DE1224077B - Soil cultivation device with tool holders that can be moved back and forth across the direction of travel - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

AOIb

German class: 45 a - 19/06

Number: 1224 077

File number: St 22488 HI / 45 a

Filing date: August 3, 1964

Opening day: September 1, 1966

The invention relates to a soil cultivation device with tool holders that can be moved back and forth across the direction of travel and that are in one Frame mounted rocker arms are arrtreibbar by push rods. Soil cultivation equipment, e.g. B. Harrows of this type have, as a result of the transverse movement of the al ^ tines, trained tools opposite the usual drag harrows have the advantage that only one is used for cultivating the soil before sowing Operation is required; an undesirably strong soil compaction by the tractor is eliminated. Compared to known harrows with tines rotating about an axis arranged transversely to the direction of travel. or shovels, harrows with reciprocating tines have the advantage of plowing under Do not tear grass, roots and the like to the surface, so that cutting and scattering of Weed roots are absent. Own the well-known harrows with reciprocating tine holders however, other significant disadvantages. Your Zinkenhaiter, which are occupied with straight tines, are z. B. Driven in opposite directions via a gear transmission by cranks offset by 180 ° to one another so that they are in different lateral dead center positions at the same time. This makes one The tine holder runs extremely strongly, intermittently, which is only larger due to the arrangement Inertia masses can be dampened to some extent. These centrifugal masses increase the weight the harrow considerably, and accordingly powerful tractors are required. The great weight the parts to be moved, on the other hand, require a considerable drive power. If like this In most cases, the tines protrude vertically into the ground, they also have a large effect Clod accumulation and thus insufficient soil cultivation, because the soil from the tines laterally is pushed away. The tines thus have to overcome a considerable resistance to the ground the power requirement increases. One working under such unfavorable weight and strength conditions The harrow must be extremely stable, which inevitably adds to the weight and dimensions of the harrow enlarged.

There are also known power harrows in which the laterally reciprocating tool holders can be driven via rocker arms and push rods mounted in a frame. The push rods are hinged to the crank arms of a cranked shaft. In rough practical operation, however, such devices could not prevail because they are extremely prone to failure. Through the uplifting tillage device with transverse to
Moving the direction of travel back and forth
Tool holders

Applicant:

Werner Stierli, Hedingen, Zurich (Switzerland)

Representative:

Dipl.-Phys. H. Schroeter, patent attorney,

Munich 25, Lipowskystr. 1Ö

Named as inventor :,

Werner Stierli, Hedingen, Zurich (Switzerland)

Claimed priority:
Switzerland of August 15, 1963 (10132),
dated October 10, 1963 (12 482)

borrowed resistance forces of the ground, combined with inevitable impacts by stones, etc., are In the case of crank drives, the push rod bearings with their relatively small diameter are so highly stressed that that they are quickly knocked out. Even if the cranked shaft is dimensioned accordingly strong, This already results in a further disadvantage, because this means that the cranked arms also lie further apart, because excessively sharp bends at the cranking points must be avoided. The wave also becomes undesirably long, and. the attachment points of the push rods are far apart, so that a good power output cannot be achieved.

These disadvantages are avoided in the soil cultivation device according to the invention. According to the invention the drive-side ends of the push rods are each mounted on an eccentric disk, and the Eccentric disks sit offset from one another by an angle deviating from 180 ° on a drivable and shaft mounted in the frame. This first of all achieves that the bearing forces can be transferred to both sides of the bearing shaft, as the push rod bearings are on the eccentric shaft also include this wave. In addition, the device according to the invention is a power output from the Shaft on the push rods very close to the middle one

609 658/116

3 4

Level possible; the shaft is also supported essentially by means of a ball bearing, a link 13 6,

lower burdened. at its free end part one to the tab 12a

The drive of the tool holder is articulated via oscillating parallel bracket 14 6; analog is par-

Finally, the lever and the eccentric are identical to the rocker arm 106 on the transverse axis

moderate back and forth movement of this holder with only 5 lla by means of ernes ball bearings a handlebar 13 α loaded

low vertical movement of the prongs, the device, at the free end part of a to the tab 12 b

Bearing axes of the rocker arm is articulated on the tool shark parallel bracket 14 a. Since the oscillating

to absorb the impacts and to use the eccentric levers 10 a, 10 & on the outside of the push rod

tern are able to keep away, while on the other hand gen 9 a and 9 b are and also the tabs 12 a,

the offset of the dead center times of the tool io 12 b arranged on the outside of the rocker arm

halter an intermittent run of the eccentric net is, despite a relatively large mutual

prevents the axle spacing from resulting in an extremely quiet, practical distance between the two rows of tines

vibration-free running of the tool holder leads. of the two eccentric disks 6 and thus the load

As a result, the bottom ger 2 according to the invention works relatively small. The center distance of the pivot point

Machining device hit the rocker arm 10 a, Ub on the associated one, even without a flywheel

free and ensures a push rod 9a or 9b from the longitudinal axisella even with heavy soils

flawless processing. As a result of the low or Ub is approximately equal to the eccentricity of the

Vertical movement is a tearing out of weeds, eccentric discs 6 and expediently the same or how

Crap and the like excluded. drawn, slightly larger than the distance between the

The soil cultivation device according to the invention-20 -stelle-the tabs 12a, 12b or 14a, 14 & of "the

can, depending on what kind of tools are attached to the longitudinal axis assigned to the work, so that between the eccentric

tool holder are set, both as a harrow and bracket, no or only a small reduction

can also be used as a cultivator or hoe. The lower end parts of the tabs 12, 12 &

the. For this it is only necessary that the tines and 14a, 146 are at an acute angle of

holder against holder of shovel or hoe 25 20 to 40 ° and preferably 30 ° to the vertical

exchange witnesses. angled forward and wear one in pairs

In the drawing, two exemplary embodiments are rod-shaped tine holders 15. On each of the two

of the device according to the invention shown; it shows tine holder 15 is a plurality of in the same

F i g. 1 is a plan view of a harrow arranged according to the distances from one another, the angled

Invention, 30 development of the tabs correspondingly obliquely downward

Fig. 2 is a vertical longitudinal section after the protruding prongs 16 attached. On frame 1, i.e.

Line H-II in FIG. 1, on the preceding cross member of the latter

F i g. 3 shows a vertical cross section through the two guide shoes 17 with the adjacent one

Harrow, - i.e. previous row of tines, bent lower-

4 shows schematically and in plan view the opposite end part; this end part has a

lateral arrangement of the tines of the harrow after the sharp front edge and penetrates relatively when harrowing

Fig. 1 to 3.. deep into the ground, so that a flawless

In Figs. 1 to 4 of the drawing, a right-hand guidance of the harrow is guaranteed. angular frame composed of U-profiles. The arrangement is such that the prongs 16 In the middle of the cross members of this frame 1, 40 of each prong holder 15 is mounted at exactly vertical position, in which a drive of the associated rocker arm is mounted exactly in shaft 3 on balls is. The end of the shaft 3 protruding beyond one of the center between the positions, the two bearings 2 protruding, is occupied with adjacent prongs 16 of the other tine holder of a power take-off shaft (not shown) of a tractor, if its rocker arm is exactly lowered, with which the frame 1 is supported by a 45 on the right, as shown schematically in FIG. 4 in FIG. 3 is indicated by dash-dotted lines. Furthermore, the arrangement is such that carrier 4 can be connected. On the drive the oscillation path α of the prongs approximately the same shaft 3 sit two through a sleeve 5 at a distance of half the prong distance b is. This ensures that the eccentric disks 6 are held one by one, on which the two rows of tines are not effective in the same driver base area by means of a ball bearing 7, but ring 8 is jointly supported. The two eccentric disks 6 but 'the whole of the tine holders are coated by a section of the ground deviating from 180 ° between NEN. Since the 100 and 170 ° and preferably at about 150 ° oscillation paths of the prongs 16 of the two prong-end angles (FIG. 2) arranged offset to one another do not overlap, it is avoided that net. On each of the two driver rings 8 is a 55 the prongs of the subsequent Zin push rod 9 a or 9 b attached, with a kenhalterers in a superfluous way in already harrowed push rod 9 a after one and the other ground have to work. It is useful how the push rod 9 b is directed to the other side. Drawn example, on the trailing Zinkenhal-On the opposite sides of the free ter 15 one more prong is provided than on the leading end parts of the two push rods 9a, 9b by means of 60 extending prong holders, the outermost two of a ball bearing each having a rocker arm 10α or 10 b prongs of this trailing prong holder somewhat articulated, the middle part of which can be shorter than the other prongs by means of a further prong. Likewise, ball bearings each attached to a frame 1, it can be expedient, on the preceding Zin-Längachsella or 11 & is mounted. Provide somewhat longer and thus somewhat deeper sides of the free end parts of the tines piercing the ground on the tine holder than on the rocker arm 10a, 10 6 by means of a ball bearing. Also stored on the correct one tab 12a or 126 each. Parallel ζμ choice of the mutual distance between the two Zindem rocker arms 10 α is on the longitudinal axis 116 kenhalter 15 must be taken into account; from the tines

of the preceding tine holder in the space between the two rows of tines let through stones must be able to emerge again between the tines of the following tine holder; this is how fig. 4 shows, this is possible if the diagonal spacing c between the prongs of both rows is at least equal to the prong spacing b in the rows. The row spacing d can be slightly smaller than the tine spacing b.

The described harrow, with its tines inclined backwards and offset in their working areas, results, as tests show, in perfect soil cultivation which cannot be achieved with previous drag or rotary harrows; The effort required is very small due to the eccentric drives acting via rocker arms, so that even small tractors can easily be used as tractors. The harrow described could also be designed as a self-propelled device, ie provided with a corresponding wheel frame and drive motor. The weight and dimensions of the harrow are relatively small, and all elements located in and above the frame 1 can be covered by a cover hood attached to the latter. Since all bearing points of the drive elements (eccentric — push rods — rocker arm and handlebars — tabs) are provided with ball bearings, maintenance of the harrow is very easy and is practically limited to the z. B. by hosing feasible cleaning after use. As a result of the simple structure and the good accessibility of all elements, these can also be exchanged without difficulty if necessary.
- Although in general, as in the example described, only two tine holders are provided, there could also be three or four of them, the arrangement always being such that never more than one tine hook is just in a dead center position; As mentioned, this not only results in practically shock-free and vibration-free running of the tine holders, but also ensures that the tine holders can be started from standstill in any position of the latter with little effort.

Claims (8)

45 claims: 1. Soil cultivation device with tool holders which can be moved back and forth transversely to the direction of travel and which can be driven by push rods via rocker arms mounted in a frame, characterized in that the drive-side ends of the push rods (9 a, 9 b) each on an eccentric disk (6, 7) are mounted, and the eccentric disks are offset from one another by an angle deviating from 180 ° and sit firmly on a drivable shaft (3) which is mounted in the frame (2). 2. Soil cultivation device according to claim 1 with two tool holders, characterized in that that the angular displacement of the two eccentrics (6, 7) is between 100 and 170 ° and preferably Is 150 °. 3. Soil cultivation device according to claim 2, characterized in that each eccentric has an eccentric disc (6) on which a driver ring (8) is mounted by means of a ball bearing (7), on which one end of the push rod (9 a or 9 b ) is attached. 4. Soil cultivation device according to claim 3, characterized in that each tine holder (15) is attached to two brackets (14 a, 12b or 12a, 14 b) which are angled in accordance with the tine inclination, the one bracket (12 a and 12 b) is articulated on the free end part of the associated rocker arm (10 a or 10 b) and the other tab (14 a or 14 b) on the free end of a link (13 α or 13 b) , which is on the associated longitudinal axis (lla or . Ub) is stored. 5. Soil cultivation device according to claim 4, characterized in that all bearing and articulation points between the push rod, rocker arm, handlebar and bracket in a manner known per se Have ball bearings. 6. Soil cultivation device according to claim 5, characterized in that the center distances of the articulation points of the push rod (9 a, 9 b) and the tab (14 a, 14 b) on the rocker arm (10 a, 10 b) from the longitudinal axis (11 a, Ub) are approximately the same among themselves and approximately correspond to the eccentricity of the eccentric disks (6). 7. Soil cultivation device according to claim 2, characterized in that the oscillation path (α) of the tools (16) of one holder (15) between the oscillation paths (a) of two adjacent tools (16) of the other holder (15), the mutual Distance (b) between the tools (16) in the two rows of tines is equal to or smaller than the diagonal distance (c) between adjacent tools in the two rows and equal to or greater than the mutual distance (d) between the two rows of tools themselves. 8. Soil cultivation device according to claim 1, characterized in that the front cross member of the frame (1) two bent backwards at their lower end part and one sharp one Leading edge having guide shoes (17) are attached. Considered publications:
German Patent No. 810,673;
Austrian Patent No. 190 319;
Swiss Patent No. 353 201. 1 sheet of drawings 609 658/116 8.66 ® Bundesdruckerei Berlin