SU1681759A1 - Section of screw cutter for harvesting coarse-fibred plants - Google Patents

Abstract

The invention relates to agricultural machinery engineering and is intended to cut heavy stalked plants (for example, maize). The purpose of the invention is improving the cleaning efficiency of the cutting apparatus from cut stalks of weeds. A section of a screw cutting apparatus is proposed, comprising a screw 1 with a knife strip 2 wound around the outer diameter, mounted in the supports 3 of the carrier frame 4, and a number of counter-pins 5 connected by a bar 6, wing 8, consisting of several blades fixed on the shaft 7 forming a conical body of rotation during rotation, tapering in the direction of the screw, and their edges are made in the form of a blade. When the weed stems of weed vegetation move along shaft 7, their front ends begin to move in a diametrical direction along the blades of the wing 8 due to centrifugal forces, and then they meet the frame bar 4, which is a contradiction, and are cut off by the cutting edges of the blades. 1 hp f-ly, 2 ill.

Description

The invention relates to agricultural machinery and is intended primarily for. a cut of coarse plants (e.g. corn).

The purpose of the invention is to increase the efficiency of cleaning the cutting apparatus from the cut stems of weed vegetation.

Figure 1 presents a structural diagram of a section of a helical cutting apparatus, a plan view; figure 2 is a section aa in figure 1.

The section of the screw cutting apparatus contains a screw 1 (Fig. 1) with a knife strip 2 wound around the outer diameter, mounted in the supports 3 of the carrier frame 4, and a number of opposing fingers 5 connected by a beam 6. On the shaft 7 of the screw 1 is fixed winged 8, consisting of several blades 9 (figure 2), forming during rotation a conical body of revolution, tapering towards the screw 1. The forming edges 10 of each blade 9 are made in the form of a blade.

The screw 1 is driven through a belt drive from a machine power take-off shaft (not shown).

Screw cutting apparatus operates as follows.

When moving forward the machine falling into the solution between the opposing fingers 5 (figure 1), the stems (for example, corn) are brought by a rotating knife strip 2 to the opposing edges of the fingers 5, pinched and cut. After that, the butt part of the plant falls on the inner surface of the knife strip 2, and then moves toward the winged and then is thrown by the blades 9 in the opposite direction of the machine.

Thin stems of weed vegetation (for example, porcupine) are also cut off during the operation of the apparatus, however, due to their flexibility, they are wound onto the shaft 7 of the screw G in the area of its operation and then move along it under the action of axial forces from the feather of the screw towards the winged 8 and enter shoulder blades 9.

When the weed stems of weed vegetation move along the axis of the winged 8, the front ends of the stems begin to move in a diametrical direction along the blades 9 due to centrifugal forces, and then meet with the beam of the frame 4, which serves as a contradiction, and are cut off by edges 10 of uneven length.

Claims (2)

Claim 1. Section of a screw cutting apparatus for harvesting rough-stemmed crops, including a screw with a knife strip wound around the outer diameter, mounted in the supports of the bearing frame, and a series of opposing fingers connected by a beam, a winged wing fixed to the screw shaft, consisting of several blades, and a screw drive characterized in that, in order to increase the efficiency of cleaning the cutting apparatus from the stems of weed vegetation, the winged blades are made triangular and with decreasing height towards the screw. 2. The section according to claim 1, with the fact that the forming edges of each blade are equipped with blades. Dd