Adjusting device having an adjusting mechanism arranged on a guide rail

An adjusting device for adjusting two vehicle parts relative to each other, the adjusting device comprising:

• a first guide rail longitudinally extending along a longitudinal axis, the first guide rail being formed by a base and a pair of legs connected to the base;
• a second guide rail movably arranged on the first guide rail and longitudinally extending along the longitudinal axis;
• an adjusting mechanism arranged between the legs of the first guide rail, which comprises a spindle nut, which can be set into a rotational movement about the longitudinal axis for driving the adjusting device;
• a spindle arranged in a rotationally fixed manner on the second guide rail and longitudinally extending along the longitudinal axis, which engages with the spindle nut in such a way that, when the spindle nut is rotated the first guide rail is moved along the longitudinal axis relative to the second guide rail;
• and
• a fastening device for fastening the adjusting mechanism to the first guide rail,
• wherein the fastening device comprises at least two supporting parts formed separately from each other,
• wherein, when viewed along the direction of the longitudinal axis, at least one of the at least two supporting parts is arranged in front of the adjusting mechanism and at least one of the at least two supporting parts is arranged behind the adjusting mechanism between the legs on the first guide rail, wherein the at least two supporting parts are welded to at least one of the base and a second of the legs of the first guide rail,
• wherein the at least two supporting parts each have a supporting section extending in a plane transverse to the longitudinal axis, wherein the supporting parts each flatly support the adjusting mechanism via a side of the supporting section facing the adjusting mechanism,
• wherein the supporting parts each reach into an opening in a first of the legs of the first guide rail, wherein the supporting parts are arranged with a clearance in the associated opening in the first leg of the first guide rail such that the supporting parts do not rest against the first leg of the first guide rail in a normal operating condition of the adjusting device, but are constituted to come into contact with the first leg of the first guide rail only during a deformation of the first guide rail or the supporting parts in case of a crash, and
• wherein the at least two supporting parts each comprise at least one form lock section extending from said supporting section and engaging with an opening on one of the base and the second leg of the first guide rail and extending through the opening to protrude from the base or the second leg at a side facing away from the adjusting mechanism arranged between the legs of the first guide rail.