EP3793930A1

EP3793930A1 - Support for the rear anchoring line of a telescopic crane

Info

Publication number: EP3793930A1
Application number: EP19736696.6A
Authority: EP
Inventors: Christian Moritz Urban
Original assignee: Tadano Demag GmbH
Current assignee: Tadano Demag GmbH
Priority date: 2018-07-09
Filing date: 2019-07-05
Publication date: 2021-03-24
Anticipated expiration: 2039-07-05
Also published as: WO2020011657A1; JP2021533051A; DE102018116575A1; EP3793930B1; US20210179398A1; US11465887B2

Abstract

The invention relates to a vehicle crane (1), in particular a mobile crane, comprising a main jib (7) and a main jib extension (8) which is mounted on same and can be luffed by via at least one luffing cable (9). In order to provide the a vehicle crane with improved load-bearing capacity, according to the invention, at least one anchoring support (11) is arranged on the main jib (7), which guides the luffing cable (9) in order to anchor the main jib (7).

Description

Support for the rear guy line of a telescopic crane

The invention relates to a mobile crane, in particular a mobile crane or crawler crane, with a telescopic main boom and a self-erecting guy support which is articulated on a telescopic section and which guides the luffing rope of a luffing main boom extension.

From the German utility model DE 202 19 126 U1 is a

Telescopic boom of a crane is known, which consists in the usual way of a basic box and a plurality of telescopic sections telescopic from it. At least one of the telescopic sections has a guy stand with two guy supports that can be spread out in a V-shape. To the

Guy supports from a rest position approximately parallel to the respective one

To set up the telescopic shot in a guy position, tie rods are arranged between a free end of the guy supports and a head area of an adjacent telescopic shot. About extending this

In the adjacent telescopic section, the guy supports are raised into the guy position via the tie rods. To adjust the erection of the guy supports to the planned extension path of the neighboring telescopic section, the tie rods are designed as manually adjustable telescopic tubes. In the guy position, guy ropes are guided in the usual way for guying the telescopic boom over the free ends of the guy supports, which are attached to at least one foot of the base box and to a head of the innermost telescopic section.

Furthermore, from the German utility model DE 20 2014 006 460 U1 a further bracing of a telescopic boom of a crane is known, which also has two V-shaped bracing supports. Around

To install guy supports, the guy ropes are combined with the

Extending movement of the neighboring telescopic shot used. To the

To extend the extension movement of the adjacent telescopic section to the guy supports via the respective guy rope, the guy rope can be fixed in the area of the free end of the guy support as required.

Furthermore, from the German patent DE 40 05 082 C1 a vehicle telescopic crane is included a telescopic main boom known. A short lattice boom adapter is arranged on a head of the main boom, on which a main boom extension is mounted so that it can be rocked. A luffing trestle is also mounted on the lattice tower adapter, which is connected to a penultimate inner box of the main boom via a pull rope

is braced. A pulley is attached to the trestle, which serves as a luffing mechanism for the main boom extension and at the other end is connected to a head of the main boom extension. That from the pulley

outward luffing rope is led down to a luffing winch on an uppercarriage of the vehicle telescopic crane.

In addition, the German published patent application DE 1 922 950 A already shows a jib crane with a main boom and a main boom extension that can be rocked about a luffing axis. There are two in the area of the luffing axis

Rocker supports arranged, between the upper ends of a pulley for

Rocking the main boom extension is arranged. For this purpose, the luffing supports are firmly clamped to the main boom foot or the main boom extension head via a so-called neck rope. A luffing rope running out of the block and tackle and necessary for luffing the main boom extension is not described.

The German laid-open specification DE 2 258 807 A already shows a mobile crane with a telescopic main boom, on which a hinged guy support is arranged for additional bracing of the main boom. The hinged guy support can be set up by extending an last inner box of the main boom. In German published patent application DE 10 2016 1 14 837 A1 there is one on each head of a basic box and inner box

telescopic main boom a pair of guy supports an additional

Bracing of the main boom rigidly arranged. The German patent application DE 100 22 600 A1 already shows another mobile crane with a

telescopic main boom with a pair of guy supports for additional bracing of the main boom. The length of the guy supports can be changed to tension the guy.

The invention has for its object to provide a mobile crane with improved load capacity. This object is achieved by a mobile crane with the features of claim 1. In the dependent claims 2 to 14 advantageous embodiments of the invention are given.

According to the invention, in the case of a mobile crane, in particular a mobile crane, with a main boom and a main boom extension mounted thereon, which can be luffed via at least one luffing rope, the luffing rope starting from a winch on the mobile crane being guided over the guy support and at least one luffing jack in the area of a main boom head and fastened there or further until the

Main boom extension led and fixed there, an improved

Load capacity achieved in that at least one on the main boom

Guy support is arranged in the central area of the main boom, which leads to the luffing rope for bracing the main boom. As a result, the luffing rope is supported on the guy support at least during operation of the mobile crane and is deflected or deflected accordingly by the guy support. Via this guy support with the luffing rope, the normal force in the guy support is introduced into the main boom, which stabilizes a main boom bent under load in the sense of reducing the deflection. As a result, the load capacity of the mobile crane can be increased by the individual

Telescopic shots are relieved. This guy support advantageously interacts with the already existing and pre-tensioned luffing rope and thus avoids the installation of an additional guy line, which would otherwise have to be assembled and pre-tensioned in a time-consuming manner. To optimize the support force, the guy support is arranged in the central area of the main boom, i. H. outside the head and foot of the main boom.

The middle range according to the invention can be specified as follows. With regard to a mobile crane with a main boom, which is designed as a telescopic boom with a boom base box and several telescopic sections, it is advantageously provided that the at least one guy support on the main boom between the boom base box and the innermost one

Telescopic shot, i.e. between the base and head box, is arranged. It is particularly advantageous here that the at least one guy support on the main boom in the region of the middle three, preferably two, particularly preferably a central telescopic section is arranged.

For the usual case that the main boom is designed as a telescopic boom with a boom basic box and several telescopic sections, the

If the main boom can be luffed by means of a luffing cylinder articulated on the luffing jib box, the at least one guy support is arranged on the main boom between a linkage of the luffing cylinder on the jib basic box and the innermost telescopic section.

In an advantageous manner, a deflection roller is mounted on a free end of the guy support, over which the luffing rope is guided. This means that the supporting forces can easily be introduced from the luffing rope into the main boom and the telescopic sections can still be telescoped.

In the event that the luffing rope ends in the area of the at least one luffing support, guy rods are used to extend the luffing rope to further luffing supports and to the main boom extension in order to ultimately achieve a connection with the main boom extension to be luffed. Instead of a continuous luffing rope from the winch to the main boom extension, at least parts of it can be replaced from the first luffing support in the direction of the main boom extension by guy rods, bands, chains or other flexible components with high tensile strength.

Transport and assembly of the guy support is made easier by the fact that the guy support is arranged on the main boom so as to be pivotable about a horizontal axis and that the guy support can be erected from a rest position into an operating position. In this case, the at least one guy support is advantageously arranged on a head of a telescopic section of the telescopic boom.

In order to obtain a clearly defined kinematics in the sense of a pivoting direction of the guy support under its own weight or under the deflection force that results from the deflected luffing rope, the guy support closes an angle to the main boom in the range from 75 to 85 degrees, preferably 80 degrees , on. An angle of 90 degrees is preferred for erecting the support with a hydraulic cylinder. Overall, the guy support closes in the Operating position an angle to the main boom in the range of 75 to 90 degrees.

A particularly simple erection of the guy support in the sense of a

Self erecting is achieved in that the main boom as

Telescopic boom is formed and the guy support can be erected by extending the telescopic boom from the rest position to the operating position. In addition, a telescopic boom for comparable loads can be extended further under the existing guying according to the invention, and correspondingly higher lifting heights are achieved.

For this purpose, it is advantageously provided that the guy support has a

Upright rope is erectable, which engages at the end of the guy support via a bracket on the guy support and is connected to a head of a telescopic section above the guy support.

For safety reasons, it is provided that a safety rope limits a maximum erection of the guy support and that the safety rope acts on the end of the guy support and is connected to a head of a telescopic section below the guy support. This prevents the guy support from folding upwards.

In an advantageous embodiment it is provided that several guy supports are arranged on different heads of telescopic sections of the telescopic boom.

It is particularly preferred to have a guy support that is variably adjustable in length. As a result, the deflection point or guide point between the guy support and the luffing rope can be moved as far as possible from the main boom in the orthogonal direction.

An embodiment of the invention will be explained in more detail with reference to the following description. Show it:

Figure 1 is a schematic side view of a mobile crane with main boom and a luffing main boom extension,

FIG. 2a shows a partial view of the mobile crane according to FIG. 1 from the area of the main boom with a guy support in the rest position,

Figure 2b is a partial view according to Figure 2a with a guy support in

Intermediate position and

Figure 2c is a partial view of Figure 2a with a guy support in the operating position.

FIG. 1 is a schematic side view of a mobile crane 1, in particular a mobile crane, with an undercarriage 2 and an uppercarriage 3. The undercarriage 2 has a driver's cab 4 and six axles 5, each with two wheels 6 suitable for road use and rubber tires. The undercarriage 2 can of course have more or fewer than six vehicle axles 5 or alternatively a crawler track. The superstructure 3 is mounted on the undercarriage 2 so as to be pivotable about a vertically oriented axis of rotation D. The superstructure 3 and undercarriage 2 can alternatively also be rigidly mounted on one another. A main boom 7 is arranged on the superstructure 3, which can be pivoted about the horizontal axis D.

Telescopic boom is designed, arranged. The main boom 7 comprises a boom base box 7a and a plurality of telescopic sections 7b to 7f which are arranged in one another and can be telescoped. The boom base box 7a is erectably mounted on the superstructure 3 by a luffing cylinder 8, whereby the main boom 7 can be stored in the boom base box 7a on the undercarriage 2 for a road trip after the telescopic sections 7b to 7f have been completely retracted.

Furthermore, on a top end of the fifth telescopic section 7f and thus on a main boom head 7g, a luffing main boom extension 8, designed as a lattice boom support, is pivotably attached, which is relative to the

Main boom 7 can be erected about a horizontal luffing axis W. Here, the luffing axis W is oriented in the usual way orthogonally to the longitudinal axis of the main boom 7. In the usual way is for the rocking process

Main boom extension 8 at least one luffing rope 9 is provided, which, starting from a winch, not shown, which is arranged in the rear area of the superstructure 3, extends to a first luffing support 10a and is fastened there. In the further continuation, the function of the seesaw rope 9 is taken over by guy rods 16, which in a corresponding manner between the first seesaw support 10a and a second seesaw support 10b and between the second seesaw support 10b and in about the middle of the main boom extension 8 are attached. The first luffing support 10a and the second luffing support 10b are in the usual manner in the area of

Main boom head 7g articulated about horizontal axes and extending rearward with respect to the main boom 7 and V-shaped to each other.

This at least one luffing rope 9 is additionally tensioned in the area of the main boom 7 via a further guy support 11 according to the invention. In the present case, the guy support 11 can be pivoted about a horizontal axis A in the middle of the main boom 7 and is thus arranged in an articulated manner. Basically, the

Guy support 1 1 between the articulation of the rocker cylinder 8 on the

Main boom 7 and the main boom head 7g are arranged. From a static point of view, in the sense of relieving the load on the main boom 7, there will certainly be a middle area at the end. In addition to the individual guy support 11 shown, two or more guy supports 11 can also be arranged at a distance along the rear of the main boom 7.

In addition, a further auxiliary guy support 12a is attached to the head or upper end of the boom base box 7a, which also extends from the boom base box 7a approximately at right angles to the rear. This secondary guy support 12a is part of a main boom guy, which includes a secondary guy rope 12b. The guy rope 12b is from one foot of the

Boom base box 7a to the secondary guy support 12a

Main boom head 7g out. The secondary guy support 12a can also be designed as a pair of guy supports arranged next to and to one another in a V-shape in a horizontal plane. This additional secondary guying 12a, 12b also serves to stiffen the main boom 7.

FIGS. 2a to 2c each show a partial view of the main boom 7 of the

Vehicle crane 1 shown in Figure 1, wherein the guy support 11 is shown in one of three positions. The main boom extension 8 is omitted for a better representation of the guy support 11. Since FIG. 1 is largely identical to FIGS. 2a to 2c, only the differences between the individual figures in the area of the guy support 11 will be discussed in the following paragraphs. FIG. 2a shows the second guy support 15 in a rest position or transport position that is not erected on the main boom 8, folded, almost in contact with the main boom 7. The telescopic sections 7b, 7c, 7e and 7f are fully or far extended and the third telescopic section 7d is only partially (about 10%). The third telescopic section 7d is only telescoped so far that an erection rope 14 tensions, the guy support 11 from the

Main boom 7 adjacent rest position has not yet moved away. The

Rope 14 is at one end at an upper end of the third

Telescopic shot 7d attached and at the other end to the guy support 1 1 in the region of its free end 1 1 a on a console 1 1 b, in particular one

Stem console, attached. In order to be able to better initiate the lifting forces into the guy support 1 1, the bracket 1 1 b is arranged at right angles on the guy support 1 1 and protrudes to the rear, at the free end of which the guy rope 14 engages. Furthermore, it can be seen from FIG. 2a that the free end 1 a of

Guy support 1 1 carries a deflection roller 1 1 c rotatably mounted, which is in engagement with the seesaw rope 9 in the operating position (see Figure 2c). The erection rope 19 can of course also be attached to a head of another telescopic section 7e or 7f.

A safety rope 15 hangs without tension between the free end 1 1 a of the guy support 1 1, the second guy support 15 and the head of the first

Telescope shot 7a down. Of course, the safety rope 15 can also be mounted on the head of another telescopic section 7b to 7f — depending on the mounting location of the guy support 11 - on the head of the jib base box 7a or on the superstructure 3. The function of the safety rope 15 is to prevent the guy support 11 from folding upward. In the rest position shown here, there is no contact of the deflection roller 11 c with the seesaw rope 9. The seesaw rope 9 thus leads from the superstructure 3 to the first seesaw support 10 without deflection.

In Figure 2b, which shows a further partial view of Figure 1, the guy support 11 is in an intermediate position, i.e. between the rest position and one

Operating position. The telescopic sections 7b and 7f of the main boom 8 are fully extended, the second telescopic section 7c approximately 90%, the third telescopic section 7d approximately 20% and the fourth telescopic section 7e approximately 45%. The third telescopic section 7d is wider compared to FIG. 2a telescoped so that the erection cable 14 lifts the guy support 11 out of its stored rest position or pulls it up and the

Deflection roller 11 comes into first contact with the luffing rope 9 and threads into it. The safety rope 15 is still not tensioned in this intermediate position of the guy support 11. In FIG. 2b, the seesaw rope 9 is not yet deflected by the deflecting roller 11 c. There is only a first contact between the luffing rope 9 and the deflection pulley 11 c.

FIG. 2c shows a further partial view of FIG. 1, in which the guy support 11 is shown in the erected operating position. An angle between the

Guy support 11 and the second telescopic section 7c is approximately 75 to 90 degrees, preferably 80 degrees, so that under the action of the deflection force from the seesaw rope 9, the guy support 11 also when telescoping the telescopic section 7d

automatically returns to the idle state for transport. The

Telescopic sections 7b and 7c of the main boom 8 are extended approximately 90% and the telescopic sections 7d to 7f approximately 45%. Because the second and third telescopic rejects 7c, 7d are not fully extended in each case, the tension in the erection rope 14 and the safety rope 15 can be set. The guy support 1 1 engages with its deflecting roller 1 1c in the seesaw rope 9 and deflects the seesaw rope 9 over the deflecting roller 11c. In this operating position the

Guy support 1 1, the main boom 7 is braced or stabilized in addition to the secondary guy 12a, 12b. A deformation of the main boom 7 in the load-receiving direction and large deflections of the main boom 7 can be reduced in this way.

In the present exemplary embodiment, the invention is described on the basis of a mobile crane with a telescopic boom. It goes without saying that the principle of the present invention can also be used for lattice boom or folding boom (foldable boom in lattice mast or box version) and also for

Crawler cranes. Alternatively, the guy support can have at least one

hydraulic lifting cylinder is brought into operating position. At this

An alternative would be an angle of approximately 90 degrees between the main boom 7 and

Guy support 1 1 preferred.

In connection with the present exemplary embodiment, it is also conceivable that in the event that mobile crane 1 has a main boom 7 as a telescopic boom with a boom base box 7a and a plurality of telescopic sections 7b to 7f, the at least one guy support 11 is arranged on the main boom 7 between the boom base box 7a and the innermost telescopic section 7f. The at least one guy support 11 on the main boom 7 should preferably be in the region of the middle three (in the case of an odd total number of boom base boxes 7a and telescopic sections 7b to 7f), preferably two (in the case of an even one

Total number of the boom base box 7a and the telescopic sections 7b to 7f), particularly preferably that of a middle telescopic section 7c, 7d (in the case of an odd total number of the boom base box 7a and the telescopic sections 7b to 7f).

If the mobile crane 1 is equipped with a main boom 7 as a telescopic boom with a boom base box 7a and a plurality of telescopic sections 7b to 7f, the main boom 7 is connected to a boom 7a articulated on the boom base box

Rocker cylinder 13 is rockable, so the at least one guy support 11 on the main boom 7 between an articulation of the rocker cylinder 13 on the

Boom base box 7a and the innermost telescopic section 7f is arranged.

LIST OF REFERENCE NUMBERS

1 mobile crane

2 undercarriages

3 superstructures

4 driver's cab

5 axes

6 tires

7 main boom

7a basic boom

7b first telescopic shot

7c second telescopic shot 7d third telescopic shot

7e fourth telescopic shot

7f fifth telescopic shot

7g main boom head

8 Main boom extension

9 luffing rope

10a first luffing support

10b second luffing support

1 1 guy support

1 1a end of the guy support 1 1 b bracket

1 1c pulley

12a secondary guy support

12b secondary guy rope

13 rocker cylinders

14 Rope

15 safety rope

16 guy rods

17 adapters

A axis of rotation of the stay support 1 1 D axis of rotation

W seesaw axis

Claims

claims

1. Mobile crane (1), in particular a mobile crane, with a main boom (7) and one attached to it, which can be luffed using at least one luffing rope (9)

Main boom extension (8), the luffing rope (9) starting from a winch on the mobile crane (1) via the guy support (1 1) and at least one

The luffing support (10a, 10b) is guided in the area of a main boom head (7g) and fastened there or is further guided up to the main boom extension (8) and fastened there, characterized in that at least one guy support (11) in the main boom (7) middle region of the main boom (7) is arranged, which leads to the lashing of the main boom (7) the luffing rope (9).

2. mobile crane (1) according to claim 1, characterized in that the

Main boom (7) is designed as a telescopic boom with a boom base box (7a) and several telescopic sections (7b to 7f) and the at least one guy support (11) on the main boom (7) between the boom base box (7a) and the innermost telescopic section (7f) is arranged.

3. Mobile crane (1) according to claim 2, characterized in that the at least one guy support (11) on the main boom (7) is arranged in the region of the middle three, preferably two, particularly preferably the one middle, telescopic section (7c, 7d) ,

4. mobile crane (1) according to claim 1, characterized in that the

Main boom (7) is designed as a telescopic boom with a boom base box (7a) and several telescopic sections (7b to 7f), the main boom (7) can be rocked via a luffing cylinder (13) articulated on the boom base box (7a) and the at least one guy support (11 ) is arranged on the main boom (7) between a linkage of the luffing cylinder (13) on the boom base box (7a) and the innermost telescopic section (7f).

5. mobile crane (1) according to at least one of claims 1 to 4, characterized in that at a free end (11 a) of the guy support (1 1) a deflection roller (1 1c) is mounted, via which the luffing rope (9) is.

6. Mobile crane (1) according to at least one of claims 1 to 5, characterized in that at least part of the luffing rope (9) is replaced by guy rods, bands, chains or other flexible components with high tensile strength.

7. mobile crane (1) according to at least one of claims 1 to 6, characterized in that the guy support (1 1) about a horizontal axis (A) is arranged on the main boom (7) and the guy support (11) from a rest position is erectable into an operating position.

8. mobile crane (1) according to at least one of claims 1 to 7, characterized in that the guy support (11) in the operating position includes an angle to the main boom (7) in the range of 75 to 90 degrees, preferably 80 degrees.

9. mobile crane (1) according to claim 7 or 8, characterized in that the

Main boom (7) is designed as a telescopic boom and the guy support (11) can be erected by moving the telescopic boom out of the rest position into the operating position.

10. mobile crane (1) according to claim 9, characterized in that the

Guy support (1 1) on a head of a telescopic section (7b to 7f) of the

Telescopic boom is arranged.

1 1. mobile crane (1) according to claim 9 or 10, characterized in that the guy support (11) via an erection rope (14) can be erected, which at the end (1 1 a) of the guy support (1 1) via a console ( 11 b) engages on the guy support (1 1) and is connected to a head of a telescopic section (7d, 7e, 7f) above the guy support (1 1).

12. Mobile crane (1) according to at least one of claims 9 to 11, characterized in that a safety rope (15) limits a maximum erection of the guy support (1 1) and the safety rope (15) at the end (1 1a) of the guy support ( 11) engages and is connected to a head of a telescopic section (7d, 7e, 7f) below the guy support (11).

13. Mobile crane (1) according to at least one of claims 9 to 12, characterized in that a plurality of guy supports (1 1) are arranged on different heads of telescopic sections (7b to 7f) of the telescopic boom.

14. Mobile crane (1) according to at least one of claims 1 to 13, characterized in that the guy support (11) is variably adjustable in length.