Clamping head arrangement

Abstract

The invention relates to a clamping head arrangement, in particular for clamping a drill rod element, having a plurality of clamping jaw elements, each of which has a clamping surface which is designed in particular for clamping contact with a contact side of the drill rod element, and a main body with guide tracks, along which the clamping jaw elements are displaceably mounted, wherein the guide tracks are angled to a centre axis of the clamping head arrangement, so that displacement of the clamping jaw elements along the guide tracks causes axial and radial displacement of the clamping jaw elements with respect to the centre axis. According to the invention it is provided that the clamping jaw elements are each designed with a cylindrical or partially cylindrical guide body, and that the guide tracks in the main body are formed as partially cylindrical guide channels, in each of which a clamping jaw element with the cylindrical or partially cylindrical guide body is displaceably mounted.

1 . Clamping head arrangement, in particular for clamping a drill rod element, having
 a plurality of clamping jaw elements, each of which has a clamping surface which is designed, in particular for clamping contact with a contact side of the drill rod element, and   a main body with guide tracks, along which the clamping jaw elements are displaceably mounted, wherein the guide tracks are angled to a centre axis of the clamping head arrangement, so that displacement of the clamping jaw elements along the guide tracks causes axial and radial displacement of the clamping jaw elements with respect to the centre axis,   wherein   the clamping jaw elements are each designed with a cylindrical or partially cylindrical guide body and   the guide tracks in the main body are formed as partially cylindrical guide channels, in each of which a clamping jaw element with the cylindrical or partially cylindrical guide body is displaceably mounted.   
     
     
         2 . Clamping head arrangement according to  claim 1 ,
 wherein   the partially cylindrical guide channels are open on the side facing the drill rod element to be clamped.   
     
     
         3 . Clamping head arrangement according to  claim 1 ,
 wherein   the main body is designed annularly with a free interior for receiving the drill rod element and   the guide channels are open to the interior.   
     
     
         4 . Clamping head arrangement according to  claim 1 ,
 wherein   the main body is designed in the form of a shaft or block with an outer circumferential side in which the partially cylindrical guide channels with the clamping jaw elements are arranged, wherein a tubular drill rod element can be clamped on an inner side.   
     
     
         5 . Clamping head arrangement according to  claim 1 ,
 wherein   the clamping jaw elements are connected to at least one actuator, which is mounted so as to be displaceable relative to the main body for displacing the clamping jaw elements.   
     
     
         6 . Clamping head arrangement according to  claim 5 ,
 wherein   the at least one actuator is axially displaceable by means of at least one actuating cylinder, in particular a hydraulic cylinder.   
     
     
         7 . Clamping head arrangement according to  claim 5 ,
 wherein   each clamping jaw element is connected to the actuator with a clearance via a connecting device.   
     
     
         8 . Clamping head arrangement according to  claim 7 ,
 wherein   a hook arrangement is formed on a rear region of each clamping jaw element to form the connecting device and engages in an associated receiving mount on the actuator.   
     
     
         9 . Clamping head arrangement according to  claim 1 ,
 wherein   this clamping jaw arrangement for forming a drill drive arrangement, in particular on a drill drive carriage, can be driven in rotation via at least one rotary drive.   
     
     
         10 . Drilling device for creating a borehole, in particular in a soil, with at least one drill rod element,
 wherein   a clamping head arrangement according to  claim 1  is provided.