Clamping device for a longitudinally adjustable and/or height-adjustable steering column of a vehicle

A clamping device for a longitudinally adjustable and/or height-adjustable steering column of a vehicle, comprising:

• a device part having circumferentially spaced first clamping cams and first depressions therebetween axially extending from an annular face thereof, wherein the first clamping cams have radially extending first oblique surfaces, and
• an actuating part which having circumferentially spaced second clamping cams and second depressions therebetween, wherein the second clamping cams have radially extending second oblique surfaces, and wherein the actuating part is movable relative to the device part between a release position, in which the first clamping cams are engaged with the second depressions, the second clamping cams are engaged with the first depressions, and the steering column is unclamped and longitudinally adjustable and/or height-adjustable, and a fixing position, in which the first and second oblique surfaces slide on one another, the device part and the actuating part move axially away from each, and the steering column is clamped and neither longitudinally adjustable nor height-adjustable,
• wherein the actuating part is adapted to swivel about an axis between the release position and the fixing position relative to the device part which is rotationally fixed with respect to the axis,
• wherein a damping unit is provided for damping a relative movement between the device part and the actuating part, wherein the damping unit includes a ring having a surrounding annular wall around a periphery of a body of the actuating part and a radial spacing between the first clamping cams, the second cams extend from a radial inner face of the annular wall, and the annular wall defines a gap between the device part and the actuating part,
• wherein the damping unit includes a first damping surface which is connected with the device part on an outer circumferential face of a body of the device part and arranged concentrically with the axis and a second damping surface which is connected with the actuating part on the radial inner face of the annular wall and arranged concentrically with the axis,
• the first and second damping surfaces being adjacent to each other at least in sections and being spaced apart from each other by the gap, and
• a high-viscosity fluid being provided in the gap for damping the relative movement between the device part and the actuating part, wherein the high-viscosity fluid contacts the device part and the actuating part.