EP4083346B1 - Dispositif de support pour une pompe à béton sur camion - Google Patents

Dispositif de support pour une pompe à béton sur camion Download PDF

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Publication number
EP4083346B1
EP4083346B1 EP22165017.9A EP22165017A EP4083346B1 EP 4083346 B1 EP4083346 B1 EP 4083346B1 EP 22165017 A EP22165017 A EP 22165017A EP 4083346 B1 EP4083346 B1 EP 4083346B1
Authority
EP
European Patent Office
Prior art keywords
swivel
leg
frame
locking means
support device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22165017.9A
Other languages
German (de)
English (en)
Other versions
EP4083346A1 (fr
Inventor
Stefan Lang
Rainer Haberkorn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Mischtecknik GmbH
Original Assignee
Liebherr Mischtecknik GmbH
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Publication date
Application filed by Liebherr Mischtecknik GmbH filed Critical Liebherr Mischtecknik GmbH
Publication of EP4083346A1 publication Critical patent/EP4083346A1/fr
Application granted granted Critical
Publication of EP4083346B1 publication Critical patent/EP4083346B1/fr
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck

Definitions

  • the present invention relates to a support device for a truck-mounted concrete pump, a truck-mounted concrete pump with such a support device and a set with at least one front and at least one rear pivot leg.
  • Truck-mounted concrete pumps known from the prior art have a support device in order to transfer the loads of the placing boom and possibly other forces acting on the truck-mounted concrete pump into the ground.
  • Such support devices usually include two pairs of mutually pivotable pivot legs, which are laterally articulated to a support structure (usually the mast frame or a structure connected to it) of the truck-mounted concrete pump and have support cylinders at their ends. At least one of the swivel legs can usually be swung out laterally as well as telescoped in order to achieve the required length for stable support while maintaining a compact design.
  • the swivel legs When the truck-mounted concrete pump is in operation, the swivel legs are in a swung-in and telescoped state, usually behind a driver's cab of the truck-mounted concrete pump. Due to the compact design, the retracted and swiveled telescopic sections of the swivel legs usually require space in the other swivel leg.
  • the non-telescoping swivel legs are fork-shaped and towards the swivel axis have open recesses in which the telescopic sections of the telescopic swivel legs find space when retracted.
  • each telescopic swivel leg has a further locking device, which prevents the swivel legs from unintentionally retracting during operation due to the forces acting on the support device.
  • the present invention is therefore based on the object of providing a simpler and more cost-effective locking device for the supporting device of truck-mounted concrete pumps.
  • this object is achieved by a set for a support device for a truck-mounted concrete pump according to claim 9 and by a support device according to claim 1.
  • Advantageous embodiments of the invention result from the subclaims and the following description.
  • a support device for a truck-mounted concrete pump which has a frame and at least one front pivot leg and at least includes a rear pivot leg.
  • the swivel legs are pivotally connected to the frame relative to one another, with the front swivel leg being designed to be telescopic.
  • the front swivel leg comprises a swivel section pivotally mounted on the frame with at least one telescopic section displaceably mounted therein. The latter can be stored at least partially in a recess in the rear swivel leg in a telescoped state.
  • pivot axes must coincide or that the pivot legs are directly connected to one another. It is also conceivable that both pivot legs are articulated to the frame via separate pivot axes. In particular, the two pivot legs can be pivoted independently of one another when not locked.
  • the telescopic section of the front swivel leg comprises a locking means, by means of which the telescopic section can be locked or locked in a swung-in and telescoped-in position (hereinafter: first position) relative to the rear swivel leg and in a telescoped-out position (hereinafter: second position) relative to the Pivoting section can be locked or locked.
  • first position a swung-in and telescoped-in position
  • second position telescoped-out position
  • the front pivot leg can be pivoted and/or pivotable relative to the rear pivot leg.
  • the second position can correspond to a completely or almost completely telescoped state of the front pivot leg.
  • both the locking of the two swivel legs as a whole to one another for driving operation (first position) and the locking of the telescopic section with the swivel section (i.e. not with the rear swivel leg) are carried out via the same locking means which is arranged on the telescopic section and moves with it.
  • This locking means therefore fulfills a dual function and takes over the tasks of the previous separate locking devices. This allows per pair of swivel legs (comprising a rear and front pivot leg) a locking means, for example a locking cylinder, can be saved, which reduces the overall weight and costs of the support device.
  • the two pivoting legs cannot be pivoted relative to one another and the front pivoting leg is not telescopic.
  • the swivel legs are secured to the truck-mounted concrete pump for travel and cannot swing out to the side.
  • the front swivel leg is not telescopic but can be swiveled relative to the rear swivel leg.
  • the swivel and telescopic sections are locked or locked together, while the front swivel leg is not fixed or locked relative to the rear swivel leg.
  • This locked second position relates to the working operation of the truck-mounted concrete pump, in which it is intended to ensure that the front pivot legs do not telescope in due to the loads that occur.
  • the pivoting section and the rear pivoting leg each comprise a counter-locking means, wherein the locking means can be brought into engagement with the counter-locking means of the rear pivoting leg in the first position and can be brought into engagement with the counter-locking means of the pivoting section in the second position is.
  • the counter-locking means are in particular firmly arranged on the rear swivel leg and on the swivel section of the front swivel leg, while the locking means moves with the telescopic section. Depending on the position of the telescopic section, it can lock with the first or second counter-locking means.
  • the locking and counter-locking means can be bolts/protrusions and recesses/holes.
  • the locking means can be actively actuated.
  • it can be locked and/or unlocked by active operation.
  • the locking/ Unlocking takes place automatically, for example by a spring, with appropriate overlap with one of the counter-locking means, while unlocking/locking must be actively initiated by appropriate actuation of the locking means.
  • the latter is preferably a locking cylinder, which can in particular be actuated hydraulically (i.e. a hydraulic cylinder).
  • the counter-locking means are passive elements into which the locking means can be introduced.
  • the counter-locking means can be designed as recesses, preferably as bores.
  • the pivot legs are pivotally connected to the frame about a common vertical axis, preferably via a two-part pivot bolt.
  • the latter can include an upper and a lower pivot pin part, which are arranged coaxially and spaced apart from one another.
  • the telescopic section can penetrate the pivot axis in a retracted state and be pivoted through the recess in the rear pivot leg.
  • the front and rear pivot legs can also be pivotally connected to the frame about two axes that are close to one another, which are also preferably realized by two-part pivot bolts. “Lying close to each other” can be understood to mean that the distance between the axes is smaller than the longest part of the telescopic section that projects backwards over the pivoting section.
  • the support device can comprise at least two front and two rear pivot legs.
  • only one locking means can be provided for each pair of front and rear swivel legs, which are arranged in particular on the side of the frame.
  • the locking means is located in the area of the rear end of the telescopic section, which is mounted in the first position within the rear pivot leg. In the second position, the end of the telescopic section is located within the pivoting section and the locking means can be brought into overlap with a corresponding counter-locking means of the pivoting section. In the first position, the end of the telescopic section is located outside the swivel section, so that in the swung-in state it is located within the recess of the rear swivel leg and can be brought into overlap there with a corresponding counter-locking means of the rear swivel leg.
  • the set according to the invention consisting of the at least one front swivel leg and the at least one rear swivel leg can be mounted on a frame of a truck-mounted concrete pump.
  • the present invention further 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 repeat description is omitted here.
  • the truck-mounted concrete pump preferably comprises two pairs of front and rear swivel legs, which are hinged to the frame on opposite sides.
  • the pairs of swivel legs are preferably pivotally connected to the frame about a common vertical axis, in particular via two-part swivel bolts as described above.
  • the truck-mounted concrete pump comprises a distribution boom that can be rotated about a vertical axis and is arranged on a mast frame, wherein the mast frame includes or is connected to the frame.
  • the distribution boom can comprise several segments that can be pivoted relative to one another, along which a concrete line is guided. The forces that occur during operation of the truck-mounted concrete pump are directed into the ground via the distribution boom and the mast trestle or the frame as well as via the support device.
  • the Figure 1 shows an embodiment of the support device according to the invention, the pivot legs 10, 12 of which are in the first position, in a side sectional view along the longitudinal axes of the pivot legs 10, 12.
  • An overall view of the support device with two pairs of pairs of pivot legs 10, 12 articulated laterally to a frame 26 is in the Figure 6 shown in a perspective view.
  • the support device comprises a rear pivot leg 12, which can be pivoted about a vertical axis 20 on one in the Figure 1 frame 26, not shown, is articulated and is not telescopic, and a front pivot leg 10, which is pivotally articulated on the frame 26 about the same axis 20 and is also telescopic (for example by means of a hydraulic cylinder).
  • the front swivel leg 10 comprises a swivel section 14 articulated on the frame 26, which can also be referred to as an extension box, and a telescopic section 16 which is slidably mounted therein.
  • the telescopic section 16 has a support cylinder 22, which can be extended and extended vertically, in particular hydraulically.
  • the rear pivot leg 12 also has such a support cylinder 22 at its end spaced from the axis 20, which in the Figure 1 However, it is not shown (see here Figure 6 ).
  • the telescopic section 16 In the first position, which is in the Figure 1 is shown, the telescopic section 16 is fully retracted into the pivoting section 14 and protrudes backwards beyond the latter.
  • the pivot legs 10, 12 are aligned parallel or coaxial to one another (with respect to their longitudinal axes).
  • the rear pivot leg 12 has an elongated recess 18 which is open towards the axis 20 and accommodates the rear part of the telescopic section 16.
  • the recess 18 is also open to the sides (the area of the rear pivot leg 12, which has the recess 18, is therefore fork-shaped, whereby the fork depth can be less than, more than or essentially half the length of the rear pivot leg), so that the front pivot leg 10 can in principle be pivoted relative to the rear pivot leg 12 even in the retracted state. Whether this is actually possible depends on the geometry of the frame 26. The latter is advantageously designed so that the front pivot leg 10 swings out laterally or the part of the telescopic section 16 that projects backwards can be pivoted inwards (see Figure 6 for a possible frame shape).
  • the two pivot legs 10, 12 are connected via a two-part pivot bolt 24 (see Figure 6 ) is articulated to the frame 26, the upper and lower pivot bolt parts 24 being mounted coaxially to one another in corresponding bolt receptacles of the pivot legs 10, 12.
  • Figure 1 As can be seen, the bolt receptacles of the front swivel leg 10 lie within the bolt receptacles of the rear swivel leg 12.
  • the bolt receptacles of the upper and / or lower swivel bolt parts are at the same height or the bolt receptacles of the rear swivel leg 12 are within the bolt receptacles of the front swivel leg 10.
  • an actively operable locking means 30 is fixedly arranged, which in the exemplary embodiment shown here is a hydraulic locking cylinder 30, which includes a locking pin that can be extended and retracted.
  • the locking cylinder 30 is located on the top of the telescopic section 16 and, in the first position shown here, in which the front swivel leg 10 is completely retracted and swiveled in, covers a hole 32 which acts as a first counter-locking means and which is in the top of the recess 18 of the rear swivel leg 12 is trained.
  • locking means 30 and first counter-locking means 32 can also be arranged at another location, for example on the underside of the telescopic section 16 and the recess 18 or on one of the sides.
  • the locking bolt is extended so that it retracts or bolts into the bore 32.
  • the front swivel leg 10 can then no longer be swung out or telescoped out, so that the swivel legs 10, 12 are secured to the truck-mounted concrete pump for travel.
  • the Figure 2 shows a top view of the front pivot leg 10, which is swung out laterally relative to the rear pivot leg 12 and is still in the retracted state.
  • the arrow marked with the reference number 30 marks the position of the locking bolt 30, which moves with the telescopic section 16. It can also be seen that the retracted telescopic section 16 protrudes into the installation space of the truck-mounted concrete pump, which is below the one in the Figure 2 Pivot legs 10, 12 shown are located.
  • the frame arranged there therefore preferably has corresponding recesses.
  • FIGS 3 and 4 show side longitudinal section views of the telescopic section 16 in the area of the locking cylinder 30, with the front pivot leg 10 in the first position ( Figure 3 ) or in the second position ( Figure 4 ) is located.
  • the hole 32 can be seen in the recess 18 of the rear pivot leg 12, below which the locking cylinder 30 is located. Retracting or extending the locking bolt locks or unlocks the swivel legs 10, 12.
  • the telescopic section 16 is fully extended, so that the rear end with the locking cylinder 30 is located within the pivoting section 14.
  • the central recess of the pivoting section 14, in which the telescopic section 16 is slidably mounted, also has a bore 34 on the top in the area of the end opposite the axis 20, which functions as a second counter-locking means 34.
  • the locking cylinder 30 lies opposite this bore 34. Retracting or extending the locking bolt locks or unlocks the telescopic section 16 and pivoting section 14, while a pivoting movement of the front pivoting leg 10 relative to the rear pivoting leg 12 is possible.
  • the Figure 5 shows a single front pivot leg 10 according to an exemplary embodiment in a completely telescoped state in a perspective view, the locking means 30 not being shown here.
  • the Figure 6 shows an overall view of the support device with two pairs of pivot leg pairs 10, 12 articulated laterally on the frame 26 in a perspective view.
  • the front swivel legs 10 are swung out to the side and fully telescoped out.
  • the forked shape of the rear pivot legs 12 resulting from the recess 18 is clearly visible.
  • the positions of the pivot bolt parts 24, which form the pivot axes 20, are shown.
  • the subframe and tie rods may be considered part of the frame 26 for purposes of the present invention.

Claims (10)

  1. Dispositif de support pour une pompe à béton sur camion comprenant un cadre avec un ensemble selon la revendication 9, dans lequel les jambes pivotantes (10, 12) sont articulées sur le cadre de manière pivotante l'une par rapport à l'autre, la partie pivotante de la jambe pivotante avant (10) étant montée pivotante sur le cadre.
  2. Dispositif de support selon la revendication 1, dans lequel, dans la première position bloquée, les deux jambes pivotantes (10, 12) ne peuvent pas être pivotées l'une par rapport à l'autre et la fonction télescopique de la jambe pivotante avant (10) n'est pas activée et dans lequel, dans la seconde position bloquée, la fonction télescopique de la jambe pivotante avant (10) n'est pas activée mais la jambe pivotante avant peut être pivotée par rapport à la jambe pivotante arrière (12).
  3. Dispositif de support selon la revendication 1 ou 2, dans lequel la partie pivotante (14) et la jambe pivotante arrière (12) comprennent respectivement un contre-moyen de blocage (32, 34), le moyen de blocage (30) pouvant être amené en prise, dans la première position, avec le contre-moyen de blocage (32) de la jambe pivotante arrière (12) et, dans la seconde position, avec le contre-moyen de blocage (34) de la partie pivotante (14).
  4. Dispositif de support selon l'une des revendications précédentes, dans lequel le moyen de blocage (30) peut être actionné activement, le moyen de blocage (30) étant de préférence un vérin de verrouillage en particulier à actionnement hydraulique.
  5. Dispositif de support selon les revendications 3 et 4, dans lequel les contremoyens de blocage (32, 34) sont des éléments passifs, de préférence des évidements, de manière particulièrement préférée des trous, dans lesquels le moyen de blocage (30) peut être introduit.
  6. Dispositif de support selon l'une des revendications précédentes, dans lequel les jambes pivotantes (10, 12) sont articulées sur le cadre de manière pivotante autour d'un axe (20) vertical commun, de préférence par le biais d'un axe de pivotement divisé en deux.
  7. Dispositif de support selon l'une des revendications précédentes, dans lequel un seul moyen de blocage (30) est prévu ou dans lequel le dispositif de support comprend au moins deux jambes pivotantes avant et deux jambes pivotantes arrière (10, 12) et un seul moyen de blocage (30) est prévu respectivement pour chaque paire de jambes pivotantes avant et arrière (10, 12).
  8. Dispositif de support selon l'une des revendications précédentes, dans lequel le moyen de blocage (30) se trouve dans la zone de l'extrémité arrière de la partie télescopique (16), ladite extrémité étant montée, dans la première position, à l'intérieur de la jambe pivotante arrière (12).
  9. Ensemble pour un dispositif de support d'une pompe à béton sur camion comprenant un cadre, comprenant
    - au moins une jambe pivotante avant (10) et
    - au moins une jambe pivotante arrière (12),
    dans lequel les jambes pivotantes sont articulées sur le cadre de manière pivotante l'une par rapport à l'autre, dans lequel la jambe pivotante avant est télescopique et comprend une partie pivotante qui peut être montée de manière pivotante sur le cadre avec au moins une partie télescopique montée coulissante dans celle-ci et dans lequel, dans un état monté de l'ensemble sur le cadre, la partie télescopique peut être, dans un état escamoté, montée au moins en partie dans un évidement de la jambe pivotante arrière,
    caractérisé en ce que
    la partie télescopique comprend un moyen de blocage, au moyen duquel la partie télescopique peut, dans un état monté de l'ensemble sur le cadre, être bloquée par rapport à la jambe pivotante arrière dans une première position rabattue et escamotée, et bloquée par rapport à la partie pivotante dans une seconde position déployée.
  10. Pompe à béton sur camion comportant un dispositif de support selon l'une des revendications 1 à 8, dans laquelle la pompe à béton sur camion comprend de préférence, articulées sur le cadre sur des côtés opposés, deux paires constituées respectivement d'une jambe pivotante avant et une jambe pivotante arrière (10, 12) et/ou un support de mât avec un mât distributeur comprenant le cadre ou relié au cadre.
EP22165017.9A 2021-04-30 2022-03-29 Dispositif de support pour une pompe à béton sur camion Active EP4083346B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021111242.7A DE102021111242A1 (de) 2021-04-30 2021-04-30 Abstützvorrichtung für eine Autobetonpumpe

Publications (2)

Publication Number Publication Date
EP4083346A1 EP4083346A1 (fr) 2022-11-02
EP4083346B1 true EP4083346B1 (fr) 2023-11-08

Family

ID=80978980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22165017.9A Active EP4083346B1 (fr) 2021-04-30 2022-03-29 Dispositif de support pour une pompe à béton sur camion

Country Status (2)

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EP (1) EP4083346B1 (fr)
DE (1) DE102021111242A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29811097U1 (de) * 1998-06-20 1998-08-20 Waitzinger Baumaschinen Vertri Fahrbare Betonpumpe
DE102005007522A1 (de) 2005-02-17 2006-08-31 Putzmeister Ag Stützausleger für fahrbare Arbeitsmaschinen
DE102012215534A1 (de) 2012-08-31 2014-03-06 Putzmeister Engineering Gmbh Verriegelungsvorrichtung
DE102018110391A1 (de) 2018-04-30 2019-10-31 Liebherr-Betonpumpen Gmbh Autobetonpumpe und Schwenkbein für eine Autobetonpumpe
DE102018127828A1 (de) * 2018-11-07 2020-05-07 Liebherr-Betonpumpen Gmbh Autobetonpumpe

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EP4083346A1 (fr) 2022-11-02
DE102021111242A1 (de) 2022-11-03

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