Patent ID: 10208766

Abstract:
Pre-assembled blade (20) for fans (10) for cooling the coolant contained inside the radiator (1) of operating machines and/or vehicles, comprising a blade body (20a) rigidly connected to an axial shank (21), a part of which situated radially on the outside of the blade body is in the form of a cylindrical pin (21b); wherein the shank (21) has a part axially on the outside of the blade body in the form of a cylindrical pin (21b), holes (21c) with internal female threading being formed inside the pin (21b); and in that the blade (20) comprises —a blade flange (22) comprising. a hollow cylindrical body (22a), the opposite end bases of which comprise respectively: a flat edge (22b) provided with through-holes (22c). an inset annular seat (22d); a disk (23) provided with through-holes (23a) and an eccentric recess (23d) for stably containing with friction a pin (24) which is also eccentric, for rotationally actuating the blade about its axis; —screws (25) designed to pass through the through-holes (23a) in the disk (23) and mate with the female thread of the holes (21c) in the pin (21b) in order to fix relative to each other the disk (23), flange (22) and pin (21b), thus ensuring a definite angular alignment of the blade relative to the pin (24) during pre-assembly.