DRILLING RIG FOR MAKING BLAST HOLES Russian patent published in 1994 - IPC

FIELD: mining industry. SUBSTANCE: drilling rig includes mast, drill column secured to support unit, swivel head with clamping device. Drill column is accommodated inside swivel head. Drilling rig has also device for lifting and feeding the swivel head, and device for lifting and feeding of support unit. Swivel head has motor with reducer located on carriage. Motor is connected through shaft with clamping device. Clamping device is made in form of wedge clamp driven by hydraulic cylinder. Swivel head lifting and feeding device is made in form of winch serving as drive of tackle block system with flexible links whose ends are connected with carriage upper and lower parts. Support unit lifting and feeding device is made in form of winch which serves as drive of tackle block system with flexible links whose ends are connected with upper and lower parts of supporting unit. EFFECT: higher efficiency. 2 dwg