SPACE-OPTIMIZED DISC HARROW

Abstract

The present application relates to a soil tillage implement (10) having soil tillage tools (28), in particular disc tools, which are arranged in multiple tool rows (30.1 . . . 30.3) following one another in the working direction (A) and which are oriented transversely to the working direction (A), and having a running gear with at least one main wheel (20.1, 20.2), which is spaced apart from a centre longitudinal axis (22) transversely to the working direction (A) by a lateral wheel distance (dr). Here, the running gear is arranged with respect to the soil tillage tools (28) in such a manner that with respect to the working direction (A) in front of and to the left and right of the running gear at least one soil tillage tool (28) is arranged. All soil tillage tools (28) which are arranged in the tool row (30.1) located furthest in front of the running gear in the working direction (A) have a lateral tool distance (dw) from the centre longitudinal axis (28) that is smaller than or equal to the lateral wheel distance (dr).

Claims

1. A soil tillage implement (10) having soil tillage tools (28), in particular disc tools, which are arranged in multiple tool rows (30.1 . . . 30.3) following one another in the working direction (A) which are oriented transversely to the working direction (A), and a running gear having at least one main wheel (20.1, 20.2) which is spaced apart from a centre longitudinal axis (22) by a lateral wheel distance (dr) transversely to the working direction (A), wherein the running gear is arranged relative to the soil tillage tools (28) in such a manner that with respect to the working direction (A) at least one soil tillage tool (28) is arranged in front and to the left and right of the running gear, wherein all soil tillage tools (28) which are arranged in the tool row (30.1) located furthest in front of the running gear in the working direction (A), have a lateral tool distance (dw) from the centre longitudinal axis (22) that is smaller or equal to the lateral wheel distance (dr).

2. The soil tillage implement (10) having a centre longitudinal axis (22), soil tillage tools (28) in particular disc tools, which are arranged in multiple tool rows (30.1, 30.3) following one another in the working direction (A) and which are oriented transversely to the working direction (A), and a running gear having at least two main wheels (20.1, 20.2) spaced apart transversely to the working direction (A), wherein the running gear is arranged with respect to the soil tillage tools (28) in such a manner that with respect to the working direction (A) at least one soil tillage tool (28) is arranged in front of and to the left and right of the running gear, so that the running gear interrupts at least one of the tool rows (30.1 . . . 30.3) over a running gear width extending transversely to the working direction (A), wherein a tool row (30.1 . . . 30.3) arranged furthest in front of the running gear in the working direction (A) extends transversely to the working direction (A) over not more than the running gear width.

3. The soil tillage implement (10) according to claim 1, wherein the running gear comprises two main wheels (20.1, 20.2) which are each spaced apart from the centre longitudinal axis (22) by the same lateral wheel distance (dr).

4. The soil tillage implement (10) according to claim 1, wherein on both sides outside the centre longitudinal axis (22) the same number of soil tillage tools (28) is arranged.

5. The soil tillage implement (10) according to claim 1, wherein with respect to the working direction (A) at least one front support wheel (32.1, 32.2) each is arranged with respect to the working direction (A) to the left and right next to the tool row (30.1) located furthest in front of the running gear in the working direction (A) and in the same position as this tool row (30.1) along the working direction (A), so that the soil tillage tools (28) of this tool row (30.1) are flanked by the front support wheels (32.1, 32.2).

6. The soil tillage implement (10) according to claim 1, wherein some soil tillage tools (28) are arranged on a middle frame segment and of these two or more soil tillage tools (28) form the tool row (30.1) located furthest in front of the running gear in the working direction (A) and wherein preferably a plurality of soil tillage tools (28) each are arranged on a left lateral frame segment and a right lateral frame segment, wherein the lateral frame segments are each preferably foldable relative to the middle frame segment about a folding axis running parallel to the working direction (A), in order to switch the soil tillage implement (10) between a working position and a transport position, wherein preferably the running gear is arranged on the middle frame segment and wherein optionally support wheels (32.1, 32.2) are arranged on the lateral frame segments.

7. The soil tillage implement (10) according to claim 1, wherein the soil tillage tools (28) located laterally furthest away from the centre longitudinal axis (22) of the tool row (30.1) located furthest in front of the running gear are arranged aligned in front of the main wheels (20.1, 20.2) of the running gear in the working direction (A).

8. The soil tillage implement (10) according to claim 1, wherein the soil tillage tools (28) are arranged obliquely and are preferentially hollow discs by way of which a throwing direction each is defined, wherein the throwing direction of the soil tillage tools (28) of the rear-most tool row (30.3) points towards the centre longitudinal axis (22) and wherein the throwing directions of the soil tillage tools (28) of the tool rows (30.1, 30.2, 30.3) arranged one behind the other alternately point away from the centre longitudinal axis 22) and towards the centre longitudinal axis (22).

9. The soil tillage implement (10) according to claim 1, wherein at least one of the soil tillage tools (28), which is situated on the centre longitudinal axis (22) or directly adjacent to the same, is moved relative to the other soil tillage tools (28) of its tool row (30.1, 30.2, 30.3) to the front or rear in the working direction (A), preferentially by ⅓-times to ½-times its longitudinal extent along the working direction (A).

10. The soil tillage implement (10) according to claim 1, wherein in the working direction (A) behind the running gear a one-part or multi-part depth guiding roller is arranged.

Description

[0036] FIG. 1 shows a plan view of a soil tillage implement in a first preferred embodiment.

[0037] FIG. 2 shows a plan view of the soil tillage implement in a second preferred embodiment.

[0038] In the following description, same reference numbers are used for same or corresponding elements and a repetitive description is largely avoided.

[0039] FIG. 1 shows a plan view of a disc harrow 10 in a first preferred embodiment. The disc harrow 10 comprises a frame 14 with a middle frame segment, a left lateral frame segment and a right lateral frame segment on which a plurality of hollow discs 28 are arranged over a frame area. The directions left and right are based on a working direction A, in which the disc harrow 10 is pulled during its working operation. For this purpose, the disc harrow 10 is coupled to a tractor via a tow bar in the known manner. The lateral frame segments are movably interconnected with the middle frame segment via folding axles K1 and K2 and can be brought, preferentially via actuators, from a laterally extending working position into a vertical transport position.

[0040] In order to support the load of the disc harrow 10, a running gear is integrated in the frame 14. The running gear includes two main wheels 20.1, 20.2 that are equidistantly spaced apart the same distance to the left and right from a centre longitudinal axis 22, which have a lateral wheel distance dr from the centre longitudinal axis 22 and support the middle frame segment via an axle. Complementarily to the running gear, the disc harrow additionally includes a pair of front support wheels 32.1, 32.2. Through the hinge effect of the folding axles K1 and K2, an adaptation of the working depth of the respective frame segments to soil irregularities that occur transversely to the main working direction can take place with the help of the support wheels 32.1, 32.2 and with the help of the actuators.

[0041] The hollow discs 28 in the present embodiment are arranged in three tool rows 30.1, 30.2, 30.3, which run transversely to the working direction A and are arranged one behind the other in the working direction A. Behind the rear-most tool row 30.3, whose lateral extent defines a total working width of the disc harrow 10, depth guiding rollers are additionally provided and levelling tools or other additional tools can be additionally provided.

[0042] In the rear-most tool row 30.3, sixteen hollow discs 28 each at the same lateral tine spacing d0 from one another are arranged, wherein eight hollow discs 28 are arranged to the left of the centre longitudinal axis 22 and eight hollow discs 28 to the right of the centre longitudinal axis 22.

[0043] In the middle of the rear-most tool row 30.3 is located the running gear with its main wheels 20.1, 20.2 so that the running gear interrupts the rear-most tool row 30.3 over a running gear width extending transversely to the working direction A. In the embodiment shown in FIG. 1, the running gear width extends on both sides of the centre longitudinal axis 22 by a tool row distance dl from the centre longitudinal axis 22. In other words, the rear-most tool row 30.3 misses a plurality of hollow discs 28 that would have to be arranged in the region of the running gear width if the rear-most tool row 30.3 were continued consistently. In the embodiment shown in FIG. 1, these hollow discs 28 form the tool row 30.1 located furthest in front of the running gear in the working direction A. From a designer's view, the hollow discs 28 from the middle region of the rear-most tool row 30.3, in which the main wheels 20.1, 20.2 are located and which extends over the running gear width on both sides of the centre longitudinal axis 22 by the tool row distance dl, are positioned in front of the otherwise front-most tool row 30.2, which thus becomes the middle tool row 30.2. Thus tool rows 30.1, 30.2, 30.3 remain, wherein the rear-most tool row 30.3 with its two lateral disc arrays and the front-most tool row 30.1 with its middle disc array complement one another to form a complete tool row.

[0044] The depth guiding roller following behind the rear-most tool row 30.3 in the working direction A is mounted, like the tool rows 30.1, 30.2, 30.3 on the segments of the frame 14 and can be brought with the hollow discs 28 of the individual tool rows 30.1, 30.2, 30.3 into the vertical transport position in that the lateral frame segments are folded up about the folding axles K1, K2.

[0045] The hollow discs 28 of the tool rows 30.1, 30.2, 30.3 each define a throwing direction. The hollow discs 28 of the rear-most tool row 30.3 are aligned and arranged so that its throwing direction points to the inside towards the centre longitudinal axis 22.

[0046] In front of the rear-most tool row 30.3, the continuous middle tool row 30.2 substantially running over the entire working width is arranged. The hollow discs 28 of the middle tool row 30.2 have a throwing direction that points towards the outside away from the centre longitudinal axis 22.

[0047] Again in front of the middle tool row 30.2 the front-most tool row 30.1 is arranged, wherein the throwing direction of the hollow discs 28 of the front-most tool row 30.1 like that of the hollow discs 28 of the rear-most tool row 30.3 points to the inside towards the centre longitudinal axis 22. It is true for the hollow discs 28 of the front-most tool row 30.1 that a lateral disc distance ds of all hollow discs 28 to the centre longitudinal axis 22 is smaller or equal to the wheel distance dr. Alternatively and additionally it is possible to select the lateral extent of the front-most tool row 30.1 so that the lateral disc distance ds of all hollow discs 28 to the centre longitudinal axis 22 is smaller than the tool row distance dl, which corresponds to the distance of the hollow discs 28 of the rear-most tool row 30.3 located next to the centre longitudinal axis 22. Thus, the front-most tool row 30.1 is a part tool row which in the present embodiment extends over less than half of the full working width of the disc harrow 10.

[0048] This preferred embodiment makes possible to arrange very evenly a plurality of hollow discs 28 of a disc harrow 10 in a compact frame 14 with integrated running gear and thus a high degree of manoeuvrability, so that a highly homogeneous working pattern is created and thus a high-quality soil tillage is possible. By selecting and distributing the throwing directions of the hollow discs 28 over the tool rows 30.1 . . . 30.3, a symmetrical and even tillage of the soil is possible.

[0049] FIG. 2 shows a plan view of a soil tillage implement in a second preferred embodiment. A large part of the elements shown in FIG. 2 is equal to those of the first preferred embodiment shown in FIG. 1. This first preferred embodiment from FIG. 1 is changed according to the second preferred embodiment from FIG. 2 in that the running gear with the main wheels 20.1, 20.2 is arranged in the middle of the middle tool row 30.2 so that the running gear interrupts the middle tool row 30.2 over the running gear width extending transversely to the working direction A.

[0050] In the working direction A behind the interrupted middle tool row 30.2 the rear-most tool row 30.3 as continuous tool row 30.3 is formed. Otherwise, the features of the first embodiment from FIG. 1 are analogously realised also in the embodiment from FIG. 2.

[0051] This preferred embodiment also makes it possible to very evenly arrange a plurality of hollow discs 28 of a disc harrow 10 in a compact frame 14 with integrated running gear and thus a high degree of manoeuvrability, so that a highly homogeneous working pattern is created and thereby a higher-quality soil tillage is possible. By selecting and distributing the throwing directions of the hollow discs 28 over the tool rows 30.1 . . . 30.3, a symmetrical and even soil tillage is possible.

TABLE-US-00001 LIST OF REFERENCE NUMBERS 10 Soil tillage implement, disc harrow 12 Frame 20.1, 20.2 Main wheel 22 Centre longitudinal axis 28 Soil tillage tools 30.1 . . . 30.2 Tool rows 32.1, 32.2 Front-most support wheel A Working direction dr Wheel distance ds Disc distance d0 Tine spacing d1 Tool row distance