| 摘要 |
<p>An articulated support (10) to angularly move a drilling tool or mast (12) of a hydraulic drill (13) comprises a first rotary element (19) rotating around an axis of rotation (Y), to which said drilling tool (12) is connected, and linear actuator means (26) to determine the rotation of the drilling tool (12) around said axis of rotation (Y). The articulated support (10) also comprises a second rotary element (22) rotating around the axis of rotation (Y), directly connected to the linear actuator means (26), the second rotary element (22) being rotatably associable with the first rotary element (19). The articulated support (10) comprises constraint means (32) drivable so as to make the first rotary element (19) selectively solid with the second rotary element (22) in rotation around said axis of rotation (Y), and constraint seatings (36a, 36b, 36c), with which said constraint means (32) are able to couple on each occasion, made in different angular positions with respect to said axis of rotation (Y). The selective coupling of the constraint means (26) in determinate, and desired on each occasion, constraint seatings (36a, 36b, 36c), coordinated with the synchronous drive of the linear actuator means (26), allows to effect successive rotations of the second rotary element (22) selectively constrained to/released from the first rotary element (19), thus defining different reciprocal angular positions of the first rotary element (19) with respect to the second rotary element (22), and hence allowing to position the drilling tool (12) in desired angular operating conditions.</p> |
