Actuator assembly

An actuator assembly (12) for an electromechanical vehicle brake (10), comprising:

• a brake caliper (14) in which an intermediate space (16) is present for receiving a brake rotor (18),
• a ball screw drive which has an actuating slide (24) for applying a brake pad (20) onto the brake rotor (18) and an electromotively driven spindle (26) for the axial movement of the actuating slide (24), wherein the actuating slide (24) can be moved by axial displacement between an extended position and a retracted position,
• wherein the spindle (26) has a spindle shaft (28) and an output sleeve (30) which is separate from the spindle shaft (28) and which is arranged in toothed and torque-transmitting engagement on the spindle shaft (28), in the region of the output sleeve (30) the spindle shaft (28) having an external toothing (46) and the output sleeve (30) having an internal toothing (47), the external toothing (46) of the spindle shaft (28) being of crowned configuration, such that the output sleeve (30) and the spindle shaft (28) can be tilted relative to one another,
• wherein a threaded raceway (32) is formed on the external peripheral surface of the output sleeve (30) and an opposing raceway (34) for balls is formed on the internal peripheral surface of the actuating slide (24),
• wherein an electric motor is coupled in terms of drive to the spindle shaft (28) via a gear unit (36) in order to rotate the spindle shaft (28), for moving the actuating slide (24) between the retracted position and the extended position.