SPINDLE DRIVE FOR A CLOSURE ELEMENT OF A MOTOR VEHICLE
The invention relates to a spindle drive for a closure element (2) of a motor vehicle (3), wherein a drive unit (4) and a downstream spindle/spindle nut mechanism (5), comprising a spindle (6), a spindle nut (7) and a spindle guide tube (8), for producing drive movements along a drive longitudinal axis (9) are provided, wherein the spindle drive (1) has drive connections (13, 14) for passing out the drive movements and being adjustable with respect to one another, wherein a first drive connection (13) is connected to the spindle guide tube (8) in an axially fixed manner, wherein a second drive connection (14) is connected to the spindle (6) in an axially fixed manner, wherein a drive spring (15) for producing drive movements along the drive longitudinal axis (9) is provided which acts on the drive connections (13, 14), wherein the spindle guide tube (8) has a first outer radius (a) along at least one axial portion. It is proposed that the spindle guide tube (8) has, on its side facing the first drive connection (13), a tube end portion (17) with a tube end edge (18), that the tube end portion (17) is widened radially over at least part of its circumference in such a way that the tube end edge (18) has an outer end edge radius (e) which is greater than the first outer radius (a), and that the widened tube end portion (17) secures the drive spring (15) against a movement along the drive longitudinal axis (9).