E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 4/18 (2006.01)
Patent
CA 2161424
A rock drilling machine of the self-feeding, integrated type which is designed to operate in situ in a drill hole. The rock drilling machine comprises a drive unit (1), an anchoring unit (2), and a feeding unit (3) which is active between the anchoring unit (2) and the drive unit (1). The drive unit (1) comprises a hydraulic power assembly (5, 8) at the rear end of the unit, a drill bit (21) which is rotatable at the front end of the unit, a guide (10) with a longitudinal cavity (23), which guide extends between the hydraulic powerassembly and the drill head and connects these non-rotatably to each other, a rotatable drive shaft (22) which extends from the hydraulic power assembly, through the said cavity in the guide, for rotation of the drill bit, and first securing devices (17) in order to be able to anchor the drive unit releasably in the drill hole. The anchoring unit (2) comprises at least one control element (30') around the said guide, and second securing devices (31, 31') in order to anchor the control element releasably by means of engagement against the drill hole wall, and the feeding unit (3) comprises at least three individually manoeuvrable hydraulic cylinders (60 - 62) between the anchoring unit and the drive unit for feeding the drill bit forwards in the desired direction, when the said first securing devices are inactive, and when the said second securing devices actively anchor the control element in the drill hole.
Nilsson Lennart
Sterner Lars
Borden Ladner Gervais Llp
Nilsson Lennart
LandOfFree
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