| 摘要 |
The invention is a device for a fluid-actuated drill unit that is attached to a feed cylinder (10) via a piston rod (11, 14).The device makes effective feed regulation of the drill unit possible.An actuatable slide (19) that runs axially along the cylinder (10), is moveable against the effect of a compliant force and can preferably be reached by the fluid in the piston (11) is designed with a stopper (24) to actuate a number of catches (25) that move in a radial direction between the cylinder (10) and the piston (11). The catches (25) are designed in such a way that when a specific fluid flow towards the drill unit (5) is exceeded, the slide (19) is actuated to disengage the locking between the piston (11) and the cylinder, thereby allowing the piston (11) to move in the desired direction of drilling (13).<IMAGE> |
