A cutting assembly comprising a drive arm assembly and knife head assembly for a header of a plant-cutting machine is disclosed. The drive arm assembly generally includes a drive unit connected to a pivotable drive member and a bearing element with a rounded head. The knife head assembly generally includes a mounting bar and a clamping portion that collectively form a cavity for receiving the bearing element and forming a pivot joint. The knife head assembly is attached to a cutter bar such that the operation of the drive unit causes the cutter bar to have substantially linear motion by way of the pivot joint.

An improved knife drive assembly for use with a header of an agricultural harvester is provided. The knife drive assembly includes a housing, a rotatable driver having at least one curved channel or sloped lateral side, at least one wobble arm engaging the curved channel and a at least one mounting bar that engages the wobble arm and a cutter bar such that when the rotatable driver is rotated, the cutter bar engages in substantially linear oscillating motion.

An improved knife drive assembly for use with a header of an agricultural harvester is provided. The knife drive assembly includes a housing, a rotatable driver having at least one curved channel or sloped lateral side, at least one wobble arm engaging the curved channel and a at least one mounting bar that engages the wobble arm and a cutter bar such that when the rotatable driver is rotated, the cutter bar engages in substantially linear oscillating motion.

An agricultural vehicle includes a chassis and a header carried by the chassis. The header includes: at least three knife assemblies; and at least three knife drives, each of the knife drives being drivingly coupled to at least one of the at least three knife assemblies.

An agricultural vehicle includes a chassis and a header carried by the chassis. The header includes: at least three knife assemblies; and at least three knife drives, each of the knife drives being drivingly coupled to at least one of the at least three knife assemblies.

A Knife attachment arrangement for oscillatingly driven mower knives, including a shaft (1) defining a first longitudinal axis (X) and having a receiving space (4) and a mower knife drive pin (2) engaging in the receiving space (4) and being detachably connected to the shaft (1). A head bearing holding area (13) of the mower knife drive pin (2) engages in the receiving space (4) and has a first contact face (14) that is in contact with the first support face (6) and is curved opposite to the first support face (6). An undercut (8) is formed in the wall (5) delimiting the receiving space (4) and the head bearing holding area (13) of the mower knife drive pin (2) has a collar (16) engaging in the undercut (8), wherein the undercut is formed as a groove (8) in the wall (5), the groove (8) extends radially with respect to the second longitudinal axis (Y).

A drive arrangement for the reciprocating drive of a cutter bar comprises an input element which can be set into a continuous pivoting movement by a drive device, and an output element which is coupled to the cutter bar and is coupled to the input element by a coupling rod. The output element is pivotably connected to a first end of a first lever and of a second lever, which levers, for their part, are pivotably mounted. The levers and the output element are dimensioned in such a manner that the output element essentially only carries out a lateral movement.

A cutter guard assembly for a knife drive of an agricultural farm implement is provided. The cutter guard assembly includes a cutter bar assembly, a floor assembly and a knife assembly. The cutter bar assembly has a cutter bar. The floor assembly includes a floor extending from the cutter bar and a cover extending from the floor. The knife assembly is covered by and situated below the floor assembly. In operation the cover drapes over a rigid frame of a header shielding the knife assembly from debris.

A cutter guard assembly for a knife drive of an agricultural farm implement is provided. The cutter guard assembly includes a cutter bar assembly, a floor assembly and a knife assembly. The cutter bar assembly has a cutter bar. The floor assembly includes a floor extending from the cutter bar and a cover extending from the floor. The knife assembly is covered by and situated below the floor assembly. In operation the cover drapes over a rigid frame of a header shielding the knife assembly from debris.

An angular gear arrangement for mower knife driven in an oscillating manner, including a transmission housing, an input shaft, which engages in the interior of the transmission housing, a rotor, which is mounted in the transmission housing to be rotatable about a first axis of rotation by a first bearing, a crankshaft, which engages in the receiving space of the rotor through the receiving opening and is mounted in the receiving space, to be rotatable about a second axis of rotation by a second bearing, a driving element, which is non-rotationally connected to the rotor and mounted so as to be rotatable about the first axis of rotation by at least one third bearing, and support means, which are arranged in the transmission housing and on which the third bearing is axially supported, the support means being releasably fastened to the transmission housing.