Boring head with a mechanism for clamping a displaceable tool carrier

A boring head comprising

• a tool body having a main rotation axis about which the tool body rotates during boring operations;
• a tool carrier arranged in or on the tool body;
• a first motor for displacing the tool carrier relative to the tool body along a displacement direction, the first motor being an electric motor with a stator and a rotor, wherein a main drive axis is defined by the rotation of the rotor during operation of the first motor, which main drive axis extends in parallel to the displacement direction;
• and
• a clamping mechanism with a clamping element for effecting a clamping force on the tool carrier, in order to prevent a displacement of the tool carrier relative to the tool body during boring operations,
• wherein the clamping mechanism is an active clamping mechanism which effects a clamping force that can be adjusted actively in such a way that an energy flow takes place from an energy source to the clamping mechanism, when the clamping mechanism is activated and/or is in its activated state,
• wherein the clamping mechanism is based on the piezoelectric effect and comprises at least one piezo element, and
• wherein the clamping element is adapted to be moved away from the tool carrier by means of an expansion of the piezo element as a result of an electric voltage acting on the piezo element.