TOOL CHANGE SYSTEM FOR SOIL TILLAGE MACHINES

Description

[0001] The invention relates to a tool changing system for soil tillage machines according to the preamble of patent claim 1, a soil tillage tool according to the preamble of patent claim 14 and a method for assembling a soil tillage tool according to the preamble of patent claim 15.

[0002] Agricultural tillage machines, such as agricultural hoeing machines, can be equipped with a tool-changing system designed to simplify and / or accelerate the change of tillage tools used. Tillage tools used in hoeing technology include, for example, share plates, which are subject to comparatively high wear during use, necessitating regular tool changes. Furthermore, agricultural tillage machines are typically used with different tillage tools, each adapted to a specific tillage operation, a specific soil type, and / or the requirements of a specific crop.

[0003] In practice, quick-change tool systems are often used in which the tillage tool is screwed to the tool carrier. The screw head is located on the underside of the tillage tool, so that it becomes clogged with soil and plant residue during the tillage process, which often makes subsequent loosening of the screw problematic. Particularly with high workloads, for example when tilling stony soils, the fastening screws used often break, so that the tillage tool detaches from the tool carrier during the tillage process, usually unnoticed by the machine operator. In practice, there is also the problem that a screw fastening works itself loose after long periods of use, which can lead to the tillage tool jamming during the tillage process.Such misalignments often result in damage to the tillage tool. Furthermore, the required tightening forces for the corresponding screw connections can only be achieved using suitable tools, making tool-free changing of the tillage tool impossible. In practice, accessibility to the screw head located on the underside also typically poses a problem.

[0004] A corresponding tool changing system, in which the tool is secured by screws, is known, for example, from US Pat. No. 4,799,555. Further tool changing systems are disclosed in EP 1 723 841 A1, DE 23 65 914 A1, and US Pat. No. 7,255,179 B2.

[0005] The object underlying the invention is therefore to simplify and / or accelerate the change of soil cultivation tools on an agricultural soil cultivation machine.

[0006] The object is achieved by a tool changing system of the type mentioned at the outset, wherein the locking device of the tool changing system according to the invention comprises a clamping lever by means of which the engagement mechanism can be locked.

[0007] By using a clamping lever, screw or bolt fastening of the tillage tool is eliminated, meaning no change tool is required for mounting and dismounting the tillage tools. Because fastening elements such as screws or bolts are eliminated, even high workloads during tillage are not a problem, as the tool changing system does not have delicate fastening elements that are prone to breakage.

[0008] The soil cultivation tool can, for example, be a share plate. The tool changing system is designed, for example, for use with an agricultural hoe. The tool carrier preferably has an elongated basic shape. The tool carrier can be a one-piece component. For example, the tool carrier is a support stem or a support rod. The tool carrier is preferably made of metal or a metal alloy. The clamping lever preferably has an elongated basic shape. The clamping lever can be a one-piece component. The clamping lever is preferably made of metal or a metal alloy.

[0009] In a preferred embodiment of the tool changing system according to the invention, the clamping lever has a locking portion that can be inserted into a lever receiving recess of the engagement mechanism. The lever receiving recess is preferably arranged in the soil cultivation tool. By inserting the locking portion of the clamping lever into the lever receiving recess, a pre-locking of the engagement mechanism preferably occurs. To bring about a final locking state, the clamping lever is preferably also moved into a locking position, wherein moving the clamping lever into a locking position is accompanied by clamping the soil cultivation tool to the tool carrier. The lever receiving recess is preferably arranged in a rear free region of the soil cultivation tool.The lever mounting recess is accessible from the rear of the tillage tool after the tillage tool and tool carrier are engaged, allowing the clamping lever to be easily inserted from the rear and top. This allows for safe and easy installation of the tillage tool, as no assembly operations are required on the underside of the tillage tool.

[0010] In a further preferred embodiment of the tool changing system according to the invention, the soil tillage tool and the tool carrier can be clamped together by means of the clamping lever. When clamping the soil tillage tool and the tool carrier, the soil tillage tool is pushed or pulled backwards by the clamping lever. The soil tillage tool and the tool carrier can initially perform a relative movement to one another during clamping. By performing the relative movement of the soil tillage tool and the tool carrier, they are positioned relative to one another and pre-locked to one another. The clamping of the soil tillage tool and the tool carrier is preferably carried out by moving the clamping lever into a locked position after inserting the clamping lever into the lever receiving recess. To do this, the clamping lever must be pivoted upwards, for example, after inserting the clamping lever into the lever receiving recess.In the locked position, the clamping lever exerts a clamping force on the tillage tool and / or the tool carrier, by means of which the tillage tool and the tool carrier are fastened to one another.

[0011] In the unclamped state, i.e., before the clamping lever is moved into the locking position, the engagement mechanism can allow a release movement of the tillage tool and / or the tool carrier, thereby disengaging the engagement between the tillage tool and the tool carrier. The clamping force generated by the clamping lever after the clamping lever is moved into the locking position acts opposite to the release direction, so that a release movement of the tillage tool and / or the tool carrier is prevented by the clamping lever.

[0012] In a further development of the tool changing system according to the invention, the clamping lever has a tool contact area which is designed to be pressed against the contour of the lever receiving recess when the soil cultivation tool and the tool carrier are clamped together. The tool contact area is preferably located in the locking section of the clamping lever, which is inserted into the lever receiving recess of the engagement mechanism. When the clamping lever is moved into the locking position and / or in the locking position, the tool contact area of ​​the clamping lever is in contact with the contour of the lever receiving recess.

[0013] In another embodiment of the tool changing system according to the invention, the clamping lever has a carrier contact area configured to be pressed against a lever guide area of ​​the tool carrier when clamping the soil cultivation tool and the tool carrier together. When the clamping lever is moved into the locking position and / or in the locking position, the carrier contact area of ​​the clamping lever is preferably in contact with the lever guide area of ​​the tool carrier.

[0014] Furthermore, a tool changing system according to the invention is advantageous in which the carrier contact area of ​​the clamping lever has a convexly curved contact surface. The carrier contact area of ​​the clamping lever preferably has a convex rounded portion. Alternatively or additionally, the lever guide area of ​​the tool carrier can have a concavely curved contact surface. Preferably, the lever guide area of ​​the tool carrier has a concave rounded portion. The convexly curved contact surface on the clamping lever and the concavely curved contact surface on the tool carrier preferably have matching radii. The convexly curved contact surface on the clamping lever and the concavely curved contact surface on the tool carrier preferably jointly form an open plain bearing for the clamping lever. The contact surfaces in the carrier contact area and in the lever guide area can be spherical, at least in sections.

[0015] Furthermore, a tool changing system according to the invention is advantageous in which the carrier contact area and the lever guide area together form a pivot bearing for the clamping lever, which allows a guided rotational movement of the clamping lever over a pivot angle range. Executing the rotational movement of the clamping lever over the pivot angle range is preferably necessary to move the clamping lever into the locking position after insertion into the lever receiving recess.

[0016] The tool changing system according to the invention is further advantageously developed in that the clamping lever is configured to be elastically deformed when the soil cultivation tool and the tool carrier are clamped together. Preferably, the clamping lever is elastically bent when the soil cultivation tool and the tool carrier are clamped together. The clamping lever can be a spring bar, for example. Preferably, the clamping lever is elastically deformed, in particular elastically bent, when moved into the locking position.

[0017] In another preferred embodiment of the tool changing system, the locking device has a holding member designed to hold the clamping lever in a locking position in which the soil tillage tool and the tool carrier are clamped together by means of the clamping lever. The pivot bearing is preferably arranged away from the holding member, thus creating a favorable leverage ratio. By utilizing the lever effect, a comparatively high clamping force can be generated that clamps the soil tillage tool and the tool carrier together using a comparatively low actuating force. In this way, a robust clamping lock of the soil tillage tool and the tool carrier can be implemented despite the omission of a separate assembly tool.

[0018] The clamping lever can therefore be moved into the locked position either by hand or with an additional tool. The retaining link prevents the clamped clamping lever from snapping back. The retaining link can be a ring-shaped body, for example. The tool carrier can have a support for the retaining link, which prevents the retaining link from falling down uncontrollably if the retaining link is not secured by the clamping lever. The retaining link can also be a linch pin. The retaining link can be moved into an auxiliary assembly position in which the clamping lever is removably attached to the retaining link so that the clamping lever does not get lost when changing the soil cultivation tool. In the auxiliary assembly position, the clamping lever can hang loosely from the retaining link.

[0019] In the tool changing system according to the invention, the clamping lever is configured to be elastically deformed in the locking position, preferably extending along a curved edge of the tool carrier in the locking position. The curved edge of the tool carrier, along which the clamping lever extends in the locking position, is preferably convex and / or a rear end edge of the tool carrier.

[0020] To prevent material such as soil and / or plant residue from accumulating between the clamping lever and the tool carrier, which could prevent the clamping connection from being released intentionally, the space between the curved edge of the tool carrier and the clamping lever can be filled with an elastically deformable material when the clamping lever is in the locked position. The elastically deformable material can be attached, for example, to the curved edge of the tool carrier and / or to the clamping lever, e.g., glued. The elastically deformable material can be, for example, foam rubber. The elastically deformable material merely fills the gap elastically, but does not perform any closing and / or locking function.The elastically deformable material is located in an area protected from the earth current, preventing the elastically deformable material from detaching from the clamping lever and / or the tool carrier due to the earth current. The elastic deformability of the material also allows for reliable and easy clamping and releasing of the clamping lever.

[0021] The tool changing system according to the invention is further advantageously developed in that the engagement mechanism has one or more engagement bodies, wherein each engagement body is configured to engage in a receiving recess of the engagement mechanism. The one or more engagement bodies are preferably located on the underside of the tool carrier. The one or more engagement bodies are preferably integral components of the tool carrier. The one or more receiving recesses are preferably located in the soil tillage tool. The one or more engagement bodies preferably protrude only slightly from the one or more receiving recesses, such that the one or more engagement bodies are protected from wear due to contact with the earth current. Furthermore, plate-shaped soil tillage tools can have different material thicknesses.By locking the tool with one or more engagement elements, the compatibility of the tillage tool and the tool carrier is independent of the material thickness of the tillage tool. This results in a universal and flexibly applicable engagement mechanism that is independent of the plate thickness of a plate-shaped tillage tool.

[0022] In a further preferred embodiment of the tool changing system according to the invention, an engagement body of the engagement mechanism is configured to engage the lever-receiving recess, into which the locking portion of the clamping lever can also be inserted. The lever-receiving recess thus accommodates both an engagement body and the locking portion of the clamping lever. The lever-receiving recess thus serves to establish an engagement state between the soil cultivation tool and the tool carrier and to clamp the soil cultivation tool and tool carrier to one another.

[0023] In another preferred embodiment of the tool changing system according to the invention, the one or more engagement bodies have a contact surface that is configured to be pressed against a contact section of the inner contour of a receiving recess when the soil cultivation tool and the tool carrier are clamped together. The inner contour of the receiving recess thus serves as a counterbearing when the soil cultivation tool and the tool carrier are clamped together by means of the clamping lever.

[0024] In another preferred embodiment of the tool changing system according to the invention, the contact surface of the one or more engagement bodies and the contact section of the inner contour of the one or more receiving recesses have corresponding chamfers. The chamfers wedge the soil tillage tool and the tool carrier into one another when clamped by means of the clamping lever. A virtually play-free fit of the soil tillage tool on the tool carrier is achieved. The clamping lever ensures that the play-free fit is maintained during a tillage operation, so that the soil tillage tool cannot tilt and / or twist even under the influence of soil tillage forces. The engagement bodies preferably have matching or differing chamfer angles.

[0025] Preferably, the inner contours of the receiving recesses have identical or different chamfer angles. The chamfer angle at the chamfers of the engagement bodies and the chamfer angle at the chamfers of the inner contours of the receiving recesses preferably ranges between 30 degrees and 60 degrees, for example, 45 degrees.

[0026] The tool carrier may also have markings for adjusting the position of the tillage tool and / or the working depth. These markings may form a scale for adjusting the height. These markings eliminate the need for a grid in the edge area of ​​the tool carrier.

[0027] In a further preferred embodiment of the tool changing system according to the invention, the clamping lever is designed as a bent wire part. In particular, the clamping lever is designed as a spring clip. In this embodiment, the clamping lever can be U-shaped, so that two open ends of the bent wire part are directly opposite one another and / or a loop is formed at the closed end of the bent wire part. The contour of the clamping lever can be mirror-symmetrical, so that it is formed by two wire ends running symmetrically, in particular directly next to one another. As a result of this embodiment, the clamping lever has an open shape, so that the risk of adhering soil material and entangled plant residue is particularly reduced.In this embodiment, the tool carrier can have, particularly on its rear side, a preferably hook-shaped retaining member configured to hold the clamping lever in a locked position in which the soil cultivation tool and the tool carrier are clamped together by means of the clamping lever. The clamping lever can engage behind the retaining member in the locked position, particularly by means of the loop at its closed end.

[0028] The object underlying the invention is further achieved according to the subject matter of claim 14 by a soil tillage tool for a tool changing system. The tool changing system can be designed according to one of the preceding embodiments. It is provided that the soil tillage tool is configured to be moved through soil. The soil tillage tool has at least one receiving recess by means of which the soil tillage tool is configured to form an engagement mechanism with a tool carrier, so that the soil tillage tool can be arranged on the tool carrier. According to the invention, the soil tillage tool has a lever receiving recess into which a clamping lever can be inserted. The lever receiving recess can accommodate a locking portion of a clamping lever.With regard to the advantages and modifications of the soil cultivation tool, reference is first made to the advantages and modifications of the above embodiments of the tool change system. The soil cultivation tool can be further developed by features relating to the soil cultivation tool and which were explained in connection with the above embodiments of the tool change system.

[0029] The object underlying the invention is further achieved by a method of the type mentioned above according to the subject matter of claim 15, wherein the engagement mechanism is locked within the scope of the method according to the invention by means of a clamping lever of a locking device of the tool changing system. The method according to the invention is preferably carried out using a tool changing system according to one of the embodiments described above, so that with regard to the advantages and modifications of the method according to the invention, reference is made to the advantages and modifications of the tool changing system according to the invention.

[0030] Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. Fig. 1 shows an embodiment of the tool changing system according to the invention in a pre-locked state; Fig. 2 shows theFig. 1 shown tool change system in a locked state; Fig. 3 the engagement mechanism of the Fig. 1 illustrated tool changing system in a sectional view; Fig. 4 another embodiment of the tool changing system according to the invention before inserting the clamping lever; Fig. 5 the Fig. 4 illustrated tool change system in a pre-locked state after inserting the clamping lever in a perspective view; Fig. 6 the Fig. 4 illustrated tool change system when moving the clamping lever into the locking position in a side view; Fig. 7 the Fig. 4 illustrated tool changing system when inserting the clamping lever into the holding member; Fig. 8 shows a further embodiment of the tool changing system according to the invention when moving the clamping lever into the locking position in a side view; Fig. 9 shows a further embodiment of the tool changing system according to the invention in a pre-locked state after inserting the clamping lever in a perspective view; Fig. 10 the Fig. 9 shown tool change system when moving the clamping lever into the locking position in a side view; and Fig. 11 the Fig. 9 The tool change system shown when moving the clamping lever into the locking position using an assembly tool.

[0031] The Fig. 1 shows a tool changing system 10 for an agricultural soil cultivating machine. The tool changing system 10 comprises a soil cultivating tool 12, which engages a tool carrier 14. The soil cultivating tool 12 can, for example, be a coulter plate, which is moved through the soil at a shallow depth during soil cultivation. The soil cultivating tool 12 has a V-shaped plate and is designed as a one-piece metal body. The tool carrier 14 has an elongated basic shape and is designed as a one-piece metal support rod.

[0032] The soil tillage tool 12 and the tool carrier 14 can be clamped together by means of a clamping lever 18.

[0033] The Fig. 1 shows the tool changing system 10 in a pre-locked state in which the clamping lever 18 has already been inserted into a lever receiving recess (concealed) of an engagement mechanism.

[0034] To clamp the soil tillage tool 12 and the tool carrier 14 and to lock the engagement mechanism, the clamping lever 18 must be brought into the vicinity of the rear outer edge 16b of the tool carrier 14.

[0035] The Fig. 2 shows the locked state, in which the clamping lever 18 is in a locking position and extends along a convexly curved rear end edge 16b of the tool carrier 14. The clamping lever 18 can be moved into the locking position manually and without the use of a tool. The tool changing system 10 has a holding member 20, which holds the clamping lever 18 in the locking position and prevents the clamped clamping lever 18 from snapping back. The holding member 20 is an annular body, which rests in a front region on a support 22 of the tool carrier 14. The support 22 is located on the front edge 16a of the tool carrier 14. The clamping lever 18 has a contour 24 in an upper end region. The contour 24 consists of an indentation formed by two spaced-apart material webs.The indentation of the contour 24 can be engaged with the holding member 20 to secure the clamping lever 18 in the locking position. If the holding member 20 is not fixed by the clamping lever 18, the support 22 prevents the holding member 20 from falling down in an uncontrolled manner. In the locking position shown, the clamping lever 18 is elastically deformed.

[0036] The Fig. 3 shows the locking device 26 and the engagement mechanism 28 in detail. The engagement mechanism 28 is formed by the soil cultivation tool 12 and the tool carrier 14. The engagement mechanism 28 enables the soil cultivation tool 12 and the tool carrier 14 to be releasably engaged with one another in a non-destructive manner. For this purpose, the engagement mechanism 28 has two engagement bodies 32a, 32b, each engagement body 32a, 32b being configured to engage in a receiving recess 30a, 30b of the engagement mechanism 28. The engagement bodies 32a, 32b are located on the underside of the tool carrier 14 and are integral components of the tool carrier 14. The two receiving recesses 30a, 30b are located in the soil cultivation tool 12.After inserting the engagement bodies 32a, 32b into the receiving recesses 30a, 30b, the engagement bodies 32a, 32b protrude only slightly from the receiving recesses 30a, 30b, thus protecting the engagement bodies 32a, 32b from wear. The engagement bodies 32a, 32b each have a chamfered contact surface, which is pressed against chamfered inner contours of the receiving recesses 30a, 30b by the clamping lever 18. The chamfers of the engagement bodies 32a, 32b and the inner contours of the receiving recesses 30a, 30b ensure that the soil tillage tool 12 and the tool carrier 14 are wedged into one another when they are clamped together by means of the clamping lever 18. The chamfer angles α, β of the chamfers of the engagement bodies 32a, 32b and the inner contours of the receiving recesses 30a, 30b correspond and are 45 degrees in the illustrated embodiment.

[0037] The clamping lever 18 is part of a locking device 26, by means of which the engagement mechanism can be locked. The clamping lever 18 has a locking portion 34, which can be inserted into the receiving recess 30b of the engagement mechanism 28. The receiving recess 30b can thus also be referred to as a lever receiving recess 30b.

[0038] The Fig. 4 bis 7 show the steps required to assemble a soil tillage tool 12. As shown in the Fig. 4 As indicated, the soil tillage tool 12 must first be brought into engagement with the tool carrier 14. For this purpose, the soil tillage tool 12 is first brought in the vertical direction z into abutment with the lower edge of the tool carrier 14. During the vertical movement, the soil tillage tool 12 is positioned such that the engagement bodies 32a, 32b of the tool carrier 14 are inserted into the receiving recesses 30a, 30b of the soil tillage tool 12. The soil tillage tool 12 must then be moved rearward in the horizontal direction x so that the engagement bodies 32a, 32b engage with the receiving recesses 30a, 30b. The horizontal movement of the soil tillage tool 12 makes a free area of ​​the receiving recess 30b accessible so that the locking section 34 of the clamping lever 18 can be inserted into the receiving recess 30b.The receiving recess 30b is accessible from the rear of the soil tillage tool 12 after the soil tillage tool 12 and tool carrier 14 have been brought into engagement, so that the clamping lever 18 can be inserted into the receiving recess 30b from the rear and above.

[0039] To complete the locking process, the clamping lever 18 must be moved into a locking position after being inserted into the lever receiving recess 30b.

[0040] The Fig. 5 shows the clamping lever 18 during pivoting into the locking position, wherein the soil tillage tool 12 and the tool carrier 14 are clamped together by means of the clamping lever 18 during the pivoting of the clamping lever 18. When the soil tillage tool 12 and the tool carrier 14 are clamped together, the soil tillage tool 12 is pushed backward by the clamping lever 18. The soil tillage tool 12 and the tool carrier 14 can initially perform a relative movement to one another in an initial phase of the clamping. After the relative movement has ended, a clamping force is built up via the clamping lever 18, via which the soil tillage tool 12 and the tool carrier 14 are fastened to one another. The clamping lever 18 has a tool contact area which is pressed against the contour of the lever receiving recess 30b when the soil tillage tool 12 and the tool carrier 14 are clamped together.The tool contact area is located in the locking section 34 of the clamping lever 18. When the clamping lever 18 is moved into the locking position, the tool contact area of ​​the clamping lever 18 is in contact with the contour of the lever receiving recess 30b.

[0041] Furthermore, the clamping lever 18 has a carrier contact area which, when the soil cultivation tool 12 and the tool carrier 14 are clamped together, is pressed against a lever guide area of ​​the tool carrier. When the clamping lever 18 is moved into the locking position, the carrier contact area of ​​the clamping lever 18 is in contact with the lever guide area of ​​the tool carrier 14. The carrier contact area of ​​the clamping lever 18 has a convexly curved contact surface 36. The lever guide area of ​​the tool carrier 14 has a concavely curved contact surface 38. The convexly curved contact surface 36 on the clamping lever 18 and the concavely curved contact surface 38 on the tool carrier 14 together form a sliding bearing or pivot bearing 40. The pivot bearing 40 allows a guided rotary movement of the clamping lever 18 in the pivoting direction γ.

[0042] The Fig. 6 shows that the clamping lever 18 is elastically deformed, namely elastically bent, in a deformation region 42 when the soil cultivation tool 12 and the tool carrier 14 are clamped together. The clamping lever 18 can therefore also be referred to as a spring bar.

[0043] As the Fig. 7 shows, the clamping lever 18 can be moved into the locking position and secured to the holding member 20 manually using one or more fingers F. After the contouring 24 has been inserted into the annular holding member 20, the clamping lever 18 extends along the rear curved edge 16b of the tool carrier 14. The curved edge profile of the tool carrier 14 belongs to a rear end edge 16b of the tool carrier 14.

[0044] As the Fig. 8 As shown, elastically deformable material 46, for example, foam rubber, can be arranged on the side of the clamping lever 18 facing the tool carrier 14. By means of the elastically deformable material 46, the remaining gap between the rear edge 16b of the tool carrier 14 and the clamping lever 18 can be closed, so that no dirt can accumulate in this area. Furthermore, markings 44 are provided on the tool carrier 14 for adjusting the position of the soil cultivation tool 12 and for adjusting the working depth. The markings 44 form a scale for adjusting the height of the soil cultivation tool 12.

[0045] The Fig. 9 shows the clamping lever 18, which in this embodiment is designed as a bent wire part, during pivoting into the locking position, wherein the soil tillage tool 12 and the tool carrier 14 are clamped together by means of the clamping lever 18 during pivoting of the clamping lever 18. When the soil tillage tool 12 and the tool carrier 14 are clamped, the soil tillage tool 12 is pushed backward by the clamping lever 18. In an initial phase of the clamping, the soil tillage tool 12 and the tool carrier 14 can initially perform a relative movement to one another. After the relative movement has ended, a clamping force is built up via the clamping lever 18, via which clamping force the soil tillage tool 12 and the tool carrier 14 are fastened to one another.The clamping lever 18 has a tool contact area, which is pressed against the contour of the lever receiving recess 30b when the soil cultivation tool 12 and the tool carrier 14 are clamped together. The tool contact area is located in the locking section 34 of the clamping lever 18. When the clamping lever 18 is moved into the locking position, the tool contact area of ​​the clamping lever 18 is in contact with the contour of the lever receiving recess 30b.

[0046] Furthermore, the clamping lever 18 has a carrier contact area which, when the soil cultivation tool 12 and the tool carrier 14 are clamped together, is pressed against a lever guide area of ​​the tool carrier 14. When the clamping lever 18 is moved into the locking position, the carrier contact area of ​​the clamping lever 18 is in contact with the lever guide area of ​​the tool carrier 14. The carrier contact area of ​​the clamping lever 18 has a convexly curved contact surface 36. The lever guide area of ​​the tool carrier 14 has a concavely curved contact surface 38. The convexly curved contact surface 36 on the clamping lever 18 and the concavely curved contact surface 38 on the tool carrier 14 together form a sliding bearing or pivot bearing 40. The pivot bearing 40 allows a guided rotary movement of the clamping lever 18 in the pivoting direction γ.

[0047] The clamping lever 18, designed as a bent wire part, can also be referred to as a spring clip. The clamping lever 18 is essentially U-shaped, with the two open ends forming the locking section 34 of the clamping lever 18. At the closed end of the clamping lever 18, a loop is thus formed, which can serve as a contour 24. By pressing the clamping lever 18 in the pivoting direction γ, the contour 24 can engage behind the holding member 20 designed as a hook on the tool carrier 14. The clamping lever 18 is held in its locked position by the hook-shaped holding member 20 as soon as the loop-shaped contour 24 engages behind it. The clamping lever 18 has a mirror-symmetrical contour, which gives it its open shape.

[0048] The Fig. 10 shows that the clamping lever 18 is elastically deformed, namely elastically bent, in a deformation region 42 when the soil cultivation tool 12 and the tool carrier 14 are clamped together. The clamping lever 18 can therefore also be referred to as a spring clip. Moving the clamping lever 18 into the locking position and securing the clamping lever 18 to the holding member 20 can be done manually.

[0049] Alternatively, a Fig. 11 The assembly tool shown can be used. The assembly tool can be applied from the side to the front of the tool carrier 14 and to the underside of the clamping lever 18. It has a lateral opening for this purpose. The clamping lever 18 can then be moved upwards into its locking position by levering the assembly tool, in which the contour 24 engages behind the holding member 20. The assembly tool can also be used to release the locking position. Bezugszeichen

[0050] 10Tool changing system 12Soil tillage tool 14Tool carrier 16a, 16bEdges 18Clamping lever 20Holding link 22Support 24Contouring 26Locking device 28Engaging mechanism 30a, 30bReceiving recesses 32a, 32bEngaging body 34Locking section 36Contact surface 38Contact surface 40Pivot bearing 42Deformation area 44Markings 46Elastic material α, β Chamfer angle γ Swivel direction x, z Insertion directions FFinger

Claims

1. Tool change system (10) for agricultural soil-cultivating machines, comprising - a soil-cultivating tool (12) which is designed to be moved through soil for soil cultivation; - a tool carrier (14) on which the soil-cultivating tool (12) is arranged, and - a locking device (26); the soil-cultivating tool (12) and the tool carrier (14) jointly forming an engagement mechanism (28), via which the soil-cultivating tool (12) and the tool carrier (14) can be brought into engagement with one another so as to be detachable in a non-destructive manner; characterized in that the locking device (26) comprises a clamping lever (18) by means of which the engagement mechanism (28) can be locked, the clamping lever (18) being designed to be elastically deformed when the soil-cultivating tool (12) and the tool carrier (14) are clamped to one another.

2. Tool change system (10) according to claim 1, characterized in that the clamping lever (18) has a locking portion (34) which can be inserted into a lever receiving recess (30b) of the engagement mechanism (28), the lever receiving recess (30b) preferably being arranged in the soil-cultivating tool (12).

3. Tool change system (10) according to claim 1 or 2, characterized in that the soil-cultivating tool (12) and the tool carrier (14) can be clamped to one another by means of the clamping lever (18).

4. Tool change system (10) according to claim 2 and 3, characterized in that the clamping lever (18) has a tool contact region which is designed to be pressed against the contour of the lever receiving recess (30b) when the soil-cultivating tool (12) and the tool carrier (14) are clamped to one another.

5. Tool change system (10) according to claim 3 or 4, characterized in that the clamping lever (18) has a carrier contact region which is designed to be pressed against a lever guide region of the tool carrier (14) when the soil-cultivating tool (12) and the tool carrier (14) are clamped to one another.

6. Tool change system (10) according to claim 5, characterized in that - the carrier contact region of the clamping lever (18) has a convex contact surface (36); and / or - the lever guide region of the tool carrier (14) has a concave contact surface (38).

7. Tool change system (10) according to claim 5 or 6, characterized in that the carrier contact region and the lever guide region jointly form a rotary bearing (40) for the clamping lever (18), which allows a guided rotational movement of the clamping lever (18) over a pivoting angle range.

8. Tool change system (10) according to any of the preceding claims, characterized in that the locking device (26) has a holding member (20) which is designed to hold the clamping lever (18) in a locking position in which the soil-cultivating tool (12) and the tool carrier (14) are clamped to one another by means of the clamping lever (18).

9. Tool change system (10) according to any of the preceding claims, characterized in that the engagement mechanism (28) has one or more engagement bodies (32a, 32b), each engagement body (32a, 32b) being designed to engage with a receiving recess (30a, 30b) of the engagement mechanism (28).

10. Tool change system (10) according to claim 9, characterized in that an engagement body (32a, 32b) of the engagement mechanism (28) is designed to engage in the lever receiving recess (30b), into which the locking portion (34) of the clamping lever (18) can also be inserted.

11. Tool change system (10) according to claim 9 or 10, characterized in that the one or more engagement bodies (32a, 32b) have a contact surface, which contact surfaces are designed to each be pressed against a contact portion of the inner contour of a receiving recess (30a, 30b) when the soil-cultivating tool (12) and the tool carrier (14) are clamped.

12. Tool change system (10) according to claim 11, characterized in that the contact surface of the one or more engagement bodies (32a, 32b) and the contact portion of the inner contour of the one or more receiving recesses (30a, 30b) have corresponding bevels.

13. Tool change system (10) according to at least one of the preceding claims, characterized in that the clamping lever (18) is in the form of a bent wire part, in particular a spring clip.

14. Soil-cultivating tool (12) for a tool change system (10), in particular according to any of claims 1 to 13, which is designed to be moved through soil for soil cultivation, the soil-cultivating tool (12) having at least one receiving recess (30a, 30b), by means of which the soil-cultivating tool is designed to form an engagement mechanism (28) with a tool carrier (14) in order to be arranged on the tool carrier (14), characterized by a lever receiving recess (30b) into which a clamping lever (18) can be replaced, the clamping lever (18) being designed to be elastically deformed when the soil-cultivating tool (12) and the tool carrier (14) are clamped to one another.

15. Method for mounting a soil-cultivating tool (12) on a soil-cultivating machine using a tool change system (10), in particular a tool change system (10) according to any of the preceding claims, comprising the step of: - bringing a soil-cultivating tool (12) and a tool carrier (14) into engagement with one another so as to be detachable in a non-destructive manner, by means of an engagement mechanism (28) which is formed jointly by the soil-cultivating tool (12) and the tool carrier (14); characterized by the step of: - locking the engagement mechanism (28) by means of a clamping lever (18) of a locking device (26) of the tool change system (10), the clamping lever (18) being designed to be elastically deformed when the soil-cultivating tool (12) and the tool carrier (14) are clamped to one another.