Rock drilling machine

Details Rock drilling machine Rock drilling machine

E - Fixed Constructions

21

B

255/50

E21B 3/00 (2006.01) E21B 3/02 (2006.01) E21B 7/02 (2006.01) E21B 7/20 (2006.01) E21B 19/08 (2006.01)

Patent

CA 1061324

ABSTRACT OF THE DISCLOSURE A rock drilling machine, e.g. for drilling with a diamond core bit, has a first power rotated chuck for gripping the drill string. The chuck can be swung offset the drilling axis into a position to grip an in- put shaft of a reduction gearing coupled to a second chuck. The first chuck and its motor can thus rotate also the second chuck which is used for ex- ample for drilling down a borehole lining pipe. The two chucks are mounted on a common slide that is power feedable back and forth along a feed beam or mast.

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