EP0505282B1 - Spring compressor, specially for arched springs - Google Patents
Spring compressor, specially for arched springs Download PDFInfo
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- EP0505282B1 EP0505282B1 EP19920400756 EP92400756A EP0505282B1 EP 0505282 B1 EP0505282 B1 EP 0505282B1 EP 19920400756 EP19920400756 EP 19920400756 EP 92400756 A EP92400756 A EP 92400756A EP 0505282 B1 EP0505282 B1 EP 0505282B1
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- Prior art keywords
- spring
- jaws
- jaw
- springs
- spring compressor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
- B25B27/302—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs coil springs other than torsion coil springs
- B25B27/304—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs coil springs other than torsion coil springs by compressing coil springs
Definitions
- the present invention relates to a spring compressor used as a tool for mounting or dismounting the springs of shock absorbers of a motor vehicle.
- the present invention intends to propose a spring compressor which makes it possible to grasp the springs curved from the outside, and as simple as for cylindrical springs, and which gives the possibility of gripping a cylindrical spring as close as possible to the cups.
- the subject of the invention is a spring compressor, in particular a suspension compressor for a motor vehicle, comprising a motor device and two jaws each having an active part in the shape of a horseshoe and an attachment part for its connection to the motor device. , external to the active part, in which the axis of the motor device coupled to the jaws is outside the median plane of division in two branches of the active part of each jaw.
- this arrangement allows each jaw to be placed so that its partition plane is substantially coincident with the bending plane of the spring.
- the jaws are thus located at the point where the turns are the most spaced from each other while the motor member of the compressor can be located outside this plane, that is to say, for example, in front of the plane of bending of the spring, where generally there is space available on the vehicle.
- the advantage of this arrangement consists in being able to achieve maximum compression of the spring by bringing the external part of the turns, compression which can continue even if the internal part of the turns has become contiguous, leading to a straightening of the curvature of the spring.
- the angular offset around the axis between the wire-cup contact points at the end of each spring will have been determined for each particular spring.
- the plan for sharing a jaw coupled to the compressor engine member is offset from the other's partition plane by substantially the same value as that of the contact point offset.
- This offset between the jaw sharing planes (or cups) and the axis of the actuating cylinder can be obtained in several ways.
- One of them consists in interposing between the jack and each cup an intermediate adaptation piece, so that standard cups can be used which have their attachment part in the partition plane of the cup.
- This embodiment is only of interest if there is sufficient space near the convex generator of the spring for the passage of this attachment part, which is not negligible in size.
- Another way is to make special cups or jaws in which the attachment part is outside this partition plane, for example secured to one of the branches of the active part.
- the bottom of the horseshoe is of minimal size and it is located where, between the external generator of a curved spring and the structure of the vehicle, there is only a small free space.
- attachment part in a third embodiment, provision has been made for the attachment part to be movable relative to the active part. Fixing means are provided between them to fix them in one or more possible relative positions. This embodiment makes it possible to adjust the position of the jaws to that of the spring / shock absorber cup contact points.
- Figure 1 very schematically shows an arm 1 of a vehicle wheel of which only the hub 2 is shown, provided with a shock absorber 3 and a spring 4, coupled between the arm and a structural part 5 of the vehicle (a bell 6 for receiving the spring for example).
- the spring 4 is bent in a plane substantially transverse to the vehicle and the space available on the convex side of this spring is generally very small and does not allow a common spring compressor to be installed.
- FIGs 2 and 3 illustrate the spring compressor according to the invention adapted to the compression of a curved spring.
- This compressor comprises a drive member and two jaws 8 and 9 which are detachably coupled to the drive member (jack) 7.
- Each jaw has an active part 10 which is in the general shape of a horseshoe or semi-annular track. This active part is intended to overlap approximately a half-turn of the spring as shown in FIG. 3, and for this the bearing surface which it presents opposite this turn is of helical shape.
- the pitch of this propeller is chosen as explained below.
- Each jaw also includes an attachment part 11 to the motor member 7 which is integral with the active part but oriented relative to the latter so that the axis 7 a of this motor member 7 is outside the plane P partitioning the active part 10 into two branches 10 a and 10 b .
- the means making it possible to obtain this offset are carried by the jaws themselves in the form of a connecting lug in one piece with the active and attachment parts.
- An alternative embodiment has not been shown which would use a conventional jaw, that is to say a jaw in which the partition plane of the active part is also the plane of symmetry of the attachment part, and a part connecting the actuator 7 to this jaw, which can act as a mutual articulation lever for the parts. This bulky arrangement is not the best embodiment of the invention.
- the compression of the convex part of the spring is not hampered by the contact between the turns at the concave part.
- the turns rotate around these internal contacts and the continuation of the compression generates a straightening of the spring.
- a propeller pitch for the track of the active parts of each jaw, less than that of the turns at the level of the convex part of the spring. It is understood that thus the jaw-spring contact is made at the start of compression, in the middle part of the lower jaw and on the tips of the branches of the upper jaw.
- the spring crushing and straightening, each turn in engagement tends to rest on the entire track of each jaw and at the end of compression, the spring is perfectly held in the jaws.
- advantages of the invention lie in the fact that the same jaws can be used for dismantling the left and right springs of a motor vehicle (the figures relate only to the left spring for example).
- the part 11 comprises a mortise M in which is housed a tenon T of the part 10.
- the mortise M and the tenon T are of annular shape and means 12 for mutual fixing of the two parts 10 and 11 (for example pins, bolts, etc.) are provided to secure the two parts in one of several configurations. determined possible.
- This embodiment may include variants, for example by articulation of an arm carrying the attachment part on the active part.
- the invention also covers a tool in which the two jaws are offset symmetrically with respect to the fixing part (which can be obtained in an adjustable manner with the variant of FIG. 4).
- the invention also includes another embodiment not shown in which the active part of the jaw is articulated to the attachment part around an axis substantially orthogonal to the axis 7 a of the jack.
- This articulated jaw makes it possible to have practically flat cups whose inclination around this axis of articulation constitutes a means of adaptation of the active part to the propeller of the turn of the engaged spring.
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Description
La présente invention concerne un compresseur de ressorts utilisé comme outil pour le montage ou le démontage des ressorts d'amortisseurs de véhicule automobile.The present invention relates to a spring compressor used as a tool for mounting or dismounting the springs of shock absorbers of a motor vehicle.
La structure générale de ce genre d'appareils est bien connue : il s'agit de deux mâchoires destinées à chevaucher pour l'une, une spire inférieure et l'autre, une spire supérieure du ressort, attelées entre elles par un vérin qui les rapproche ou les éloigne pour comprimer ou décomprimer le ressort, cf. par exemple FR-A-2 421 034.The general structure of this type of device is well known: they are two jaws intended to overlap for one, a lower turn and the other, an upper turn of the spring, coupled together by a jack which brings them together or away to compress or decompress the spring, cf. for example FR-A-2 421 034.
La plupart des ressorts à manipuler avec cet appareil sont rectilignes et de ce fait peuvent être saisis par l'appareil dans une position quelconque autour du ressort, sous réserve de l'encombrement de l'environnement du ressort.Most of the springs to be used with this device are rectilinear and therefore can be gripped by the device in any position around the spring, subject to the size of the spring environment.
D'autres ressorts sont cintrés. C'est notamment le cas des ressorts de suspension de bras de roue séparés de l'amortisseur qui est disposé à l'extérieur du ressort. Les dispositifs utilisés dans ce cas sont spécifiques puisque le vérin est logé à l'intérieur du ressort et est attelé au centre de deux coupelles formant mâchoires.Other springs are bent. This is particularly the case for the wheel arm suspension springs separate from the shock absorber which is arranged outside the spring. The devices used in this case are specific since the cylinder is housed inside the spring and is coupled to the center of two cups forming jaws.
On comprend que ce matériel spécifique différent du matériel standard de prise du ressort par l'extérieur est un inconvénient pour le garagiste qui doit posséder plusieurs outils.It is understood that this specific material different from the standard material for taking the spring from the outside is a disadvantage for the mechanic who must have several tools.
Le démontage de ce type de ressorts cintrés par des appareils à mâchoires manoeuvrés par l'extérieur est tout à fait malcommode du fait que l'environnement de ces ressorts est très encombré et notamment du côté de sa convexité.The disassembly of this type of springs bent by jaws devices operated from the outside is quite inconvenient because the environment of these springs is very crowded and especially on the side of its convexity.
Par ailleurs, il convient de pouvoir placer les mâchoires du compresseur au plus près des coupelles de suspension dans lesquelles sont logées les extrémités du ressort. C'est rarement possible avec les appareils classiques.Furthermore, it should be possible to place the jaws of the compressor as close as possible to the suspension cups in which the ends of the spring are housed. This is rarely possible with conventional devices.
La présente invention entend proposer un compresseur de ressorts qui permette de saisir les ressorts cintrés par l'extérieur, et ce de manière aussi simple que pour les ressorts cylindriques, et qui donne la possibilité de saisir un ressort cylindrique au plus près des coupelles.The present invention intends to propose a spring compressor which makes it possible to grasp the springs curved from the outside, and as simple as for cylindrical springs, and which gives the possibility of gripping a cylindrical spring as close as possible to the cups.
A cet effet, l'invention a pour objet un compressseur de ressorts notamment de suspension pour véhicule automobile comportant un dispositif moteur et deux mâchoires ayant chacune une partie active en forme de fer à cheval et une partie d'attachement pour sa liaison au dispositif moteur, extérieure à la partie active, dans lequel l'axe du dispositif moteur attelé aux mâchoires est à l'extérieur du plan médian de partage en deux branches de la partie active de chaque mâchoire.To this end, the subject of the invention is a spring compressor, in particular a suspension compressor for a motor vehicle, comprising a motor device and two jaws each having an active part in the shape of a horseshoe and an attachment part for its connection to the motor device. , external to the active part, in which the axis of the motor device coupled to the jaws is outside the median plane of division in two branches of the active part of each jaw.
Dans le cas des ressort cintrés, cette disposition permet de placer chaque mâchoire de manière que son plan de partage soit sensiblement confondu avec le plan de cintrage du ressort. Les mâchoires sont ainsi situées à l'endroit où les spires sont le plus écartées les unes des autres tandis que l'organe moteur du compresseur peut être situé en dehors de ce plan c'est à dire, par exemple, en avant du plan de cintrage du ressort, où généralement il existe un espace disponible sur le véhicule. L'avantage de cet arrangement consiste à pouvoir réaliser une compression maximale du ressort en rapprochant la partie externe des spires, compression qui peut se poursuivre même si la partie interne des spires est devenue jointive, conduisant à un redressement de la courbure du ressort.In the case of curved springs, this arrangement allows each jaw to be placed so that its partition plane is substantially coincident with the bending plane of the spring. The jaws are thus located at the point where the turns are the most spaced from each other while the motor member of the compressor can be located outside this plane, that is to say, for example, in front of the plane of bending of the spring, where generally there is space available on the vehicle. The advantage of this arrangement consists in being able to achieve maximum compression of the spring by bringing the external part of the turns, compression which can continue even if the internal part of the turns has become contiguous, leading to a straightening of the curvature of the spring.
Pour pouvoir placer les mâchoires au plus près des coupelles d'extrémité de l'amortisseur, on aura déterminé pour chaque ressort particulier le décalage angulaire autour de l'axe entre les points de contact fil-coupelle à l'extrémité de chaque ressort. Avec ce renseignement, il est possible de décaler angulairement les deux mâchoires d'une valeur fonction de ce décalage de sorte que l'une des extrémités du fer à cheval de chaque mâchoire puisse être glissée au plus près du point de contact ressort-coupelle correspondant. Dans ce cas le plan de partage d'une mâchoire attelée à l'organe moteur du compresseur est décalé par rapport au plan de partage de l'autre de sensiblement la même valeur que celle du décalage des points de contact.To be able to place the jaws as close as possible to the end cups of the shock absorber, the angular offset around the axis between the wire-cup contact points at the end of each spring will have been determined for each particular spring. With this information, it is possible to angularly offset the two jaws by a value depending on this offset so that one of the horseshoe ends of each jaw can be slid as close as possible to the corresponding spring-cup contact point. . In this case the plan for sharing a jaw coupled to the compressor engine member is offset from the other's partition plane by substantially the same value as that of the contact point offset.
Ce décalage entre les plans de partage des mâchoires (ou coupelles) et l'axe du vérin d'actionnement peut être obtenu de plusieurs manières.This offset between the jaw sharing planes (or cups) and the axis of the actuating cylinder can be obtained in several ways.
L'une d'elles consiste à interposer entre le vérin et chaque coupelle une pièce d'adaptation intermédiaire, de manière à pouvoir utiliser des coupelles standard qui possèdent leur partie d'attachement dans le plan de partage de la coupelle. Cette réalisation n'offre d'intérêt que s'il existe un espace suffisant à proximité de la génératrice convexe du ressort pour le passage de cette partie d'attachement, qui n'est pas d'encombrement négligeable.One of them consists in interposing between the jack and each cup an intermediate adaptation piece, so that standard cups can be used which have their attachment part in the partition plane of the cup. This embodiment is only of interest if there is sufficient space near the convex generator of the spring for the passage of this attachment part, which is not negligible in size.
Une autre manière consiste à réaliser des coupelles ou mâchoires spéciales dans lesquelles la partie d'attachement est à l'extérieur de ce plan de partage, par exemple solidaire de l'une des branches de la partie active. Dans ce cas le fond du fer à cheval est d'encombrement minimal et il se trouve à l'endroit où, entre la génératrice extérieure d'un ressort cintré et la structure du véhicule, il n'existe qu'un faible espace libre.Another way is to make special cups or jaws in which the attachment part is outside this partition plane, for example secured to one of the branches of the active part. In this case the bottom of the horseshoe is of minimal size and it is located where, between the external generator of a curved spring and the structure of the vehicle, there is only a small free space.
Dans une troisième réalisation, on a prévu que la partie d'attachement soit mobile par rapport à la partie active. Des moyens de fixation sont prévus entre elles pour les fixer dans une ou plusieurs positions relatives possibles. Ce mode de réalisation permet d'ajuster la position des mâchoires à celle des points de contact ressort/coupelle d'amortisseur.In a third embodiment, provision has been made for the attachment part to be movable relative to the active part. Fixing means are provided between them to fix them in one or more possible relative positions. This embodiment makes it possible to adjust the position of the jaws to that of the spring / shock absorber cup contact points.
L'invention sera mieux comprise au cours de la description donnée ci-après d'un exemple de réalisation qui permettra d'en dégager les avantages et les caractéristiques secondaires.The invention will be better understood during the description given below of an exemplary embodiment which will make it possible to identify the advantages and the secondary characteristics thereof.
Il sera fait référence aux dessins annexés dans lesquels :
- la figure 1 est un schéma illustrant la disposition d'un ressort à manipuler,
- la figure 2 est un schéma d'un appareil conforme à l'invention,
- la figure 3 est un schéma d'une vue de dessus de la figure 2,
- la figure 4 est un schéma d'une variante de réalisation de la mâchoire.
- FIG. 1 is a diagram illustrating the arrangement of a spring to be manipulated,
- FIG. 2 is a diagram of an apparatus according to the invention,
- FIG. 3 is a diagram of a top view of FIG. 2,
- Figure 4 is a diagram of an alternative embodiment of the jaw.
La figure 1, très schématiquement représente un bras 1 de roue de véhicule dont seul le moyeu 2 est représenté, pourvu d'un amortisseur 3 et d'un ressort 4, attelés entre le bras et une pièce de structure 5 du véhicule (une cloche 6 de réception du ressort par exemple).Figure 1, very schematically shows an arm 1 of a vehicle wheel of which only the
Le ressort 4 est cintré dans un plan sensiblement transversal au véhicule et l'espace disponible du côté convexe de ce ressort est en général très réduit et ne permet pas d'installer un compresseur de ressort commun.The
Les figures 2 et 3 illustrent le compresseur de ressort selon l'invention adapté à la compression d'un ressort cintré. Ce compresseur comporte un organe moteur et deux mâchoires 8 et 9 attelées de manière démontable à l'organe moteur (vérin) 7. Chaque mâchoire comporte une partie active 10 qui est en forme générale de fer à cheval ou de piste semi-annulaire. Cette partie active est destinée à chevaucher environ une demi-spire du ressort comme représenté en figure 3, et pour cela la surface d'appui qu'elle présente en regard de cette spire est de forme hélicoïdale. Le pas de cette hélice est choisi comme expliqué ci-après.Figures 2 and 3 illustrate the spring compressor according to the invention adapted to the compression of a curved spring. This compressor comprises a drive member and two jaws 8 and 9 which are detachably coupled to the drive member (jack) 7. Each jaw has an
Chaque mâchoire comporte également une partie d'attachement 11 à l'organe moteur 7 qui est solidaire de la partie active mais orientée par rapport à cette dernière de manière que l'axe 7a de cet organe moteur 7 soit à l'extérieur du plan P de partage de la partie active 10 en deux branches 10a et 10b. Dans le cas de la figure 3, les moyens permettant d'obtenir ce décalage sont portés par les mâchoires elles-mêmes sous forme d'une patte de liaison en une seule pièce avec les parties active et d'attachement. On n'a pas représenté une variante de réalisation qui mettrait en oeuvre une mâchoire classique, c'est à dire une mâchoire dans laquelle le plan de partage de la partie active est également plan de symétrie de la partie d'attachement, et une pièce de liaison du vérin 7 à cette mâchoire, pouvant faire levier d'articulation mutuelle des pièces. Cette disposition encombrante n'est pas le meilleur mode de réalisation de l'invention.Each jaw also includes an
Ce décalage, comme on le voit sur les figures, permet de placer les mâchoires sur la partie extérieure des spires, c'est à dire là où elles sont le plus écartées, bien qu'à cet endroit il n'y ait pas la place de loger le vérin. Le vérin 7 se trouve ramené par exemple sur l'avant du ressort qui est suffisamment dégagé, et où il est accessible pour sa manoeuvre. L'avantage du placement des mâchoires dans la partie convexe du ressort réside dans un plus grand pouvoir de compression de l'appareil. En effet, si la partie des spires chevauchée par les mâchoires est celle par exemple visible sur la figure 2, les spires seraient comprimées sensiblement parallèlement à elles-mêmes. Aussi, dès qu'elles deviennent jointives à l'intérieur de la courbure, la compression devient impossible. En outre, dans cette hypothèse qui permettrait l'utilisation d'un compresseur connu, l'espace entre spires pour loger la mâchoire est très petit à l'intérieur de la courbure du ressort et inférieur à l'épaisseur de la partie active des mâchoires, ce qui rend la mise en place du compresseur difficile voire impossible dans certains cas.This offset, as can be seen in the figures, makes it possible to place the jaws on the outside of the turns, that is to say where they are most apart, although at this point there is no room to house the cylinder. The
Grâce à l'invention, la compression de la partie convexe du ressort n'est pas entravée par le contact entre les spires au niveau de la partie concave. Les spires pivotent autour de ces contacts intérieurs et la poursuite de la compression engendre un redressement du ressort. Pour que cette opération se fasse dans les meilleures conditions, notamment du point de vue de la sécurité, on aura choisi un pas d'hélice, pour la piste des parties actives de chaque mâchoire, inférieur à celui moyen des spires au niveau de la partie convexe du ressort. On comprend qu'ainsi le contact mâchoire-ressort est réalisé au début de la compression, dans la partie médiane de la mâchoire inférieure et sur la pointe des branches de la mâchoire supérieure. Au cours de la compression le ressort s'écrasant et se redressant, chaque spire en prise tend à reposer sur toute la piste de chaque mâchoire et en fin de compression, le ressort est parfaitement tenu dans les mâchoires.Thanks to the invention, the compression of the convex part of the spring is not hampered by the contact between the turns at the concave part. The turns rotate around these internal contacts and the continuation of the compression generates a straightening of the spring. So that this operation is carried out under the best conditions, in particular from the point of view of safety, we will have chosen a propeller pitch, for the track of the active parts of each jaw, less than that of the turns at the level of the convex part of the spring. It is understood that thus the jaw-spring contact is made at the start of compression, in the middle part of the lower jaw and on the tips of the branches of the upper jaw. During compression, the spring crushing and straightening, each turn in engagement tends to rest on the entire track of each jaw and at the end of compression, the spring is perfectly held in the jaws.
En outre, des avantages de l'invention résident dans le fait que les mêmes mâchoires peuvent servir pour le démontage des ressorts gauche et droit d'un véhicule automobile (les figures ne concernent que le ressort gauche par exemple).In addition, advantages of the invention lie in the fact that the same jaws can be used for dismantling the left and right springs of a motor vehicle (the figures relate only to the left spring for example).
En effet, on a constaté qu'en fait la courbure ou le cintre des ressorts n'est pas un cercle mais varie du fait de l'orientation dans l'espace des surfaces d'appui des extrémités des ressorts. Il s'ensuit que l'inclinaison A du "plan moyen" de la demi-spire frontale inférieure en prise avec l'appareil sur l'axe du vérin est différente de celle (B) de la demi-spire supérieure.Indeed, it has been found that in fact the curvature or the arch of the springs is not a circle but varies due to the orientation in space of the bearing surfaces of the ends of the springs. It follows that the inclination A of the "mean plane" of the lower front half-turn engaged with the device on the axis of the jack is different from that (B) of the upper half-turn.
Cette non symétrie rend nécessaire la provision d'un jeu de mâchoires pour ressorts de gauche et un jeu de mâchoires pour ressorts de droite, si on veut utiliser frontalement des compresseurs classiques. Dans le cas de l'invention en revanche cette absence de symétrie peut être compensée du fait qu'il existe un certain degré de liberté de chaque mâchoire entre les spires du ressort. Ainsi on peut choisir une inclinaison moyenne de chaque mâchoire sur l'axe du vérin qui convient pour manipuler les deux ressorts, en ayant retourné le vérin pour passer de l'un à l'autre ou en ayant inversé les mâchoires attelées au vérin. Deux mâchoires suffisent donc pour agir sur les ressorts gauche et droit.This non-symmetry makes it necessary to provide a set of jaws for left springs and a set of jaws for right springs, if conventional compressors are to be used frontally. In the case of the invention, on the other hand, this lack of symmetry can be compensated for by the fact that there is a certain degree of freedom of each jaw between the turns of the spring. Thus one can choose an average inclination of each jaw on the axis of the cylinder which is suitable for manipulating the two springs, having turned the cylinder to pass from one to the other or having inverted the jaws coupled to the cylinder. Two jaws therefore sufficient to act on the left and right springs.
La figure 4 illustre une variante de réalisation d'une mâchoire dans laquelle la partie d'attachement 11 est déplaçable par rapport à la partie active 10, le décalage de l'axe 7a du vérin par rapport au plan de partage P de la partie active étant de ce fait réglable. A cette fin, la partie 11 comporte une mortaise M dans laquelle est logé un tenon T de la partie 10.4 illustrates an alternative embodiment of a jaw in which the
La mortaise M et le tenon T sont de forme annulaire et des moyens 12 de fixation mutuelle des deux parties 10 et 11 (par exemple des goupilles, des boulons...) sont prévus pour solidariser les deux parties dans l'une de plusieurs configurations déterminées possibles. Cette réalisation peut comporter des variantes, par exemple par articulation d'un bras portant la partie d'attachement sur la partie active.The mortise M and the tenon T are of annular shape and means 12 for mutual fixing of the two
L'invention couvre également un outil dans lequel les deux mâchoires seraient décalées de manière symétrique par rapport à la partie de fixation (ce que l'on peut obtenir de manière réglable avec la variante de la figure 4). On comprend que de cette manière on peut décaler angulairement l'une par rapport à l'autre autour de l'axe d'un ressort cylindrique les surfaces d'emprise de chaque coupelle ce qui permet de pouvoir les glisser entre la première et la dernière spire du ressort et les coupelles de l'amortisseur, au plus près des points de contact fil/coupelle, en prenant en compte le décalage angulaire qui existe entre ces deux points de contact autour de l'axe du ressort.The invention also covers a tool in which the two jaws are offset symmetrically with respect to the fixing part (which can be obtained in an adjustable manner with the variant of FIG. 4). We understand that in this way we can angularly offset one relative to the other around the axis of a cylindrical spring the grip surfaces of each cup which allows to be able to slide between the first and the last turn of the spring and the shock absorber cups, as close as possible to the wire / cup contact points, taking into account the angular offset that exists between these two contact points around the axis of the spring.
Il est ainsi possible d'embrasser, entre les mâchoires du compresseur une partie importante du ressort donc de diminuer les inconvénients (allongement) dûs à la détente des extrémités des ressorts non comprises entre les mâchoires lors de la compression.It is thus possible to embrace, between the jaws of the compressor a large part of the spring therefore to reduce the drawbacks (elongation) due to the relaxation of the ends of the springs not included between the jaws during compression.
L'invention comprend également un autre mode de réalisation non représenté dans lequel la partie active de la mâchoire est articulée à la partie d'attachement autour d'un axe sensiblement orthogonal à l'axe 7a du vérin. Cette mâchoire articulée permet de disposer de coupelles pratiquement planes dont l'inclinaison autour de cet axe d'articulation constitue un moyen d'adaptation de la partie active à l'hélice de la spire du ressort en prise.The invention also includes another embodiment not shown in which the active part of the jaw is articulated to the attachment part around an axis substantially orthogonal to the
Claims (4)
- A spring compressor for springs (4) in particular of a suspension for a motor vehicle comprising a drive device (7) and two jaws (8, 9) each having a horseshoe-shaped active portion (10) and an attachment portion (11) for connection thereof to the drive device (7), said attachment portion being external to the active portion, characterised in that the axis (7a) of the drive device (7) which is coupled to the jaws (8, 9) is to the outside of the central plane (P) of division into two arms (10a, 10b) of the active portion (10) of each jaw (8, 9).
- A spring compressor according to claim 1 characterised in that the central division planes (P) of the two jaws are coincident.
- A spring compressor according to claim 1 characterised in that the central division plane of one jaw is different from that of the other jaw.
- A spring compressor according to one of the preceding claims characterised in that it comprises at least one jaw whose attachment portion (11) is movable with respect to the active portion (10), fixing means (12) being provided between them to immobilise them in at least one given relative position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9103443 | 1991-03-21 | ||
| FR9103443A FR2674167B1 (en) | 1991-03-21 | 1991-03-21 | SPRING COMPRESSOR, ESPECIALLY FOR HANGED SPRINGS. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0505282A1 EP0505282A1 (en) | 1992-09-23 |
| EP0505282B1 true EP0505282B1 (en) | 1994-09-14 |
Family
ID=9410981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19920400756 Expired - Lifetime EP0505282B1 (en) | 1991-03-21 | 1992-03-20 | Spring compressor, specially for arched springs |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0505282B1 (en) |
| DE (1) | DE69200401T2 (en) |
| FR (1) | FR2674167B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20119267U1 (en) | 2001-11-27 | 2002-02-21 | Klann Tools Ltd | Eccentric pressure plates for spring tensioners |
| JP4177669B2 (en) * | 2003-01-08 | 2008-11-05 | 本田技研工業株式会社 | Vehicle suspension system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR409792A (en) * | 1908-12-01 | 1910-04-30 | Jacinte Cerqueda | Valve lifter devices |
| US1517899A (en) * | 1922-10-12 | 1924-12-02 | Mathew J Burkel | Valve-spring-lifting device |
| FR590857A (en) * | 1924-02-21 | 1925-06-24 | Valve lifter | |
| DE2813381C2 (en) * | 1978-03-28 | 1982-12-30 | Horst 7730 Villingen-Schwenningen Klann | Compression spring tensioner |
| FR2663875B1 (en) * | 1990-07-02 | 1995-06-23 | Mecanique Energetique | DISASSEMBLY MOUNTING APPARATUS FOR SPRINGS ENGAGED IN A BLIND HOUSING. |
-
1991
- 1991-03-21 FR FR9103443A patent/FR2674167B1/en not_active Expired - Fee Related
-
1992
- 1992-03-20 DE DE1992600401 patent/DE69200401T2/en not_active Expired - Lifetime
- 1992-03-20 EP EP19920400756 patent/EP0505282B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2674167A1 (en) | 1992-09-25 |
| EP0505282A1 (en) | 1992-09-23 |
| FR2674167B1 (en) | 1995-07-28 |
| DE69200401T2 (en) | 1995-05-04 |
| DE69200401D1 (en) | 1994-10-20 |
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