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1. (WO2018138044) MOTOR-ADJUSTABLE STEERING COLUMN FOR A MOTOR VEHICLE AND ADJUSTMENT DRIVE FOR A STEERING COLUMN

Pub. No.:    WO/2018/138044    International Application No.:    PCT/EP2018/051428
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Tue Jan 23 00:59:59 CET 2018
IPC: B62D 1/181
F16H 25/24
F16C 33/58
Applicants: THYSSENKRUPP PRESTA AG
THYSSENKRUPP AG
Inventors: SPECHT, Jean-Pierre
HUBER, Sebastian
Title: MOTOR-ADJUSTABLE STEERING COLUMN FOR A MOTOR VEHICLE AND ADJUSTMENT DRIVE FOR A STEERING COLUMN
Abstract:
The invention relates to a motor-adjustable steering column (1) for a motor vehicle, having a supporting unit (2) which can be attached to a vehicle body and by which an actuation unit (3) is held in which a steering shaft (32) is mounted rotatably about a longitudinal axis (L), and having an adjustment drive (5, 6) which is connected to the supporting unit (2) and to the actuation unit (3) and by which the actuation unit (3) can be adjusted relative to the supporting unit (2), wherein the adjustment drive (5, 6) has a lead screw (52, 62) which engages in a shaft nut (51) and has an axis (G), a drive unit (55, 65) and a gearwheel (7) which can be driven by the drive unit (55, 65) in a rotary manner about the axis (G) and has a toothed section (72) which is located axially between two bearing faces (81) running around coaxially to the axis (G), wherein the gearwheel (7) is connected for conjoint rotation to the shaft nut (51) or to the lead screw (62), and wherein the lead screw (52, 62) and the shaft nut (51, 61) can be driven in a rotary manner relative to each other about the axis (G) by the drive unit (55, 65). To specify a steering column with an improved adjustment drive (5, 6) with an optimised gearwheel (7) which has improved mechanical properties, the invention proposes that the gearwheel (7) has a core element (71) to which two bearing rings (8) are connected which each have a bearing face (81) and are supported axially against each other. In an adjustment drive (5, 6) according to the invention, the gearwheel (7) has a core element (71) to which two bearing rings (8) are connected which each have a bearing face (81) and are supported axially against each other.