Steering column for a motor vehicle, and energy absorption device
View Patent ↗A steering column may include a sleeve unit in which a steering spindle rotatably mounted about a longitudinal axis, which sleeve unit is accommodated in a supporting unit so as to be displaceable in a longitudinal direction. An energy absorption device may be fitted between the supporting unit and the sleeve unit. The energy absorption device may include first and second bending elements that each comprise an elongate input limb positioned parallel to the longitudinal direction and connected at a free end to the supporting unit or the sleeve unit, and merges at another end into a bend to which a fixed limb is connected. The fixed limb may be connected to the other of the supporting unit or the sleeve unit. The second bending element may be formed in a mirror-inverted manner relative to the first bending element and may be positioned mirror-symmetrically adjacent to the first bending element.
1. A steering column for a motor vehicle comprising:
a supporting unit configured to be connected to a body of the motor vehicle;
a sleeve unit in which a steering spindle is rotatably mounted about a longitudinal axis of the steering spindle, the sleeve unit being accommodated in the supporting unit so as to be displaceable relative to the supporting unit in a longitudinal direction parallel to the longitudinal axis of the steering spindle; and
an energy absorption device disposed between the supporting unit and the sleeve unit, the energy absorption device comprising first and second bending elements that each comprise an elongate input limb that is parallel to the longitudinal direction and a free end and another end that merges into a bend to which a fixed limb is connected, wherein either the free end is connected to the supporting unit and the fixed limb is connected to the sleeve unit, or the free end is connected to the sleeve unit and the fixed limb is connected to the supporting unit,
wherein the second bending element mirrors the first bending element and is disposed adjacent to the first bending element,
wherein the second bending element is formed in a mirror-inverted manner with respect to the first bending element and is positioned mirror-symmetrically adjacent to the first bending element, and
wherein outer sides of the elongate input limbs of the first and second bending elements face away from the bends and lie parallel against one another.
2. The steering column of claim 1 wherein the elongate input limbs of the first and second bending elements are connected to one another by way of tearing-off elements.
3. The steering column of claim 1 wherein the fixed limbs comprise fastening elements for connecting the fixed limbs to the supporting unit or the sleeve unit.
4. The steering column of claim 3 wherein the fastening elements of the first and second bending elements are connected to each other perpendicularly to a mirror plane extending between the first and second bending elements.
5. The steering column of claim 3 wherein the fastening elements are connected to a bridge element.
6. The steering column of claim 1 wherein the fixed limbs extend to the free ends of the elongate input limbs and are connected to the elongate input limbs via breakaway elements.
7. The steering column of claim 1 wherein the energy absorption device is disposed between boundary elements that extend parallel to the longitudinal axis adjacent to the fixed limbs.
8. The steering column of claim 1 wherein each of the first and second bending elements is configured from a bending wire or a bending strip.
9. The steering column of claim 1 wherein each of the first and second bending elements is configured from a punched part or a bent part.
10. The steering column of claim 1 wherein the first and second bending elements are coated with a coating.