Drilling and bolting turret

摘要

A turret for mining appliances comprises a girder serving as a guide for a drilling carriage and a bolting carriage, which is mounted to pivot and slide along an axis at the end of a support arm. The girder is integral with two bearings, mounted to rotate freely and to slide on a tube provided with an anchoring point and integral with a support box articulated on the arm. The two bearings are connected by a second tube which passes through a connecting-rod which is mounted to rotate but prevented from moving longitudinally on the first tube, the pivoting of the turret being controlled by a jack pivotally connected on the one hand to the box and on the other hand to the connecting-rod. The withdrawal of the girder is controlled by another jack housed partly in the first tube.