Chopping drum (10) for a field chopper, having a drum body (11), having a blade carrier (12) and having a plurality of blades (13) which are fastened to the blade carrier (12), each blade (13) being fastened to the blade carrier (12) via at least two fastening means (14) which extend through a fastening section (15) of the respective blade (13) into the blade carrier (12), and the fastening means (14) penetrating the fastening section (15) of the respective blade (13) at an angle of between 40° and 70°.

A self-propelled forage harvester is disclosed that includes a blade sharpening and shear bar adjusting device, a monitoring device configured to cyclically generate information on the state of the cutterhead chopping glades and the distance of the shear bar to the cutting edge, and a control unit. The control unit evaluates the information provided by the monitoring device about the state of wear of the chopping blades and the distance, compares it with a limit value for the state of wear and/or the distance, where the limit value forms a lower limit for an optimum range to be maintained by the blade sharpening and shear bar adjusting device, of the instantaneous cutting sharpness of the chopping blades or of the distance and, when the limit value is reached, automatically triggers a sharpening process and/or of a shear bar adjustment by the blade sharpening and shear bar adjusting device.

A detection arrangement for detecting a wear status of a chopping knife arrangement of a chopping device provided for processing a product flow, wherein the chopping device has a revolving chopping drum receiving the chopping knife arrangement and at least one shear bar which cooperates with the chopping knives, with a sensor arrangement which has a magnetic exciter arrangement and a flux conducting device magnetically coupled thereto. The sensor arrangement provides a pole arrangement which forms at least one magnetic pole with a pole surface for conducting magnetic flux, wherein at least a portion of the chopping knife passes the pole arrangement during a rotation of the chopping drum. A voltage induced when a chopping knife arrangement passes the sensor arrangement forms the measured magnetic value, which is used by the evaluation unit to determine the state of wear of the chopping knife arrangement.

A controller for controlling a chopper arrangement of an agricultural harvester. The controller receives sensor data indicative of an intensity of chopping performed on crop material by the chopper arrangement, and sensor data indicative of a power consumption of the chopper arrangement. The controller has a processor to determine an actuator setting for a chopper arrangement actuator of the agricultural harvester in dependence on the received sensor data indicative of the intensity of chopping and the received sensor data indicative of the power consumption. The controller sends an actuator control signal to the chopper arrangement actuator to control the chopper arrangement actuator to operate in accordance with the associated determined actuator setting. The determined actuator setting includes an amount of insertion, and an angle of insertion, of at least one bank of counter knives of the chopper arrangement relative to rotatable knife rows of the chopper arrangement.

Example aspects of a wrap cutting assembly for a bale wrap and a method for using a bale wrap cutting and retaining apparatus are disclosed. The wrap cutting assembly can comprise a saw housing defining a connection portion; a saw comprising a plurality of teeth configured to cut the bale wrap; and a linkage system movably coupling the saw to the saw housing and configured to move the saw along an arcuate path.

A chopping unit (10) of a forage harvester, having a chopping drum (11) bearing chopping blades (15), having a shear bar carrier (17) bearing a shear bar (16) for the chopping blades (15), wherein a top side (20), facing away from the shear bar carrier (17), of the shear bar (16) provides a cutting edge (21) of the shear bar (16), wherein the top side (20) of the shear bar (16) is contoured such that the top side (20) of the shear bar (16) is inclined, at least in a top-side portion (26) facing the chopping drum (11), continuously in the direction of the chopping drum (11) in the contact region with the chopping blades, as seen in the axial direction of the chopping drum (11).

A cutting unit includes: a plurality of knives; a knife guard with at least one opening; a knife tray carrying the knives and movable between an exposed position where the knives extend through the at least one opening and a retracted position where the knives are shielded by the knife guard; and an overload protection assembly including a first slide member coupled to the knife tray and having a first engagement surface and a second slide member having a second engagement surface that is engaged with the first engagement surface. The first slide member and the second slide member are held together and slidable relative to one another such that the first slide member slides relative to the second slide member to move the knife tray from the exposed position to the retracted position when an overload force is applied to at least one of the knives.

Chopping blade (10), having a basic body (11), which has a fastening portion (12) for fastening said chopping blade to a chopping drum and a cutting portion (13) which is angled in relation to the fastening portion, and having a crop-guiding element (15) which is fastened to the fastening portion (12) and is intended for guiding chopped harvested crop, wherein a guide surface (16) of the crop-guiding element (15) has a curved contour. A distance (a) between the beginning of the guide surface (16) of the crop-guiding element (15) and a transition edge (14) between the fastening portion (12) and the cutting portion (13) of the basic body (11) is between 4 mm and 8 mm. The guide surface (16) runs rectilinearly in a first portion (18) with a length (b) between 4 mm and 8 mm, wherein said first portion (18) encloses an angle (α) between 18° and 22° with the fastening portion (12). The first portion (18) merges into a concavely curved second portion (19), the radius of curvature (Rx) of which is between 21 mm and 25 mm and which has a wrap angle (β) between 29° and 33°. The second portion merges into a concavely curved third portion (20), the radius of curvature (Ry) of which is between 18 mm and 22 mm and which has a wrap angle (γ) between 24° and 28°. The third portion merges into a convexly curved fourth portion (21). A maximum height of the crop-guiding element is between 24 mm and 30 mm.

An agricultural baler includes: a frame; a feeder system coupled with the frame and including: a cutting assembly coupled with the frame and including: at least one knife configured for cutting a crop material; an overload protection mechanism associated with a single one of the at least one knife and including a pivot device including an engagement device including an offset configuration; and a displacement apparatus configured for selectively forcing the at least one knife to occupy a first position and for selectively forcing the at least one knife to occupy a second position, each by way of the engagement device.

A chopper for an agricultural harvester comprises a housing, a rotor, a bank of counter-knives, and an adjuster. The housing comprises a variable geometry outlet floor. The is positioned in an interior region of the housing for rotation therein relative to the housing. The bank of counter-knives is movable relative to the rotor between a first aggressiveness position and a second aggressiveness position to adjust chopping aggressiveness of the chopper. The outlet floor comprises a ramp movable relative to the rotor between a first ramp position and a second ramp position. The adjuster positions the ramp in the first ramp position when the bank of counter-knives is positioned in the first aggressiveness position and positions the ramp in the second ramp position when the bank of counter-knives is positioned in the second aggressiveness position.