Patent ID: 8267194

Claim:
Rotation device for rotation of an equipment fastened at a region of a distal end of a boom which has a general longitudinal axis, and which is part of a boom device being fastenanble to a carrier for a mining or constructions work rig, wherein the rotation device includes: a first rotation unit with a first rotation motor adapted to rotate the equipment around said longitudinal axis, wherein the first rotation unit has a separating place at its outgoing rotational axis where said first rotation unit is releasably connectable to the boom, a second rotation unit with a second rotation motor which is arranged to rotate the equipment around an axis, which forms an angle with said longitudinal axis, wherein the second rotation unit has a separating place at its outgoing rotational axis where said second rotation unit is releasably connectable to the equipment, wherein said first and second rotation units are fastened to an angle unit included in the rotation device, wherein the angle unit has an intermediate portion defining an opening therein for providing access from outside to the rotation motors of the first and second rotation units, and a cover for selectively opening or closing the opening in said intermediate portion for providing or preventing access to said rotation motors of said first and second rotation units.