Skf Gmbh

Horst-Manfred Ernst

Manfred Brandenstein

Armin Olschewski

Robert Stolz

Gunter Neder

In a worm gear comprised of a nut and a threaded spindle, the groove bottoms of the threads are provided with a central support projection, and a radially deeper region is provided adjacent the projection on both sides thereof. When radial forces act in the same direction at both ends of the worm gear, the projection serves as a radial support projection with sufficient axial play. By providing convexly curved thread flank surfaces, for example on the nut, the threads run under the same conditions also when the axes of the nut and spindle are inclinded to one another as a result of the application thereto of inclined forces. As a consequence, axial play is reduced. Clamping of the threads is avoided in this case, however, since the support projection hinders a wedging action between the threads of the worm gear.

Worm gear

An automatic adjustment arrangement for disk brakes has a flanged threaded nut and a threaded spindle threadedly coupled thereto arranged between the brake piston and the hand brake piston. The flange of the threaded nut is axially form-locked and radially displaceable relative to the brake piston. The threaded spindle is rotatably supported in a rolling bearing which is radially displaceable. The hand brake piston and threaded spindle are frictionally coupled. The extension of the adjustment member is produced by rotation of the threaded spindle. To avoid malfunctions, an automatic centering of the entire adjustment element relative to the brake piston as well as relative to the housing is provided. Manufacturing and assembly errors are thereby compensated for. The positions of the threaded spindle and threaded nut can be interchanged.

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Eltingshausen, Germany

Horst-Manfred Ernst