In a mobile soil-working device (1), having a machine frame (42), a drive (4)forat least one insertion tool (6) that can be moved up and down and insertedintothe ground (8) and pulled out again, the insertion tool (6) being in astartingposition at a predefined insertion angle (a) before insertion into the ground(8) andwhen in the ground (8) executing a pivoting movement, which is superposed onthe up and down movement, about a first pivot axis (10) in the direction of afirst pivot direction (12) owing to the movement of the machine frame (42) inthe direction of travel (A), and having a returning means (14), which iscoupledto the insertion tool (6) and moves the insertion tool (6) back into thestartingposition after its exit from the ground (8) by pivoting the insertion tool (6)in asecond pivoting direction (16) opposite to the first pivoting direction (12),thereturning means (14) is coupled to a protective means (18), which allowspivoting of the insertion tool (6) in the second pivoting direction (16)beyond thestarting position, such that the insertion tool (6) can be pivoted beyond thestarting position by pivoting of the insertion tool (6) in the second pivotingdirection (16) when it hits a hard object in the ground (8).
