EXOSCHELLER ATTORNEY

摘要

The present invention relates to an actuation device (1) comprising a threaded shaft (2) connected at one end to driving means adapted to allow the threaded shaft (2) to rotate about its longitudinal axis (α). The device further comprises a movable element (3) provided with a cylindrical cavity (30) adapted to receive the threaded shaft (2), and configured in such a way that a rotation of the threaded shaft (2) corresponds to a translation the movable element (3) along the longitudinal axis (α). The device (1) further comprises two guiding rods (4,4′) coupled to the movable element (3) and adapted to constrain the translation of the latter along a direction parallel to the longitudinal axis (α). The movable element (3) comprises a first (31) and a second (32) element constrained to each other, wherein the first element (31) is coupled to the threaded shaft (2) and the second element (32) is coupled to the two guiding rods (4,4′). A portion (320) protrudes from the second element (32) adapted to fit into a seat (312) formed in the first element (31), and wherein the portion (320) and the seat (312) are shaped in such a way that the contact between the seat (312) and the portion (320) takes place in a contact zone that extends along a section of the portion (320) whose midpoint lies in a plane that comprises the longitudinal axis (α) and is parallel to the plane which comprises the development axes (β,β′) of the two guiding rods (4,4′).