SECURITY COUPLING IN PARTICULAR FOR MAIN DRIVETRAINS ON ROLLING STANDS

The invention relates to an overload security coupling, in particular for main drivetrains on rolling stands, forming a bridge between a toothed spindle section (1) and a spindle section (6), with an interference fit. According to the invention, the security coupling for axial overload may be combined with a rotational fixing against torsional overload, whereby the same is embodied with a rotating sliding sleeve (3), housing the spindle section (1) with internal toothing in an axially-displaceable manner at one end and enclosing the spindle section (6) with an inner sleeve (4) in the interference fit at the other end and the rear sleeve-like projection (13) thereof generates a fixed frictional connection which gives way in case of overload with a pressure sleeve (5) and a pressure gap (14), tensioned by pressure medium. In order to combine the security coupling of axial overload with a rotational fixing of torsional overload, the spindle section (1) is embodied with a fixed bearing point (2) and the spindle section (6) is embodied with a movable bearing point (8).