Electric machine for a traction drive, comprising - a stator with an inner region, in which a stator magnetic field can be generated; - a first rotor with a first armature and a first rotor shaft, wherein the first armature is arranged in the inner region; - a second rotor with a second armature and a second rotor shaft, wherein the second armature is displaceable along the second rotor shaft and perpendicularly to the stator magnetic field into the inner region and/or out of the inner region; - an electromagnet, which is arranged outside the inner region and by which an auxiliary magnetic field can be generated, by means of which the second armature can be displaced along the second rotor shaft and perpendicularly to the stator magnetic field into the inner region, whereby a torque acting on the second rotor can be varied, wherein the auxiliary magnetic field is effective along an axis of rotation of the second rotor shaft and with the auxiliary magnetic field a force component which is directed perpendicularly into the stator magnetic field can be initiated to act on the second rotor shaft; and - a spring device, which is arranged on the second rotor shaft, wherein a restoring force, acting along the second rotor shaft and out of the inner region, can be generated by means of the spring device to act on the second rotor, wherein the restoring force R predominates when the auxiliary magnetic field is reduced below a minimum size, wherein the spring device comprises a spring with a circular cross section and is arranged around the second rotor shaft, along the extent thereof in the direction of the axis of rotation. - a stator with an inner region, in which a stator magnetic field can be generated; - a first rotor with a first armature and a first rotor shaft, wherein the first armature is arranged in the inner region; - a second rotor with a second armature and a second rotor shaft, wherein the second armature is displaceable along the second rotor shaft and perpendicularly to the stator magnetic field into the inner region and/or out of the inner region; - an electromagnet, which is arranged outside the inner region and by which an auxiliary magnetic field can be generated, by means of which the second armature can be displaced along the second rotor shaft and perpendicularly to the stator magnetic field into the inner region, whereby a torque acting on the second rotor can be varied, wherein the auxiliary magnetic field is effective along an axis of rotation of the second rotor shaft and with the auxiliary magnetic field a force component which is directed perpendicularly into the stator magnetic field can be initiated to act on the second rotor shaft; and - a spring device, which is arranged on the second rotor shaft, wherein a restoring force, acting along the second rotor shaft and out of the inner region, can be generated by means of the spring device to act on the second rotor, wherein the restoring force R predominates when the auxiliary magnetic field is reduced below a minimum size, wherein the spring device comprises a spring with a circular cross section and is arranged around the second rotor shaft, along the extent thereof in the direction of the axis of rotation.