Patent ID: 6938735

Claim:
In a electromechanical wheel brake device ( 10 ) for a motor vehicle with an electric motor ( 18 ) for actuating and releasing the wheel brake device ( 10 ), with a helical gear ( 16 ) converting the rotating motion of the electric motor ( 18 ) into a translating motion in order to press a brake pad ( 12 ) against a brake disc ( 13 ) and release it from the brake disc, the helical gear ( 16 ) having a nut ( 34 ) and a threaded spindle ( 24 ), the threaded spindle being comprised of a first part ( 27 ) and a second part ( 28 ) that interlock by means of positive engagement, with a clutch ( 38 ), which can be at least indirectly actuated in the event of a malfunction-induced release of the brake pad ( 12 ) from brake disc ( 13 ) and which operatively disengages the electric motor ( 18 ) from the second part ( 28 ) of the threaded spindle ( 24 ), the improvement wherein: the electric motor ( 18 ) engages the first part ( 27 ) of the threaded spindle ( 24 ), the second part ( 28 ) of the threaded spindle ( 24 ) engages with the nut ( 34 ) of the helical gear ( 16 ), the nut ( 34 ) of the helical gear ( 16 ) is moveable in the longitudinal direction along the threaded spindle ( 24 ) and is at least indirectly associated with a stop ( 35 ), which limits a restoring stroke, and the first and second parts ( 27 , 28 ) of the threaded spindle ( 24 ) are disengaged by means of the clutch ( 38 ) when the nut ( 34 ) of the helical gear ( 16 ) engages at least indirectly with the stop ( 35 ).