EP2313237B1 - Improvement to a device for inserting and extracting chain link pivot pins - Google Patents

Improvement to a device for inserting and extracting chain link pivot pins Download PDF

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Publication number
EP2313237B1
EP2313237B1 EP09800035.9A EP09800035A EP2313237B1 EP 2313237 B1 EP2313237 B1 EP 2313237B1 EP 09800035 A EP09800035 A EP 09800035A EP 2313237 B1 EP2313237 B1 EP 2313237B1
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EP
European Patent Office
Prior art keywords
branch
pivot pin
cylinder
bore
flanks
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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.)
Not-in-force
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EP09800035.9A
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German (de)
French (fr)
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EP2313237A1 (en
Inventor
Jean Sevrette
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/22—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning sprocket chains, endless tracks, antiskid chains
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/5377—Riveter

Definitions

  • the invention relates to a device for the implementation and on-site extraction of articulation axes of links of high size chains, including chains of cement conveyors.
  • the document FR-2902362 describes and represents such a device according to the preamble of claim 1, which allows for assembly or site maintenance of on-site chains whose links are of high size.
  • This device makes it possible to carry out on site maintenance operations of chain links of high size, and allows both to limit operator fatigue and the risk of accidents during the assembly or disassembly of the links.
  • this device can not be used systematically to the extent that the hydraulic cylinders it employs are mounted conventionally fixed relative to the portable supports cylinders.
  • the cylinders hydraulic supply lines are necessarily fixed, and may, depending on the configurations of use, encounter an obstacle arranged near the chain to be disassembled, which may prohibit the installation of the portable supports of jacks on the chain.
  • the invention overcomes this disadvantage by providing an improvement to the invention that is the subject of the application.
  • FR-2902362 allowing to guide the hydraulic supply lines of the cylinders.
  • Such chains 18 comprise, in known manner, an alternation of so-called external links 14 and links 16 called internal, each internal link 16 comprising at least two parallel flanks 20, 22 pierced at their ends 24, 26, joined together at said ends 24, 26 by a tubular spacer 28, and articulated at said ends 24, 26 of the parallel flanks 20, 22 of the inner links 16 on the drilled ends 30, 32 of the parallel flanks 34, 36 of two consecutive external links 14 via axes 12 associated hinge.
  • the branch 40 is fixed to the bucket (not shown) by means of screws (not shown) passing through holes 42 of the branch 40 of the angle.
  • the device 10 comprises at least one jack 44 which is intended to selectively urge a hinge axis 12 or a flank 32 of an external link 14 to respectively push a hinge axis 12 through at least an end piercing 31 and / or 33 of an external link 14, the aligned end bores 25, 27 of an internal link 16, and the associated spacer 28, for inserting said axis 12 or extracting said axis 12 .
  • the invention proposes in known manner a device 10 of the type described above that can be used in a portable manner to allow on-site interventions.
  • the device 10 thus makes it possible to simultaneously insert or extract the axes 12 associated with the two jacks 44.
  • this device can not be used systematically to the extent that the hydraulic cylinders 44 it employs are conventionally fixed relative to the portable cylinders supports.
  • each hydraulic jack 44 comprises a rod 50 which is moved by a piston hydraulic (not shown) movably mounted in a tubular body 52 which is fed by an associated lateral conduit 45.
  • the lateral hydraulic supply lines 45 of cylinders are necessarily fixed, and may, depending on the configurations of use, encounter an obstacle arranged near the chain to be disassembled, which may prohibit the placement of the supports. 46 portable cylinders on the chain.
  • the invention overcomes this drawback by proposing a device 10 whose design makes it possible to orient the hydraulic lines 45 for supplying the cylinders 44.
  • the body 52 is pivotally mounted axially relative to the associated jack support 46 to allow selective orientation of the pipe 45 as a function of the space available around each portable cylinder support 46.
  • each support 46 comprises a first branch 58 which is intended to be arranged at the end of a flank 32 of the external link 14 of the chain and which transversely receives a jack 44 for selectively biasing the flank 32 of the external link 14 or the hinge axis 12, and a second branch 60, parallel to the first branch 58 which is intended to form a stop element opposing the movement of the at least one of the flanks 24, 26, or 30, 32 of the inner or outer links 14, the spacer 28 or the hinge pin 12.
  • each cylinder 44 has an axis 53, which extends opposite the rod 50 from the body 52 of said cylinder 44, which passes through a bore 55 of a transverse wall 57 of the first branch 58
  • This shaft 53 is pivotally mounted relative to said bore 55 and is axially immobilized relative to the first branch 58.
  • the axis 53 is immobilized axially and pivotally mounted relative to the first leg 58 via a thrust bearing 61.
  • This stop is for example, and without limitation of the invention, an abutment 61 single effect.
  • the abutment 61 is received on the axis in contact with the transverse wall 57 of the first branch, and it is biased against said transverse wall 57 by means of a compression spring 63 which is threaded onto the axis 53.
  • the spring 63 is preferably centered on the axis 53 by means of frustoconical rings 65, 67 mounted at its ends, and it is held at a threaded end 71 of the axis 53 by at least one nut 73 braked and a washer 75 associated.
  • a braked nut 73 advantageously makes it possible to adjust the preload of the spring 63 and thus to determine the intensity of the manual torque that must be exerted on the body 53 of the jack 44 to cause it to rotate.
  • each support 46 has the shape of a stirrup having a transverse branch 62 connecting two parallel branches 58, 60 which are intended to be arranged on either side of the outer link 14.
  • the first leg 58 comprising the jack 44 whose rod 50 is capable of receiving at its end a bearing member 64 of a diameter corresponding to that of the hinge axis or a tubular support element 66 of an inner diameter greater than that of the hinge axis 12, and the second limb 60 has a bore 68 with a diameter greater than that of the hinge axis 12 which is capable of receiving a blind tubular socket 70 of which the blind hole 71 is of a diameter corresponding to that of the axis 12 of articulation.
  • This first configuration selectively makes it possible to extract the hinge axis 12, as shown in FIG. figure 3 .
  • the rod 50 of the cylinder 44 receives at its end the bearing element 64 of the diameter corresponding to that of the hinge axis 12 and the second leg 60 sees its bore 68 of the tubular sleeve deprived.
  • This first configuration also makes it possible to drive the hinge axis 12, as shown in FIG. figure 2 , or more exactly drive the two outer flanks 30, 32, the two inner flanks 24, 26 and the spacer 28 on the axis 12 of articulation, the rod 50 of the cylinder 44 receiving at its end the bearing element tubular 66 of the inner diameter greater than that of the axis 12 of articulation, which is then intended to bear on the outer flank 32 of the associated link 14, and the bore 68 of the second branch receiving the blind tubular sleeve 70 for immobilizing the hinge pin 12 and the flank 30 of the external link 14 which is opposite the jack 44.
  • the two parallel branches 58, 60 are integral with the connecting transverse branch 62.
  • the three branches can be made by assembling and welding steel elements, or by molding an alloy that can be molded by a foundry process, such as cast iron.
  • the transverse connecting branch 62 carries at least one transversely adjustable bracket 72, of which a first branch 74 is fixed to the transverse connecting branch 62 and of which a second projecting limb 76 has a stop button 78 which is turned towards the side inside 80 of the sidewall 30 of the external link 14 opposite the cylinder 44.
  • This key 78 is intended to allow the pinch of said sidewall 30 between the branch 76 of the bracket and the second leg 60 of the support.
  • each support 46 comprises two parallel flanges 58, 60 joined in a spacing adjustable by at least one pair of tie rods 94.
  • a first flange 58 comprises the jack 44 whose rod 50 is capable of receiving at its end a bearing element 64 of a diameter corresponding to that of the axis 12 of articulation or a bearing element 66 of tubular d an internal diameter greater than that of the axis 12 of articulation.
  • a second flange 60 comprises on the one hand a bore 96 of a diameter corresponding to that of the spacer and is on the other hand consists of two half-flanges 98, 100 removable joined by a plane 102 passing through a diameter of said bore 96.
  • This bore 96 is capable of selectively receiving a blind tubular socket 104 whose blind hole is of a diameter corresponding to that of the axis 12 of articulation.
  • the two half-flanges 98, 100 may be assembled to one another by screws 103 or by any other assembly means known from the state of the art.
  • the device 10 allows, as illustrated by figure 6 to extract the axis 12 of articulation.
  • the rod 50 of the cylinder 44 of the first flange 58 receives at its end the bearing element 64 of the diameter corresponding to that of the axis 12 of articulation and the second flange 60 occupies a transverse position on the tie rods 94 such as the second flange 60 is assembled around the spacer 28 received in the bushing bore 96 of said second flange 60.
  • the axis 12 can then be driven through the second flange 60 and the spacer 28.
  • the device 10 according to this second embodiment also allows, as illustrated by FIG. figure 7 , pushing the two outer flanks 30, 32, the two inner flanks 24, 26 and the spacer 28 on the axis 12 of articulation, the rod 50 of the cylinder 44 receiving at its end the bearing element 66 tubular inner diameter greater than that of the hinge pin 12 intended to bear on the outer flank 32 of the associated link, and the second flange 60 occupying a retracted transverse position on the tie rods 94 such that the flanges 58, 60 are arranged on either side of the flanks 30, 32 of the external link 14.
  • the bore 96 of the second flange 60 then receives the blind tubular socket 104 which is intended to immobilize the hinge axis 12 and the flank 30 of the link external 14 opposite the cylinder 44.
  • the bodies 52 of the cylinders 44 are supplied with hydraulic fluid by the lateral pipes 45 themselves fed by a single hydraulic supply element 54.
  • the hydraulic power element 54 may in particular consist of a manual pump actuated by the operator of the device 10. However, for reasons of ease of use, and in order to minimize operator fatigue the hydraulic supply element 54 is preferably constituted by a power supply hydraulic power unit.
  • the control device 48 common to both cylinders comprises the single hydraulic supply element 54 and a hydraulic distributor 56 which is intended to distribute the hydraulic fluid from the single hydraulic supply element 54 between the pipes 45 of the two cylinders 44 to cause the simultaneous movement of said cylinders 44. It is indeed essential to the proper functioning of the device 10 that the advance of the rods of the cylinders 44 is simultaneous to cause a satisfactory depression of the flanks 32 of the external link 14 on the axes 12 or to cause a satisfactory extraction of the axes 12.
  • the hydraulic distributor 56 can be produced in a simple and economical manner by means of two independent manual valves which make it possible to regulate the beginning of hydraulic fluid supplying each cylinder 44 to manually synchronize the movements of the two cylinders 44.
  • the hydraulic distributor 56 is a vending machine for automatically synchronizing the movement of the rods 50 of the two cylinders 44 in a synchronized manner.
  • the invention therefore advantageously makes it possible to assemble or separate internal links 14 and external 16 of a high-size chain, without risk and without fatigue for the operator in charge of this manipulation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Earth Drilling (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

L'invention concerne un dispositif pour la mise en place et l'extraction sur site d'axes d'articulation de maillons de chaînes de taille élevée, notamment de chaînes de convoyeurs de cimenterie.The invention relates to a device for the implementation and on-site extraction of articulation axes of links of high size chains, including chains of cement conveyors.

L'invention concerne plus particulièrement un dispositif pour la mise en place et l'extraction sur site d'axes d'articulation de maillons de chaînes de taille élevée, notamment de chaînes de convoyeurs de cimenterie, qui comportent une alternance de maillons dits externes et de maillons dits internes, chaque maillon interne comportant au moins deux flancs parallèles percés à leurs extrémités, réunis ensembles auxdites extrémités par une entretoise tubulaire, et articulés auxdites extrémités des flancs parallèles des maillons internes sur les extrémités percées des flancs parallèles de deux maillons externes consécutifs par l'intermédiaire d'axes d'articulation associés, ledit dispositif comportant au moins un vérin qui comporte :

  • au moins une paire de supports portables de vérin, susceptibles d'être mis en place sur site par un opérateur aux extrémités opposées d'un maillon externe,
  • deux vérins hydrauliques synchronisés en déplacement, dont chacun est reçu dans un des supports et est destiné à sélectivement solliciter un axe d'articulation associé ou bien les extrémités d'un flanc d'un maillon externe associé sur lesquels le support associé est mis en place pour pousser l'axe d'articulation associé au travers d'au moins un perçage d'extrémité du maillon externe associé, les perçages d'extrémité alignés du maillon interne associé, et l'entretoise associée, pour insérer ou extraire simultanément les axes associés aux deux vérins.
The invention more particularly relates to a device for the establishment and on-site extraction of articulation axes of links of high size chains, especially chains of cement conveyors, which comprise an alternation of so-called external links and so-called internal links, each internal link having at least two parallel flanks pierced at their ends, joined together at said ends by a tubular spacer, and articulated at said ends of the parallel flanks of the internal links on the pierced ends of the parallel flanks of two consecutive outer links via associated hinge pins, said device comprising at least one jack which comprises:
  • at least one pair of portable jack supports, which can be set up on site by an operator at opposite ends of an external link,
  • two hydraulic cylinders synchronized in displacement, each of which is received in one of the supports and is intended to selectively request an associated hinge axis or the ends of a sidewall of an associated external link on which the associated support is put in place to push the associated hinge axis through at least one end hole of the associated external link, the aligned end holes of the associated internal link, and the associated spacer, to simultaneously insert or extract the associated axes to both cylinders.

Le document FR-2.902.362 décrit et représente un tel dispositif selon le préambule de la revendiction 1, qui permet pour l'assemblage ou la maintenance sur site de chaînes sur site dont les maillons sont de taille élevée.The document FR-2902362 describes and represents such a device according to the preamble of claim 1, which allows for assembly or site maintenance of on-site chains whose links are of high size.

En effet, de telles chaînes sont couramment utilisées dans l'industrie lourde, notamment pour assurer la transmission de mouvement au sein de convoyeurs de grande taille. La taille et le poids des maillons de ce type de chaîne, typiquement de l'ordre d'une trentaine de kilogrammes par maillon, limite leur déplacement.Indeed, such chains are commonly used in heavy industry, especially to ensure the transmission of movement within large conveyors. The size and weight of the links of this type of chain, typically of the order of thirty kilograms per link, limits their movement.

Ce dispositif permet de réaliser sur site des opérations maintenance de maillons de chaîne de taille élevée, et permet tant de limiter la fatigue des opérateurs que les risques d'accidents lors des opérations de montage ou démontage des maillons.This device makes it possible to carry out on site maintenance operations of chain links of high size, and allows both to limit operator fatigue and the risk of accidents during the assembly or disassembly of the links.

Toutefois, ce dispositif ne peut être utilisé systématiquement dans la mesure où les vérins hydrauliques qu'il emploie sont montés conventionnellement fixes par rapport aux supports portables de vérins.However, this device can not be used systematically to the extent that the hydraulic cylinders it employs are mounted conventionally fixed relative to the portable supports cylinders.

Dans cette configuration, les conduites d'alimentation hydrauliques de vérins sont nécessairement fixes, et peuvent, selon les configurations d'utilisation, rencontrer un obstacle agencé à proximité de la chaîne à démonter, ce qui peut interdire la mise en place des supports portables de vérins sur la chaîne.In this configuration, the cylinders hydraulic supply lines are necessarily fixed, and may, depending on the configurations of use, encounter an obstacle arranged near the chain to be disassembled, which may prohibit the installation of the portable supports of jacks on the chain.

L'invention remédie à cet inconvénient en apportant un perfectionnement à l'invention objet de la demande FR-2.902.362 , en permettant d'orienter les conduites hydrauliques d'alimentation des vérins.The invention overcomes this disadvantage by providing an improvement to the invention that is the subject of the application. FR-2902362 , allowing to guide the hydraulic supply lines of the cylinders.

Dans ce but, l'invention propose un dispositif selon la revendication 1.

  • chaque support comporte une première branche qui est destinée à être agencée à l'extrémité d'un flanc du maillon externe de la chaîne et qui reçoit transversalement un vérin pour sélectivement solliciter le flanc du maillon externe ou bien l'axe d'articulation, et une seconde branche, parallèle à la première branche qui est destinée à former un élément de butée s'opposant au mouvement d'au moins un élément parmi les flancs des maillons interne ou externe, l'entretoise ou l'axe d'articulation, pour :
    • enfoncer les deux flancs externes, les deux flancs internes et l'entretoise sur l'axe d'articulation lorsque le vérin sollicite le flanc d'un maillon externe et que la seconde branche s'oppose au mouvement de l'axe d'articulation,
      ou bien
    • extraire l'axe d'articulation lorsque le vérin sollicite l'axe d'articulation et que la seconde branche s'oppose au mouvement d'au moins un élément parmi les flancs des maillons interne ou externe et l'entretoise en permettant le passage de l'axe à travers les éléments à l'encontre du mouvement desquels elle ne s'oppose pas,
  • le corps de chaque vérin comporte un axe, qui s'étend à l'opposé de la tige à partir du corps dudit vérin, qui traverse un perçage d'une paroi transversale de la première branche, qui est monté pivotant par rapport audit perçage, et qui est immobilisé axialement par rapport à la première branche,
  • l'axe est immobilisé axialement et monté pivotant par rapport à la première branche par l'intermédiaire d'une butée à billes, notamment à simple effet, qui est reçue sur l'axe au contact de la paroi transversale de la première branche, et qui est sollicitée contre ladite paroi transversale par l'intermédiaire d'un ressort de compression qui est enfilé sur l'axe, et notamment centré sur ledit axe par l'intermédiaire de bagues tronconiques, et qui est maintenu à une extrémité filetée de l'axe par au moins un écrou freiné,
  • chaque support présente la forme d'un étrier comportant une branche transversale de jonction réunissant deux branches parallèles qui sont destinées à être agencées de part et d'autre du maillon externe, dont la première branche comportant le vérin dont la tige est susceptible de recevoir à son extrémité un élément d'appui d'un diamètre correspondant à celui de l'axe d'articulation ou bien un élément d'appui tubulaire d'un diamètre interne supérieur à celui de l'axe d'articulation, et dont la seconde branche comporte un alésage d'un diamètre supérieur à celui de l'axe d'articulation qui est susceptible de recevoir une douille tubulaire borgne dont le perçage borgne est d'un diamètre correspondant à celui de l'axe d'articulation, pour sélectivement :
    • extraire l'axe d'articulation, la tige du vérin (44) recevant à son extrémité l'élément d'appui du diamètre correspondant à celui de l'axe d'articulation et la seconde branche voyant son alésage privé de la douille tubulaire,
      ou bien
    • enfoncer les deux flancs externes, les deux flancs internes et l'entretoise sur l'axe d'articulation, la tige du vérin recevant à son extrémité l'élément d'appui tubulaire du diamètre interne supérieur à celui de l'axe d'articulation destiné à prendre appui sur le flanc externe du maillon associé, et l'alésage de la seconde branche recevant la douille tubulaire borgne destinée à immobiliser l'axe d'articulation et le flanc du maillon externe opposé au vérin,
  • les deux branches parallèles sont venues de matière avec la branche transversale de jonction,
  • la branche transversale de jonction porte au moins une équerre réglable transversalement dont une première branche est fixée à la branche transversale de jonction et dont une seconde branche en saillie comporte une touche de butée qui est tournée vers le côté intérieur du flanc du maillon externe opposé au vérin, qui est destinée à permettre le pincement dudit flanc entre la branche de l'équerre et la seconde branche du support,
  • l'équerre réglable comporte :
    • au moins deux vis qui traversent la première branche transversale et qui sont susceptibles d'être reçues dans deux taraudages d'une série de taraudages (84) pratiqués dans la branche transversale du support selon un espacement correspondant à celui des vis de la branche de l'équerre, pour proposer plusieurs positions de l'équerre par rapport à la branche transversale,
    • au moins une vis transversale de butée, qui traverse un taraudage formé dans seconde la branche en saillie de l'équerre et dont l'extrémité comporte la touche de butée, pour permettre un réglage précis de la position de la touche de butée,
  • chaque support comporte deux flasques parallèles formant les première et seconde branches, réunis selon un écartement réglable par au moins une paire de tirants,
    un premier flasque comportant le vérin dont la tige est susceptible de recevoir à son extrémité un élément d'appui d'un diamètre correspondant à celui de l'axe d'articulation ou bien un élément d'appui tubulaire d'un diamètre interne supérieur à celui de l'axe d'articulation,
    et un second flasque, comportant d'une part un alésage d'un diamètre correspondant à celui de l'entretoise et étant d'autre part constitué de deux demi-flasques démontables jointifs par un plan passant par un diamètre dudit alésage, ledit alésage étant susceptible de recevoir sélectivement une douille tubulaire borgne dont le perçage borgne est d'un diamètre correspondant à celui de l'axe d'articulation, pour sélectivement :
    • extraire l'axe d'articulation, la tige du vérin du premier, flasque recevant à son extrémité l'élément d'appui du diamètre correspondant à celui de l'axe d'articulation et le second flasque occupant une position transversale sur les tirants telle que le second flasque soit assemblé autour de l'entretoise reçue dans l'alésage privé de douille dudit second flasque,
      ou bien
    • enfoncer les deux flancs externes, les deux flancs internes et l'entretoise sur l'axe d'articulation, la tige du vérin recevant à son extrémité l'élément (66) d'appui tubulaire du diamètre interne supérieur à celui de l'axe d'articulation destiné à prendre appui sur le flanc externe du maillon associé, et le second flasque occupant une position transversale sur les tirants telle que les flasques soient agencés de part et d'autre des flancs du maillon externe, l'alésage du second flasque recevant la douille tubulaire borgne destinée à immobiliser l'axe d'articulation et le flanc du maillon externe opposé au vérin,
  • les conduites sont alimentées en fluide hydraulique par un unique élément hydraulique d'alimentation,
  • le dispositif de commande commun aux deux vérins comporte l'unique élément hydraulique d'alimentation et un distributeur hydraulique qui est destiné à répartir le fluide hydraulique issu de l'unique élément hydraulique d'alimentation entre les conduites des deux vérins pour provoquer le déplacement simultané des deux vérins,
  • le distributeur hydraulique comporte deux vannes indépendantes manuelles permettant de réguler le début de fluide hydraulique alimentant chaque vérin pour synchroniser manuellement les déplacements des deux vérins,
  • le distributeur hydraulique est un distributeur automatique permettant de synchroniser automatiquement le déplacement des deux vérins de manière synchronisée.
  • l'élément hydraulique d'alimentation est constitué d'une centrale hydraulique à alimentation électrique.
For this purpose, the invention proposes a device according to claim 1.
  • each support comprises a first branch which is intended to be arranged at the end of a side of the external link of the chain and which transversely receives a jack for selectively urging the sidewall of the external link or the axis of articulation, and a second branch, parallel to the first branch which is intended to form an abutment element opposing the movement of at least one of the flanks of the inner or outer links, the spacer or the hinge pin, for :
    • depressing the two outer flanks, the two inner flanks and the spacer on the hinge axis when the jack is urging the flank of an external link and the second limb opposes the movement of the hinge pin,
      or
    • extracting the hinge axis when the jack is biasing the hinge pin and the second leg is opposed to the movement of at least one of the flanks of the inner or outer links and the spacer allowing the passage of the axis through the elements against the movement of which it does not oppose,
  • the body of each cylinder comprises an axis, which extends opposite the rod from the body of said cylinder, which passes through a bore of a transverse wall of the first branch, which is pivotally mounted relative to said bore, and which is immobilized axially with respect to the first limb,
  • the axis is immobilized axially and pivotally mounted relative to the first branch by means of a thrust ball bearing, in particular a single-acting one, which is received on the axis in contact with the transverse wall of the first branch, and which is urged against said transverse wall by means of a compression spring which is threaded on the axis, and in particular centered on said axis by means of frustoconical rings, and which is held at a threaded end of the axis by at least one braked nut,
  • each support has the shape of a stirrup having a transverse junction branch joining two parallel branches which are intended to be arranged on either side of the external link, the first branch of which comprises the jack whose stem is capable of receiving at its end a bearing element of a diameter corresponding to that of the axis of articulation or a tubular bearing element with an internal diameter greater than that of the axis of articulation, and whose second limb has a bore with a diameter greater than that of the hinge pin which is capable of receiving a blind tubular socket whose blind hole is of a diameter corresponding to that of the hinge pin, for selectively:
    • extracting the hinge axis, the cylinder rod (44) receiving at its end the bearing element of the diameter corresponding to that of the hinge axis and the second branch showing its private bore of the tubular sleeve,
      or
    • depressing the two outer flanks, the two inner flanks and the spacer on the hinge axis, the cylinder rod receiving at its end the tubular bearing element of the internal diameter greater than that of the hinge axis intended to bear on the outer side of the associated link, and the bore of the second branch receiving the blind tubular bush intended to immobilize the hinge pin and the side of the external link opposite the jack,
  • the two parallel branches are made of material with the transverse branch of junction,
  • the transverse junction branch carries at least one transversely adjustable bracket whose first branch is fixed to the transverse junction branch and of which a second projecting branch comprises an abutment key which is turned towards the inside of the side of the external link opposite the cylinder, which is intended to allow the pinch of said flank between the arm of the bracket and the second branch of the support,
  • the adjustable bracket features:
    • at least two screws which pass through the first transverse branch and which are capable of being received in two threads of a series of threads (84) made in the transverse branch of the support in a spacing corresponding to that of the screws of the branch of the square, to propose several positions of the square relative to the transverse branch,
    • at least one transverse stop screw, which passes through a thread formed in the second branch projecting from the bracket and whose end comprises the stop button, to allow precise adjustment of the position of the stop button,
  • each support comprises two parallel flanges forming the first and second branches, joined in a spacing adjustable by at least one pair of tie rods,
    a first flange comprising the cylinder whose rod is capable of receiving at its end a bearing element of a diameter corresponding to that of the axis of articulation or a tubular bearing element with an internal diameter greater than that of the axis of articulation,
    and a second flange, comprising on the one hand a bore of a diameter corresponding to that of the spacer and on the other hand consisting of two demountable half-flanges joined by a plane passing through a diameter of said bore, said bore being capable of selectively receiving a blind tubular socket whose blind hole is of a diameter corresponding to that of the axis of articulation, for selectively:
    • extracting the axis of articulation, the rod of the cylinder of the first flange receiving at its end the bearing element of the diameter corresponding to that of the axis of articulation and the second flange occupying a transverse position on the tie rods as that the second flange is assembled around the spacer received in the bushing bore of said second flange,
      or
    • depressing the two outer flanks, the two inner flanks and the spacer on the hinge axis, the cylinder rod receiving at its end the tubular support element (66) of the internal diameter greater than that of the axis articulation to be supported on the outer flank of the associated link, and the second flange occupying a transverse position on the tie rods such that the flanges are arranged on either side of the flanks of the outer link, the bore of the second flange receiving the tubular blind socket intended to immobilize the hinge pin and the sidewall of the external link opposite the jack,
  • the pipes are supplied with hydraulic fluid by a single hydraulic feed element,
  • the control device common to both cylinders comprises the single hydraulic supply element and a hydraulic distributor which is intended to distribute the hydraulic fluid from the single hydraulic supply element between the pipes of the two cylinders to cause simultaneous movement two cylinders,
  • the hydraulic distributor comprises two independent manual valves for regulating the start of hydraulic fluid supplying each cylinder to manually synchronize the movements of the two cylinders,
  • the hydraulic distributor is a vending machine for automatically synchronizing the movement of the two cylinders in a synchronized manner.
  • the hydraulic supply element consists of a hydraulic power supply unit.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en perspective d'un dispositif selon l'invention,
  • la figure 2 est une vue en perspective d'un support de vérin selon un premier mode de réalisation de l'invention,
  • la figure 3 est une vue en coupe du support de vérin de la figure 2 représenté au cours d'une opération d'extraction d'un axe de maillon de chaîne,
  • la figure 4 est une vue en coupe du support de vérin de la figure 2 représenté au cours d'une opération d'insertion d'un axe de maillon de chaîne,
  • la figure 5 est une vue en perspective d'un support de vérin selon un second mode de réalisation de l'invention
  • la figure 6 est une vue en coupe du support de vérin de la figure 5 représenté au cours d'une opération d'extraction d'un axe de maillon de chaîne,
  • la figure 7 est une vue en coupe du support de vérin de la figure 5 représenté au cours d'une opération d'insertion d'un axe de maillon de chaîne,
  • la figure 8 est une vue en coupe de détail illustrant le montage d'un vérin dans le support de vérin de la figure 2.
Other features and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • the figure 1 is a schematic perspective view of a device according to the invention,
  • the figure 2 is a perspective view of a jack support according to a first embodiment of the invention,
  • the figure 3 is a sectional view of the cylinder support of the figure 2 represented during an extraction operation of a chain link axis,
  • the figure 4 is a sectional view of the cylinder support of the figure 2 represented during an insertion operation of a chain link axis,
  • the figure 5 is a perspective view of a jack support according to a second embodiment of the invention
  • the figure 6 is a sectional view of the cylinder support of the figure 5 represented during an extraction operation of a chain link axis,
  • the figure 7 is a sectional view of the cylinder support of the figure 5 represented during an insertion operation of a chain link axis,
  • the figure 8 is a detail sectional view illustrating the mounting of a jack in the cylinder support of the figure 2 .

Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires.In the following description, like reference numerals designate like parts or having similar functions.

On a représenté sur les figures 1, 2, et 5 un dispositif 10 pour la mise en place et l'extraction sur site d'axes 12 d'articulation de maillons 14, 16 de chaînes 18 de taille élevée, notamment de chaînes de convoyeurs de cimenterie.We have shown on figures 1 , 2 , and 5 a device 10 for the establishment and on-site extraction of articulation axes 12 of links 14, 16 of chains 18 of high size, including chains of cement conveyors.

De telles chaînes 18 comportent de manière connue une alternance de maillons 14 dits externes et de maillons 16 dits internes, chaque maillon interne 16 comportant au moins deux flancs parallèles 20, 22 percés à leurs extrémités 24, 26 , réunis ensembles auxdites extrémités 24, 26 par une entretoise tubulaire 28, et articulés auxdites extrémités 24, 26 des flancs parallèles 20, 22 des maillons internes 16 sur les extrémités percées 30, 32 des flancs parallèles 34, 36 de deux maillons externes 14 consécutifs par l'intermédiaire d'axes 12 d'articulation associés.Such chains 18 comprise, in known manner, an alternation of so-called external links 14 and links 16 called internal, each internal link 16 comprising at least two parallel flanks 20, 22 pierced at their ends 24, 26, joined together at said ends 24, 26 by a tubular spacer 28, and articulated at said ends 24, 26 of the parallel flanks 20, 22 of the inner links 16 on the drilled ends 30, 32 of the parallel flanks 34, 36 of two consecutive external links 14 via axes 12 associated hinge.

En particulier, comme l'illustrent les figures 3, 4, 6, et 7, les extrémités 24, 26 des flancs parallèles 20, 22 des maillons internes 16 sont traversées par des perçages 25, 27 associés, et les extrémités 30, 32 des flancs parallèles 34, 36 des maillons externes 14 sont traversées par des perçages 31, 33 associés.In particular, as illustrated by the Figures 3, 4 , 6, and 7 , the ends 24, 26 of the parallel flanks 20, 22 of the internal links 16 are traversed by bores 25, 27 associated, and the ends 30, 32 of the parallel flanks 34, 36 of the outer links 14 are traversed by bores 31, 33 associates.

A titre d'exemple, dans le cas de convoyeurs de cimenterie, deux chaînes parallèles portent une série de bennes (non représentée) régulièrement espacées, et chaque benne est donc fixée à ses extrémités opposées sur une chaîne du type de la chaîne 18. A cet effet, comme l'illustre la figure 2, en fonction de l'espacement des bennes au long de ses chaînes 18 parallèles associées, un des deux flancs 34 de certains maillons externes 16 constitue une branche d'une cornière 38 dont l'autre branche 40 permet la fixation d'une extrémité de la benne (non représentée).For example, in the case of cement conveyors, two parallel chains carry a series of skips (not shown) regularly spaced, and each bucket is fixed at its opposite ends on a chain of the chain type 18. A this effect, as illustrated by figure 2 , depending on the spacing of the skips along its associated parallel chains 18, one of the two flanks 34 of certain external links 16 constitutes a branch of a bracket 38, the other branch 40 of which allows the attachment of an end of the bucket (not shown).

La branche 40 est fixée à la benne (non représentée) par l'intermédiaire de vis (non représentées) traversant des perçages 42 de la branche 40 de la cornière.The branch 40 is fixed to the bucket (not shown) by means of screws (not shown) passing through holes 42 of the branch 40 of the angle.

De manière connue, le dispositif 10 comporte au moins un vérin 44 qui est destiné à sélectivement solliciter un axe d'articulation 12 ou un flanc 32 d'un maillon externe 14 pour respectivement pousser un axe 12 d'articulation au travers d'au moins un perçage d'extrémité 31 et/ou 33 d'un maillon externe 14, les perçages d'extrémité alignés 25, 27 d'un maillon interne 16, et l'entretoise 28 associée, pour insérer ledit axe 12 ou extraire ledit axe 12.In known manner, the device 10 comprises at least one jack 44 which is intended to selectively urge a hinge axis 12 or a flank 32 of an external link 14 to respectively push a hinge axis 12 through at least an end piercing 31 and / or 33 of an external link 14, the aligned end bores 25, 27 of an internal link 16, and the associated spacer 28, for inserting said axis 12 or extracting said axis 12 .

Plus particulièrement, l'invention propose de manière connue un dispositif 10 du type décrit précédemment pouvant être utilisé de manière portable afin de permettre des interventions sur site.More particularly, the invention proposes in known manner a device 10 of the type described above that can be used in a portable manner to allow on-site interventions.

Le dispositif 10 comporte ainsi :

  • au moins une paire de supports 46 portables de vérin, susceptibles d'être mis en place sur site par un opérateur aux extrémités opposées d'un maillon 14 externe,
  • deux vérins 44 hydrauliques synchronisés en déplacement, dont chacun est destiné à être reçu dans un des supports 46, et qui sont destinés à solliciter simultanément les axes 12 d'articulation ou bien les extrémités du flanc 32 du maillon 14 externe sur lesquels le support 46 est mis en place, pour pousser l'axe 12 d'articulation associé au travers d'au moins un perçage d'extrémité 31, 33 du maillon externe 14 associé, les perçages d'extrémité alignés 25, 27 du maillon interne 16 associé, et l'entretoise 28 associée,
The device 10 thus comprises:
  • at least one pair of portable jack supports 46, which can be placed on site by an operator at the opposite ends of an external link 14,
  • two hydraulic cylinders 44 synchronized in displacement, each of which is intended to be received in one of the supports 46, and which are intended to simultaneously urge the hinge pins 12 or the ends of the flank 32 of the external link 14 on which the support 46 is put in place, to push the associated articulation axis 12 through at least one end piercing 31, 33 of the associated external link 14, the aligned end holes 25, 27 of the associated internal link 16, and the spacer 28 associated,

Le dispositif 10 permet ainsi d'insérer ou d'extraire simultanément les axes 12 associés aux deux vérins 44.The device 10 thus makes it possible to simultaneously insert or extract the axes 12 associated with the two jacks 44.

Toutefois, dans sa plus simple définition, ce dispositif ne peut être utilisé systématiquement dans la mesure où les vérins hydrauliques 44 qu'il emploie sont conventionnellement fixes par rapport aux supports portables de vérins.However, in its simplest definition, this device can not be used systematically to the extent that the hydraulic cylinders 44 it employs are conventionally fixed relative to the portable cylinders supports.

En effet, comme l'illustrent les figures 1 à 4, chaque vérin 44 hydraulique comporte une tige 50 qui est mue par un piston hydraulique (non représenté) monté mobile dans un corps 52 tubulaire qui est alimenté par une conduite 45 latérale associée.Indeed, as illustrated by Figures 1 to 4 each hydraulic jack 44 comprises a rod 50 which is moved by a piston hydraulic (not shown) movably mounted in a tubular body 52 which is fed by an associated lateral conduit 45.

Dans cette configuration, les conduites latérales 45 d'alimentation hydrauliques de vérins sont nécessairement fixes, et peuvent, selon les configurations d'utilisation, rencontrer un obstacle agencé à proximité de la chaîne à démonter, ce qui peut interdire la mise en place des supports 46 portables de vérins sur la chaîne.In this configuration, the lateral hydraulic supply lines 45 of cylinders are necessarily fixed, and may, depending on the configurations of use, encounter an obstacle arranged near the chain to be disassembled, which may prohibit the placement of the supports. 46 portable cylinders on the chain.

L'invention remédie à cet inconvénient en proposant un dispositif 10 dont la conception permet d'orienter les conduites hydrauliques 45 d'alimentation des vérins 44.The invention overcomes this drawback by proposing a device 10 whose design makes it possible to orient the hydraulic lines 45 for supplying the cylinders 44.

A cet effet, conformément à l'invention, et comme l'illustre plus particulièrement la figure 8, le corps 52 est monté pivotant axialement par rapport au support de 46 vérin associé pour permettre une orientation sélective de la conduite 45 en fonction de l'espace disponible autour de chaque support 46 portable de vérin.For this purpose, in accordance with the invention, and as is more particularly illustrated by figure 8 , the body 52 is pivotally mounted axially relative to the associated jack support 46 to allow selective orientation of the pipe 45 as a function of the space available around each portable cylinder support 46.

Deux modes de réalisation de l'invention vont à présent être décrits dans la suite de la présente description.Two embodiments of the invention will now be described in the following description.

Dans chacun de ces deux modes, et d'une manière générale, chaque support 46 comporte une première branche 58 qui est destinée à être agencée à l'extrémité d'un flanc 32 du maillon externe 14 de la chaîne et qui reçoit transversalement un vérin 44 pour sélectivement solliciter le flanc 32 du maillon externe 14 ou bien l'axe 12 d'articulation, et une seconde branche 60, parallèle à la première branche 58 qui est destinée à former un élément de butée s'opposant au mouvement d'au moins un élément parmi les flancs 24,26, ou 30, 32 des maillons interne 16 ou externe 14, l'entretoise 28 ou l'axe 12 d'articulation.In each of these two modes, and in a general manner, each support 46 comprises a first branch 58 which is intended to be arranged at the end of a flank 32 of the external link 14 of the chain and which transversely receives a jack 44 for selectively biasing the flank 32 of the external link 14 or the hinge axis 12, and a second branch 60, parallel to the first branch 58 which is intended to form a stop element opposing the movement of the at least one of the flanks 24, 26, or 30, 32 of the inner or outer links 14, the spacer 28 or the hinge pin 12.

Cette configuration permet au choix :

  • soit d'enfoncer les deux flancs externes 30, 32, les deux flancs internes 24, 26 et l'entretoise 28 sur l'axe 12 d'articulation lorsque le vérin 44 sollicite le flanc 32 d'un maillon externe 14 et que la seconde branche 60 s'oppose au mouvement de l'axe 12 d'articulation,
  • soit, au contraire, d'extraire l'axe 12 d'articulation lorsque le vérin 44 sollicite l'axe 12 d'articulation et que la seconde branche 60 s'oppose au mouvement d'au moins un élément parmi les flancs des maillons interne 16 ou externe 14 et l'entretoise 28, tout en permettant le passage de l'axe 12 à travers les éléments à l'encontre du mouvement desquels elle ne s'oppose pas.
This configuration allows the choice:
  • either of driving the two outer flanks 30, 32, the two inner flanks 24, 26 and the spacer 28 on the hinge axis 12 when the jack 44 biases the flank 32 of an external link 14 and that the second limb 60 opposes the movement of the axis 12 of articulation,
  • or, on the contrary, to extract the hinge axis 12 when the jack 44 biases the hinge axis 12 and the second limb 60 opposes the movement of at least one of the flanks of the internal links 16 or external 14 and the spacer 28, while allowing the passage of the axis 12 through the elements against the movement of which it does not oppose.

Partant de ce principe général de fonctionnement, comme l'illustre la figure 8, le corps 52 de chaque vérin 44 comporte un axe 53, qui s'étend à l'opposé de la tige 50 à partir du corps 52 dudit vérin 44, qui traverse un perçage 55 d'une paroi transversale 57 de la première branche 58. Cet axe 53 est monté pivotant par rapport audit perçage 55, et il est immobilisé axialement par rapport à la première branche 58.Starting from this general principle of operation, as illustrated by figure 8 , the body 52 of each cylinder 44 has an axis 53, which extends opposite the rod 50 from the body 52 of said cylinder 44, which passes through a bore 55 of a transverse wall 57 of the first branch 58 This shaft 53 is pivotally mounted relative to said bore 55 and is axially immobilized relative to the first branch 58.

Plus particulièrement, l'axe 53 est immobilisé axialement et monté pivotant par rapport à la première branche 58 par l'intermédiaire d'une butée à billes 61. Cette butée est par exemple, et de manière non limitative de l'invention, une butée 61 à simple effet.More particularly, the axis 53 is immobilized axially and pivotally mounted relative to the first leg 58 via a thrust bearing 61. This stop is for example, and without limitation of the invention, an abutment 61 single effect.

La butée 61 est reçue sur l'axe au contact de la paroi 57 transversale de la première branche, et elle est sollicitée contre ladite paroi transversale 57 par l'intermédiaire d'un ressort 63 de compression qui est enfilé sur l'axe 53.The abutment 61 is received on the axis in contact with the transverse wall 57 of the first branch, and it is biased against said transverse wall 57 by means of a compression spring 63 which is threaded onto the axis 53.

Le ressort 63 est de préférence centré sur l'axe 53 par l'intermédiaire de bagues tronconiques 65, 67 montées à ses extrémités, et il est maintenu à une extrémité filetée 71 de l'axe 53 par au moins un écrou 73 freiné et une rondelle 75 associée.The spring 63 is preferably centered on the axis 53 by means of frustoconical rings 65, 67 mounted at its ends, and it is held at a threaded end 71 of the axis 53 by at least one nut 73 braked and a washer 75 associated.

L'utilisation d'un écrou 73 freiné permet avantageusement de régler la précharge du ressort 63 et donc de déterminer l'intensité du couple manuel qui doit être exercé sur le corps 53 du vérin 44 pour en provoquer la rotation.The use of a braked nut 73 advantageously makes it possible to adjust the preload of the spring 63 and thus to determine the intensity of the manual torque that must be exerted on the body 53 of the jack 44 to cause it to rotate.

Cette configuration, qui a été représentée à la figure 8 pour un support 46 similaire à celui des figures 1 à 4, trouve néanmoins à s'appliquer aux deux modes de réalisation de l'invention qui sont décrits dans la suite de la présente description.This configuration, which was represented at figure 8 for a support 46 similar to that of Figures 1 to 4 , nevertheless finds application to the two embodiments of the invention which are described in the remainder of this description.

Selon un premier mode de réalisation qui a été représenté aux figures 1 à 3, chaque support 46 présente la forme d'un étrier comportant une branche transversale 62 de jonction réunissant deux branches parallèles 58, 60 qui sont destinées à être agencées de part et d'autre du maillon externe 14.According to a first embodiment which has been represented in Figures 1 to 3 each support 46 has the shape of a stirrup having a transverse branch 62 connecting two parallel branches 58, 60 which are intended to be arranged on either side of the outer link 14.

La première branche 58 comportant le vérin 44 dont la tige 50 est susceptible de recevoir à son extrémité un élément d'appui 64 d'un diamètre correspondant à celui de l'axe d'articulation ou bien un élément d'appui 66 tubulaire d'un diamètre interne supérieur à celui de l'axe 12 d'articulation, et la seconde branche 60 comporte un alésage 68 d'un diamètre supérieur à celui de l'axe 12 d'articulation qui est susceptible de recevoir une douille 70 tubulaire borgne dont le perçage borgne 71 est d'un diamètre correspondant à celui de l'axe 12 d'articulation.The first leg 58 comprising the jack 44 whose rod 50 is capable of receiving at its end a bearing member 64 of a diameter corresponding to that of the hinge axis or a tubular support element 66 of an inner diameter greater than that of the hinge axis 12, and the second limb 60 has a bore 68 with a diameter greater than that of the hinge axis 12 which is capable of receiving a blind tubular socket 70 of which the blind hole 71 is of a diameter corresponding to that of the axis 12 of articulation.

Cette première configuration permet sélectivement d'extraire l'axe 12 d'articulation, comme représenté à la figure 3.This first configuration selectively makes it possible to extract the hinge axis 12, as shown in FIG. figure 3 .

A cet effet, la tige 50 du vérin 44 reçoit à son extrémité l'élément d'appui 64 du diamètre correspondant à celui de l'axe 12 d'articulation et la seconde branche 60 voit son alésage 68 privé de la douille tubulaire.For this purpose, the rod 50 of the cylinder 44 receives at its end the bearing element 64 of the diameter corresponding to that of the hinge axis 12 and the second leg 60 sees its bore 68 of the tubular sleeve deprived.

Cette première configuration permet aussi d'enfoncer l'axe 12 d'articulation, comme représenté à la figure 2, ou plus exactement enfoncer les deux flancs externes 30 ,32, les deux flancs internes 24, 26 et l'entretoise 28 sur l'axe 12 d'articulation, la tige 50 du vérin 44 recevant à son extrémité l'élément d'appui tubulaire 66 du diamètre interne supérieur à celui de l'axe 12 d'articulation, qui est alors destiné à prendre appui sur le flanc 32 externe du maillon 14 associé, et l'alésage 68 de la seconde branche recevant la douille 70 tubulaire borgne destinée à immobiliser l'axe 12 d'articulation et le flanc 30 du maillon externe 14 qui est opposé au vérin 44.This first configuration also makes it possible to drive the hinge axis 12, as shown in FIG. figure 2 , or more exactly drive the two outer flanks 30, 32, the two inner flanks 24, 26 and the spacer 28 on the axis 12 of articulation, the rod 50 of the cylinder 44 receiving at its end the bearing element tubular 66 of the inner diameter greater than that of the axis 12 of articulation, which is then intended to bear on the outer flank 32 of the associated link 14, and the bore 68 of the second branch receiving the blind tubular sleeve 70 for immobilizing the hinge pin 12 and the flank 30 of the external link 14 which is opposite the jack 44.

Il convient de noter que cette configuration peut aussi s'appliquer particulièrement à des axes 12 comportant un méplat du côté du flanc 30, axes ne pouvant par conséquent traverser ledit flanc 30. Dans ce cas, on ne peut à proprement parler d'enfoncement du flanc 30, celui-ci étant déjà solidaire de l'extrémité de l'axe 12.It should be noted that this configuration can also be applied particularly to axes 12 having a flank side flats 30, axes can therefore not cross said flank 30. In this case, it can not strictly speaking of depression. flank 30, it being already secured to the end of the axis 12.

De préférence, dans ce premier mode de réalisation, les deux branches parallèles 58, 60 sont venues de matière avec la branche 62 transversale de jonction. Les trois branches peuvent être réalisées par assemblage et soudage d'éléments en acier, ou par moulage d'un alliage pouvant être moulé par un procédé de fonderie, tel que de la fonte.Preferably, in this first embodiment, the two parallel branches 58, 60 are integral with the connecting transverse branch 62. The three branches can be made by assembling and welding steel elements, or by molding an alloy that can be molded by a foundry process, such as cast iron.

Avantageusement, la branche 62 transversale de jonction porte au moins une équerre réglable 72 transversalement dont une première branche 74 est fixée à la branche 62 transversale de jonction et dont une seconde branche 76 en saillie comporte une touche 78 de butée qui est tournée vers le côté intérieur 80 du flanc 30 du maillon externe 14 opposé au vérin 44. Cette touche 78 est destinée à permettre le pincement dudit flanc 30 entre la branche 76 de l'équerre et la seconde branche 60 du support.Advantageously, the transverse connecting branch 62 carries at least one transversely adjustable bracket 72, of which a first branch 74 is fixed to the transverse connecting branch 62 and of which a second projecting limb 76 has a stop button 78 which is turned towards the side inside 80 of the sidewall 30 of the external link 14 opposite the cylinder 44. This key 78 is intended to allow the pinch of said sidewall 30 between the branch 76 of the bracket and the second leg 60 of the support.

Pour permettre de s'adapter à différentes épaisseurs de flancs de maillons, l'équerre 72 réglable comporte :

  • au moins deux vis 82 qui traversent la première branche 62 et qui sont susceptibles d'être reçues dans deux taraudages d'une série de taraudages 84 pratiqués dans la branche transversale 62 du support 46 selon un espacement correspondant à celui des vis 82 de la branche 74 de l'équerre 72, pour proposer plusieurs positions de l'équerre 72 par rapport à la branche transversale 62,
  • au moins une vis 86 transversale de butée, qui traverse un taraudage formé dans la seconde branche 76 en saillie de l'équerre 72 et dont l'extrémité comporte la touche de butée 78, pour permettre un réglage précis de la position de la touche 78 de butée. On remarquera que la vis 86 peut être immobilisée par rapport à la seconde branche 76 de l'équerre 72 par un contre-écrou 88.
To make it possible to adapt to different thicknesses of link flanks, the adjustable bracket 72 comprises:
  • at least two screws 82 which pass through the first branch 62 and which are capable of being received in two threads of a series of threads 84 made in the transverse branch 62 of the support 46 in a spacing corresponding to that of the screws 82 of the branch 74 of the bracket 72, to propose several positions of the bracket 72 with respect to the transverse branch 62,
  • at least one transverse stop screw 86, which passes through a tapping formed in the second branch 76 projecting from the bracket 72 and whose end includes the stop button 78, to allow precise adjustment of the position of the key 78 stop. It will be noted that the screw 86 can be immobilized with respect to the second branch 76 of the bracket 72 by a counter nut 88.

Selon un second mode de réalisation de l'invention qui a été représenté aux figures 4 à 7, chaque support 46 comporte deux flasques 58, 60 parallèles réunis selon un écartement réglable par au moins une paire de tirants 94.According to a second embodiment of the invention which has been shown in Figures 4 to 7 each support 46 comprises two parallel flanges 58, 60 joined in a spacing adjustable by at least one pair of tie rods 94.

Un premier flasque 58 comporte le vérin 44 dont la tige 50 est susceptible de recevoir à son extrémité un élément d'appui 64 d'un diamètre correspondant à celui de l'axe 12 d'articulation ou bien un élément d'appui 66 tubulaire d'un diamètre interne supérieur à celui de l'axe 12 d'articulation.A first flange 58 comprises the jack 44 whose rod 50 is capable of receiving at its end a bearing element 64 of a diameter corresponding to that of the axis 12 of articulation or a bearing element 66 of tubular d an internal diameter greater than that of the axis 12 of articulation.

Un second flasque 60 comporte d'une part un alésage 96 d'un diamètre correspondant à celui de l'entretoise et est d'autre part constitué de deux demi-flasques 98, 100 démontables jointifs par un plan 102 passant par un diamètre dudit alésage 96. Cet alésage 96 est susceptible de recevoir sélectivement une douille 104 tubulaire borgne dont le perçage borgne est d'un diamètre correspondant à celui de l'axe 12 d'articulation. Les deux demi-flasques 98, 100 peuvent être assemblés l'un à l'autre par des vis 103 ou par tout autre moyen d'assemblage connu de l'état de la technique.A second flange 60 comprises on the one hand a bore 96 of a diameter corresponding to that of the spacer and is on the other hand consists of two half-flanges 98, 100 removable joined by a plane 102 passing through a diameter of said bore 96. This bore 96 is capable of selectively receiving a blind tubular socket 104 whose blind hole is of a diameter corresponding to that of the axis 12 of articulation. The two half-flanges 98, 100 may be assembled to one another by screws 103 or by any other assembly means known from the state of the art.

Dans cette configuration, le dispositif 10 permet, comme l'illustre la figure 6, d'extraire l'axe 12 d'articulation.In this configuration, the device 10 allows, as illustrated by figure 6 to extract the axis 12 of articulation.

Au cours de cette opération, la tige 50 du vérin 44 du premier flasque 58 reçoit à son extrémité l'élément 64 d'appui du diamètre correspondant à celui de l'axe 12 d'articulation et le second flasque 60 occupe une position transversale sur les tirants 94 telle que le second flasque 60 soit assemblé autour de l'entretoise 28 reçue dans l'alésage 96 privé de douille dudit second flasque 60. L'axe 12 peut alors être chassé au travers du second flasque 60 et de l'entretoise 28.During this operation, the rod 50 of the cylinder 44 of the first flange 58 receives at its end the bearing element 64 of the diameter corresponding to that of the axis 12 of articulation and the second flange 60 occupies a transverse position on the tie rods 94 such as the second flange 60 is assembled around the spacer 28 received in the bushing bore 96 of said second flange 60. The axis 12 can then be driven through the second flange 60 and the spacer 28.

Le dispositif 10 selon ce second mode de réalisation permet aussi, comme l'illustre la figure 7, d'enfoncer les deux flancs externes 30, 32, les deux flancs internes 24, 26 et l'entretoise 28 sur l'axe 12 d'articulation, la tige 50 du vérin 44 recevant à son extrémité l'élément 66 d'appui tubulaire du diamètre interne supérieur à celui de l'axe 12 d'articulation destiné à prendre appui sur le flanc externe 32 du maillon associé, et le second flasque 60 occupant une position transversale reculée sur les tirants 94 telle que les flasques 58, 60 soient agencés de part et d'autre des flancs 30, 32 du maillon externe 14. L'alésage 96 du second flasque 60 reçoit alors la douille 104 tubulaire borgne qui est destinée à immobiliser l'axe 12 d'articulation et le flanc 30 du maillon externe 14 opposé au vérin 44.The device 10 according to this second embodiment also allows, as illustrated by FIG. figure 7 , pushing the two outer flanks 30, 32, the two inner flanks 24, 26 and the spacer 28 on the axis 12 of articulation, the rod 50 of the cylinder 44 receiving at its end the bearing element 66 tubular inner diameter greater than that of the hinge pin 12 intended to bear on the outer flank 32 of the associated link, and the second flange 60 occupying a retracted transverse position on the tie rods 94 such that the flanges 58, 60 are arranged on either side of the flanks 30, 32 of the external link 14. The bore 96 of the second flange 60 then receives the blind tubular socket 104 which is intended to immobilize the hinge axis 12 and the flank 30 of the link external 14 opposite the cylinder 44.

Il convient de noter que cette configuration peut aussi s'appliquer particulièrement à des axes 12 comportant un méplat du côté du flanc 30, axes ne pouvant par conséquent traverser ledit flanc 30. Dans ce cas, on ne peut à proprement parler d'enfoncement du flanc 30, celui-ci étant déjà solidaire de l'extrémité de l'axe 12.It should be noted that this configuration can also be applied particularly to axes 12 having a flank side flats 30, axes can therefore not cross said flank 30. In this case, it can not strictly speaking of depression. flank 30, it being already secured to the end of the axis 12.

Dans les deux modes de réalisation préférés de l'invention, les corps 52 des vérins 44 sont alimentés en fluide hydraulique par les conduites latérales 45 elles-mêmes alimentées par un unique élément 54 hydraulique d'alimentation.In the two preferred embodiments of the invention, the bodies 52 of the cylinders 44 are supplied with hydraulic fluid by the lateral pipes 45 themselves fed by a single hydraulic supply element 54.

Tout élément 54 hydraulique d'alimentation connu de l'état de la technique peut convenir à la bonne mise en oeuvre de l'invention. L'élément 54 hydraulique d'alimentation peut notamment consister en une pompe manuelle actionnée par l'opérateur du dispositif 10. Toutefois, pour des raisons de facilité d'utilisation, et dans le but de minimiser la fatigue de l'opérateur l'élément 54 hydraulique d'alimentation est de préférence constitué d'une centrale hydraulique à alimentation électrique.Any hydraulic power element known from the state of the art may be suitable for the proper implementation of the invention. The hydraulic power element 54 may in particular consist of a manual pump actuated by the operator of the device 10. However, for reasons of ease of use, and in order to minimize operator fatigue the hydraulic supply element 54 is preferably constituted by a power supply hydraulic power unit.

Celle-ci présente notamment l'avantage d'être aisément portable et de pouvoir fournir une puissance hydraulique élevée propre à l'activation des vérins 44.This has the advantage of being easily portable and able to provide a high hydraulic power specific to the activation of the cylinders 44.

Comme l'illustre la figure 1, le dispositif 48 de commande commun aux deux vérins comporte l'unique élément 54 hydraulique d'alimentation et un distributeur hydraulique 56 qui est destiné à répartir le fluide hydraulique issu de l'unique élément 54 hydraulique d'alimentation entre les conduites 45 des deux vérins 44 pour provoquer le déplacement simultané desdits vérins 44. Il est en effet indispensable au bon fonctionnement du dispositif 10 que l'avancée des tiges des vérins 44 soit simultanée pour provoquer un enfoncement satisfaisant des flancs 32 du maillon 14 externes sur les axes 12 ou pour provoquer une extraction satisfaisante des axes 12.As illustrated by figure 1 , the control device 48 common to both cylinders comprises the single hydraulic supply element 54 and a hydraulic distributor 56 which is intended to distribute the hydraulic fluid from the single hydraulic supply element 54 between the pipes 45 of the two cylinders 44 to cause the simultaneous movement of said cylinders 44. It is indeed essential to the proper functioning of the device 10 that the advance of the rods of the cylinders 44 is simultaneous to cause a satisfactory depression of the flanks 32 of the external link 14 on the axes 12 or to cause a satisfactory extraction of the axes 12.

Le distributeur hydraulique 56 peut être réalisé de manière simple et économique à l'aide de deux vannes indépendantes manuelles qui permettent de réguler le début de fluide hydraulique alimentant chaque vérin 44 pour synchroniser manuellement les déplacements des deux vérins 44.The hydraulic distributor 56 can be produced in a simple and economical manner by means of two independent manual valves which make it possible to regulate the beginning of hydraulic fluid supplying each cylinder 44 to manually synchronize the movements of the two cylinders 44.

De préférence, le distributeur hydraulique 56 est un distributeur automatique permettant de synchroniser automatiquement le déplacement des tiges 50 des deux vérins 44 de manière synchronisée.Preferably, the hydraulic distributor 56 is a vending machine for automatically synchronizing the movement of the rods 50 of the two cylinders 44 in a synchronized manner.

L'invention permet donc avantageusement d'assembler ou de séparer des maillons internes 14 et externes 16 d'une chaîne de taille élevée, sans risque et sans fatigue pour l'opérateur en charge de cette manipulation.The invention therefore advantageously makes it possible to assemble or separate internal links 14 and external 16 of a high-size chain, without risk and without fatigue for the operator in charge of this manipulation.

Claims (14)

  1. A device (10) for the on-site fitting and extraction of pivot pins (12) of large-size chain links (14, 16), in particular of cement factory conveyor belts, which comprise alternating so-called external links (14) and so-called internal links (16), each internal link (16) comprising at least two parallel flanks (20, 22) pierced at their ends (24, 26), joined together at said ends (24, 26) by a tubular spacer (28), and articulated at said ends (24, 26) of the parallel flanks (20, 22) of the internal links (16) on the pierced ends (30, 32) of the parallel flanks (34, 36) of two consecutive external links (14) via associated pivot pins (12), said device (10) comprising at least one cylinder (44) which comprises:
    - at least one pair of portable cylinder supports (46), adapted to be fitted on site by an operator at the opposite ends of an external link (14),
    - two hydraulic cylinders (44) synchronized in displacement, each of which is received in one of the supports (46) and is intended to selectively urge an associated pivot pin (12) or the ends of a flank (32) of an associated external link (14) onto which the associated support (46) is fitted to push the associated pivot pin (12) through at least one end bore (31, 33) of the associated external link (14), the aligned end bores (25, 27) of the associated internal link (16), and the associated spacer (28), to simultaneously insert or extract the pins (12) associated with the two cylinders (44),
    - a control device (48) common to the two cylinders (44), each hydraulic cylinder (44) comprising a rod (50) which is moved by a hydraulic piston moveably mounted into a tubular body (52) which is fed by an associated lateral pipe, characterized in that said body (52) is mounted to pivot axially with respect to the associated cylinder support to allow a selective orientation of the pipe according to the space available around each portable cylinder support.
  2. The device according to the preceding claim, characterized in that each support (46) comprises a first branch (58) which is intended to be arranged at the end of a flank (32) of the external link (14) of the chain and which transversely receives a cylinder (44) for selectively urging the flank (32) of the external link (14) or the pivot pin (12), and a second branch (60), parallel to the first branch (58), which is intended to form an abutment member opposing the movement of at least one member among the flanks (24, 26, 30, 32) of the internal (16) or external (14) links, the spacer (28) or the pivot pin (12), in order to:
    - depress the two external flanks (30, 32), the two internal flanks (24, 26) and the spacer (28) on the pivot pin (12) when the cylinder (44) urges the flank (32) of an external link (14) and when the second branch (60) opposes the movement of the pivot pin (12), or
    - extract the pivot pin (12) when the cylinder (44) urges the pivot pin (12) and when the second branch (60) opposes the movement of at least one member among the flanks of the internal (16) or external (14) links and the spacer (28), by allowing the pin (12) to pass through the members, against the movement of which it does not oppose.
  3. The device according to the preceding claim, characterized in that the body (52) of each cylinder (44) comprises a pin, which extends opposite the rod from the body of said cylinder, which passes through a bore of a transverse wall of the first branch, which is pivotally mounted with respect to said bore, and which is axially immobilized with respect to the first branch.
  4. The device according to the preceding claim, characterized in that the pin is axially immobilized and pivotally mounted with respect to the first branch via a thrust ball bearing, in particular a single-acting thrust ball bearing, which is received on the pin in contact with the transverse wall of the first branch, and which is urged against said transverse wall via a compression spring which is threaded on the pin, and in particular centered on said pin via tapered rings, and which is secured at a threaded end of the pin by at least one locknut.
  5. The device (10) according to one of claims 2 to 4, characterized in that each support (46) is in the form of a stirrup comprising a joining transverse branch (62) joining together two parallel branches (58, 60) which are intended to be arranged on either side of the external link (14), the first branch (58) of which comprising the cylinder (44), the rod (50) of which is adapted to receive at its end a support member (64) of a diameter corresponding to that of the pivot pin or a tubular support member (66) of an internal diameter greater than that of the pivot pin (12), and the second branch (60) of which comprises a bore (68) of a diameter greater than that of the pivot pin (12) which is adapted to receive a blind tubular sleeve (70), the blind bore (71) of which is of a diameter corresponding to that of the pivot pin (12), in order to selectively:
    - extract the pivot pin, the rod (50) of the cylinder (44) receiving at its end the support member (64) of the diameter corresponding to that of the pivot pin (12) and the second branch (60) having its bore (68) deprived of the tubular sleeve,
    or
    - depress the two external flanks (30, 32), the two internal flanks (24, 26) and the spacer (28) on the pivot pin (12), the rod (50) of the cylinder (44) receiving at its end the tubular support member (66) of the internal diameter greater than that of the pivot pin (12), intended to bear on the external flank (32) of the associated link (14), and the bore (68) of the second branch receiving the blind tubular sleeve (70) intended to immobilize the pivot pin (12) and the flank (30) of the external link (14) opposite the cylinder (44).
  6. The device (10) according to the preceding claim, characterized in that the two parallel branches (58, 60) are integral with the joining transverse branch (62).
  7. The device (10) according to the preceding claim, characterized in that the joining transverse branch (62) supports at least one transversely adjustable bracket (72), a first branch (74) of which is attached to the joining transverse branch (62) and a second protruding branch (76) of which comprises an abutment key (78) which faces the inner side (80) of the flank (30) of the external link (14) opposite the cylinder (44), which is intended to allow said flank (30) to be clamped between the branch (76) of the bracket (72) and the second branch (60) of the support.
  8. The device (10) according to the preceding claim, characterized in that the adjustable bracket (72) comprises :
    - at least two screws (82) which pass through the first transverse branch (62) and which are likely to be received in two internal threads (84) of a series of internal threads (84) made in the transverse branch (62) of the support according to a spacing corresponding to that of the screws (82) of the branch (74) of the bracket (72), to provide several positions of the bracket (72) with respect to the transverse branch (62),
    - at least one abutment transverse screw (86), which passes through an internal thread formed in the second branch (76) protruding from the bracket (72) and the end of which comprises the abutment key (78), to provide a precise adjustment of the position of the abutment key (78).
  9. The device (10) according to one of claims 2 to 4, characterized in that each support (46) comprises two parallel flanges (58, 60) forming the first and second branches, joined together with an adjustable spacing by at least one pair of tie rods (94),
    a first flange (58) comprising the cylinder (44), the rod (50) of which is adapted to receive at its end a support member (64) of a diameter corresponding to that of the pivot pin (12) or a tubular support member (66) of an internal diameter greater than that of the pivot pin (12),
    and a second flange (60), comprising, on the one hand, a bore (96) of a diameter corresponding to that of the spacer and, on the other hand, consisting of two removable half-flanges (98, 100) joined by a plane (102) passing through a diameter of said bore, said bore (96) being adapted to selectively receive a blind tubular sleeve (104), the blind bore of which is of a diameter corresponding to that of the pivot pin (12), in order to selectively:
    - extract the pivot pin (12), the rod (50) of the cylinder (44) of the first flange (58) receiving at its end the support member (64) of the diameter corresponding to that of the pivot pin (12) and the second flange (60) occupying a transverse position on the tie rods (94) such that the second flange (60) is assembled around the spacer (28) received in the bore (96) deprived of said second flange (60),
    or
    - depress the two external flanks (30, 32), the two internal flanks (24, 26) and the spacer on the pivot pin, the rod (50) of the cylinder (44) receiving at its end the tubular support member (66) of the internal diameter greater than that of the pivot pin (12) intended to bear on the external flank (32) of the associated link, and the second flange (60) occupying a transverse position on the tie rods (94) such that the flanges (58, 60) are arranged on either side of the flanks (30, 32) of the external link (14), the bore (96) of the second flange (60) receiving the blind tubular sleeve (104) intended to immobilize the pivot pin (12) and the flank (30) of the external link (14) opposite the cylinder (44).
  10. The device according to one of the preceding claims, characterized in that the pipes are fed with hydraulic fluid by a single hydraulic feed member (54).
  11. The device (10) according to the preceding claim, characterized in that the control device (48) common to the two control cylinders (44) comprises the single hydraulic feed member (54) and a hydraulic distributor (56) which is intended to distribute the hydraulic fluid from the single hydraulic feed member (54) between the pipes of the two cylinders (44) to cause the simultaneous displacement of the two cylinders.
  12. The device (10) according to the preceding claim, characterized in that the hydraulic distributor (56) comprises two manual independent valves allowing to regulate the hydraulic fluid flow rate feeding each cylinder (44) to manually synchronize the displacements of the two cylinders (44).
  13. The device (10) according to claim 11, characterized in that the hydraulic distributor (56) is an automatic distributor allowing to automatically synchronize the displacement of the two cylinders (44) in a synchronized manner.
  14. The device (10) according to any one of claims 10 to 13, characterized in that the hydraulic feed member (54) consists of an electrically-powered hydraulic plant.
EP09800035.9A 2008-07-22 2009-07-16 Improvement to a device for inserting and extracting chain link pivot pins Not-in-force EP2313237B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0854963A FR2934191B1 (en) 2008-07-22 2008-07-22 IMPROVEMENT TO A DEVICE FOR INSERTING AND EXTRACTING AXIS OF ARTICULATING LINKS OF CHAINS
PCT/EP2009/059135 WO2010010035A1 (en) 2008-07-22 2009-07-16 Improvement to a device for inserting and extracting chain link pivot pins

Publications (2)

Publication Number Publication Date
EP2313237A1 EP2313237A1 (en) 2011-04-27
EP2313237B1 true EP2313237B1 (en) 2016-04-20

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ID=40380370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09800035.9A Not-in-force EP2313237B1 (en) 2008-07-22 2009-07-16 Improvement to a device for inserting and extracting chain link pivot pins

Country Status (5)

Country Link
US (1) US8544253B2 (en)
EP (1) EP2313237B1 (en)
CN (1) CN102159364B (en)
FR (1) FR2934191B1 (en)
WO (1) WO2010010035A1 (en)

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CN203803110U (en) * 2014-01-21 2014-09-03 瑞烨世纪（深圳）模型有限公司 Movable track model with simpleness, glue avoidance and dual-pin structure
WO2015143498A1 (en) * 2014-03-25 2015-10-01 Justoy Pty Ltd Retaining pin installation/removal tool and method
CN105215918A (en) * 2014-06-30 2016-01-06 杨奕超 Excavator bucket alligator loading and unloading device
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Also Published As

Publication number Publication date
FR2934191B1 (en) 2010-09-03
FR2934191A1 (en) 2010-01-29
EP2313237A1 (en) 2011-04-27
CN102159364B (en) 2014-08-06
WO2010010035A1 (en) 2010-01-28
US20110154799A1 (en) 2011-06-30
CN102159364A (en) 2011-08-17
US8544253B2 (en) 2013-10-01

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