CZ290919B6 - Soil working implement - Google Patents

Abstract

Disclosed is a soil working implement having groups of implements (2, 3) and towing rolls (28) mounted in swingable manner through the mediation of swing mounts (17, 18) arranged horizontally in the working direction (7) ane being placed in the center of the implement group (2, 3), and in swingable manner through the mediation of a supporting arm (9) to a transport position situated perpendicularly to the working position At the same time said supporting arm (9) consists of a central arm (12) and side arms (13, 14), which swing on the central arm (12) in axes (15, 16) and which have pivoted bearings (17, 18), by means of which the implement groups (2, 3) are attached. Stops (25) intended for restricting swing of the implement group (2, 3) about the pivoted bearing (17, 18) and supported on the side arms (Q13, 14) are arranged in a certain distance from the pivoted bearing (17, 18) on said implement groups (2, 3).

Description

Tillage tools

Technical field

BACKGROUND OF THE INVENTION The invention relates to a wide-engaging soil cultivation device, in particular a circular harrow with at least two driven tool assemblies with respective trailing rollers, which are arranged transversely to the working direction of the tractor in the working position. The soil tillage implement is further provided with a support arm on which groups of trailing rollers are mounted in a height conceivable manner, the support arm being connected from one side to the tractor by means of a coupling device.

BACKGROUND OF THE INVENTION

Circular gates of this type are used everywhere in the dark, where high surface power is required.

German Patent Specification No. 9,405,585 discloses circular gates consisting of two groups of working tools which are connected to one another by means of a hinge located in the direction of travel. For transport purposes, this tool is equipped with a so-called longitudinal travel device. The disadvantage of this known embodiment is that the depth guidance of one group of work tools is strongly influenced by the other group of work tools and is therefore not independent of one another. Another disadvantage of this embodiment is the very demanding adjustment of this tool from the work area to the transport position, since the driver must lower the tractor, disconnect the implement and reconnect the implement after folding the drawbar. In addition, it is disadvantageous that the additional weight of the drawbar and the platform truck must be towed together with the implement during work.

German Patent No. 3,107,696 discloses circular gates, the side arms of which are hinged together with groups of tools which are guided by a parallel hinge. This guiding of the implement requires a support arm with support wheels, which has the disadvantage that the implement is very expensive. Also, the distance between the tractor and the implement must be greater than usual, so that the wheels in the stowed position are not assigned to the tractor cab. This leads to considerable strain on the front axle and thus deteriorates the tractor's maneuverability.

The hinged gates of German Patent Specification No. 2,302,828 are also hinged, but do not allow individual tool groups to adapt independently to the soil. The result is then unevenly cultivated according to the ready for sowing.

French patent application no. 2 702 628 discloses a wide-angle circular gate with a central pivot axis which, although it allows the individual tool groups to adapt independently to the soil, must also be rebuilt for transport. Thus, the necessary travel and / or support device makes the tool unnecessarily heavy, expensive to manufacture and expensive.

According to EP-A-0 422 721 a device is known in which front and rear tool groups are formed. The front toolbox prevents the driver's view, requires at least three sub-groups, and blocks the front of the tractor so that no other implements can be placed.

ZDE-A1-2 220 162 is a well-known tillage tillage implement. The gates are hinged by means of an appropriate support, but without reference to how such a hinged support should look in the circular towing gates.

-1 CZ 290919 B6

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The object of the present invention is to provide wide-width gates which can be easily moved from the working position to the transport position and vice versa, which are folding and tilting and which ensure good adaptation of the soil to the tool groups at favorable center of gravity.

This object is achieved according to the invention in that the tool groups with the trailing rollers are supported on the one hand by means of pivotable bearings arranged horizontally in the working direction, which are arranged in the center of the tool group and on the other . In this case, the support arm consists of a center arm and side arms which are mounted on the center arm in a pivotable manner and have pivotable bearings by means of which tool groups are connected. On the tool groups, stops are provided at a distance from the pivot bearing for limiting the pivot of the tool group around the pivot bearing, which are supported on the side arms.

The hinged gates thus formed can be simply folded up, quickly rebuilt and adapted to the soil to be cultivated, i.e. each of the two tool groups can move freely around the respective pivot bearing within the limits limited by the stops, thus achieving a dimensionally narrow transport width. The stops are spaced from the pivot bearings so that, in addition, the tool groups are attached to the side arms to limit the range of movement. The stops are located on tool groups and rest on the side frames.

The embodiment according to the invention allows a simple tilting of the tool groups from the working position to the transport position and vice versa.

Depth adjustment or adaptation to different conditions or different equipment is possible without any problems in that the trailing rollers are connected to the tool groups by means of their support and height-changing device.

According to the invention, the movement of the tool groups in or out of the working position can be shaped such that the side arms in the tilting direction are provided with levers protruding in the tilting direction and the central arm bearings in which the side cylinder hydraulic cylinders are pivoted . With the hydraulic cylinders arranged in this way, each of the tool groups can be safely swung into the desired position. In this case, the tilting limitation is ensured so that the tool groups can be adapted to the cultivated soil, but the tilting for transport is ensured.

Such limited tilting is preferably achieved by the design in which the stops are elastic. This can be done, for example, by rubber elastic stops between the tool groups 40 and the side arms, or also by springs. In this case, it is advantageous if these stops are adjustable, preferably from 0 [deg.] To 10 [deg.]. These stops ensure good adaptation to the cultivated soil as well as tilting to the transport position without the driver having to make any adjustments to the tool combination.

The invention is characterized in particular by the fact that the tillage implement thus formed has a wide working width, it can be easily and quickly tilted or tilted into the working position, whereby the driver does not have to leave the tractor at all. In the transport position, it is then ensured that the jointed groups of tools do not exceed the permissible transport width. Above all, however, excellent adaptation of the individual tool groups to the cultivated soil is ensured or guaranteed during the work.

-2GB 290919 B6

BRIEF DESCRIPTION OF THE DRAWINGS

Further details and advantages of the subject matter of the invention will become apparent from the following description and the accompanying drawings, which show an exemplary embodiment with the necessary details and components. Here means:

Giant. 1 is a front view of a circular harrow with two tool groups, one in the working position and the other in the transport position,

Giant. 2 side view of circular gates with tool groups and trailing rollers, without support arm,

Giant. 3 is a top view of one of the tool groups of FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION

In FIG. In the front view, the circular gates 1 with trailing rollers (not shown) are shown. These circular gates 1 consist of two tool groups 2, 3, which are pivotable about the support arm 9 in the tilting direction 8.

The individual tool groups 2, 3 consist of a plurality of working tools 4, 5 which are rotated around non-marked axes not specified here, their drive being secured by the drive means 24.

When the rotary gates 1 move in the working direction 7 shown in FIG. 2, the tool groups 2, 3 are tilted in the tilting direction 8, that is, at right angles to the working direction 7. The support arm 9 is by means of connecting means 10, 11, i.e. and a lower link arm attached to a tractor (not shown).

The support arm 9 consists of a center arm 12 and side arms 13, 14 which are pivotally connected to the center arm 12. The side arms 13, 14 pivotal about the axes 15, 16 are provided at their ends with a pivot bearing 17, 18.

The center arm 12 comprises not only the axes 15, 16 where the side arms 13, 14 are articulated, but also the articulated bearings 21 which serve to connect the hydraulic cylinders 22 operating the levers 20 provided at opposite ends of the side arms 13, 14.

The pivoting of the tool groups 2, 3 around the pivot bearings 17, 18 is limited by stops 25. These stops 25 are connected to the tool groups 2, 3 and are supported on both sides on respective side arms 13, M. The stops 25 are adjustable in this case. In addition, for the purpose of transport, the anti-tilt safeguards 26, 26 'are provided, by means of which the two tool groups 2, 3 which are in the transport position, i.e. tilted in height, are firmly connected to each other.

The PTO shaft is shown in dashed lines only in FIG. 1, and its detailed embodiment is not shown here.

In FIG. 2, the working mixture of the circular gates 1 is shown, and the pivoting mounts 17, 18 are also shown. FIG. 2 also shows the connection of the trailing roller 28 to the tool groups 2 and 2, respectively. 3, by means of the support 29. The attached trailing rollers 28 are pivotably connected to each of the groups by means of the supports 29, and their height adjustment can be achieved by means of the device 30.

-3GB 290919 B6

Also, the embodiment of the support arm 9 is not shown in detail here. However, there are usually used side shields 31 of circular gates.

FIG. 3 shows a top view of the tool group 2 which is connected to the support arm 59 of FIG. 1. The trailing roller 28 here follows the tool group 2, wherein the device 30 serves to adjust the height of the trailing roller 28.

All features apparent also from the illustrations may be considered as the essence of the invention, either alone or in combination.

Claims (6)

PATENT CLAIMS 1. Cultivation tools, in particular rotary harrows (1), with at least two tool groups (2, 3) with driven working tools (4, 5) and with attached rollers (28), which are positioned transversely to the working position in working position direction (7) of the tractor and center 20 by means of a support arm (9) on which the tool groups (2, 3) with trailing rollers (28) are mounted are movable in height, the support arm (9) being connected to the tractor by means of a coupling device, that the groups of tools (2, 3) with the trailing rollers (28) are supported, on the one hand, by pivotable bearings (17, 18) arranged horizontally in the working direction (7), which are located in the center of the group of tools (2, 3); on the one hand, by means of a support arm (9), tilted to a transport position located perpendicular to the working position, the support arm (9) consisting of a center arm (12) and side arms (13, 14) which are pivotably mounted on the center arm (12) axes (15, 16) and have pivot bearings (17, 18), by means of which tool groups (2, 3) are connected, and on tool groups (2, 3) they are at a distance from the pivot bearing (17, 18). 18) provided stops (25) for 30 swing limitation of the tool group (2, 3) around the pivot bearing (17, 18) that are supported on the side arms (13, 14). Tillage tool according to claim 1, characterized in that the trailing rollers (28) are height-adjusted on the tool groups (2, 3) by means of a support (29) and a device (30). 35 adjustable. The cultivation tool according to claim 2, characterized in that the side arms (13, 14) have pivot bearings (17, 18) at their ends. 40 The cultivation tool according to claims 1 to 3, characterized in that the side arms (13, 14) are provided with levers (20) in the tilting direction (8) and the central arms (12) with articulated bearings (21) in which the hydraulic cylinders (22) of the side arms (13, 14) are pivotably mounted. 45 The cultivation tool according to claim 1, characterized in that the stops (25) are formed resiliently. The cultivation tool according to claim 1, characterized in that the stops (25) are designed to be adjustable for pivoting the tool groups (2, 3) around the pivoting mounts (17, 18) 50 by 0 ° to 10 °.