EP3587337A1 - Telescopic boom bracing device - Google Patents

Abstract

The invention relates to a telescopic boom guy unit for a mobile crane, with
- A holding frame (10) designed for attachment to the telescopic boom of the mobile crane with an open cross-section, the cross-sectional opening of which enables the boom (3) to be inserted into the holding frame (10); and
- Two guy supports (11) connected from the holding frame (10) to form a structural unit; wherein two frame parts (101, 102) forming the open cross section of the holding frame (10) are movably coupled to one another via a coupling point (19). The invention further relates to a corresponding guy unit transport system, a corresponding mobile crane and a corresponding set-up method.

Description

The invention relates to the technical field of guying in telescopic cranes, in particular in mobile cranes.

Guy systems are used on cranes or telescopic cranes to increase the load capacity of the jib or its stability or rigidity. In many cases - as with the present invention - the guy device is provided as an integral unit and is also referred to as a "guy stand". It has erectable guy supports and a holding frame for attachment to the crane boom. Ropes are tensioned to the boom head via the guy supports, some of which absorb the forces acting on the boom and thus provide relief or an improvement in rigidity. The guy supports are fastened via guy members in the area of the boom rotation axis.

With larger mobile cranes, the dimensions and weight of the guy unit also increase, so that it cannot be preassembled on the jib when the crane is being transported to the place of use, since otherwise height and / or weight restrictions would not be met. In these cases, the guying unit is brought separately to the place of use.

Different solutions are known from the prior art in order to equip the guy device on the crane or crane boom, which is transported separately to the place of use. For example, the EP 1342692 A2 before transporting the guy device in two parts and placing these parts individually on the crane undercarriage for setup. However, this approach is comparatively complex since the individual parts of the guy device have to be handled separately. This is how it beats EP 1735233 A1 before, the whole To design anchoring device as a structural unit, which can be lifted as part of the transport vehicle by the crane on site. In order to equip the anchoring device on the boom, it is placed on the ground in a raised position by means of a support frame, so that the crane boom can be inserted under the anchoring device and the anchoring device can be mounted on the boom from above. For this solution, however, a support frame for the guying device must be provided, the retraction of the boom under the guying device being an additional step. The EP 2248754 A1 therefore proposes to set down the guy device as a structural unit directly on the crane undercarriage in order to mount the guy device "from below" on the jib after the jibing or bobbing. Since with this solution the luffing cylinder (s) have to be guided past the guy supports, the width of the guy device must not exceed a certain value due to the approval regulations for road transport, this solution has strict limits with regard to the geometry of the guy device and the boom including its luffing mechanism set.

It is the object of the present invention to provide an anchoring device for a mobile crane telescopic boom which can itself be easily set up and yet meets the geometric requirements for road transport even with larger mobile cranes.

This object is solved by the subject matter of claims 1 and 13 to 15. The subclaims define preferred embodiments of the present invention.

The telescopic boom guy unit according to the invention accordingly comprises a holding frame designed for attachment to the telescopic boom of the mobile crane with an open cross-section, the cross-sectional opening of which enables the boom to be inserted into the holding frame, and two guy supports connected by the holding frame to form a structural unit. Two frame parts forming the open cross section of the holding frame can be moved relative to one another via a coupling point coupled to each other.

In other words, the holding frame, by means of which the guy supports are fastened to the boom, has a substantially U-shaped cross section, so that the boom for setting up the guy device is introduced into the latter by a rocking movement over the opening of the U-shaped holding frame and the latter can ultimately be bolted to the boom. The open cross section is formed by at least two, in particular by exactly two frame parts that are movable relative to one another, but nevertheless form a structural unit. For example, the profile cross section of the holding frame can be varied by the movement of the frame parts relative to one another, so that different profile cross sections of the holding frame can be achieved by different positions of the frame parts relative to one another, which in turn meet different geometrical requirements for the guying unit. The holding frame can extend essentially in a plane that perpendicularly intersects the longitudinal axis of the boom retracted into the holding frame. The movement of the frame parts relative to one another can also take place in this plane.

For example, the opening width of the open cross-section can be changed by moving the frame parts relative to one another. In other words, the frame parts can be moved relative to one another in such a way that the opening available for moving the boom into the holding frame is widened or narrowed again. Since the position of the two guy supports is determined by the position of the respective frame parts of the holding frame, the width between the guy supports of the guy device as a whole is thus influenced.

On the other hand, a change in the overall width of the guy unit can also be achieved by moving the frame parts relative to one another. For example, the holding frame can be designed in such a way that the width of the holding frame and thus also the entire guying unit is varied by moving the frame parts relative to one another.

For example, the coupling point can rotationally couple the respective frame parts of the holding frame to one another. For example, the frame parts can be connected to one another via a swivel joint, the axis of rotation of which runs in particular parallel to the longitudinal axis of the boom retracted into the holding frame. Furthermore, the coupling point can also translate the respective frame parts to one another, so that they can be displaced relative to one another, for example via a rail-like guide. It is also conceivable that the coupling point enables a combined rotational / translational movement of the respective frame parts relative to one another. The coupling point can also lie essentially on the plane of symmetry of the holding frame, so that the holding frame has an essentially symmetrical cross section in each position of the frame parts.

In order to cause the frame parts to move relative to one another, the bracing unit can have at least one electrically, mechanically or hydraulically driven actuator, by means of which the frame parts of the holding frame are moved relative to one another, in particular rotated relative to one another and / or displaced relative to one another. For example, frame parts coupled to one another in a translatory manner can be connected via a hydraulic cylinder, a rack and pinion drive, an electric or hydraulic motor or the like. can be shifted relative to one another in order to vary the opening width of the open frame cross section and / or to change the overall width of the holding frame or the guy unit. It is also conceivable that a hydraulic movement of the frame parts relative to one another is effected by means of a hydraulic cylinder or an electric or hydraulic motor arranged in the region of the axis of rotation. There is also the possibility that the frame parts are moved towards each other by an "external" drive, such as a drive on the crane undercarriage or on the transport unit / low loader.

According to a further embodiment of the guy unit according to the invention, the holding frame can also be designed such that the opening of the open Cross-section automatically, ie automatically widened as soon as it is lifted by the crane. This automatic or automatic expansion can also take place when the guying unit is in a remote resting position, in particular when it is set down on the crane undercarriage for set-up. The efforts of the guy unit to expand as soon as it is attached to the crane's load hook or set down on the crane undercarriage can be achieved by a suitable choice of the frame geometry and the position of the respective focal points of the frame parts and their supports.

According to one embodiment of the present invention, the transfer of the frame cross-section from an expanded position back into a position in contact with the cross-section of the boom can be effected by the boom being moved into the holding frame by a rocking movement. As soon as the boom presses on the swivel, for example, the frame parts automatically rest against the profile of the boom when the boom is retracted, so that the guying unit can be bolted to the boom in a subsequent step.

Basically, it is conceivable that the guy unit according to the invention is mounted on the boom with a variable holding frame profile "from above". However, as will be shown later, the present invention also enables "from below" to be set up, in that the boom is retracted into the holding frame by rocking the boom out or out. While in the first case a holding frame is necessary to be able to lower the guy unit in an elevated position so that the boom can be placed under the guy unit for set-up, in the second case the guy unit can be placed directly on the crane undercarriage.

In order to be able to position the guying unit on the crane undercarriage in a defined set-up position, the guying unit can have defined supports, which then function as a kind of positioning aid. In addition, by means of a suitable positioning of these supports, the holding frame can be achieved or the tensioning unit automatically opens or expands in a remote idle state due to its own weight.

Although it has always been assumed in the previous examples that the guy unit will be disassembled for road transport, it is still conceivable that it will be placed on the crane undercarriage during transport or even bolted to the jib of the mobile crane, provided that in these cases the Regulations for road transport are observed.

Another aspect of the present invention relates to a guying unit transport system which, in addition to the guying unit described here, also comprises a transport vehicle designed to transport this guying unit.

While the guy unit can be designed to expand automatically, especially when it is in a resting position on the crane undercarriage, it can, in combination with the designated transport vehicle, endeavor in a very similar way to reduce its overall width when it is set down on the transport vehicle , This not only ensures that the maximum width permitted for road transport is not exceeded, but that the transport vehicle is as narrow as possible.

Another aspect of the present invention relates to a telescopic crane, in particular a mobile crane, with an uppercarriage rotatably arranged on an undercarriage with a telescopic boom comprising a plurality of telescopic sections, and with an anchoring unit as described here.

Another aspect of the present invention relates to a set-up method for the telescopic boom guy unit according to the invention, according to which a guy unit transported separately from the mobile crane is lifted from the transport vehicle and placed on the undercarriage of the mobile crane, whereupon the boom is lifted by a Rocking movement is retracted into the holding frame and bolted to it.

Figur 1:

Eine auf einem Transportfahrzeug abgesetzte Abspanneinrichtung;

Figur 2:

Eine am Kran-Lasthaken angehängte Abspanneinrichtung;

Figur 3:

Kran mit einer auf dem Kranunterwagen abgesetzten Abspanneinrichtung;

Figur 4:

Abspanneinrichtung in einer aufgewarteten Ruheposition auf dem Kranunterwagen;

Figur 5:

Einen in den Halterahmen eingefahrenen Ausleger;

Figur 6:

Einen mit dem Ausleger verbolzte Abspanneinrichtung;

Figur 7:

Eine erste Ausführungsform der Abspanneinrichtung in einer Transportstellung;

Figur 8:

Abspanneinrichtung aus Figur 7 in einer aufgeweiteten Ruheposition;

Figur 9:

Abspanneinrichtung aus Figur 7 in einer dem Auslegerprofil entsprechenden Normalposition;

Figur 10

Eine zweite Ausführungsform der Abspanneinrichtung in einer Transportstellung;

Figur 11:

Abspanneinrichtung aus Figur 10 in einer aufgeweiteten Ruheposition;

Figur 12:

Abspanneinrichtung aus Figur 10 in einer dem Auslegerprofil entsprechenden Normalposition.

The invention is explained in more detail below on the basis of an embodiment and by means of the accompanying drawings. It can include all of the features described herein individually and in any meaningful combination. The drawings show:

Figure 1:

An anchoring device placed on a transport vehicle;

Figure 2:

An anchoring device attached to the crane load hook;

Figure 3:

Crane with anchoring device placed on the crane undercarriage;

Figure 4:

Guy device in a waiting resting position on the crane undercarriage;

Figure 5:

A boom retracted into the holding frame;

Figure 6:

An anchoring device bolted to the boom;

Figure 7:

A first embodiment of the guying device in a transport position;

Figure 8:

Guy device off Figure 7 in an expanded rest position;

Figure 9:

Guy device off Figure 7 in a normal position corresponding to the boom profile;

Figure 10

A second embodiment of the guying device in a transport position;

Figure 11:

Guy device off Figure 10 in an expanded rest position;

Figure 12:

Guy device off Figure 10 in a normal position corresponding to the boom profile.

The Figure 1 shows a guy unit 9 transported separately from the rest of the mobile crane on a low loader 8 according to the present invention. The Anchoring unit 9 takes up a position on the low loader 8 in which it has a smaller overall width than in a position bolted to the boom 3 or even set down on the crane undercarriage 1. The Figure 7 illustrates how the smaller width of the guy unit 9 can be achieved, namely by turning the two frame parts 101 and 102 around the swivel joint 19, so that the latter is in a lower position than the frame parts 101 and 102 than in a normal position.

The Figure 2 shows a perspective view of the guy unit 9 according to the invention, which essentially consists of two symmetrically arranged guy supports 11 and the associated holding frame 10. The holding frame 10 is divided into two frame parts 101 and 102, which can be rotated relative to one another about the central pivot joint 19. Im in the Figure 2 shown state of the guy 9 is attached to a crane hook 30 by means of the stop means 21. The sling means or ropes 21 act in the area of the swivel joint 19 and the support supports 17, so that the anchoring device 9 expands automatically due to its own weight, so that the frame parts 101 and 102 are rotated about the swivel joint 19 so that it is relatively to the frame parts 101 and 102 comes to lie in a higher position than in a normal position of the holding frame 10. The guy supports themselves are designed in a manner already known. Specifically, they each have a winch 16 for the bracing of the boom and are erected by means of the erecting cylinders 12 in the boom-luffing plane and also brought back after use, while they also and out of the boom-luffing plane by means of the respective pivoting brackets 13 and pivoting cylinders 14 can be brought back into them. Thus, the guy supports 11 can assume a so-called V or Y position, the boom guying also being able to absorb lateral loads, such as wind loads on the crane boom 3.

The Figure 3 shows the next step in setting up the guy device 9 according to the invention, in which it is placed in the front area of the crane undercarriage 1. It becomes clear that the positioning of the guy unit 9 on the crane undercarriage 1 can be carried out independently by the mobile crane that no separate hoist has to be provided.

The Figure 4 shows the anchoring unit 9 already positioned on the crane undercarriage 1, whereby it should be noted that the supports 17 and 18 of the anchoring unit 9 come to rest in defined areas of the crane undercarriage 1 in order to be able to bolt the anchoring unit 9 to the boom 3 as soon as it is in the holding frame 10 or its frame parts 101 and 102 has been retracted. In the embodiment shown, the holding frame 10 is bolted to the collar 6 of the base body 4. For this purpose, the boom 3 must be lowered (rocked or rocked) into a substantially horizontal position, so that the collar 6 moves into the holding frame 10 and comes to rest in it. An essential aspect of the present invention is that Figure 4 also see: like the previous ones Figures 1 to 3 can be seen, the guy supports 11 of the guy device 9, which is separate from the rest of the mobile crane, are aligned parallel to one another. In the case of a rigid holding frame 10 with an open cross-section that is invariable in its profile, the space available between the guy supports 11 is therefore directly dependent on the distance between the upper ends of the U-shaped holding frame. If more space was required to move the boom 3 in and out of the holding frame 10, this was previously only possible by increasing the overall width of the holding frame 10. However, this, like the entire guy device 9 itself, must not exceed a given maximum width when transported separately from the mobile crane on a low loader 8. For large mobile cranes with correspondingly large jib cross-sections, it has so far been hardly possible, as with cranes with double luffing cylinders that extend beyond the lateral width of the jib 3, to implement a guy unit 9 that can be equipped "from below" on the jib 3. Again Figure 4 can be removed, the widening of the holding frame 10 and thus also the entire guy unit 9 additionally enables the rocker cylinders arranged on both sides of the boom 3 to be easily guided past the guy supports 11.

As soon as the luffing cylinders are guided past the guy supports 11 and the boom 3 or the collar 6 of the outermost telescopic section 4 is immersed in the holding frame 10, the guy supports 10 can again be attached to the boom 3 can be brought up by the frame parts 101 and 102 resting on the extension arm or the collar 6. In the example shown, this is achieved in that the collar 6 runs onto the centrally located swivel joint 19 and presses it downward. The supports 18 which are present on both sides of the holding frame 10 and support them roll on the crane undercarriage 1 and thus enable the respective frame parts 101 and 102 resting on the crane undercarriage 1. The same applies to the supports 17 below the guy supports 11, in the example shown the supports 18 on the crane undercarriage 1 additionally take on the function of guiding the holding frame 10 when it is placed on the boom 3 on the crane undercarriage 1. For this purpose, a rail-like guide structure 20 ( Figure 4 ) is provided, which enables the supports 18 to roll, but prevents them from moving in the longitudinal direction of the crane. For example, this can be done by one or more grooves and / or rails transverse to the longitudinal direction of the crane, in which the supports 18 are held by the weight of the anchoring device 9, even if they roll on the superstructure 1. In the case of frame parts 101 and 102 which are translationally displaceable relative to one another, the guide structure 20 can be adapted to the translational instead of the rotational movement in an equivalent manner. In general, the guide structure 20 can allow the frame parts 101 and 102 or their supports 18 to move during set-up, but can prevent a movement in the longitudinal direction of the crane. Such a guide structure can also be provided for the rear supports 17. Since, in the embodiment shown, they rest on the crane undercarriage 1 at substantially the same point when they are unrolled, the guide structure there can take the form of an indentation or recess on the crane superstructure 1, which prevents the respective supports 17 from translatory movement in any horizontal direction. If such a translatory movement, for example in the transverse direction of the crane, is desired, the guide structure for the rear supports 17 can of course also have rails or grooves, as have already been described for the front guide structure 20.

The Figure 6 shows the holding frame 10 of the guy unit 9 according to the invention in a state applied to the boom 3, in which the holding frame 10 can be bolted to the collar 6 of the outermost telescopic section 4 by activating the locking cylinders 15.

The in the Figures 7 to 9 The cross sections of the different positions of the frame parts 101 and 102 in relation to one another illustrate the advantages of the present invention: Figure 9 shows a normal position of the frame parts 101 and 102 relative to each other, in which the holding frame 10 rests on the outer circumference of the boom 3 or on the collar 6 and can be bolted to it. In this position, it is not possible to move the boom 3 in and out of the holding frame 10 because the available opening width D6 is not sufficient for this. It is also possible that the in the Figure 9 visible width D3 exceeds a permissible maximum value for road transport.

The present invention alleviates both problems in that the frame parts 101 and 102 are pivoted relative to one another via the central pivot joint 19. It is thus possible, on the one hand, to widen the opening width of the holding frame 10 which is relevant for the retraction and retraction, to a larger distance D5. The width D2, which is also enlarged compared to the width D3 of the normal position, is irrelevant, since this position is only assumed at the place of use when the mobile crane is being set up. For road transport, the frame parts 101 and 102 of the embodiment shown are pivoted to one another in the opposite direction, so that the overall width D1 of the guy device 9 assumes a value that is permissible for road traffic and smaller than the overall width D3 of the normal position. The opening width D4, which is reduced compared to the normal position, is again irrelevant in the transport state.

The Figures 10 to 12 show an embodiment of the guy device 9 according to the invention, in which the frame parts 101 and 102 are not as in the in the Figures 7 to 9 to be seen embodiment are rotated relative to each other, but translatory. This translatory movement in the horizontal direction is brought about by an actuator 21, which in the Figure 12 is shown schematically as a hydraulic cylinder, but may also include a rack drive or similar means suitable for a translational movement. While the Figure 10 a transport position with reduced widths D1 and D4 (corresponding to that in the Figure 7 shown rotary position), shows the Figure 11 a set-up position with extended widths D2 and D5 (corresponding to that in the Figure 8 shown rotary position) and the Figure 12 a working position of the frame parts 101 and 102 (corresponding to that in the Figure 9 shown rotary position), wherein the frame parts 101 and 102 can be bolted to the crane boom 3 in the latter position.

Claims (15)

Telescopic boom guy unit (9) for a mobile crane, with - A holding frame (10) designed for attachment to the telescopic boom of the mobile crane with an open cross-section, the cross-sectional opening of which enables the boom (3) to be inserted into the holding frame (10); and - Two guy supports (11) connected from the holding frame (10) to form a structural unit; characterized in that two frame parts (101, 102) forming the open cross section of the holding frame (10) are coupled to one another via a coupling point (19). Guying unit according to claim 1, wherein the frame parts (101, 102) are coupled to one another in such a way that a movement of the frame parts (101, 102) relative to one another causes a change in the opening width (D4-D6) of the open cross section. Anchoring unit according to one of claims 1 or 2, wherein the frame parts (101, 102) are coupled to one another in such a way that a movement of the frame parts (101, 102) relative to one another causes a change in the overall width (D1-D3) of the anchoring unit (9). Tensioning unit according to one of claims 1 to 3, wherein the frame parts (101, 102) are rotationally coupled to one another via the coupling point (19), in particular by means of a swivel joint (19), the axis of rotation of which runs in particular parallel to the longitudinal axis of the boom (3). Bracing unit according to one of claims 1 to 4, wherein the frame parts (101, 102) are translationally coupled to one another via the coupling point (19), in particular by means of a rail-like guide. Tensioning unit according to one of claims 1 to 5, wherein the movement of the frame parts (101, 102) is supported by an actuator, in particular is effected, in particular by means of at least one hydraulic cylinder. Anchoring unit according to one of claims 1 to 6, wherein the holding frame (10) is designed such that the opening (D4-D6) of the open cross section automatically in a suspended state and / or in a rest position, in particular on the crane undercarriage (1) expands. Anchoring unit according to one of claims 1 to 7, wherein the holding frame (10) is designed such that the frame parts (101, 102) automatically contact the boom (3) when the boom (3) is moved into the holding frame (10). Anchoring unit according to one of claims 1 to 8, wherein the holding frame (10) has an upwardly opening cross section, which enables the anchoring unit (9) to be set up by rocking the arm (3). Anchoring unit according to one of claims 1 to 9, wherein the anchoring unit (9) is designed to be set down on the undercarriage (1) of a mobile crane for setting up, in particular by the mobile crane itself. Anchoring unit according to one of claims 1 to 10, wherein the anchoring unit (9) has defined supports (17, 18), via which it can be placed on an undercarriage (1) of a mobile crane and / or on a transport vehicle (8). Anchoring unit according to one of claims 1 to 11, wherein the anchoring unit (9) is designed to be stored on the undercarriage (1) of the mobile crane and / or to remain bolted to the boom (3) of the mobile crane during transport. Tensioning unit transport system, with - A guy unit (9) according to one of claims 1 to 12, and - A transport vehicle (8) designed to transport the guying unit, in particular the guying unit (9) and / or the transport vehicle (8) is / are designed such that the overall width (D1-D3) of the guy unit (9) placed on the transport vehicle (8) is automatically reduced. Telescopic crane, especially mobile crane, with - An undercarriage (1) and an upper carriage (2) rotatably arranged thereon, on which a luffing boom (3) is arranged, which has an outer boom base part (4) and one or more boom telescopic parts (5), and - A guy unit (9) according to one of claims 1 to 12. Method for equipping a telescopic boom guy unit (9) on a mobile crane, with - Providing a guy unit (9) which can be transported separately from the mobile crane according to one of claims 1 to 12; - Placing the guy unit (9) on the undercarriage (1) of the mobile crane, in particular by the mobile crane itself; - Positioning the guying unit (9) on the boom (3) by means of a rocking movement of the boom (3); - Bolt the guy unit (9) to the boom (3).

Images