WO2023067183A1

WO2023067183A1 - Screwing-in apparatus attached to a carrier vehicle

Info

Publication number: WO2023067183A1
Application number: PCT/EP2022/079461
Authority: WO
Inventors: Günther THURNER; Martin Thurner
Original assignee: Krinner Innovation Gmbh
Priority date: 2021-10-22
Filing date: 2022-10-21
Publication date: 2023-04-27
Also published as: WO2023067182A1; DE102021127520B3

Abstract

The invention relates to a screwing-in apparatus (1) for a screw foundation (11), which apparatus is arranged on a boom (26) of a carrier vehicle (20) and can pivot via the boom (26) about a shovel pivot axis (21) disposed on a front side of the boom (26) facing the carrier vehicle (20), about a pivot axis (6) and about a fork pivot axis (7). As a result of the pivotability, the screw foundation (11) can pivot via the shovel pivot axis (21) out of a coupled position in which the pivot axis (6) is vertical into a screw-in position in which the pivot axis (6) and the fork pivot axis (7) are horizontal. The screw-in apparatus (1) has a first element in the form of a device carrier (2), which is connected to the boom (26) and by means of the pivot axis (6) carries a second element in the form of a fork (3). The fork (3) is carried by the device carrier (2) via the pivot axis (6) and carries by means of the fork pivot axis (7) a third element in the form of a rotary drive (4). The rotary drive (4) forms via an output shaft (12) a screw-in axis (5), which, in the coupled state, is aligned with the longitudinal axis of the screw foundation (11). The screw foundation (11) is screwed into the ground via this screw-in axis (5). Because of the fork, the pivot axis (6) and the fork pivot axis (7) are arranged at right angles to each other and form a central element of a cardan joint.

Description

ROLLER MOUNTED ON A CARRIER

The invention relates to a screwing device attached to a carrier vehicle, in particular to a boom thereof, for screwing screw foundations into the ground.

Both excavators and loaders or telehandlers are usually designed in such a way that different attachments can be attached using tool changing systems, so-called quick couplers, so that the carrier vehicles can be used for a wide variety of tasks. Attachments of this type also include a screwing device for screwing screw foundations into the ground.

Screwing devices which are attached to a boom arm of an excavator and can be coupled or uncoupled there by means of a quick coupling and which are provided for screwing screw foundations into the ground are known. US Pat. No. 4,199,033 describes a driving device for driving screw foundations into the ground, which is attached to an excavator arm. The screwing-in device, which has a hydraulic drive unit, is attached to the excavator boom arm, on which a clamping device for a screw foundation is located on its side facing the ground. The screw foundation is clamped in using the clamping device and screwed into the ground or unscrewed from the ground again using the hydraulic drive unit via the power supply from the excavator. The hydraulic drive unit drives the screwing device and generally drives the screw foundation into the ground in a vertical direction, with the drive axis of the hydraulic drive unit coinciding with the longitudinal axis of the screw foundation. In most cases, such a screw foundation is screwed essentially vertically into the ground. To do this, it is picked up with the screwing device attached to the boom arm and screwed into the ground when coupled to the boom. A pivot axis extends radially to the drive unit and runs through the rotary drive, by means of which the necessary energy is supplied to the screw foundation for screwing in. This pivot axis makes it possible for the screw foundation to be introduced in any direction. In the case of larger screw foundations in particular, a coupling position in which the screw foundation lies essentially in the horizontal direction on a pallet or directly on the floor is often brought into a screwed-in position in the coupled state.

In the case of the known rotary device, it is provided that the drive device can be pivoted through with respect to the attachment to the excavator arm, for which purpose the pivot axis realizing this pivotability is arranged in the upper area of the rotary drive. In the usual way, also in this state of the art, the front part of the excavator boom arm can be pivoted laterally about a further axis together with the hydraulic drive device with a clamped screw foundation. In the case of the known screwing-in device, all pivot axes are arranged on the one hand in such a way that they do not intersect. On the other hand, the pivot axis running in the radial direction of the drive unit is arranged in the upper area of the rotary device, ie relatively far away from the center of mass or from the area of the center of gravity of the rotary device. The well-known screwing device makes it possible to screw a ground screw into the ground at different angles as required. A disadvantage of this known device, however, is that although the excavator arm is deflected as much as possible, this is associated with a higher tilting moment of the screw foundation. When screwing in, the screw foundation can therefore wobble, which makes reliable and safe screwing in at a desired, defined angle more difficult.

Another disadvantage of such a known design is the fact that because the three pivot axes do not intersect with one another, a skewing torque occurs, which occurs when the excavator boom arm is pushed down by a feed force as soon as there is an axis offset of the load application point to the screw-in axis is. In such a configuration, the skewing torque therefore causes the screw foundation to be screwed in to run out of the desired screwing-in direction. An experienced excavator operator tries to compensate for this migration from the desired screwing direction. However, this means that the screwing-in process for these screw foundations depends heavily on the skill of the excavator operator, so that especially when screwing in such foundations in larger Number the accuracy of positioning the individual ground screws to each other varies undesirably.

The object of the invention is to create such an arrangement of a turning device on a carrier vehicle such as an excavator, a loader or a telescopic forklift with a corresponding suspension on the excavator boom arm so that on the one hand the turning device can be attached to the boom of the carrier vehicle as a standard attachment and that the Screw foundations can be coupled to the screwing device in a horizontal coupling position and can then be screwed into the ground with this, in particular in the vertical direction. The turning device should be designed together with the cantilever arm in such a way that the direction of turning and positioning essentially no longer depend on the skill of the driver of the carrier vehicle.

This object is achieved with a screwing-in device for screwing in a screw foundation, which is attached to a cantilever arm of a carrier vehicle and has the features according to claim 1 . Expedient developments are defined in the dependent claims.

According to the invention, a screwing device is provided on a boom of a carrier vehicle for screwing a screw foundation into the ground. The turning device is connected to the carrier vehicle, preferably in a detachable or coupleable manner. At a coupling point between the carrier vehicle and the screwing-in device, there is a bucket pivot axis that can be pivoted via the boom and is arranged on a front side of the boom that faces the carrier vehicle. The screwing device can also be pivoted about a pivot axis and a fork pivot axis, the fork pivot axis penetrating a rotary drive of the screwing device in the radial direction and being held by a fork so that the rotary drive can also be pivoted in the fork area. In particular, large screw foundations are provided on pallets in a lying position or placed on a floor surface and gripped by the screwing device. Gripping is to be understood as the coupling of the screwing-in device to the upper area of the screw foundation in a coupling position. This means that the screwing-in device is coupled to the screw foundation when the screw foundation is essentially horizontal in the coupling position. The screw foundation is then pivoted via the bucket pivot axis from a coupled position in which the pivot axis is vertical into a screwed-in position. In the screwed-in position, the pivot axis and the fork pivot axis are horizontal. Horizontal should be understood here to mean that deviations from a horizontal arrangement of up to, for example, 10 to 15 degrees, in particular up to 20°, are also understood.

The screwing device itself has three basic elements. A first element is an implement carrier, which is connected to the boom of the carrier vehicle and carries a second element, which is designed as a fork, by means of the pivot axis. The fork is carried by the implement carrier via the pivot axis and itself carries a third element by means of the fork pivot axis. The third element is the actual rotary drive, which drives the screw foundation via an output shaft, which is aligned with the screwing-in axis of the screw foundation, on the side opposite the tip of the screw foundation, so that the screw foundation can be screwed into the ground in this way in the screwed-in position in this way can. Due to the pivot axes, turning situations are possible which deviate from the vertical turning of the ground screw into the ground. According to the invention, the pivot axis and the fork pivot axis are arranged at right angles to one another due to the shape of the fork, both pivot axes forming a central member of a cardan joint. At least one of the pivot axes is preferably actively driven. The active drives ensure that the screw foundation can be screwed into the ground cleanly and with good quality without being directly dependent on the skills of the driver of the carrier vehicle.

Together with the boom of the carrier vehicle, the screwing-in device has the three elements mentioned, ie the equipment carrier, the fork and the rotary drive, which are connected to one another via two pivotable axles. A suitable carrier vehicle has a so-called bucket pivot axis in the last link of its boom, which is used to pivot a bucket or a fork or other attachments. So-called quick-change devices are often used for coupling and uncoupling the attachments, with which the corresponding working tools can be quickly coupled to the boom of the carrier vehicle or detached from it again. The bucket pivot axis is arranged on the last link of the boom. At this interface, the screwing device with its first element, the implement carrier, is attached in such a way that the screwing device can be rotated about the spoon pivot axis by means of the carrier vehicle can be pivoted so that the screwing device can be transferred from its frequently horizontal coupling position into a frequently vertical screwing-in position.

The coupling position and the screwed-in position are characterized by the relative position of the pivot axis and the fork pivot axis in space. These two axes are embodied by the second element, which is called the fork. This fork forms the central body of a universal joint known per se and defines the bearings of the pivot axis and the pivot axis of the fork, which are substantially perpendicular to each other. In a first coupling position, the pivot axis is almost vertical and thereby enables the rotation of the rotary drive so that it is aligned with the longitudinal axis of the ground screw to be screwed in when viewed from above. The fork swivel axis, on the other hand, is horizontal and thus makes it possible to move the rotary drive with its screw-in axis, which can also be referred to as the working axis, from an almost horizontal position when viewed from the side, parallel to the foundation provided on the ground, so that a coupling can be carried out. At their connection point, the device carrier and the fork are preferably connected to one another in such a way that they have an angle of inclination with respect to their respective longitudinal axis, as a result of which rotation of the rotary drive, i.e. its working axis, with regard to the device carrier or the quick-change system can be implemented more easily. This angular part of the fork is also known as a fixed crank to complement the rotation of the pivot axis.

In a first position, the coupling position, the pivot axis is almost vertical, as a result of which the rotary drive can be rotated in such a way that it is aligned with the alignment of the screw foundation, ie its longitudinal axis, in plan view. The fork pivot axis, on the other hand, is horizontal or essentially horizontal and allows the rotary drive with its screw-in axis or working axis to be moved almost horizontally from a lateral perspective for coupling to the provided foundation. In the second position, the screwed-in position, the fork pivot axis is aligned almost horizontally and compensates for the rotational movement occurring on a circular path, which results from the upward or downward movement of the boom of the carrier vehicle. In order for the rotary drive to be able to fulfill this task, it is placed in a non-driven state in the usual way, which is also referred to as a freely movable state or as a floating position. It is particularly advantageous if the fork pivot axis, viewed in the feed direction, lies directly on the screw-in axis, and therefore intersects it. With such an arrangement, it can advantageously be achieved that no additional tilting moments are exerted on the screw foundation even with high feed forces from above. In principle, the pivot axis can be used to ensure that the screw-in axis or working axis is arranged in an angular position with respect to the ground surface if a screw foundation is not to be screwed in vertically. However, the pivot axis also compensates for an inclined position of the carrier vehicle in, for example, laterally sloping terrain in the same function in this respect. So that this function can be reliably implemented, the swivel axis should be or remain almost horizontal during the entire screwing-in process. As already mentioned, horizontal means that there can be significant deviations from an exact horizontal alignment of 10 to 15 degrees or even 20 degrees. In this way, even with a corresponding lateral slope of the ground surface, complete compensation of the inclination is possible, with the limited pivoting range of the fork pivot axis not being exceeded at the same time. The pivoting range of the fork pivot axis is due to the fact that the entire screwing-in device should be of compact design in order to avoid vibrations. If the rotary drive is to pivot completely within the fork, then the fork arms would have to be relatively long, which in turn can lead to vibrations and also to possible breakage damage in continuous operation. Depending on the length of the screw foundation and the resulting necessary pivoting movement of the boom of the carrier vehicle about its boom pivot axis during the screwing-in process, it is helpful that the position of the screw-in device can be corrected about the bucket swivel axis.

According to a preferred embodiment, the fork pivot axis, preferably also the pivot axis, and the screw-in axis have a common point of intersection with one another. If there is no offset between these two axes, a skewing torque can be prevented or at least minimized. If both pivot axes, the pivot axis and the fork pivot axis intersect the longitudinal axis of the screw foundation, the skewing torque can be avoided or kept very small. More preferably, the pivot axis is driven in order to be able to actively influence the movement of the pivot axis during the screwing-in process. Preferably, the fork pivot axis is arranged in the area of the center of gravity of the rotary drive, that is, in contrast to many designs according to the prior art, placed as low as possible. In a further preferred exemplary embodiment, the fork pivot axis is a driven axis, with its drive being able to be placed in a non-driven state free of driving force. However, it is also preferably provided that both the pivot axis and the fork pivot axis are driven. This gives even better flexibility for the immediate screwing process.

The swivel axis is able to cover a swivel range of 180°, in particular 360°. Preferably, the implement carrier and the fork have a rotary union through their center, through which hydraulic pressure lines are rotatably guided to the successively arranged elements, whereby hydraulic circuits for pivoting and driving functions of the elements of the screwing device are formed.

In a special embodiment, the pivot axis runs through the center of the rotary feedthrough, with corresponding drives being arranged on its sides, each with a motor with a worm gear, so that a pivoting about the pivot axis is caused.

In a preferred embodiment, the fork pivot axis is arranged with at least one hydraulic cylinder on each side of the rotary drive, ie on each side of the fork tines of the fork.

More preferably, the fork pivot axis is equipped with a control circuit for an actively controlled movement tracking.

According to a further exemplary embodiment, in addition to the common point of intersection of the fork pivot axis and screw-in axis, the pivot axis is also arranged in such a way that it runs through this common point of intersection. In such a case, skewing torques when screwing in the screw foundation are avoided.

According to a further preferred embodiment, the fork pivot axis, relative to the longitudinal axis of the rotary drive, is arranged below its center of mass, ie in an area in which the diameter of the rotary drive is smaller towards the output side. With such an arrangement of the fork axis below the center of mass, the fork itself can be chosen to be smaller in terms of its dimensions between the two prongs, making the entire screwing device more compact and more stable, so that vibrations and damage can be reduced or even eliminated.

According to a further preferred embodiment, the axes that make the various movements and settings of the turning device flexible with regard to its attachment to the boom arm of the carrier vehicle, with the bucket pivot axis running in the area of the quick-change coupling, the turning axis, the fork pivot axis, the pivot axis and the bucket pivot axis, based on the ground surface viewed in the direction of the boom, are sequentially arranged one above the other.

Further advantages, features and possible applications of the present invention will now be described using further exemplary embodiments with reference to the accompanying drawings. Show in the drawing:

Figure 1: A carrier vehicle in the form of an excavator coupled with

Screw foundation in screwed position;

FIG. 2: one end of a cantilever arm of the carrier vehicle and screwing-in device in the uncoupled state;

FIG. 3a: an implement carrier, a fork and a rotary drive as essential elements of the screwing-in device according to the invention;

FIG. 3b: the screwing-in device with the three elements according to FIG. 3a in the assembled state;

Figure 3c: the screwing device according to Figure 3b in two side views and in

Top view;

FIG. 4: a side view of the carrier vehicle with the boom attached

Screwing device with screw foundation in screwing position during the different phases of screwing the screw foundation into the ground;

FIG. 5: an illustration of the screwing-in device mounted on the boom with illustrated compensation for an inclination of the carrier vehicle on sloping terrain;

Figure 6: an illustration of the screwing device on the cantilever arm of the

Screw-in device mounted on the carrier vehicle in the coupling position of the screw foundation;

FIG. 7: a carrier vehicle in the form of a skid steer loader with the option of attaching a screwing device according to the invention; and FIG. 8: a carrier vehicle in the form of a telescopic forklift with the option of attaching a turning device according to the invention.

Figure 1 shows a three-dimensional view of a carrier vehicle in the form of an excavator with a screwing device 1 arranged at the front end of a dipperstick 25 of a boom arm 26. The screwing device 1 is aligned in such a way that the previously coupled screw foundation 11 in its screwed-in position or screwed-in position with the screwing device 1 is coupled. The screwing device 1 has three essential elements, namely a device carrier 2, a fork 3 and a rotary drive 4. The screwing axis 5 (not shown) is aligned with the longitudinal axis of the screw foundation 11. The device carrier 2 of the screwing device 1 is the counterpart to the quick coupler for a Working device which, in the present case, connects the turning device 1 to the dipper stick 25 of the boom arm 26 of the drive vehicle in the sense of a quick coupling. In the usual way, the carrier vehicle 20 is provided with an upper structure 27, a driver's cab (not designated) and the boom arm 26 with the dipper stick 25 and the quick-change system 24 or implement change system at its front end. In addition, the excavator 20 has a clearing blade, which is arranged on its front side in the area in front of the deflections of the chain drives.

Due to the mobility of the screw-in axis 5, the fork swivel axis 7, the swivel axis 6 and the bucket swivel axis 21, it is possible to pick up the ground screw 11 from a horizontal coupling position placed on the ground surface and screw it into the ground in any position. As a rule, the screw foundation is intended to be screwed into the ground from its screwed-in position perpendicular to the ground surface.

FIG. 2 shows a side view of the assembled screwing device 1 in the tool changing system 24, which is not attached to the front end of the dipper stick 25, for connection to a working device, which in the present case is the screwing device 1. The movably mounted dipper stick is shown on the boom of the carrier vehicle 20 (not shown). The driving device 1 according to the invention has three essential elements, namely the tool carrier 2, which is provided for coupling to the tool changing system 24 at the front end of the dipper stick 25, a fork 3, which is connected to the fork base with the tool carrier 2 and to the front , The end forming the actual fork is attached to the outer circumference of the rotary drive 4, and a rotary drive 4 received between the forks Fulfillment of the numerous functions for picking up, i.e. coupling, the ground screw 11 to the screwing device 1, turning the screwing device 1 into the screwing-in position and finally moving the screwing device 1 together with the movement of the boom 26 or dipper handle 25 for screwing in the screw foundation 11 (Not shown) in the ground several pivot axes are required. At the front end of the dipper stick 25 in the area of the implement changing system 24, a bucket pivot axis 21 is shown, around which, when the screwing device 1 is coupled to the implement changing system 24, the screwing device 1 can be pivoted completely in the sense of a conventional quick coupler. The tool carrier 2 has a cylindrical rotary feedthrough 13 which is arranged at an angle between the flank on which it is connected to the fork 3 and the end opposite thereto, pointing in the direction of the front end of the dipper handle 25 . In this intermediate area, which is also referred to as a crank, it forms an angle a, which serves to enable the pivot axis 6, which runs in the center of the fork 3 and in the center of the rotary bushing 13 of the device carrier 2, to be pivoted more easily into the vertical can. The fork 3 itself encompasses the outer circumference of the rotary drive 4 and at this pivot point forms a fork pivot axis 7 running radially through the rotary drive 4. In this exemplary embodiment, the fork pivot axis 7 is perpendicular to the pivot axis 6, so that a cross is formed when viewed from above. Such a cross in plan view is given by the fact that the bucket pivot axis 21 and the pivot axis 6 are also arranged perpendicular to one another in space. And finally, for a vertical screwing-in process of a screw foundation 11 (not shown), a screw-in axis 5 is provided, which can also be referred to as a working axis 5, which is aligned perpendicularly to the fork pivot axis 7. From this representation of the screwing device 1 it is clear about which axes a mobility of the screwing device 1 or the elements of the screwing device 1 is possible. On the one hand, the entire turning device 1 can be pivoted about the spoon pivot axis 21 . Furthermore, pivoting about the pivot axis 6 is possible, as a result of which the fork 3 and the rotary drive 4 move in rotation relative to the equipment carrier 2 . And finally, the rotary drive 4 can be pivoted about the fork pivot axis 7, whereby in the illustrated embodiment both the pivot axis 6 and the fork pivot axis 7 and the spoon pivot axis 21 are each active axes, which of course also applies to the screw-in axis 5, which is controlled by the rotary drive 4 is driven and by means of which the ground screw 11, not shown in FIG. 2, is screwed into the ground or screwed out of it again. FIG. 3a shows the three essential elements of the screwing device 1. The three basic elements of the screwing device 1 are the equipment carrier 2, the fork 3 and the rotary drive 4. These three elements are shown in FIG. 3a in the exploded state. The device carrier 2 positions the seat of the pivot axis 6 by means of a corresponding offset, which forms an angle a, so that the entire screwing-in device 1 can be pivoted about the spoon pivot axis 21 in the desired manner for aligning the screw foundation 11 to be screwed into the ground in any desired position .

The fork 3 has a base from which forks protrude in the vertical direction, which are flanged to pins on the outer circumference of the rotary drive 4 so that the rotary drive 4 can be pivoted about the fork pivot axis 7 relative to the fork 3 . The pivot axis 6 is thus structurally fixed at right angles to the fork pivot axis 7 . Also shown are two hydraulic cylinders 10, by means of which active tilting about the fork pivot axis 7 can be implemented. The fork 3 can also be pivoted via the pivot axis 6, so that the entire rotary drive 4 can be pivoted by pivoting the fork 3 about the pivot axis 6, in particular in a horizontal alignment with respect to the longitudinal axis of the screw foundation 11, namely when the screw foundations, for example be provided on a pallet on the ground in order to then be able to swivel them into a vertical position. In this vertical position, the screw foundation 11 can be pivoted into the screwed-in position with an output shaft of the rotary drive 4 designed as a clutch.

And finally, the rotary drive 4 is shown as the third element, which has the already mentioned pins on its outer circumference as a counterpart to the fork 3, around which the fork 3 and the rotary drive 4 can be pivoted relative to one another about the fork pivot axis 7. The fork pivot axis 7 and the screw-in axis 5 intersect at right angles. The actual rotary drive 4 drives the screw-in axis 5 or working axis 5 by means of a motor with an upstream planetary gear, which is arranged in the housing of the rotary drive 4 and is therefore not shown separately.

For reasons of clarity, the screwing device 1 according to the invention is shown in the assembled state in a three-dimensional representation in FIG. 3b. The basic structure corresponds to that of the three essential elements of the screwing device according to the invention shown in FIGS. 1 to 3a. With this screwing device 1 It is a screwing-in device which enables active pivoting of the pivot axis 6, the fork pivot axis 7 and the spoon pivot axis 21, which is not shown here in FIG. 3b. According to this exemplary embodiment, the pivoting about the pivot axis 6 is brought about by motors arranged laterally to the base area of the fork 3 , which activate the screwing device 1 about the pivot axis 6 via worm gears.

FIG. 3c shows a front view, a side view and a top view of the screwing-in device 1 according to the invention. The screwing device 1 is shown in the assembled state and has the three elements, device carrier 2, fork 3 and rotary drive 4 with the respective pivot axes, specifically in the basic structure as shown in FIG. 2 and described for this figure.

FIG. 4 shows a basic representation of the screwing-in process for a screw foundation 11 by means of a carrier vehicle 20 in the form of an excavator. The excavator 20 has, in a conventional design, an upper structure 27, a driver's cab, a boom 26 with a dipper stick 25 articulated thereto via a dipper stick pivot axis 22, at the front end of which there is a tool changing system 24 for coupling an implement, in the present case a screwing-in device 1, such as attached or coupled that the device changing system 24 can be positively locked to the device carrier 2 in the sense of a quick coupling. The spoon pivot axis 21 is provided on the implement carrier 2 so that it is possible to pivot the entire screwing device 1 about this spoon pivot axis 21 if necessary. The boom 26 is pivoted about a boom pivot axis 23 in the area of the driver's cab from an uppermost position to a lowermost position, in which the ground screw 11 is screwed into the ground. An intermediate position is shown in dashed lines. The screwing device 1 is now lowered when lowering the boom 26 with the dipper stick 25 such that it is lowered perpendicular to the ground on the screwing axis 5, which coincides with the longitudinal axis of the screw foundation 11, and can be screwed in there. The dipper stick 25 can be pivoted relative to the boom 26 by means of a dipper stick pivot axis 22 . Through the interaction of boom 26 and dipper stick 25 in connection with the dipper stick pivot axis 22 and the boom pivot axis 23, a linear movement of the ground screw 11 to be screwed in along the screw-in axis 5 can be realized. The bucket pivot axis 21 is blocked so that it does not change its pivot position during the pivoting of the boom 26 together with the dipper stick 25 . According to the invention, the pivot axis 6 is aligned essentially horizontally during the screwing-in process. “Essentially horizontal” in this application means that, as shown in FIG. 4, the pivot axis 6 can deviate from the exact horizontal line by +/- 20 to 25°. All this should still be understood in the sense of horizontal. At the beginning of the screwing-in process or the lowering of the screw foundation 11 into the screwing-in position, the pivot axis 6 points slightly upwards, then when the boom 26 and the dipper stick 25 are lowered, it approaches the actual horizontal level in order to, with the foundation screwed in, into a slightly inclined position i.e. to get into a sub-zero deviation from the horizontal. If the swivel range around the fork swivel axis 7 should be used up, a corrective movement around the bucket swivel axis 21 must be carried out during the screwing-in process. If the pivoting range is not completely used up, the bucket pivot axis 21 remains blocked, as shown in FIG.

FIG. 5 shows that the inclination of the ground screw 11 with respect to the ground surface, which is made possible by using the actively driven pivot axes 6, 7, 21, is possible in any direction and can also be used when a carrier vehicle 20 is also inclined on a sloping ground surface. On such an inclined ground surface, the turning device 1 would therefore be turned perpendicularly to the inclined surface, but not in the direction of the center of the earth. The compensation of the slope of the terrain can now be achieved with the actively driven axles. Because the compensation for the slope of the terrain corresponds to an inclined, that is not taking place at right angles to the ground surface, turning of the ground screw 11 into the ground in the case of uneven terrain.

FIG. 6 shows a screwing device 1 pivoted into the horizontal, which corresponds to the coupling position in which horizontal screw foundations 11 lying on the ground or delivered on a pallet can be coupled to the screwing device 1 . For this purpose, the existing pivot axes 6, 7, 21 are positioned in interaction with the offset a (see FIG. 2). The structure and the linkage of the driving device 1 on the dipper handle 25, the possibility of rotation about the spoon pivot axis 21, about the fork pivot axis 7 and about the pivot axis 6 in connection with the three elements of the driving device 1, implement carrier 2, fork 3 and rotary drive 4 in connection with the Screw-in axis 5 have already been described in the previous figures and are therefore not described again here. FIG. 7 describes a carrier vehicle 20 in the form of a skid steer loader. This skid steer loader also has a boom 26 which, at its front, angled end, has an axis 21, also referred to as a bucket pivot axis, although the basic structure does not have a dipper stick. The boom 26 can also be pivoted about a boom pivot axis 23 . It can be seen from Figure 7 that the pivoting movement of a turning device 1 attached instead of a shovel can be transferred from a high position to a low position, with this being accomplished in the compact loader according to Figure 7 by boom 26 by rotating about pivot axis 21. The compensation of the unwanted horizontal component or the deviation from a straight turning line of the ground screw 11 is realized by driving the carrier vehicle 20 in the compensation direction by means of the compensation movement 28 of the carrier vehicle 20 . A quick-change device is also indicated, which is used to couple the turning device 1 according to the invention to such a compact loader in the manner via a quick-change system, as has been described above in connection with a carrier vehicle 20 in the form of an excavator.

In Figure 8, a carrier vehicle 20 is described in the form of a telescopic forklift, in which the boom 26 can be adjusted telescopically in the longitudinal direction, so that in connection with the pivot axis 21 and attachment of a screwing device instead of a forklift fork on the boom 26 with the screwing device 1 according to Invention, a screw foundation can be introduced into the ground in the manner described. The jib 26 can be swiveled via a jib swivel axis 23 from an upper position into a lower position up to the screwing depth of the screw foundation 11 . If the telescoping extension or shortening of the extension arm is not used when the extension arm 26 is pivoted from an upper position to a lower position, it is not possible to achieve a straight turning curve for a screw foundation 11 , this undesirable horizontal component would have to be compensated for by telescoping the extension arm 26 in the compensation direction 28 done. Furthermore, the pivot axis 21 can be used so that a screw foundation can be transferred from a coupling position into a screwing-in position by means of the cantilever arm 26 . Reference sign

1 screwing device

2 equipment carriers

3 fork

4 rotary drive

5 turning axis (axis around which the foundation is rotated)

6 pivot axis

7 fork pivot axis

8 slewing drive

9 drive motors for swivel drive

10 hydraulic cylinders for fork pivot axis

11 screw foundation

12 output shaft

13 swivel

20 carrier vehicle (excavator, loader, telehandler)

21 Bucket pivot axis

22 dipper pivot axis

23 boom pivot axis

24 tool changing system

25 Dipperstick

26 outriggers

27 superstructure

28 Compensation movement carrier vehicle

Claims

CLAIMS Screwing device (1) attached to a carrier vehicle (20) having a boom (26) for driving a screw foundation (11) into the ground, which is connected to the carrier vehicle (20) and via the boom (26) about a bucket pivot axis (21). , which is arranged on a front side of the boom (26) facing the carrier vehicle (20), can be pivoted about a pivot axis (6) and a fork pivot axis (7), the screw foundation (11) being made of a Coupled position in which the pivot axis (6) is vertical, can be pivoted into a screwed-in position in which the pivot axis (6) and the fork pivot axis (7) are horizontal, and a first element in the form of an equipment carrier

(2) which is connected to the boom (26) and by means of the pivot axis (6) a second element in the form of a fork

(3), which is carried by the equipment carrier (2) via the pivot axis (6) and, by means of the fork pivot axis (7), carries a third element in the form of a rotary drive (4) which, via an output shaft (12), has a turning axis (5) which, when coupled to the screw foundation (11), is aligned with its longitudinal axis and via this (5) screws the screw foundation (11) into the ground, characterized in that the pivot axis (6) and the fork pivot axis (7) are at right angles due to the fork to each other and form a central link of a cardan joint. Screwing device according to claim 1, characterized in that at least one of the pivot axes (6, 7) is actively driven. Driving device (1) according to Claim 1 or 2, characterized in that the fork pivot axis (7) and the driving axis (5) have a common point of intersection.

4. Driving device (1) according to one of claims 1 to 3, characterized in that the driving device (1) couples the ground screw (11) in its horizontal coupling position and turns it vertically into the ground surface.

5. Driving device (1) according to claim 2, characterized in that the pivot axis (6) is driven and the fork pivot axis (7) runs in the area of the center of gravity of the rotary drive (4).

6. Screwing device (1) according to any one of claims 2 to 4, characterized in that the fork pivot axis (7) is driven and the drive can be placed in a non-driven state free of driving force.

7. Screwing device (1) according to claim 5, characterized in that the fork pivot axis (7) is driven.

8. Screwing device (1) according to one of claims 1 to 7, characterized in that the pivot axis (6) covers a pivoting range of 180°, in particular 360°.

9. Driving device according to claim 8, characterized in that the equipment carrier (2) and the fork (3) have a rotary bushing (13), through the center of which runs the pivot axis (6) and through which hydraulic pressure lines to the respective following element (3 , 4) which form hydraulic circuits for swivel and drive functions.

10. Driving device (1) according to any one of claims 1 to 9, characterized in that the pivot axis (6) by means of a pivot drive (8) having at least one motor with a worm gear can be pivoted.

11. Screwing device (1) according to one of claims 1 to 10, characterized in that the fork pivot axis (7) can be pivoted by means of at least one hydraulic cylinder (10).

12. Screwing device (1) according to one of claims 1 to 4, characterized in that the fork pivot axis (7) has an actively controlled movement tracking via a control loop.

13. Screwing device (1) according to any one of claims 1 to 3, characterized in that the pivot axis (6) runs through the common point of intersection. 18

14. Screwing device (1) according to any one of claims 1 to 4, characterized in that the fork pivot axis (7) runs below the center of mass of the rotary drive (4).

15. Driving device (1) according to one of claims 1 to 4, characterized in that the bucket pivot axis (21) runs above a quick-change coupling arranged on the front side of the boom (26) and the driving axis (5), the fork pivot axis (7), the pivot axis (6) and the bucket pivot axis (21) are arranged one above the other one after the other from the ground surface in the direction of the boom (26).