Drill drive arrangement

Abstract

The invention relates to a drill drive arrangement for driving an earth drilling tool, having at least one drive motor with a motor housing and a motor shaft, wherein a drive torque generated in the motor housing can be transmitted by the motor shaft, and a transmission which is downstream of the drive motor and is configured to convert the drive torque, wherein the transmission comprises an input transmission element, which receives the drive torque from the motor shaft of the drive motor, and an output transmission element, by means of which the drive torque converted by the transmission can be transmitted to the earth drilling tool or a drill string. According to the invention it is provided that the motor shaft of the drive motor is formed at least partially as a hollow shaft with an inner insertion space, on which at least one first torque transmission element is formed, and that the input transmission element of the transmission has a transmission gearwheel with an insertion shaft, on which at least one second torque transmission element is formed, wherein the insertion shaft is releasably inserted axially into the inner insertion space of the motor shaft in a matched manner to form a torque proof connection.

1 . A drill drive arrangement for driving an earth drilling tool, having
 at least one drive motor with a motor housing and a motor shaft, wherein a drive torque generated in the motor housing can be transmitted by the motor shaft, and   a transmission which is downstream of the drive motor and is configured to convert the drive torque, wherein the transmission comprises an input transmission element, which receives the drive torque from the motor shaft of the drive motor, and an output transmission element, by means of which the drive torque converted by the transmission can be transmitted to the earth drilling tool or a drill string,   wherein   the motor shaft of the drive motor is formed at least partially as a hollow shaft with an inner insertion space, on which at least one first torque transmission element is formed, and   the input transmission element of the transmission has a transmission gearwheel with an insertion shaft, on which at least one second torque transmission element is formed, wherein the insertion shaft is releasably inserted axially into the inner insertion space of the motor shaft in a matched manner to form a torque proof connection.   
     
     
         2 . The drill drive arrangement according to  claim 1 ,
 wherein   the at least one drive motor and the transmission are arranged on a drive carriage which is formed with a linear guide with which the drive carriage can be slided along a guide of a mast or a drill carriage mount.   
     
     
         3 . The drill drive arrangement according to  claim 1 ,
 wherein   several drive motors with gears are arranged, in particular on the drive carriage.   
     
     
         4 . The drill drive arrangement according to  claim 1 ,
 wherein   the drive motor is configured as an electric motor or a hydraulic motor, in particular as an axial piston motor.   
     
     
         5 . The drill drive arrangement according to  claim 1 ,
 wherein   the insertion space extends from a free end of the motor shaft up to into a region of the motor shaft which lies within the motor housing.   
     
     
         6 . The drill drive arrangement according to  claim 5 ,
 wherein   the insertion shaft inserted into the insertion chamber is located predominantly within the motor housing.   
     
     
         7 . The drill drive arrangement according to  claim 1 ,
 wherein   the insertion space is formed as a blind hole in the motor shaft.   
     
     
         8 . The drill drive arrangement according to  claim 1 ,
 wherein   the at least first torque transmission element and the at least one second torque transmission element form a torque-transmitting form-fit connection.   
     
     
         9 . The drill drive arrangement according to  claim 1 ,
 wherein   several first torque transmission elements and several second torque transmission elements are arranged, wherein a spline groove-shaft connection is formed between the insertion shaft and the motor shaft.   
     
     
         10 . The drill drive arrangement according to  claim 1 ,
 wherein   a first drive motor with a first transmission for driving an inner drill string and a second drive motor with a second transmission for driving an outer drill string are arranged.   
     
     
         11 . A drilling rig having
 a carrier device, which is configured to be movable in particular, and   a mast or a carriage mount along which a drive carriage is slidably mounted,   wherein   a drill drive arrangement according to  claim 1  is arranged on the drive carriage.