Abstract: A ball screw drive includes a threaded spindle and a spindle nut with a plurality of balls that circulate endlessly in the intermediate space between the nut and the spindle. A ball return guide guides balls at one location out of the helical ball race by a ball deflector and feeds the balls back via a transition channel and another ball deflector. The ball deflectors are arranged in radial through-openings in the lateral surface of the nut. One or more small metal plates are provided on the nut, and are arranged in and/or adjacent to the radial through-openings and offset inwardly away from the lateral surface, and span the ball return guide in a planar manner. The ball return guide is fixed in a target position in the lateral surface of the nut, and when fully assembled the small metal plates do not protrude beyond the lateral surface.

Abstract: A spindle nut (S) for a ball screw is conventionally designed as a hollow cylinder with a central-symmetrical middle longitudinal axis (Z). The spindle nut has an internal thread, which is designed as a ball groove (K) arranged on the cylinder inner surface. Pairs of load-relief bores (B) serve as substantially cylindrical channels for guiding the balls out of and into the ball channel (K) through the wall of the spindle nut. Each load-relief bore (B) is distinguished by a generatrix (L), which has an intersection point (C) with the thread base line of the ball channel (K) and constitutes the geometric continuation of the traveling path of a ball from the ball channel (K) into the load-relief bore (B). A tangent (T) to the cylinder surface (G) runs in a parallel manner at a spacing a >0 to the generatrix (L), both T and L being perpendicular to a common normal (R) to the middle longitudinal axis (Z).

Abstract: A ball screw including a threaded spindle and a spindle nut has a ball deflector arranged in an opening in the lateral surface of the spindle nut. The ball deflector is formed with an upper shell and a lower shell, the lower shell being arranged radially inwardly closer to the spindle nut longitudinal axis than the upper shell. The lower shell has a substantially half-shell-shaped contour. Both the upper shell and the lower shell are fastened in the spindle nut without any further, discrete mechanical fastening elements, and the ball deflector formed thereby does not protrude beyond the outer contour defined by the spindle nut.

Abstract: A ball screw drive (10) including a threaded spindle (12) and a spindle nut (14) which at least partially coaxially encloses the threaded spindle (12) and has a stop at an axial end face (18). A multiplicity of balls can circulate in the space (16) between the threaded spindle (12) and the spindle nut (14). A radial stop element (22) is connected to the threaded spindle (12) in a force-fitting manner and adapted to interact with the complementary axial end face (18) of the spindle nut (14). A bearing element is provided for receiving a first longitudinal end of the spindle nut (12). The radial stop element (22) and the bearing element are designed in combination as an integral bearing/stop element (24) which has two anti-rotation features (26, 28).

Abstract: A centering mechanism with a brake piston of a disk brake of a motor vehicle, with a spindle extending into a cavity in the brake piston, has dimensions that prevent a force equilibrium of a nut-spindle assembly moved completely out of the vertical position. A force vector of the gravitational force on the nut-spindle assembly extends within a contact surface between a nut and the brake piston. Thus, the brake piston can be easily assembled with the nut-spindle assembly.

Abstract: A spindle nut (S) for a ball screw is conventionally designed as a hollow cylinder with a central-symmetrical middle longitudinal axis (Z). The spindle nut has an internal thread, which is designed as a ball groove (K) arranged on the cylinder inner surface. Pairs of load-relief bores (B) serve as substantially cylindrical channels for guiding the balls out of and into the ball channel (K) through the wall of the spindle nut. Each load-relief bore (B) is distinguished by a generatrix (L), which has an intersection point (C) with the thread base line of the ball channel (K) and constitutes the geometric continuation of the traveling path of a ball from the ball channel (K) into the load-relief bore (B). A tangent (T) to the cylinder surface (G) runs in a parallel manner at a spacing a >0 to the generatrix (L), both T and L being perpendicular to a common normal (R) to the middle longitudinal axis (Z).

Abstract: A ball screw drive having a threaded spindle and a spindle nut which coaxially encloses it at least partially. The spindle nut receives a ball deflector and therefore has an imbalance caused thereby. A force transmission element is positively connected to the spindle nut. The outer surface of the spindle nut has a recess which is dimensioned and arranged to serve as a stop or groove for the force transmission element and also contributes to the imbalance compensation of the spindle nut. An imbalance compensation method is also provided by fixing the action surface as a surface recess such that the smallest width of the recess is at least 3 times as large as the maximum radial indentation thereof. The filling up of at least parts of the recess by the force transmission element is accounted for and the recess is lengthened along the spindle nut for imbalance reduction.

Abstract: A ball screw having a spindle nut (21), a threaded spindle, and a retaining element (23) is provided. The retaining element (23) is connected in a form-fitting, play-free manner to the threaded nut (21) by a projection (24) which fits around the outside of the threaded nut (21) in an end region. The threaded nut (21) and the retaining element (23) functioning as a force transmission member are first positioned precisely during manufacture and then connected by a form-fitting, in particular play-free connection, in particular by caulking, crimping, clinching or other deformation processes.

Abstract: A ball screw drive (10) including a threaded spindle (12) and a spindle nut (14) which at least partially coaxially encloses the threaded spindle (12) and has a stop at an axial end face (18). A multiplicity of balls can circulate in the space (16) between the threaded spindle (12) and the spindle nut (14). A radial stop element (22) is connected to the threaded spindle (12) in a force-fitting manner and adapted to interact with the complementary axial end face (18) of the spindle nut (14). A bearing element is provided for receiving a first longitudinal end of the spindle nut (12). The radial stop element (22) and the bearing element are designed in combination as an integral bearing/stop element (24) which has two anti-rotation features (26, 28).

Abstract: A ball screw drive having a threaded spindle and a spindle nut which coaxially encloses at least partially the threaded spindle. The spindle nut receives a ball deflector and therefore has an imbalance caused by the structure. A force transmission element is positively connected to the spindle nut. Here, the outer surface of the spindle nut has at least one recess which is dimensioned and arranged to serve as a stop or groove for the force transmission element and at the same time contributes to the imbalance compensation of the spindle nut. An imbalance compensation method is also provided by fixing the action surface as a surface recess such that the smallest width b of the recess is at least 3 times as large as the maximum radial indentation t thereof. The filling up of at least parts of the recess by the force transmission element is then taken into account and the recess is lengthened along the spindle nut for imbalance reduction.

Abstract: A ball screw including a threaded spindle and a spindle nut has a ball deflector arranged in an opening in the lateral surface of the spindle nut. The ball deflector is formed with an upper shell and a lower shell, the lower shell being arranged radially inwardly closer to the spindle nut longitudinal axis than the upper shell. The lower shell has a substantially half-shell-shaped contour. Both the upper shell and the lower shell are fastened in the spindle nut without any further, discrete mechanical fastening elements, and the ball deflector formed thereby does not protrude beyond the outer contour defined by the spindle nut.

Abstract: A ball screw having a spindle nut (21), a threaded spindle, and a retaining element (23) is provided. The retaining element (23) is connected in a form-fitting, play-free manner to the threaded nut (21) by a projection (24) which fits around the outside of the threaded nut (21) in an end region. The threaded nut (21) and the retaining element (23) functioning as a force transmission member are first positioned precisely during manufacture and then connected by a form-fitting, in particular play-free connection, in particular by caulking, crimping, clinching or other deformation processes.

Abstract: A bolt-like fastening element (30), which is preferably in the form of a drilling screw shaped by pressing and/or rolling, having a head portion (LK), which has a holding region (LH) and has a starting hardness, and also having an initial portion (LA), which adjoins the head portion (LK) by way of a transition region (LÜ) and is additionally inductively hardened. The fastening element (30) is produced by cold forming from a blank made of a carbon steel having a starting tensile strength of at least 800 N/mm2. The induction hardening of the fastening element extends only to the initial portion thereof, i.e. in the case of a drilling screw to the drill bit (24) and the first turns of the thread (36). After the induction hardening, the drilling screw substantially has the starting tensile strength and is ductile in the head portion (LK).