EP1825960A1 - Spring compressor - Google Patents

Spring compressor Download PDF

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Publication number
EP1825960A1
EP1825960A1 EP07290200A EP07290200A EP1825960A1 EP 1825960 A1 EP1825960 A1 EP 1825960A1 EP 07290200 A EP07290200 A EP 07290200A EP 07290200 A EP07290200 A EP 07290200A EP 1825960 A1 EP1825960 A1 EP 1825960A1
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EP
European Patent Office
Prior art keywords
cup
shoulder
countersink
cups
spring
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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.)
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EP07290200A
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German (de)
French (fr)
Inventor
Patrick Lambert
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Individual
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Individual
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Publication date
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Publication of EP1825960A1 publication Critical patent/EP1825960A1/en
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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 garage tool for mounting and dismounting of motor vehicle dampers.
  • the document FR 2 647 045 describes such a tool.
  • One of its particularities lies in the means of cooperation between a compressor body (which is a screw jack or a hydraulic cylinder) and each of the cups.
  • these means are constituted by the eyelet or split ring form of the attachment part.
  • these means comprise a cylindrical bearing which can be housed inside the split ring while a lateral projection of this bearing constitutes a key which is housed in the slot of the ring so that it forms a locking rotation of the ring on the scope.
  • This cylindrical seat is surrounded by a shoulder and a threaded portion, opposite the shoulder, which is intended to receive a clamping nut of the split ring against the shoulder.
  • This variant embodiment differs from that described in the document FR 2 647 045 by a disjunction of the two main functions provided by the cooperation of the fixing means of the cups on the body: immobilization in rotation of the cup around the axis of the body and a means of anti-tearing laterally, the latter according to this document being provided by the fact that the inner diameter of the split ring is greater than the width of the slot. A simple lateral bending of the reach by the attachment part of the cup is therefore not possible.
  • the split ring then became a hub in which a U-shaped housing, open laterally, is formed, this housing having a width equal to the diameter of a cylindrical surface provided on the body.
  • a U-shaped housing open laterally
  • One of the axial faces of the hub has also been provided with a countersink of diameter greater than the width of the housing so that the shoulder can penetrate, at least partially, in the countersink, which ensures the anti-tearing function laterally .
  • the stop in rotation is provided by a lateral projection of the shoulder which, when facing the U-shaped housing, fits axially in this housing so that the shoulder falls axially into the counterbore.
  • the body of the apparatus is intended to receive both the primitive cups and their variant (second generation).
  • the diameter of the cylindrical bearing being given, the lateral key which cooperates with the split ring is of smaller width (smaller than the diameter of the span) than the width of the lateral projection of the shoulder which is equal to the diameter of the span.
  • the invention relates to a spring compressor comprising a telescopic body with an axis and two cups, each cup having an active part and an attachment part, the body having means for receiving the part of attachment of each cup, these means comprising a cylindrical bearing with a threaded portion at one of its ends engageable with a clamping nut and a shoulder at its other end, the cylindrical bearing having a first key projecting from its outer surface, the shoulder comprising a peripheral non-circular contour, the attachment portion of each cup further comprising a split hub whose slot is of width equal to the diameter of the cylindrical bearing surface and a counterbore on one of the axial faces hub whose periphery is in correspondence of shape with the periphery of the shoulder.
  • the split hub comprises a housing formed in the surface of the slot, adapted to receive the first key to allow at least partial rotation of the cup relative to the body when the shoulder is not housed in the countersink.
  • This peculiarity of the cups makes it possible to eliminate the obstacle formed by the key to at least partial rotation of the cup around the axis of the span while it overlaps it but the shoulder is not still fallen in the counter.
  • the opposite nut of the shoulder is a support aid for the cup. He participates in his rotating temporary coupling if he cooperates with a secondary counterbeam lateral retainer, arranged on the other of the axial faces of the attachment part.
  • This possibility of rotation of the cup, while it is already attached to the body of the tool makes it easier to place on a spring of the entire compressor, that is to say the body (cylinder ) equipped with its two cups.
  • At least one of the cups can pivot for example over a quarter of a turn to be engaged between the turns of the spring in a movement similar to that of a scissors blade . It is then possible to access springs that previously required to first place the cups between the spring turns and then to fix the cups to the body of the apparatus.
  • a spring compressor body according to the invention is shown in the left part. It comprises a jack 1 having a cylinder 2 and a rod 3. This rod can move in extension or retraction relative to the cylinder 2 along an axis 4. At the end of the cylinder 2 there is a cylindrical bearing surface 5 framed by a shoulder 6 on the side of the cylinder 2 and, by a thread 7 on the side of the rod 3.
  • the bearing 5 has a lateral projection 8 which constitutes a keying element of a cup as explained in the document FR 2 647 045 .
  • the shoulder 6 also has a lateral projection 9 to the plumb with the projection 8 and whose width L is substantially equal to the diameter D of the cylindrical bearing surface 5.
  • the movable rod 3 of the cylinder 1 also has a cylindrical bearing surface 10 of the same diameter D as the aforementioned cylindrical bearing surface 5 surrounded by a shoulder 11 located at its free end and by a thread 12 opposite to the shoulder.
  • the shoulder 11 has a profile identical to the shoulder 6 with a projecting portion 13 of width L equal to the diameter D.
  • the bearing 10 has a projection 14 forming a keying element as said above while the threading 12 can cooperate with a nut 15 here in the form of a knurled ring. It is not shown in the figure the same nut intended to cooperate with the thread 7 of the cylindrical surface 5.
  • the figure also comprises the representation of a cup or jaw 20 having an active part 21 for example in the form of a helical track facing downwards in the case of the figure, and an attachment part 22 in the form of a split hub.
  • This cylindrical hub thus has a slot 23 also with a cylindrical bottom 24 whose width A is substantially equal to the diameter D of the bearing surfaces 5 and 10.
  • the hub 22 can thus ride on one or the other of these staves.
  • the hub is limited by two axial faces.
  • a countersink 25 whose periphery is identical to the periphery, here circular, of one or the other of the shoulders 6 and 11, the protruding parts 9 and 13 can be housed between the ends 25 a and 25 b of the wall of the countersink interrupted by the slot 23.
  • the other axial face of the portion 22 of attachment of the cup 20 also has a counterbore 26 in which may penetrate a cylindrical portion 15a of a nut such as 15.
  • the inner surface of the slot 23 has a housing 27 whose height and depth are such that the projections 8 and 14 of the cylindrical bearing surfaces 5 and 10 do not constitute an obstacle for the cup to rotate at least partially around said litters.
  • This rotational capacity is provided on at least 90 °.
  • the cup 20 in the position shown, is intended to be coupled to the end of the rod 3 of the cylinder.
  • the cup When this cup is returned, that is to say when the counterbore 25 is turned downwards, the cup may be associated with the cylinder 2 of the cylinder 1.
  • the counterbore 25 then caps the shoulder 6 with its projection 9 housed in the slot 23.
  • a nut cooperating with the thread 7 makes it possible to completely immobilize the cup on the cylinder 2.
  • the cup 20 can be coupled in the same manner to the end of the rod 3 by causing the shoulder 11 to fall into the counterbore 25 with the protruding part 13 into the slot 23 and this cup can be clamped in this position by means of of the nut 15.
  • the compressor spring can be approached from the spring to be disassembled, so that the cup integral with the cylinder 2 is engaged with a turn of this spring while the cup integral with the rod 3 is outside this spring. It is then sufficient to rotate this upper cup parallel to itself between the turns of a spring to be able to place it correctly with respect to this spring. In this final position, it is then possible to penetrate the shoulder 11 into the countersink 25 and continue tightening the nut until a complete fixation of the cup on the cylinder.
  • the non-circular peripheral contour of each shoulder comprises a circular portion and the protrusion (key) 9, 13.
  • any other non-circular contour of the shoulder (and counterbore 25) may be suitable, for example a square or polygonal outline.
  • the shape matching allowing the penetration of the shoulder in the countersink only allow an angular position between the cylinder and each cup so that they are always opposite each other in order to avoid a bad catch of the spring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)

Abstract

The compressor has a telescopic body with two cups (20), where each cup has active and attachment parts (21, 22). The body has a cylindrical face (5) with a threaded part at one end, where the threaded part cooperates with a screw (15) and shoulders (6, 11). The attachment part is in the form of a slotted hub including a housing (27) arranged in a surface of a slot (23). The housing receives projections (8, 14) of cylindrical faces (5, 10) for permitting partial rotation of the cups with respect to the body when one shoulder is not housed in a counter bore (25) of the part (22).

Description

La présente invention concerne un outil de garage destiné aux montage et démontage des amortisseurs de véhicules automobiles.The present invention relates to a garage tool for mounting and dismounting of motor vehicle dampers.

ARRIERE PLAN DE L'INVENTIONBACKGROUND OF THE INVENTION

Le document FR 2 647 045 décrit un tel outil. L'une de ses particularités réside dans les moyens de coopération entre un corps de compresseur (qui est un vérin à vis ou un vérin hydraulique) et chacune des coupelles. Sur les coupelles (qui comprennent une partie de travail et une partie d'attachement) ces moyens sont constitués par la forme en oeillet ou en bague fendue de la partie d'attachement. Sur le corps de l'appareil, ces moyens comprennent une portée cylindrique qui peut se loger à l'intérieur de la bague fendue tandis qu'une saillie latérale de cette portée constitue une clavette qui se loge dans la fente de la bague de sorte qu'elle forme un blocage en rotation de la bague sur la portée. Cette portée cylindrique est encadrée par un épaulement et par une partie filetée, opposée à l'épaulement, qui est destinée à recevoir un écrou de serrage de la bague fendue contre l'épaulement.The document FR 2 647 045 describes such a tool. One of its particularities lies in the means of cooperation between a compressor body (which is a screw jack or a hydraulic cylinder) and each of the cups. On the cups (which comprise a working part and an attachment part) these means are constituted by the eyelet or split ring form of the attachment part. On the body of the apparatus, these means comprise a cylindrical bearing which can be housed inside the split ring while a lateral projection of this bearing constitutes a key which is housed in the slot of the ring so that it forms a locking rotation of the ring on the scope. This cylindrical seat is surrounded by a shoulder and a threaded portion, opposite the shoulder, which is intended to receive a clamping nut of the split ring against the shoulder.

Il s'agit là d'une première version de cet appareil qui a subi une évolution ayant donné lieu à une variante de réalisation. Cette variante de réalisation diffère de celle décrite dans le document FR 2 647 045 par une disjonction des deux fonctions principales assurées par la coopération des moyens de fixation des coupelles sur le corps : une immobilisation en rotation de la coupelle autour de l'axe du corps et un moyen anti arrachement latéral, ce dernier selon ce document étant assuré par le fait que le diamètre intérieur de la bague fendue est supérieur à la largeur de la fente. Un enfourchement latéral simple de la portée par la partie d'attachement de la coupelle n'est de ce fait pas possible.This is a first version of this device that has undergone an evolution that gave rise to an alternative embodiment. This variant embodiment differs from that described in the document FR 2 647 045 by a disjunction of the two main functions provided by the cooperation of the fixing means of the cups on the body: immobilization in rotation of the cup around the axis of the body and a means of anti-tearing laterally, the latter according to this document being provided by the fact that the inner diameter of the split ring is greater than the width of the slot. A simple lateral bending of the reach by the attachment part of the cup is therefore not possible.

Or, dans certains véhicules, cet enfourchement est rendu nécessaire du fait de conditions difficiles pour accéder au ressort. La bague fendue est alors devenue un moyeu dans lequel un logement en U, ouvert latéralement, est ménagé, ce logement étant de largeur égale au diamètre d'une portée cylindrique prévue sur le corps. L'une des faces axiales du moyeu a été également pourvue d'un lamage de diamètre supérieur à la largeur du logement de sorte que l'épaulement peut pénétrer, partiellement au moins, dans le lamage, ce qui assure la fonction anti-arrachement latéral. Dans cette réalisation, l'arrêt en rotation est assuré par une saillie latérale de l'épaulement qui, lorsqu'elle est en face du logement en U, s'encastre axialement dans ce logement pour que l'épaulement tombe axialement dans le lamage.However, in some vehicles, this bunching is made necessary because of difficult conditions to access the spring. The split ring then became a hub in which a U-shaped housing, open laterally, is formed, this housing having a width equal to the diameter of a cylindrical surface provided on the body. One of the axial faces of the hub has also been provided with a countersink of diameter greater than the width of the housing so that the shoulder can penetrate, at least partially, in the countersink, which ensures the anti-tearing function laterally . In this embodiment, the stop in rotation is provided by a lateral projection of the shoulder which, when facing the U-shaped housing, fits axially in this housing so that the shoulder falls axially into the counterbore.

Le corps de l'appareil est prévu pour recevoir à la fois les coupelles primitives et leur variante (deuxième génération). Le diamètre de la portée cylindrique étant donné, la clavette latérale qui coopère avec la bague fendue est de largeur plus petite (inférieure au diamètre de la portée) que la largeur de la saillie latérale de l'épaulement qui est égale au diamètre de la portée cylindrique pour tomber dans le logement en U dont la largeur est justement égale à ce diamètre.The body of the apparatus is intended to receive both the primitive cups and their variant (second generation). The diameter of the cylindrical bearing being given, the lateral key which cooperates with the split ring is of smaller width (smaller than the diameter of the span) than the width of the lateral projection of the shoulder which is equal to the diameter of the span. cylindrical to fall into the U-shaped housing whose width is precisely equal to this diameter.

Au fur et à mesure de l'évolution des amortisseurs de véhicules, on a rencontré des problèmes nouveaux pour associer le compresseur de ressort au ressort de l'amortisseur. Il est apparu notamment le cas où il convient de devoir placer les coupelles sur le ressort puis d'approcher le corps de l'appareil des coupelles pour procéder à l'attachement de celles-ci. Cette manière de procéder ne convient qu'avec les coupelles de deuxième génération et n'est pas satisfaisante.As the vehicle dampers have evolved, new problems have been encountered in associating the spring compressor with the spring of the shock absorber. It appeared in particular the case where it is necessary to place the cups on the spring and then approach the body of the device cups to proceed to the attachment thereof. This procedure is only suitable for second-generation cups and is unsatisfactory.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Par la présente invention, on peut associer à un ressort un compresseur de ressorts équipé de ces coupelles, quelle que soit la configuration rencontrée et la difficulté d'accès.By the present invention, it is possible to associate with a spring a compressor of springs equipped with these cups, whatever the configuration encountered and the difficulty of access.

RESUME DE L'INVENTIONSUMMARY OF THE INVENTION

A cet effet donc, l'invention a pour objet un compresseur de ressort comportant un corps télescopique avec un axe et deux coupelles, chaque coupelle possédant une partie active et une partie d'attachement, le corps comportant des moyens de réception de la partie d'attachement de chaque coupelle, ces moyens comprenant une portée cylindrique avec une partie filetée à l'une de ses extrémités susceptible de coopérer avec un écrou de serrage et un épaulement à son autre extrémité, la portée cylindrique comportant une première clavette en saillie de sa surface extérieure, l'épaulement comportant un contour périphérique non circulaire, la partie d'attachement de chaque coupelle comprenant en outre un moyeu fendu dont la fente est de largeur égale au diamètre de la portée cylindrique et un lamage sur l'une des faces axiales du moyeu dont la périphérie est en correspondance de forme avec la périphérie de l'épaulement.For this purpose, therefore, the invention relates to a spring compressor comprising a telescopic body with an axis and two cups, each cup having an active part and an attachment part, the body having means for receiving the part of attachment of each cup, these means comprising a cylindrical bearing with a threaded portion at one of its ends engageable with a clamping nut and a shoulder at its other end, the cylindrical bearing having a first key projecting from its outer surface, the shoulder comprising a peripheral non-circular contour, the attachment portion of each cup further comprising a split hub whose slot is of width equal to the diameter of the cylindrical bearing surface and a counterbore on one of the axial faces hub whose periphery is in correspondence of shape with the periphery of the shoulder.

Selon l'invention, le moyeu fendu comporte un logement ménagé dans la surface de la fente, apte à recevoir la première clavette pour permettre une rotation au moins partielle de la coupelle par rapport au corps quand l'épaulement n'est pas logé dans le lamage.According to the invention, the split hub comprises a housing formed in the surface of the slot, adapted to receive the first key to allow at least partial rotation of the cup relative to the body when the shoulder is not housed in the countersink.

Cette particularité des coupelles (deuxième génération) permet de supprimer l'obstacle que forme la clavette à une rotation au moins partielle de la coupelle autour de l'axe de la portée alors qu'elle la chevauche mais que l'épaulement n'est pas encore tombé dans le lamage. L'écrou opposé de l'épaulement constitue une aide au soutien de la coupelle. Il participe à son attelage provisoire tournant s'il coopère avec un lamage secondaire de retenue latérale, ménagé sur l'autre des faces axiales de la partie d'attachement. Cette possibilité de rotation de la coupelle, alors qu'elle est déjà attachée au corps de l'outil, permet de faciliter la mise en place sur un ressort de l'ensemble du compresseur, c'est-à-dire du corps (vérin) équipé de ses deux coupelles. L'une au moins des coupelles (partiellement attelée au corps du compresseur comme expliqué ci-dessus), peut pivoter par exemple sur un quart de tour pour être engagée entre les spires du ressort dans un mouvement semblable à celui d'une lame de ciseaux. On peut alors accéder à des ressorts qui auparavant demandaient de mettre en place d'abord les coupelles entre les spires de ressort puis de fixer les coupelles au corps de l'appareil.This peculiarity of the cups (second generation) makes it possible to eliminate the obstacle formed by the key to at least partial rotation of the cup around the axis of the span while it overlaps it but the shoulder is not still fallen in the counter. The opposite nut of the shoulder is a support aid for the cup. He participates in his rotating temporary coupling if he cooperates with a secondary counterbeam lateral retainer, arranged on the other of the axial faces of the attachment part. This possibility of rotation of the cup, while it is already attached to the body of the tool, makes it easier to place on a spring of the entire compressor, that is to say the body (cylinder ) equipped with its two cups. At least one of the cups (partially hitched to the compressor body as explained above), can pivot for example over a quarter of a turn to be engaged between the turns of the spring in a movement similar to that of a scissors blade . It is then possible to access springs that previously required to first place the cups between the spring turns and then to fix the cups to the body of the apparatus.

D'autres caractéristiques et avantages de l'invention ressortiront de la description d'un exemple de réalisation donné ci-après à titre indicatif et non limitatif.Other features and advantages of the invention will emerge from the description of an exemplary embodiment given below by way of indication and not limitation.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

Il sera fait référence au dessin annexé qui représente par une figure unique et partiellement un compresseur de ressort conforme à l'invention.Reference will be made to the appended drawing which shows in a single figure and partially a spring compressor according to the invention.

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

Sur cette figure, un corps de compresseur de ressort conforme à l'invention est représenté à la partie gauche. Il comporte un vérin 1 possédant un cylindre 2 et une tige 3. Cette tige peut se déplacer en extension ou en rétraction par rapport au cylindre 2 le long d'un axe 4. A l'extrémité du cylindre 2 il existe une portée 5 cylindrique encadrée par un épaulement 6 du côté du cylindre 2 et, par un filetage 7 du côté de la tige 3.In this figure, a spring compressor body according to the invention is shown in the left part. It comprises a jack 1 having a cylinder 2 and a rod 3. This rod can move in extension or retraction relative to the cylinder 2 along an axis 4. At the end of the cylinder 2 there is a cylindrical bearing surface 5 framed by a shoulder 6 on the side of the cylinder 2 and, by a thread 7 on the side of the rod 3.

La portée 5 possède une saillie latérale 8 qui constitue un élément de clavetage d'une coupelle comme expliqué dans le document FR 2 647 045 . En outre, l'épaulement 6 possède également une saillie latérale 9 à l'aplomb de la saillie 8 et dont la largeur L est sensiblement égale au diamètre D de la portée cylindrique 5.The bearing 5 has a lateral projection 8 which constitutes a keying element of a cup as explained in the document FR 2 647 045 . In addition, the shoulder 6 also has a lateral projection 9 to the plumb with the projection 8 and whose width L is substantially equal to the diameter D of the cylindrical bearing surface 5.

A son extrémité libre, la tige mobile 3 du vérin 1 possède également une portée cylindrique 10 de même diamètre D que la portée cylindrique 5 susdite encadrée par un épaulement 11 situé à son extrémité libre et par un filetage 12 à l'opposé de l'épaulement. L'épaulement 11 possède un profil identique à l'épaulement 6 avec une partie en saillie 13 de largeur L égale au diamètre D. La portée 10 possède une saillie 14 formant élément de clavetage comme dit précédemment tandis que le filetage 12 peut coopérer avec un écrou 15 ici sous la forme d'une bague moletée. On n'a pas représenté sur la figure le même écrou destiné à coopérer avec le filetage 7 de la portée cylindrique 5.At its free end, the movable rod 3 of the cylinder 1 also has a cylindrical bearing surface 10 of the same diameter D as the aforementioned cylindrical bearing surface 5 surrounded by a shoulder 11 located at its free end and by a thread 12 opposite to the shoulder. The shoulder 11 has a profile identical to the shoulder 6 with a projecting portion 13 of width L equal to the diameter D. The bearing 10 has a projection 14 forming a keying element as said above while the threading 12 can cooperate with a nut 15 here in the form of a knurled ring. It is not shown in the figure the same nut intended to cooperate with the thread 7 of the cylindrical surface 5.

La figure comporte également la représentation d'une coupelle ou mâchoire 20 possédant une partie active 21 par exemple sous la forme d'une piste hélicoïdale tournée vers le bas dans le cas de la figure, et une partie d'attachement 22 sous la forme d'un moyeu fendu. Ce moyeu cylindrique possède donc une fente 23 également à fond cylindrique 24 dont la largeur A est sensiblement égale au diamètre D des portées 5 et 10. Le moyeu 22 peut donc enfourcher l'une ou l'autre de ces portées. Le moyeu est limité par deux faces axiales. L'une d'elles est pourvue d'un lamage 25 dont la périphérie est identique à la périphérie, ici circulaire, de l'un ou l'autre des épaulements 6 et 11, les parties en saillie 9 et 13 pouvant être logées entre les extrémités 25a et 25b de la paroi du lamage interrompue par la fente 23. L'autre face axiale de la partie 22 d'attachement de la coupelle 20 possède également un lamage 26 dans lequel peut pénétrer une partie cylindrique 15a d'un écrou tel que 15.The figure also comprises the representation of a cup or jaw 20 having an active part 21 for example in the form of a helical track facing downwards in the case of the figure, and an attachment part 22 in the form of a split hub. This cylindrical hub thus has a slot 23 also with a cylindrical bottom 24 whose width A is substantially equal to the diameter D of the bearing surfaces 5 and 10. The hub 22 can thus ride on one or the other of these staves. The hub is limited by two axial faces. One of them is provided with a countersink 25 whose periphery is identical to the periphery, here circular, of one or the other of the shoulders 6 and 11, the protruding parts 9 and 13 can be housed between the ends 25 a and 25 b of the wall of the countersink interrupted by the slot 23. the other axial face of the portion 22 of attachment of the cup 20 also has a counterbore 26 in which may penetrate a cylindrical portion 15a of a nut such as 15.

Enfin, la surface intérieure de la fente 23 présente un logement 27 dont la hauteur et la profondeur sont telles que les saillies 8 et 14 des portées cylindriques 5 et 10 ne constituent pas un empêchement pour la coupelle de tourner au moins partiellement autour desdites portées. Cette capacité de rotation est prévue sur au moins 90°.Finally, the inner surface of the slot 23 has a housing 27 whose height and depth are such that the projections 8 and 14 of the cylindrical bearing surfaces 5 and 10 do not constitute an obstacle for the cup to rotate at least partially around said litters. This rotational capacity is provided on at least 90 °.

La coupelle 20 dans la position représentée, est destinée à être accouplée à l'extrémité de la tige 3 du vérin. Lorsqu'on retourne cette coupelle, c'est-à-dire lorsque le lamage 25 est tourné vers le bas, la coupelle peut être associée au cylindre 2 du vérin 1. Le lamage 25 vient alors coiffer l'épaulement 6 avec sa saillie 9 logée dans la fente 23. Un écrou coopérant avec le filetage 7 permet d'immobiliser totalement la coupelle sur le cylindre 2.The cup 20 in the position shown, is intended to be coupled to the end of the rod 3 of the cylinder. When this cup is returned, that is to say when the counterbore 25 is turned downwards, the cup may be associated with the cylinder 2 of the cylinder 1. The counterbore 25 then caps the shoulder 6 with its projection 9 housed in the slot 23. A nut cooperating with the thread 7 makes it possible to completely immobilize the cup on the cylinder 2.

On peut atteler de la même manière la coupelle 20 à l'extrémité de la tige 3 en faisant tomber l'épaulement 11 dans le lamage 25 avec la partie en saillie 13 dans la fente 23 et on peut serrer cette coupelle dans cette position au moyen de l'écrou 15.The cup 20 can be coupled in the same manner to the end of the rod 3 by causing the shoulder 11 to fall into the counterbore 25 with the protruding part 13 into the slot 23 and this cup can be clamped in this position by means of of the nut 15.

Il peut être cependant avantageux d'enfourcher la portée 10 par la partie 22 de la coupelle 20 et, avant de loger l'épaulement 11 dans le lamage 25, de faire tourner cette coupelle autour de la portée 10. La saillie 14 se trouve alors logée dans le logement 27 et le serrage de l'écrou 15 sert à maintenir la coupelle contre son basculement naturel latéral. Ce maintien est d'autant mieux assuré qu'une partie cylindrique 15a pénètre dans le lamage secondaire 26 de la coupelle. Il est donc ainsi possible de décaler angulairement la partie 21 de travail de la coupelle 20 attachée à la tige 3 d'environ 90° par rapport à la partie de travail 21 de la coupelle 20 attachée au cylindre 2. Dans cette configuration, le compresseur de ressort peut être approché du ressort à démonter, de sorte que la coupelle solidaire du cylindre 2 soit en prise avec une spire de ce ressort alors que la coupelle solidaire de la tige 3 soit à l'extérieur de ce ressort. Il suffit alors de faire pivoter cette coupelle supérieure parallèlement à elle-même entre les spires d'un ressort pour pouvoir la placer correctement par rapport à ce ressort. Dans cette position finale, il est alors possible de faire pénétrer l'épaulement 11 dans le lamage 25 et de poursuivre le serrage de l'écrou jusqu'à obtention d'une fixation complète de la coupelle sur le vérin.It may however be advantageous to straddle the bearing 10 by the portion 22 of the cup 20 and, before housing the shoulder 11 in the counterbore 25, to rotate this cup around the bearing 10. The projection 14 is then housed in the housing 27 and the tightening of the nut 15 serves to maintain the cup against its lateral natural tilting. This maintenance is all the more assured that a cylindrical portion 15 has entered the secondary countersink 26 of the cup. It is thus possible to angularly offset the working portion 21 of the cup 20 attached to the rod 3 by about 90 ° relative to the working portion 21 of the cup 20 attached to the cylinder 2. In this configuration, the compressor spring can be approached from the spring to be disassembled, so that the cup integral with the cylinder 2 is engaged with a turn of this spring while the cup integral with the rod 3 is outside this spring. It is then sufficient to rotate this upper cup parallel to itself between the turns of a spring to be able to place it correctly with respect to this spring. In this final position, it is then possible to penetrate the shoulder 11 into the countersink 25 and continue tightening the nut until a complete fixation of the cup on the cylinder.

On comprend que cette possibilité de rotation avant mise en place définitive d'au moins une des coupelles du compresseur de ressort facilite la mise en place de ce compresseur par rapport aux spires du ressort.It is understood that this possibility of rotation before final establishment of at least one of the spring compressor cups facilitates the introduction of this compressor relative to the turns of the spring.

Dans l'exemple de réalisation décrit ci-dessus, le contour périphérique non circulaire de chaque épaulement comporte une partie circulaire et la saillie (clavette) 9, 13. Bien entendu tout autre contour non circulaire de l'épaulement (et du lamage 25) peut convenir, par exemple un contour carré ou polygonal. Il faudra cependant que la correspondance de forme permettant la pénétration de l'épaulement dans le lamage ne permette qu'une position angulaire entre le vérin et chaque coupelle pour que celles-ci soient toujours l'une en face de l'autre afin d'éviter une mauvaise prise du ressort.In the embodiment described above, the non-circular peripheral contour of each shoulder comprises a circular portion and the protrusion (key) 9, 13. Of course, any other non-circular contour of the shoulder (and counterbore 25) may be suitable, for example a square or polygonal outline. However, it will be necessary that the shape matching allowing the penetration of the shoulder in the countersink only allow an angular position between the cylinder and each cup so that they are always opposite each other in order to avoid a bad catch of the spring.

Claims (3)

Compresseur de ressort comportant un corps (1) télescopique avec un axe (4) et deux coupelles (20), chaque coupelle possédant une partie active (21) et une partie d'attachement (22), le corps comportant des moyens de réception de la partie d'attachement (22) de chaque coupelle (20), ces moyens comprenant une portée cylindrique (5, 10) avec une partie filetée (7, 12) à l'une de ses extrémités, susceptible de coopérer avec un écrou (15) de serrage et un épaulement (6, 11) à son autre extrémité, la portée cylindrique (5, 10) comportant une clavette (8, 14) en saillie de sa surface périphérique, l'épaulement comportant un contour périphérique non circulaire, la partie d'attachement (22) de chaque coupelle comprenant un moyeu fendu dont la fente (23) est de largeur (A) égale au diamètre (D) de chaque portée (5, 10) et un lamage sur l'une des faces axiales dont la périphérie est en correspondance de forme avec la périphérie de chaque épaulement, caractérisé en ce que le moyeu fendu comporte un logement (27) ménagé dans la surface de la fente (23) et apte à recevoir la clavette (8, 14) pour permettre une rotation au moins partielle de la coupelle (20) par rapport au corps (1) quand l'épaulement (6, 11) n'est pas logé dans le lamage (25).Spring compressor comprising a telescopic body (1) with an axis (4) and two cups (20), each cup having an active part (21) and an attachment part (22), the body having means for receiving the attachment part (22) of each cup (20), these means comprising a cylindrical seat (5, 10) with a threaded portion (7, 12) at one of its ends, engageable with a nut ( 15) and a shoulder (6, 11) at its other end, the cylindrical seat (5, 10) having a key (8, 14) projecting from its peripheral surface, the shoulder having a non-circular peripheral contour, the attachment portion (22) of each cup comprising a split hub whose slit (23) is of width (A) equal to the diameter (D) of each bearing surface (5, 10) and a countersink on one of the faces whose periphery is in correspondence of shape with the periphery of each shoulder, characterized in that e that the split hub has a housing (27) formed in the surface of the slot (23) and adapted to receive the key (8, 14) to allow at least partial rotation of the cup (20) relative to the body ( 1) when the shoulder (6, 11) is not accommodated in the countersink (25). Compresseur de ressort selon la revendication 1, caractérisé en ce que l'amplitude angulaire du logement (27) autour de l'axe (4) du compresseur est telle qu'elle permet une rotation relative de la coupelle par rapport au corps d'environ 90°.Spring compressor according to claim 1, characterized in that the angular amplitude of the housing (27) around the axis (4) of the compressor is such that it allows a relative rotation of the cup relative to the body of about 90 °. Compresseur de ressort selon la revendication 1 ou la revendication 2, caractérisé en ce que le moyeu fendu comporte sur sa face axiale opposée à celle pourvue du lamage (25), un lamage secondaire (26) qui reçoit l'écrou de serrage (15) pour constituer un moyen de retenue provisoire contre le basculement latéral de la coupelle (20) alors que le lamage principal (25) ne coopère pas encore avec l'épaulement (6, 11).Spring compressor according to Claim 1 or Claim 2, characterized in that the split hub has on its opposite axial face to that provided with the countersink (25) a secondary countersink (26) which receives the clamping nut (15). to constitute a means of restraint Provisional against the lateral tilting of the cup (20) while the main counterbore (25) does not yet cooperate with the shoulder (6, 11).
EP07290200A 2006-02-24 2007-02-16 Spring compressor Withdrawn EP1825960A1 (en)

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FR0601629A FR2897791B1 (en) 2006-02-24 2006-02-24 SPRING COMPRESSOR

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EP1825960A1 true EP1825960A1 (en) 2007-08-29

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647045A1 (en) * 1989-05-19 1990-11-23 Mecanique Energetique DEVICE FOR ASSEMBLING AND DISASSEMBLING HELICAL SPRINGS
DE9216147U1 (en) * 1992-11-27 1993-03-25 SSW Schmack Spezialwerkzeuge GmbH & Co. Entwicklungs KG, 6400 Fulda Spring compressor for mounting coil springs of a vehicle suspension
EP0811547A1 (en) * 1996-06-03 1997-12-10 Mecanique Energetique Improvement in spring compressors
EP1472049A1 (en) * 2002-01-11 2004-11-03 Mecanique Energetique Motor vehicle suspension spring compressor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647045A1 (en) * 1989-05-19 1990-11-23 Mecanique Energetique DEVICE FOR ASSEMBLING AND DISASSEMBLING HELICAL SPRINGS
DE9216147U1 (en) * 1992-11-27 1993-03-25 SSW Schmack Spezialwerkzeuge GmbH & Co. Entwicklungs KG, 6400 Fulda Spring compressor for mounting coil springs of a vehicle suspension
EP0811547A1 (en) * 1996-06-03 1997-12-10 Mecanique Energetique Improvement in spring compressors
EP1472049A1 (en) * 2002-01-11 2004-11-03 Mecanique Energetique Motor vehicle suspension spring compressor

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FR2897791A1 (en) 2007-08-31

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