Device for Inserting Foundation Piles

Abstract

A screwing device on a cantilever arm of a construction vehicle for screwing foundation installations into the ground has a suspension, a screw head, and an actuator. The actuator can be pivoted about two axes extending parallel to one another and transversely with respect to the longitudinal axis of the screw head. The articulation point on the screw head follows the motion of the pivoting lever on the longitudinal axis due to a migration of the articulation point from the longitudinal axis of the screw head occurring due to pivoting of the pivoting lever about the axes while screwing the foundation installation into the ground. The axes extend transverse to the longitudinal direction of the cantilever arm and are supplemented by at least one additional axis supported transversely with respect to said axes. This compensates for a migration of the articulation point in each direction.

1 . A screwing device for screwing foundation installations or the like into the ground as an attachment apparatus for attaching to a cantilever arm of a construction vehicle, said screwing device having a suspension, by means of which the screwing device can be articulated on an articulation point of the cantilever arm, and a screw head connected to the suspension, to which screw head the foundation installation to be screwed in can be coupled, and an actuator which is designed as a pivot lever, the actuator is articulated with its end nearest the cantilever on the articulation point of the cantilever arm and with its end nearest the screw head on an articulation point on the screw head and can be pivoted about parallel axes which extend through the articulation points and transversely with respect to the longitudinal axis of the screw head in such a way that, due to a migration of the articulation point from the longitudinal axis of the screw head occurring due to pivoting of the pivoting lever about the axes while the foundation installation is being screwed into the ground, the articulation point on the screw head follows the motion of the pivoting lever on the longitudinal axis. 
     
     
         2 . The screwing device according to  claim 1 , wherein the axes are directed transversely with respect to the longitudinal direction of the cantilever arm in such a way that it is possible to compensate for a migration of the articulation point out of the longitudinal axis of the screw head in the longitudinal direction of the cantilever arm. 
     
     
         3 . The screwing device according to  claim 1 , wherein the actuator is pivotable on at least one of its ends about a further axis extending transversely with respect to the longitudinal axis of the screw head and transversely with respect to the axes. 
     
     
         4 . The screwing device according to  claim 1 , wherein the actuator is pivotable on its ends about two further axes which are parallel to one another and extend transversely with respect to the longitudinal axis of the screw head and transversely with respect to the axes such a way that it is possible to compensate for a migration of the articulation point of the suspension out of the longitudinal axis of the screw head in any direction which occurs as the foundation installation is being screwed into the ground. 
     
     
         5 . The screwing device according to  claim 3 , wherein one or both of the pairs of axes is or are designed as universal joints. 
     
     
         6 . The screwing device according to  claim 2 , wherein the actuator has a rocker. 
     
     
         7 . The screwing device according to  claim 1 , wherein at least one drive is provided for the pivoting of the actuator. 
     
     
         8 . The screwing device according to  claim 7 , wherein the at least one drive has a controlling/regulating arrangement by means of which it is possible to compensate for the migration of the articulation point out of the longitudinal axis of the screw head. 
     
     
         9 . The screwing device according to  claim 8 , wherein the compensation takes place automatically by means of a control circuit which can be controlled mechanically or electrically. 
     
     
         10 . The screwing device according to  claim 8 , wherein the actuator has at least one tilt switch or a gyroscopic sensor from which the signals can be delivered to the drive by means of the controlling/regulating arrangement. 
     
     
         11 . An excavator with a screwing device according to  claim 1 , wherein the articulation point forms one of the axes of the actuator. 
     
     
         12 . The excavator according to  claim 11 , wherein the screwing device is connected securely and/or undetachably to the excavator. 
     
     
         13 . The screwing device according to  claim 1 , wherein the articulation point upon which the screwing device can be articulated is on a conventional quick coupling.