EP1024926A1 - Improvement for clamping device comprising a lever actuated by a piston - Google Patents

Improvement for clamping device comprising a lever actuated by a piston

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Publication number
EP1024926A1
EP1024926A1 EP98951545A EP98951545A EP1024926A1 EP 1024926 A1 EP1024926 A1 EP 1024926A1 EP 98951545 A EP98951545 A EP 98951545A EP 98951545 A EP98951545 A EP 98951545A EP 1024926 A1 EP1024926 A1 EP 1024926A1
Authority
EP
European Patent Office
Prior art keywords
damping
clamping device
piece
piston rod
clamping
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.)
Withdrawn
Application number
EP98951545A
Other languages
German (de)
French (fr)
Inventor
Thierry Bergamaschi
André Bouchet
Fernand Ferroud-Plattet
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.)
Robotic
Original Assignee
Robotic
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robotic filed Critical Robotic
Publication of EP1024926A1 publication Critical patent/EP1024926A1/en
Withdrawn legal-status Critical Current

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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
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/12—Arrangements for positively actuating jaws using toggle links
    • B25B5/122—Arrangements for positively actuating jaws using toggle links with fluid drive

Definitions

  • the present invention relates to a clamping device comprising a lever actuated hydraulically or pneumatically by a piston of the type used to hold parts to be machined or welded. It relates more particularly to a damping device fitted to the clamping device.
  • clamping devices are known of the type comprising a jack controlling the pivoting of a lever arm by means of a connecting rod or of several rods, in particular the clamping devices described in the French patent applications published FR -A-2 340 798 and FR- A-2 536 323.
  • Document FR-A-2 183 689 discloses such a tightening device comprising a stop, axially adjustable, in order to limit the stroke of the piston of the jack.
  • the function of this stop is to ensure precise positioning of the stirrup.
  • the present invention aims to remedy the aforementioned drawbacks of clamping devices by means of simple, reliable, inexpensive and which in particular allow to significantly increase the speed of positioning of the lever in the released position, the life of the clamping device, while reducing the noise nuisance it generates during its operation. It also makes it possible to avoid premature wear of the tightening device itself and of the jack controlling the device or of its piston rod. These objectives being achieved with great precision in the positioning of the lever in the released position.
  • the clamping device intended to retain a construction part to be machined or welded is of the type comprising a lever mounted pivoting about an axis of rotation relative to a device body to be pivotally actuated by the displacement of the piston rod of a cylinder with a longitudinal axis between a first position called inactive release position or detent position, and a second position called active clamping position, said lever being connected to the end of the piston rod by means of control and connection means, and is characterized in that it comprises damping means external to the jack intended to absorb the shocks caused in the moving parts of the control and connection means when the piston rod returns to its detent position which corresponds to the inactive position of the clamping lever.
  • the piston rod, an intermediate connecting piece or an abutment and distribution piece integral in movement with said rod at least when the latter moves close to its relaxed position has an abutment surface intended to come into abutment on a complementary bearing surface integral with the body of the device or of the jack when said jack is in the released position.
  • the damping means comprise at least one damping piece intended to be compressed when the abutment surface lands on the bearing surface.
  • the damping piece is fixedly arranged in a damping chamber located in the lower part of the body of the device.
  • the abutment surface comprises an abutment and distribution part arranged above the damping part of the device.
  • the damping piece and the distribution and stop piece each have in a transverse plane a rectangular section of substantially identical length, the width of the stop piece being greater than the width of the damping piece so that said abutment piece has laterally on the periphery of its lower face the movable abutment surface.
  • the complementary bearing surface comprises at least one hollow profile disposed on the side wall (s) of a damping chamber forming the lower part of the body of the device.
  • the damping means are produced using a damping material such as foam or plastic.
  • the damping material has a significant anti-rebound capacity, that is to say a capacity to prevent rebound after the impact.
  • the damping material is a flexible polyurethane.
  • Figures 1 and 2 schematically illustrate in side view a clamping device capable of comprising damping means MA, respectively in passive and active positions.
  • FIG. 3a illustrates in longitudinal section an embodiment of the device in its active position.
  • Figure 3b illustrates in a view similar to Figure 3a the device in the intermediate position.
  • Figure 3c shows in a view similar to Figure 3a the clamping device in passive position or relaxation position.
  • Figure 4a shows in cross section the clamping device in the active position.
  • Figure 4b illustrates in a view similar to Figure 4a the clamping device in the intermediate position.
  • FIG 4c illustrates in a view similar to Figure 4a the clamping device in the passive position.
  • the clamping device 1 comprises a clamping lever bearing the general reference 2 mounted pivoting about a transverse axis of rotation 3 on a device body 4, allowing said lever to be movable between two positions, a first position A, called inactive position for releasing the part to be welded or machined, and a second position B, called the active clamping position, as shown in FIGS. 1 and 2.
  • the clamping lever 2 is pivotally actuated around its axis 3 by the displacement of the piston rod 6 of a cylinder 7 with a longitudinal axis ZZ ′ by means of control and connection means MC such as, for example, a set of pivot axes and connecting rods.
  • the clamping device 1 is provided with damping means MA, said damping means being intended to absorb the shocks caused during the docking of the various moving parts of the device, in particular when the clamping lever 2 is positioned in one of its extreme positions.
  • the damping means MA are advantageously intended to absorb the shocks caused by the piston rod 6 of the jack 7 when it passes to its passive position or detent position, that is to say towards its position which corresponds to the inactive position of the device clamping lever.
  • the piston rod 6 carries at its upper end 8 an intermediate connecting piece 21 on which is articulated at least one connecting rod 16 around a main pivot axis 22.
  • the connecting rod 16 is articulated at its other end on the clamping lever 2 and more particularly on the embedding part 13 proper of the clamping lever 2 around a secondary pivot axis 23 so as to constitute the means of control and MC connection of the device.
  • the body 4 of the clamping device 1 comprises an upper part 9a inside which pivots the clamping lever 2, and a lower part 9b in which the piston rod 6 of the jack slides. that the clamping device 1 comprises means for fixing said cylinder, so as to allow adaptation to said device of several types of cylinder, as well as the easy replacement of a defective cylinder.
  • the upper part 9a of the body 4 of the clamping device has the general shape of a yoke 10 which is formed by two parallel side walls 10a, 10b creating between them a slot 11 intended for the passage of the lever 2, said parallel side walls 10a, 10b, are also pierced with a transverse hole of axis XX 'in which is engaged the transverse axis of rotation 3 of the lever 2, as shown in Figures 4a, 4b and 4c.
  • the control means MC proper of the device are arranged in the upper part 9a of the body 4.
  • Said lever 2 comprises a lever arm 14 extending an embedding part 13 which constitutes its actuation and pivoting part on which the connecting rod 16 of the control and connecting means MC is pivotally mounted.
  • the lower part 9b of the body 4 forms a first closed chamber 17, inside which slides the piston rod 6 of the clamping device 1. Note that it also forms a second chamber 40, called the damping chamber, arranged just above the cylinder 7 inside which are arranged the damping means MA.
  • the lower part 9b of the body 4 thus consists of two side walls 18a, 18b respectively extending the two parallel side walls 10a, 10b of the yoke 10 as well as a rear wall 19 and a front wall 20, the rear wall advantageously extending to the slot 11 of the yoke 10.
  • the lower part 9b of the clamping device 1 is mounted directly on a pneumatic or hydraulic cylinder 7 with a longitudinal axis ZZ ′, the end 8 of the piston rod 6 of which is intended to move substantially vertically between an expansion position A, illustrated in Figures 1, 3c and 4c, corresponding to the inactive position of the lever 2 and a so-called locking position B, illustrated in FIGS. 2, 3a and 4a, where the lever is in its active clamping position.
  • the intermediate connecting piece 21 comprises an end wall 21c and a vertical wall 21a.
  • Said vertical wall carries transversely at its upper end the main pivot axis 22 on which is mounted the connecting rod 16 which can be constituted by a double rod 16a, 16b, as shown in Figures 4a to 4c.
  • Said axis 22 is provided at each of its ends with a roller or end bearing 24a, 24b, intended to be guided in its substantially vertical movement by MG guide means such as longitudinal grooves or blind lights located on the side walls 10a, 10b, 18a, 18b of the body 4 of the clamping device 1.
  • the connecting rods 16a, 16b are mounted at one of their ends around the vertical wall 21a of the intermediate piece 21 and at the other of their ends around the embedding part 13 of the lever 2.
  • the device comprises thus two parallel connecting rods arranged on either side of the sliding part and the embedding part of the lever.
  • the links 16a, 16b and their axis 22 could be mounted directly on the end of the piston rod, for example.
  • the device could comprise a single billet or several connecting rods hinged together.
  • the intermediate connecting piece 21 or the piston rod 6 has a movable abutment surface intended to come to rest on a complementary bearing surface integral with the body 4 of the device, when the latter is in the inactive or detent position.
  • the latter comprises a movable abutment surface 30a intended to come to bear on a complementary bearing surface 31 of the body 4, said abutment surface being disposed on a distribution piece and stop 30 integral in movement with the piston rod 6 when the latter moves close to its relaxed position, as will be described later.
  • the damping means MA are arranged so as to damp the docking between the movable abutment surface 30a and the complementary bearing surface 31, said docking being thus carried out with a reduced speed compared to traditional clamping devices so to limit the shocks or to absorb a good part of them and by giving a precise position to the lever by limiting its stroke.
  • the damping means MA comprise a damping piece 50 fixedly disposed inside the body 4 of the device 1 and more precisely in the damping chamber 40 located in the lower part 9b of the body 4.
  • the chamber 40 has a bottom wall 70 provided with an orifice intended for the passage of the piston rod 6 and on which the damping piece 50 is arranged.
  • the damping piece 50 likewise comprises an internal bore intended for sliding piston rod 6.
  • the distribution and abutment piece 30 is arranged on the upper face 50a of the damping piece.
  • the abutment piece 30 extends laterally beyond the damping piece 50 so as to present on the periphery of its lower face the movable abutment surface 30a. Note that this stop piece is also provided with a passage orifice intended for the sliding of the piston rod.
  • the complementary bearing surface 31 is formed by a hollow profile disposed in the side walls 18a, 18b of the lower part 9b of the body 4 of the device, so that, when the device is in the active position, the surface of stop 30a is separated from said bearing surface by a height H1 called the compression height illustrated in FIGS. 3a and 4a.
  • the stopper and distribution piece 30 is advantageously made of a rigid material such as metallic materials, for example. Note, moreover, that it makes it possible to distribute over the entire section of the damping piece 50 the restoring force of the piston rod which is exerted by means of the intermediate piece 21 on said piece stop 30.
  • the damping means MA are advantageously obtained using a damping material such as a foam or a plastic material, for example, said material being intended to be compressed so as to reduce the speed of movement of the piston rod 6 and of the intermediate piece 21 when they reach the relaxed position of the device, that is to say to reduce the speed of approach of the stop piece and of distribution 30 on the bearing surface 31.
  • a damping material such as a foam or a plastic material, for example, said material being intended to be compressed so as to reduce the speed of movement of the piston rod 6 and of the intermediate piece 21 when they reach the relaxed position of the device, that is to say to reduce the speed of approach of the stop piece and of distribution 30 on the bearing surface 31.
  • the damping material has significant damping properties as well as an important capacity to prevent rebound after the shock, that is to say not to restore the energy of the shock which it absorbs immediately and brutal.
  • the damping material used is advantageously a plastic material such as a polyurethane, for example, such as ALLRANE R TR 1571 sold by the company ALLRIM and which is a two-component polyurethane which can be transformed at room temperature or such as ALLRANE R RX 1425 which is a flexible polyurethane elastomer.
  • the damping chamber 40 has a profile intended to allow compression and therefore lateral expansion of the damping piece 50.
  • the damping piece 50 and the abutment piece 30 advantageously have in a horizontal transverse plane a rectangular profile so as to be able respectively for one to compress and for the other to slide in the chamber 40 which has, in a known manner in itself a complementary transverse profile. It goes without saying that the transverse profiles of the chamber 40 and of the abutment 30 and damping 50 parts could be circular, hexagonal or other in shape, without however departing from the claimed protective field.
  • the rectangular profiles of the stopper 30 and damping pieces 50 have a length L1 which is substantially identical along a transverse axis, while the stopper piece 30 has a width L2 greater than the width L3 of the damping piece of so as to create on the periphery of its lower face the movable abutment surface 30a.
  • the movable abutment surface is not constituted by a rigid part, but by the bottom wall of the intermediate connecting part, said part coming directly to cause the compression of the damping means. It goes without saying that the damping part could be arranged on the piston rod which is movable so as to slide with it, and no longer be fixedly disposed on the bottom wall 70 of the chamber 40.
  • the height H2 of the damping piece, the height H1 over which the compression takes place, as well as the material used to produce it are determined and chosen in particular according to the different shock parameters.
  • control and connection means of the device such as the return force of the jack, the speed of movement of the piston rod and the inertia of the masses M in movement, for example, so that the docking between the movable abutment surface and the bearing surface is effected with a low impact, that is to say with a relatively low speed of the piston rod.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention concerns a clamping device (1) designed for retaining a structural part to be machined or welded, comprising a lever (2) mounted pivoting about an axis of rotation relative to a device body to be pivoted by the displacement of the piston rod (6) of an actuator with longitudinal axis (ZZ') between a first position called inactive loosening or releasing position, and a second position (B) called active clamping position, said lever (2) being coupled with the piston rod (6) end (8) via control and linking means (MC). The invention is characterised in that it comprises damping means (MA) external to the actuator (7) designed to absorb the shocks caused in the mobile control and linking parts (MC) when the piston rod (6) returns in its loosening position corresponding to the clamping lever inactive position.

Description

Perfectionnement pour dispositif de serrage du type comprenant un levier actionné par un piston Improvement for a clamping device of the type comprising a lever actuated by a piston
La présente invention concerne un dispositif de serrage comprenant un levier actionné hydrauliquement ou pneumatiquement par un piston du type de ceux utilisés pour maintenir des pièces à usiner ou à souder. Elle concerne plus particulièrement un dispositif d'amortissement équipant le dispositif de serrage.The present invention relates to a clamping device comprising a lever actuated hydraulically or pneumatically by a piston of the type used to hold parts to be machined or welded. It relates more particularly to a damping device fitted to the clamping device.
Dans le domaine industriel et plus particulièrement dans l'industrie automobile, il est nécessaire de retenir les pièces afin de pouvoir, par exemple, les usiner ou les assembler par soudage. On a recours, bien entendu, à différents dispositifs comme, par exemple, des serre-joints ou des systèmes de genouillères, manœuvres manuellement, qui présentent un certain nombre d'inconvénients. Aussi, les constructeurs ont mis au point des systèmes de serrages automatiques, qui comprennent au moins un levier actionné d'une position inactive de libération vers une position active de serrage et inversement, par le déplacement d'un piston pouvant être commandé pneumatiquement ou hydrauliquement.In the industrial field and more particularly in the automobile industry, it is necessary to retain the parts in order to be able, for example, to machine them or to assemble them by welding. Of course, various devices are used, such as, for example, clamps or toggle systems, which are operated manually, which have a certain number of drawbacks. Also, manufacturers have developed automatic clamping systems, which include at least one lever actuated from an inactive release position to an active clamping position and vice versa, by the displacement of a piston which can be controlled pneumatically or hydraulically. .
On connaît de nombreux dispositifs de serrage du type comportant un vérin commandant le pivotement d'un bras de levier par l'intermédiaire d'une biellette de liaison ou de plusieurs biellettes, notamment les dispositifs de serrage décrits dans les demandes de brevets français publiées FR-A-2 340 798 et FR- A-2 536 323.Many clamping devices are known of the type comprising a jack controlling the pivoting of a lever arm by means of a connecting rod or of several rods, in particular the clamping devices described in the French patent applications published FR -A-2 340 798 and FR- A-2 536 323.
Le document FR-A-2 183 689 révèle un tel dispositif de serrage comprenant une butée, réglable axialement, afin de limiter la course du piston du vérin. La fonction de cette butée est d'assurer un positionnement précis de l'étrier.Document FR-A-2 183 689 discloses such a tightening device comprising a stop, axially adjustable, in order to limit the stroke of the piston of the jack. The function of this stop is to ensure precise positioning of the stirrup.
Ces dispositifs de serrage de l'art antérieur présentent cependant certains inconvénients qui altèrent leurs performances et notamment des problèmes liés aux chocs occasionnés sur et par les pièces en mouvement desdits dispositifs et qui provoquent une usure et un vieillissement des dispositifs de serrage en eux-mêmes. De ce fait, la durée de vie de ces dispositifs de serrage se trouve réduite. De plus, ces chocs entraînent des nuisances au niveau sonore désagréables qui s'ajoutent aux différents bruits de la chaîne de montage sur laquelle sont disposés les dispositifs de serrage.These clamping devices of the prior art, however, have certain drawbacks which impair their performance and in particular problems linked to shocks caused on and by the moving parts of said devices and which cause wear and aging of the clamping devices themselves. . As a result, the service life of these clamping devices is scaled down. In addition, these shocks cause unpleasant noise disturbances which are added to the various noises of the assembly line on which the clamping devices are arranged.
Le document DE-U-295 19 232 décrit un dispositif de serrage ayant un levier à genouillère comprenant un dispositif d'amortissement. Cette fonction est obtenue par étranglement du fluide qui actionne le piston. Du fait de l'incompressibilité de ce fluide, ce dispositif nécessite une course de freinage relativement longue. Ceci induit une diminution de la vitesse de positionnement du levier ainsi qu'une augmentation de la taille du vérin. Un autre inconvénient d'un tel dispositif est que le système d'amortissement étant placé dans le corps du vérin, il n'est pas possible d'utiliser des vérins standard qui sont économiquement plus avantageux.Document DE-U-295 19 232 describes a clamping device having a toggle lever comprising a damping device. This function is obtained by throttling the fluid which actuates the piston. Due to the incompressibility of this fluid, this device requires a relatively long braking stroke. This induces a decrease in the positioning speed of the lever as well as an increase in the size of the jack. Another disadvantage of such a device is that the damping system being placed in the body of the jack, it is not possible to use standard jacks which are economically more advantageous.
Ainsi, la présente invention a pour objectif de remédier aux inconvénients précités des dispositifs de serrage grâce à des moyens simples, fiables, peu onéreux et qui permettent notamment d'augmenter sensiblement la vitesse de positionnement du levier en position de détente, la durée de vie du dispositif de serrage, tout en réduisant les nuisances auditives qu'il engendre lors de son fonctionnement. Il permet, de plus, d'éviter une usure prématurée du dispositif de serrage proprement dit et du vérin commandant le dispositif ou de sa tige de piston. Ces objectifs étant atteints avec une grande précision dans le positionnement du levier en position de détente.Thus, the present invention aims to remedy the aforementioned drawbacks of clamping devices by means of simple, reliable, inexpensive and which in particular allow to significantly increase the speed of positioning of the lever in the released position, the life of the clamping device, while reducing the noise nuisance it generates during its operation. It also makes it possible to avoid premature wear of the tightening device itself and of the jack controlling the device or of its piston rod. These objectives being achieved with great precision in the positioning of the lever in the released position.
Selon sa caractéristique principale, le dispositif de serrage selon l'invention, destiné à retenir une pièce de construction à usiner ou à souder est du type comprenant un levier monté pivotant autour d'un axe de rotation par rapport à un corps de dispositif pour être actionné en pivotement par le déplacement de la tige de piston d'un vérin d'axe longitudinal entre une première position dite position inactive de libération ou position de détente, et une deuxième position dite position active de serrage, ledit levier étant relié à l'extrémité de la tige de piston par l'intermédiaire de moyens de commande et de liaison, et est caractérisé en ce qu'il comporte des moyens d'amortissement extérieurs au vérin destinés à amortir les chocs occasionnés dans les pièces mobiles des moyens de commande et de liaison lorsque la tige de piston revient dans sa position de détente qui correspond à la position inactive du levier de serrage.According to its main characteristic, the clamping device according to the invention, intended to retain a construction part to be machined or welded is of the type comprising a lever mounted pivoting about an axis of rotation relative to a device body to be pivotally actuated by the displacement of the piston rod of a cylinder with a longitudinal axis between a first position called inactive release position or detent position, and a second position called active clamping position, said lever being connected to the end of the piston rod by means of control and connection means, and is characterized in that it comprises damping means external to the jack intended to absorb the shocks caused in the moving parts of the control and connection means when the piston rod returns to its detent position which corresponds to the inactive position of the clamping lever.
Selon une autre caractéristique, la tige de piston, une pièce intermédiaire de liaison ou une pièce de butée et de répartition solidaire en déplacement de ladite tige au moins lorsque celle-ci se déplace à proximité de sa position de détente présente une surface de butée destinée à venir en butée sur une surface d'appui complémentaire solidaire du corps du dispositif ou du vérin lorsque ledit vérin est en position de détente.According to another characteristic, the piston rod, an intermediate connecting piece or an abutment and distribution piece integral in movement with said rod at least when the latter moves close to its relaxed position has an abutment surface intended to come into abutment on a complementary bearing surface integral with the body of the device or of the jack when said jack is in the released position.
Dans un mode de réalisation, les moyens d'amortissement comprennent au moins une pièce d'amortissement destinée à être comprimée lors de l'accostage de la surface de butée sur la surface d'appui.In one embodiment, the damping means comprise at least one damping piece intended to be compressed when the abutment surface lands on the bearing surface.
Dans un mode de réalisation, la pièce d'amortissement est disposée de manière fixe dans une chambre d'amortissement située dans la partie inférieure du corps du dispositif.In one embodiment, the damping piece is fixedly arranged in a damping chamber located in the lower part of the body of the device.
Selon une variante d'exécution, la surface de butée comprend une pièce de butée et de répartition disposée au-dessus de la pièce d'amortissement du dispositif.According to an alternative embodiment, the abutment surface comprises an abutment and distribution part arranged above the damping part of the device.
Selon cette variante d'exécution du dispositif de serrage, la pièce d'amortissement et la pièce de répartition et de butée présentent chacune dans un plan transversal une section de forme rectangulaire de longueur sensiblement identique, la largeur de la pièce de butée étant supérieure à la largeur de la pièce d'amortissement de manière à ce que ladite pièce de butée présente latéralement sur la périphérie de sa face inférieure la surface de butée mobile.According to this alternative embodiment of the clamping device, the damping piece and the distribution and stop piece each have in a transverse plane a rectangular section of substantially identical length, the width of the stop piece being greater than the width of the damping piece so that said abutment piece has laterally on the periphery of its lower face the movable abutment surface.
Selon un mode de réalisation du dispositif de serrage, la surface d'appui complémentaire comprend au moins un profil en creux disposé sur la ou les paroi(s) latérale(s) d'une chambre d'amortissement formant la partie inférieure du corps du dispositif. Dans un mode de réalisation, les moyens d'amortissement sont réalisés à l'aide d'un matériau d'amortissement tel qu'une mousse ou une matière plastique.According to one embodiment of the clamping device, the complementary bearing surface comprises at least one hollow profile disposed on the side wall (s) of a damping chamber forming the lower part of the body of the device. In one embodiment, the damping means are produced using a damping material such as foam or plastic.
Selon une caractéristique complémentaire, le matériau d'amortissement présente une capacité anti rebond importante, c'est-à-dire une capacité à empêcher le rebond après le choc.According to an additional characteristic, the damping material has a significant anti-rebound capacity, that is to say a capacity to prevent rebound after the impact.
Selon un mode d'exécution, le matériau d'amortissement est un polyuréthanne souple.According to one embodiment, the damping material is a flexible polyurethane.
D'autres caractéristiques et avantages de l'invention se dégageront de la description qui va suivre en regard des dessins annexés qui ne sont donnés qu'à titre d'exemples non limitatifs.Other characteristics and advantages of the invention will emerge from the description which follows with reference to the appended drawings which are given only by way of nonlimiting examples.
Les figures 1 et 2 illustrent schématiquement en vue latérale un dispositif de serrage susceptible de comporter des moyens d'amortissement MA, respectivement en positions passive et active.Figures 1 and 2 schematically illustrate in side view a clamping device capable of comprising damping means MA, respectively in passive and active positions.
La figure 3a illustre en coupe longitudinale un mode de réalisation du dispositif dans sa position active.FIG. 3a illustrates in longitudinal section an embodiment of the device in its active position.
La figure 3b illustre dans une vue similaire à la figure 3a le dispositif en position intermédiaire.Figure 3b illustrates in a view similar to Figure 3a the device in the intermediate position.
La figure 3c représente dans une vue similaire à la figure 3a le dispositif de serrage en position passive ou position de détente.Figure 3c shows in a view similar to Figure 3a the clamping device in passive position or relaxation position.
La figure 4a représente en coupe transversale le dispositif de serrage en position active.Figure 4a shows in cross section the clamping device in the active position.
La figure 4b illustre dans une vue similaire à la figure 4a le dispositif de serrage en position intermédiaire.Figure 4b illustrates in a view similar to Figure 4a the clamping device in the intermediate position.
La figure 4c illustre dans une vue similaire à la figure 4a le dispositif de serrage en position passive. Le dispositif de serrage 1 comprend un levier de serrage portant la référence générale 2 monté pivotant autour d'un axe transversal de rotation 3 sur un corps de dispositif 4, permettant audit levier d'être mobile entre deux positions, une première position A, dite position inactive de libération de la pièce à souder ou à usiner, et une deuxième position B, dite position active de serrage, comme le montrent respectivement les figures 1 et 2. Le levier de serrage 2 est actionné en pivotement autour de son axe 3 par le déplacement de la tige de piston 6 d'un vérin 7 d'axe longitudinal ZZ' par l'intermédiaire de moyens de commande et de liaison MC comme, par exemple, un ensemble d'axes de pivotement et de biellettes de liaison.Figure 4c illustrates in a view similar to Figure 4a the clamping device in the passive position. The clamping device 1 comprises a clamping lever bearing the general reference 2 mounted pivoting about a transverse axis of rotation 3 on a device body 4, allowing said lever to be movable between two positions, a first position A, called inactive position for releasing the part to be welded or machined, and a second position B, called the active clamping position, as shown in FIGS. 1 and 2. The clamping lever 2 is pivotally actuated around its axis 3 by the displacement of the piston rod 6 of a cylinder 7 with a longitudinal axis ZZ ′ by means of control and connection means MC such as, for example, a set of pivot axes and connecting rods.
Le dispositif de serrage 1 est muni de moyens d'amortissement MA, lesdits moyens d'amortissement étant destinés à amortir les chocs occasionnés lors de l'accostage des différentes pièces mobiles du dispositif, notamment lorsque le levier de serrage 2 se positionne dans une de ses positions extrêmes.The clamping device 1 is provided with damping means MA, said damping means being intended to absorb the shocks caused during the docking of the various moving parts of the device, in particular when the clamping lever 2 is positioned in one of its extreme positions.
Dans un mode de réalisation, les moyens d'amortissement MA sont avantageusement destinés à amortir les chocs occasionnés par la tige de piston 6 du vérin 7 lorsqu'elle passe vers sa position passive ou position de détente, c'est-à-dire vers sa position qui correspond à la position inactive du levier de serrage du dispositif.In one embodiment, the damping means MA are advantageously intended to absorb the shocks caused by the piston rod 6 of the jack 7 when it passes to its passive position or detent position, that is to say towards its position which corresponds to the inactive position of the device clamping lever.
Selon un des modes de réalisation du dispositif de serrage 1 sur lequel peuvent être disposés les moyens d'amortissement MA, illustré notamment sur les figures 3a à 4c, la tige de piston 6 porte à son extrémité supérieure 8 une pièce intermédiaire de liaison 21 sur laquelle est articulée au moins une biellette de liaison 16 autour d'un axe de pivotement principal 22.According to one of the embodiments of the clamping device 1 on which the damping means MA can be arranged, illustrated in particular in FIGS. 3a to 4c, the piston rod 6 carries at its upper end 8 an intermediate connecting piece 21 on which is articulated at least one connecting rod 16 around a main pivot axis 22.
La biellette de liaison 16 est articulée à son autre extrémité sur le levier de serrage 2 et plus particulièrement sur la partie d'encastrement 13 proprement dite du levier de serrage 2 autour d'un axe secondaire de pivotement 23 de manière à constituer les moyens de commande et de liaison MC du dispositif. Selon ce mode de réalisation, le corps 4 du dispositif de serrage 1 comprend une partie supérieure 9a à l'intérieur de laquelle pivote le levier de serrage 2, et une partie inférieure 9b dans laquelle coulisse la tige de piston 6 du vérin 7. Notons que le dispositif de serrage 1 comporte des moyens de fixation dudit vérin, de manière à permettre l'adaptation audit dispositif de plusieurs types de vérin, ainsi que le remplacement aisé d'un vérin défectueux.The connecting rod 16 is articulated at its other end on the clamping lever 2 and more particularly on the embedding part 13 proper of the clamping lever 2 around a secondary pivot axis 23 so as to constitute the means of control and MC connection of the device. According to this embodiment, the body 4 of the clamping device 1 comprises an upper part 9a inside which pivots the clamping lever 2, and a lower part 9b in which the piston rod 6 of the jack slides. that the clamping device 1 comprises means for fixing said cylinder, so as to allow adaptation to said device of several types of cylinder, as well as the easy replacement of a defective cylinder.
La partie supérieure 9a du corps 4 du dispositif de serrage a la forme générale d'une chape 10 qui est formée par deux parois latérales parallèles 10a, 10b créant entre elles une fente 11 destinée au passage du levier 2, lesdites parois latérales parallèles 10a, 10b, sont par ailleurs, percées d'un trou transversal d'axe XX' dans lequel est engagé l'axe transversal de rotation 3 du levier 2, comme le montrent les figures 4a, 4b et 4c. Notons que les moyens de commande MC proprement dits du dispositif sont disposés dans la partie supérieure 9a du corps 4.The upper part 9a of the body 4 of the clamping device has the general shape of a yoke 10 which is formed by two parallel side walls 10a, 10b creating between them a slot 11 intended for the passage of the lever 2, said parallel side walls 10a, 10b, are also pierced with a transverse hole of axis XX 'in which is engaged the transverse axis of rotation 3 of the lever 2, as shown in Figures 4a, 4b and 4c. Note that the control means MC proper of the device are arranged in the upper part 9a of the body 4.
Ledit levier 2 comporte un bras de levier 14 prolongeant une partie d'encastrement 13 qui constitue sa partie d'actionnement et de pivotement sur lequel est montée pivotante la biellette de liaison 16 des moyens de commande et de liaison MC.Said lever 2 comprises a lever arm 14 extending an embedding part 13 which constitutes its actuation and pivoting part on which the connecting rod 16 of the control and connecting means MC is pivotally mounted.
La partie inférieure 9b du corps 4 forme une première chambre 17 fermée, à l'intérieur de laquelle coulisse la tige de piston 6 du dispositif de serrage 1. Notons qu'elle forme également une deuxième chambre 40, dite chambre d'amortissement, disposée juste au-dessus du vérin 7 à l'intérieur de laquelle sont disposés les moyens d'amortissement MA. La partie inférieure 9b du corps 4 est ainsi constituée de deux parois latérales 18a, 18b prolongeant respectivement les deux parois latérales parallèles 10a, 10b de la chape 10 ainsi que d'une paroi arrière 19 et d'une paroi avant 20, la paroi arrière s'étendant avantageusement jusqu'à la fente 11 de la chape 10.The lower part 9b of the body 4 forms a first closed chamber 17, inside which slides the piston rod 6 of the clamping device 1. Note that it also forms a second chamber 40, called the damping chamber, arranged just above the cylinder 7 inside which are arranged the damping means MA. The lower part 9b of the body 4 thus consists of two side walls 18a, 18b respectively extending the two parallel side walls 10a, 10b of the yoke 10 as well as a rear wall 19 and a front wall 20, the rear wall advantageously extending to the slot 11 of the yoke 10.
La partie inférieure 9b du dispositif de serrage 1 est montée directement sur un vérin 7 pneumatique ou hydraulique d'axe longitudinal ZZ' dont l'extrémité 8 de la tige de piston 6 est destinée à se déplacer sensiblement verticalement entre une position de détente A, illustrée figures 1 , 3c et 4c, correspondant à la position inactive du levier 2 et une position dite de verrouillage B, illustrée figures 2, 3a et 4a, où le levier se trouve dans sa position active de serrage.The lower part 9b of the clamping device 1 is mounted directly on a pneumatic or hydraulic cylinder 7 with a longitudinal axis ZZ ′, the end 8 of the piston rod 6 of which is intended to move substantially vertically between an expansion position A, illustrated in Figures 1, 3c and 4c, corresponding to the inactive position of the lever 2 and a so-called locking position B, illustrated in FIGS. 2, 3a and 4a, where the lever is in its active clamping position.
La pièce intermédiaire de liaison 21 comprend une paroi d'extrémité 21c et une paroi verticale 21a. Ladite paroi verticale porte transversalement à son extrémité supérieure l'axe principal de pivotement 22 sur lequel est montée la biellette de liaison 16 qui peut être constituée par une double biellette 16a, 16b, comme le montrent les figures 4a à 4c. Ledit axe 22 est muni à chacune de ses extrémités d'un galet ou roulement d'extrémité 24a, 24b, destiné à être guidé dans son déplacement sensiblement vertical par des moyens de guidage MG tels que des gorges longitudinales ou des lumières borgnes situées sur les parois latérales 10a, 10b, 18a, 18b du corps 4 du dispositif de serrage 1.The intermediate connecting piece 21 comprises an end wall 21c and a vertical wall 21a. Said vertical wall carries transversely at its upper end the main pivot axis 22 on which is mounted the connecting rod 16 which can be constituted by a double rod 16a, 16b, as shown in Figures 4a to 4c. Said axis 22 is provided at each of its ends with a roller or end bearing 24a, 24b, intended to be guided in its substantially vertical movement by MG guide means such as longitudinal grooves or blind lights located on the side walls 10a, 10b, 18a, 18b of the body 4 of the clamping device 1.
Notons que les biellettes de liaison 16a, 16b sont montées à une de leurs extrémités autour de la paroi verticale 21a de la pièce intermédiaire 21 et à l'autre de leurs extrémités autour de la partie d'encastrement 13 du levier 2. Le dispositif comporte ainsi deux biellettes de liaison parallèles disposées de part et d'autre de la pièce coulissante et de la partie d'encastrement du levier. Il va de soi que les biellettes 16a, 16b et leur axe 22 pourraient être montés directement sur l'extrémité de la tige de piston, par exemple. De même, le dispositif pourrait comporter une billette unique ou plusieurs biellettes articulées entre elles.Note that the connecting rods 16a, 16b are mounted at one of their ends around the vertical wall 21a of the intermediate piece 21 and at the other of their ends around the embedding part 13 of the lever 2. The device comprises thus two parallel connecting rods arranged on either side of the sliding part and the embedding part of the lever. It goes without saying that the links 16a, 16b and their axis 22 could be mounted directly on the end of the piston rod, for example. Likewise, the device could comprise a single billet or several connecting rods hinged together.
Dans les dispositifs de serrage traditionnels, la pièce intermédiaire de liaison 21 ou la tige de piston 6 présente une surface de butée mobile destinée à venir se positionner en appui sur une surface d'appui complémentaire solidaire du corps 4 du dispositif, lorsque celui-ci est en position inactive ou position de détente.In traditional clamping devices, the intermediate connecting piece 21 or the piston rod 6 has a movable abutment surface intended to come to rest on a complementary bearing surface integral with the body 4 of the device, when the latter is in the inactive or detent position.
Selon un mode de réalisation du dispositif de serrage 1 , celui-ci comporte une surface de butée mobile 30a destinée à venir en appui sur une surface d'appui complémentaire 31 du corps 4, ladite surface de butée étant disposée sur une pièce de répartition et de butée 30 solidaire en mouvement de la tige de piston 6 lorsque celle-ci se déplace à proximité de sa position de détente, tel qu'il sera décrit ultérieurement. Les moyens d'amortissement MA sont disposés de manière à amortir l'accostage entre la surface de butée mobile 30a et la surface d'appui complémentaire 31 , ledit accostage s'effectuant ainsi avec une vitesse réduite par rapport aux dispositifs de serrage traditionnels de manière à limiter les chocs ou à absorber une bonne partie de ceux-ci et en donnant une position précise au levier par limitation de sa course.According to one embodiment of the clamping device 1, the latter comprises a movable abutment surface 30a intended to come to bear on a complementary bearing surface 31 of the body 4, said abutment surface being disposed on a distribution piece and stop 30 integral in movement with the piston rod 6 when the latter moves close to its relaxed position, as will be described later. The damping means MA are arranged so as to damp the docking between the movable abutment surface 30a and the complementary bearing surface 31, said docking being thus carried out with a reduced speed compared to traditional clamping devices so to limit the shocks or to absorb a good part of them and by giving a precise position to the lever by limiting its stroke.
Les moyens d'amortissement MA comprennent une pièce d'amortissement 50 disposée de manière fixe à l'intérieur du corps 4 du dispositif 1 et plus précisément dans la chambre d'amortissement 40 située dans la partie inférieure 9b du corps 4. La chambre 40 comporte une paroi inférieure 70 munie d'un orifice destiné au passage de la tige de piston 6 et sur laquelle est disposée la pièce d'amortissement 50. Notons que la pièce d'amortissement 50 comporte, de même, un alésage interne destiné au coulissement de la tige de piston 6.The damping means MA comprise a damping piece 50 fixedly disposed inside the body 4 of the device 1 and more precisely in the damping chamber 40 located in the lower part 9b of the body 4. The chamber 40 has a bottom wall 70 provided with an orifice intended for the passage of the piston rod 6 and on which the damping piece 50 is arranged. It should be noted that the damping piece 50 likewise comprises an internal bore intended for sliding piston rod 6.
Selon ce mode de réalisation, la pièce de répartition et de butée 30 est disposée sur la face supérieure 50a de la pièce d'amortissement.According to this embodiment, the distribution and abutment piece 30 is arranged on the upper face 50a of the damping piece.
La pièce de butée 30 s'étend latéralement au-delà de la pièce d'amortissement 50 de manière à présenter sur la périphérie de sa face inférieure la surface de butée mobile 30a. Notons que cette pièce de butée est également munie d'un orifice de passage destiné au coulissement de la tige de piston.The abutment piece 30 extends laterally beyond the damping piece 50 so as to present on the periphery of its lower face the movable abutment surface 30a. Note that this stop piece is also provided with a passage orifice intended for the sliding of the piston rod.
La surface d'appui complémentaire 31 est formée par un profil en creux disposé dans les parois latérales 18a, 18b de la partie inférieure 9b du corps 4 du dispositif, de manière à ce que, lorsque le dispositif est en position active, la surface de butée 30a soit séparée de ladite surface d'appui d'une hauteur H1 appelée hauteur de compression illustrée figures 3a et 4a.The complementary bearing surface 31 is formed by a hollow profile disposed in the side walls 18a, 18b of the lower part 9b of the body 4 of the device, so that, when the device is in the active position, the surface of stop 30a is separated from said bearing surface by a height H1 called the compression height illustrated in FIGS. 3a and 4a.
Ainsi, selon le mode de réalisation décrit et comme le montrent respectivement les figures 3a, 3b, 3c, 4a, 4b, 4c, lorsque le dispositif de serrage 1 passe de sa position de serrage B vers sa position de détente A, le retrait de la tige de piston déplace la pièce de liaison intermédiaire 21 qui vient accoster sur la face supérieure 30b de la pièce de butée 30, comme le montrent les figures 3b et 4b. La pièce de butée 30 devient ainsi solidaire en déplacement de la pièce intermédiaire 21 et de la tige de piston 6, ce sous ensemble se déplaçant en comprimant la pièce d'amortissement sur la hauteur de compression H1 jusqu'à ce que la pièce de butée 30 vienne en appui sur la surface d'appui complémentaires 31 du corps, le dispositif 1 se trouvant alors en position de détente, comme le montrent les figures 3c et 4c. La pièce de butée et de répartition 30 est avantageusement réalisée dans un matériau rigide tel que les matériaux métalliques, par exemple. Notons, de plus, qu'elle permet de répartir sur l'ensemble de la section de la pièce d'amortissement 50 la force de rappel de la tige de piston qui s'exerce par l'intermédiaire de la pièce intermédiaire 21 sur ladite pièce de butée 30.Thus, according to the embodiment described and as shown respectively in FIGS. 3a, 3b, 3c, 4a, 4b, 4c, when the clamping device 1 passes from its clamping position B towards its relaxation position A, the withdrawal of the piston rod moves the intermediate connecting piece 21 which comes to land on the upper face 30b of the stop piece 30, as shown in FIGS. 3b and 4b. The stop piece 30 thus becomes integral in displacement with the intermediate piece 21 and with the piston rod 6, this sub-assembly moving by compressing the damping piece over the compression height H1 until the stop piece 30 comes to bear on the complementary bearing surface 31 of the body, the device 1 then being in the relaxed position, as shown in FIGS. 3c and 4c. The stopper and distribution piece 30 is advantageously made of a rigid material such as metallic materials, for example. Note, moreover, that it makes it possible to distribute over the entire section of the damping piece 50 the restoring force of the piston rod which is exerted by means of the intermediate piece 21 on said piece stop 30.
Les moyens d'amortissement MA sont avantageusement obtenus à l'aide d'un matériau d'amortissement tel qu'une mousse ou une matière plastique, par exemple, ledit matériau étant destiné à être comprimé de manière à réduire la vitesse du déplacement de la tige de piston 6 et de la pièce intermédiaire 21 lorsqu'elles atteignent la position de détente du dispositif, c'est-à-dire à réduire la vitesse d'accostage de la pièce de butée et de répartition 30 sur la surface d'appui 31.The damping means MA are advantageously obtained using a damping material such as a foam or a plastic material, for example, said material being intended to be compressed so as to reduce the speed of movement of the piston rod 6 and of the intermediate piece 21 when they reach the relaxed position of the device, that is to say to reduce the speed of approach of the stop piece and of distribution 30 on the bearing surface 31.
Le matériau d'amortissement présente des propriétés d'amortissement importantes ainsi qu'une importante capacité à empêcher le rebond après le choc, c'est-à-dire à ne pas restituer l'énergie du choc qu'il absorbe de manière immédiate et brutale. Le matériau d'amortissement utilisé est avantageusement un matériau plastique tel qu'un polyuréthanne, par exemple, comme l'ALLRANER TR 1571 commercialisé par la société ALLRIM et qui est un polyuréthanne bicomposant transformable à température ambiante ou comme l'ALLRANER RX 1425 qui est un élastomère polyuréthanne souple.The damping material has significant damping properties as well as an important capacity to prevent rebound after the shock, that is to say not to restore the energy of the shock which it absorbs immediately and brutal. The damping material used is advantageously a plastic material such as a polyurethane, for example, such as ALLRANE R TR 1571 sold by the company ALLRIM and which is a two-component polyurethane which can be transformed at room temperature or such as ALLRANE R RX 1425 which is a flexible polyurethane elastomer.
Notons que la chambre d'amortissement 40 comporte un profil destiné à permettre la compression et donc l'expansion latérale de la pièce d'amortissement 50. La pièce d'amortissement 50 et la pièce de butée 30 présentent avantageusement dans un plan transversal horizontal un profil rectangulaire de manière à pouvoir respectivement pour l'une se comprimer et pour l'autre coulisser dans la chambre 40 qui possède de manière connue en soi un profil transversal complémentaire. Il va de soi que les profils transversaux de la chambre 40 et des pièces de butée 30 et d'amortissement 50 pourraient être de forme circulaire, hexagonale ou autre, sans pour autant sortir du champ de protection revendiqué. Notons également que les profils rectangulaires des pièces de butée 30 et d'amortissement 50 possèdent une longueur L1 sensiblement identique selon un axe transversal, tandis que la pièce de butée 30 présente une largeur L2 supérieure à la largeur L3 de la pièce d'amortissement de manière à créer sur la périphérie de sa face inférieure la surface de butée mobile 30a.Note that the damping chamber 40 has a profile intended to allow compression and therefore lateral expansion of the damping piece 50. The damping piece 50 and the abutment piece 30 advantageously have in a horizontal transverse plane a rectangular profile so as to be able respectively for one to compress and for the other to slide in the chamber 40 which has, in a known manner in itself a complementary transverse profile. It goes without saying that the transverse profiles of the chamber 40 and of the abutment 30 and damping 50 parts could be circular, hexagonal or other in shape, without however departing from the claimed protective field. Note also that the rectangular profiles of the stopper 30 and damping pieces 50 have a length L1 which is substantially identical along a transverse axis, while the stopper piece 30 has a width L2 greater than the width L3 of the damping piece of so as to create on the periphery of its lower face the movable abutment surface 30a.
Il est important de noter que le déplacement de la pièce de butée 30 sur la hauteur de compression H1 s'effectue lors du retrait de la tige de piston sous l'action de la force de rappel du vérin et surtout des forces d'inertie dues aux différentes masses en mouvement M qui lui sont transmises par la pièce intermédiaire de liaison 21. Lorsque la tige de piston quitte sa position de détente pour revenir vers sa position active, la pièce 30 est ramenée dans sa position initiale par l'expansion de la pièce d'amortissement 50 qui revient dans sa position initiale, ce déplacement s'effectuant en accompagnant le déplacement de la tige de piston 6 sur la hauteur de compression H1 , la tige poursuivant ensuite son déplacement avec la pièce de liaison tandis que la pièce de butée et de répartition 30 reste disposée sur la face supérieure 50a de la pièce d'amortissement 50.It is important to note that the displacement of the abutment piece 30 over the compression height H1 takes place during the withdrawal of the piston rod under the action of the return force of the jack and especially of the inertial forces due to the various moving masses M which are transmitted to it by the intermediate connecting part 21. When the piston rod leaves its detent position to return to its active position, the part 30 is returned to its initial position by the expansion of the damping part 50 which returns to its initial position, this displacement being effected by accompanying the displacement of the piston rod 6 over the compression height H1, the rod then continuing its displacement with the connecting part while the part stop and distribution 30 remains disposed on the upper face 50a of the damping part 50.
Selon une variante non représentée, la surface de butée mobile n'est pas constituée par une pièce rigide, mais par la paroi inférieure de la pièce intermédiaire de liaison, ladite pièce venant directement provoquer la compression des moyens d'amortissement. Il va de soi que la pièce d'amortissement pourrait être disposée sur la tige de piston qui est mobile de manière à coulisser avec elle, et non plus être disposée de manière fixe sur la paroi inférieure 70 de la chambre 40.According to a variant not shown, the movable abutment surface is not constituted by a rigid part, but by the bottom wall of the intermediate connecting part, said part coming directly to cause the compression of the damping means. It goes without saying that the damping part could be arranged on the piston rod which is movable so as to slide with it, and no longer be fixedly disposed on the bottom wall 70 of the chamber 40.
Selon un mode de réalisation du dispositif de serrage, la hauteur H2 de la pièce d'amortissement, la hauteur H1 sur laquelle s'effectue la compression ainsi que le matériau utilisé pour la réaliser sont déterminés et choisis notamment en fonction des différents paramètres du choc, liés au déplacement du vérin, et des moyens de commande et de liaison du dispositif, comme la force de rappel du vérin, la vitesse de déplacement de la tige de piston et l'inertie des masses M en mouvement, par exemple, de manière à ce que l'accostage entre la surface de butée mobile et la surface d'appui s'effectue avec un choc faible, c'est-à-dire avec une vitesse relativement faible de la tige de piston. According to one embodiment of the clamping device, the height H2 of the damping piece, the height H1 over which the compression takes place, as well as the material used to produce it, are determined and chosen in particular according to the different shock parameters. , linked to the displacement of the jack, and control and connection means of the device, such as the return force of the jack, the speed of movement of the piston rod and the inertia of the masses M in movement, for example, so that the docking between the movable abutment surface and the bearing surface is effected with a low impact, that is to say with a relatively low speed of the piston rod.

Claims

REVENDICATIONS
1. Dispositif de serrage (1) destiné à retenir une pièce de construction à usiner ou à souder, du type comprenant un levier (2) monté pivotant autour d'un axe de rotation (XX', 3) par rapport à un corps de dispositif (4) pour être actionné en pivotement par le déplacement de la tige de piston (6) d'un vérin1. Clamping device (1) intended to retain a construction part to be machined or welded, of the type comprising a lever (2) mounted to pivot about an axis of rotation (XX ', 3) relative to a body of device (4) for being pivotally actuated by the displacement of the piston rod (6) of a jack
(7) d'axe longitudinal (ZZ') entre une première position (A) dite position inactive de libération ou position de détente, et une deuxième position (B) dite position active de serrage, ledit levier (2) étant relié à l'extrémité (8) de la tige de piston (6) par l'intermédiaire de moyens de commande et de liaison (MC), caractérisé en ce qu'il comporte des moyens d'amortissement(7) of longitudinal axis (ZZ ') between a first position (A) called inactive release position or detent position, and a second position (B) called active clamping position, said lever (2) being connected to the end (8) of the piston rod (6) by means of control and connection means (MC), characterized in that it comprises damping means
(MA) extérieurs au vérin (7) destinés à amortir les chocs occasionnés dans les pièces mobiles des moyens de commande et de liaison (MC) lorsque la tige de piston (6) revient dans sa position de détente (A) qui correspond à la position inactive du levier de serrage.(MA) external to the jack (7) intended to absorb the shocks caused in the moving parts of the control and connection means (MC) when the piston rod (6) returns to its detent position (A) which corresponds to the inactive position of the clamping lever.
2. Dispositif de serrage (1 ) selon la revendication 1 , caractérisé en ce que la tige de piston (6), une pièce intermédiaire de liaison (21 ) ou une pièce de butée et de répartition (30), solidaire en déplacement de ladite tige au moins lorsque celle-ci se déplace à proximité de sa position de détente, présente une surface de butée (30a) destinée à venir en butée sur une surface d'appui complémentaire (31 ) solidaire du corps du dispositif (4) ou du vérin (7) lorsque ledit vérin est en position de détente.2. Clamping device (1) according to claim 1, characterized in that the piston rod (6), an intermediate connecting piece (21) or a stop and distribution piece (30), integral in displacement with said rod at least when the latter moves close to its relaxed position, has an abutment surface (30a) intended to abut on a complementary bearing surface (31) integral with the body of the device (4) or of the cylinder (7) when said cylinder is in the released position.
3. Dispositif de serrage (1 ) selon la revendication 2, caractérisé en ce que les moyens d'amortissement (MA) comprennent au moins une pièce d'amortissement (50) destinée à être comprimée lors de l'accostage de la surface de butée (30a) sur la surface d'appui (31).3. Clamping device (1) according to claim 2, characterized in that the damping means (MA) comprise at least one damping piece (50) intended to be compressed during docking of the abutment surface (30a) on the bearing surface (31).
4. Dispositif de serrage (1 ) selon la revendication 3, caractérisé en ce que la pièce d'amortissement (50) est disposée de manière fixe dans une chambre d'amortissement (40) située dans la partie inférieure (9b) du corps du dispositif (4). 4. Clamping device (1) according to claim 3, characterized in that the damping part (50) is fixedly disposed in a damping chamber (40) located in the lower part (9b) of the body of the device (4).
5. Dispositif de serrage (1) selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que la surface de butée (30a) comprend une pièce de butée et de répartition (30) disposée au-dessus de la pièce d'amortissement (50) du dispositif.5. Clamping device (1) according to any one of claims 3 or 4, characterized in that the abutment surface (30a) comprises an abutment and distribution piece (30) disposed above the workpiece damping (50) of the device.
6. Dispositif de serrage (1) selon la revendication 5 caractérisé en ce que la pièce d'amortissement (50) et la pièce de répartition et de butée (30) présentent dans un plan transversal une section de forme rectangulaire de longueur (L1) sensiblement identique, la largeur (L2) de la pièce de butée (30) étant supérieure à la largeur (L3) de la pièce d'amortissement (50) de manière à ce que ladite pièce de butée (30) présente latéralement sur la périphérie de sa face inférieure (30a) la surface de butée mobile.6. Clamping device (1) according to claim 5 characterized in that the damping part (50) and the distribution and abutment part (30) have in a transverse plane a rectangular section of length (L1) substantially identical, the width (L2) of the stop piece (30) being greater than the width (L3) of the damping piece (50) so that said stop piece (30) has laterally on the periphery from its lower face (30a) the movable stop surface.
7. Dispositif de serrage (1) selon l'une quelconque des revendications 2 à 6, caractérisé en ce que la surface d'appui complémentaire comprend au moins un profil en creux (31) disposé sur la ou les paroi(s) latérale(s) (18a, 18b) d'une chambre d'amortissement (40) formant la partie inférieure (9b) du corps du dispositif (4).7. Clamping device (1) according to any one of claims 2 to 6, characterized in that the complementary bearing surface comprises at least one hollow profile (31) disposed on the side wall (s) (s) ( s) (18a, 18b) of a damping chamber (40) forming the lower part (9b) of the body of the device (4).
8. Dispositif de serrage (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens d'amortissement (MA) sont réalisés à l'aide d'un matériau d'amortissement.8. Clamping device (1) according to any one of the preceding claims, characterized in that the damping means (MA) are produced using a damping material.
9. Dispositif de serrage (1 ) selon la revendications 8, caractérisé en ce que le matériau d'amortissement présente une capacité anti rebond importante, c'est-à-dire une capacité à empêcher le rebond après le choc.9. Clamping device (1) according to claim 8, characterized in that the damping material has a significant anti-rebound capacity, that is to say an ability to prevent rebound after the impact.
10. Dispositif de serrage (1 ) selon l'une quelconque des revendications 8 et 9, caractérisé en ce que le matériau d'amortissement est tel qu'une mousse ou une matière plastique.10. Clamping device (1) according to any one of claims 8 and 9, characterized in that the damping material is such as a foam or a plastic material.
11. Dispositif de serrage (1) selon la revendication 10, caractérisé en ce que le matériau d'amortissement est un polyuréthanne souple. 11. Clamping device (1) according to claim 10, characterized in that the damping material is a flexible polyurethane.
EP98951545A 1997-10-24 1998-10-23 Improvement for clamping device comprising a lever actuated by a piston Withdrawn EP1024926A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9713596 1997-10-24
FR9713596A FR2770167B1 (en) 1997-10-24 1997-10-24 IMPROVEMENT FOR A TIGHTENING DEVICE OF THE TYPE INCLUDING A PISTON-OPERATED LEVER
PCT/FR1998/002276 WO1999021684A1 (en) 1997-10-24 1998-10-23 Improvement for clamping device comprising a lever actuated by a piston

Publications (1)

Publication Number Publication Date
EP1024926A1 true EP1024926A1 (en) 2000-08-09

Family

ID=9512808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98951545A Withdrawn EP1024926A1 (en) 1997-10-24 1998-10-23 Improvement for clamping device comprising a lever actuated by a piston

Country Status (5)

Country Link
EP (1) EP1024926A1 (en)
AU (1) AU9751698A (en)
BR (1) BR9815218A (en)
FR (1) FR2770167B1 (en)
WO (1) WO1999021684A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0308170D0 (en) 2003-04-09 2003-05-14 Rolls Royce Plc A mounting arrangement and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2222686B2 (en) * 1972-05-09 1980-06-12 Tuenkers Maschinenbau Gmbh, 4030 Ratingen Pressure medium-operated toggle lever clamping device, in particular for body parts
FR2340798A1 (en) * 1976-02-13 1977-09-09 Polymatic Sa IRREVERSIBLE CLAMP HEAD WITH FLOATING HITCH AND QUICK DISASSEMBLY
DE3242788C2 (en) * 1982-11-19 1985-02-07 Tünkers Maschinenbau GmbH, 4030 Ratingen Pressurized toggle lever clamping device
DE29519232U1 (en) * 1995-12-05 1996-04-04 Tünkers Maschinenbau GmbH, 40880 Ratingen Toggle clamp device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9921684A1 *

Also Published As

Publication number Publication date
BR9815218A (en) 2000-10-31
FR2770167B1 (en) 1999-12-24
AU9751698A (en) 1999-05-17
FR2770167A1 (en) 1999-04-30
WO1999021684A1 (en) 1999-05-06

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