EP4263412B1 - Construction de support - Google Patents

Construction de support

Info

Publication number
EP4263412B1
EP4263412B1 EP22714447.4A EP22714447A EP4263412B1 EP 4263412 B1 EP4263412 B1 EP 4263412B1 EP 22714447 A EP22714447 A EP 22714447A EP 4263412 B1 EP4263412 B1 EP 4263412B1
Authority
EP
European Patent Office
Prior art keywords
introduction device
load introduction
supporting
support leg
box
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
EP22714447.4A
Other languages
German (de)
English (en)
Other versions
EP4263412A1 (fr
Inventor
Matthias Braun
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.)
Putzmeister Engineering GmbH
Original Assignee
Putzmeister Engineering GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Putzmeister Engineering GmbH filed Critical Putzmeister Engineering GmbH
Publication of EP4263412A1 publication Critical patent/EP4263412A1/fr
Application granted granted Critical
Publication of EP4263412B1 publication Critical patent/EP4263412B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes

Definitions

  • the present invention relates to a support structure for a working machine, in particular one comprising a mast.
  • Support structures of the type mentioned above serve to stabilize working machines equipped with a mast, particularly a boom assembly comprising several mast arms.
  • the support legs of the support structure are retracted into a support leg box to save space, so that they do not protrude or only protrude minimally when the machine is moved to another location.
  • the working machine for example a mobile concrete pump
  • the extended support leg often has to absorb considerable forces, which are transferred via the support leg box and directed to the ground.
  • the force is typically transferred from the support leg box to the support leg at two points: the support leg rests against the top of the support leg box in the area of the opening and is supported at its rear end on the bottom of the support leg box.
  • a support device for support frames with projecting loads which discloses the preamble of claim 1, is known, in which upper load introduction blocks are provided on an inner side of the support leg box in the area of its opening, and lower load introduction blocks are fixedly arranged at a distance therefrom inside the support leg box.
  • the load introduction blocks are screwed or bolted on.
  • the support leg can be multi-part, e.g., designed as a telescopic leg.
  • Figure 1 shows a schematic perspective view illustrating a support structure 10 for a working machine with a mast.
  • the support structure 10 comprises, in a manner known per se, a support leg box 12, which is integrated into a bearing block 14 for the mast.
  • the support leg box 12 is open towards a front face 16 and is designed as a box- or cuboid-shaped hollow body.
  • the support leg box 12 accommodates a support leg 20, which has a hollow body 24 extending in a longitudinal direction 22 and being displaceable in the longitudinal direction 22 within the support leg box 12, as well as a downwardly projecting support foot 26 mounted at a front end of the hollow body 24.
  • the illustration of the Figure 1 The figure shows the support leg 20 in a partially extended position.
  • the support leg 20 has a length L and, in a fully retracted position, is received in the support leg housing 12 with substantially its entire length L (projections through the open front 16 and possibly also through an open rear side, not shown, are possible).
  • the support leg 20 can be moved out of the support leg housing 12 by a maximum extension length A by sliding it through the open front 16 of the support leg housing 12.
  • a residual length D which substantially corresponds to the entire length L minus the maximum extension length A, remains in the support leg housing 12 (see figure).
  • Figures 2 and 3 The invention allows for any partially extended intermediate positions of the support leg.
  • the hollow body 24 of the support leg 20 can be composed of two spaced-apart, parallel web plates 64 and two spaced-apart, parallel chord plates 60, 62 connecting the web plates 64, namely an upper chord 60 and a lower chord 62, in particular by welding.
  • the support leg box 12 is accordingly composed of two spaced-apart, parallel web plates 54 and two spaced-apart The web plates 54 are connected parallel to each other by the chord plates 50, 52, namely an upper chord 50 and a lower chord 52, in particular by welding.
  • the support leg box 12 has a first load introduction device 30 in the area of its open front 16.
  • the first load introduction device 30 can be designed in a manner known per se as an essentially U-shaped reinforcing bracket, open at the bottom and having a base 40 and free legs 42 projecting downwards from the base 40.
  • a bottom surface of the base 40 forms a support surface 44, against which the upper chord 60 of the support leg 20 is supported, as described in more detail below (see below).
  • Figure 6 When the support leg 20 bears a load during operation, its upper chord 60 rests against the support surface 44.
  • Other configurations of the first load application device 30 are possible.
  • the U-shaped reinforcing bracket can not only be arranged in front of the upper chord 50 (as shown and described) and form the support surface 44 there, but it is also possible to place the reinforcing bracket on the upper chord so that the force is transferred through the upper chord to the base 40 of the bracket. Furthermore, it is possible, as The following describes how to arrange the first load introduction device in the area of the side surface (webs) of the support leg box.
  • the support leg box 12 has a single second load application device 32 inside.
  • the second load application device 32 is arranged in the support leg box 12 at a given distance D from the front 16 of the support leg box 12.
  • the given distance D essentially corresponds to the described residual length with which the support leg 20 remains in the support leg box 12 in its fully extended position.
  • this "residual length" is approximately 20 to 30% of the extension length. This ensures that, when a load is applied during operation, the support leg 20 can (still) be supported with a rear end 28 on a support surface 34 of the second load application device 32.
  • the second load introduction device 32 is designed as one or more continuous recess(s) provided for this purpose in the wall (web plates 54 and/or bottom chord 52) of the support leg box (see e.g. Figure 6 and 9
  • the second load introduction device 32 is designed such that its support surface 34 projects towards a surface of the lower chord, as can be seen in particular from the Figure 6 , 8 and 9 This is evident.
  • This overhang or "raise” serves to prevent the support leg from potentially bearing stress on points of the lower chord that are not designed for load distribution when moved into the retracted position (the invention deliberately omits the design of further load distribution points in the support leg box).
  • the described rise is Depending on the dimensions (especially the length) of the support leg, approximately 20 to 50 mm . A professional will readily select a suitable riser within the scope of their expertise.
  • the position of the support point formed by the second load application device 32 is determined, as already described, at a distance in the longitudinal direction 22 from the front face 16 of the support leg box.
  • the second load application device 32 can, for example, have a support surface 34 extending transversely (perpendicularly or at an angle other than 90° or less than 90°) to the longitudinal direction 22.
  • the second load application device 32 can have several support surfaces 34 arranged at the given distance from the front face on the circumference of the support leg box on its lower chord 52 and/or its web plates 54.
  • the second load introduction device 32 can be designed similarly to the first load introduction device 30 as an essentially U-shaped bracket, open at the top and comprising a base 46 and free legs 48 projecting upwards from the base 46 (cf. e.g. Figure 6
  • the upper surface of the base 46 forms the support surface 34.
  • the base 46 of the bracket can be – as shown in the Figure 6 visible - reach through the lower chord 52 of the support leg box.
  • the support structure 10 further comprises in the support leg 20 a reinforcing element 36 extending substantially over the length L of the support leg 20.
  • the reinforcing element 36 is designed to rest on the support surface 34 of the single second load introduction device 32.
  • the reinforcement element 36 can be designed in a variety of ways.
  • the reinforcement element 36 can be formed by a reinforcement plate of the lower chord 62 extending over essentially the entire length of the support leg 20.
  • the reinforcing element 36 can be formed by two reinforcing strips extending along the respective butt edges of the web plates 64 with the bottom flange 62. In this case, it would be a multi-part reinforcing element 36, the parts of which each extend over essentially the entire length of the support leg 20.
  • the reinforcing element 36 can be formed by suitable material reinforcements or widenings of the web plates 64 in the area of the connection with the bottom flange 62, as is the case, for example, in the Figure 9 This is illustrated.
  • the reinforcing element 36 can of course also be formed by suitable material reinforcements or widenings of the base material 62 in the area of the connection with the web plates 64.
  • the design of the reinforcement element 36 as extending essentially over the entire length of the support leg 20 gives the invention a high degree of desired flexibility, since any extension position of the support leg 20 is now possible with load transfer downwards always guaranteed via the single second load introduction device 32.
  • the support leg 20 also has an upper chord reinforcement extending essentially over the entire length of its upper chord 60.
  • the design of the upper chord reinforcement is governed by the above description in connection with the reinforcement element 36.
  • the second load introduction device 32 is not primarily formed in the lower chord 52 of the support leg box 12, but rather in its lateral web plates 54.
  • a reinforcing pin with a support surface 34 can be provided on or in each of the two opposing web plates 54 (each at the given distance D from the front of the support leg box 12).
  • the reinforcing pins can, but do not have to, be arranged at the same height (in principle, the two pins can be arranged at different heights; in this case, the longitudinally extending reinforcements on the left and right of the support leg must also be arranged at different heights).
  • the second load introduction device 32 is designed in multiple parts in this case.
  • the reinforcing pins The second load introduction device 32 can each be inserted into the provided continuous recesses in the web plate and welded in place. On the outside, the second load introduction device 32 can be essentially flush with the web plate 54, while on the inside it projects sufficiently far into the support leg box to form a suitable support surface 34.
  • the front face 16 of the support leg box is not perpendicular to the longitudinal axis of the support leg (i.e., the longitudinal direction 22). This can result in the first (upper) load application device running "obliquely" to the support leg (i.e., at an angle other than 90° to the longitudinal direction 22, in particular an angle less than 90°, e.g., between 0° and 60°).
  • the support surface formed by the second load application device (either from one element as in the first embodiment or from two elements as in the second embodiment) runs essentially perpendicular to the longitudinal axis of the support leg; then the distances of the support surface on the left and right of the side faces (webs) of the support leg are different.
  • the "given distance D" is to be understood as an average value, e.g., calculated along the central axis of the support arrangement.
  • the support surface formed by the second load introduction device (either from one element as in the first embodiment or from two elements as in the second embodiment)
  • the load application device also runs obliquely to the longitudinal axis of the support leg, either at the same angle as the first load application device or at a different angle; in this case, the distances to the left and right can be either the same (same angle) or again different (different angle). In this case as well, it is convenient to consider the "given distance D" as an average value, e.g., calculated along the central axis of the support arrangement.
  • the essential aspect of the invention is that exactly one load application device is provided inside the support leg housing, which, in its transverse extension (towards the longitudinal axis of the leg), does not necessarily have to have the same orientation (with respect to the longitudinal direction) as the first load application device (i.e., it runs obliquely to it).
  • the reinforcing element 36 which extends essentially over the length of the support leg, is not located in the area of the lower chord 62 in this embodiment, but rather at a height adapted to the position of the described reinforcing pins of the second load introduction device 32 on the web plates 64 of the support leg 20.
  • the reinforcing element 36 can be extended upwards in height to the area of the upper chord 60 and thus additionally fulfill the function of the previously described upper chord reinforcement.
  • Figure 13 Another variant is in Figure 13 shown.
  • the first load introduction device 30 – as already indicated – is not located in the area of the upper chord 50 of the support leg box, but on the webs/web plates 54. This also allows the use of the reinforcement element. 36 both for upward load transfer and downward load transfer.
  • the Figures 14a, 14b and 14d Figure 36 illustrates alternative designs of the support leg hollow profile with reinforcing elements inserted or attached (into designated recesses or into a space between the two stacked U-profiles).
  • the hollow body can be constructed in two parts.
  • Figures 14a and 14b They show a variant with two essentially U-shaped edge profiles, whose openings point towards each other, and which are joined and welded together with the legs (to form the webs or web plates).
  • a plate is welded onto an upright U-profile as a top chord.
  • the invention extends not only to one-piece support legs 20, as shown in the schematic representations of the Figures 2 and 3 are described, but also include multi-part extendable support legs, especially telescopic legs. Such designs are analogous to the Figures 2 and 3 in the Figures 4 or 5 shown.
  • Figure 1 shows embodiments with two-part telescopic legs consisting of an extendable leg guided in a telescopic housing, the telescopic housing being slidably mounted in the support leg housing.
  • the hollow body 24 of the previous support leg now serves as a telescopic housing 20.1 to accommodate an extendable leg 20.2 with a smaller cross-section, which is slidably mounted longitudinally within it. This results in load transfer not only in the support leg housing 12 for the telescopic housing 20.1 (the original single support leg), but also Load transfers must also be provided in the telescopic box 20.1 for the additional extension leg 20.2.
  • the exemplary embodiment of Figure 9 a variant that is located between the support leg box 12 and the telescopic box 20.1 of the first embodiment according to Figure 2 makes use of, while for the load transfers between the extension leg 20.2 and the telescopic box 20.1 a prior art design (see e.g. DE 10 2014 014 038 A1 ) known design is applied.
  • a prior art design see e.g. DE 10 2014 014 038 A1
  • the material thickenings forming the reinforcing element 36 extending over the length L of the support leg in the transition area between the web plates 64.1 and the lower chord 62.1 of the telescopic box 20.1 simultaneously serve inwards as support surfaces for downwardly extended webs 66 of the web plates 64.2 of the extension leg 20.2.
  • Figure 10 shows a telescopic leg variant of the embodiment of Figure 3 with a support leg box 12, a telescopic box 20.1 which is slidably mounted therein in the longitudinal direction and an extension leg 20.2 which is in turn slidably mounted in the telescopic box 20.1 in the longitudinal direction.
  • the support leg box 12 shows - as already mentioned in connection with the Figure 3 described - a second load introduction device 32 in the web plates 54.
  • a clamp 33 extending over the height of the web plate 54 can be provided on the outside of the web plate 54, which is supported on overhangs of the upper chord and the lower chord and serves to improve force transmission.
  • the telescopic box 20.1 has a reinforcing element 36.1 extending substantially along its length, formed by "rails" (so-called web plate reinforcements) applied to both sides of the web plates 64.1, which are designed to bear on the support surfaces 34 of the second load introduction device 32.
  • the rails forming the reinforcing element 36.1 extend upwards to projections 61.1 of the upper chord 60.1, to which they are welded (see also the illustration of the Figure 12 The rails thus come into contact with the Figure 3 described dual function of increasing the force transmission both towards the first load introduction device 30 and the second load introduction device 32.
  • pins forming a second load introduction device 32' are located with Support surfaces 34' recessed (see also Figures 11 and 12 ), and the extension leg 20.2 has a reinforcing element 36.2 extending substantially along its length, which is formed by rails applied to both sides of the web plates 64.2 and designed to rest on the support surfaces 34' of the second load introduction device 32'.
  • the rails forming the reinforcing element 36.2 extend upwards to projections 61.2 of the upper chord 60.2, to which they are welded (see also the illustration of the Figure 12 ).
  • a single load application point is provided in the support leg box, with the result that only one load application point needs to be calculated, which significantly reduces the computational effort for the support leg box.
  • the single load application point in the support leg box means a force flow direction independent of the leg position (regardless of the leg position, the same two front and rear load application points are always used, in contrast to, for example, the DE 10 2014 014 038 A1 ), so that there are very few parts or areas subject to force.
  • the fact that reinforcement is only necessary at one point has a positive effect on the cost and weight of the structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Jib Cranes (AREA)

Claims (13)

  1. Construction de support (10) pour une machine de travail présentant un mât comprenant un caisson de béquille (12), ouvert vers un côté avant (16), et une béquille (20) qui est montée dans le caisson de béquille (12) de manière décalable dans une direction longitudinale (22) pour un déplacement entre une position entièrement rentrée et une position entièrement sortie d'une longueur d'extension maximum (A),
    dans laquelle le caisson de béquille (12) présente, dans la zone du côté avant ouvert (16), un premier moyen d'introduction de charge (30) et, à une distance donnée (D) du côté avant (16) dans l'intérieur du caisson de béquille, un second moyen unique d'introduction de charge (32) comprenant au moins une surface de support (34), et
    dans laquelle la béquille (20) présente un élément de renforcement (36), s'étendant sensiblement sur une longueur (L) de la béquille (20), qui est réalisé pour un appui sur ladite au moins une surface de support (34) du second moyen unique d'introduction de charge (32),
    caractérisée en ce que
    le second moyen unique d'introduction de charge (32) est réalisé de telle sorte qu'il s'engage dans un ou plusieurs évidements traversants prévus à cet effet dans une paroi (52, 54) du caisson de béquille (12) et la surface de support (34) du second moyen d'introduction de charge (32) est en saillie par rapport à une surface intérieure du caisson de béquille (12).
  2. Construction de support (10) selon la revendication 1, dans laquelle le premier moyen d'introduction de charge (30) est réalisé, dans la zone du côté avant ouvert (16), comme renfort d'une ceinture supérieure (50) et/ou d'au moins une tôle d'âme (54) du caisson de béquille (12).
  3. Construction de support (10) selon la revendication 1 ou 2, dans laquelle le second moyen unique d'introduction de charge (32) est réalisé comme renfort d'une ceinture inférieure (52) et/ou d'au moins une tôle d'âme (54) du caisson de béquille (12).
  4. Construction de support (10) selon l'une des revendications 1 à 3, dans laquelle la distance donnée (D) correspond sensiblement à la longueur (L) de la béquille (20) moins la longueur d'extension maximum (A).
  5. Construction de support (10) selon l'une des revendications 1 à 4, dans laquelle l'élément de renforcement (36) est réalisé en outre pour agir sur le premier moyen d'introduction de charge (30).
  6. Construction de support (10) selon l'une des revendications 1 à 5, dans laquelle le second moyen unique d'introduction de charge (32) est réalisé en plusieurs pièces.
  7. Construction de support (10) selon l'une des revendications 1 à 6, dans laquelle le second moyen unique d'introduction de charge (32) présente une surface de support (34) s'étendant transversalement à la direction longitudinale (22).
  8. Construction de support (10) selon l'une des revendications 1 à 7, dans laquelle le second moyen unique d'introduction de charge (32) présente plusieurs surfaces de support (34) agencées à la distance donnée (D) du côté avant (16) en étant réparties au niveau d'une périphérie du caisson de béquille (12).
  9. Construction de support (10) selon la revendication 7 ou 8, dans laquelle lesdites une ou plusieurs surfaces de support (34) sont réalisées au niveau d'une ceinture inférieure (52) et/ou au niveau d'une tôle d'âme (54).
  10. Construction de support (10) selon l'une des revendications 1 à 9, dans laquelle la surface de support (34) s'étend sous un angle de 90° par rapport à la direction longitudinale (22) ou dans laquelle la surface de support (34) s'étend sous un angle qui n'est pas égal à 90° par rapport à la direction longitudinale (22).
  11. Construction de support (10) selon l'une des revendications 1 à 10, dans laquelle une extension transversale du second moyen unique d'introduction de charge (32) s'étend parallèlement au côté avant (16) du premier moyen d'introduction de charge (30) ou dans laquelle une extension transversale du second moyen unique d'introduction de charge (32) n'a pas la même orientation que le côté avant (16) du premier moyen d'introduction de charge (30).
  12. Construction de support (10) selon l'une des revendications 1 à 11, dans laquelle la distance donnée (D) est déterminée dans une direction longitudinale (22) le long d'un axe central du caisson de béquille (12) depuis le côté avant (16) du premier moyen d'introduction de charge (30) jusqu'à un point d'intersection de l'axe central avec l'extension transversale du second moyen unique d'introduction de charge (32).
  13. Construction de support (10) selon l'une des revendications 1 à 12, dans laquelle le second moyen unique d'introduction de charge (32) est réalisé sous une forme d'étrier sensiblement en forme de U qui est ouvert vers le haut.
EP22714447.4A 2021-03-18 2022-03-16 Construction de support Active EP4263412B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021106729.4A DE102021106729A1 (de) 2021-03-18 2021-03-18 Stützkonstruktion
PCT/EP2022/056832 WO2022194935A1 (fr) 2021-03-18 2022-03-16 Construction de support

Publications (2)

Publication Number Publication Date
EP4263412A1 EP4263412A1 (fr) 2023-10-25
EP4263412B1 true EP4263412B1 (fr) 2026-01-28

Family

ID=81260127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22714447.4A Active EP4263412B1 (fr) 2021-03-18 2022-03-16 Construction de support

Country Status (7)

Country Link
US (1) US20240166478A1 (fr)
EP (1) EP4263412B1 (fr)
JP (1) JP2024511576A (fr)
KR (1) KR20230157982A (fr)
CN (1) CN117295678A (fr)
DE (1) DE102021106729A1 (fr)
WO (1) WO2022194935A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102024106887A1 (de) * 2024-03-11 2025-09-11 Putzmeister Engineering Gmbh Betonförderfahrzeug

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719403A (en) * 1970-11-17 1973-03-06 Kidde & Co Walter Crane boom having wear pads
JPS6028563U (ja) * 1983-08-03 1985-02-26 株式会社神戸製鋼所 アウトリガ装置
US4809615A (en) * 1988-02-16 1989-03-07 Kershaw Manufacturing Co., Inc. Method and apparatus for re-railing working platforms
JP3509453B2 (ja) * 1997-03-21 2004-03-22 コベルコ建機株式会社 アウトリガ装置
DE202004011443U1 (de) 2004-07-21 2004-10-07 Anton Ruthmann Gmbh & Co. Kg Abstützvorrichtung für Traggestelle mit vorkragenden Lasten
DE102004035416B4 (de) 2004-07-21 2015-12-31 Ruthmann Gmbh & Co. Kg Abstützvorrichtung für Traggestelle mit vorkragenden Lasten
DE102014014038A1 (de) 2014-09-26 2016-03-31 Putzmeister Engineering Gmbh Stützbein und Stützkonstruktion für eine Arbeitsmaschine

Also Published As

Publication number Publication date
WO2022194935A1 (fr) 2022-09-22
KR20230157982A (ko) 2023-11-17
CN117295678A (zh) 2023-12-26
JP2024511576A (ja) 2024-03-14
EP4263412A1 (fr) 2023-10-25
US20240166478A1 (en) 2024-05-23
DE102021106729A1 (de) 2022-09-22

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