| 摘要 |
Variable length steering spindle includes an outer sleeve-form profile with a cross section departing from the circular form, and an inner profile with a cross section departing from the circular form, which can be slid with an end section into the outer profile. The inner circumferential contour of the outer profile and the outer circumferential contour of the inner profile are formed at least partially by arcuate sections and, toward the gap space between the outer profile and the inner profiles, these arcuate sections form preferably alternately convex and concave sections of the outer profile as well as also of the inner profile and the convex sections of the outer profile are disposed at least partially opposite the concave sections of the inner profiled and/or the concave sections of the outer profile opposite the convex sections of the inner profile. A slide sleeve is disposed in the gap space, which sleeve is held with respect to one of the two profiles torsion-tight and nondisplaceable in the longitudinal direction and which, together with the profile holding the slide sleeves, is displaceable with respect to the other profile in the longitudinal direction. In recesses of the slide sleeve, rolling bodies are disposed which, on the side of the slide sleeve on which is located in the mounted condition the profile longitudinally displaceable with respect to the slide sleeve, project at least in their no-load state from the slide sleeve and which, in the assembled state of the steering spindle, are each prestressed against a surface forming a raceway face of the profile, longitudinally displaceable with respect to the slide sleeve, and which are displaceable against a reset force into a direction directed away from the raceway face. If a limit value is exceeded of the torque active between the two profiles, contact occurs between the surface of the slide sleeve and the surface of the profile longitudinally displaceable with respect to such slide sleeve.
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