POSITIONING SYSTEM WITH INCREMENTAL DISPLACEMENT BY CONTROLLING TWO SYSTEMS FOR POSITION SECURING/RELEASING, WITH PIEZOELECTRIC ACTUATORS AND PARALLELOGRAM MECHANISM

摘要

The invention relates to a positioning system with incremental displacement by controlling two systems for position securing/releasing with two piezoelectric actuators and a parallelogram mechanism, to be used particularly in applications requiring long-distances displacements, high positioning precision and step-by-step motion. According to the invention, the system comprises two systems for position securing/releasing, each of them having a piezoelectric actuator (4' , 4''), a parallelogram mechanism (3, 3') and a pretensioned locking spring (5'', 5"'), and being mounted on a slide (2, 2'), between the two slides which can slide on a rolling track (1), there being another piezoelectric actuator (4) and two other pretensioned springs (5, 5') where the locking of the slides (2, 2') on the rolling track (1) is carried out by the action of the locking springs (5, 5') with piezoelectric actuators, unsupplied with voltage and the unlocking is carried out by supplying the piezoelectric actuators (4', 4") and the amplification of the deformation given by these actuators by means of the parallelogram mechanisms (3, 3').