Attachment for a working machine and method for attaching such an attachment

Abstract

The invention relates to an attachment for a work machine, in particular for a civil engineering machine, comprising a frame, a civil engineering tool, in particular designed as a drilling tool, and a drive unit for driving the civil engineering tool. According to the invention, the frame includes first support feet for placing the attachment on the ground. Furthermore, the civil engineering tool is connected to the drive unit via a joint, which allows the civil engineering tool to be folded down for placing the attachment with the attached civil engineering tool on the ground. The invention further relates to a work machine, in particular a civil engineering machine, with an attachment according to the invention. The invention further relates to a set comprising a work machine according to the invention and at least one main tool. The invention further relates to a method for attaching an attachment according to the invention to the mast of a work machine according to the invention.

Description

[0001] The present invention relates to an attachment according to the preamble of claim 1, a working machine and a set with such an attachment as well as a method for attaching such an attachment to the mast of a working machine.

[0002] When driving piles or sheet piles into the ground using pile drivers, it may be necessary to pre-drill the soil, depending on the soil conditions. This typically requires removing the main tool (e.g., vibrator or impact hammer) attached to the mast of the pile driver and attaching a drilling tool. After pre-drilling, the main tool is switched back to the main tool. These changes are complex and time-consuming. Furthermore, the long drilling tool required for pre-drilling necessitates an additional auxiliary tool for handling and attaching it. Alternatively, a separate unit with a dedicated drilling tool could be used for pre-drilling, but this requires the use of additional machinery on the construction site.

[0003] It is also known to store the main tool at the front of the mast, while a drilling rig for pre-drilling is permanently attached to one side of the mast. However, this increases the weight and dimensions of the pile driver and necessitates carrying additional equipment even in cases where pre-drilling is not required.

[0004] The present invention is therefore based on the objective of facilitating the changing of attachment tools on generic work machines, in particular for pre-drilling.

[0005] According to the invention, this problem is solved by an attachment having the features of claim 1 and by a method according to claim 15. Advantageous embodiments of the invention are described in the dependent claims and the following description.

[0006] Accordingly, an attachment for a construction machine is proposed, comprising a frame (or scaffold), a deep-cutting tool, and a drive unit to power the deep-cutting tool. The deep-cutting tool could be, for example, a drilling tool or a mixing tool. In the case of a drilling tool, it can be used, in particular, for pre-drilling the soil before driving piles, such as a pile driver or sheet pile driver. The drilling tool could be, for example, a rotary-driven auger or a drill string with a drill bit.

[0007] According to the invention, the frame comprises first support feet for placing the attachment on the ground. Since the excavation tool is considerably long and is not intended to be mounted on the machine only after the frame has been attached, the excavation tool is connected to the drive unit via a joint, according to the invention. This joint allows the excavation tool to be folded down to place the attachment, with the excavation tool attached, on the ground. The first support feet ensure, in particular, that the joint does not rest on the ground. The attachment can, for example, comprise three or more first support feet.

[0008] This makes it possible to position the attachment with the mounted digging tool on the ground in such a way that it can be easily picked up, especially by the machine itself. The machine could, for example, have a mast with a masthead, over which a lifting cable runs, allowing the attachment to be raised. Because the digging tool is angled to the side at the joint, the attachment can be placed upright on the ground using its first set of support legs and picked up from this position.

[0009] The articulated connection according to the invention, in combination with the first support feet provided on the attachment itself, allows for easier and faster changing of attachment tools, particularly for pre-drilling, than was previously possible. During normal operation, when the attachment is not needed, for example for pre-drilling, it is detached from the machine.

[0010] The drive unit can be a gearbox that translates the rotary motion of a drive shaft driven by a drive unit of the machine into a rotary motion of the drilling tool, which is designed in particular as a drilling tool (passive drive unit). Preferably, however, the drive unit is an active drive, for example a hydraulic or electric rotary drive, which is supplied by the machine via appropriate (hydraulic or electrical) supply lines.

[0011] In one possible embodiment, the joint is detachably connected to an output shaft of the drive unit via connecting elements. This makes it possible to remove the elongated excavation tool from the frame or the output shaft for transport, allowing the frame to be transported in a space-saving position. In particular, after removing the joint and excavation tool, the first support legs can be retracted or folded in to reduce the transport dimensions of the attachment. A bolted connection or a mechanical quick coupler, for example, can be used for the mechanical connection between the joint and the output shaft.

[0012] Alternatively or additionally, the joint can be designed as a universal joint. This provides additional flexibility when bending the deep-construction tool.

[0013] In another possible embodiment, the first support feet comprise first support surfaces on which the attachment rests when parked on the ground. These first support surfaces constitute the contact surfaces between the first support feet and the ground. The first support feet can have widened contact sections at their ends, with the first support surfaces located on their undersides. These can be designed, for example, as square or round plates and increase the contact area of ​​the attachment.

[0014] The joint is positioned above the first support surfaces (in the supported position, when the joint is resting on the ground via its first feet). This means that the joint does not contact the ground in the supported position.

[0015] In another possible embodiment, the deep-drilling tool is a drilling tool, specifically designed as an auger. The auger of the auger can extend essentially the entire length from the joint to the end of the drilling tool. Alternatively, the drilling tool can comprise a drill string connected to the joint, at the end of which a drill head (which can be designed as an auger) is arranged.

[0016] In another possible embodiment, the frame includes at least one guide element for the adjustable mounting of the attachment on a mast of a work machine. The guide element allows the attachment to be moved along the mast to insert or withdraw the deep-digging tool into the ground. The attachment can function as an attachment carriage by means of the at least one guide element.

[0017] Preferably, the frame includes guide shoes for moving the attachment along a mast guide. The guide shoes can be designed to engage with or grip guide rails arranged on the front or side surfaces of the mast.

[0018] In another possible embodiment, the first support legs are movably, and in particular pivotably, mounted on the frame. This allows the first support legs to be moved, for example, into an operating position for use on the mast or into a transport position, in which the attachment has smaller dimensions. To place the attachment on the ground, the first support legs are moved into a support position, in particular by pivoting. In an operating position on the mast or in a transport position, the support legs are preferably folded against the frame, in particular by being folded up.

[0019] As an alternative to swiveling the first support legs, they can be designed to be extendable and retractable. A combination of swiveling and telescopic first support legs is also conceivable.

[0020] In another possible embodiment, it is provided that the first support feet are movable, in particular pivotable, from a support position which allows the attachment to be parked with the attached, angled drilling tool, into a transport position in which the attachment has reduced dimensions compared to the support position.

[0021] In another possible embodiment, the frame includes, in addition to the first support legs, second support legs, which are particularly shorter than the first. The second support legs preferably allow the frame, including the drive unit, to be stored for transport after the excavation tool has been disassembled (and especially after the joint has been removed). The attachment can include three or more second support legs. The second support legs have, in particular, corresponding second support surfaces on which the attachment rests on the ground (especially in a transport position). The descriptions of the first support surfaces and their optional configurations apply analogously to the second support surfaces.

[0022] At least one second support leg is fixed to the frame and / or at least one second support leg is movable, in particular pivotable, on the frame. All second support legs can be fixed or movable, in particular pivotable, on the frame. Preferably, one or more second support legs are fixed or rigidly arranged, while at least one further second support leg is movable, in particular pivotable, on the frame.

[0023] In another possible embodiment, at least one second support leg is connected to a first support leg, preferably forming a single piece. The first and second support legs, connected to each other, are preferably pivotally mounted on the frame, allowing the attachment to be placed on either the first or the second support leg by pivoting. This saves on components. For the support position, the connected support legs are rotated or pivoted so that the first support leg's first bearing surface points downwards. For the transport position, the connected support legs are preferably rotated or pivoted so that the second support leg's second bearing surface points downwards.

[0024] In another possible embodiment, the drive unit is a hydraulic rotary drive, and the attachment preferably includes hydraulic connections for connecting a hydraulic system of a machine to the rotary drive. Optionally, the attachment can have a hydraulic quick-release coupling, allowing for quick and easy connection of the hydraulic supply after the attachment has been mounted on the mast of the machine. The hydraulic connections can be located in the area of ​​guide elements for the adjustable mounting of the attachment on the mast of the machine.

[0025] The invention further relates to a working machine with an attachment according to the invention. The same properties, features, and advantages result as already described with regard to the attachment according to the invention. Therefore, a repetitive description is omitted. In particular, the attachment of the working machine according to the invention can be configured according to any of the previously described embodiments, in any combination.

[0026] The machine in question is, in particular, a civil engineering machine, specifically a vibratory pile driver or a hammer pile driver (a pile driver with a driving ram). The attachment can preferably be used for pre-drilling and can be attached and subsequently detached before driving in the pile.

[0027] The working machine preferably comprises a carrier unit and a mast mounted on the carrier unit. The mast can be designed as a lattice mast or as a pole (e.g., a rigid pole or a telescopic pole) with a box-shaped profile.

[0028] The mast can be oriented vertically or at an angle, for example, when drilling with the attachment. The mast can be mounted on the carrier vehicle via an adjustable mast kinematic system.

[0029] The mast can have a masthead at its upper end, over which a hoist cable is routed. A load-bearing device for attaching a load can be attached to the hoist cable. The hoist cable can serve as an aid for lifting loads and / or for self-assembly of the work machine. Optionally, the work machine can be designed so that it can lift the attachment to the mast itself using the hoist cable. For this purpose, the attachment can have one or more attachment points for securing a lifting device that can be raised via the hoist cable.

[0030] In one possible embodiment, the mast of the working machine has a mast guide on which the attachment can be adjustable along the longitudinal axis of the mast. The working machine preferably has a feed system for exerting a feed force on the attachment mounted on the mast. The feed system can comprise at least one hydraulic feed cylinder or one or more feed winches, via which a feed force can be exerted on the attachment.

[0031] The invention further relates to a set comprising the machine according to the invention, the attachment according to the invention, and at least one main tool, which can be stored on the mast in place of the attachment. In the case of a pre-drilling tool, the main tool is removed and the attachment is mounted. After pre-drilling, the attachment is removed again and the main tool is mounted, so that the pile can be driven into the ground at the pre-drilled location. The main tool can comprise a vibrator (vibration unit for generating vibrations for driving the pile) or a hammer (e.g., a hydraulic hammer).

[0032] The invention further relates to a method for attaching the attachment according to the invention to the mast of the working machine according to the invention. Here, too, the same properties, features and advantages arise as already described with regard to the attachment according to the invention.

[0033] In this process, the attachment with its articulated excavation tool is first placed on the ground near the work machine using its initial support legs (support position). The attachment is then lifted by a hoist or by the work machine itself (for example, by the previously described lifting cable of the mast head) and mounted on the mast. The attachment is preferably mounted on the mast in an adjustable position using a mast guide.

[0034] During the lifting of the attachment, the digging tool in particular aligns itself vertically. This is made possible by the joint, which ensures that the elongated digging tool is bent to the side in the support position.

[0035] Subsequently, pre-drilling of the soil can be carried out using the attachment's deep-drilling tool, which is designed as a drilling implement. This tool is driven by the attachment's drive unit. After pre-drilling, the attachment can be removed and a main tool mounted on the mast.

[0036] Further features, details and advantages of the invention will become apparent from the exemplary embodiments explained below with reference to the figures. The figures show: Fig. 1: a side view of an embodiment of the machine according to the invention; Fig. 2: a perspective view of the attachment according to the invention in an exemplary embodiment; Fig. 3: a front view of the attachment placed on the ground in front of the working machine according to an exemplary embodiment; and Fig. 4-5: Perspective views of an embodiment of the attachment according to the invention in the support position and in the transport position.

[0037] In the Fig. Figure 1 shows an embodiment of the machine 1 according to the invention in a side view. The machine 1 comprises a carrier device 2 and a mast 3 which is adjustable on the carrier device 2 via a mast kinematics 5 and which is mounted in the Fig. Figure 1 is shown only schematically. The mast kinematics 5, for example, allow for inclined mast positions to be achieved for creating angled boreholes. Alternatively, the mast 3 can be mounted on the carrier device 2 without mast kinematics 5. In the illustrated embodiment, the latter has a crawler chassis, but could alternatively have a different chassis, in particular a wheeled chassis.

[0038] The mast 3 can be designed as a mast with a box-like profile. The mast 3 can have a masthead 4 at its upper end, which may include one or more pulleys over which a lifting cable 6 is guided. The support device 2 can have a corresponding lifting cable winch (not shown). A load-handling device for lifting a load can be attached to the lifting cable 6.

[0039] In the Fig. Figure 1 shows an embodiment of the attachment 10 according to the invention mounted on the mast 3. The attachment 10 of this embodiment has, as a deep-drilling tool 14, a drilling tool with an auger, which is used for pre-drilling the soil before the insertion of piles by another main tool (not shown, as it has been removed from the mast 3). A guide device for guiding the drilling tool can be arranged at a lower end of the mast 3.

[0040] The Fig. Figure 2 shows an embodiment of the attachment 10 according to the invention in a perspective view. The attachment 10 comprises a frame 12 with a drive unit 16. This can be designed as a hydraulic rotary drive and rotate the drilling tool 14 via an output shaft. The drilling tool 14 is connected to an output shaft of the drive unit 16 via a joint 18, which is preferably designed as a universal joint. This allows the drilling tool 14 to be tilted to the side (see Figure 2). Fig. 2 and Fig. 3).

[0041] The attachment 10 comprises several first support legs 21, 22, by means of which the attachment 10 is in a support position (shown in the Fig. 2) with the attached drilling tool 14, it can be placed on the ground. The first support legs 21, 22 are of such length that the joint 18 hangs in the air above the ground. As shown in the front view of the attachment 10 in the Fig. As shown in Figure 3, the drilling device 14 preferably rests on the ground with its end furthest from the joint 18 and hangs in the air at its other end on the joint 18 between the first support feet 21, 22.

[0042] The first support feet21, 22 can have widened contact sections at their lower ends (in the support position), the undersides of which form first support surfaces 24.

[0043] In the Fig. In the embodiment shown in Figure 2, the attachment 10 has guide elements 13 in the form of guide shoes, which can be slidably mounted on a mast guide of the machine 1. In the attached state, the attachment 10 then forms an attachment slide, which can be moved along the mast, in particular by a corresponding feed system of the machine 1 (not shown).

[0044] Hydraulic connections 17 can be located on the frame 12 for the hydraulic supply of the rotary drive 16, for example in the area or above the guide elements 13 (see figure). Fig. 2) However, different arrangements and designs are conceivable. Hydraulic lines can run between the hydraulic connections 17 and the rotary drive 16, which are located in the Fig. 2, however, are not shown.

[0045] The Fig. Figure 4 shows an embodiment of the attachment 10 in the support position, with the drilling tool 14 hidden. Furthermore, all components except the first support legs 21, 22 are shown by dashed lines. The attachment may also have hydraulic connections 17, which are not shown. Likewise, hydraulic lines running between the hydraulic connections 17 and the rotary drive are schematically indicated by a box 19.

[0046] To reduce the dimensions of the attachment 10 for transport, for which the drilling tool 14 is removed from the frame 12, the attachment 10 can have second support feet 31, 33.

[0047] In one embodiment, the attachment 10 comprises a front first support leg 21 pivotably mounted on the frame 12 and two rear first support legs 22, each also pivotably mounted on the opposite side of the frame 12. This results in stable support in the support position via a total of three support legs 21, 22.

[0048] In one embodiment, the attachment 10 comprises two rear second support legs 32 fixedly arranged on the frame 12. A front second support leg 31 can be fixedly connected to the front first support leg 21 or formed integrally with it. The interconnected front first and second support legs 21, 31 can be pivotally mounted on the frame 12 about a common axis of rotation 20 (which can be formed by a common pivot section formed on or connected to the front support legs 21, 31).

[0049] To move the attachment 10 from the in Fig. In the support position shown in Figure 4, in which the joint 18 hangs in the air due to the greater length of the first support legs 21, 22, the attachment 10 is moved to a transport position in which the attachment 10 has a lower height above the ground due to the shorter length of the second support legs 31, 32. The rear first support legs 22 are pivoted upwards, while the front first and second support legs 21, 31 are pivoted about the common axis of rotation 20, so that in the transport position the second support surface 34 of the front second support leg 31 points towards the ground or rests on the ground. This transport position is shown in the Fig. Figure 5 shows that any hydraulic connections that may be planned are schematically indicated as boxes 17 and hydraulic connections as box 19.

[0050] Of course, other designs of the first and second support feet 21, 22, 31, 32 are conceivable, for example different lengths, a different number of support feet and / or other arrangements on the frame 12.

[0051] The arrangement and design of the guide elements 13 as well as the arrangement and design of the hydraulic connections 17 are independent of the design and arrangement of the first and second support feet 21, 22, 31, 32 and the arrangement of the joint 18.

[0052] The attachment 10 according to the invention, due to the articulated connection of the drilling tool 14 and the integrated support feet 21, 22, 31, 32, allows the pre-drilling drive 16 with the attached drilling tool 14 to be parked at any location on the construction site. The attachment 10 can be parked and picked up quickly and without the aid of another machine.

[0053] The need for a transport frame is eliminated in both positions (support position and transport position) because it is no longer required due to the integrated feet. The support device formed by the feet offers two combined support options: one position with the attached drilling tool 14 (support position, see below). Fig. 2-4), as well as another position without drilling tool 14 with reduced transport size (transport position, cf. Fig. 5). Reference symbol list: 1 working machine 2 Carrier device 3 masts 4 Masthead 5 Mast kinematics 6 hoist rope 10 attachments 12 frame 13 Guide element 14 Civil engineering tools 16 Drive unit 17 Hydraulic connection 18 joint 20 Rotary axis 21 First support leg (front) 22 First support leg (rear) 24 First support surface 31 Second support leg (front) 32 Second support leg (rear) 34 Second support surface

Claims

[1] Attachment (10) for a working machine (1), in particular a civil engineering machine, comprising a frame (12), a civil engineering tool (14) and a drive unit (16) for driving the civil engineering tool (14), characterized by , that the frame (12) includes first support feet (21, 22) for placing the attachment (10) on the ground and that the digging tool (14) is connected to the drive unit (16) via a joint (18) which allows the digging tool (14) to be folded down to place the attachment (10) with the digging tool (14) attached on the ground. [2] Attachment (10) according to claim 1, wherein the joint (18) is detachably connected to an output shaft of the drive unit (16) via connecting means and / or wherein the joint (18) is a cardan joint. [3] Attachment (10) according to claim 1 or 2, wherein the first support feet (21, 22) comprise first support surfaces (24) on which the attachment (10) rests on the ground when parked, wherein the joint (18) is arranged above the first support surfaces (24). [4] Attachment (10) according to one of the preceding claims, wherein the deep-digging tool (14) is a drilling tool, which in particular is designed as a drill auger or comprises a drill string connected to the joint (18) at the end of which a drill head is arranged. [5] Attachment (10) according to one of the preceding claims, wherein the frame (12) comprises at least one guide element (13) for adjustable mounting of the attachment (10) on a mast (3) of a working machine (1), preferably guide shoes for moving the attachment (10) along a mast guide. [6] Attachment (10) according to one of the preceding claims, wherein the first support feet (21, 22) are movably, in particular pivotably, mounted on the frame (12). [7] Attachment (10) according to the preceding claim, wherein the first support feet (21, 22) are movable, in particular pivotable, from a support position which allows the attachment (10) with attached, articulated deep-construction tool (14) to be parked into a transport position in which the attachment (10) has reduced dimensions compared to the support position. [8] Attachment (10) according to one of the preceding claims, wherein the frame (12) comprises second support legs (31, 32) which in particular have a shorter length than the first support legs (21, 22), wherein at least one second support leg (32) is fixedly arranged on the frame (12) and / or at least one second support leg (31) is movably, in particular pivotably, mounted. [9] Attachment (10) according to the preceding claim, wherein at least one second support foot (31) is connected to a first support foot (21), in particular being formed in one piece, wherein the first and second support feet (21, 31) connected to each other are preferably pivotably mounted on the frame (12) and enable the attachment (10) to be placed on the first or the second support foot (21, 31) by pivoting. [10] Attachment (10) according to one of the preceding claims, wherein the drive unit (16) is a hydraulic rotary drive, wherein the attachment (10) preferably comprises hydraulic connections (17), in particular a hydraulic quick coupling, for connecting a hydraulic system of a working machine (1) to the drive unit (16). [11] Working machine (1), in particular a civil engineering machine, with an attachment (10) according to one of the preceding claims, wherein the working machine (1) preferably comprises a carrier unit (2) and a mast (3) mounted on the carrier unit (2). [12] Working machine (1) according to the preceding claim, wherein the mast (1) has a mast guide on which the attachment (10) is adjustably mounted along the longitudinal axis of the mast (3), wherein the working machine (1) preferably comprises a feed system for exerting a feed force on the attachment (10) mounted on the mast (3). [13] Working machine (1) according to one of the two preceding claims, wherein the mast (3) is adjustably mounted on the carrier device (2) via a mast kinematics (5) and / or wherein the mast (3) has a mast head (4) at its upper end, over which a lifting cable (6) is guided. [14] Set comprising a working machine (1) according to one of claims 11 to 13 and at least one main tool which can be stored on the mast (3) instead of the attachment (10), wherein the main tool preferably comprises a vibrator or a hammer. [15] Method for attaching an attachment (10) to the mast (3) of a working machine (1) according to one of claims 11 to 13, wherein the attachment (10) with its articulated deep-cutting tool (14) is placed on the ground in the area of ​​the working machine (1) via the first support feet (21, 22), wherein the attachment (10) is picked up by a lifting device or by the working machine (1) itself and attached to the mast (3), wherein, during the lifting of the attachment (10), the deep-cutting tool (14) in particular aligns itself vertically.

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