Rod section of a ground drilling rod, drive element, rod section system, and ground drilling device

Abstract

The invention relates to a rod section of a ground drilling rod, wherein the rod section is configured at the end side to form at least one plug connection and has at one end (a) a male connector with an outer contour or (b) a female connector with an inner contour, wherein, in cross section, the outer contour or the inner contour has a shape deviating from a circle.

1 . Rod section ( 5 ) of a ground drilling rod, wherein the rod section ( 5 ) is configured at the end side to form at least one plug connection ( 4 ) and has at one end (a) a male connector ( 12 ) with an outer contour ( 25 ) or (b) a female connector ( 14 ) with an inner contour ( 13 ), characterized in that, in cross section, the outer contour ( 25 ) or the inner contour ( 13 ) has a shape deviating from a circle. 
     
     
         2 . Rod section ( 5 ) according to  claim 1 , characterized in that the shape deviating from a circle is an oval shape, in particular an elliptical shape. 
     
     
         3 . Rod section ( 5 ) according to either  claim 1  or  claim 2 , characterized in that the shape of the outer contour ( 25 ) or the inner contour ( 13 ) is asymmetrical in cross section. 
     
     
         4 . Rod section ( 5 ) according to any of  claims 1  to  3 , characterized in that the male connector ( 12 ) or the female connector ( 14 ) has an opening oriented transversely to the longitudinal axis of the rod section ( 5 ) for inserting a bolt ( 16 ) which can be detachably connected to the male connector ( 12 ) or to the female connector ( 14 ), so that the oval shape is broken through. 
     
     
         5 . Rod section ( 5 ) according to  claim 4 , characterized in that a line intersects the opening which encloses an angle of less than 30° with an axis of symmetry of the inner contour ( 13 ) or the outer contour ( 25 ) or with an axis running perpendicular to the axis of symmetry of the inner contour ( 13 ) or the outer contour ( 25 ). 
     
     
         6 . Rod section ( 5 ) according to  claim 5 , characterized in that the line extends along a minor axis of an inner contour ( 13 ) or outer contour ( 25 ) designed as an ellipse. 
     
     
         7 . Rod section ( 5 ) according to any of  claim 4  and  5  or  6 , if dependent on  claim 4 , characterized in that the opening ( 26 ,  27 ,  28 ,  29 ) is part of a through hole ( 17 ,  18 ) which protrudes completely through the male connector ( 12 ) or the female connector ( 14 ). 
     
     
         8 . Rod section ( 5 ) according to any of  claims 4  and  5  to  7 , if dependent on  claim 4 , characterized in that the opening ( 26 ,  27 ,  28 ,  29 ) is configured to be threadless. 
     
     
         9 . Rod section ( 5 ) according to any of  claims 1  to  8 , characterized in that a latching element ( 15 ) for engaging the bolt ( 16 ) is arranged in the male connector ( 12 ), the longitudinal extent of the latching element ( 15 ) enclosing an angle of 0° to 45° with the longitudinal axis of the rod section ( 5 ). 
     
     
         10 . Rod section ( 5 ) according to any of  claims 1  to  9 , characterized in that at least one marking ( 22 ) is provided on the rod section ( 5 ) on an outwardly directed surface, which is in a predetermined angular relationship to the angular position of the shape of the inner contour ( 13 ) or the outer contour ( 25 ). 
     
     
         11 . Drive element for driving a ground drilling rod into the ground, which is configured to be brought into engagement with a rod section ( 5 ), wherein the drive element engaging with the rod section ( 5 ) is configured (a) as a male connector ( 12 ) or (b) as a female connector ( 14 ), characterized in that, in cross section, the outer contour ( 25 ) or the inner contour ( 13 ) has a shape deviating from a circle. 
     
     
         12 . Rod section system comprising two or more rod sections ( 5 ) according to any of  claims 1  to  10 , characterized by a bolt ( 16 ) having a circumferential groove ( 20 ) for inserting into the opening ( 26 ,  27 ,  28 ,  29 ). 
     
     
         13 . Ground drilling device having a drive element according to  claim 11 .