EP3337752A1

EP3337752A1 - Mobile crane and method for angling a main boom extension in relation to a main boom of a mobile crane

Info

Publication number: EP3337752A1
Application number: EP16798539.9A
Authority: EP
Inventors: Roland Kuhn; Michael Martin
Original assignee: Terex Global GmbH
Current assignee: Terex Global GmbH
Priority date: 2015-11-24
Filing date: 2016-11-22
Publication date: 2018-06-27
Anticipated expiration: 2036-11-22
Also published as: US10781083B2; CN108290724A; DE102015120350B3; WO2017089356A1; US20180339889A1; EP3347300B1; CN108883916B; CN108290724B; CN108883916A; EP3337752B1; WO2017089353A1; EP3347300A1; US10640340B2; US20180346292A1

Abstract

The invention relates to a mobile crane, comprising a main boom (1), which is supported on the mobile crane in such a way that the main boom can be rocked and which can be put upright by means of an elevating cylinder (3), and a main boom extension (4), which is releasably connected to a main boom head (1a) of the main boom (1) by means of upper pins (6) and lower pins (7), wherein main boom extension (4), proceeding from a home position, can be angled in relation to the main boom (1) about a rocking axis (W) by means of an angle drive after the upper pins (6) have been released, which angle drive acts on a base (4d) of the main boom extension (4), wherein a drive of the mobile crane provided for a different task provides the kinetic energy for the angle drive. In order to simplify angling of the main boom extension, the angle drive according to the invention is designed in such a way that a telescoping cylinder of the main boom (1) provides the kinetic energy for the angle drive. The invention further relates to a method for angling a main boom extension therefor.

Description

A mobile crane and method for tuning a main boom extension relative to a main boom of a mobile crane

The invention relates to a mobile crane with a rocker mounted thereon and erectable via a luffing cylinder main boom and with a detachably connected to a main boom head of the main boom on top bolts and lower bolts main boom extension, the Hauptauslegerverrascherung starting from a basic position after loosening the upper bolt by means of a Abwinkelantriebs order a luffing axis relative to the main boom is angled, the Abwinkelantrieb engages a foot of the main boom extension, a provided for another task drive the mobile crane provides the kinetic energy for the Abwinkelantrieb.

Also, the invention relates to a method for bending in a

Main boom extension relative to a main boom of a mobile crane, the main boom is tiltably mounted on the mobile crane and erectable via a luffing cylinder, the main boom extension is releasably connected to a main boom head of the main boom via upper bolts and lower bolts, a Abwinkelantrieb engages a foot of the main boom extension, by means of the Abwinkelantriebs, which refers to the Abwinkein its kinetic energy from a drive of the mobile crane, which is otherwise provided for another task of the mobile crane, the main boom extension is raised from a basic position about a rocking axis relative to the main boom, as far as the upper pin relieves then the top bolts are removed.

German Utility Model DE 20 2004 020 760 U1 already discloses a mobile crane with a main boom and a main boom extension attached to its main boom head. The main boom extension is from a home position in which the main boom extension with its

Longitudinal direction is aligned in extension of the longitudinal direction of the main boom, in a 20 ° position and a 40 ° position tiltable. The

Main boom extension is usually over two lower in the range of lower boom of the main boom extension and two upper in the range of

The upper boom of the main boom extension bolts arranged releasably attached to the main boom head. Around the main boom extension around as In a first step, the two upper bolts are pulled and in a second step, hydraulic rocker cylinders, which engage the main boom head and the main boom extension, cause the rocker axes of the two rocker pins to rock from the basic position

Main boom extension effected. The two upper pins are inserted and removed via a hydraulic bolting cylinder. To supply the luffing cylinder and the bolting cylinder, a self-sufficient hydraulic unit is arranged at the lower end of the main boom extension. When

Hydraulic unit, for example, a diesel engine or electric motor can be used in each case with an associated hydraulic pump.

The object of the invention is to provide a mobile crane and a method for tilting a main boom extension relative to a main boom of a mobile crane, with which the angle of the main boom extension is simplified.

This object is achieved by a mobile crane having the features of claim 1 and by a method for tilting a main boom extension relative to a main boom of a mobile crane having the features of claim 6. Advantageous embodiments of the invention are specified in the subclaims 2 to 5.

According to the invention in a mobile crane with a rockable mounted thereto and erectable via a luffing jib main boom and with a detachably connected to a main boom head of the main boom via upper bolts and lower bolts main boom extension, the main boom extension, starting from a normal position after loosening the upper bolt by means of a Abwinkelantriebs about a rocking axis relative to the main boom

can be bent, the Abwinkelantrieb engages a foot of the main boom extension, a provided for another task drive the mobile crane provides the kinetic energy for the Abwinkelantrieb, a simplification achieved in that the Abwinkelantrieb is designed such that a telescoping cylinder of the main boom, the kinetic energy for the Abwinkelantrieb supplies. This ensures that the Abwinkein does not take place via external aids or additional auxiliary cylinder, but existing drives are used on the mobile crane, which are available anyway. The angle is not over in addition

to be provided hydraulic cylinder. The Abwinkein in itself is largely on the floor or the storage position of the main boom, so that it is not necessary to work well above the top of the mobile crane. The

The invention permits the deviation of the main boom extension with a mobile crane standing on a level ground with horizontally aligned telescopic boom. For the last part of the boom extension in a 20 ° or 40 ° position, the luffing cylinder of the main boom is used.

It is provided that in particular the Abwinkelantrieb on the one hand acts on the main boom and on the other hand on the main boom extension in the region of the upper flange. In addition, advantageously, the Abwinkelantrieb is designed such that the main boom extension against the gravitational force of the main boom extension about the rocking axis is pivotally raised and lowered. Here, in particular, the rocking axis of a lower

Roller head axle formed.

In an advantageous variant it is provided that the Abwinkelantrieb a

Coupling rod comprises, the coupling rod is attached to a first coupling rod end to the upper flange of the main boom extension and attached to a second coupling rod end to the main boom, the length of the coupling rod is chosen so that a previously extended to a Ausfahrweg main boom is then so retractable and extendable in that the main boom extension is pivotally raisable and lowerable about the rocking axis against the force of gravity of the main boom extension.

According to the invention, in a method for bending in a

Main boom extension relative to a main boom of a mobile crane, wherein the main boom is tiltably mounted on the mobile crane and erectable via a luffing cylinder, the main boom extension is releasably connected to a main boom head of the main boom via upper bolts and lower bolts, a

Abwinkelantrieb attacks on a foot of the main boom extension, wherein by means of the Abwinkelantriebs that refers to the Abwinkein its kinetic energy from a drive of the mobile crane, otherwise for another task of the mobile crane is provided, the main boom extension is raised starting from a basic position about a rocking axis relative to the main boom, as far as the upper bolts are relieved, then the upper bolts are removed, a simplification achieved by using Abwinkellaschen between the main boom head and a top flange of the main boom extension are used or, over which a desired bending of the main boom extension is limited to the main boom, by means of

Abwinkelantriebs the main boom extension is lowered until the maximum Abwinkelstellung is reached or a tip of

Main boom extension on a ground comes to rest, the propulsion of the mobile crane is disconnected from the angled drive and when the maximum

Abwinkelstellung is not reached, by raising the main boom, the main boom extension is bent until reaching the desired angle and for providing the kinetic energy coupling rod is connected to the main boom and the main boom extension and on a retraction and extension of the main boom, the kinetic energy is provided. With regard to the advantages associated with this, reference is made to the statements above for the mobile crane. In the context of the present invention, a mobile crane is understood as meaning both a mobile telescopic crane and a movable crawler crane with a lattice boom.

The invention will be explained in more detail with reference to an embodiment shown in a drawing. Show it:

Figure 1 is a side view of a main boom with a

Main boom extension in a basic position, Figure 2a is a side view of a Abwinkellasche in a 40 ° position,

FIG. 2b shows a sectional view of FIG. 2a,

FIG. 2c shows a plan view of an angled lug in a transport position, FIG. 2d shows a sectional view of FIG. 2c,

FIG. 2e shows a side view of an angled lug in a 20 ° position, FIG. 3 shows the main arm according to FIG. 1 with the main boom extension in a 20 ° position,

4 shows the main boom according to FIG. 1 with the main boom extension in a 40 ° position, FIG.

FIG. 5 shows a detailed view of FIG. 4 with an angled lug in the stop position,

FIG. 6 shows a detailed view from the area of the coupling of FIG

Main boom extension to the main boom and a tie rod to the angle and

Figure 7 is a view as in Figure 6 in another position of

Main boom extension. 1 shows a side view of a main boom 1 of a telescopic crane, not shown, is shown. Of the telescopic crane only a base frame 2 of a superstructure is shown. On the base frame 2, the main boom 1 is pivotally mounted with its main boom 1 c in the usual manner about a substantially horizontal axis and a symbolically indicated by a line rocker cylinder 3, which acts on the base frame and the main boom 1, in

appropriate way set up and tapping. In the figure 1, the main boom 1 is shown in a so-called stowed position, in which the main boom 1 is aligned with its longitudinal direction substantially horizontally. The main boom 1 is designed as a telescopic boom with a base box 1 b and guided therein telescopic shots 1 d and has at its the base frame 2 of the upper carriage end facing away from a main boom head 1 b and thus at the innermost

Telescopic shot 1 d20 on. The telescopic boom is arranged in the usual way via a not shown and in the innermost telescopic section 1 d

Telescopic cylinder extendable and retractable. On the main boom head 1 b is a

Extension of the main boom 1 in the form of a main boom extension 4 releasably secured. The main boom extension 4 can be used temporarily or permanently with the telescopic crane to achieve over the largest boom length of the main boom 1 beyond even greater overall length of the boom or to allow working behind building edges. This main boom extension 4 is designed as a lattice mast, which is a truss pipe construction in the usual way. The main boom 1 and the

Main boom extension 4 are in Figure 1 in a 0 ° position or normal position in which the longitudinal direction H of the main boom 1 and the longitudinal direction V of the main boom extension 4 are aligned with each other or parallel to each other. A so-called rocking angle a of the main boom 1 relative to the superstructure 2 is thus 0 ° in the stored position. With the rocking angle a, the erection of the main boom 1 relative to the superstructure 2 is described. The main boom extension 4 is spaced in this basic position of a bottom 10 and is thus of the

Main boom 1 via a bolt on the main boom head 1 a worn.

Such main boom extensions 4 are basically constructed as modular systems of individual main elements and can be assembled according to the requirements of its length or carrying capacity. The single ones

Main elements have transportable dimensions and are not carried along with the telescopic crane in most cases, but are transported separately. If the axle loads of the telescopic crane and the size of the

Main boom extension 4 allow, if necessary, the

Main boom extension 4 are carried. This would then be in a transport position laterally next to and parallel to the main boom 1. A connection of the individual main elements to each other to the desired

Main boom extension 4 via bolt connections in corresponding Verbolzungsstellen A, B, C and D. The attachment to the main boom head 1 a can be made elementary or as a preassembled unit or units.

FIG. 2a shows a side view of an angled flap 9 in a maximally extended 40 ° position. The Abwinkellasche 9, via the manual over a stop surface 9a (see Figure 2d) a displacement and thus the angle of deflection b is limited, consists essentially of a sliding tab 9b with a slot-shaped guide opening 9c, on which a guide tab 9d in

Longitudinal direction c of the sliding tab 9b is feasible. The sliding lug 9b is formed as an elongated flat profile with the stopper opening 9c and extends substantially parallel to the longitudinal direction V of the main boom extension 1. On one of the main boom head 1 a end facing the sliding lug 9b has a bore 9j (see Figure 2d), via which the sliding latch 9b each with a connecting bolt 9e on the main boom head 1 a at one of the Verbolzungsstellen E and F is releasably attached. The connecting bolt 9e is aligned with its longitudinal extension parallel to the upper or lower roller head axles 12a, 12b. On the sliding tab 9b, the guide plate 9d is pushed, which for this purpose has a closed rectangular cross-section with a guide opening 9f (see Figure 2b), in which the sliding tab 9b is inserted and slidably guided. The guide plate 9d per se is releasably secured to a main boom 1 a end facing via a respective further connecting pin 9i in one of the Verbolzungsstellen G and H on the main boom extension 4. The connecting pin 9i is aligned with its longitudinal extent parallel to the upper and lower roller head axles 12a, 12b. Also, the terminal pin 9i is passed through the stopper opening 9c of the slide tab 9b. In order to limit a displacement of the guide tab 9d on the sliding tab 9b, two continuous and longitudinally of the guide tab 9d from each other

spaced stop holes 9g (see Figure 2d) arranged in the side parts of the guide tab 9d. A first of the two stop holes 9g serves to limit the angle of deflection b to 20 ° and a second to 40 °. The stop holes 9g for 40 ° are correspondingly closer to the main boom head 1a arranged to allow a larger displacement. Depending on

desired angle of deflection b is in the respective stop hole 9g

Inserted stop pin 9h, which then passes through the two opposite stop holes 9g and the intermediate stop opening 9c. In FIG. 2a, the stop pin 9h is inserted into the second of the two stop bores 9g, which limits the angle of deflection b to 40 °. The stopper pin 9h is guided adjacent to the pin 9i in the stopper opening 9c. The bolt 9i would come into contact only with the opposing abutment surface 9a of the stopper opening 9c when no stopper bolt 9h is inserted. The second of the two stop holes 9g is free. FIG. 2b shows a sectional view of FIG. 2a along section line AA. It can be seen that the guide tab 9d a rectangular

Cross-section having a central guide opening 9f, in which the sliding tab 9b is guided with its stop opening 9c.

Furthermore, FIG. 2c shows a plan view of an angled lug 9 in a transport position. In this transport position, the Abwinkellasche 9 is not attached via the connecting bolt 9 e on the main boom head 1 a and the sliding tab 9 b is in the direction of the main boom extension 4 in the

Guide tab 9d inserted. The connecting bolt 9e and the stopper pin 9h are inserted for storage.

FIG. 2d shows a sectional view of FIG. 2c along the section line B-B in FIG. 2c. In this view, the stopper opening 12c and the two

Good to recognize stop holes.

FIG. 2e shows a side view of an angled lug 9, which substantially corresponds to the angled lug 9 shown in FIG. 2a. Unlike in Figure 2a, the Abwinkellasche 9 is not shown in the 40 ° position, but in the 20 ° - position. Correspondingly, the stopper pin 9h is inserted in the stopper hole 9g remote from the main jib head 1a.

In the figure 3, the main boom 1 of Figure 1 with the

Main boom extension 4 in a 20 ° position, the position described above is shown, in which the lowered tip 4a is supported on the bottom 10.

4 shows the main boom 1 of Figure 3 with the

Main boom extension 1 a in a 40 ° position in which the lowered tip 4 a is supported on the floor 10.

FIG. 5 shows a detailed view of FIG. 4 from the area of the coupling of the main boom extension 4 to the main boom 1 with an angled lug 9 in the stop position to a desired maximum angle position. In the figure 6 is a detail view of the coupling of the Main boom extension 4 to the main boom 1 shown in basic position. The kinetic energy for bending the main boom extension 4 is provided here as an alternative to the previously described embodiment via a combination of a coupling rod 1 1 with a telescopic cylinder telescopic main boom 1 available. The coupling rod 1 1 is aligned substantially parallel to the longitudinal direction H of the main boom 1 and to the longitudinal direction V of the main boom extension 4 and at a first

Coupling rod end 1 1 a in the region of the upper chord 4a of

Main boom extension 4 via a horizontally extending bolt

coupled. The opposite second coupling rod end 1 1 b is also via a horizontally extending bolt on a base box 1 b of the

Main boom 1 stored. The length of the coupling rod 1 1 is chosen so that one extended by a Ausfahrweg x relative to the base box 1 b

Telescopic shot 1 c is then so retractable and extendable that the

Main boom extension 4 against the gravitational effect of

Main boom extension 4 to the rocker axis W is pivotally raised and lowered. At one of the two coupling rod ends 1 1 a, 1 1 b, the

Coupling rod 1 1 with a slot 1 1 c are provided to after a

Extending the main boom 1 to the extension path x the coupling rod 1 1 easier to connect to the main boom 1 and the main boom extension 4 can. A first slight lifting of the main boom extension 4 is required to relieve the upper bolt 6 and then remove. Subsequently, the telescopic section 1 c is retracted and relatively speaking, the length of the coupling rod 1 1 released that leads to angling of the main boom extension 4. After the tip 4c of the main boom extension 4 comes to rest on the floor 10, the coupling rod 1 1 is removed. In a further step, the main boom extension 4 is further by a Aufwippen the main boom 1

angled and the tip 4c of the main boom extension 4 slides through this over the bottom 10 in the direction of the superstructure 2. By the Aufwippen is the

Main boom extension 4 in a rocking angle a, which is enclosed by the longitudinal direction H of the main boom 1 and the horizontal of the bottom 10, as long as angled until the Abwinkellaschen 9 limit the bending in a preselected position. This position in which the

Main boom extension 4 is located to the main boom 1 in a 40 ° position, is shown in Figure 4. At the time of limiting the Abwinkelbewegung through the Abwinkellaschen 9, the tip 4c has just contact with the ground 10. In a further Auflippen of the main boom 1 then lifts the

Main boom extension 4 from the bottom 10 until the desired position for the main boom 1 with the main boom extension 4 arranged thereon is achieved in a 40 ° position thereto. In this position, the main boom extension 4 is held above its own weight. An appropriate lock in the

Abwinkellaschen 9 but is not provided in the present embodiment.

Preferably, two are parallel to one another on the right and left sides of the

Main boom 1 extending coupling rods 1 1 provided.

In the figure 7 is a view as in Figure 6 in a different position of

Main boom extension 4 shown. It can be seen that the

Main boom extension 4 is already angled so far that the tip 4 c has reached the bottom 10. The telescopic section 1 c is retracted and the coupling rod 1 1 is relieved. When this position is reached, the next step is the removal of the coupling rod 1 1 and the further bending over the interaction of setting up the main boom 1 and the Abwinkellaschen. 9

A backward angle of the main boom extension 4 is reversed

Sequence.

Although in the context of the present embodiment of the

Main boom 1 is described as a telescopic boom and the skin extension boom 4 as a lattice boom, the invention is also on others

Embodiments of main boom 1 and skin extension boom 4 applicable. The main boom 1 may also be a lattice boom or a combination of telescopic boom, lattice boom and / or box boom. For the skin extension boom 4 lattice boom or box boom or combinations thereof are conceivable. LIST OF REFERENCE NUMBERS

1 main boom

1 a main boom head

1 b basic box

1 c main boom foot

1 d telescopic shot

2 basic frames

3 rocker cylinders

4 main boom extension 4a upper belt

4b bottom strap

4c tip

4d foot

5 upper bolt

6 lower bolt

7 drawbar

8 bolting point

9 Abwinkellasche

9a stop surface

9b sliding latch

9c stop opening

9d guide strap

9e connecting bolts

9f guide opening

9g stop hole

9h stop bolt

9i connecting bolts

9j bore

10 floor

1 1 coupling rod

1 1 a first coupling rod end 1 1 a second coupling rod end 1 1 c slot

12a upper roller head axle 12b lower roller head axle

A bolting point

B bolting point

C bolting point

D bolting point

E bolting point

F bolting point

G Verbolzungsstelle

H bolting point a Wippwinkel

b angle of attack

c longitudinal direction

x extension path

H longitudinal direction of the main boom

V Lengthwise direction of main boom extension

W rocking axis

Claims

claims

1 . Mobile crane with a rocker mounted thereon and about a luffing cylinder (3) erectile main boom (1) and with a detachable on a main boom head (1 a) of the main boom (1) via upper bolt (5) and lower bolt (6)

associated main boom extension (4), wherein the main boom extension (4) starting from a basic position after loosening the upper bolt (5) by means of a Abwinkelantriebs about a rocking axis (W) relative to the main boom (1) is bendable, the Abwinkelantrieb a foot ( 4d) the

Main boom extension (4) attacks, with a provided for another task drive the mobile crane provides kinetic energy for the Abwinkelantrieb, characterized in that the Abwinkelantrieb is designed such that a telescoping cylinder of the main boom (1) provides the kinetic energy for the Abwinkelantrieb.

2. Mobile crane according to claim 1, characterized in that the Abwinkelantrieb on the one hand to the main boom (1) and on the other hand on the

Main boom extension (4) in the region of its upper flange (4a) attacks.

3. Mobile crane according to claim 1 or 2, characterized in that the

Abwinkelantrieb is designed such that the main boom extension (4) against the force of gravity of the main boom extension (4) to the

Rocking axis (W) can be raised and lowered by swiveling.

4. Mobile crane according to one of claims 1 to 3, characterized in that the rocking axis (W) of a lower roller head axis (12 b) is formed.

5. Mobile crane according to one of claims 1 to 4, characterized in that the Abwinkelantrieb comprises a coupling rod (1 1), the coupling rod (1 1) at a first coupling rod end (1 1 a) on the upper flange (4 a)

Main boom extension (4) is attached and attached to a second

Coupling rod end (1 1 b) is attached to the main boom (1), the length of the coupling rod (1 1) is selected so that a previously extended by a Ausfahrweg (x) main boom (1) is then retractable and extendable that the main boom extension (4) against the gravitational effect of Main boom extension (4) about the rocking axis (W) is pivotally raised and lowered.

6. A method for bending a main boom extension (4) relative to a main boom (1) of a mobile crane, in particular a mobile crane according to one of claims 1 to 5, wherein the main boom (1) stored tiltable on the mobile crane and a rocking cylinder (3) erectable is, the main boom extension (4) releasably connected to a main boom head (1 a) of the main boom (1) via upper bolts (5) and lower bolts (6), a Abwinkelantrieb on a foot (4d) of the main boom extension (4) attacks, wherein by means of the Abwinkelantriebs, which refers to the Abwinkein its kinetic energy from a drive of the mobile crane, which is otherwise provided for another object of the mobile crane, the

Main boom extension (4) starting from a basic position by one

Wippachse (W) relative to the main boom (1) is raised, as far as the upper pin (5) are relieved, then the upper pin (5) are removed, characterized in that between the main boom head (1 a) and a top chord ( 4a) of the main boom extension (4) Abwinkellaschen (9) are used or are used, via which a desired bending of the main boom extension (4) is limited to the main boom (1), by means of Abwinkelantriebs the main boom extension (4) is lowered until the maximum angle position is achieved or a tip (4c) of the

Main boom extension (4) on a floor (10) comes to rest, the drive of the mobile crane is separated from the Abwinkelantrieb and if the maximum Abwinkelstellung is not reached, by raising the main boom (1), the main boom extension (4) until reaching the desired Angling is bent and for providing the kinetic energy, a coupling rod (1 1) with the main boom (1) and the main boom extension (4) is connected and on a retraction and extension of the main boom (1) the kinetic energy is provided.