| 摘要 |
<p>The rock-drilling apparatus is provided with a carriage (23) which on the one side carries a displaceable drilling drive (25) for a drill rod (31) and on the other side has means (45) for positioning the apparatus at the face. The cutter-side end of the drill rod (31) is mounted in a supporting plate (27) connected to the breast-side end of the carriage, and the drill rod (31) itself runs in a tubular sound-insulating member (70) arranged between the drilling drive (25) and the supporting plate (27). At the front face of the supporting plate (27), the drill rod (31) is surrounded by an insulating body (47) closing in a soundproof manner, the front margin (50) of which, intended to bear tightly on the surface (43) of the drilling location, is provided with an elastic bearing element. The insulating body (47) contains a liquid-injection nozzle (53) on the one hand for binding the drilling dust and a discharge opening (60) on the other hand for carrying away the drillings and the working liquid. The mounting (29) of the drill rod (31) in the supporting plate (27) is provided with a sealing arrangement which prevents liquid from passing from the insulating body (47) into the sound-insulating member (70) of the drill rod (31). <IMAGE></p> |
