Movement unit for a machine tool and machine tool with such a movement unit

A movement unit for a machine tool, comprising:

• a supporting structure movable in a first direction for supporting a functional unit of the machine tool;
• two longitudinal guides extending in the first direction and arranged offset relative to one another in a second direction that is transverse to the first direction;
• a guide unit mounted on each longitudinal guide, each guide unit being movable relative to the longitudinal guides in the first direction and not movable relative to the longitudinal guides in the second direction;
• and
• a bearing structure which connects the supporting structure to one of the guide units such that the supporting structure is not movable relative to the guide unit in the first direction and is movable relative to the guide unit in the second direction, the bearing structure comprising:
• a bearing receptacle associated with one of the supporting structure and the guide unit, the bearing receptacle having a receptacle wall extending in the second direction, and
• a bearing projection associated with the other one of the supporting structure and the guide unit which engages the bearing receptacle, wherein the bearing projection and the receptacle wall are preloaded towards one another in the first direction, the bearing projection and the receptacle wall thus being supported against one another to prevent motion of the bearing projection and the receptacle wall relative to one another in the first direction, and wherein the bearing projection and the receptacle wall are movable relative to one another in the second direction.