diameter, and that two identical coupling shafts (20) are provided, said coupling shafts being symmetrically disposed with relation to the plane defined by the axes of the two screw shafts (10,30) and being spaced the same distance from said axes.