Patent ID: 6561056
Filing Date: 2003-05-13
Classification: F15B,F16C,Y10T

Abstract:
A linear handling unit comprising:fixed body; a movable body; bearings, sad movable body being driven and movable on said fixed body with the interposition of sad bearings; a fluid-type linear actuator for controlling the movements of said movable body on said fixed body; an interface plate at one end of said movable body, one of said fixed body and said movables body being a first body carrying said bearings as opposing linear bearings in a front and carrying said fluid-type linear actuator, the other one of said fixed body and said movable body being a second body longitudinally carrying two lateral studs for guiding and for coupling with said linear bearings for the movement of one said body on the other, said linear actuator being connected to said second body, said studs being arranged in two parallel flexible-expandable flanges which are integral with said second body carrying said studs; an adjusting screw; and an adjusting bar arranged between said flexible-expandable flanges, said adjusting bar being engaged by said adjusting screw to vary an expansion of said flanges and to regulate the clearance between both said guiding studs and respective said bearings; said first body has a U-shaped section with a base, in which is provided at least one chamber for said fluid-type linear actuator, and with two lateral walls that are at right angles to said base and delimit between them a channel, sad second body being arranged and sliding with the interposition of said linear bearings, said linear bearings being ball-recirculation bearings arranged in pairs in seats provided on an internal side of each of lateral walls of said first body; each of said ball-recirculation-type linear bearings comprise: a shell body formed by two shells, each shell being complementary, opposite and closed one on the other; a series of balls arranged to circulate in an endless track delimited by said shells when closed; and two pins on opposite parts of said balls in a plane at right angles to a plane in which said balls lie, a branch of said endless track being open towards the outside through a slot so that sad balls, which pass through said branch, protrude to an outside of said shell body by said slot, said pins testing both on said balls that pass through said branch of said track that is open towards the outside and protruding from the shell body each through and oblong opening.