EP1719675B1 - Système d'entrainement de la séquence d'ouverture et fermeture de stabilisateurs télescopiques a éléments multiples d'une machine automobile - Google Patents

Système d'entrainement de la séquence d'ouverture et fermeture de stabilisateurs télescopiques a éléments multiples d'une machine automobile Download PDF

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Publication number
EP1719675B1
EP1719675B1 EP05425282.0A EP05425282A EP1719675B1 EP 1719675 B1 EP1719675 B1 EP 1719675B1 EP 05425282 A EP05425282 A EP 05425282A EP 1719675 B1 EP1719675 B1 EP 1719675B1
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EP
European Patent Office
Prior art keywords
cam
resting
intermediate member
pin
stabiliser
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Application number
EP05425282.0A
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English (en)
French (fr)
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EP1719675A1 (de
Inventor
Davide Cipolla
Antonino Luppino
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COMPAGNIA ITALIANA FORME ACCIAIO S P A
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COMPAGNIA ITALIANA FORME ACCIAIO S P A
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Publication of EP1719675A1 publication Critical patent/EP1719675A1/de
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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 driving device to achieve the extraction, according to a preset sequence, of the various moving elements making up the telescopic stabilisation beam of a self-propelled machine, such as in particular a concrete pump or a truck mixer pump for concrete.
  • a self-propelled machine such as in particular a concrete pump or a truck mixer pump for concrete.
  • telescopic stabilisers horizontal telescopic stabilising beams (fixed or pivoting about vertical axes, and in the following simply referred to as "telescopic stabilisers"), provided with terminal feet, which are stabilisers that in a retracted position are comprised within the machine perimeter, and in an extended condition allow to achieve stabilisation of the machine itself during operational shifts of the foldable arm and operation of the concrete pump.
  • Each telescopic stabiliser is provided with multiple mobile elements (typically between one and three) which slide telescopically one inside the other so that, in the stabiliser position of maximum extension, the smallest member is located at the free end of the stabiliser itself. In this case there is the problem of the sequence of extraction (opening) and retraction (closing) of the stabiliser.
  • the extraction sequence of the individual elements is of no particular importance, i.e. it does not detect if the first member to move outwards is the largest or smallest one, since once stabiliser extension has been completed the individual elements are all in the position of maximum extension and hence in the correct position from the largest to the smallest one, moving outwards.
  • the stabilisers are then to be retracted, starting from the condition of maximum extension, when casting operations have ended and the machine is to be moved to a different site. Even in this case it is important for retraction to occur in a controlled manner, i.e. starting from the smallest elements (which means in the opposite sequence to the extension one).
  • the movement of the individual stabiliser elements which may be extracted is normally achieved by hydraulic actuating systems arranged between such elements and the largest member of the stabiliser, or fixed element.
  • the extractable elements are more than one, according to the known art it is hence possible to achieve movement thereof in a desired sequence only by using multiple oleodinamic cylinder-piston assemblies, one for each extractable element, said cylinder-piston assemblies requiring also a control and monitoring system which determines prompt actuation thereof, which system consists of corresponding separate actuation devices, or of a single actuation device provided with multiple sequence valves, or of differentiated thrust areas of the cylinder-piston assemblies.
  • a driving system comes with bulk problems, remarkable hydraulic complexity and extremely high costs.
  • JP-A-51151922 discloses a driving system for a three-member stabilizer which has the features defined in the preamble of the main claim of the present invention.
  • the mechanical device disclosed in this document has a complex and bulky structure. Besides the fixing pin cooperates with a hole opened outside, susceptible of soiling, blocking or damaging.
  • a telescopic stabiliser comprising three elements - one fixed and two which may be extracted, the smallest extractable member bearing at its free end the resting foot - is diagrammatically shown in the drawings, which stabiliser incorporates the driving device of the present invention.
  • Such device consists of the combination of a single actuating device, normally an oleodinamic cylinder/piston assembly, which is directly arranged between the fixed member and the smallest extractable element, or resting element, and a mechanical structure apt to render alternately mutually fixed two of the three elements, thereby allowing the actuating device to determine the shifting of a single member at a time. Thanks to the particular mechanical structure adopted, the different elements are left free to shift sequentially, and precisely starting from the largest member down to the smallest one during the opening movement of the telescopic stabiliser, and viceversa during the closing movement.
  • Fig. 1 shows an overall diagrammatic view of a telescopic stabiliser for self-propelled machines, incorporating the driving system of the present invention, or more precisely, exclusively the particular mechanical structure which allows to obtain extraction of the different members in the desired sequence in a fully automatic way and independently from the actuation of the elements themselves.
  • the actuating means of the stabiliser nor the attachment means of the same to the machine frame are shown.
  • the stabiliser shown in fig. 1 hence comprises a larger member A, also indicated as “fixed member” since it is integral with or hinged to the self-propelled machine and consequently has no degree of freedom in the longitudinal direction of the stabiliser.
  • a middle-sized member B is slidingly housed and, within the latter, smallest member C.
  • a foot P is fixed having an adjustable height and a structure well-known per se and hence shown only in an extremely diagrammatic way in the drawings. For this reason member C is also referred to as "resting member” in the present description.
  • the particular mechanical structure of the driving device of the present invention consists of a double cam hook of a special design pivoting about intermediate member B and of guide or grip elements integral with fixed member A and with resting member C.
  • the special construction and position of such elements will now be described in detail with reference to figs. 2 to 5 , wherein the individual members of the stabiliser are shown separately.
  • Fixed member A shown in figs. 2 , has a longitudinal guide 1, consisting of a metal section bar integral with a vertical inner wall of member A extending along the same, and a gripping pin 2 fixed to the same wall of member A, at the free end of such member where intermediate member B comes in.
  • Intermediate member B shown in figs. 3 , is equipped with a double cam hook 3, idly pivoting in 3p about the vertical wall of member B adjacent to the wall of member A which bears guide 1 and pin 2, as well as with a stop 4 apt to cooperate with cam 3a to limit the travel thereof both in one direction and in the opposite one, to an arc of a circle slightly larger than 90°.
  • Hook 3 comprises cams 3a and 3c, respectively arranged on both sides of the wall of member B whereto hook 3 is hinged.
  • cams 3a and 3c have a profile design comprising a deep throat 5a, 5c for engagement with pins 2 and 7, respectively, projecting from the walls of the other members A and C of the telescopic stabiliser; cam 3a further has a planar part 6 of its profile apt to slidingly cooperate with guide 1.
  • the utterly simple mechanical structure described above is completely sufficient to guarantee automatic sequential extraction of the different members of the stabiliser, combined with a single actuating device apt to drive the shiftings of the end resting member of the stabiliser against the fixed member.
  • the different steps of the opening sequence of the stabiliser are shown in detail in figs. 6A to 6E with reference to the different positions taken up by the guide and grip elements described above, and to the different functions performed thereby.
  • the stabiliser In the initial step, shown in fig. 6A , the stabiliser is fully closed, that is its members are completely housed one inside the other. In this step, cam 3c hooks with throat 5c pin 7 of resting member C, while rotation of cam 3 is prevented by the fact that the planar part 6 of cam 3a rests on guide 1. Members B and C are therefore mutually fixed and actuation of the cylinder-piston assembly arranged between fixed member A and resting member C determines the extraction of intermediate member B from member A, as shown in fig. 6B , while cam 3a slides on guide 1.
  • cam 3 has completed its own rotation ending up resting with planar part 6 against pin 4.
  • throat 5c of cam 3c is arranged with its axis in a horizontal position so as to free pin 7 of resting member C to sliding in such direction. Further actuation of the cylinder-piston assembly hence leads to full extraction of this member also ( fig. 6E ).
  • the entire opening step of the stabiliser has hence occurred according to the desired extraction sequence, i.e. starting from the largest extractable member (in the illustrated case, intermediate member B), to end with the smallest member or resting member C.
  • the object of the invention has hence been fully achieved.
  • the system of the invention is not limited to the use in stabilisers with three members only as the one shown in the drawings, but also in stabilisers with a larger number of members.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)

Claims (3)

  1. Antriebsvorrichtung zum Antrieb der Öffnungs-/Schließungs-Sequenz von aus mehreren Elementen bestehenden teleskopischen Stabilisatoren für eine selbstangetriebene Maschine, wobei die aus mehreren Elementen bestehenden teleskopischen Stabilisatoren ein größtes Element oder feststehendes Element (A), welches integral mit dem Maschinenrahmen konfiguriert ist, ein oder mehrere Zwischenelemente (B) und ein kleinstes Element oder ruhendes Element (C), welches einen Fuß (P) an seinem freien Ende trägt, umfasst, wobei die Vorrichtung wenigstens eine Betätigungs-Zylinder-Kolben-Anordnung umfasst, die zwischen dem feststehenden Element (A) und dem ruhenden Element (C) angeordnet ist, dadurch gekennzeichnet, dass die Vorrichtung ferner umfasst:
    - einen Doppelsteuerkurven-Haken (3), welcher zwei Steuerkurven (3a, 3c) aufweist, die jeweils von einer jeweiligen Seite einer vertikalen Wand des Zwischenelements (B) vorspringen und träge um einen Bolzen (3p), welcher an der Wand des Zwischenelements (B) vorgesehen ist, drehbar gelagert sind;
    - ein erstes Bolzenelement (7), welches von der Wand des ruhenden Element (C) nach außen vorspringt, selektiv mit einer ersten Steuerkurve (3c) der beiden Steuerkurven (3a, 3c) kuppelbar ist, um das Zwischenelement (B) und das ruhende Element (C) während der Auszugsbewegung des Zwischenelements (B) miteinander zu verkuppeln, und von der ersten Steuerkurve (3c) auskuppelbar ist, wenn das Zwischenelement (B) seine maximale ausgezogene Position erreicht hat;
    - ein zweites Bolzenelement (2), welches von der Wand des feststehenden Elements (A) nach innen vorspringt, selektiv mit einer zweiten Steuerkurve (3a) der beiden Steuerkurven (3a, 3c) kuppelbar ist, um das Zwischenelement (B) und das feststehende Element (A) während der Rückzugsbewegung des ruhenden Elements (C) miteinander zu verkuppeln, und von der zweiten Steuerkurve (3a) auskuppelbar ist, wenn das ruhende Element (C) seine maximale zurückgezogene Position erreicht hat;
    - ein längsverlaufendes Führungselement (1), welches an der Innenwand des feststehenden Elements (A) vorgesehen ist, und auf welchem ein ebenflächiger Abschnitt (6) der zweiten Steuerkurve (3a) für ein erstes Stück der Auszugsbewegung und für ein letztes Stück der Rückzugsbewegung des Zwischenelements (B) gleiten kann, wobei das Führungselement (1) eine Länge aufweist, die so voreingestellt ist, dass seine unterstützende Wirkung gegenüber der zweiten Steuerkurve (3a) endet, wenn die Steuerkurve (3a) beginnt, in das zweite Bolzenelement (2) einzukuppeln, wodurch eine Rotation des Doppelsteuerkurven-Hakens (3) bewirkt wird.
  2. Antriebsvorrichtung gemäß Anspruch 1, wobei jede der Steuerkurven (3a, 3c) eine tiefe Einkehlung (5a, 5c) zur Kupplung mit den jeweiligen Bolzenelementen (2, 7) umfasst.
  3. Antriebsvorrichtung gemäß Anspruch 1 oder 2, wobei das Zwischenelement (B) ein Stoppelement (4) umfasst, welches imstande ist, mit der zweiten Steuerkurve (3a) zusammenzuwirken, um deren Rotation in eine Richtung und in die entgegengesetzte Richtung auf einen Kreisbogen von etwas mehr als 90° zu begrenzen.
EP05425282.0A 2005-05-03 2005-05-03 Système d'entrainement de la séquence d'ouverture et fermeture de stabilisateurs télescopiques a éléments multiples d'une machine automobile Active EP1719675B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05425282.0A EP1719675B1 (de) 2005-05-03 2005-05-03 Système d'entrainement de la séquence d'ouverture et fermeture de stabilisateurs télescopiques a éléments multiples d'une machine automobile

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Application Number Priority Date Filing Date Title
EP05425282.0A EP1719675B1 (de) 2005-05-03 2005-05-03 Système d'entrainement de la séquence d'ouverture et fermeture de stabilisateurs télescopiques a éléments multiples d'une machine automobile

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EP1719675A1 EP1719675A1 (de) 2006-11-08
EP1719675B1 true EP1719675B1 (de) 2015-11-18

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102381291B (zh) * 2011-09-14 2014-09-10 三一汽车制造有限公司 一种伸缩支腿及具有该伸缩支腿的工程机械
CN103466478A (zh) * 2013-09-18 2013-12-25 徐州重型机械有限公司 一种支腿伸缩控制***及起重机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51151922A (en) 1975-06-19 1976-12-27 Tadano Tekkosho:Kk Three step protact able and retractable beam system
DE4430180C2 (de) * 1994-08-25 1999-11-04 Reinhold Riedl Stütze für mit einem Zugfahrzeug gekuppelten Sattelauflieger
EP0886592B1 (de) * 1997-01-04 2002-10-16 RIEDL, Reinhold, Dipl.-Ing. Höhenverstellbare stütze für sattelauflieger

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