Drilling boom with telescopic manipulator - has feed with drifter, and servo-mechanisms for hydraulic cylinders

摘要

The drilling boom has a telescopic manipulator mounted on a bearing plate and able to turn round the vertical axis, while hinged to its free end is a feed with a drifter and with a crowd hydraulic cylinder. On the vacant end of the manipulator is a head carrying hydraulic cylinders for tilting and turning the feed in a horizontal plane and a rotational mechanism adapted to turn the feed. Hydraulic cylinders lift and turn the manipulator in a horizontal plane. The manipulator-actuating hydraulic cylinder and the feed crowd cylinder are controlled by respective servomechanisms, each having a servo drive rod with hydraulic cylinders, the rod-end space or piston-end space of each cylinder communicating with the respective rod-end space or piston-end space of the hydraulic cylinder controlled by the servomechanism, the spaces being equal in volume.