Boom and working machine with such a boom

Abstract

Boom for a working machine, comprising a first leg (4), a second leg (5) connected to the first leg (4), at least one pulley (7) and at least one support rope (8) guided on the at least one pulley (7), characterized in that a guide rail (9) is fixed to the second leg (5), on which the at least one pulley (7) is guided.

Description

[0001] The present invention relates to a boom for a working machine for performing lifting or lowering movements of a tool or load-bearing device mounted on at least one support cable. The present invention further relates to a working machine with such a boom.

[0002] Construction machines such as cable excavators are used in specialist foundation engineering, demolition work, and material handling, and are characterized by their ability to move heavy loads using a support cable guided on a pulley. In the prior art of these machines, the movement of a tool or load-handling device attached to the support cable is achieved by winding or unwinding the support cable from or onto a winch.

[0003] In certain applications, however, there is a need to move the tool or load-handling device horizontally. To enable this, existing machines require pivoting the upper structure or boom, which causes both horizontal movement of the tool or load-handling device and vertical movement of the boom. However, this is sometimes not possible in confined work areas.

[0004] The object of the present invention is to provide a boom for a working machine that enables the horizontal displacement of a tool or load-handling device mounted on at least one support cable, independent of any height adjustment of the boom and / or any pivoting of the superstructure and / or any rotation of a support machine of the working machine. Furthermore, it is an object of the present invention to provide a working machine with such a boom.

[0005] This problem is solved according to the invention by the boom with the features of claim 1 and the working machine with the features of claim 12.

[0006] According to the invention, a boom for a working machine is provided, comprising a first leg, a second leg connected to the first leg, at least one pulley, and at least one support cable guided on the at least one pulley. A guide rail is fixed to the second leg, which guides the at least one pulley. The second leg is pivotable relative to the first leg.

[0007] The guide rail, which is located on the second leg, allows the at least one pulley to be mounted so that it can move translationally relative to the second leg. The at least one pulley can therefore be moved within a travel range defined by the guide rail, allowing it to be positioned in different positions without requiring any height adjustment of the boom.

[0008] The term "carrying cable" should be understood in its broadest sense. A carrying cable can therefore be a simple holding cable for the tool, or it can be a working cable by means of which the tool is operated, such as the closing cable of a mechanical double-cable grab.

[0009] In addition to at least one pulley, at least one further pulley can also be provided on the second leg, over which, for example, a hose is guided.

[0010] This additional pulley can be moved synchronously with the at least one pulley or independently of the pulley on the second leg in its longitudinal direction.

[0011] In a preferred embodiment, the boom according to the invention comprises a drive unit by means of which the cable pulley can be moved in the guide rail.

[0012] In an exemplary embodiment of the boom according to the invention, the drive unit is a linear drive unit.

[0013] The drive unit can be a hydraulic cylinder.

[0014] For example, the drive unit is fixed to the second leg.

[0015] In a preferred embodiment of the boom according to the invention, the second leg forms a housing that defines a cavity.

[0016] The drive unit, the guide rail and the guide roller can be arranged in the cavity.

[0017] The second leg includes, for example, a first recess on its lower side in a vertical direction, through which the support cable can be inserted from the cavity, and a second recess through which the support cable can be removed from the cavity.

[0018] The second recess can extend in the longitudinal direction of the second leg in such a way that the supporting cable can be brought out of the cavity in any possible cable pulley position.

[0019] The pulley, for example, can be moved in the longitudinal direction of the second leg.

[0020] In a preferred embodiment of the boom according to the invention, the second leg, in a functional assembly state of the boom on a working machine, is oriented such that it extends in a horizontal direction. The longitudinal direction of the second leg thus corresponds to the horizontal direction.

[0021] In an exemplary embodiment of the boom according to the invention, the first leg comprises a fixed attachment point, and the second leg comprises at least two, in particular three, four, or a plurality of, variable attachment points, or also a continuously adjustable attachment point. At one of the variable attachment points or the continuously adjustable attachment point, the second leg is connected to the fixed attachment point, in particular via a fastening element. The second leg can thus be variably mounted on the first leg.

[0022] The fixed attachment point and / or the variable attachment points can be formed in the form of a recess in the first leg or in the second leg.

[0023] The fastening element is, for example, a detachable fastening element.

[0024] The releasable fastening element can be a connecting bolt located in the recess of the first leg and / or one of the recesses of the second leg.

[0025] It is also conceivable that the fastening element is fixed at the fixed fastening point on the first leg and extends into one of the recesses of the second leg that form the variable fastening points.

[0026] In a preferred embodiment of the boom according to the invention, the fixed attachment point is arranged at an end region of the first leg facing the second leg.

[0027] The variable attachment points are aligned with each other, for example, in the longitudinal direction of the second leg, preferably in a horizontal direction.

[0028] The variable attachment points can be spaced apart from each other in the longitudinal direction of the second leg.

[0029] In an exemplary embodiment, the boom according to the invention comprises a connecting leg. The second leg comprises a further fixed attachment point, and the first leg comprises at least two, in particular three, four, or a plurality, further variable attachment points, or also a continuously adjustable attachment point for the connecting leg. The connecting leg is connected to the second leg at the further fixed attachment point and to the first leg at the variable attachment point.

[0030] For example, the connecting leg is connected to the first leg or the second leg at opposite ends.

[0031] The number of additional variable attachment points of the second leg preferably corresponds to the number of additional variable attachment points of the first leg.

[0032] In a preferred embodiment of the boom according to the invention, the variable attachment points of the first leg each form a pair of attachment points with a corresponding variable attachment point of the second leg.

[0033] The variable attachment point of the first leg and the further variable attachment point of the second leg of each pair of attachment points are, for example, arranged relative to each other such that the second leg extends in a horizontal direction and / or the distance of the second leg to a bearing point of the first leg, at which the first leg can be mounted, for example, on a support machine such as the superstructure of a machine, is the same in the longitudinal direction of the second leg, regardless of which pair of attachment points is chosen for connecting the first leg to the second leg and the connecting leg to the first leg. If the pair of attachment points used to connect the second leg to the first leg and to connect the connecting leg to the first leg is changed, the height of the second leg changes.The distance of the pulley(s) to the pivot point of the first leg on the support machine of the arrangement remains the same, as does the overall length of the arrangement in the longitudinal direction, without having to change the position of the pulley(s) on the second leg.

[0034] The variable attachment points and the other variable attachment points are arranged on the first leg and on the second leg, respectively, in such a way that they allow for height adjustment of the second leg, i.e., movement of the second leg in a vertical direction.

[0035] A tool or load-bearing device can be fixed to the end of at least one of the support cables.

[0036] For example, a gripper is attached to the end of the support cable.

[0037] The additional fixed attachment point and / or the additional variable attachment points can (each) be designed in the form of a recess.

[0038] The connecting leg is connected, for example, to the first leg and / or the second leg (each) via a detachable fastening element, in particular a connecting bolt, which extends into one of the recesses.

[0039] Furthermore, a work machine will be provided which includes a boom as described above.

[0040] In a preferred embodiment, the working machine according to the invention comprises a carrier machine.

[0041] The carrier machine includes, for example, a chassis and a superstructure.

[0042] In an exemplary embodiment of the working machine according to the invention, the boom is pivotably mounted at a bearing point of the first leg on the carrier machine, in particular the superstructure.

[0043] The carrier machine can be equipped with at least one winch, onto which and from which the at least one carrying cable can be wound and unwound by means of at least one drive element.

[0044] In a preferred embodiment, the working machine according to the invention is a cable excavator or a drilling rig.

[0045] Further advantages and advantageous embodiments of the subject matter of the present invention can be found in the description, the drawing, and the claims. The scope of the invention encompasses all combinations of at least two features disclosed in the description, the claims, and / or the figures; that is, each feature mentioned in the description or shown in the figures can, on its own, be part of the claimed subject matter, independent of any further features and / or specifications mentioned or shown in the respective context.

[0046] An embodiment of a machine according to the invention is shown schematically simplified in the drawing and is explained in more detail in the following description. It shows: Fig. 1 a side view of a working machine according to the present invention, wherein a boom of the working machine is shown in a first assembly position; Fig. 2 one Fig. 1 corresponding view, wherein a second leg of the boom of the working machine is shown transparently and a working tool of the working machine is shown in various rope pulley positions; Fig. 3 one Fig. 1 corresponding view, showing the boom in a second mounting position; Fig. 4 one Fig. 1 corresponding view, showing the boom in a third mounting position; and Fig. 5 a Fig. 1 corresponding view, showing the boom in a fourth mounting position.

[0047] In the Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. Figure 5 shows a working machine 3 in the form of a cable excavator. The working machine 3 comprises a carrier machine 2 and a boom 1 mounted on the carrier machine 3.

[0048] The boom 1 comprises a first leg 4, a second leg 5, and a connecting leg 6, which together form a multi-joint. The boom 1 is mounted on the carrier machine 2 at a bearing point, allowing it to rotate about exactly one axis. The bearing point is located at one end of the first leg 4 facing the carrier machine 2.

[0049] The first leg 4, which is connected to the carrier machine 2, can be held by a bracing system that is either fixed or adjustable. For example, the bracing system for adjustment can include a pulley or a hydraulic cylinder.

[0050] The first leg 4 has a fixed attachment point 11 at one end facing the second leg 5. The second leg 5 comprises variable attachment points 12, 13, 14, 15. A fastening element, in particular a connecting bolt, is mounted at the fixed attachment point 11 of the first leg 4. The variable attachment points 12 to 15 of the second leg 5 are designed as recesses into which the fastening element fixed to the second leg 5 can be inserted to detachably connect the first leg 4 to the second leg 5.

[0051] The first leg includes further variable attachment points 17 to 20. The second leg 5 has a further fixed attachment point 16. The connecting leg 6 is connected at its end to the further fixed attachment point 16 to the second leg 5 and at one of the further variable attachment points 17 to 20 to the first leg 4. The first leg 4 and the second leg 5 are thus indirectly connected to each other via the connecting leg 6.

[0052] The additional variable fastening points 17 to 20 are formed as recesses in the first leg 4. At one end of the connecting leg 6 facing the first leg 4, a further fastening element, in particular a further connecting bolt, is provided. The further fastening element can be inserted into one of the recesses forming the additional variable fastening points 17 to 20 for the purpose of detachably connecting the connecting leg 6 to the first leg 4.

[0053] The second leg 5 is firmly connected to the connecting leg 6 at the further fixed attachment point 16 via a bolt.

[0054] In principle, the connecting leg can be fixed or adjustable. In the adjustable version, it can be implemented, for example, using a hydraulic cylinder or a pulley system, or using several fixed anchor points that can be selected depending on the existing requirements.

[0055] The variable attachment points 12 to 15 of the second leg 5 each form a pair of attachment points with a corresponding variable attachment point 17 to 20 of the first leg 4. The variable attachment point 11, 12, 13, 14 or 15 and the corresponding variable attachment point 17, 18, 19 or 20 of each pair of attachment points are arranged such that the second leg extends horizontally, regardless of which pair of attachment points is chosen to connect the legs 4, 5 and the connecting leg 6, and the distance of the second leg 5 to the bearing point of the first leg 4, at which the first leg 4 is mounted on the carrier machine 2, is equal in the longitudinal direction L of the second leg 5, which corresponds to the horizontal direction x.The position of the second leg 5 in the vertical direction y depends on which of the fastening pairs is selected to connect the legs 4, 5 and the connecting leg 6. The second leg 5 is thus height-adjustable without this height adjustment causing a displacement of the second leg 5 in the horizontal direction x. Fig. Figures 1 and 3 to 5 show the boom 1 in different mounting positions, in particular different height positions of the second leg 5, in which a first, a second or a third pair of attachment points is used to connect the legs 4, 5 and the connecting leg 6.

[0056] As from Fig.As can be seen in Figure 2, a guide rail 9 is attached to the second leg 5. The guide rail 9 extends in the longitudinal direction L of the second leg, which corresponds to the horizontal direction x. At least one pulley 7 is movably mounted in the guide rail 9 in the longitudinal direction L of the second leg within a defined range of motion S. A drive unit 10 is provided for moving the pulley 7. The drive unit is a hydraulic cylinder. At least one cable 8 is guided on the pulley 7, and a tool 21 is fixed to its end. Reference symbol list: 1 boom 2 Carrier machine 3 working machine 4 first thigh 5 second thigh 6 connecting legs 7 Pulley 8 Support cable 9 Guide rail 10 Drive unit 11 fixed attachment point 12 variable mounting points 13 variable mounting points 14 variable mounting points 15 variable mounting points 16 additional fixed attachment points 17 additional variable mounting points 18 additional variable mounting points 19 additional variable mounting points 20 additional variable mounting points 21 tools L Longitudinal extension direction of the second leg S range of movement x horizontal direction y vertical direction

Claims

[1] Boom for a working machine, comprising a first leg (4), a second leg (5) connected to the first leg (4), at least one pulley (7) and at least one support rope (8) guided on the at least one pulley (7), characterized by , that a guide rail (9) is fixed to the second leg (5), on which at least one pulley (7) is guided. [2] Boom according to claim 1, characterized by a drive unit (10) by means of which the at least one cable pulley (7) in the guide rail (9) can be moved translationally. [3] Boom according to claim 2, characterized by , that the drive unit (10) is a linear drive unit, in particular a hydraulic cylinder. [4] Cantilever according to any one of claims 1 to 3, characterized by , that the pulley (7) is movable in the longitudinal extension direction (L) of the second leg (5). [5] Boom according to any one of claims 1 to 4, characterized by, that the second leg (5) extends in the horizontal direction (x). [6] Cantilever according to any one of claims 1 to 5, characterized by , that the first leg (4) comprises a fixed attachment point (11) and the second leg (5) comprises at least two variable attachment points (12, 13, 14, 15), wherein the second leg (5) is connected to the first leg (4) at one of the variable attachment points (12, 13, 14, 15) at the fixed attachment point (11) of the first leg (4). [7] Boom according to claim 6, characterized by , that the fixed attachment point (11) is located at an end region of the first leg (4) facing the second leg (5). [8] Cantilever according to claim 6 or 7, characterized by , that the variable attachment points (12, 13, 14, 15) are aligned with each other in the longitudinal extension direction (L) of the second leg (5). [9] Boom according to any one of claims 1 to 8, characterized bya connecting leg (6), wherein the second leg (5) comprises a further fixed attachment point (16) and the first leg (4) comprises at least two further variable attachment points (17, 18, 19, 20), wherein the connecting leg (6) is connected to the second leg (5) at the further fixed attachment point (16) and is connected to the first leg (4) at one of the further variable attachment points (17, 18, 19, 20). [10] Boom according to claim 9, characterized by , that the connecting leg (6) is connected at a first end to the second leg (5) and at a second end opposite the first end to the first leg (4). [11] Outrigger according to claim 9 or 10, each in conjunction with one of claims 6 to 8, characterized by, that the variable attachment points (17, 18, 19, 20) of the first leg (4) each form an attachment point pair with a corresponding variable attachment point (12, 13, 14, 15) of the second leg (5), wherein the variable attachment point (17, 18, 19, 20) of the first leg (4) and the corresponding variable attachment point (12, 13, 14, 15) of the second leg (5) of each attachment point pair are arranged relative to each other such that the second leg (5) extends in the horizontal direction (x) and / or a distance of the second leg (5) to a bearing point of the first leg (4), at which the first leg (4) can be supported on a carrier machine of a working machine, is equal in the longitudinal direction (L) of the second leg (5), independently of which pair of attachment points the first leg (4), the second leg (5) and the connecting leg (6) are connected to each other. [12] Working machine, characterized by a boom (1) according to any one of claims 1 to 11. [13] Working machine according to claim 12, characterized by a carrier machine (2) on which the boom (1) is mounted. [14] Working machine according to claim 13, characterized by , that the boom (1) is pivotably mounted on the carrier machine (2) at a bearing point of the first leg (4). [15] Working machine according to any one of claims 12 to 14, characterized by , that the working machine (3) is a cable excavator, on whose carrier machine (2) the boom (1) is mounted.

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