Limited rotation slewing ring crane

A limited rotation slewing ring crane comprising:

• a pedestal;
• a column rotatively coupled about a first rotation axis to the pedestal by a slewing ring rotative coupling;
• means for limiting the relative rotation of the column with respect to the pedestal;
• and
• a rotation sensor adapted to measure a rotation angle of the column with respect to the pedestal;
• wherein said rotation sensor comprises:
• a tubular body, axially extending from the base of the column, rotatively integral with the same and axially protruding from the same towards the inside of the pedestal;
• a stationary body connected to the pedestal and a wheel, rotatable with respect to the stationary body about a second rotation axis, which is meshed by the tubular body, wherein the second rotation axis of the wheel with respect to the stationary body is offset with respect to the first rotation axis of the column with respect to the pedestal;
• means for sensing the angular position of the wheel with respect to the stationary body;
• and
• a plurality of hydraulic tubes and/or electric cables passing through said tubular body.