ADJUSTMENT DRIVE FOR A STEERING COLUMN, MOTOR-ADJUSTABLE STEERING COLUMN FOR A MOTOR VEHICLE, AND METHOD FOR ADJUSTING A BEARING ASSEMBLY OF AN ADJUSTMENT DRIVE

WIPO Patent Application WO/2020/011771

A8

The invention relates to an adjustment drive (5, 6) for a motor-adjustable steering column (1) for a motor vehicle, comprising: a lead screw (52, 62) with an axis (G), the screw engaging in a spindle nut (51, 61); a drive unit (55, 65); and a gear wheel (7) which is rotatably driven by the drive unit (55, 65) about the axis (G) and which is fixedly connected to the spindle nut (51) or the lead screw (62), said gear wheel being mounted to rotate about the axis (G), in a bearing assembly in a bearing housing (53, 63), between two outer bearing races (93) that are axially supported on the bearing housing (53, 63). The opposing faces of the outer bearing races (93) each have an outer bearing surface running coaxially with the axis (G), each of these bearing surfaces lying opposite a bearing surface (81) formed on the end face of the gear wheel (7). To achieve a smoother operation and a lower rate of wear, according to the invention at least one outer bearing race (93) is axially spring-loaded on the bearing housing (53, 63) by means of an elastic pre-loading element (94, 95) which exerts a pre-loading force (F) that axially braces the two outer bearing races (93) relative to one another.

HUBER SEBASTIAN (AT)
SCHACHT ARNE (AT)
SPECHT JEAN-PIERRE (CH)

EP2019/068368

January 07, 2021

July 09, 2019

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THYSSENKRUPP PRESTA AG (LI)
THYSSENKRUPP AG (DE)

B62D1/181; F16C33/58

THYSSENKRUPP INTELLECTUAL PROPERTY GMBH (DE)

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