Abstract: The present invention is related to a self-propelled forage harvester (1) comprising one or more sensors (15) mounted on the spout (30) of the harvester, and configured to measure the speed of the crop flow passing through the spout. The harvester is further equipped with a feed roll control unit (8) configured to receive a signal from the sensor and further configured to stop the rotation of the feed rolls (4,5) when the speed is lower than a pre-defined threshold, indicating that a blockage has occurred in the spout. According to an embodiment, the harvester is further provided with a hatch door arranged in the bottom of the spout. The hatch door enables the removal of the blocked crops after a blockage has occurred. In this way, a blockage can be detected quickly and removal of the blockage may also be realised in a fast and efficient way.

Abstract: A crop processor for cracking kernels in a forage harvester, the crop processor including: a housing having an inlet and an outlet; and a first and a second comminuting roll mounted inside the housing, the comminuting rolls being arranged in parallel to define an opening between the rolls, the comminuting rolls being configured to rotate, during use, in opposing rotation directions to transport a flow of harvested crop, received from the inlet, through the opening towards the outlet, wherein the first comminuting roll is configured to rotate at a greater speed than the second comminuting roll; wherein the first and second comminuting rolls each include a plurality of teeth arranged on a circumferential surface of the comminuting roll, each of the plurality of teeth includes a leading edge which faces in the rotation direction of that comminuting roll.

Abstract: A crop processor for a forage harvester. The crop processor includes a housing having an inlet and an outlet. The crop processor further includes a pair of crop processor rolls mounted inside the housing. The crop processor rolls are made of a metal, are arranged parallel to each other, and have a gap in between. The crop processor is configured to, during use, transport a flow of harvested crop, received from the inlet, through the gap towards the outlet. Each of the crop processor rolls comprises a plurality of teeth arranged along a circumference of the crop processor rolls. The plurality of teeth have a height in radial direction and a length extending in an axial direction of the crop processor rolls. The plurality of teeth of the crop processor rolls are manufactured to comprise a substantially flat top surface of a predetermined width (W).