Patent ID: 8793848

Claim:
A device for needling a fibrous web, the device comprising: an oscillating driven needle bar, which has on its underside a needle board with a plurality of needles; a movable bar carrier for holding the needle bar; a crankshaft assembly for the oscillating motion of the bar carrier, which has at least two connecting rods connected to the bar carrier and two driven eccentric shafts or two driven crankshafts, with a phase-adjustment means for adjusting a phase angle at one of the two eccentric shafts or at one of the two crankshafts; and a guide means acting on the bar carrier for guiding the needle bar during needle bar oscillating motion, the guide means comprising one or more guide rods, which are connected to the bar carrier by means of one or more swivel joints, wherein the driven needle bar is guided by the guide rod or guide rods at the phase angle adjusted by the phase-adjustment means in the angle range of 0° to 30°, wherein the phase-adjustment means comprises an adjusting gear and an adjusting actuator or an adjusting mechanism interacting with the adjusting gear, wherein the adjusting gear is coupled with one of the eccentric shafts or crankshafts, wherein the adjusting gear is formed by a displaceable actuating shaft and a gear pair with a gear having teeth that are not parallel to the axis of rotation, wherein an adjustment path adjusted by the adjusting actuator or by the adjusting mechanism at the actuating shaft is converted by the gear pair into an adjusting angle.