DE1203033B - Cultivator-like tillage tool - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

AOIb

German class: 45 a - 35/24

Number: 1203 033

File number: A 45899 III / 45 a

Filing date: April 28, 1964

Opening day: October 14, 1965

Cultivator-like tillage tool

Applicant:

A / S A. Andersens Staalvarefabrik,

Godthaab Jylland (Denmark) Representative:

Dipl.-Ing. G. Schmitz-Helff, patent attorney,

Cologne, Gereonshof 38

Named as inventor:

Anders Andersen, Godthaab Jylland (Denmark)

Claimed priority: Denmark of May 4, 1963 (2120)

The invention relates to a cultivator-like soil cultivation tool, in which three layers of leaf springs are fastened together at one end to a beam of the cultivator frame and with a leaf spring carries the tillage tool.

The well-known cultivator-type soil cultivation tools are either provided with strong springs, if they are used in heavy autumn cultivators, stubble cultivators or similar devices that are used in Lowering stubble, grass or other weeds can be used, which have a heavy Cultivators with strong and deep tines are required. But if in the spring for the sowing If a light seedbed is to be prepared, then one has to prevent the sometimes frugal ones from drying out Avoid winter or spring wetness, use a light harrow with weaker springs and tines, that don't go that deep. The spring harrow has to be proportionate even with small loads Feather far, because otherwise it will not keep itself clean of root fibers and other weeds.

On the other hand, there is a desire that harrowing 2

carried out with the same harrow in spring and autumn can become, possibly with a different one stone, a predominant bending stress Stresses adapted weight load or 25 occurs, so that there is a risk that the before one other simple modification of the standing end of the tillage tool Device. bearing leaf spring breaks off or even after the purpose of the invention, it is therefore, a cultivator-like is bent downwards.

To realize soil cultivation tool, which is in another known embodiment

Both for a light and for a heavy harrow 30, the free end of the inner leaf spring is also suitable for Bear and which is set up so that the processing tool. But even if the entire length of the tine springs is completely free of the end of the inner leaf spring, a soil is used again so that all tines of the cultivator are attached to the cultivating tool, then the above statements apply in the same way to earth pressures of the same magnitude over the react, so that for breaks of the prongs even at 35 disadvantage of this arrangement too.
hard, possibly eccentric impact forces a possible- One has already proposed a leaf spring,

there is little risk. whose front free end is also used as a floor

Cultivator-like tillage tools are known. This one witness with three leaf springs, which together with a leaf spring, however, is not a second leaf spring associated with an end attached to a beam of the cultivator frame, rather this leaf spring has only one protection. These leaf springs are at rest and also in umbrella, which has the task of keeping branches of trees or the position of use constantly against each other and have the like to keep them from the cultivator tines,
a Fedei characteristic which provides a solution to the invention. All these disadvantages of the known arrangements

object according to the invention is not made possible because they are avoided according to the invention in that is not suitable for cultivating the soil in the case of the cultivator-like cultivating tool different seasons with good success used the leaf springs in the unloaded position except for theirs to become. The known embodiment also has a common bracket on the beam at a distance because the processing tool have each other in its engagement, so that when the load position in the soil in tangential or over-tine through soil forces the middle spring up predominantly tangential direction, the extension of a 50 to rest on the tool handle and the inner Leaf spring represents the disadvantage that in the case of a high leaf spring until it comes into contact with the middle leaf spring Have stress, for example when bumping into limited free movement.

509 717/92

3 4

This achieves an expedient, step-wise tool holder 4 lying in one plane. The tool-climbing one Spring force with a gradual and sudden holder 4 and the tine tip 1 together make up the lent increase of the Erddrackes on the cultivator tines. earthworking organs of the soil cultivation plant

In a further development of the concept of the invention is a testimony.

the tool designed so that the at the free end of the 5 to the upper end of the tool holder 4 is a External spring attached tillage work clamping jaw 5 put around and by means of a clamping tool or the tool holder one of the curvature bolt 6 is bolted. This clamping bolt is in a the leaf springs have opposite curvature, semicircular notch on the rear side (top) the free end of the central leaf spring is introduced up to the holding of the tool holder 4, the rest of the tion of the tool or tool holder to the io is held in that two pairs in the outer leaf spring is enough and the holder at the same time jaw bent wing 7 with their a stop for the free end of the middle sheet - narrow edges on the sloping rear pages has spring, while the inner spring is shorter than (upper sides) of the tool holder 4 press while the middle spring is and at its free end one of the oblique front sides (undersides) of the same outwardly bent nose to the stop on the 15 part in a forged in V-cross-section inverted Has surface of the central spring. ren part 8 of a front leaf spring 9 (main spring)

This ensures that the full length of which leaf spring is stored on the front one is stored

Springs are used, even if they are only fully side (underside) in the V-bracket 10 of the clamping jaw 5

are arranged close to each other, and rests.

Although also with springs, the smaller manufacturing 20 The clamping bolt is as a hardened steel screw

Have inaccuracies in the design. When formed of great tensile strength and on the one hand

light harrows where the tines are not very deep in the side with an inner hex in a knurled one

If soil penetrates, such a prong is provided with a head 11. On the other hand, this one owns

measure soft springs because only its front leaf spring bolt has a nut 12 and a washer 13,

- which is long in relation to its thickness and therefore by means of which the bolt is tightened against the head

soft springs - used in normal spring harrows. In the upper part, the clamping jaw 5 has a

is spoken. Should the cultivator-like tool have a pair of inwardly curved guide jaws 14, which with

hard piece of earth or a similar obstacle ample play the lower part 15 of a middle one

meet, then one or both auxiliary springs will enclose leaf spring 16 (first auxiliary spring). If the

claimed. 30 cultivator tines is not used, the

With heavy harrows with deep tine position part 15 on the lower side (inside) of the guide, all three springs will work immediately because they bake. When the cultivator tine is heavily used Stress on the tines in normal autumn harrows is, the part 15 of the spring leaf 16 on the other hand iuht is so great that the play between the individual ends of the blades, designed as stop surfaces 17, is at the top springs is canceled immediately. 35 of the wings 7.

The middle spring just behind the front spring The upper part of the leaf springs 9 and 16 is together

is usually as long or longer than the front feather. men with a corresponding part of a rear

In the case of a hard and especially hard eccentric leaf spring 18 against the crossbeam or the load on the frame of the tool is this middle cross member 19 of a cultivator spring, not shown in the rest endeavor to frame the system against the 40 by means of a bracket 20 and a bolt 21 to evade the front spring so that the supporting spring is clamped. The rear leaf spring 18 has on her Effect of the middle spring can suddenly stop free end of a forged nose 22, which against and the cultivator tine breaks. In order to prevent this, the spring 16 located in front of it is directed. If the avoid, the cultivator tine according to the invention cultivator tines is not claimed, is between the be shaped so that the stop member is equal to 45 nose 22 and the spring 16 play. If the cultivator is put under heavy strain like a side guide with play around the tines, i. H. when the beans Edges of the middle feather is wrapped around. stress becomes greater after the spring part 15

In the drawings, an exemplary embodiment has come to abut against the stop surfaces 17

a cultivator-like soil cultivation tool is men, the rear side of the spring 16 is for

shown according to the invention, namely shows. Get 50 stop against the nose 22, which also

F i g. Figure 1 is a side view of the tool that spring 18 will help keep the cultivator tines

F i g. 2 is an enlarged cross-section after the support.

Line AA of FIG. 1, To illustrate the applicability of the

F i g. 3 a new tine to hold the springs for both light and heavy

Jaw in an enlarged view, 55 harrows are schematic representations in FIGS. 4 and 5.

Fig. 4 a schematic representation of the suspension positions of the rebound of a known spring

in a known cultivator tine and tine and the cultivator tine according to the invention

F i g. 5 shows a corresponding schematic representation under certain stresses. The reference

ment of the suspension in the letters a to m according to the invention in Fig. 4 give successively

Cultivator tines. 60 following positions of the tine tip of the known

The tip 1 of the cultivator tine, which acts as a jointed cultivator tine when the load increases suddenly.

A curved V-profile is drop forged, stress is on. Correspondingly, the letters a ',

by means of a countersunk bolt 2 with corresponding a ", V to / ', /" and m' successively

Nut 3 on a very strong tool holder with 4 positions of the tine tip of the new tine

attached, which is made of square spring steel. 65 with increasing stress in leaps and bounds. In order to

The tool holder 4 is in the lower part to make it easier to see, they belong together

the tip of the tine is drop-forged so that reference letters and tine loads in

its upper side (front) is shown with the front of a table, indicating

that the maximum vertical rebound is 5 with m tines. Compare e.g. B. the bends in

and m ' for both types of tine is 59 mm:

sharpen sharpen
position Horizontal Remarks position of he Tine bevel no bend of
known
Tine finding
according to
Tine claim
kg here the spring becomes 16 a d 0 claimed - a " 12th - here the spring becomes 18 b b ' 25th claimed C. c ' 50 - - d d ' 75 - e e ' 100 - f f 125 - G G' 150 - H W. 175 - i V 200 - j r 225 - k W. 250 - I. V 300 59 mm vertical - I " 350 Deflection m - 375 59 mm vertical Deflection - rri 400

A dash "-" in a rubric means that the rubric in question has not been used.

When comparing the above table with the measurements, it is clear that the inventive Prongs have a soft ("long") initial spring and a hard ("short", compressed) final spring in relation to the well-known tine.

If you look at the horizontal bends, you can see that the new prong is about 25 mm with a load of 12 kg and about 52 mm (a ' - a " or d - b') with a load of 25 kg, while the known prong is at 25 kg load is only bent out by about 33 mm {a - b).

The new prong is bent about 98 mm (a ' - c') and the known prong about 87 mm (a - c) at a load of 50 kg.

In the last part of the stress test it is exactly the opposite, in that the new tine is significantly stiffer than the known increase in stress from 50 to 300 kg under heavy stress and then recognizes that this increase in stress of 250 kg for the known tine is an increase in horizontal deflection of about 217 mm (a - k) , against only about 156 mm (a ' - k') increase in the deflection of the new tine with the same increase in stress.

Claims (3)

Patent claims: 1. Cultivator-like tillage tool with three layers of leaf springs at one end are attached together to a beam of the cultivator frame and a leaf spring that Tillage tool carries, thereby characterized in that the leaf springs (9, 16, 18) in the unloaded position except for their common Bracket on the bar (19) have a distance from one another, so that when the tine is loaded By ground forces, the middle leaf spring comes into contact with the tool handle and the inner one Leaf spring have limited free movement until it rests against the middle leaf spring. 2. Tool according to claim 1, characterized in that the at the free end of the outer Spring (9) attached soil cultivation tool (1) or the tool holder (4) one of the Curvature of the leaf springs (9, 16, 18) have opposite curvature, the free end (15) the middle leaf spring (16) to the holder of the tool (1) or tool holder (4) to the outer leaf spring (9) is enough and the holder at the same time has a stop (5) for the free end (15) the middle leaf spring (16), while the inner spring (18) is shorter than the middle spring (16) is and at its free end an outwardly bent nose (22) to the stop on the facing Has surface of the central spring (16). 3. Tool according to claims 1 and 2, characterized in that the attachment of the Soil cultivation tool (1) or the tool holder (4) at the free end of the outer The leaf spring (9) on the side facing the central leaf spring has a central leaf spring (16) has encompassing and the narrow side leading stop (5). Considered publications:
U.S. Patent Nos. 1,762,907, 1107,570 1 sheet of drawings 509 717,92 10. 65 © Bundesdruckerei Berlin