Linear electro-mechanical actuator, preferably for water cutting

A linear actuator for water cutting, comprising a motor operatively associated with a lead nut so to cause a rotation of the lead nut about a direction of translation of the lead nut,

• a translation unit comprising a screw coupled to the lead nut and at least one rod constrained to the screw by a constraining system, the actuator comprising an anti-rotation system designed to exert an anti-rotation torque on the translation unit so that the rotation of the lead nut causes a translation of the translation unit along the direction of translation,
• wherein the constraining system comprises elastic means by means of which the constraining system is at least partly elastic at least in a direction which is transversal to the direction of translation, so as to at least partly absorb the radial loads acting parallel to the transversal direction during the rotation of the lead nut on the translation unit,
• wherein the elastic means comprise a plurality of springs which are angularly distributed around the direction of translation, each of which is designed to act in a direction parallel to the direction of translation and is operatively interposed between the screw and the rod, at least two springs of the plurality being located on opposite sides from each other relative to a plane containing the direction of translation, wherein the two springs are configured to allow moving in opposite directions from each other parallel to the direction of translation and/or to an axis of extension.