attachment for a work machine

Abstract

Attachment for a work machine (11), in particular an excavator, - with a two-part loading shovel (19), consisting of - a trough-shaped base body (21) with a dozer blade (23) which extends along an underside of the base body (21) and comprises a working contour (24), and - a folding body (22) which is arranged pivotably relative to the trough-shaped base body (21), which is open at the rear and has a closing contour corresponding to the trough-shaped base body (21), which comprises a further working contour (26) and has a working tool (27) opposite it, - wherein the folding body (22) is pivotally mounted on the trough-shaped base body (21) and can be actuated by at least one working cylinder (42), and - with a coupling part (33) arranged on the trough-shaped base body (21), which has a base plate (44) and coupling elements (36) held between side cheeks (35), characterized in that - that the two-part loading shovel (19) comprises a rotation axis (46) which intersects or adjoins the dozer blade (23) and extends through the coupling part (33).

Description

The invention relates to an attachment for a working machine, in particular an excavator, having a two-part loading bucket.DE 20 2010 007 136 U1 discloses a folding blade in the form of a two-part loading blade. This loading bucket comprises a trough-shaped base body and a folding body. Via a pivot joint which is arranged fixedly on the base body and has a connecting plate opposite the folding blade, this pivot joint can be connected to the connecting plate on a handle of an excavator. By means of this pivot joint, the folding blade can be pivoted in different positions.Furthermore, a two-part loading bucket is known from DE 203 17 990 U1. This two-part loading bucket has a trough-shaped base body and a hinged body arranged pivotably thereto. A base plate of a quick-change device is provided on the base body. This makes it possible to easily install and replace the attachment to a boom handle of an excavator. Between a base plate of the quick-change device and the trough-shaped base body, a torsion-resistant construction is provided.The invention is based on the object of proposing an attachment for a working machine, in particular an excavator, by means of which simple actuation and precise working are made possible.This object is achieved by an attachment for a working machine, in particular an excavator, which comprises a two-part loading bucket which consists of a trough-shaped base body and a hinged body arranged pivotably thereto, wherein the trough-shaped base body comprises a blade which extends with a working contour in the longitudinal direction of the base body along an underside of the base body. The hinged body is open on the rear side and has a closing contour corresponding to the base body, which closing contour is formed with a further working contour. Opposite, a working tool is provided on the hinged body. The hinged body is pivotably mounted on the base body via a joint and can be actuated by at least one working cylinder. On the trough-shaped base body, a coupling piece of a quick-change device is provided, which comprises a base plate with coupling elements held between side cheeks. The two-part loading bucket includes an axis of rotation intersecting or adjacent the blade and extending through the coupler. This enables simplified control and handling of this attachment. The pivot point of the blade lies in the axis of rotation. This is the case both with a closed two-part loading bucket, for example when working with the working tool on the folding body, and with an open loading bucket, for example when working with the working contour of the blade.It is preferably provided that the axis of rotation intersects a working contour of the blade or is aligned so as to abut, in particular so as to abut tangentially, the working contour of the blade. As a result, no offset of the working contour can occur during the alignment and / or the introduction of a rotational movement of the blade about the axis of rotation. The working contour can be designed, for example, as a pull-off edge.In particular, it can be provided that, with respect to a lateral extension of the trough-shaped base body, a plane of symmetry is formed which extends through the coupling part, and the axis of rotation of the two-part loading bucket lies in this plane of symmetry.It is preferably provided that the coupling elements of the coupling part are aligned symmetrically to the axis of rotation of the two-part loading bucket. This enables a symmetrical connection of a quick-change device to the attachment.Alternatively, it can be provided that the axis of rotation of the two-part loading bucket lies in the axis of rotation of the quick-change device or a rotator or a tilt rotator. In this embodiment, it is made possible that, for example, the coupling elements of the coupling part can be positioned outside the axis of rotation of the two-part loading shovel, wherein a cassette on the quick-change device can again compensate for this offset.Furthermore, it is preferably provided that the folding body has, as a further working tool, a blade base with a pull-off edge, wherein the blade base with the pull-off edge, in a closed position of the folding body, has an orientation with respect to the trough-shaped base body which is oriented parallel to the base plate of the coupling part. This in turn means that the coupling elements on the coupling part are aligned in a plane which is in turn parallel to the base plate of the coupling part. This in turn facilitates simplified handling in comparison with other known coupling parts in which the plane through the coupling elements is oriented at an acute angle to the base plate of the coupling part.According to a preferred embodiment, it is provided that, starting from the base plate of the coupling part and along a rear side of the trough-shaped base body up to the respective side walls of the base body, on which at least one working cylinder is provided, a closed housing for the internal guidance of hydraulic lines is formed. This provides increased working safety.The invention and further advantageous embodiments and developments thereof are described and explained in more detail below with reference to the examples illustrated in the drawings. The features to be gathered from the description and the drawings can be used according to the invention individually or together in any combination. The following are shown: FIG. 1 shows a schematic side view of a working machine with an attachment arranged thereon, FIG. 2 shows a schematically enlarged view of the attachment as a two-part loading bucket in a first working position, FIG. 3 shows a schematic view of the attachment in a further working position, FIG. 4 is a schematic sectional view of the attachment, FIG. 5 shows a schematic view from the front of the attachment, FIG. 6 is a schematic view from above of the attachment, and FIG. 7 shows a schematic view from behind of the attachment.FIG. 1 shows a working machine 11 with an attachment 12 arranged thereon. The working machine 11 can be, for example, an earth-working machine, in particular a hydraulic excavator, wheel loader or the like. Further alternative working machines can also be provided. The attachment 12 is connected via at least one connecting line, in particular hydraulic connecting lines, to a coupling 14 on a handle 15 of the working machine 11. This coupling 14 may be formed on a rotator 16 or a tilt rotator. The rotator 16 preferably comprises a quick-change device as the coupling 14, which engages with the attachment 12 in a simple manner and can be released therefrom in order to connect another attachment. Such a rotator 16 or tilt rotator can also have a hydraulic rotary feedthrough which serves for controlling the attachment 12. The rotator 16 or tilt rotator is rotatably connected to the shaft 15 about a rotation axis 18.FIG. 2 shows a schematic side view of the attachment 12 according to FIG. 1 in an enlarged manner. In this attachment 12, a folding blade or a two-part loading blade 19 comprises a trough-shaped base body 21 and a folding body 22, which is mounted on the trough-shaped base body 21 such that it can pivot with respect to the trough-shaped base body 21. On an underside of the base body 21 and facing the folding body 22, a blade 23 with a working contour 24 is provided in the longitudinal direction along the base body 21. This working contour 24 is designed, for example, as a pull-off edge. The grading blade 23 and the scraper edge are also referred to as a grading blade.The hinged body 22 is open on the rear side with respect to the base body 21 and has a closing contour 25 corresponding to the base body 21, on which a further working contour 26 is provided. Opposite this further working contour 26, a working tool 27 is provided on the hinged body 22. This working tool 27 comprises at least one blade bottom 28, which is designed as a pull-off surface, and a pull-off edge 29.In FIG. 2, the loading bucket 19 is shown in a first working position or in a closed working position. The hinged body 22 rests with its closing contour on the corresponding contour of the trough-shaped base body 21. Thereby, a closed loading bucket 19 is formed.In FIG. 3, the loading bucket 19 is shown in a second or further working position. In this working position, the folding body 22 is lifted from the trough-shaped base body 21 and an open loading bucket 19 is formed. In this working position, for example, the blade 23 with its working contour 24 can be used. It can also be provided that the loading bucket 19 is placed on a base or object in this working position, so that a material can be picked up. It is also possible that individual components can be held or even comminuted by the teeth 31 arranged on the trough-shaped base body 21 and the folding body 22.FIG. 4 shows a schematic sectional view through a plane of symmetry 45 of the loading bucket 19 according to FIG. 5. FIG. 5 shows a view from the front of the loading blade 19. FIG. 6 shows a plan view of the loading blade 19 and FIG. 7 shows a rear view. These views show that the attachment 12 comprises a coupling part 33 on the loading bucket 19. The coupling part 33 is preferably arranged fixedly on the loading bucket 19. The coupling part 33 is provided on the trough-shaped base body 21. This coupling part 33 is oriented to the plane of symmetry 45. This coupling part 33 comprises a base plate 34 and side cheeks 35 arranged thereon, between which coupling elements 36 are arranged. The clutch 14, in particular the quick-change device, engages these coupling elements 36 for connecting the loading bucket 19 to the clutch 14.The coupling part 33 is aligned with an upper side of the trough-shaped base body 21. Below the base plate 34 and aligned with a rear side of the trough-shaped base body 21, a closed housing 38 is provided, within which hydraulic lines 39 are guided. This closed housing 38 extends as far as the side walls 41 of the trough-shaped base body 21, to which working cylinders 42 are assigned. These power cylinders 42 control opening and closing of the folder 22.The sectional view according to FIG. 4 shows that the longitudinal axes 36 of the coupling elements 36 are aligned in a plane and parallel to the plane of extension of the base plate 34. Furthermore, it is provided that the working tool 27, in particular the blade bottom 28, with the scraper edge 29 are oriented parallel to the base plate 34, i.e. in a 0-degree position.In FIGS. 5 and 7, the plane of symmetry 45 is shown. Starting from this plane of symmetry 45, the trough-shaped base body 21 and the hinged body 22 extend symmetrically, i.e. outwards on both sides.FIG. 4 shows the sectional view in the plane of symmetry 45. The axis of rotation 46 of the loading bucket 19 lies in this plane of symmetry 45; this axis of rotation 46 extends through the coupling part 33 and intersects the working contour 24 of the blade 23 or adjoins it. The axis of rotation 46 can lie between the blade 23 of the trough-shaped base body 21 and the further working contour 26 of the folding body 22 and in the plane of symmetry 45. This further working contour 26 points toward the blade 23 and, in a closed working position of the folding body 22 toward the base body 21, abuts the blade 23.According to a first embodiment, it can be provided that the coupling elements 36 are aligned symmetrically with respect to the axis of rotation 46. Alternatively, it can also be provided that the coupling elements 36 are oriented offset at least slightly in the direction of the working tool 27. In this case, the coupling point on the quick-change device of the rotator 16 is likewise offset to the same extent, such that the axis of rotation 46 of the two-part loading bucket 19 and the axis of rotation 18 of the rotator 16 or of the tilt rotator lie in a common axis. This embodiment in turn allows simplified control and handling of the attachment.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 20 2010 007 136 U1

[0002] DE 203 17 990 U1

[0003]

Claims

Attachment for a working machine (11), in particular excavator, - having a two-part loading bucket (19), consisting of - a trough-shaped base body (21) with a dozer blade (23), which extends along an underside of the base body (21) and comprises a working contour (24), and - a hinged body (22), which is arranged pivotably to the trough-shaped base body (21) and is open on the rear side and has a closing contour corresponding to the trough-shaped base body (21), which closing contour comprises a further working contour (26) and has a working tool (27) opposite the latter, - wherein the hinged body (22) is mounted pivotably on the trough-shaped base body (21 and can be actuated by at least one working cylinder (42), and - having a coupling part (33), which is arranged on the trough-shaped base body (21) and has a base plate (44) and coupling elements (36) held between side cheeks (35), characterized in that, the two-part loading bucket (19) comprises an axis of rotation (46) which intersects or adjoins the blade (23) and extends through the coupling part (33).Working implement according to claim 1, characterised in that the axis of rotation (46) intersects a working contour (24) of the blade (23) or is aligned so as to abut, in particular so as to abut tangentially, the working contour (24) of the blade (23).Working implement according to claim 1 or 2, characterised in that a plane of symmetry (45) is formed with respect to a lateral extension of the trough-shaped base body (21), which extends through the coupling part (33) and in this plane of symmetry (45) the axis of rotation (46) of the two-part loading shovel (19) lies.Attachment according to one of the preceding claims, characterized in that the coupling elements (36) of the coupling part (33) are aligned symmetrically with respect to the axis of rotation (46).Attachment according to one of the preceding claims 1 to 3, characterized in that the axis of rotation (46) of the two-part loading bucket (19) lies in an axis of rotation (18) of a quick-change device or a rotator (16) or a tilt rotator.Attachment according to one of the preceding claims, characterized in that the folding body (22) has, as working tool (27), a blade base (28) with a pull-off edge (29), which, in a closed position of the folding body (22), are aligned parallel to the base plate (34) of the coupling part (33) with respect to the trough-shaped base body (21).Attachment according to one of the preceding claims, characterized in that the coupling elements (36) of the coupling part (33) lie in a plane which is aligned parallel to the base plate (34) of the coupling part (33).Attachment according to one of the preceding claims, characterized in that, starting from the base plate (34) of the coupling part (33), a closed housing (38) is formed along a rear side of the trough-shaped base body (21) as far as side walls (41) of the trough-shaped base body (21), to each of which at least one working cylinder (42) is assigned, for the internal guidance of hydraulic lines (39).

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