EP4083348A1 - Supporting device for an automatic concrete pump - Google Patents

Abstract

Supporting device for a truck-mounted concrete pump, comprising a frame (26), at least one front pivoting leg and at least one rear pivoting leg, the pivoting legs being articulated on the frame so that they can pivot relative to one another, the front pivoting leg being telescopic and a pivoting section mounted pivotably on the frame and having a movable portion therein having mounted telescopic section, and wherein the pivoting legs are arranged at the same height on the frame, wherein the telescopic section comprises at least two telescopic sections mounted such that they can be slid into one another.

Description

The present invention relates to a support device for a truck-mounted concrete pump according to the preamble of claim 1, a truck-mounted concrete pump with such a support device and a set with a front and a rear swivel leg.

Truck-mounted concrete pumps known from the prior art have a support device in order to divert the loads of the placing boom and any other forces acting on the truck-mounted concrete pump into the subsoil. Usually, such support devices comprise two pairs of mutually pivotable pivoting legs, which are articulated laterally to a support structure (usually the mast block or a structure connected thereto) of the truck-mounted concrete pump and have support cylinders at their ends. At least one of the swiveling legs can usually be swiveled out to the side as well as telescoped in order to achieve the required length for stable support with a compact design at the same time.

When the truck-mounted concrete pump is being driven, the pivoting legs are in a swiveled-in and telescoped state, usually behind a driver's cab of the truck-mounted concrete pump. Due to the compact design, the retracted and pivoted telescopic sections of the pivoting legs usually require space in the other pivoting leg. For this it is known that the non-telescoping pivoting legs are formed in the shape of a fork and towards the pivot axis have open recesses in which the telescopic sections of the telescoping pivoting legs can be accommodated when retracted.

Larger or heavier machines, in particular so-called large-mast truck-mounted concrete pumps, require longer pivoting legs in order to ensure stable and secure support. Due to the resulting enormous dimensions of all supporting structure parts of the machine, in particular the greater length of the telescopic swivel legs, there are space problems with regard to accommodating all desired machine functions, since a larger space for swiveling over the retracted telescopic legs has to be kept free inside the machine or in the area of the frame . On the other hand, the recesses of the non-telescopic pivoting legs must have a correspondingly greater length or fork depth, which further weakens the pivoting legs.

The object of the present invention is therefore to provide a space-saving support device that is suitable for larger truck-mounted concrete pumps without having to make compromises in terms of load capacity. In particular, a better use of space should be made possible at the same time, even in smaller machines.

According to the invention, this object is achieved by a support device having the features of claim 1. Advantageous embodiments of the invention result from the dependent claims and the following description.

Accordingly, a support device for a truck-mounted concrete pump is proposed, which comprises a frame and at least one front pivoting leg and at least one rear pivoting leg. The pivoting legs are articulated to the frame so that they can pivot relative to one another, with the front pivoting leg being designed to be telescopic. The front pivot leg includes a pivot portion pivotally mounted on the frame with a telescoping portion slidably mounted therein. Furthermore, the two pivoting legs are arranged at the same height on the frame, ie they are not articulated on the frame one above the other. The term "pivoted relative to one another to the frame" is to be interpreted broadly and does not imply that the pivot axes must coincide or that the pivot legs are directly connected. It is also conceivable that both pivoting legs are linked to the frame via separate pivoting axes. In particular, the two pivoting legs can be pivoted independently of one another in the unlocked state.

According to the invention, the telescopic section comprises at least two telescopic sections that are mounted such that they can be displaced within one another. In other words, the front pivoting leg is designed as a multiple telescopic pivoting leg, which has at least two telescopic stages. This allows the outrigger widths required to support larger or heavier truck-mounted concrete pumps to be achieved without sacrificing large parts of the installation space inside the machine required for other machine functions to swivel over very long retracted telescopic legs or weakening the rear swivel legs with very large recesses for long retracted telescopic legs.

The telescopic section can be designed in two or more stages, i.e. more than two mutually displaceable telescopic sections can be provided. The telescopic sections can be retracted and extended independently of one another.

In a possible embodiment, it is provided that the pivoting legs are articulated on the frame pivotably about a common vertical pivoting axis, preferably via a two-part pivoting pin. The latter may comprise upper and lower pivot pin parts which are coaxial and spaced from each other. Alternatively, the front and rear pivoting legs can also be pivoted to the frame about two axes lying close to one another, which are also preferably realized by two-part pivoting pins. "Close to each other" can be interpreted in such a way that the The distance between the axes is smaller than the longest part of the telescopic section projecting backwards over the pivoting section.

Due to the division of the pivot pin(s), the telescopic section or one or more of the telescopic sections can penetrate the pivot axis(s) in a retracted state and be pivoted through the recess of the rear pivot leg. This enables a very compact structure. When retracted, one or more of the telescopic stages can penetrate the axis of the common bolt bearing of the front and rear pivoting leg (or, in the case of the alternatively spaced pivoting axes, one of the or both pivoting axes) and protrude as far into a corresponding recess in the rear pivoting leg as it allows the economic design of a load-bearing rear pivoting leg or the space inside the machine required for other machine functions.

However, due to the multiple telescopic design, the telescopic section can also be designed in such a way that, in the fully retracted state, none of the telescopic sections protrudes backwards in the direction of the pivot axis or the rear pivot leg beyond the pivot section. In this case, there is no need for a recess in the rear swivel leg.

In a further possible embodiment it is provided that the rear pivoting leg is articulated on the frame pivotably about a vertical pivoting axis and has a recess open towards the pivoting axis, the rear pivoting leg preferably being fork-shaped in the region of the recess. The fork depth can be less than, more than, or substantially half the length of the rear pivot leg.

In a further possible embodiment it is provided that the telescopic section protrudes at least partially into the recess of the rear pivoting leg in a telescoped-in state. Due to the multiple telescopic design, it is possible to increase the fork depth (ie the length of the recess) compared to an embodiment to be reduced with a single telescope, since the telescopic section of the front pivoting leg protrudes less far into the recess when telescoped in.

In a further possible embodiment, it is alternatively provided that the telescopic section does not protrude into the recess of the rear pivoting leg in a telescoped-in state. With an appropriately skilful design or staggering of the telescopic stages, parts of the space conventionally required by the retracted telescopic section in the recess can provide space for accommodating other machine functions without sacrificing the economy of the rear swivel leg. In this case, the installation space that is now free within the recess can be used to accommodate components of the car pump. Accordingly, it can be provided that at least one component of the car pump can be arranged at least partially in the recess.

In one possible embodiment, it is provided that the rear pivoting leg, apart from its connection to the frame, has a closed profile, in particular a box profile. This means that explicitly no recess described above is provided, but the rear pivoting leg is closed. This results in increased stability and rigidity, since the rear swivel leg is not weakened by a recess. Only the immediate connection area to the frame, i.e. the connection area via which the rear swivel leg is bolted to the frame, can have a different profile (e.g. upper and lower bolt connection means). The opposite end of the rear pivot leg can also have a different profile, for example due to a support cylinder provided there.

In a further possible embodiment it is provided that between the pivoting legs in a pivoted-in state and the frame there is an installation space in which at least one component of the automotive pump can be arranged at least partially. This installation space, which conventionally has to be kept free for swiveling over the retracted telescopic section, can now be used to accommodate machine components.

Thus, the support device according to the invention is not only suitable for extending the support lengths, e.g.

In a further possible embodiment, at least two pairs are provided, each with a rear and a front swivel leg, which are articulated laterally on opposite sides of the frame.

In a further possible embodiment it is provided that the telescopic section comprises a locking means, by means of which the telescopic section can be locked in a pivoted in and telescoped in position relative to the rear pivot leg and/or in an extended position relative to the pivot section. In the latter position, the front pivoting leg can preferably be pivoted and/or pivotable relative to the rear pivoting leg. This position can correspond to a fully or almost fully telescoped state of the front swivel leg. In the first-mentioned position in the locked state, the pivoting legs can be secured for driving on the truck-mounted concrete pump, so that they do not unintentionally swing out and/or telescope out due to forces that occur.

The locking means can be an actively actuatable locking cylinder, which bolts into corresponding bores on/in the pivoting legs. The locking cylinder, which can be operated hydraulically in particular, can be provided on the telescopic section or on one of the telescopic sections and can move with it, which means that it can be used both when driving to lock the two pivoting legs together and in an extended position to lock a telescopic section with the pivoting section (in In the latter case, the front swivel legs are prevented from unintentionally telescoping during work due to the loads that occur). Each telescopic section can have its own locking device (e.g. a blocking cylinder).

The present invention also relates to a set of a front swivel leg and a rear swivel leg of a support device according to the invention. These can be mounted on a frame of a truck-mounted concrete pump. This obviously results in the same advantages and properties as for the supporting device according to the invention, which is why a repeated description is dispensed with.

The present invention also relates to a truck-mounted concrete pump with a support device according to the invention. This obviously results in the same advantages and properties as for the support device according to the invention, which is why a repeated description is dispensed with at this point. Preferably, the truck-mounted concrete pump comprises two pairs of a front and a rear swivel leg, which are hinged to the frame on opposite sides. Preferably, the pivot leg pairs are pivoted about a common vertical axis to the frame, in particular via two-part pivot bolts as described above.

In one possible embodiment, the truck-mounted concrete pump includes a placing boom that can rotate about a vertical axis and is arranged on a mast bracket, with the mast bracket enclosing the frame or being connected to it. The distributor boom can comprise a number of segments that can be swiveled relative to one another, along which a concrete line is routed. The forces occurring during operation of the truck-mounted concrete pump are transmitted to the subsoil via the placing boom and the boom support or the frame as well as via the support device.

Figur 1:

eine perspektivische Ansicht der erfindungsgemäßen Abstützvorrichtung mit vollständig austeleskopierten vorderen Schwenkbeinen gemäß einem ersten Ausführungsbeispiel;

Figur 2:

eine vergrößerte perspektivische Ansicht eines einteleskopierten und eingeschwenkten vorderen Schwenkbeins gemäß Figur 1;

Figur 3:

eine perspektivische Ansicht der erfindungsgemäßen Abstützvor-richtung mit vollständig austeleskopierten vorderen Schwenkbeinen gemäß einem zweiten Ausführungsbeispiel; und

Figur 4:

eine Draufsicht auf die erfindungsgemäße Abstützvorrichtung mit einteleskopierten und eingeschwenkten Schwenkbeinen.

Further features, details and advantages of the invention result from the exemplary embodiments explained below with reference to the figures. Show it:

Figure 1:

a perspective view of the support device according to the invention with fully telescoped front swivel legs according to a first embodiment;

Figure 2:

FIG. 12 is an enlarged perspective view of a telescoped and pivoted front swivel leg according to FIG figure 1 ;

Figure 3:

a perspective view of the supporting device according to the invention with fully telescoped front swivel legs according to a second embodiment; and

Figure 4:

a plan view of the support device according to the invention with telescoped and pivoted legs.

the figure 1 shows a first embodiment of the support device according to the invention in a perspective view. The support device comprises two pairs articulated laterally to a frame 26, each with a front swivel leg 10 and a rear swivel leg 12. The support device is in particular part of a truck-mounted concrete pump, not shown here, which has a mast bracket mounted on the frame 26 so that it can rotate about a vertical axis via a slewing ring with a placing boom. The support device serves to support the truck-mounted concrete pump during operation. For the journey, the swiveling legs 10, 12 can be placed against the truck-mounted concrete pump by swiveling in, so that all swiveling legs 10, 12 are aligned essentially parallel (see Fig figure 4 ).

The rear and front pivot legs 10, 12 are pivoted on each side about a common vertical pivot axis 20 (see Fig figure 2 ) articulated to the frame 26, which is formed by a two-part pivot pin 24 with upper and lower coaxially arranged and axially spaced pivot pin parts. At the same time, the front and rear pivoting legs 10, 12 are articulated at the same height on the frame 26, ie not arranged one above the other. As a result, parts of the front pivot legs 10 that protrude beyond the pivot axis 20 can protrude “to the rear” through the axes 20, resulting in a compact structure.

The upper and lower pivot pin parts 24 are stored in corresponding bolt receptacles of the pivot legs 10, 12. As the figure 2 it can be seen which one shows an individual front pivoting leg 10 in the fully telescoped and pivoted-in state, the bolt receptacles of the front pivoting leg 10 lie within the bolt receptacles of the rear pivoting leg 12. However, geometries are also conceivable in which the bolt receptacles of the upper and/or lower pivoting bolt parts 24 are at the same height or the bolt receptacles of the rear pivot leg 12 lie within the bolt receptacles of the front pivot leg 10. It is also possible for the front and rear pivoting legs 10 to be pivoted to the frame 26 about two separate axes which are close together.

The rear and front pivot legs 10, 12 are pivotable about the pivot axes 20 independently of each other. The front swivel legs 10 are also telescopic (in contrast to the rear swivel legs 12). Each front swivel leg 10 includes a swivel section 14, also referred to as a push-out box, which is articulated to the frame 26 via the swivel pin parts 24 as previously described. Within each pivoting section 14, a telescopic section 16 is slidably mounted, which in the exemplary embodiments shown here comprises two telescopic sections 16a, 16b mounted slidably one within the other. The telescopic section 16 is therefore constructed in two stages.

At the ends of the innermost telescopic sections of the front swivel legs 10 there are vertically retractable and extendable support cylinders 22, as well as at the ends of the rear swivel legs 12. By extending the hydraulically operated support cylinders 22 in particular, the chassis of the truck-mounted concrete pump can be lifted off the ground for work .

The telescoping in and out of the individual telescopic stages 16a, 16b of the front pivoting legs 10 functioning as multiple telescopic pivoting arms can be carried out by one or more hydraulic cylinders. An intermediate stage can be provided in which only one of the telescopic sections 16a, 16b is extended. This results in more flexible support options, which can be particularly advantageous when there is little space on the construction site.

An auxiliary frame is located between the rear pivoting legs 12 and is connected to the frame 26 via diagonally running tie rods, among other things. Subframes and tie rods can be considered part of frame 26 .

At the in the Figures 1 and 2 shown first embodiment, the rear pivoting legs 12 to the pivot axes 20 towards open recesses 18 which extend along the longitudinal axes of the rear pivoting legs 12 to about half the length. This results in a fork-shaped structure of the rear pivoting legs 12. The fork depth can also be smaller or larger than shown here, with smaller fork depths being aimed at for reasons of stability. The recesses 18 are conventionally intended to accommodate the parts of the front pivoting legs 10 that protrude backwards through the pivoting axes 20 in the telescoped-in state, thus enabling a compact construction. In the case of large support lengths, the fork depths must therefore be selected to be correspondingly long, which leads to a weakening of the rear pivoting legs 12.

If they were in the figure 1 If the front swivel legs 10 shown are designed as single telescopes, these fork depths would not be sufficient to accommodate the parts of the retracted telescopic sections 16 that protrude backwards beyond the swivel sections 14 . Due to the fact that the front pivoting legs 10 are designed according to the invention as multiple telescopic legs and have several (here: two) telescopic stages, the recesses 18 can be smaller, which gives the rear pivoting legs 12 greater rigidity. The support device according to the invention is therefore also suitable for very large/heavy truck-mounted concrete pumps.

In the embodiments shown here, the front swivel legs 10 are even designed in such a way that in the fully telescoped state, as is the case, for example, in FIG figure 2 can be seen, no parts of the telescopic sections 16a, 16b protrude to the rear. The recesses 18 are therefore not required at all for storing the telescopic sections 16 in the pivoted-in state and are available for other machine components or functions. This one won Space is in the figure 1 denoted by the reference numeral 40. For example, components can be placed directly in the recesses 18 or in the areas of the machine that are located in the recesses 18 when the rear swing legs 12 are folded without sacrificing the economy of the rear swing legs 12. There is therefore more space for installation Attachments available.

A second embodiment of the support device according to the invention is in figure 3 shown. The only difference from the first exemplary embodiment is that the rear pivoting legs 12 have no recesses 18 . The areas 30 corresponding to the recesses 18 are closed here, so that the rear pivoting legs 12 are closed over the entire length or have a closed (for example box-shaped) profile. This results in greater rigidity of the rear pivoting legs 12, so that the supporting device can withstand higher loads. This is only possible because no parts of the front multi-stage pivoting legs 10 protrude into the area of the rear pivoting legs 12 in the retracted state.

the figure 4 shows the supporting device according to the invention in a schematic plan view. This can be either of the two exemplary embodiments. From the figure 4 Another advantageous aspect of the inventive design of the front pivoting legs 10 results. Normally, areas must be kept free in the area between the pivoting legs 10, 12 and the frame 26 or the inner machine components, since when the front pivoting legs 10 are not fully telescoped out, the rearward protruding parts of the telescopic sections 16 protrude into these inner areas. These areas are in the figure 4 marked with the reference numeral 42. Due to the fact that the front pivoting legs 10, designed according to the invention as a multiple telescope, do not have any parts protruding backwards in the telescoped state, there is no pivoting over into these areas 42, so that this installation space is now also available for accommodating machine components or add-on parts for machine functions.

The machine components or add-on parts mentioned can be, for example, control blocks, switch cabinets, storage space, but also any other components. These can be mounted on the frame 26 .

The embodiment of the front pivoting legs 10 as multiple telescopes according to the invention also has the advantage that the operator can extend the front pivoting legs 10 more easily. He can drive more variably with the front pivoting legs 10, since there are fewer collision problems with parts of the truck-mounted concrete pump. The support areas can also be extended by an intermediate position, which means that more mast positions can be released. If the telescopic sections 16a, 16b are extended using hydraulic cylinders, the length of the front pivoting legs 10 can optionally be measured or recorded using appropriate sensors (for example magnetic position sensors). This results in the possibility of regulating the stability of the truck-mounted concrete pump, which increases safety during operation.

Reference list:

10

Front pivot leg

12

Rear pivot leg

14

pivot section

16

telescopic section

16a

telescopic shot

16b

telescopic shot

18

recess

20

pivot axis

22

support cylinder

24

pivot pin

26

frame

30

closed area

40

installation space

42

installation space

Claims (10)

Support device for a truck-mounted concrete pump, comprising a frame (26), at least one front pivoting leg (10) and at least one rear pivoting leg (12), the pivoting legs (10, 12) being articulated on the frame (26) so that they can pivot relative to one another, the front Pivoting leg (10) is telescopic and has a pivoting section (14) mounted pivotably on the frame (26) with a telescopic section (16) mounted displaceably therein, and wherein the pivoting legs (10, 12) are arranged at the same height on the frame (26), characterized, that the telescopic section (16) comprises at least two telescopic sections (16a, 16b) which are mounted such that they can be displaced within one another. Supporting device according to Claim 1, in which the pivoting legs (10, 12) are articulated on the frame (26) so as to be pivotable about a common vertical pivot axis (20), preferably via a two-part pivot bolt (24). Support device according to one of the preceding claims, wherein the rear pivoting leg (12) is articulated on the frame (26) pivotably about a vertical pivoting axis (20) and has a recess (18) open towards the pivoting axis (20), the rear pivoting leg ( 12) is preferably fork-shaped in the region of the recess (18). Supporting device according to Claim 3, in which the telescopic section (16) projects at least partially into the recess (18) of the rear pivoting leg (12) in a telescoped-in state. Supporting device according to claim 3, wherein the telescoping section (16) does not protrude into the recess (18) of the rear pivoting leg (12) when it is telescoped in, it being possible for at least one component of the car pump to be arranged at least partially in the recess (18). Support device according to Claim 1 or 2, in which the rear pivoting leg (12), apart from its connection to the frame (26), has a closed profile, in particular a box profile. Supporting device according to one of the preceding claims, wherein between the pivoting legs (10, 12) in a pivoted-in state and the frame (26) there is an installation space (42) in which at least one component of the car pump can be at least partially arranged. A stabilizer as claimed in any preceding claim, wherein there are two pairs of rear and front pivot legs (10,12) hinged to the frame (26) on opposite sides. Set comprising a front swivel leg (10) and a rear swivel leg (12) of a support device according to any one of the preceding claims. Truck-mounted concrete pump with a support device according to one of Claims 1 to 8, the truck-mounted concrete pump preferably having two pairs articulated on opposite sides of the frame (26), each consisting of a front and a rear swivel leg (10, 12) and/or a frame (26) comprehensive or with a placing boom connected to the frame (26) mast trestle.

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