Patent ID: 7950318

Claim:
A driver for a twin cutting device, which comprises a first blade, which is non-rotatably arranged on a drive shaft to be rotated about an axis of rotation in a first direction, a second blade, which is non-rotatably arranged on a drive socket, which encloses the drive shaft, to be rotated about the same axis of rotation in a second direction opposite to said first direction, the two blades extending parallel to and close to each other, and a drive motor which is arranged to drive both the drive shaft and the drive socket, wherein the drive shaft constitutes a driving central shaft in a gear, and that said gear comprises a sun wheel, which is non-rotatably arranged on the drive shaft to be rotated by the same, at least a first planet wheel, which meshes with the sun wheel and is rotatable about an axis parallel to the axis of rotation, at least a second planet wheel, which is arranged to rotate simultaneously with the first planet wheel about the same axis, and a gear rim, which with internal teeth meshes with the second planet wheel and is non-rotatably mounted on the drive socket to rotate the same, wherein the gear comprises a case, which is arranged to be fixedly connected to the motor and has a rear wall, through which the drive shaft extends and which supports a planet wheel shaft for said planet wheels.