Axle regulator, in particular rear axle regulator for a motor vehicle

The regulator (7) has a torsion spring system (8) i.e. pre-loaded spring, that is connected with an axle guide. The spring system is supported at a motor vehicle over a controllable adjusting drive (13). The spring system has a torsion spring tube (11) and a torsion spring rod (10), where the adjusting drive has an electric drive with a Cyclo-transmission (19). An output shaft (23) of the transmission is connected with the spring system for rotary adjustment of the spring system. The spring rod is made from solid material, where the tube and the rod are nested to one another.