NL8900578A - KNIFE HOLDER FOR MOWER KNIVES OF HARVESTING MACHINES. - Google Patents

Description

VO 2055 I

Knife holder for mower blades from harvesters- I

The invention relates to a knife holder for cutting

blades of harvesters. I

Such containers have long been known, I

usually a basic triangular shape and are according to the I

5 cutting width of the respective knife bar in different I

equal number on a carrying bar, also knife rail or knife back I

called, riveted or screwed. I

The holders work together with cutting fingers as a counterknife. I

Cutting systems are also known, in which the counter knives j

10 also consist of cutting blades, which are either rigid to I.

the cutting bar are attached, or in a counter-direction to I.

of a cutting blade as the second cutting blade. The I

the latter system is also known as a double blade cutter bar. I

Are the holders no longer sharp with such a cutting blade, I

15, then often a material that is difficult to cut or responds to. it in I.

the crop material is weeds between the container I.

and the mowing finger or the counter blade in the second plane

mounted, resp. working retainer pulled. The mate- I

rial gathers there and lifts the mower blade from the I.

20 counterknife and the cutting power will drop quickly I

and finally the cutting blade is blocked. I

Because the penetration of this difficult cutting material I

I cannot already be avoided between the holder and the counterknife

through cleaning openings in the I

25 holder, to achieve the removal of this material. I

From German patent specification 24 51 106, a container I

known which has a triangular recess in basic form, I.

which, however, does not reach to the base of the holder.

From German patent 71 45 48, resp. the I

German Gebrauchsmuster 17 15 760 is one such embodiment

ring known, which however reaches to the base side and therefore I.

open towards the base. I

German Offenlegungsschrift 32 29 743 furthermore describes various cleaning systems, which, apart from the above-discussed embodiments, may be possible.

8900578.

4 -2- present, by a corresponding distance between two holders, resp. by providing recesses and cleaning edges on the container flanks.

British patent 447 674 finally describes a container which has slit-shaped recesses in the flanks which also act as cleaning openings.

Because the cleaning openings up to before the spacer wings, with which the individual cutting fingers touch, resp. the holders according to the aforementioned 15 publications are German, up to before the connecting spine, which in the case of double fingers always connects two separate fingers designed as a counterknife, in order to clean up the cut material, which mainly sticks to the connecting points. patent 24 51 106, German patent 71 45 48 and British patent 447,674 very unstable. The horizontal load-bearing capacity of the holders is very small and must largely be achieved by the holder fixing nails resp. screws are collected. Due to the alternating voltages caused by the oscillating mode of operation, the holders very often release.

With the holders mounted at the correct distance on the knife rail and the cleaning edges caused thereby, the holder attachments are also heavily loaded, because the holders do not support each other. A very steep cutting angle is also created, because the holders must be considerably narrower, since the usual 7.5 cm distribution must be maintained in front of the alternating point of the reciprocating blades.

30 In the magazine "Agrartechnik", p. 479, of November 11, 1955, a Russian container construction is described, which has two recesses.

One recess extends to the base side and is therefore open to the base side; the other recess is punched out of the holder slit as a triangle. Between the recess in the base side and the recess in the holder tray in the 890057B.

-3-

The shape of a triangle thus remains a connecting spine which stabilizes the holders in a horizontal direction. I

In the vertical direction, however, this knife holder is I.

greatly weakened by the relatively large recess. I

Furthermore, it had the drawback that stones which, during cutting I

with ground contact, such as this when harvesting I

soybeans is necessary, through the cutting finger points to I.

are thrown upwards, I fall into these recesses

clamped against the cutting fingers and both holder and cutting I

10 finger destroy. In addition, the cleaning action of I.

the triangular recess not too good, because in the I

recess for squeezed cutting material in the opening and I.

is pushed because one side is not up to the center axis I.

of the mowing finger. I

In all known embodiments, where certain I

cutouts in front of the knife rail in the holder blade I

there is a further drawback in that the relative I

large dimensions the knife clamping thumbs cannot be effective I

work, resp. wear very strongly. I

Starting from this known prior art, I.

the object of the invention is to provide a container, I

which by a particular embodiment of the in I

knife holder present recesses on the one hand with regard to

the reciprocating mass is reduced and thus with all I.

25 cutting systems with oscillating action can be applied, I.

furthermore, substantially the same stability as a mass

sieve holder, has an effective cleaning effect at I.

I has all types of mowing fingers and other types of counter blades

and with respect to loose stones flung upwards I.

30 is insensitive. I

This problem is solved by the invention with I.

a knife holder for harvesters mowers with I.

an I also present or not present in the base side

recess, which is characterized in that in the holder tray I

35 two or more recesses are present, which up to before the I

knife ring, resp. in front of the cutting rail. I

8900578.

♦ -4-! N <

Between these recesses there are ridges of container material, which form additional cleaning edges and further stabilize the container tray.

Because the recesses are smaller than with the known holders, stones which are considered capable of causing damage to the holders and counter-knives due to the order of magnitude can no longer settle.

In addition, a container has proved to be particularly advantageous, in which, in addition to the recesses according to the invention, in the container tray, the long-known recess in the base side is also present.

The shape of the recess present in the holder tray can be designed in many ways. In addition to a round recess or a square recess, one or more of these recesses may, for example, have a drop-shaped, rectangular, oval or crescent-shaped form.

Said embodiments of the recesses present in the holder tray have proved to be particularly effective.

It has further been found that it is particularly advantageous if the spine located between the recesses in the holder tray widens towards the base side.

According to the invention, the recesses in the holder tray are effectively obtained by punching. Therefore, the side walls of these outlets present in the container tray are. 25 openings normally perpendicular to the top, resp. mounted on the underside of the holder tray.

It has also proved to be extremely effective if the walls of the recesses present in the holder tray, at least partly, on a holder side in the plane of the holder tray, have an angle of less than 90 °. By means of such an embodiment, the cleaning edge is on the one hand designed as a cutting edge and, on the other hand, a large opening is simultaneously created in the recess through which the material separated from the cleaning edge can fall. It has proved particularly effective when the walls of the recesses in the holder tray 8900578.

& I

at least partly on one side of the container, on the plane I.

of the holder tray, have an angle of 30-45 °. I

Because the cleaning effect of the cut-out I

rings obtained in accordance with the invention in I.

5 the rule in connection with the counter blades of the mowing fingers I

has proved particularly effective when I

the walls of the recesses present in the holder gap, I

at least partly, on the sharpened container side, on the I

plane of the container tray, an angle of less than I.

10 have 90 °. As a result, the same holder I

On the one hand, the sharpened knife edge is present, while I

on the other side, on the same side, the walls of the container I

blade cutouts also angle less than I.

90 ° and thus the cleaning edges thus formed have the form I.

15 of cutting edges, which with the counter blades of the I

fingers work together. I

Although for this cutting and cleaning effect the in I

recesses present on the holder tray normally have only one

partial chamfer of the sidewall is sufficient, I

20, however, preferably on an all-sided bevel of the I

side wall of these recesses is preferred because I

thereby widening the recess and the separated material I

can fall off more easily. I

In the preferred embodiment discussed above, I

Wherein, in addition to the recesses according to the invention in I

holder blade also has a recess in the base side, I

this recess in the base side becomes effective in the form I.

and size of the holder tip. Therefore it is I.

possible, during manufacture the holder tip of a holder from I.

30 punch out the base side of the neighboring container. On this I

way can reduce the material consumption when making containers I.

be greatly reduced. I

On the basis of the drawings shown in the accompanying drawings I

To give exemplary embodiments, the invention is described below in I.

35 detailed explained. I

8900578.

i -6- · »

In the drawings: Fig. 1 shows a partial view of a cutter bar with cutting fingers and cutter blades holders in the active position according to the invention; Fig. 2 shows a particularly advantageous embodiment of a mowing knife holder according to the invention with two recesses and an extra recess on the base side; fig. 3 another mower blade holder according to the invention with two round recesses and a third recess directed towards the holder tip; Fig. 4 shows three mowing knife holders placed side by side according to the invention with distinctively shaped recesses; Fig. 5 shows a vertical section along the line A-B 15 in Fig. 2, which shows a particularly advantageous embodiment of the knife holder according to the invention with regard to the wall of the recess.

In Fig. 1, the cutting fingers 2 are screwed to finger bars 1 with their rear ends. The cutting fingers 2 can each be designed as one unit, but also as double fingers or multiple fingers. In order to keep the mowing fingers stable laterally, the individual mowing fingers with spacer wings 3 touch each other and thus support one another. Moreover, these wings serve as guides for the knife rail 4, on which the separate cutting blade holders 5 are screwed or riveted. In the case of double, multiple fingers, instead of the spacing wings between two mowing fingers, a respective connecting spine is provided, which optionally serves as a guide for the knife rail 4.

The cutting blades holders 5 cooperate with the counter blades 6 of the cutting fingers. The counter blades 6 can be placed both below and above the holder. A system is also known in which both the lower finger and the upper finger are designed as a counterknife, wherein the holders are alternately mounted on the knife rail 4 with the cutting edge upwards and then again with the cutting edge downwards.

8900578.

In Fig. 1, the holders 5 are in most mowing

beam constructions common change point shown. At the I

reciprocating movement, the holder top describes an I

which then extends from the cutting shaft to the cutting shaft. This I

5, therefore, corresponds to the distance from cutting tip to I.

cutting tip and because the holders of the knife rail are against I.

abutting each other, it also corresponds to the container I

width. Although systems are also known, the I

stroke is substantially larger than the container width, but I

10 systems are rare. I

In the cutting process it now often happens that I

poorly cutting crops are pulled over the counterknife I

and because of the spacer 3, resp. the in the same place I

applied connecting ridges with double, multiple fin I

15 gers cannot pull backwards. This cutting material I

then hopes for the I indicated by the reference numeral 8

in fig. 1, on and block the I after a short time

blade. Time-consuming cleaning activities are necessary I

which sometimes have to be repeated in very short periods of time

Turn 20. In addition, the drive elements of the I

blade very heavily loaded. I

In the known embodiments, the I

most favorable self-cleaning effect due to a recess in I.

the blade holder, which has the critical range 8 of the I.

25 cutting fingers cleans. Because this recess is therefore relatively I

must be large, the container is thus greatly weakened. 1

Furthermore, if the holder is between two I

mowing fingers, stones thrown upwards in this out- I

and be clamped. I

In the embodiment of the invention, I

and against the container through the back 9 considerably more stable. I

In addition, this back 9 prevents certain large stones I.

clamped in the recesses and as special I

a significant advantage, additional cleaning edges are created in this I.

35 cutouts. I

8900578.

-8-

V

*

As already mentioned, the shape of the recesses can be chosen differently, depending on for which cutting material a shape proves to be particularly favorable.

The shape of this recess also depends on the counter blades used.

Figures 3 and 4 show preferred embodiments of the knife holders according to the invention. Naturally, distinctly shaped recesses can be provided on one and the same holder, or holders which can be combined on a cutting blade can be distinguished.

In particular, in order to realize a cleaning opening far in front of and near the container points, for example harvesting material, such as flax, which is difficult to cut, an additional recess can be provided, as shown in Fig. 3, which extends into the container tip.

A combination of two teardrop-shaped recesses (12) according to Fig. 2 has proved to be particularly advantageous. In this embodiment, the flat majority of the recesses are in the range in which stability is least affected. In addition, the back 9 widens towards the knife rail, which also increases the stability and the cleaning edges 10 run obliquely on the cutting shaft, thus favorably influencing the cleaning effect.

It is clear from the cross-section shown in Fig. 5 along the line AB of Fig. 2 that the walls of the recesses 12 present in the holder tray on one holder side, namely the top holder side, with respect to the plane of the holder blade, have an angle of less than 30 90 °. By such an embodiment, the cleaning edges are formed into cutting edges and, in addition, the additional effect is that the recesses 12 become wider downwards, so that the material separated by the cleaning edges can easily fall downwards.

The sharpened holder side is also the top side of the mowing knife holder shown in section in Fig. 5.

8900578.

Claims (11)

1. Knife holder for mowing knives of harvesting machines with a recess in the base edge, if any, characterized in that I that in the holder blade extends up to before the knife rail (4), I resp. two or more recesses (12, 13, 14, 15) are provided in front of the knife rail (4). I Knife holder according to Claim 1, with a recess present in the base side, characterized in that the holder blade extends up to the knife rail (4), respectively. two or more recesses (12, I 10 13, 14, 15) are provided in front of the I knife rail (4). I Mower blade holder according to claim 1, characterized in that one or more of the recesses (12) are drop-shaped. I Mower blade holder according to claim 1, characterized in that one or more recesses (13) are rectangular. I Mower blade holder according to claim 1, characterized in that one or more of the recesses (14) are oval. I Mower blade holder according to claim 1, characterized in that one or more recesses (15) are crescent-shaped. I 7. Blade holder according to any one of claims 3-6, characterized in that the back located between two recesses widens towards the base side. I Mower blade holder according to claim 1, characterized in that the walls of the recesses present in the holder blade have an angle of less than 90 °, at least partly, on a holder side in the plane of the holder blade. I 9. Knife blade holder according to claim 8, characterized in that the walls of the recesses present in the holder blade have an angle of 30-45 ° at least partly, on one holder side, on the plane I of the holder blade. . I 89 005 78. * V -10- Mower blade holder according to claim 8, characterized in that the walls of the recesses (12) present in the holder blade are at least partly, on the sharpened page, an angle of less than 90, related to the plane of the holder blade. ° C. Mower blade holder according to claim 8, characterized in that the walls of the recesses present in the holder blade on one holder side, with respect to the plane of the holder blade, have an angle of less than 90 °. 8900578.