Hydraulic core drill apparatus.

摘要

The hydraulic trepanning machine is for taking core samples of roadways etc., and partic. for drilling holes in concrete drain pipes. It comprises a frame (1) adjustably mounted on the boom sections (2, 3) of an excavator, and with means for positioning it as desired on the pipe etc. to be drilled (B). A trepanning drill bit (40, 41) moves up and down in the frame, being driven by a hydraulic motor and mounted with it on a slide. The height of the slide is positively controlled. The frame can be mounted on the excavator by means of a ball-joint (20, 21). The ball can be mounted on a protrusion on top of the frame, with a spindle passing through it on which a support hinges freely. The support in turn hinges on the excavator boom.