EP1324840B1 - Dispositif pour redresser la carrosserie et/ou les structures d'un vehicule automobile accidente - Google Patents
Dispositif pour redresser la carrosserie et/ou les structures d'un vehicule automobile accidente Download PDFInfo
- Publication number
- EP1324840B1 EP1324840B1 EP01978520A EP01978520A EP1324840B1 EP 1324840 B1 EP1324840 B1 EP 1324840B1 EP 01978520 A EP01978520 A EP 01978520A EP 01978520 A EP01978520 A EP 01978520A EP 1324840 B1 EP1324840 B1 EP 1324840B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cylinder
- straightening
- bodywork
- structures
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/06—Means for driving the impulse member
- B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
- B25D9/125—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure driven directly by liquid pressure working with pulses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/14—Straightening frame structures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S72/00—Metal deforming
- Y10S72/705—Vehicle body or frame straightener
Definitions
- the present invention relates to a device for straightening and in particular repair the bodywork or structures of motor vehicles casualties.
- the object of the present invention is to simplify these straightening operations reconditioning, in particular by means of a portable device, capable of develop significant power.
- a portable device capable of develop significant power.
- Such a system is reversibly vehicle and steerable in such a direction, that straightening forces exert precisely in the desired direction. It is intended to allow the performing traction or pressure efforts, without long manipulations and the structures involved, and without necessarily vehicle, the mass of which is sufficient to prevent any movement of this one during the straightening action.
- the frequency of movement or striking of the piston at within the portable receiver cylinder is between 50 and 100 strokes per second.
- the organ rotative consists of a non-circular profile cam, a connecting rod associated with a crankshaft, or equivalent body. It is intended to transform a movement rotary in an alternating translational movement.
- the diameter of the portable receiver cylinder is smaller than the diameter of the cylinder transmitter.
- the increase in piston speed within the receiver cylinder is performed in the same proportion as the actual section difference.
- the emitting cylinder communicates with at least one hydraulic fluid accumulation chamber, whose accumulation volume is adjustable by means of a piston, whose stroke is limited with a threaded rod, said piston closing the access to said chamber accumulation in the absence of external stress, under the action of compressed air or a calibrated spring.
- said piston of the chamber accumulation is static and is therefore not subject to the action of compressed air or of any calibrated spring.
- Figure 1 is a schematic representation of the rotary member, in this case constituted by a cam, for illustrating the linear velocity of the emitter piston as a function of the angular coordinates of the rotary member.
- Figures 2 to 9 are schematic representations in section of the device according to the invention under different phases of operation.
- Figure 10 is a detailed schematic representation of a receiver cylinder provided with the receiver piston.
- Figure 11 is a view similar to any one of Figures 2 to 9, illustrating a second embodiment of the device according to the invention.
- the device according to the invention is therefore particularly described in relationship with Figures 2 to 9. It is made of steel.
- an EC transmitter cylinder in which moves a piston transmitter PE under the action of a rotary member.
- This is constituted in the example described by a cam C with a non-circular profile and, in particular, an ellipsoidal profile, which transforms a circular movement (the one of the cam) in a reciprocating movement of the emitter piston PE.
- This cam is driven in rotation by an electric or thermal motor (no shown) to induce movement of the piston PE in a movement of alternative translation, and one of whose ends comes to bear on the path of cam.
- This cam C induces at each beginning of the cycle the thrust of the fluid hydraulics, and oil in this case contained by the device, via of the PE transmitter piston.
- the system is filled with a hydraulic fluid including oil.
- the oil can not penetrate into the volume of rotation of the cam, the piston PE being for this purpose provided with an O-ring J1.
- This emitter cylinder communicates via a flexible conduit F with a CR portable receiver cylinder, intended to be fixed to the bodywork or to the straightening structure by any known means, and in particular by means of a part anchor.
- a receiver piston PR slides within the receiver cylinder CR, and this under the action of the oil conveyed at this level by the flexible conduit F. It is conceivable whereas, given the fact that the CE emitting cylinder and the F hose are filled with oil, this oil is transmitted through the hydraulic hose F to within the portable receiver cylinder CR by the movements of the emitter piston PE, itself powered by cam C.
- the receiving piston PR hits the rear bottom FA of the CR receiver cylinder.
- this cylinder receiver and the receiver piston have complementary shapes, such as the receiver piston is guided in its translation within the receiver cylinder.
- the latter is provided at its two respective ends with O-rings J2 and J3, and this, in known manner.
- the striking of the receiving piston on the rear background FA of the receiving cylinder generates a more or less powerful force, depending on the mass and the speed of the piston during the impact.
- the receiving piston PR is then pushed back by a calibrated spring (no shown) or a compressed gas, so that it resumes its initial position from the beginning of race, leading simultaneously to the return of the oil that had actuated it, which itself pushes the emitting piston PE always resting on the cam track, said cam C resuming its initial position.
- a calibrated spring no shown
- a compressed gas a compressed gas
- the number of cycles per second depends on the speed of rotation of the cam. The higher the number of cycles per second, the higher the frequency of keystrokes is increased, reaching almost a continuum in terms of pressure or traction exerted on the structure to straighten.
- receiver cylinder has two ends and in particular anchors respectively FP and FT depending on the nature of the action to be performed at of the structure, the end FP intended to allow the exercise of pressure, and the FT end being intended to allow the exercise of traction.
- the device comprises also means for adjusting the force generated by the striking of the piston PR receiver on the rear bottom FA CR receiver cylinder.
- the stroke of the emitter piston PE and its diameter contribute to the fact a quantity of oil is displaced, much more than the quantity of oil required to move the receiving piston PR, whose diameter is less than diameter of the PE emitter piston, which due to surface differences effective, increases in the same proportions the speed of the PR receiver piston.
- the device comprises an oil accumulation chamber A1, communicating with the transmitter cylinder CE.
- the volume of this room is adjustable by means of a threaded rod at the end of which comes to bear a piston P1, capable of moving within this chamber.
- the race of piston within the accumulation chamber A1 is adjustable.
- a zones of said chamber which can not be filled with oil, is filled compressed gas or incorporates a calibrated spring (not shown), intended to induce closing said chamber by the piston P1 in the absence of constraint exterior.
- the Threaded rod T is screwed to the maximum ( Figure 3) so as to prevent any displacement of the piston P1, and thus avoid the penetration of oil into the chamber A1.
- the rotation of the cam C generates the thrust of the emitter piston PE, which in turn immediately induces the displacement of the oil at the PR receiver piston, which thus hits the rear bottom FA of the slave cylinder according to a speed quite moderate (figure 4), since corresponding to a zone of the cam close to bottom dead point.
- the sector involved of the cam gives a weak power to the piston PE, which in turn communicates a low speed at the piston PR, and corollary a low impact force.
- the surplus oil driven by the PE emitter piston is stored in a second accumulation chamber A2, also communicating with the cylinder CE transmitter.
- this chamber A2 is also closed by a piston P2, maintained in this shutter configuration either by a calibrated spring (no represented), but with a constant greater than that of the spring acting on the P1 piston, or by a compressed gas at a pressure greater than the pressure of the compressed gas acting on the piston P1.
- the piston P2 requires a pressure of oil coming from the emitter cylinder higher than that likely to act on the piston P1 to cause its displacement in the chamber accumulation A2, and corollary, the release of a volume of accumulation temporary oil from said cylinder transmitter CE.
- the taring of the piston P2 is thus chosen so that it is greater than the force acting on the piston PR receiver by the calibrated spring or the compressed gas, so that the piston P2 can not come into action before the cylinder PR receiver piston receiver hit the rear part FA of said receiver cylinder ( Figure 5).
- the physical quantities governing the piston P2 are more higher than those governing the restoring force of the PR receiver piston, which are themselves superior to those acting on the piston P I.
- the emitting piston PE goes down again given the movement of the cam track on which it is based, and allows the accumulation chamber A2, the pressure generated by the piston P2 is very high, to empty ( Figure 6).
- the CR receiver cylinder whose calibration of its return spring, or where the pressure of the compressed gas is lower than corresponding physical quantities of the accumulation chamber A2, can then empty (Figure 7).
- the cam C has completed its cycle and found at its starting point, ready for a new cycle.
- the accumulation chamber A1 When the accumulation chamber A1 has stored a quantity of oil corresponding to a low speed of the emitter piston, itself dependent on the position of the cam (see Figure 1), the speed of the emitter piston increases because corresponding to an area of the cam path where the speed is higher, and comes push the PR receiver piston, which in turn hits the FA bottom of the CR receiver cylinder, at a higher speed than during the configuration preceding, generating a greater strike force.
- Excess oil hunted by the emitter piston PE is stored in the accumulation chamber A2, remembered that the setting of the return spring is greater or that the pressure of the compressed gas is higher.
- the emitter piston PE goes down and allows the accumulation chamber A2 to be emptied first, taking into account the characteristics of its return member (spring or compressed gas). Then intervenes the emptying of the CR receiver cylinder, for the same reasons. Finally, intervenes the draining the accumulation chamber A1, taking into account the characteristics of its reminder organ the weakest.
- the adjustment of the threaded rod T makes it possible, according to its position, to adjust very precise piston stroke P1 in the accumulation chamber A1, and therefore to accurately choose the speed of the PE transmitter piston according to the position of the cam C during the striking of the piston PR at the bottom FA of the cylinder receiver.
- the striking force can be varied in relation to with the speed of the receiver piston, depending on the one hand, the speed of rotation of the cam C, and secondly, the adjustment of the volume of the accumulation chamber A1. This is done by adjusting the accumulation chamber, through the threaded rod T, to select the striking force of the receiving piston.
- the speed of rotation of the cam C is also influenced in order to determine the power or the force of striking. This speed of rotation induces a displacement of PE transmitter piston and piston receiver PR more or less fast. As the strength as already recalled depends on the mass of the PR receiver piston, and the square of its speed, the higher the speed, the greater the striking force. This speed also affects the frequency of shocks for straightening.
- the variation of the speed of the emitter piston PE can be obtained by different means, such as an electronic speed variator motor driving the cam C in rotation, or by means of an inverter gear speed.
- piston P1 of the accumulation chamber A1 is devoid of any restoring force.
- the zone of said room not accessible to the oil does not include neither calibrated spring nor compressed gas, but freely communicates with the outside air. Said piston P1 is therefore static during operation of the device of the invention.
- this embodiment of the invention makes it possible to preserve the adjustment of the striking force of the receiving piston PR on the bottom FA of the cylinder CR receiver. Indeed, if said piston PR is positioned according to a zone relatively close to the bottom FA, because of the reduction in the available volume of the accumulation chamber A1, a small displacement of the emitter piston PE is necessary to push the receiving piston PR and strike said bottom FA.
- This weak displacement of the emitting piston PE is generated by a sector of the cam C close to the bottom dead center. In other words, according to this configuration, the sector involved with the cam C gives a low speed to the emitter piston PE, which at its the tower communicates a low speed to the receiving piston PR, and consequently a weak strike force in FA.
- the sector of the cam C involved at the moment of the impact of the piston receiver PR in FA gives a high speed to the emitter piston PE, which its turn communicates a high speed to the receiving piston PR, and consequently a major strike force in FA.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Actuator (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
- Transmission Devices (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Retarders (AREA)
- Motor Or Generator Frames (AREA)
- Braking Arrangements (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Description
- un cylindre émetteur, rempli de fluide hydraulique, dans lequel se déplace un piston émetteur sous l'action d'un organe rotatif actionné en rotation au moyen d'un moteur ;
- un cylindre récepteur portatif, connecté au cylindre émetteur au moyen d'un conduit flexible, ledit cylindre récepteur étant destiné à être relié par tout moyen à la carrosserie ou à la structure à redresser et recevant un piston se déplaçant en translation au sein dudit cylindre sous l'action du fluide hydraulique, afin de venir frapper le voisinage de l'extrémité dudit cylindre récepteur reliée à la carrosserie ou à ladite structure.
Les figures 2 à 9 sont des représentations schématiques en section du dispositif conforme à l'invention sous différentes phases de fonctionnement.
La figure 11 est une vue analogue à l'une quelconque des figures 2 à 9, illustrant une seconde forme de réalisation du dispositif conforme à l'invention.
Claims (9)
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté caractérisé en ce qu'il comporte :un cylindre émetteur (CE) rempli de fluide hydraulique, dans lequel se déplace un piston émetteur (PE) sous l'action d'un organe rotatif actionné au moyen d'un moteur ;un cylindre récepteur portatif (CR), connecté au cylindre émetteur au moyen d'un conduit flexible (F) s'étendant depuis ledit cylindre émetteur, et étant destiné à être relié par tout moyen à la carrosserie ou à la structure à redresser, ledit cylindre récepteur recevant un piston récepteur (PR), se translatant au sein du cylindre récepteur sous l'action du fluide hydraulique, afin de venir frapper le voisinage de l'extrémité (FA) dudit cylindre récepteur relié à la carrosserie ou à la structure, et étant soumis à une force de rappel tendant à le ramener à sa position d'origine.
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon la revendication 1, caractérisé en ce que la force de rappel tendant à ramener le piston récepteur (PR) à sa position d'origine est engendrée par de l'air ou du gaz comprimé ou un ressort taré.
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon l'une des revendications 1 et 2, caractérisé en ce que la fréquence de déplacement, et corollairement la fréquence des impacts générés par le piston récepteur (PR) est compris entre 50 et 100 coups par seconde.
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon la revendication 3, caractérisé en ce que la fréquence de déplacement, et corollairement la fréquence des impacts générés par le piston récepteur (PR) est accordée à la fréquence de résonance de la structure à redresser ou à l'une de ses harmoniques.
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon l'une des revendications 1 à 4, caractérisé en ce que l'organe rotatif est constitué par une came (c) à profil non circulaire ou par un vilebrequin associé à une bielle ou un dispositif équivalent, conférant au piston émetteur un mouvement de translation alternatif.
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon l'une des revendications 1 à 5, caractérisé en ce que le diamètre du cylindre récepteur est inférieur au diamètre du cylindre émetteur.
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon l'une des revendications 1 à 6, caractérisé en ce que le cylindre émetteur (CE) communique avec au moins une chambre d'accumulation (A1) du fluide hydraulique, dont le volume est ajustable par l'intermédiaire d'un piston (P1) associé à une tige filetée (T), ledit piston (P1) étant en l'absence de contrainte, maintenu en position d'obturation de ladite chambre d'accumulation par de l'air ou un gaz comprimé ou un ressort taré.
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon la revendication 7, caractérisé en ce que le cylindre émetteur (CE) communique avec une seconde chambre d'accumulation (A2) associée également à un piston (P2) maintenu, en l'absence de contrainte extérieure, en position d'obturation de la chambre d'accumulation (A2) par de l'air ou un gaz comprimé ou un ressort taré, ces grandeurs physiques étant néanmoins plus élevées que celles exerçant la force de rappel du piston récepteur (PR), elles-mêmes supérieures à celles des moyens agissant sur le piston (P1) de la chambre d'accumulation (A1).
- Dispositif pour redresser la carrosserie et les structures d'un véhicule accidenté selon l'une des revendications 1 à 6, caractérisé en ce que le cylindre émetteur (CE) communique :d'une part, avec une chambre d'accumulation (A1) du fluide hydraulique, dont le volume est ajustable par l'intermédiaire d'un piston (P1) associé à une tige filetée (T), ledit piston (P1) n'étant soumis à aucune contrainte autre que celle du fluide hydraulique susceptible de pénétrer au sein du volume qu'il définit au sein de la chambre d'accumulation (A1),et d'autre part avec une seconde chambre d'accumulation (A2) associée également à un pistor (P2) maintenu, en l'absence de contrainte extérieure, en position d'obturation de ladite chambre par de l'air ou un gaz comprimé ou un ressort taré, ces grandeurs physiques étant néanmoins plus élevées que celles exerçant la force de rappel du piston récepteur (PR).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0012975 | 2000-10-11 | ||
FR0012975A FR2815003B1 (fr) | 2000-10-11 | 2000-10-11 | Dispositif pour redresser la carrosserie et les structures d'un vehicule accidente |
PCT/FR2001/003119 WO2002030588A1 (fr) | 2000-10-11 | 2001-10-10 | Dispositif pour redresser la carrosserie et/ou les structures d"un vehicule automobile accidente |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1324840A1 EP1324840A1 (fr) | 2003-07-09 |
EP1324840B1 true EP1324840B1 (fr) | 2005-08-17 |
Family
ID=8855203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01978520A Expired - Lifetime EP1324840B1 (fr) | 2000-10-11 | 2001-10-10 | Dispositif pour redresser la carrosserie et/ou les structures d'un vehicule automobile accidente |
Country Status (8)
Country | Link |
---|---|
US (1) | US6973816B2 (fr) |
EP (1) | EP1324840B1 (fr) |
AT (1) | ATE302073T1 (fr) |
AU (1) | AU2002210627A1 (fr) |
DE (1) | DE60112778T2 (fr) |
ES (1) | ES2247174T3 (fr) |
FR (1) | FR2815003B1 (fr) |
WO (1) | WO2002030588A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022096661A1 (fr) * | 2020-11-06 | 2022-05-12 | Mincon International Limited | Dispositif de forage avec résonateur à colonne de fluide |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2260268A (en) * | 1939-03-01 | 1941-10-21 | S & W Hydraulic Tool Company | Power tool |
GB845707A (en) * | 1956-11-30 | 1960-08-24 | Sutcliffe Richard Ltd | Improvements in or relating to fluid actuated mechanisms |
SE8500747L (sv) * | 1985-02-18 | 1986-03-17 | Samefa Ab | Forfarande och anordning for riktning av en deformerad fordonskaross |
-
2000
- 2000-10-11 FR FR0012975A patent/FR2815003B1/fr not_active Expired - Fee Related
-
2001
- 2001-10-10 AU AU2002210627A patent/AU2002210627A1/en not_active Abandoned
- 2001-10-10 WO PCT/FR2001/003119 patent/WO2002030588A1/fr active IP Right Grant
- 2001-10-10 EP EP01978520A patent/EP1324840B1/fr not_active Expired - Lifetime
- 2001-10-10 DE DE60112778T patent/DE60112778T2/de not_active Expired - Lifetime
- 2001-10-10 AT AT01978520T patent/ATE302073T1/de not_active IP Right Cessation
- 2001-10-10 ES ES01978520T patent/ES2247174T3/es not_active Expired - Lifetime
-
2003
- 2003-04-09 US US10/409,816 patent/US6973816B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ATE302073T1 (de) | 2005-09-15 |
WO2002030588A1 (fr) | 2002-04-18 |
US6973816B2 (en) | 2005-12-13 |
EP1324840A1 (fr) | 2003-07-09 |
FR2815003B1 (fr) | 2003-01-31 |
US20040000185A1 (en) | 2004-01-01 |
DE60112778D1 (de) | 2005-09-22 |
AU2002210627A1 (en) | 2002-04-22 |
FR2815003A1 (fr) | 2002-04-12 |
DE60112778T2 (de) | 2006-05-18 |
ES2247174T3 (es) | 2006-03-01 |
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