Compact boring apparatus for making earth bores
AssigneeTerra AG fuer Tiefbautechnik
InventorDietmar Jenne
Life of this patent
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Abstract
An earth boring machine 10 with a frame and a linearly movable slide 22 on the frame has an apparatus for holding and rotationally driving a boring rod 24, and a forward feed drive for moving the slide parallel to the boring direction. The machine with especially small space requirement creates a large force for movement of the slide 22 in and opposite to the forward feed direction. Moreover, the forward feed drive of the earth boring machine 10 has a rotationally drivable forward feed spindle 20 arranged on the frame 18, which spindle is received by a spindle nut non-rotationally connected with the slide 22.
Claims7
An earth boring mechanism with a frame (18) and a slide (22) linearly movable on the frame, the slide having an apparatus for holding (52,54,56) and for rotatably driving (58) a boring rod (24), and with a forward feed drive (60,62,64,66,68,70) for moving the slide (22) parallel to a boring direction, the forward drive (60,62,64,66,68,70) having a rotationally drivable forward feed spindle (20) arranged on the frame (18), which spindle is received in a spindle nut (82) non-rotatably connected with the slide (22), the slide (22) being movable relative to the spindle nut (82) along an axial stretch of the spindle which stretch of movement is limited by stops (98,104) fixed to the slide, the slide (22) being biased by a biasing element axially toward one of said stops, and said biasing element being a helical spring (84) designed as a compression spring which surrounds the forward feed spindle (22) and works between said spindle nut (82) and one of the axial stops (98,104).
Dependencies are inferred from the claim text.