Electric machine, method for operating said machine, and motor vehicle

An electric machine, comprising:

• a housing;
• a rotor which comprises a rotor shaft and a rotor laminated core;
• a stator which comprises a stator laminated core, wherein the stator laminated core comprises grooves in which stator windings are received, wherein a respective tooth of a plurality of teeth of the stator laminated core is arranged between two respective grooves that are arranged adjacent to one another in a circumferential direction of the stator laminated core;
• an annular gap configured between the rotor laminated core and the stator laminated core;
• a tooth head ring arranged in the annular gap, a respective recess of the tooth head ring being arranged between two tooth heads of the tooth head ring that are arranged adjacent to one another in a circumferential direction of the tooth head ring;
• and
• at least one resetting element, which is configured to push the stator laminated core or the tooth head ring into a first relative position or into a second relative position by a resetting force of a respective resetting element of the at least one resetting element,
• wherein via a relative movement between the stator laminated core and the tooth head ring, a relative position of the stator laminated core and the tooth head ring is adjustable such that, in the first relative position of the stator laminated core and the tooth head ring, the tooth heads of the tooth head ring radially inwardly abut the teeth of the stator laminated core, and, in the second relative position of the stator laminated core and the tooth head ring, the tooth heads radially inwardly abut the grooves of the stator laminated core, and
• wherein the stator laminated core or the tooth head ring is transitionable into the second relative position or into the first relative position contrary to the resetting force of the respective resetting element.