Needling apparatus with means to adjust the phase angle between two eccentric drives

摘要

An apparatus for needling a non-woven material with a support (1) for at least one needleboard (3) comprises: at least two eccentric drives (7, 8) which are drivably connected with the support (1) via connecting rods (9, 10); and a device for adjusting the mutual angular position of the two eccentric drives (7, 8) which consists of a superposition gear (17) in a gear train (11) for the drive connection of the two eccentric drives (7, 8). The superposition gear is formed by a planatary gear system which includes an intermediate wheel (19) which is held on a fixed link 21 and which can be displaced via the fixed link 21 by an additional drive member 22. Displacement of the intermediate wheel (19) allows the phase angle ( d ) to be changed.