Method and device for assembling adjustable camshaft

Abstract

The present invention relates to a method and a device for assembling an adjustable camshaft which has at least one shaft segment comprising an outer shaft and an inner shaft extending concentricallythrough a passage bore of the outer shaft, wherein the method comprises at least the following steps: performing pre-positioning of the inner shaft, wherein the inner shaft is inserted, eccentricallyat least in sections, into the passage bore of the outer shaft, pushing a positioning element in a pushing-in direction through a first outer-shaft bore formed in a circumferential wall of the outer shaft, through an inner-shaft bore extending orthogonally with respect to the longitudinal axis of the inner shaft, and through a second outer-shaft bore formed in a circumferential wall of the outer shaft, in such a way that the positioning element projects out of the second outer-shaft bore, performing final positioning of the inner shaft, wherein the positioning element is moved counter to the pushing-in direction such that the inner shaft is oriented concentrically within the passage bore of the outer shaft.

Description

technical field [0001] The present invention relates to a method and a device for assembling an adjustable camshaft comprising at least one shaft segment having an outer shaft and an inner shaft extending concentrically through a through bore of the outer shaft. Background technique [0002] An adjustable camshaft is known, for example, from DE 20 2005 021 715 U1. An adjustable camshaft for valve actuation of an internal combustion engine comprises an outer shaft on which is located a first cam, the first cam being arranged rotationally fixed relative to the outer shaft, and an inner shaft wherein the second cam is connected in a rotationally fixed manner Extends through the outer shaft. The second cam is supported on the outer shaft on the outside. Once the phase of the inner shaft relative to the outer shaft is rotated, the control position of the first cam is shifted relative to the control position of the second cam. The phase of the inner shaft relative to the phase ...

AI Technical Summary

Problems solved by technology

[0003] Especially during the assembly of the corresponding adjustable camshafts, there are difficulties in arranging the adjustable inner shaft concentrically in the through hole of the outer shaft, and in particular arranging and fixing the inner shaft so that the two parts (i.e. the inner shaft and the outer shaft) have the same size in the radial direction

Especially in the case of an eccentric arrangement of the inner shaft inside the outer shaft, this may lead to friction between the outer surface of the inner shaft and the surface of the through-bore of the outer shaft, wherein there is also no guarantee that friction-free and operative movement of the inner shaft around it Reliable rotation or adjustment of the longitudinal center axis

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