EP2740701B1 - Dispositif d'étrier pour le déplacement de grandes structures mobiles - Google Patents

Dispositif d'étrier pour le déplacement de grandes structures mobiles Download PDF

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Publication number
EP2740701B1
EP2740701B1 EP11870249.7A EP11870249A EP2740701B1 EP 2740701 B1 EP2740701 B1 EP 2740701B1 EP 11870249 A EP11870249 A EP 11870249A EP 2740701 B1 EP2740701 B1 EP 2740701B1
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EP
European Patent Office
Prior art keywords
rack
toothed
crankshafts
movement
previous
Prior art date
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Active
Application number
EP11870249.7A
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German (de)
English (en)
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EP2740701A1 (fr
EP2740701A4 (fr
Inventor
Alberto VIZCARGÜENAGA VIZCARGÜENAGA
Javier ARIÑO VIAR
Pedro AMPUERO CASTELLANOS
Ramón CAMPO DELGADO
Alberto GOMEZ MERCHÁN
Oscar VEGA BEASCOA
Borja ETXEITA ARRIAGA
Gaizka MURGA LLANO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idom Sau
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Idom SAU
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Publication of EP2740701A4 publication Critical patent/EP2740701A4/fr
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Publication of EP2740701B1 publication Critical patent/EP2740701B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/02—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with racks actuated by pinions

Definitions

  • the present invention relates to a climbing device according to the preamble of claim 1.
  • This is a device both for moving large movable or rotatable structures, such as stadium covers, astronomical telescopes gates, wind turbine structures, scenarios for shows, and for loading and/or unloading merchant ships, etc.
  • the caterpillar mechanisms offer a larger number of teeth in contact and therefore are more compact, rigid and stronger. Mechanisms of this type are used, for example to move a drag chain that rests directly on the ground (this type of traction is commonly used in heavy vehicles).
  • Document WO9711290 discloses a drive unit for conveying devices, e.g. for platforms of work, lifts and similar equipment, which are used for the transport of persons and/or material and that, together with the drive unit, can travel in any direction of movement along a track that has a longitudinal serrated profile presenting the drive unit a set of caterpillars, whose segments circulate in any direction around at least one drive wheel and at least one of them fits into the serrated profile associated with the transport track, leading to their displacement in any direction of movement.
  • Document GB2130682 discloses a drive mechanism for a hoist consisting of a motor-operated two pinions which in turn gears with the zipper of the hoist. These pinions are driven by a common pinion that is mounted on the output shaft of a gearbox, which is free to move allowing the drive to be automatically scaled in such a way that the transmission is carried out equally to the two pinions.
  • the mechanism of the present invention is similar to a caterpillar-like mechanism; insofar it consists of a rack on which a number of toothed members move. Said toothed members are arranged longitudinally with regard to said rack and are driven by means of a crankshaft-like eccentric mechanism, in such away that each toothed member describes a circular movement above the rack, coupling itself into the rack while pushes it in the forward direction and then separates from it to move backwards, opposite to the forward direction thereof, to couple itself once again in a rearmost position and begin pushing anew, once that due to its circular motion it has come down to couple itself one more time into the rack.
  • the movement is more accurate than that of a conventional mechanism given that the teeth pitch of each toothed member may be substantially shorter than that of any circular pinion developed for the same drag power.
  • toothed members Inasmuch the number of toothed members is relatively high, a minimum of 3 to 9 toothed members are placed, preferably 6, and at all times at least one these toothed members is in gear with the rack, thus realizing a very precise displacement, and even if a strong traction force is exerted, the stress on each tooth is substantially lower than that of on a conventional rack-pinion mechanism, given that the total force is divided by the number of teeth.
  • the mechanism is designed so that at least all the teeth of one toothed member (and sometimes two) are in contact with the rack at any given time, such that there will always be a high number of teeth in contact, unlike the pinion-rack type mechanisms in which the average number of teeth in contact is always less than two; consequently, the effort at each tooth is minimized, even with a drag force substantially weaker, therefore the teeth can be much smaller and a more accurate and reliable displacement system can be achieved.
  • the main benefits of the mechanism when compared with traditional transmission systems of large movable structures is that it is more efficient and compact if we take into consideration the speed required for a given application. It further provides a very strong connection between the fixed portion (referential) of the structure and the movable structure, thus ensuring a great degree of accuracy of the required position and a smooth operation.
  • crankshafts To carry out the circular movement of the toothed members, coupled into the rack during the forward motion and uncoupled during their backward motion, these are mounted on two crankshafts whose eccentrics determine through their rotation the position of each toothed member. Both crankshafts are equal and are synchronized or mounted in the same position so the movement at the ends of the two toothed member is uniform and the body thereof remains in a horizontal position above the rack at all times.
  • the set of toothed members along with their crankshafts and remaining elements of the device are mounted on a frame that has two closing plates, which incorporate bushes for the crankshafts and bearings for a series or rollers supporting the mechanism on the rack, upon which falls the burden of supporting the weight of the system, in such a way that the driving toothed members do not suffer in this sense, since they do not support any weight.
  • the fact that the device is supported on a set of rollers makes it possible to prevent sliding friction from building up at the point of contact of the drive mechanism, which increases efficiency in the mechanism and reduces wear in the toothed members and rollers.
  • the one single point of friction takes place at the contact point between the rollers and pins of the rack, where the distribution of pressure is more uniform. In this sense, the operation of the device is more similar to a pinion-chain system than to a rack system.
  • said frame incorporates trunnions mounted on spherical knuckle joints, on which the movable structure is supported, transmitting the weight to the mechanism, and the latter, through the supporting wheels transmits it to the fixed structure, made up in this case by a rack upon which the load moves.
  • On the frame of the climbing device another additional set of vertical wheels is mounted, which prevents it from rising at any given time; these wheels rest on another track installed opposite, enduring the reactions caused by the pressure angle of the toothed member contact.
  • figure 4 is a sectional view according to a vertical plane cut along the line indicated as A-A in the previous figure.
  • the device for moving large movable structures is interposed within the fixed structure, which incorporates a rack on which moves the mobile structure, supported on different devices of this kind positioned at various locations conveniently distributed in accordance with the structure to move.
  • Each device is driven by two synchronized servomotors (1) that move the respective crankshafts (3), which are mounted on a frame formed by two closing plates (5), in which the bushes and bearings by means of which said crankshafts and various wheels or rollers (4,6) rotate, are mounted.
  • a series of toothed members (2) are mounted, arranged parallel to one another and relative to the rack or forward line of the device.
  • the teeth (8) of the toothed members (2) are configured according to the pitch of the fixed rack, so they can be mechanically coupled into it.
  • each one of the toothed members When the two crankshafts (3), crossing them transversally, rotate, each one of the toothed members performs a movement determined by the respective eccentrics of the respective crankshafts in the coupling area of the toothed member, which present at all moments the same arrangement so the toothed member is always in the horizontal position and carries out a rotational movement about two lateral axis, which coincide with the respective crankshafts, which movement is translated longitudinally into an approximation and dragging movement of the device upon its resting onto the rack immediately followed by its separation from the rack and backwards movement to a previous position.
  • the number of toothed members is 6, which is the number that was considered to be the most suitable for this solution; however, a device could be designed and constructed with a number of toothed members comprised between 3 and 9.
  • the angular offset between the eccentrics, which coincide with each toothed member (2) of each crankshaft (3) is such that at all times at least one toothed member is coupled into the rack pushing the movable portion of the device; although sometimes there are two toothed members coupled into the rack on which the device moves, in such a way that there is a high number of teeth in gear with the rack
  • the set of toothed members (2) and crankshafts (3) is mounted on a frame having two closing plates (5) in which the bushes for the two crankshafts (3) are mounted. Between said plates (5), on a number of bearings, two rollers or crenelated wheels (4) are mounted, by means of which the device is supported on the rack, in such a way that those rollers are the ones supporting the weight of the movable structure instead of the toothed members that only assumes the displacement function so their teeth are not subject to a high stress.
  • two trunnions (6) are mounted at both ends, by means of bearings or spherical knuckle joints.
  • the purpose of these trunnions is to support the movable structure, which transmits its weight at these points to the frame and the latter through the supporting wheels (4) to the fixed structure through the rack with which is provided.
  • the device is completed by the respective bushes on which a series of vertical wheels (7) are mounted, which rest on a track located opposite.
  • the purpose of these wheels is to avoid the device from rising for any reason whatsoever.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)

Claims (5)

  1. Dispositif d'étrier pour déplacer de grandes structures déplaçables du type qui a une crémaillère fixe, sur laquelle le mécanisme d'entraînement supportant la structure déplaçable se déplace, ledit mécanisme étant situé sur plusieurs points convenablement répartis suivant la structure à déplacer, dont chacun est actionné par un ou deux servomoteurs synchronisés, caractérisé en ce que ledit dispositif est constitué d'une série d'éléments dentés (2), parallèles entre eux et par rapport à la crémaillère, dont les dents (8) sont configurées suivant le pas de la crémaillère fixe de telle façon qu'elles peuvent s'accoupler mécaniquement à celle-ci ; chacun desdits éléments dentés est monté sur deux vilebrequins égaux (3), qui les traversent transversalement et tournent, à l'unisson et de manière synchronisée, dans des douilles extrêmes, réalisant un mouvement de rotation dans lequel les deux excentriques, correspondant à chaque élément denté, ont la même disposition en tout temps de telle façon que l'élément denté est toujours en position horizontale, effectuant un mouvement de rotation autour de deux axes latéraux, qui coïncident avec les vilebrequins respectifs, dont le mouvement est transmis longitudinalement en un mouvement d'approche et d'entraînement du dispositif lorsqu'il s'appuie sur la crémaillère immédiatement suivi de sa séparation de la crémaillère et de son mouvement en arrière vers une position antérieure.
  2. Dispositif, selon la revendication 1, caractérisé en ce que le nombre d'éléments dentés est compris entre 3 et 9, alors que le décalage angulaire entre les excentriques qui coïncident avec chaque élément denté (2), de chaque vilebrequin (3), est tel qu'à tout moment au moins un élément denté est accouplé dans la crémaillère poussant la partie déplaçable du dispositif.
  3. Dispositif, selon les revendications précédentes, caractérisé en ce que l'ensemble d'éléments dentés (2) et de vilebrequins (3) est monté sur un châssis présentant deux plaques de fermeture (5) dans lesquelles les douilles pour les deux vilebrequins (3) sont montées, ainsi que des roulements pour au moins deux galets (4), à travers lesquels le dispositif est supporté sur la crémaillère, retombant sur eux la charge de supporter le poids de la structure déplaçable.
  4. Dispositif, selon les revendications précédentes, caractérisé en ce que le châssis (5) a à ses extrémités, des tourillons respectifs (6), montés sur des roulements ou rotules circulaires, sur lesquels la structure déplaçable est supportée, transmettant ainsi le poids aux galets rotatifs (4) et ces derniers à la structure fixe à travers la crémaillère avec laquelle elle est fournie.
  5. Dispositif, selon les revendications précédentes, caractérisé en ce que le châssis (5) incorpore au moins un couple de roues verticales (7) qui s'appuient sur une piste située en regard, roues qui empêchent le dispositif de monter à n'importe quel temps donné.
EP11870249.7A 2011-08-01 2011-08-01 Dispositif d'étrier pour le déplacement de grandes structures mobiles Active EP2740701B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2011/070568 WO2013017704A1 (fr) 2011-08-01 2011-08-01 Dispositif d'étrier pour le déplacement de grandes structures mobiles

Publications (3)

Publication Number Publication Date
EP2740701A1 EP2740701A1 (fr) 2014-06-11
EP2740701A4 EP2740701A4 (fr) 2015-04-15
EP2740701B1 true EP2740701B1 (fr) 2016-06-01

Family

ID=47628661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11870249.7A Active EP2740701B1 (fr) 2011-08-01 2011-08-01 Dispositif d'étrier pour le déplacement de grandes structures mobiles

Country Status (3)

Country Link
EP (1) EP2740701B1 (fr)
ES (1) ES2576181T3 (fr)
WO (1) WO2013017704A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3033861A1 (fr) 2015-03-16 2016-09-23 Franck Olivier Loriot Dispositif de transmission de mouvement pour utilisation principalement dans un bras de robot

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130682B (en) * 1982-11-19 1986-03-19 Wickham & Co Limited D Improvements in gear mechanisms
DE3939762A1 (de) * 1989-12-01 1991-06-06 Boecker Albert Gmbh & Co Kg Bauaufzug fuer den material- und/oder personentransport
DE19534647A1 (de) * 1995-09-19 1997-03-20 Paul Lingen Kombiniertes mechanisches Getriebe

Also Published As

Publication number Publication date
EP2740701A1 (fr) 2014-06-11
EP2740701A4 (fr) 2015-04-15
WO2013017704A1 (fr) 2013-02-07
ES2576181T3 (es) 2016-07-06

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