EP1201594B1 - Système de télescopage d'une flèche de grue - Google Patents
Système de télescopage d'une flèche de grue Download PDFInfo
- Publication number
- EP1201594B1 EP1201594B1 EP00420221A EP00420221A EP1201594B1 EP 1201594 B1 EP1201594 B1 EP 1201594B1 EP 00420221 A EP00420221 A EP 00420221A EP 00420221 A EP00420221 A EP 00420221A EP 1201594 B1 EP1201594 B1 EP 1201594B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- block
- boom
- locking
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000000034 method Methods 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 10
- 230000008092 positive effect Effects 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 230000003100 immobilizing effect Effects 0.000 description 13
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 230000036961 partial effect Effects 0.000 description 7
- 210000000056 organ Anatomy 0.000 description 6
- 230000000295 complement effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 235000013290 Sagittaria latifolia Nutrition 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 2
- 238000012550 audit Methods 0.000 description 2
- 235000015246 common arrowhead Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 235000020004 porter Nutrition 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
Definitions
- the present invention relates to the technical field of arrows telehandlers of cranes, whether installed in a fixed position or carried by self-propelled mobile structures or not.
- the telescopic arrows are the most generally mounted on an orientable turret in azimuth with respect to a support structure and on which turret is articulated in site, an arrow constituted by at least three distinct telescopic elements.
- the first element is called basic and is usually linked to the axis of articulation in site
- the second element is said intermediate
- the third is said external and usually carries at least one arrow head pulley.
- an arrow of the type above provided for the existence of technical means capable of making telescoping possible under load, so as to be able to provide range adjustment capability in line with a certain point in relation to which the load was to be mounted, lowered, posed or removed.
- Such means are particularly expensive, must be designed so very robust and be very carefully maintained so that the essential function first can be assumed safely.
- such means represent a large mass that strikes the functional abilities of the arrow.
- This technique consists of appreciating a priori the scope to be conferred on the arrow so that it can, from its site of implantation, reach the point of support or removal, or even the locus of geometry, for example to circular part, that this point is likely to follow and then to adjust the arrow length.
- a straight-moving actuator inside a telescopic boom alternative that is, for example, linked to the base element and made relatively mobile by compared to the extreme element.
- such an actuator is constituted by a hydraulic cylinder of the double-acting type and predetermined single stroke which generally corresponds the longest reentry or exit run that any of the mobile elements, except of course the basic element considered as fixed.
- the first is to be able to keep locked the elements telescopic between them in the retracted position or in the extended position.
- the second is the need to be able to selectively support one any telescopic elements to ensure separation from the position he occupies and then the training to the new position sought by which a new lock must occur.
- this technology involves series of locking and handling devices that overlap and must to be subjected to an energy supply based on pressurized fluid whose distribution must be perfectly synchronized to achieve the desired result that pass, for example, during a telescoping out, necessarily by the respect a sequence of support for the element concerned, then unlocking the this element before engaging its relative sliding to the new position where a lock must be re-established.
- German application DE 43 44 795 in which between the actuator and each of the telescopic elements, means are provided for support in the same order as the previous request and means of locking which consist of the engagement of pins to be ordered separately in erasure or retraction stroke to release an element with respect to another.
- Such technology which may appear to be less technically that of the previous application, however, involves always implementing two types of control devices capable of selectively providing the link function between the actuator and any of the elements to be moved and the uncoupling said element to move relative to the next.
- the object of the invention is to propose a new telescoping technique and new means of implementation, so that it can be carried out in all Safety the above functions from equipment reduced in weight.
- An object of the invention is to be able to transfer, for the benefit of the realization of the arrow, the gain of weight thus obtained in order to reinforce the effectiveness of the latter without altogether overall mass can be considered changed to the point of reducing the functional.
- the object of the invention is to propose a new technique and new means of implementation which make it possible to achieve, from the combination of two technical means cooperating with each other, the two functions which, are the support or the temporary coupling between the actuator and the telescopic elements to be moved and, on the other hand, the unlocking of the latter relative to the surrounding element to allow relative movement and, conversely, the opposite functions when it is appropriate to immobilize in the new desired position any of the elements moved in order to then allow his uncoupling from the actuator.
- the subject of the invention is also an arrow making use of the means precedents.
- Fig. 1 shows an example of application of the object of the invention to a crane of the mobile and self-propelled type. Such an example is provided for illustrative purposes, because the object of the invention could be implemented just as well on a crane installed at a fixed position, or even on a similar installation.
- the crane according to fig. 1 comprises a platform or a chassis 1 carried by rolling members 2 constituted, for example in a known manner, by several motor-gear trains.
- the platform or chassis 1 comprises a driving cabin 3 housing one or more engines and / or thrusters.
- Side stabilizers 4 are provided on the chassis 1, substantially in front of the front and rear portions, to provide a stable attitude when commissioning the crane.
- the platform 1 also comprises a turret 5 which is orientable in azimuth on a vertical axis x-x ' .
- This turret 5 carries, by a horizontal axis of articulation 6, an arrow 7 which is orientable in site by means of a jack 8 .
- the arrow 7 is constituted by telescopic elements, for example four in number, the first 9, said base, is directly carried by the axis 6.
- the elements 10 and 11 are called intermediate, while the element 12 is said to be extreme and carries at least one arrow head pulley 13 .
- the arrow 7 is completed by at least one cable or the like 14 wound and / or unwound from a winch 15 and passing over the pulley 13 beyond which such a cable ensures the suspension of a load 16 .
- the turret 5 is, moreover, equipped with a cabin 18 called boom which allows the operation of the actuating means of the latter such as the cylinder 8, the winch 15, and a telescoping means 19 included in the arrow 7 and shown in phantom in FIG.
- a telescoping means such as 19 must be considered in absolute terms as falling within the known art, whereas the means according to the invention are provided to make possible, from such telescoping means 19, the re-entry and the individual output of each of the mobile telescopic elements, namely 10, 11, 12 and the immobilization of each of them in an extended position and in the retracted position.
- the means according to the invention involve a device which is able to allow the implementation of the telescoping method according to the invention as described below with reference in particular to FIG. 2 .
- Such a device comprises, first of all, the actuator 19 which is constituted so as to have, on the one hand, a fulcrum 20 in relation to the base element 9 and, on the other hand, a movable member 21 capable of being animated by a movement in rectilinear reciprocating stroke parallel to the axis YY 'of the arrow.
- the actuator 19 is aligned on such an axis.
- the actuator 19 is constituted by a hydraulic jack of the double-acting type, single-stage or single-stroke
- the rod 22 is integral with the fulcrum 20
- the body 23 is connected to the movable element 21 and is adapted to be worn, with possibility of relative guided displacement, by the end element 12.
- Such a possibility can, for example, be provided by means of a foot 24 provided rollers or the like 25 capable of cooperating with a guideway not shown.
- an actuator 19 of the above type can be considered, although its position is reversed, as not posing any hydraulic supply problem for the skilled person and this is the reason for which the pipes supply of the two chambers of such a jack are not illustrated in the drawings.
- the movable member 21 is constituted by a telescoping head which is advantageously integrated with the bearing of the cylinder body 23 opposite the bottom of the latter.
- the telescoping device comprises, moreover, a on the other hand, locking elements between the telescopic elements to immobilize them relatively in in and out positions and, on the other hand, means carried by the actuator to control these organs.
- each locking block 30 carried by the inner end portion of each telescopic member 10, 11 , 12.
- Each locking block 30 defines, as shown in Figs. 3 and 4, a well 31 opening from the upper face 32 of the block 30 and opening into a cage 33 containing a clamping member 34 with a tight rest position consisting of two jaws 35 which are always biased towards the one of the other by elastic members 36 ( Figure 5).
- the jaws 35 are arranged vis-a-vis by facing active faces which are situated on either side of a longitudinal median plane PP 'passing through the axis Y-Y'.
- Each block 30 also comprises a pusher 37 intended to cooperate with the jaws 35.
- the pusher 37 comprises for this purpose a shank 37 1 guided in the well 31 and whose actuating face 37 2 is oriented towards the face 32.
- the shank 37 1 is extended by a head 37 3 disposed in the cage 33 to cooperate by inclined faces 38 with ramps 39 that have the jaws 35 facing each other.
- the pushers 37 provided with a shank 37 1 of length such that the face 37 2 of each is established in the plane or on the line L in the clamping position of the clamp 34 as is apparent from the following.
- Each locking member further comprises at least one immobilization piece 40 with a fixed position which belongs to the telescopic element externally surrounding the one carrying the locking block 30 with which it must cooperate.
- Such an immobilizing piece 40 is, for example, advantageously constituted by a profile segment intended to be imprisoned and clamped by the faces facing the jaws 35 .
- the faces facing the jaws 35 are advantageously shaped in a manner conjugated to the flanks of the part 40 on which the jaws 35 are pressed by the springs 36.
- the piece 40 is formed in the form of a double rack with asymmetric teeth 41 formed in opposition on the two longitudinal edges of the piece.
- the asymmetrical teeth each have a face 42 substantially orthogonal to the longitudinal axis of the workpiece 40 and an inclined face 43
- the workpiece 40 is carried by the telescopic element so that the faces 42 are oriented in the direction of the boom head. Because of this double rack form, the opposite faces of the jaws 35 are provided with complementary conformations 44 conjugated to the teeth 41 (FIG 7).
- each block 30 has in its lower part a groove 45 ( Figure 4).
- Each piece 40 is fixed to the corresponding telescopic element to determine, when cooperating with the corresponding block 30 of the telescopic element which is internal to it, a fixed position.
- each element 9, 10 and 11 internally has two immobilization pieces 40 defining two cooperation positions for the corresponding immobilization block 30 of the immediately internal element, respectively 10 , 11 and 12. These two positions respectively correspond to the retracted position determined by the immobilizing part 40 1 and at an output position determined by the immobilizing part 40 2 .
- each element 9, 10 or 11 may also comprise other immobilization parts such as 40 3 intended to determine each an intermediate position.
- the immobilizing piece 40 may, in fact, be constituted by an uninterrupted profile 40 4 running over the entire useful length of each element 9, 10 or 11 or some of them, so as to define, as will be demonstrated later, the extreme positions of re-entry and exit, as well as n intermediate positions.
- the section 40 4 meets the constructive arrangements described above for the piece 40 .
- the device according to the invention also comprises means carried by the actuator 19 for controlling the organs described above.
- Such means generally designated 50 ( Figures 2, 5 and 8), are qualified as mobile and are provided in connection with the telescoping head 21 carried by the cylinder body 23 in the illustrated example.
- these means 50 comprise a member 51 able to occupy two relative positions under the action of a drive member 52. The first of these positions is the so-called erasure or retraction position and the second is said to support or coupling when the member 51 is able to cooperate with the locking block 30 of one of the mobile telescopic elements 10, 11 or 12.
- the member 51 is also intended to act on the clamping member 34 of each block 30 so as to neutralize, by positive action, its clamping function to release the locking block 30 with respect to the workpiece immobilization 40 with which it cooperates.
- the member 51 is designed to perform two functions that take place as described in the following.
- the member 51 is constituted by a pin formed for example by the piston rod of a jack constituting the motor member 52 .
- the motor member comprises a cylinder body 53 which is fixed on the telescoping head 21 so that the pin 51 can be engaged in the well 31 of one of the locking blocks 30 in its output position to exert pressure on the pusher 37 corresponding.
- the device according to the invention can also advantageously involve a reading cell 60 ( FIGS 2 and 8) carried by the telescoping head 21 and able to appreciate the presence of position sensors 61 fitted on the internal walls of the elements. 9, 10 and 11, as illustrated in FIG. 2.
- the position of the sensors 61 is determined to correspond to the position of the immobilizing parts 40 1 as well as to a position p of maximum retraction and of disablement of the actuator 19.
- the cell 60 is, moreover, also intended determining the presence of position sensors 62 which are provided to correspond to the immobilizing parts 40 2 . It could obviously be provided intermediate position sensors in relation to the parts 40 3 or with certain positions that can be defined from the part 40 4 .
- each mobile telescopic element namely 10, 11, 12 cooperates with the corresponding immobilization piece 40 1 carried by the immediately external element, namely 9 for the element 10 respectively. 10 for the element 11 and 11 for the element 12, in a relational situation illustrated in FIG. 5 .
- the springs 36 of each block 30 press the jaws 35 on either side of the corresponding immobilizing piece 40 which is trapped firmly.
- each element is immobilized axially with respect to the immediately external element surrounding it and can not be subjected to any sliding backwards, even if the arrow is inclined in elevation, because of the shape of the teeth 41 of the double rack 40 .
- the telescopic elements are all relatively immobilized in the retracted position and remain immobilized in such a passive safety state since the clamping members 34 are of the tight rest position type.
- the actuator 19 occupies for example the off position shown in phantom and corresponding to the position sensor p in a state of maximum retraction.
- the actuator 19 is controlled so as to move the telescoping head 21 to the level of the corresponding locking block 30 which is detected by the reading of the position sensor 61 carried by the telescopic element 12.
- the jack 52 When the telescoping head 21 places the pin 51 in line with the locking block 30, the jack 52 is energized so as to cause the extension stroke of the pin 51 which is thus caused to penetrate into the well 31. action results in temporarily coupling the head 21 with the block 30 and, consequently, to link the actuator 19 with the extreme telescopic element 12.
- the supply of the jack 52 is ensured so that the extension of the spindle 51 occurs over a length such that the latter presses on the actuating face 37 2 of the pusher 37 which controls, against the counteracting action of the springs 36, separating the jaws 35 releasing the immobilizing piece 40 .
- the pin 51 temporarily secures the actuator 19 and the movable member to move, and in a second step, releases the latter relative to the immediately outside element with respect to which it was immobilized.
- the actuator 19 is then controlled to be moved, for example, in the direction of the arrow f 1 (FIG 2) according to the sequence taken into account, so that its extension causes the displacement in the same direction of the element. mobile 12 which is telescoped in the output position.
- the supply or control of the actuator 19 occurs until the cell 60 detects the position of the sensor 62 carried by the element 11.
- the cylinder 52 is energized to cause the retraction of the pin 51 .
- the actuator 52 may be of the single direction, as illustrated in the drawing or of the double effect. It can of course be implemented any type of engine capable of performing the same function.
- the retraction of the spindle 51 causes, at first, a shrinkage sufficient to release the stress applied to the pusher 37 which can thus be erased to make predominant the actions of the springs 36 causing the closure and clamping of the jaws 35 on the workpiece 40 2 immobilization presented facing the element 11 in this case ( Figure 10 ).
- the retraction stroke of the spindle 51 produces, in a second time and after complete retraction, uncoupling relative to the locking block 30, so that the temporary connection between the telescoping head 21 and said block is broken.
- the telescoped element output in this case the element 12, is again immobilized relative to the element surrounding it, in this case 11, while the actuator 19 is uncoupled and it can be controlled in reverse order to regain the position p.
- the proposal according to the invention clearly makes it possible to simplify the locking, loading and actuating means by making a dual function assume each of them and in particular to the pin 51, while respecting in all the sequences that to unfold, a positive security automatically intervening
- the block 30 is mounted floating in or on the telescopic element which carries it.
- a floating assembly can for example be established as shown in FIGS. 3 and 5 by providing the block with grooves 63 intended to cooperate with a housing 64 formed in the corresponding telescopic element so as to leave a clearance J transverse to the longitudinal axis y-y '.
- Such a floating assembly has the advantage of allowing a cooperative adaptation between the members 30 and 40 and 30 and 50 despite the possible lateral deflections of the telescopic elements.
- the head 37 3 include a finger 37 4 or the like which is adapted to cooperate, in the unlocked position of the jaws 38 with a complementary groove 65 hollowed out longitudinally in the upper face. from room 40 ( Fig. 11 ).
- Figs. 4, 6, 7, 12 and 13 show that according to another advantageous arrangement, it may be provided to provide each block 30 with means immobilizing the jaws against any opening movement other than that controlled by the pushers 37.
- it is provided to surround the two jaws 35 by two half-rings 66, disposed in the block 30 with the interposition of springs 67 urging them to engage the jaws by shoulders 68 they form vis-à-vis.
- Each half-band comprises at least one spur 69 having an inclined ramp 70 placed in vertical cooperation relation with at least one complementary projection 71 that has the head 37 3 .
- the projection 71 acts on the ramp 70 which pushes the half-band to release the subsequent displacement in opening of the jaws 35 under the action of the head 37 3 .
- Fig. 14 shows an alternative embodiment in which the actuator 19 is constituted by a worm 80 which is connected by means of a geared motor unit 81 to the fixed part 20 which can then advantageously constitute a bearing for the one end of the screw, the other of which is mounted in a housing 82 carried by the foot 24 .
- the telescoping head 21 then constitutes a threaded body 83 cooperating with the worm 80 and which is immobilized in rotation for example between guides 84 linking the fixed bearing 20 to the housing 82.
- Fig. 15 shows another variant embodiment in which the actuator 19 is constituted by an endless chain 90 carried by sprockets 91 and 92 , one of which is said to be a reference and the other of which is said to be driven because of its connection with a motor member 93 such as a hydraulic or electric geared motor.
- a motor member 93 such as a hydraulic or electric geared motor.
- the pinions 91 and 92 are preferably carried by a beam-frame 94 meeting the above requirements of securing with the fixed point 20 and guiding relative displacement with respect to the element 12 by means of the foot 24, or from the rollers 25.
- the telescoping head 21 can then be advantageously constituted only by the body 53 of the motor unit actuating the pin 51.
- each member 51 in the form of a telescopic ram with two rods, one assuming the coupling function and the other the control function of the pushers 37.
- An example of embodiment is shown in FIG. 16 that the body 53 defines a cylinder 95 containing a piston 96 extended by a rod 97 to enter the well 31 to assume the function of coupling with the block 30.
- the rod 97 defines a cylinder 98 containing a secondary piston 99 extended by a rod 100 charged to act on the face 37 2 of the pusher 37.
- FIG. 16 shows in thick dashed lines that the cylinders 95 and 98 can be double-acting cylinders.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Description
- mettre en oeuvre sur chaque élément, hormis celui de base, un bloc de verrouillage incluant un organe de serrage à position de repos serrée
- faire coopérer l'organe de serrage de chaque bloc avec l'une au moins de pièces d'immobilisation, à position fixe, appartenant à l'élément concentrique extérieur à celui portant le bloc
- faire porter à l'actionneur un seul organe de prise en charge ou d'accouplement
temporaire et de desserrage positif à même d'agir sélectivement sur
chacun des blocs de verrouillage
- par action positive pour, d'une part, lier ledit actionneur audit bloc et, d'autre part, neutraliser l'action de l'organe de serrage sur la pièce d'immobilisation.
- par retrait-effacement pour, d'une part, immobiliser ledit bloc relativement à la pièce de serrage et, d'autre part, libérer l'actionneur par rapport audit bloc
- les organes de verrouillage sont constitués par :
- un bloc de verrouillage porté par chaque élément, hormis celui de base, et incluant un organe de serrage à position de repos serrée.
- au moins une pièce d'immobilisation, à position fixe, appartenant à l'élément extérieur concentrique à celui portant un bloc et destiné à coopérer avec l'organe de serrage dudit bloc,
- et les moyens d'actionnement de l'actionneur comprennent un seul organe
apte à
- prendre en charge sélectivement l'un quelconque des blocs pour accoupler temporairement l'actionneur à l'élément portant ledit bloc,
- neutraliser, par action positive, l'organe de serrage dudit bloc pour le libérer par rapport à la pièce d'immobilisation.
Claims (21)
- Procédé de télescopage d'une flèche de grue ou analogue composée de plusieurs éléments télescopiques (9-12) placés en relation d'appui mutuel par des cales de centrage, consistant à mettre en oeuvre un actionneur (19) à déplacement rectiligne alternatif disposé intérieurement à la flèche en étant lié à l'élément de base (9) de ladite flèche, à prévoir entre les éléments des organes de verrouillage en position rentrée et des moyens de verrouillage en position sortie desdits éléments et à mettre en oeuvre des organes d'actionnement desdits organes et moyens de verrouillage pour réaliser soit le verrouillage soit le déverrouillage desdits éléments placés en une position télescopée par l'actionneur, le procédé consistant à:mettre en oeuvre sur chaque élément, hormis celui de base, un bloc de verrouillage (30) incluant un organe de serrage (34) à position de repos serrée,faire coopérer l'organe de serrage de chaque bloc avec l'une au moins de pièces d'immobilisation (40), à position fixe, appartenant à l'élément concentrique extérieur à celui portant le bloc,faire porter à l'actionneur un seul organe (51) de prise en charge ou d'accouplement temporaire et de desserrage positif à même d'agir sélectivement sur chacun des blocs de verrouillage- par action positive pour, d'une part, lier ledit actionneur audit bloc et, d'autre part, neutraliser l'action de l'organe de serrage sur la pièce d'immobilisation.- par retrait-effacement pour, d'une part, immobiliser ledit bloc relativement à la pièce de serrage et, d'autre part, libérer l'actionneur par rapport audit bloc
- Procédé selon la revendication 1, caractérisé en ce qu'il consiste à doter chaque élément, hormis l'élément extrême, d'au moins deux pièces d'immobilisation (40 1 ) et (40 2 ) qui sont placées pour définir au moins deux positions de référence pour l'élément directement interne, savoir la position rentrée et une position sortie dudit élément interne.
- Procédé selon la revendication 1, caractérisé en ce qu'il consiste à doter chaque élément, hormis l'élément extrême, d'une pièce d'immobilisation (40 4 ) s'étendant sur toute la longueur utile de chaque élément pour définir, pour l'élément télescopique directement interne, n positions intermédiaires entre les positions rentrée et sortie.
- Procédé selon la revendication 1, caractérisé en ce que pour télescoper un élément de la flèche on :commande l'actionneur pour amener l'organe de prise en charge et de desserrage positif à l'aplomb du bloc de verrouillage dudit élémentimmobilise l'actionneur dans la position d'aplombcommande l'organe de prise en charge et de desserrage positif pour :en premier lieu, accoupler temporairement ledit organe au blocen second lieu, réaliser le desserrage dudit bloc et le libérer de la pièce d'immobilisation sur laquelle il était serré.commande l'actionneur en course rectiligne de manière à entraíner avec lui l'élément à télescoper relativement à l'élément de la flèche l'entourant extérieurementdétermine la nouvelle position recherchéeinterrompt la commande de l'actionneurcommande de façon inverse l'organe de prise en charge et de desserrage positif pour :en premier lieu, libérer le bloc qui est ramené dans sa position de repos serrée dans laquelle il emprisonne la pièce d'immobilisation correspondant à la nouvelle position, de façon à immobiliser élément relativement à celui qui l'entoure,en second lieu, désaccoupler l'organe de prise en charge et le bloc pour libérer l'actionneurcommande enfin l'actionneur pour le ramener dans une position de rétraction maximale.
- Flèche télescopique de grue comprenant :au moins trois éléments distincts télescopiques et concentriques dont un élément de base (9), au moins un élément intermédiaire (10) et un élement extrême (12),un actionneur (19) à déplacement rectiligne alternatif, interne à la flèche et lié à l'élément de base (9),des organes de verrouillage entre lesdits éléments pour immobiliser ces derniers relativement en positions rentrée et sortie et des moyens d'actionnement portés par l'actionneur pour commander lesdits organes, telle queles organes de verrouillage sont constitués par :un bloc de verrouillage (30) porté par chaque élément, hormis celui de base, et incluant un organe de serrage (34) à position de repos serrée.au moins une pièce d'immobilisation (40), à position fixe, appartenant à l'élément extérieur concentrique à celui portant un bloc et destiné à coopérer avec l'organe de serrage dudit bloc,les moyens d'actionnement de l'actionneur comprennent un seul organe (51) adapté pourprendre en charge sélectivement l'un quelconque des blocs pour accoupler temporairement l'actionneur à l'élément portant ledit bloc,neutraliser, par action positive, l'organe de serrage dudit bloc pour le libérer par rapport à la pièce
- Flèche selon la revendication 5, caractérisé en ce que les organes de verrouillage sont adaptés à l'extrémité interne des éléments de flèche et possèdent des organes de serrage (34) dont les moyens d'actionnement (37) sont dirigés selon une direction perpendiculaire à celle de déplacement de l'actionneur.
- Flèche selon la revendication 5 ou 6, caractérisé en ce que chaque organe de verrouillage comprend un bloc (30) solidaire de l'extrémité interne de l'élément auquel il appartient et qui délimite :un puits (31) d'engagement de l'organe de prise en charge (51),une cage (33) communiquant avec le puits et contenant deux mâchoires (35) associées à un poussoir (37) faisant face au puits et constituant un moyen d'actionnement simultané desdites mâchoires qui sont sollicitées toujours par des organes élastiques (36) en course de serrage sur une pièce d'immobilisation (40) qu'elles emprisonnent et qui est portée par l'élément de flèche dans lequel ledit élément est logé.
- Flèche selon la revendication 7, caractérisé en ce que les mâchoires comportent des faces de serrage conformées pour coopérer avec des flancs conjugués présentés par chaque pièce d'immobilisation.
- Flèche selon la revendication 7, caractérisé en ce que le bloc comporte à l'opposé du puits une saignée (45) pour le passage de la pièce d'immobilisation.
- Flèche selon l'une des revendications 5 à 9, caractérisé en ce que les organes de verrouillage font intervenir sur chaque élément télescopique, hormis l'élément extrême, au moins deux pièces d'immobilisation (40 1 ) et (40 2 ) alignées parallèlement à la direction de télescopage et définissant pour l'élément immédiatement interne deux positions prédéterminées de rentrée et de sortie.
- Flèche selon l'une des revendications 5 à 9, caractérisé en ce que les organes de verrouillage font intervenir sur chaque élément télescopique, hormis l'élément extrême, une pièce d'immobilisation constituée par un profilé (40 4 ) courant sur toute la longueur dudit élément pour définir, pour l'élément immédiatement externe, outre les deux positions de rentrée et de sortie, n positions intermédiaires d'immobilisation.
- Flèche selon la revendication 5, 7, 8, 10, ou 11, caractérisé en ce que la pièce d'immobilisation (40) présente la forme d'une double crémaillère dont chaque dent (41) est définie par une face (42) orthogonale à l'axe longitudinale de la pièce et orientée vers la tête de flèche et une face inclinée (43).
- Flèche selon la revendication 5 ou 6, caractérisé en ce que les poussoirs (37) des organes de verrouillage possèdent des queues (37 1 ) dont les faces d'actionnement (37 2 ) sont situées sur un même plan L parallèle à l'axe longitudinal y-y'.
- Flèche selon la revendication 5, caractérisé en ce que les moyens de commande de l'actionneur comprennent au moins une broche (51) mise en déplacement rectiligne alternatif par un organe moteur (52) afin de pouvoir occuper une première position d'escamotage par rapport au bloc de verrouillage et une seconde position dans laquelle, après arrêt en coïncidence avec l'un quelconque des blocs, elle fait saillie pour être engagée dans le puits afin d'accoupler temporairement l'actionneur à l'élément et pour agir sur le poussoir (37) et commander l'ouverture de l'organe de serrage (34) dudit bloc.
- Flèche selon la revendication 14, caractérisé en ce que la broche (51) est constituée par la tige de piston d'un vérin (53) formant organe moteur.
- Flèche selon la revendication 14 ou 15, caractérisé en ce que la broche ou son organe moteur sont portés par une tête de télescopage (21) appartenant à l'actionneur (19).
- Flèche selon la revendication 5, caractérisé en ce que l'actionneur est constitué par un vérin hydraulique dont la tige (22) est solidaire de l'élément de base (9) et dont le corps (23), pourvu de la tête de télescopage (21), est porté avec possibilité de déplacement relatif guidé par l'élément extrême (12).
- Flèche selon la revendication 5, caractérisé en ce que l'actionneur (19) est constitué par une vis sans fin (80), liée à un organe moteur (81) adapté sur l'élément de base (9) et porté avec possibilité de déplacement relatif guidé par l'élément extrême (12), ladite vis coopérant avec un corps taraudé (83) immobilisé en rotation et constituant la tête de télescopage (21).
- Flèche selon la revendication 5, caractérisé en ce que l'actionneur (19) est constitué par une chaíne sans fin (90) prise en charge par un pignon de renvoi (91) et par un pignon d'entraínement (92) montés sur un bâti-poutre (94) lié à l'élément de base (9) et porté, avec possibilité de déplacement relatif guidé, par l'élément extrême, la chaíne sans fin étant porteuse de la tête de télescopage (21).
- Flèche selon la revendication 5 ou 7, caractérisé en ce que le bloc (30) est monté flottant transversalement et possède un poussoir (37) muni d'une tête (37 3 ) prolongée par un doigt d'indexage (37 4 ) apte à coopérer avec une gorge (65) présentée par les pièces d'immobilisation (40).
- Flèche selon la revendication 5, 7 ou 20, caractérisé en ce que le bloc (30) comporte intérieurement deux demi-frettes (66) poussées par des ressorts (67) en engagement autour des mâchoires de serrage et portant chacune au moins une rampe d'écartement (70) sollicitée par une saillie (71) de la tête du poussoir.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9911102A FR2797862B1 (fr) | 1999-09-01 | 1999-09-01 | Procede de telescopage d'une fleche de grue, dispositif pour sa mise en oeuvre et fleche de grue en faisant application |
DE60023506T DE60023506T2 (de) | 2000-10-26 | 2000-10-26 | Telekopiersystem eines Kranauslegers |
EP00420221A EP1201594B1 (fr) | 1999-09-01 | 2000-10-26 | Système de télescopage d'une flèche de grue |
US09/709,736 US6474486B1 (en) | 1999-09-01 | 2000-11-13 | Method of telescoping a crane jib, apparatus for implementing the method, and a crane jib constituting an application thereof |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9911102A FR2797862B1 (fr) | 1999-09-01 | 1999-09-01 | Procede de telescopage d'une fleche de grue, dispositif pour sa mise en oeuvre et fleche de grue en faisant application |
EP00420221A EP1201594B1 (fr) | 1999-09-01 | 2000-10-26 | Système de télescopage d'une flèche de grue |
US09/709,736 US6474486B1 (en) | 1999-09-01 | 2000-11-13 | Method of telescoping a crane jib, apparatus for implementing the method, and a crane jib constituting an application thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1201594A1 EP1201594A1 (fr) | 2002-05-02 |
EP1201594B1 true EP1201594B1 (fr) | 2005-10-26 |
Family
ID=27223626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00420221A Expired - Lifetime EP1201594B1 (fr) | 1999-09-01 | 2000-10-26 | Système de télescopage d'une flèche de grue |
Country Status (3)
Country | Link |
---|---|
US (1) | US6474486B1 (fr) |
EP (1) | EP1201594B1 (fr) |
FR (1) | FR2797862B1 (fr) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2797862B1 (fr) * | 1999-09-01 | 2001-11-16 | Ppm | Procede de telescopage d'une fleche de grue, dispositif pour sa mise en oeuvre et fleche de grue en faisant application |
DE10104310B4 (de) * | 2001-01-22 | 2005-02-03 | Terex-Demag Gmbh & Co. Kg | Fahrzeugkran mit Teleskopausleger |
DE202004008083U1 (de) * | 2004-05-19 | 2005-11-10 | Liebherr-Werk Ehingen Gmbh | Mobilkran |
CN100567132C (zh) * | 2007-06-19 | 2009-12-09 | 李海青 | 轻型折臂式塔机起升-折臂机构的钢丝绳固定装置 |
US8322687B2 (en) * | 2008-04-22 | 2012-12-04 | Lift Systems, Inc. | Integrated wedge lock arrangement |
DE102009009944B4 (de) * | 2009-02-20 | 2011-02-24 | Terex-Demag Gmbh | Sicherungs- und Verbolzungseinheit |
WO2011123816A2 (fr) * | 2010-04-01 | 2011-10-06 | Par Systems, Inc. | Mât à support résistant |
CN102153023B (zh) * | 2011-04-07 | 2013-09-25 | 大连理工大学 | 起重机用插销互锁装置、单缸插销式伸缩臂及起重机 |
CN102735172B (zh) * | 2012-06-25 | 2015-04-01 | 三一重工股份有限公司 | 臂长测量装置及测量方法、伸缩臂架 |
WO2014047449A1 (fr) | 2012-09-21 | 2014-03-27 | Par Systems, Inc. | Ensemble de déploiement de bateau et procédé |
US10494233B2 (en) | 2013-02-06 | 2019-12-03 | Par Systems, Llc | Relocatable fine motion positioner assembly on an overhead crane |
DE102013006259B4 (de) * | 2013-04-11 | 2024-09-12 | Liebherr-Werk Ehingen Gmbh | Teleskopausleger und Kran |
DE102013011173B4 (de) * | 2013-07-04 | 2019-05-23 | Liebherr-Werk Ehingen Gmbh | Verfahren zur Montage eines Krans sowie Anlenkschuss, Teleskopausleger und Kran |
JP6223071B2 (ja) * | 2013-08-30 | 2017-11-01 | 株式会社タダノ | クレーン装置のブーム伸縮機構 |
CN104528541B (zh) * | 2014-12-15 | 2017-03-15 | 徐州重型机械有限公司 | 一种单缸插销式起重机油缸防过伸装置 |
CN105417409B (zh) * | 2015-12-29 | 2017-11-14 | 中联重科股份有限公司 | 单缸插销式伸缩臂的检测方法、装置、系统及工程机械 |
JP6668832B2 (ja) * | 2016-03-07 | 2020-03-18 | 株式会社タダノ | ブーム伸縮装置 |
WO2017189439A1 (fr) | 2016-04-25 | 2017-11-02 | Manitowoc Crane Companies, Llc | Grue dotée d'un mécanisme de verrouillage rotatif |
CN106185653B (zh) * | 2016-09-12 | 2017-08-29 | 周明凯 | 内置液压动力的同步伸缩臂 |
JP7034685B2 (ja) * | 2017-11-30 | 2022-03-14 | 株式会社加藤製作所 | クレーンのブーム伸縮装置の制御装置 |
CN108750976A (zh) * | 2018-07-02 | 2018-11-06 | 合肥市春华起重机械有限公司 | 一种新型伸缩式旋臂起重机 |
CN109879183B (zh) * | 2019-03-13 | 2020-05-15 | 中联重科股份有限公司 | 吊臂的节臂尾部滑块的定位方法、定位装置及定位套件 |
JP7416055B2 (ja) * | 2019-04-04 | 2024-01-17 | 株式会社タダノ | 作業機 |
JP7424370B2 (ja) * | 2019-04-04 | 2024-01-30 | 株式会社タダノ | 作業機 |
JP7279579B2 (ja) * | 2019-08-21 | 2023-05-23 | 株式会社タダノ | 作業機 |
JP7226184B2 (ja) * | 2019-08-21 | 2023-02-21 | 株式会社タダノ | 作業機 |
CN111908356B (zh) * | 2020-07-30 | 2022-06-14 | 杭州瑞林机械有限公司 | 一种可伸缩式的施工塔吊臂 |
CN112777498B (zh) * | 2021-03-23 | 2022-07-05 | 三一汽车起重机械有限公司 | 一种伸缩臂结构及起重机 |
CN113682983B (zh) * | 2021-09-09 | 2023-05-23 | 大洋泊车股份有限公司 | 一种登高平台消防车伸缩臂稳固系统 |
CN118637490B (zh) * | 2024-08-15 | 2024-11-26 | 中铁三局集团有限公司 | 一种辙岔专用吊装设备 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9013210U1 (de) * | 1990-09-18 | 1991-01-03 | Liebherr-Werk Ehingen Gmbh, 7930 Ehingen | Teleskopiersystem mit verringerter Knicklänge des Teleskopierzylinders |
EP0488990A1 (fr) * | 1992-02-01 | 1992-06-03 | Krupp Industrietechnik Gmbh | Flèche télescopique entraînée par un seul cérin à vis |
FR2708584B1 (fr) * | 1993-08-06 | 1995-10-27 | Ppm | Dispositif de commande sélective du déplacement simultané ou télescopique synchronisé de deux éléments constitutifs d'une flèche télescopique de grue. |
DE4344795A1 (de) * | 1993-12-28 | 1995-06-29 | Liebherr Werk Ehingen | Fahrbarer Kran mit einem Teleskopausleger |
DE29824453U1 (de) * | 1997-05-28 | 2001-03-01 | Mannesmann AG, 40213 Düsseldorf | Kran mit einem Teleskopausleger |
DE19811813B4 (de) * | 1998-03-18 | 2005-11-24 | Grove U.S. LLC (n.d.Ges.d.Staates Delaware) | Seitliche Auslegerverriegelung |
FR2797862B1 (fr) * | 1999-09-01 | 2001-11-16 | Ppm | Procede de telescopage d'une fleche de grue, dispositif pour sa mise en oeuvre et fleche de grue en faisant application |
-
1999
- 1999-09-01 FR FR9911102A patent/FR2797862B1/fr not_active Expired - Fee Related
-
2000
- 2000-10-26 EP EP00420221A patent/EP1201594B1/fr not_active Expired - Lifetime
- 2000-11-13 US US09/709,736 patent/US6474486B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2797862A1 (fr) | 2001-03-02 |
US6474486B1 (en) | 2002-11-05 |
EP1201594A1 (fr) | 2002-05-02 |
FR2797862B1 (fr) | 2001-11-16 |
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