| 摘要 |
For the purpose of producing boreholes (2) in the combined drilling and setting process, a tube spile (4), which subsequently remains in the borehole (2), is driven into the latter via a coupling sleeve (6). Said coupling sleeve (6) is constructed as a combined thrusting, striking and ejecting adapter (10), and therefore ensures both the propulsion of the tube spile and the transmission of the power of the drilling machine to the drill rod (5) and thereby the drill bit (3). Said drill bit (3) is secured on the drill rod (5), or rather its front end (37), via an axial fixing system (55) against unintended detachment. |
