发明公开
EP1407115A1 VERBINDUNG EINER ANKERSTANGE MIT EINEM BOHRGERÄT 有权
连接锚杆用钻头

VERBINDUNG EINER ANKERSTANGE MIT EINEM BOHRGERÄT
摘要:
The invention relates to an anchoring rod (6) for rock anchoring (self-drilling injection bolts), comprising an outer thread (9) for connecting the anchoring rod (6) to a drilling tool (1) via a coupling sleeve (5). The end of the anchoring rod (6), which is screwed into the coupling sleeve (5), comprises a section (12) which has a reduced diameter in comparison with the outer diameter of the anchoring rod (6). The free end of the section (12) of the anchoring rod (6) with the reduced diameter comprises a bevel (11). An open space (23) is thus formed between the inner surface of the coupling sleeve (5) and the reduced diameter end of the anchoring rod (6). Said space stops the anchoring rod (6) from becoming stuck in the coupling sleeve, even when the end of the rod is plastically deformed during the drilling process, so that the anchoring rod (6) can be unscrewed from the coupling sleeve (5) without applying significant force.
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