Schaeffler Technologies Ag & Co .Kg

Patrick Ullmann

Peter Solfrank

Stefan Hess

Alexander Kern

A bearing arrangement is provided having a shaft () with a bearing journal (), and a needle bearing () which is arranged thereon and has a cage () and needle rollers () accommodated in the latter. The bearing journal is provided with a hardened and precision-machined inner raceway () for the needle rollers and steps back radially in relation to axial shoulders () of adjacent shaft sections (), and the axial shoulders serve as run-on surfaces for the axial end sides () of the cage fitted between the axial shoulders. In this case, relief grooves () are provided, with the relief grooves extending on both sides of the inner raceway and each being dimensioned in such a manner that, over the entire circumferential region of the axial shoulders, the axial distance (D) thereof from each other is significantly larger than the inner raceway width (B) existing therebetween.

Bearing arrangement with a shaft and a needle bearing

A method of making a compensation shaft () out of a drop-forged shaft blank () is provided. The compensation shaft includes a shaft section () with a base body () and a rib () with a height H starting from the base body. The method includes separating the forging ridges () formed in the die () by trimming the forged shaft blank into a shape close to the final contour of the base body at trimming points, with the distance Sbetween these trimming points being substantially smaller than the distance Sbetween the forging ridges prior to separation.

Method of making a compensation shaft

A compensation shaft for a multi-cylinder engine at least two bearing pegs and at least four unbalanced weight sections, two of the at least four unbalanced weight sections being arranged respectively, around each of the at least two bearing pegs, so that at least two units are formed, these at least two units being connected to each other by a connecting part, wherein two of the unbalanced weight sections are arranged asymmetrically around each of the two bearing pegs, and the connecting part is configured as a flexurally rigid and torsion-proof component.

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Herzogenaurach, Germany

Patrick Ullmann