EA008177B1 - Reaper's cutters - Google Patents

Abstract

The invention relates to agricultural machinery, in particular to reaper's cutters. The invention is aimed at increasing the quality cutting of mowing and reducing of harvesting losses which is achieved, according to the invention, by using in the reaper's cutter a shaft with a crank mounted thereon having a hole for connecting with a rod, a knife with segments and a finger bar with fingers fixed thereon, the crank has an additional hole for selective rod connection, the crank length is chosen from provisions:1. R= S,in coinciding symmetry axes of pins and segments:2. R= S + 0,5 (S + B+ B);3. R= S + 0,5 (B+ B);at offsetting axes symmetry of fingers and segments to the value 0,5 (B+ B), wherein: S is an axle base between fingers; Bis pin width; Bis width of the segment front edge.

Description

The invention relates to agricultural machinery, namely to cutting apparatus of the reapers.

Known reapers with a cutting apparatus containing a crank drive of the knife, a knife with segments, a finger beam with fingers fixed on it. In these cutting devices, the axes of symmetry of the fingers and the knife segments in the non-working position coincide, and the knife travel is equal to the center distance between two adjacent fingers (A. Kirienko. Mechanic's Handbook. - M .: Kolos, 1975).

The disadvantage of these cutting units is that when the header is working, part of the stems remains uncut and losses during harvesting increase.

The closest to the proposed invention is the cutterbar of the reaper, containing a shaft with a crank mounted on it with a hole for connecting with a connecting rod, a knife with segments and a finger beam with fingers fixed to it (Barefoot ES Cutting apparatuses of harvesting machines. M .: Mashinostroenie , 1967, p. 91).

In this device, the part of the cutting edge of the segment that is inside the finger does not work for a cut, and uncut mowing stalks remain, which leads to yield losses.

The objective of the invention is to develop a cutting apparatus of the reaper, allowing you to increase the purity of the cut mowed mass during harvest and reduce losses during harvest.

For this purpose, in the cutting apparatus of the header, containing a shaft with a crank mounted on it with a hole for connecting with a connecting rod, a knife with segments and a finger bar with fingers fixed to it, according to the invention, the crank has additional holes for selective connecting the connecting rod, and the length of the cranks is chosen from the conditions :

1. B2 = 8, with the coincidence of the symmetry axes of the fingers and segments;

2. Bs = 0.5 (8 + B ₁ + B ₂ );

3. B ₄ = 8 + O, 5 (B ₁ + B ₂ );

when the axes of symmetry of the fingers and segments are shifted by the value O.5 (B | + B ₂ ).

where 8 is the center distance between the fingers;

B1 - finger width;

B2 is the width of the leading edge of the segment.

The invention is illustrated by drawings, where in FIG. 1 shows a general view of the cutting unit; in fig. 2 - the same, top view; in fig. 3 - a fragment of the cutting apparatus, where the symmetry axes of the fingers and the segments coincide; in fig. 4 - the same, with the shift of the axes of symmetry of the fingers and segments; in fig. 5 - crank, side view, section; in fig. 6 - crank, top view.

The cutterbar of the header contains a shaft 6 with a crank 3 mounted on it with a hole 7 for connecting to a connecting rod 5, a knife with segments 2 and a finger beam with fingers fixed to it 1. The crank 3 has additional holes 8 for selectively connecting the connecting rod 5, and the length of the cranks choose from the conditions:

1. Κ ₂ = 8, with the coincidence of the symmetry axes of the fingers and segments;

2. B _s = 0.5 (8 + B1 + B ₂ );

3. K ₄ = 8 + O, 5 (B ₁ + B ₂ );

when the axes of symmetry of the fingers and segments are shifted by the value of 0.5 (B1 + B ₂ ), where 8 is the center distance between the fingers;

B1 - finger width;

B2 is the width of the leading edge of the segment.

With the coincidence of the axes of symmetry of the fingers 1 and segments 2, the knife is mounted with the possibility of displacing the segments 2 by a stroke length of 28. This variant of the invention corresponds to a crank length Κ ₂ equal to the center distance 8 between the fingers (Fig. 6).

By moving the axes of symmetry of the finger segments 1 and 2 by the amount 0.5SCH + VD crank length K is ₃ O 5 (8 + B, + B ₂₎ or K ₄ is 8 + 0.5SCH + VE (FIG. 6).

The crank length Κι corresponds to the prototype.

The rod 5 is installed in the hole 8 of the crank on the axis 4.

The device works as follows.

When you turn on the drive (not shown) of the cutting unit, the knife makes a reciprocating movement and performs cutting of the stalks of the agricultural crop in segments 2.

When the length of the crank Κ ₂ = 8 improves the purity of the slice due to the fact that the stems between two adjacent fingers, will be cut by the passage of two segments 2 through one finger 1, this increases the speed of the knife when passing through the finger.

With a crank length Κ ₃ equal to O, 5 (8 + B! + B ₂ ), the cut purity is improved compared with the prototype due to the fact that the entire edge of the segment 2 starts working on the cut and the knife speed increases during passage through the finger.

With a crank length of K ₄ equal to 8 + O.5 (B _| + B2). the purity of the cut is improved due to the fact that the stems

- 1 008177 located between two adjacent fingers, are cut off by the passage of two segments 2 through one finger and the speed of the knife increases as it passes through the finger.

Claims (3)

The header cutting apparatus, comprising a shaft with a crank mounted on it with an opening for connecting to the connecting rod, a knife with segments and a finger bar with fingers attached to it, characterized in that the crank has additional holes for selective connecting of the connecting rod, and the length of the cranks is selected from the conditions: 1. Κ ₂ = δ, with the coincidence of the axis of symmetry of the fingers and segments; 2. C3 = 0.5 (8 + B1 + B2); 3. K4 = 8 + O, 5 (B1 + B2), with a shift of the axis of symmetry of the fingers and segments by a value of 0.5 (B ₁ + B ₂ ), where 8 is the center distance between the fingers; B1 - finger width; In ₂ - the width of the leading edge of the segment.