LT4161B - A cutting apparatus of a harvester - Google Patents

Abstract

This invention belongs to the agriculture machinery manufacturing domain and may be used for hay cutting on grassland and embankments, as well as roadside grass. The cutting device consists of lower (1) and upper (2) bodies, discs (3, 4, 5) and blades (6). The bodies (1) and (2) are equipped with sprocket-belt drive. The shaft (7) is connected to a pulley (8) and a sprocket (9). The sprocket (10) shaft (11) is connected to a disc (3) and a pulley (12). Disc (4) is connected by shaft (13) to pulley (14). Pulleys (8, 14) are connected to trapezoid cross-section transmission belts (15). Disc (5) is connected by a shaft (16) to a pulley (17). Transmission belts join pulleys (12) and (17).

Description

The invention relates to the field of agricultural machinery manufacturing and has been used quite recently for mowing of pastures, meadows, ditches and embankment slopes and roads.

Known rotary cutters that cut vegetation with a knife that moves at high speed in a linear fashion. The knife (or several knives) is fixed to the rotating disc (rotor). The disc is rotated with gear, belt or chain drive. Multi-blade cutters are used to increase the cutter width and reduce weight. One of their working conditions is that the direction of rotation of the discs should be such that the cut vegetation of one disc is not thrown into the cutting area of another disc, but is removed. This is achieved when adjacent discs rotate in opposite directions. The simplest technical solution to implement this condition is a gear drive between adjacent discs, which is implemented in the KRN-2,1A cutting machine (Kosilka rotational navy KRN-2,1A, techniceskoe opisanije i post-operation, Moskva, 1988).

But gear requires high production accuracy, rigidity of the housing and good lubrication. As a result, the cutting machine is difficult to manufacture, heavy and expensive, and difficult to operate.

Known belt mower construction (German Patent No. 1582227, Kl.AOld, 1973). This design has an upper body, which limits its use as it is only suitable for low grass (eg cultivated meadows, pastures), as tall grass or shrubs that frequently occur, eg on ditch slopes, will become obstructed behind the frame or other of elements positioned above the cutting area.

Also known is a belt mower variant (USSR Patent No. 1829887, cl. A01D34 / 66, 1993, (prototype).

The special profile belt wraps the rotors on the sides and rotates the rotors, with their axes at an angle of about 5 ° with the vertical, to pass through the opposing rotating blades. But this design has its drawbacks - when the mower is operating in poor conditions, the blades are deformed, leaving a small gap created by the 5 ° rotation of the rotor axis and the blades of adjacent rotors chopping each other.

In addition, the belt wraps the pulleys at a slight angle (45-60 °), which causes the belt to slip, reduce rotor speed and cause the blades to stop cutting grass when higher loads are applied.

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In addition, the design requires a special profile to handle difficult tensile-crushing conditions, which degrades the performance of the mower.

The object of the invention is to improve the performance of the cutting device. This is achieved by positioning the rotors so that their axes are not in one line and by installing a complex belt-gear in two (lower and upper) housings. The actuator allows the center disc to rotate in the opposite direction to the edge discs. This is accomplished by the fact that the side discs are connected by a belt drive and the middle is connected to one of the side discs via a pair of gears which change the direction of rotation and the belts that transfer the movement to the disc shaft.

The multi-disc mower works windrows where the rotating discs emit the cut grass. Thus, in the cavity between adjacent discs, in which the direction of movement of the blades coincides with the direction of movement of the unit, the grass is not sprayed through the mowing machine, which allows an additional transmission above the discs to be installed here.

FIG. a side view of the cutter;

FIG. - top view.

The cutting unit consists of lower casing 1, upper casing 2, discs 3, 4, 5 with blades 6. Casings 1 and 2 are equipped with a mixed gear-belt drive. The shaft 7 is connected to the pulley 8 and the pulley 9. The shaft 11 of the pulley 10 is connected to the disk 3 and the pulley 12. The disk 4 is connected to the pulley 13 by the pulley 14. The pulley 8 and 14 are connected by transmission belts 15. 12 and 17 are connected by transmission belts 18.

The machine works as follows.

After connecting the power unit to the shaft 7 (tractor PTO shaft, hydraulic motor, etc.), the transmission belts 15 transfer the rotation to the pulley 14 and through the shaft 13 to the disc 4. The same shaft movement is transmitted to the pulley 12 via the spindle pair 9 and 10. the belts 18 and the pivoting disc 5 via the pulley 17. The transmission belts 15 and 18 are of trapezoidal cross-section.

The direction of rotation of the discs is indicated by the arrows in FIG. The blades 6 cut the vegetation of the discs 3, 4, 5 in the direction of their rotation and are thrown in zones A and B by two swaths without entering the area between the discs 3 and 4, where the upper housing 2 is provided with a transmission.

Definition of the Invention

Claims (1)

Definition of the Invention The mower-type rotary blade rotor is characterized by a two-body system, upper and lower, with a gear-belt drive with a trapezoidal profile belt.