Adjustment drive for a steering column, and steering column for a motor vehicle
AssigneesThyssenkrupp Presta AG, thyssenkrupp AG
InventorSebastian Huber
Life of this patent
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Abstract
An adjusting drive for a steering column for a motor vehicle may include a threaded spindle with an external thread that engages in a spindle nut and a drive unit that is coupled to the threaded spindle or the spindle nut such that the threaded spindle and the spindle nut are able to be rotatably driven relative to one another by overcoming a screw resistance. To permit an optimized adjustment over the entire adjusting region, the threaded spindle includes at least one actuator portion and at least one transition portion. The transition portion is configured such that the screw resistance of the spindle nut is lower in the transition portion than in the actuator portion.
Claims14
An adjusting drive for a steering column for a motor vehicle, comprising:
- a threaded spindle with an external thread that engages in a spindle nut, wherein the threaded spindle has an actuator portion and a transition portion;
- and
- a drive unit that is coupled to the threaded spindle or the spindle nut such that the threaded spindle and the spindle nut are able to be rotatably driven relative to one another by overcoming a screw resistance,
- wherein the transition portion is configured such that the screw resistance of the spindle nut is lower in the transition portion than in the actuator portion, and
- wherein the actuator portion includes a pretensioning element that is pretensioned against a thread of the spindle nut, wherein the transition portion is free of any pretensioning element or has a transition pretensioning element that is pretensioned against the thread of the spindle nut less than the pretensioning element is pretensioned against the thread of the spindle nut.
A steering column for a motor vehicle, comprising:
- a supporting unit that is attachable to a vehicle body and by which an actuating unit is held, with a steering spindle being rotatably mounted therein;
- and
- an adjusting drive that comprises:
- a threaded spindle with an external thread that engages in a spindle nut, wherein the threaded spindle has an actuator portion and a transition portion, and
- a drive unit that is coupled to the threaded spindle or the spindle nut such that the threaded spindle and the spindle nut are able to be rotatably driven relative to one another by overcoming a screw resistance,
- wherein the transition portion is configured such that the screw resistance of the spindle nut is lower in the transition portion than in the actuator portion, wherein the actuator portion includes a pretensioning element that is pretensioned against a thread of the spindle nut, wherein the transition portion is free of any pretensioning element or has a transition pretensioning element that is pretensioned against the thread of the spindle nut less than the pretensioning element is pretensioned against the thread of the spindle nut.
Dependencies are inferred from the claim text.