Adjustable steering column including energy absorption device for motor vehicle

Abstract

The object of the present invention is to provide an adjustable steering column (1) for a motor vehicle, the adjustable steering column (1) comprising: an adjustment unit (3) for mounting the steering shaft (2) such that The steering shaft (2) rotates around the longitudinal axis (7); and the support unit (4), the adjustment unit (3) is installed in the support unit (4) so ​​that the adjustment unit (3) can be arranged on the support unit (4) The motor-driven longitudinal adjustment driver (8) moves axially in the direction of the longitudinal axis (7) of the steering shaft (2), and the adjustable steering column (1) also includes a coupling to the adjustment unit (3) and the longitudinal adjustment driver (8) The transmission devices of the two are provided with an energy absorption device (29) in the transmission device, and the energy absorption device (29) absorbs energy when the adjustment unit (3) moves relative to the transmission device, and is provided in the transmission device There is a coupling device, which is connected to the adjustment unit (3) and to the transmission, and in the transmission, in the event of a collision, wherein a force exceeding a predefined limit value acts on the steering in the direction of the longitudinal axis (7) The shaft (2), the connection of the coupling means to the adjustment means (3) and / or the transmission is interrupted so that movement between the adjustment unit (3) and the transmission is permitted. Furthermore, the steering column disengages with a defined disengagement force in the event of a vehicle crash. To this end, the coupling device comprises a rod-shaped retaining element (33, 34) with a head (37, 42), which is fixed in a clamp (36, 360), wherein the Between the holder (36, 360) and the head (37, 42) is arranged at least one element which is fixed to the transmission or adjustment unit (3) and wherein, arranged in the holder (36, 360) The second thickness (d) of all elements between the head (37, 42) with the adjustment unit (3) moving relative to the transmission is greater than the second thickness (d) of all elements between the adjustment unit (3) and the transmission relative to The first thickness (D) when fixed in position to each other is small.

Description

technical field [0001] The invention relates to an adjustable steering column for a motor vehicle. Background technique [0002] Accordingly, the present invention relates to an adjustable steering column for a motor vehicle, the adjustable steering column comprising an actuation unit for mounting a steering shaft so that the steering shaft can rotate around a longitudinal axis, the actuation unit being carried installed in the unit so that the actuating unit can be axially displaced in the direction of the longitudinal axis of the steering shaft by means of a motorized longitudinal adjustment drive arranged on the carrier unit, in addition, the adjustable steering column includes a transmission, an energy absorbing device and coupling means, the transmission is coupled on one side to the actuating unit and on the other side to the longitudinal adjustment drive, the energy absorbing means are arranged to absorb energy in case of displacement of the actuating unit relative to...

AI Technical Summary

Problems solved by technology

The known steering column has the disadvantage that the disengagement force for breaking the riveted connection cannot be set exactly as required

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