CONTROL DEVICE FOR CONTROLLING THE MOVEMENT OF THE NEEDLES OF A NEEDLELOOM NOTABLY OF AN ELLIPTICAL NEEDLELOOM AND NEEDLELOOM COMPRISING SUCH A DEVICE

摘要

A device for controlling a moving component along the trajectory of needles of a needling machine for joining a fiber bale or sheet, in particular a nonwoven fabric, by needling, comprising: The device comprises a drive rod 27 and an eccentric shaft 21 suitable for coupling to a needle and/or a needle board and/or an element bound to the board or needles to apply a reciprocating motion to them along one direction; It comprises a connecting rod 22 , the eccentric shaft driving the connecting rod rotationally along an axis of rotation, in particular a rotation axis extending at right angles to said direction and perpendicular to said direction, the connecting rod 22 having a pivot axis 24 , in particular an eccentric It is connected to the rod 27 via an element 23 forming an intermediate lever which pivots about a pivot axis parallel to the axis of rotation of the shaft, the lever on the one hand being connected to the connecting rod, in particular a pivot axis along an axis parallel to the pivot axis. and articulated, on the other hand, to the drive rod, in particular at a point spaced apart from the pivot axis, to apply a reciprocating motion along said direction to the drive rod.