| 摘要 |
<p>Electromechanical group for the automatic control of the horizontal and angular position. on the horizontal plane, of aerial cabs borne by extensible arms of hoist machinery. The group comprises: one or a pair of hydraulic motors associated to helicoidal wheels and endless screws activated to move in two directions; a support, fixed to the cab and hinged at the end of the extensible arm; electric pulses, generated by suitable sensors for controlling the horizontal position of the cab, are sent to an electronic central amplifying station which, in real time, activates hydraulic motors to stabilise the horizontal position of the cab. A second mechanical device, comprising a helicoidal wheel with an endless screw, connected to another hydraulic motor, is able to force angular movements on the cab, on the horizontal plane, in two directions and for more than 360 DEG . <IMAGE></p> |
