Steering column for a motor vehicle

摘要

A steering column for a motor vehicle has an adjustment unit (4) which bears a section of the steering shaft (1) and which, in the open state of a locking apparatus (7), is pivotable relative to a bracket unit (5) about a pivot axis (12) for adjustment of the steering column in an adjustment direction (11) for a height or tilt adjustment. The pivot axis (12) is formed by a spindle bolt (24) which can be mounted so as to be fixed with respect to the vehicle and which extends through a first and a second elongated hole (22, 23) of the adjustment unit (4). In the event of a vehicle crash, the adjustment unit (4) is displaceable relative to the spindle bolt (24) with displacement of the spindle bolt (24) in the elongated holes (22, 23), wherein, in a region situated between the first and the second elongated hole (22, 23) in relation to the direction of the pivot axis (12), there is arranged an energy absorption part (27) with which the spindle bolt (24), during the displacement thereof in the elongated holes (22, 23), interacts with plastic deformation of the energy absorption part (27) owing to exertion of pressure on the energy absorption part (27) and displacement of material of the energy absorption part (27).

主权项

1. A steering column for a motor vehicle comprising a rotatably mounted steering shaft and an adjustment unit which bears a section of the steering shaft adjoining a steering wheel-side end of the steering shaft and which, in an open state of a locking apparatus, is pivotable relative to a bracket unit about a pivot axis for adjustment of the steering column in an adjustment direction for a height or tilt adjustment and the pivoting of which relative to the bracket unit about the pivot axis is locked in a closed state of the locking apparatus, wherein the pivot axis is formed by a spindle bolt which can be mounted so as to be fixed with respect to the vehicle and which extends through a first and a second elongated hole of the adjustment unit, wherein prior to any vehicle crash the adjustment unit remains mounted fixedly with respect to the spindle bolt, and wherein, in the event of a vehicle crash, the adjustment unit is displaceable relative to the spindle bolt with displacement of the spindle bolt in the elongated holes, wherein in a region situated between the first and the second elongated holes in relation to the direction of the pivot axis, there is arranged an energy absorption part with which the spindle bolt, during the displacement thereof in the elongated holes, interacts with plastic deformation of the energy absorption part owing to exertion of pressure on the energy absorption part and displacement of material of the energy absorption part, whereby energy is absorbed as a result of the plastic deformation of the energy absorption part.