A header for harvesting agricultural crops includes a cutter bar assembly coupled to a header frame, the cutter bar assembly flexible upwardly and downwardly relative to the header frame between opposite ends thereof for contouring to the field. The cutter bar assembly includes a guard bar extending across a front portion of the header frame between the opposite ends thereof, the guard bar split into at least a first lateral section and a second lateral section operatively coupled at a guard bar joint. A protruding element extending from the first lateral section is received by a receiving element on the second lateral section at the guard bar joint to horizontally align the first and second lateral sections of the guard bar between the opposite ends of the header frame while allowing relative lateral movement therebetween during upward and downward flexing of the cutter bar assembly.

A working machine may include: a first blade; a second blade overlapping with the first blade in an up-down direction; and a holding unit configured to hold the first blade and the second blade overlapping each other in the up-down direction. The first blade may be configured to reciprocate in a direction perpendicular to the up-down direction with respect to the second blade. The first blade may include a first elongated hole having a longitudinal direction along the reciprocating direction. The second blade may include a second elongated hole having a longitudinal direction along the reciprocating direction. The holding unit may include: a holding part inserted in the first elongated hole of the first blade and the second elongated hole of the second blade; and an outer sleeve having a cylindrical shape and supported by the holding part such that the outer sleeve is rotatable around the holding part.

A working machine may include: a first blade; a second blade overlapping with the first blade in an up-down direction; and a holding unit configured to hold the first blade and the second blade overlapping each other in the up-down direction. The first blade may be configured to reciprocate in a direction perpendicular to the up-down direction with respect to the second blade. The first blade may include a first elongated hole having a longitudinal direction along the reciprocating direction. The second blade may include a second elongated hole having a longitudinal direction along the reciprocating direction. The holding unit may include: a holding part inserted in the first elongated hole of the first blade and the second elongated hole of the second blade; and an outer sleeve having a cylindrical shape and supported by the holding part such that the outer sleeve is rotatable around the holding part.

A reciprocating blade apparatus includes a pair of reciprocating blades stacked on one another in a thickness direction, and a transmission case including a power train configured to reciprocate the pair of reciprocating blades. The power train includes a pair of eccentric cams, and a pair of reciprocating members including fitting holes in which the eccentric cams are fitted, respectively. The pair of reciprocating members is guided to be able to move along an axis line which is parallel to a moving direction of the pair of reciprocating blades and runs through a rotation axis of the eccentric cams.

A reciprocating blade apparatus includes a pair of reciprocating blades stacked on one another in a thickness direction, and a transmission case including a power train configured to reciprocate the pair of reciprocating blades. The power train includes a pair of eccentric cams, and a pair of reciprocating members including fitting holes in which the eccentric cams are fitted, respectively. The pair of reciprocating members is guided to be able to move along an axis line which is parallel to a moving direction of the pair of reciprocating blades and runs through a rotation axis of the eccentric cams.

A reciprocating blade apparatus includes a pair of reciprocating blades stacked on one another in a thickness direction, and a transmission case including a power train configured to reciprocate the pair of reciprocating blades. The power train includes a pair of eccentric cams, and a pair of reciprocating members including fitting holes in which the eccentric cams are fitted, respectively. The pair of reciprocating members is guided to be able to move along an axis line which is parallel to a moving direction of the pair of reciprocating blades and runs through a rotation axis of the eccentric cams.

In a sickle cutting system, including a plurality of guard fingers in a row across a cutter bar with each guard finger having an upwardly facing ledger surface and a plurality of hold-down members with each hold-down member comprising at least one hold-down finger, the guard fingers and hold down fingers thus forming cooperating overlying pairs between which the blades pass in the cutting action the guard fingers having no portion elevated above the ledger surface thereof in front of the tip of the blade and the guard fingers and blades having lengths from the cutter bar arranged such that a forwardmost tip of the guard finger is forward of the tip of the blade.

In a sickle cutting system, including a plurality of guard fingers in a row across a cutter bar with each guard finger having an upwardly facing ledger surface and a plurality of hold-down members with each hold-down member comprising at least one hold-down finger, the guard fingers and hold down fingers thus forming cooperating overlying pairs between which the blades pass in the cutting action the guard fingers having no portion elevated above the ledger surface thereof in front of the tip of the blade and the guard fingers and blades having lengths from the cutter bar arranged such that a forwardmost tip of the guard finger is forward of the tip of the blade.

In a sickle cutting system, including a plurality of guard fingers in a row across a cutter bar with each guard finger having an upwardly facing ledger surface and a plurality of hold-down members with each hold-down member comprising at least one hold-down finger, the guard fingers and hold down fingers thus forming cooperating overlying pairs between which the blades pass in the cutting action the guard fingers having no portion elevated above the ledger surface thereof in front of the tip of the blade and the guard fingers and blades having lengths from the cutter bar arranged such that a forwardmost tip of the guard finger is forward of the tip of the blade.

In a sickle cutting system, including a plurality of guard fingers in a row across a cutter bar with each guard finger having an upwardly facing ledger surface and a plurality of hold-down members with each hold-down member comprising at least one hold-down finger, the guard fingers and hold down fingers thus forming cooperating overlying pairs between which the blades pass in the cutting action the guard fingers having no portion elevated above the ledger surface thereof in front of the tip of the blade and the guard fingers and blades having lengths from the cutter bar arranged such that a forwardmost tip of the guard finger is forward of the tip of the blade.