| 摘要 |
<p>Disc, roller or ball drilling tools which rotate in a percussive manner via an eccentric, are driven for milling and are provided with teeth, picks or the like (1, 8). The shaft (2) carrying the drilling tool or drilling tools is eccentrically mounted in a freely rotating manner in the driven rotating sleeve (3) and can be driven, among other things, via the gear pair (6, 7). In a particular embodiment, the number of revolutions of the shaft carrying the drilling tool or drilling tools can be alternatively regulated (17-22). In one type of construction, two tools work in the same or opposite directions (8-13). …<IMAGE>… </p> |
