Excavator rake

Abstract

The invention relates to a rake (1) for attaching to an excavator, comprising a plurality of tines (3) fastened to a tine carrier (2), and comprising a receptacle (4) by means of which the rake (1) can be detachably fastened to the excavator, in particular a quick-change device of the excavator. In order to achieve particularly high stability, the invention proposes that the tines (3) have a recess (18), in particular an opening (5), corresponding to the tine carrier (2) and are connected to the tine carrier (2) in a form-fitting manner via the recess (18).

Description

[0001] excavator rake

[0002] The invention relates to a rake for attachment to an excavator, comprising several tines attached to a tine carrier and a receptacle with which the rake can be detachably attached to the excavator, in particular to a quick-change device of the excavator.

[0003] Excavator rakes of the type mentioned above are known from the prior art, particularly for carrying out topsoil spreading operations with an excavator. In particular, document CN 113615337 A discloses an excavator rake which can be used especially for topsoil spreading activities.

[0004] However, it has been shown that despite the use of a stabilizing bolt in this excavator rake, which connects the individual tines to the tine carrier at a distance, only insufficient stability is achieved and damage occurs due to deformation of the tines.

[0005] This is where the invention comes in. The object of the invention is to provide a rake of the type mentioned above which exhibits particularly high stability.

[0006] This problem is solved according to the invention by a rake of the type mentioned at the outset, in which the tines have a recess corresponding to the tine carrier, in particular an opening, and are positively connected to the tine carrier via the recess.

[0007] Within the scope of the invention, it was recognized that improved stability can be achieved through such a positive-locking connection of the tines with the tine carrier, since in particular a rotation of the tines about a longitudinal axis of the tine carrier, which rotation is caused by a moment acting on the tines, can be avoided, or the tines can be stably supported on the tine carrier via the positive locking.

[0008] The tines can have a recess open on one side to form a positive fit with the tine carrier, into which the tine carrier is inserted laterally. For example, the recess can be formed by three surfaces that correspond to the outer contour of a tine carrier formed by a square tube.

[0009] Particularly high stability can be achieved, however, if the tines completely encircle the tine holder. The recess is then designed as a through-hole or opening in the tine, which, for example, has a square cross-section. In this way, forces are distributed particularly well within the tine, resulting in reduced mechanical stresses and thus minimizing deformation even under heavy loads and after prolonged use.

[0010] It is advantageous if the tines are connected to the tine holder in a rotationally fixed manner by means of a positive locking mechanism. This positive locking mechanism, which can be formed, for example, by a tine holder with a non-circular cross-section, particularly a square cross-section, and tines with a corresponding recess, thus prevents the tines from rotating around a longitudinal axis of the tine holder.

[0011] In addition to the positive locking mechanism, it is preferably provided that the tines are welded to the tine carrier. This achieves particularly high stability.

[0012] A simple manufacturing process and a stable construction are achieved when the tine carrier is designed as a shaped tube, particularly a square tube. It is understood that the tine recess preferably has a contour that corresponds to an outer contour of the tine carrier; in the case of a tine carrier formed by a square tube, this would be a recess with a square cross-section.

[0013] It is advantageous if the mount has two quick-change side plates connected to the tine carrier, which have pre-drilled holes. This allows for particularly simple manufacturing of the mount. Bolts can be positioned and fixed in these holes, for example by welding, to connect the mount to a quick-change device.

[0014] It has proven advantageous that the mounting is designed for coupling to a Martin quick-change device. This allows the rake to be coupled stably and with good power transmission to the Martin quick-change device, which is particularly common on excavators.

[0015] Alternatively or additionally, the mount can also be designed for coupling to a Lehnhoff quick-change device, which is also very common.

[0016] To make the rake easy to handle even without an excavator, it is preferably intended that the holder has hooks at the ends.

[0017] It is advantageous if the mount has plate-shaped elements that are processed by laser cutting, in particular a recess for a positive-locking connection with the tine carrier being formed by laser cutting. Laser cutting allows even complex contours, which are advantageous and / or necessary, for example, for coupling to a quick-change device, to be formed easily and with high precision.

[0018] It is advantageous if a raised section is provided that can be securely and detachably connected to the rake. This allows large quantities of soil to be handled in one go, particularly when spreading topsoil, without soil spilling over the edge of the rake.

[0019] Preferably, the extension can be positively connected to the tine carrier, in particular by means of a locking bolt connected to the extension, which can be inserted into a corresponding locking bore in the tine carrier and locked by means of a cotter pin.

[0020] In this way, the extension can be easily and stably connected to the tine carrier.

[0021] It is advantageous if the raised section can be positively connected to the receptacle, in particular by means of a slot in the receptacle that corresponds to the dimensions of the raised section. The raised section can, in particular, have a raised element that is plate-shaped and can be inserted into a slot-shaped raised recess in the receptacle.

[0022] Particularly high stability can be achieved if the elevation can be inserted in a first direction into the receptacle and along a second direction into the tine carrier in order to be positively connected on the one hand to the receptacle and on the other hand to the tine carrier, wherein the first direction and the second direction are in particular arranged perpendicular to each other.

[0023] It is advantageous if the elevation has two elevation elements which can be connected symmetrically to a central plane of the rake, wherein the elevation elements are in particular plate-shaped.

[0024] In this way, it is possible to move larger quantities of earth with the rake on both sides of a central plane, to which the rake is preferably symmetrical. Preferably, the mounting point for coupling the rake to an excavator is located in the area of ​​the central plane.

[0025] To make it particularly easy to adapt the rake to different operating conditions, it is advantageous if at least one, preferably two, lateral extension elements are provided, each featuring an extension tine carrier with tines and detachable from the rake. In this way, the rake can be used without the extension element, for example, for narrow beds, and with the extension element(s) for larger areas.

[0026] Preferably, the tine carrier is detachably connectable to the extension element via a connecting element that can be inserted into the tine carrier, wherein the connecting element is preferably connected to the extension tine carrier, in particular welded to the extension tine carrier.

[0027] It is particularly advantageous if the extension tine carrier and the tine carrier have identical outer cross-sections. The tines can then also be identically designed, resulting in a high degree of uniformity. The connecting element can, for example, be a smaller cross-section tube that can be inserted into the tubular form that serves as both the tine carrier and the extension tine carrier, or it can be a plate-shaped connecting element that can be inserted into the tine carrier.

[0028] It is particularly preferred that the extension element and the tine carrier have a corresponding recess, in particular a locking bore, into which a locking element can be inserted when the extension element is connected to the tine carrier, in order to lock the connection between the extension element and the tine carrier. In this way, the extension element can be easily, yet detachably and securely connected to the rake.

[0029] The lateral extension can be particularly well combined with a riser if the locking element is a locking bolt of a riser that is detachably connected to the tine carrier. In this case, the recess can be a bore that penetrates both the tine carrier and the extension element.

[0030] The tines are usually made of a metal. Preferably, the tines are made of wear-resistant steel, in particular a steel available under the trade name HARDOX.

[0031] A particularly simple and precise manufacturing process for the prongs is possible if the prongs are formed from a sheet-shaped metal by laser cutting.

[0032] In an excavator with a rake detachably attached to a quick-change device, it is preferably provided that the rake is designed according to the invention. This achieves particularly high stability on the one hand and, optionally in conjunction with the detachably attachable extension and the extension, improved flexibility with regard to a possible application. Further features, advantages, and effects of the invention will become apparent from the exemplary embodiment shown below. The drawings, to which reference is made, show:

[0033] Figs. 1 to 3 show a rake in different views;

[0034] Figs. 4 and 5 show a raised platform for a rake;

[0035] Fig. 6 shows a detail of a photograph;

[0036] Fig. 7 an extension;

[0037] Figs. 8 and 9 show a rake with extension and height;

[0038] Fig. 10 shows another photograph.

[0039] Figures 1 to 3 show a rake 1 in different views. As can be seen, the rake 1 has a tine carrier 2 formed by a square tube, with tines 3 arranged regularly along a longitudinal axis 20. The tines 3 are made of a particularly wear-resistant steel, preferably HARDOX, and have a recess 18 formed here by an opening 5, which corresponds to an outer contour of the tine carrier 2. By means of the recess 18, the tines 3 are thus positively engaged with the tine carrier 2 and thereby secured against rotation about the longitudinal axis 20 of the tine carrier 2. In this way, deformation is easily prevented.

[0040] As can be seen, the tines 3 completely encircle the tine carrier 2. Furthermore, the tines 3 are also welded to the tine carrier 2, resulting in a particularly stable construction.

[0041] In order to easily connect the rake 1 to an excavator, a mounting 4 is provided which can be coupled, for example, with a so-called Martin quick-change device of an excavator and has two quick-change side parts 6.

[0042] As can be seen in Fig. 2, the quick-change side parts 6 of the mount 4 are connected by bolts 10 and have end hooks 8, so that the rake 1 can also be handled without being attached to an excavator. Fig. 3 shows a top view of the rake 1. Different lengths of the rake 1 with different distances between the tines 3 are of course possible.

[0043] Fig. 4 shows a raised section 9, which has two raised sections that can be positively connected to the tine carrier 2 and the receptacle 4. The raised section 9, which is also shown in an isometric view in Fig. 5, has plate-shaped raised sections 13, each of which is connected to a locking bolt 16. The locking bolt 16 has a bore so that it can be secured by means of a cotter pin 11. To fix the raised section 9 to the tine carrier 2 and the receptacle 4, the tine carrier 2 preferably has a locking bore 17 corresponding to the locking bolt 16, and the receptacle 4 has a slot 12 corresponding to the raised sections 13, so that a positive connection between the raised section and the tine carrier 2 or the receptacle 4 can be easily established.

[0044] Fig. 6 shows a quick-change side part 6 of a corresponding receptacle 4 in detail, with the slot 12 clearly visible, into which the plate-shaped extension element 13 can be positively inserted. This quick-change side part 6 also has bores 7 in which bolts 10 can be arranged to connect two quick-change side parts 6 of a receptacle 4.

[0045] Fig. 7 shows two extension elements 14, by which the effective width of the rake 1 can be easily changed. Each extension element 14 has an extension tine carrier 15 with tines 3 connected to it by a positive fit and a welded connection. A connecting element 19 formed by metal plates is arranged in the extension tine carrier 15, via which the extension tine carriers 15 can be connected to the tine carrier 2. A connection can be made by inserting the extension element 14 into the tine carrier 2 and fixing it in place by means of the locking bolt 16. For this purpose, locking bores 17 are provided in the connecting elements 19. Fig. 8 shows the rake 1, with both the extension 9 and the extension elements 14 connected to the tine carrier 2. Fig. 9 shows a corresponding rake 1 in an isometric view. As can be seen particularly in Fig.As can be clearly seen in Figure 8, the locking bolts 16 of the extension 9 protrude through the tine carrier 2 and the connecting elements 19 of the extension elements 14, so that the locking bolts 16 fix the extension elements 14 to the tine carrier 2, especially since both the extension elements 14 and the tine carrier 2 have locking bores 17 which correspond to the bolts 10. The bolts 10, which penetrate the connecting elements 19 and the tine carrier 2, thus create a positive-locking connection between the lateral extension elements 14 and the tine carrier 2. To fix the extension 9 by means of the locking bolts 16, the locking bolts 16 are preferably secured by means of a cotter pin 11.

[0046] Fig. 10 shows another mounting 4, which, unlike the mounting 4 shown in Figs. 1 to 9, does not have two bolts 10, but rather one bolt 10 and a plate-shaped element for coupling to a quick-change mounting. This mounting 4 is suitable for coupling to a Lehnhoff-type quick-change device.

[0047] With a rake 1 according to the invention, it is possible to efficiently process large areas with an excavator, in particular to spread humus, the rake 1 being easily adaptable to different requirements by the possibility of detachably attaching a height 9 and an extension.

Claims

Patent claims 1. Rake (1) for attachment to an excavator, comprising several tines (3) attached to a tine carrier (2) and a receptacle (4) with which the rake (1) can be detachably attached to the excavator, in particular to a quick-change device of the excavator, characterized in that the tines (3) have a recess (18) corresponding to the tine carrier (2), in particular an opening (5), and are positively connected to the tine carrier (2) via the recess (18).

2. Rake (1) according to claim 1 , characterized in that the tines (3) completely encircle the tine carrier (2).

3. Rake (1) according to claim 1 or 2, characterized in that the tines (3) are connected to the tine carrier (2) in a rotationally fixed manner by means of the positive locking.

4. Rake (1) according to claim 1 or 3, characterized in that the tines (3) are welded to the tine carrier (2).

5. Rake (1) according to one of claims 1 to 4, characterized in that the tine carrier (2) is designed as a shaped tube, in particular as a square tube.

6. Rake (1) according to one of claims 1 to 5, characterized in that the receptacle (4) has two quick-change side parts (6) connected to the tine carrier (2), which have bores (7).

7. Rake (1) according to one of claims 1 to 6, characterized in that the receptacle (4) is designed for coupling to a Martin quick-change device.

8. Rake (1) according to one of claims 1 to 7, characterized in that the receptacle (4) is designed for coupling to a Lehnhoff quick-change device.

9. Rake (1) according to one of claims 1 to 8, characterized in that the receptacle (4) has end hooks (8).

10. Rake (1) according to one of claims 1 to 9, characterized in that the receptacle (4) has plate-shaped elements which are processed by laser cutting, wherein in particular a recess (18) for positive locking connection with the tine carrier (2) is formed by laser cutting.

11. Rake (1) according to one of claims 1 to 10, characterized in that a raised section (9) is provided which can be positively and detachably connected to the rake (1).

12. Rake (1) according to claim 11 , characterized in that the elevation (9) can be positively connected to the tine carrier (2), in particular by means of a locking bolt (16) connected to the elevation (9), which can be inserted into a corresponding locking bore (17) in the tine carrier (2) and can be locked by means of a cotter pin (11).

13. Rake (1) according to claim 11 or 12, characterized in that the elevation (9) can be positively connected to the receptacle (4), in particular by means of a slot (12) in the receptacle (4) which corresponds to the dimensions of the elevation (9).

14. Rake (1) according to one of claims 11 to 13, characterized in that the elevation (9) has two elevation elements (13) which can be connected symmetrically to a central plane of the rake (1), wherein the elevation elements (13) are in particular plate-shaped.

15. Rake (1) according to one of claims 1 to 14, characterized in that at least one, preferably two, lateral extension elements (14) are provided, each of which has an extension tine carrier (15) with tines (3) and can be detachably connected to the rake (1).

16. Rake (1) according to claim 15, characterized in that the tine carrier (2) can be detachably connected to the extension element (14) via a connecting element (19) that can be inserted into the tine carrier (2), wherein the connecting element (19) is preferably connected to the extension tine carrier (15), in particular welded to the extension tine carrier (15).

17. Rake (1) according to claim 15 or 16, characterized in that the extension element (14) and the tine carrier (2) have a corresponding recess, in particular a locking bore (17), into which, in a state in which the extension element (14) is connected to the tine carrier (2), a locking element can be inserted to lock a connection between the extension element (14) and the tine carrier (2).

18. Rake (1) according to one of claims 1 to 17, characterized in that the locking element is a locking bolt (16) of a protrusion (9) detachably connected to the tine carrier (2).

19. Rake (1) according to one of claims 1 to 18, characterized in that the tines (3) are made of wear-resistant steel, in particular of a steel available under the trade name HARDOX.

20. Rake (1) according to one of claims 1 to 19, characterized in that the tines (3) are formed by laser cutting from a plate-shaped metal.

21. Excavator with a rake (1) detachably attached to a quick-change device, characterized in that the rake (1) is designed according to one of claims 1 to 20.

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