Abstract: A threaded drive (18) for an electromechanical brake is shown, having a pot-shaped spindle nut with a base and a circumferential wall which has a thread (34) on the inside. In addition, the threaded drive (18) comprises a spindle (20) having an external thread, which projects with its external thread into the interior of the spindle nut, and a drive geometry (38) on the spindle (20) for transmitting a rotational movement to the spindle (20), which, via the external thread, moves the spindle nut axially. The spindle (20) has an end face facing the inner side of the base of the spindle nut and with at least one groove in the shape of an annular segment which extends concentrically with a central axis of rotation of the threaded drive (18) and ends in a stop wall. A stop attachment on the base of the spindle nut penetrates, at the end of the axial movement of the spindle nut relative to the spindle (20), the groove and strikes the stop wall.

Abstract: An actuator assembly (12), in particular for an electromechanical vehicle brake (10), is specified, having 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. 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). 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).

Abstract: An actuator assembly of an electromechanical vehicle brake has a linearly displaceable brake piston, a brake calliper unit having a holder for the brake piston, and a rotation prevention arrangement. The rotation prevention arrangement comprises a ring pushed onto a contact surface on the brake piston and connected in a rotationally fixed manner to the brake piston at an inner circumferential surface. The ring has at least one radially outwardly protruding securing projection, and a groove associated with the securing projection, which runs in the axial direction in the inner circumferential surface of the holder. A method for mounting and dismounting the brake piston is also disclosed.

Abstract: A ball screw drive for an actuator assembly of a vehicle brake is disclosed. The ball screw drive has a rotatably mounted recirculating ball screw spindle, on which a spindle nut open on one side is mounted. At least one thread groove is formed on the circumferential surface of the recirculating ball screw spindle, and a corresponding thread groove is formed on the inner surface of the spindle nut. A multiplicity of balls is guided in the thread grooves in such a way that rotation of the recirculating ball screw spindle brings about axial movement of the spindle nut along a rotational axis of the recirculating ball screw spindle. The spindle nut is hardened by ferritic nitrocarburizing. Moreover, a method for producing a ball screw drive and a vehicle brake are disclosed.

Abstract: There is set out an actuator subassembly (10) for a vehicle brake, having a linearly displaceable, unilaterally open brake piston (20) which is used to apply a brake liner to a brake rotor, having a brake calliper unit (12), in which a receptacle (22) having a running face (24) for the brake piston (20) is provided, and having a rotation prevention member which has at least one axially extending groove (38) in the running face (24) and at least one rotation prevention element (32) and by means of which the brake piston (20) is guided in the brake calliper unit (12) in a rotationally secure manner when the rotation prevention element (32) is received in the groove (38).

Abstract: A ball screw drive for an actuator assembly of a vehicle brake is disclosed, having a rotatably mounted recirculating ball screw spindle, on which a spindle nut open on one side is mounted. At least one thread groove is formed on the circumferential surface of the recirculating ball screw spindle, and a corresponding thread groove is formed on the inner surface of the spindle nut. A multiplicity of balls is guided in the thread grooves in such a way that rotation of the recirculating ball screw spindle brings about axial movement of the spindle nut along a rotational axis of the recirculating ball screw spindle. The spindle nut is manufactured from rolling bearing steel or from C steel.

Abstract: A ball screw drive for an actuator assembly of a vehicle brake is disclosed, comprising a rotatably mounted ball screw shaft on which a ball nut, which is open axially on one side, is mounted, wherein at least one thread is formed on a circumferential face of the ball screw shaft and a corresponding thread is formed on an inner face of the ball nut, wherein a large number of balls is guided in the threads in such a way that rotation of the ball screw shaft causes axial displacement of the ball nut along an axis of rotation of the ball screw shaft. The ball nut has a corrosion protection coating on an exterior thereof, at least on an end face thereof and in a region of a circumferential wall adjacent to the end face. A method for producing a ball screw drive is disclosed.

Abstract: A ball-screw drive for an actuator assembly of a vehicle brake is disclosed, comprising a rotatably mounted recirculating ball screw on which a cup-shaped screw nut is mounted. On a circumferential surface of the recirculating ball screw, at least one thread is formed. On the inner surface of the screw nut, a corresponding thread is formed, wherein, in the threads, a plurality of balls are guided in such a way that a rotation of the recirculating ball screw brings about an axial displacement of the screw nut along an axis of rotation of the recirculating ball screw. The screw nut is formed in two parts and has an inner part, in which the thread is formed, and an outer part, on which the circumferential surface of the screw nut is formed. The outer part has protection against corrosion. Furthermore, an actuator assembly and a method for producing a ball-screw drive are indicated.

Abstract: A ball-screw drive (16) for an actuator assembly (10) of a vehicle brake is indicated, comprising a rotatably mounted recirculating ball screw (18) on which a cup-shaped screw nut (20) is mounted. On the circumferential surface of the recirculating ball screw (18), at least one thread (26) is formed, and on the inner surface of the screw nut (20), a corresponding thread (28) is formed, wherein, in the threads (26, 28), a plurality of balls (30) are guided in such a way that a rotation of the recirculating ball screw (18) brings about an axial displacement of the screw nut (20) along an axis of rotation of the recirculating ball screw (18), The screw nut (20) is formed in two parts and has an inner part (36), in which the thread (28) is formed, and an outer part (38), on which the circumferential surface (34) of the screw nut (20) is formed, wherein the outer part (38) has protection against corrosion. Furthermore, an actuator assembly (10) and a method for producing a ball-screw drive (16) are indicated.

Abstract: An electric parking brake (100) has a spindle drive (28) which is electrically actuable and self-locking. The spindle drive (28) comprise a spindle (34) with an external thread and a spindle nut (30) with an internal thread which is in engagement with the external thread. Here, the external thread and the internal thread have a symmetrical thread profile. Furthermore, the profile edges of adjacent profile crests of the external thread merge directly into one another via a rounded portion in the profile trough which lies in between. Furthermore, a method for producing a parking brake (100) of this type is provided.