WO2013114023A1 - Safety device for a helical suspension spring, comprising a central pin - Google Patents

Safety device for a helical suspension spring, comprising a central pin Download PDF

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Publication number
WO2013114023A1
WO2013114023A1 PCT/FR2013/050140 FR2013050140W WO2013114023A1 WO 2013114023 A1 WO2013114023 A1 WO 2013114023A1 FR 2013050140 W FR2013050140 W FR 2013050140W WO 2013114023 A1 WO2013114023 A1 WO 2013114023A1
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WO
WIPO (PCT)
Prior art keywords
spring
safety device
suspension
central axis
vehicle
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PCT/FR2013/050140
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French (fr)
Inventor
Eric Palpacuer
Original Assignee
Peugeot Citroen Automobiles Sa
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Application filed by Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Publication of WO2013114023A1 publication Critical patent/WO2013114023A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F16F1/12—Attachments or mountings
    • F16F1/128—Attachments or mountings with motion-limiting means, e.g. with a full-length guide element or ball joint connections; with protective outer cover

Definitions

  • the present invention relates to a safety device for a coil spring suspension of a vehicle, and a motor vehicle equipped with such safety devices.
  • Motor vehicles generally comprise a suspension system comprising for each wheel a helical spring, which on one side is supported on a movable suspension element connected to the wheel hub, and on the other side on the vehicle body to support it. .
  • suspension springs under the vehicle are generally exposed to projections of gravel that may strike them and damage the protection against corrosion covering them. There is then a risk of oxidation of the spring, which can cause its break in several pieces.
  • the simple fatigue work of the spring can also cause a rupture of this spring.
  • a known rear suspension model comprises on each side a suspension arm of the fired type, comprising forwards a hinge fixed to the vehicle body allowing this arm to oscillate along a substantially transverse axis, and towards the rear a hub receiving a wheel.
  • a helical suspension spring is interposed between the vehicle body and each suspension arm.
  • a telescopic damper connects the body to this arm to dampen the oscillations of the suspension.
  • a problem with this type of suspension is that in case of rupture of the spring in several parts, pieces can come off, fall on the lane, and cause accidents for vehicles that come next. In particular if nothing inside the spring holds the pieces, especially if the damper is disposed outside the spring, these pieces can more easily fall on the track.
  • the loss of suspension spring pieces is an event classified as dangerous, with a high rating in the gravity scale.
  • the design rules and the legislation require that any loss of the spring, or parts thereof, be compensated in case of breakage of this spring.
  • a known type of suspension spring presented in particular by the documents SU-A1-1384852 and US-A-5299786, comprises straps forming strips disposed parallel to the axis of the spring, which connect two adjacent turns of the spring between them. These strips can reduce vibration and noise.
  • the present invention aims in particular to solve these problems of the prior art, by providing a simple and effective way to ensure safety in case of rupture of the suspension springs.
  • a safety device for a coil spring used for the suspension of a vehicle in order to retain pieces in case of rupture of this spring, characterized in that it comprises a central axis disposed substantially according to the spring axis, the ends of which are connected to elements of the vehicle bearing on this spring, and straps fixed on one side to the central axis, and on the other side to different turns of the spring.
  • An advantage of the safety device according to the invention is that the straps fixed on one side to the turns of the spring, and on the other side to the central axis connected to the vehicle, constitute a simple and economical way which allows in case spring break, effectively maintain the main pieces of this spring attached to the vehicle.
  • the security device according to the invention may further comprise one or more of the following features, which may be combined with one another.
  • the central axis comprises an axially elastic material.
  • the safety device comprises at each end of the spring, a support cup interposed between the spring and the vehicle element bearing, comprising a shape for centering the spring.
  • the ends of the central axis are fixed on the support cups.
  • the central axis may comprise at each end a bead comprising a circular groove, in which fits the edge of a hole of a cup.
  • the strips are arranged radially, and have at one end a bore receiving the central axis, and at the other end a loop which receives the spring wire to maintain it.
  • the strips may be arranged substantially along the same axial plane.
  • each strap may be disposed in the axial plane, alternately on one side or the other of the axis of the spring, to successively maintain each turn of this spring.
  • the invention also relates to a motor vehicle having suspension coil springs, comprising safety devices provided to maintain pieces in case of rupture of these springs, which comprise any of the preceding features.
  • the coil suspension springs can be mounted on a rear axle having pull-type suspension arms.
  • FIG. 1 is a side view of a rear suspension arm, comprising a coil spring equipped with a safety device according to the invention
  • FIG. 3 is an axial sectional view of this spring, presented in perspective.
  • FIG. 1 shows a suspension arm 2 of the drawn type generally having a top view in the form of a triangle, comprising a forward-facing side indicated by an arrow marked "AV", which is substantially aligned along a transverse axis of the vehicle.
  • AV forward-facing side indicated by an arrow marked "AV"
  • the front side of the suspension triangle 2 comprises two spaced joints 4 fixed under the body of the vehicle 6, allowing the suspension arm 2 to pivot along the transverse axis defined by these two joints.
  • the rear portion of the suspension arm 2 comprises a not shown wheel hub, which supports one of the rear wheels of the vehicle.
  • a helical suspension spring 20 placed rearwardly of the suspension arm 2, comprising a safety device 10, is disposed along a substantially vertical axis, between this arm and the vehicle body 6 to support this body.
  • a telescopic damper is disposed outside the coil spring 20 to connect the suspension arm 2 and the vehicle body 6, in order to damp the oscillations of the suspension.
  • Each end of the suspension spring 20 receives a support cup 12 fixed to the suspension arm 2 or the vehicle body 6, which is interposed to maintain the spring in position, while avoiding wear of the surfaces in contact.
  • FIGS. 2 and 3 show the cups 12 made in a pressed and cut steel sheet, each comprising an annular boss 30 centered inside the end turn of the spring 20, which extends radially outwards by an outer flat contour 32 tight between this spring and the vehicle element bearing 2, 6, and radially inwardly by an inner flat contour 34 having a central bore.
  • the cups 12 perform both a centering of the ends of the spring 20, and a protection of the bearing faces on the spring.
  • the safety device 10 comprises a central axis 22 made of an elastic material, disposed along the axis of the spring 20, comprising at each end a bead 26 for fixing the cups 12 which has an outer circular groove.
  • each cup 12 fits snugly in the circular groove of one of the beads 26, so as to achieve a solid attachment of the ends of the central axis 22.
  • the insertion of the edges of the bore central in the circular groove, is through a deformation of the elastic material of the central axis 22.
  • the elastic central axis 22 makes it possible to follow the spacing variations of the cups 12 coming from the displacements of the suspension, from complete compression to full expansion of the spring 20, while ensuring continuity between this axis and the cups, fixed they themselves to the suspension arm 2 or to the vehicle body 6.
  • the safety device 10 further comprises strips 24 arranged radially, which can be made in particular by molding a plastic material.
  • Each strap 24 has at one end a bore receiving the central axis 22, allowing a sliding of the strap relative to this axis, and at the other end a loop which fits tightly the spring wire 20 to maintain it.
  • the set of strips 24 is disposed along the same axial plane, each strip coming in this plane alternately on one side or the other of the axis of the spring 20, to successively maintain each turn of this spring.
  • the safety device 10 constitutes a protection attached to the turns of the spring 20 at different regularly spaced points, which are connected to the vehicle by the central axis 22, then by the cups 12. In the event of failure of the spring 20, the main pieces are held in the vehicle by this safety device 10.
  • a safety device 10 having a reduced quantity of material and a low mass is thus economically produced.
  • the straps 24 fixed on the spring 20 can limit vibrations of the turns of this spring, and noise.
  • the safety device 10 can easily fit on an existing running gear. It can advantageously be adapted without significant modification, on a running gear comprising pull-type rear suspension arms, which generally comprise suspension springs 20 exposed to the projections of gravel.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

A safety device for a helical spring (20) used for the suspension of a vehicle, in order to hold pieces in case of breakage of the spring, characterised in that it comprises a central pin (22) disposed substantially along the axis of the spring (20), whereof the ends are linked to elements of the vehicle (2, 6) resting on said spring, and bands (24) secured at one end to the central pin, and at the other end to different coils of the spring.

Description

DISPOSITIF DE SECURITE POUR UN RESSORT HELICOÏDAL DE SUSPENSION, COMPORTANT UN AXE CENTRAL  SAFETY DEVICE FOR A HELICOIDAL SUSPENSION SPRING, COMPRISING A CENTRAL AXIS
La présente invention concerne un dispositif de sécurité pour un ressort hélicoïdal de suspension d'un véhicule, ainsi qu'un véhicule automobile équipé de tels dispositifs de sécurité. The present invention relates to a safety device for a coil spring suspension of a vehicle, and a motor vehicle equipped with such safety devices.
Les véhicules automobiles comportent généralement un système de suspension comprenant pour chaque roue un ressort hélicoïdal, qui d'un côté prend appui sur un élément mobile de suspension lié au moyeu de roue, et de l'autre côté sur la caisse du véhicule pour la supporter.  Motor vehicles generally comprise a suspension system comprising for each wheel a helical spring, which on one side is supported on a movable suspension element connected to the wheel hub, and on the other side on the vehicle body to support it. .
Les ressorts de suspension se trouvant sous le véhicule, en particulier les ressorts de suspension arrière, sont généralement exposés aux projections de graviers qui peuvent venir les frapper et endommager la protection contre la corrosion les recouvrant. On a alors un risque d'oxydation du ressort, qui peut entraîner sa rupture en plusieurs morceaux.  The suspension springs under the vehicle, in particular the rear suspension springs, are generally exposed to projections of gravel that may strike them and damage the protection against corrosion covering them. There is then a risk of oxidation of the spring, which can cause its break in several pieces.
Par ailleurs, le simple travail en fatigue du ressort peut aussi entraîner une rupture de ce ressort.  Moreover, the simple fatigue work of the spring can also cause a rupture of this spring.
Un modèle de train arrière connu, comporte de chaque côté un bras de suspension du type tiré, comprenant vers l'avant une articulation fixée à la caisse du véhicule permettant à ce bras d'osciller suivant un axe sensiblement transversal, et vers l'arrière un moyeu recevant une roue. Un ressort hélicoïdal de suspension est interposé entre la caisse du véhicule et chaque bras de suspension. Un amortisseur télescopique relie la caisse à ce bras, pour amortir les oscillations de la suspension.  A known rear suspension model comprises on each side a suspension arm of the fired type, comprising forwards a hinge fixed to the vehicle body allowing this arm to oscillate along a substantially transverse axis, and towards the rear a hub receiving a wheel. A helical suspension spring is interposed between the vehicle body and each suspension arm. A telescopic damper connects the body to this arm to dampen the oscillations of the suspension.
Un problème qui se pose avec ce type de suspension est qu'en cas de rupture du ressort en plusieurs parties, des morceaux peuvent se détacher, tomber sur la voie de circulation, et entraîner des accidents pour les véhicules qui viennent ensuite. En particulier si rien à l'intérieur du ressort ne retient les morceaux, notamment si l'amortisseur est disposé à l'extérieur de ce ressort, ces morceaux peuvent plus facilement tomber sur la voie. La perte de morceaux de ressort de suspension est un événement classé comme dangereux, comportant une cotation élevée dans l'échelle des gravités. Les règles de conception ainsi que la législation imposent de palier à toute perte du ressort, ou de morceaux de celui-ci en cas de rupture de ce ressort. A problem with this type of suspension is that in case of rupture of the spring in several parts, pieces can come off, fall on the lane, and cause accidents for vehicles that come next. In particular if nothing inside the spring holds the pieces, especially if the damper is disposed outside the spring, these pieces can more easily fall on the track. The loss of suspension spring pieces is an event classified as dangerous, with a high rating in the gravity scale. The design rules and the legislation require that any loss of the spring, or parts thereof, be compensated in case of breakage of this spring.
Un type de ressort de suspension connu, présenté notamment par les documents SU-A1 -1384852 et US-A-5299786, comporte des lanières formant des bandes disposées parallèlement à l'axe du ressort, qui relient deux spires adjacentes du ressort entre elles. Ces lanières peuvent notamment réduire les vibrations et les bruits.  A known type of suspension spring, presented in particular by the documents SU-A1-1384852 and US-A-5299786, comprises straps forming strips disposed parallel to the axis of the spring, which connect two adjacent turns of the spring between them. These strips can reduce vibration and noise.
Toutefois en cas de rupture du ressort en plusieurs morceaux, rien ne relie les lanières au véhicule, et un morceau comportant des lanières, ou un groupe de morceaux restant reliés entre eux par ces lanières, peuvent tomber sur la voie.  However, in case of rupture of the spring in several pieces, nothing connects the straps to the vehicle, and a piece with straps, or a group of pieces remaining interconnected by these straps, can fall on the track.
La présente invention a notamment pour but de résoudre ces problèmes de l'art antérieur, en proposant un moyen simple et efficace permettant d'assurer la sécurité en cas de rupture des ressorts de suspension.  The present invention aims in particular to solve these problems of the prior art, by providing a simple and effective way to ensure safety in case of rupture of the suspension springs.
Elle propose à cet effet un dispositif de sécurité pour un ressort hélicoïdal utilisé pour la suspension d'un véhicule, afin de retenir des morceaux en cas de rupture de ce ressort, caractérisé en ce qu'il comporte un axe central disposé sensiblement suivant l'axe du ressort, dont les extrémités sont reliées à des éléments du véhicule en appui sur ce ressort, et des lanières fixées d'un côté à l'axe central, et de l'autre côté à différentes spires du ressort.  It proposes for this purpose a safety device for a coil spring used for the suspension of a vehicle, in order to retain pieces in case of rupture of this spring, characterized in that it comprises a central axis disposed substantially according to the spring axis, the ends of which are connected to elements of the vehicle bearing on this spring, and straps fixed on one side to the central axis, and on the other side to different turns of the spring.
Un avantage du dispositif de sécurité selon l'invention, est que les lanières fixées d'un côté aux spires du ressort, et de l'autre côté à l'axe central lié au véhicule, constituent un moyen simple et économique qui permet en cas de rupture du ressort, de maintenir de manière efficace les principaux morceaux de ce ressort attachés au véhicule. Le dispositif de sécurité selon l'invention peut de plus comporter une ou plusieurs des caractéristiques suivantes, qui peuvent être combinées entre elles. An advantage of the safety device according to the invention is that the straps fixed on one side to the turns of the spring, and on the other side to the central axis connected to the vehicle, constitute a simple and economical way which allows in case spring break, effectively maintain the main pieces of this spring attached to the vehicle. The security device according to the invention may further comprise one or more of the following features, which may be combined with one another.
Avantageusement, l'axe central comporte une matière axialement élastique.  Advantageously, the central axis comprises an axially elastic material.
Avantageusement, le dispositif de sécurité comporte à chaque extrémité du ressort, une coupelle d'appui intercalée entre ce ressort et l'élément du véhicule en appui, comprenant une forme pour le centrage du ressort.  Advantageously, the safety device comprises at each end of the spring, a support cup interposed between the spring and the vehicle element bearing, comprising a shape for centering the spring.
Avantageusement, les extrémités de l'axe central sont fixées sur les coupelles d'appui.  Advantageously, the ends of the central axis are fixed on the support cups.
L'axe central peut comporter à chaque extrémité un bourrelet comprenant une rainure circulaire, dans laquelle s'emboîte le bord d'un perçage d'une coupelle.  The central axis may comprise at each end a bead comprising a circular groove, in which fits the edge of a hole of a cup.
Avantageusement, les lanières sont disposées radialement, et comportent à une extrémité un perçage recevant l'axe central, et à l'autre extrémité une boucle qui reçoit le fil du ressort pour le maintenir.  Advantageously, the strips are arranged radially, and have at one end a bore receiving the central axis, and at the other end a loop which receives the spring wire to maintain it.
Les lanières peuvent être disposées sensiblement suivant un même plan axial.  The strips may be arranged substantially along the same axial plane.
En particulier, chaque lanière peut être disposée dans le plan axial, alternativement d'un côté ou de l'autre de l'axe du ressort, pour maintenir successivement chaque spire de ce ressort.  In particular, each strap may be disposed in the axial plane, alternately on one side or the other of the axis of the spring, to successively maintain each turn of this spring.
L'invention a aussi pour objet un véhicule automobile disposant de ressorts hélicoïdaux de suspension, comportant des dispositifs de sécurité prévus pour maintenir des morceaux en cas de rupture de ces ressorts, qui comprennent l'une quelconque des caractéristiques précédentes.  The invention also relates to a motor vehicle having suspension coil springs, comprising safety devices provided to maintain pieces in case of rupture of these springs, which comprise any of the preceding features.
En particulier, les ressorts hélicoïdaux de suspension peuvent être montés sur un train arrière comportant des bras de suspension du type tiré.  In particular, the coil suspension springs can be mounted on a rear axle having pull-type suspension arms.
L'invention sera mieux comprise et d'autres caractéristiques et avantages apparaîtront plus clairement à la lecture de la description ci-après, donnée à titre d'exemple et de manière non limitative, en référence aux dessins annexés dans lesquels : - la figure 1 est une vue de côté d'un bras de suspension arrière, comprenant un ressort hélicoïdal équipé d'un dispositif de sécurité selon l'invention ; The invention will be better understood and other features and advantages will emerge more clearly on reading the following description, given by way of example and in a nonlimiting manner, with reference to the appended drawings in which: - Figure 1 is a side view of a rear suspension arm, comprising a coil spring equipped with a safety device according to the invention;
- la figure 2 est une vue en coupe axiale de ce ressort ; et  - Figure 2 is an axial sectional view of this spring; and
- la figure 3 est une vue en coupe axiale de ce ressort, présentée en perspective.  - Figure 3 is an axial sectional view of this spring, presented in perspective.
La figure 1 présente un bras de suspension 2 du type tiré ayant globalement en vue de dessus la forme d'un triangle, comprenant un côté disposé vers l'avant indiqué par une flèche marquée « AV », qui est sensiblement aligné suivant un axe transversal du véhicule.  FIG. 1 shows a suspension arm 2 of the drawn type generally having a top view in the form of a triangle, comprising a forward-facing side indicated by an arrow marked "AV", which is substantially aligned along a transverse axis of the vehicle.
Le côté avant du triangle de suspension 2 comporte deux articulations espacées 4 fixées sous la caisse du véhicule 6, permettant au bras de suspension 2 de pivoter suivant l'axe transversal défini par ces deux articulations.  The front side of the suspension triangle 2 comprises two spaced joints 4 fixed under the body of the vehicle 6, allowing the suspension arm 2 to pivot along the transverse axis defined by these two joints.
La partie arrière du bras de suspension 2 comporte un moyeu de roue non représenté, qui supporte une des roues arrière du véhicule.  The rear portion of the suspension arm 2 comprises a not shown wheel hub, which supports one of the rear wheels of the vehicle.
Un ressort hélicoïdal de suspension 20 placé vers l'arrière du bras de suspension 2, comportant un dispositif de sécurité 10, est disposé suivant un axe sensiblement vertical, entre ce bras et la caisse du véhicule 6 pour soutenir cette caisse.  A helical suspension spring 20 placed rearwardly of the suspension arm 2, comprising a safety device 10, is disposed along a substantially vertical axis, between this arm and the vehicle body 6 to support this body.
Un amortisseur télescopique non représenté, est disposé à l'extérieur du ressort hélicoïdal 20 pour relier le bras de suspension 2 et la caisse du véhicule 6, afin d'amortir les oscillations de la suspension.  A telescopic damper, not shown, is disposed outside the coil spring 20 to connect the suspension arm 2 and the vehicle body 6, in order to damp the oscillations of the suspension.
Chaque extrémité du ressort de suspension 20 reçoit une coupelle d'appui 12 fixée sur le bras de suspension 2 ou sur la caisse du véhicule 6, qui est intercalée pour maintenir le ressort en position, tout en évitant une usure des surfaces en contact.  Each end of the suspension spring 20 receives a support cup 12 fixed to the suspension arm 2 or the vehicle body 6, which is interposed to maintain the spring in position, while avoiding wear of the surfaces in contact.
Les figures 2 et 3 présentent les coupelles 12 réalisées dans une tôle d'acier emboutie et découpée, comportant chacune un bossage annulaire 30 centré à l'intérieur de la spire d'extrémité du ressort 20, qui se prolonge radialement vers l'extérieur par un contour plat externe 32 serré entre ce ressort et l'élément du véhicule en appui 2, 6, et radialement vers l'intérieur par un contour plat interne 34 comportant un perçage central. FIGS. 2 and 3 show the cups 12 made in a pressed and cut steel sheet, each comprising an annular boss 30 centered inside the end turn of the spring 20, which extends radially outwards by an outer flat contour 32 tight between this spring and the vehicle element bearing 2, 6, and radially inwardly by an inner flat contour 34 having a central bore.
Les coupelles 12 réalisent à la fois un centrage des extrémités du ressort 20, et une protection des faces d'appui sur ce ressort.  The cups 12 perform both a centering of the ends of the spring 20, and a protection of the bearing faces on the spring.
Le dispositif de sécurité 10 comporte un axe central 22 réalisé dans une matière élastique, disposé suivant l'axe du ressort 20, comprenant à chaque extrémité un bourrelet 26 de fixation aux coupelles 12 qui comporte une rainure circulaire extérieure.  The safety device 10 comprises a central axis 22 made of an elastic material, disposed along the axis of the spring 20, comprising at each end a bead 26 for fixing the cups 12 which has an outer circular groove.
Les bords du perçage central de chaque coupelle 12, s'emboîte de manière serrée dans la rainure circulaire d'un des bourrelets 26, de manière à réaliser une fixation solide des extrémités de l'axe central 22. L'insertion des bords du perçage central dans la rainure circulaire, se fait grâce à une déformation de la matière élastique de l'axe central 22.  The edges of the central bore of each cup 12, fits snugly in the circular groove of one of the beads 26, so as to achieve a solid attachment of the ends of the central axis 22. The insertion of the edges of the bore central in the circular groove, is through a deformation of the elastic material of the central axis 22.
L'axe central élastique 22 permet de suivre les variations d'écartement des coupelles 12 venant des débattements de la suspension, d'une compression complète à une détente complète du ressort 20, tout en assurant une continuité entre cet axe et les coupelles, fixées elles mêmes au bras de suspension 2 ou à la caisse du véhicule 6.  The elastic central axis 22 makes it possible to follow the spacing variations of the cups 12 coming from the displacements of the suspension, from complete compression to full expansion of the spring 20, while ensuring continuity between this axis and the cups, fixed they themselves to the suspension arm 2 or to the vehicle body 6.
Le dispositif de sécurité 10 comporte de plus des lanières 24 disposées radialement, qui peuvent être réalisées notamment par un moulage d'une matière plastique. Chaque lanière 24 comporte à une extrémité un perçage recevant l'axe central 22, permettant un coulissement de la lanière par rapport à cet axe, et à l'autre extrémité une boucle qui reçoit de manière ajustée le fil du ressort 20 pour le maintenir.  The safety device 10 further comprises strips 24 arranged radially, which can be made in particular by molding a plastic material. Each strap 24 has at one end a bore receiving the central axis 22, allowing a sliding of the strap relative to this axis, and at the other end a loop which fits tightly the spring wire 20 to maintain it.
L'ensemble des lanières 24 est disposé suivant un même plan axial, chaque lanière venant dans ce plan alternativement d'un côté ou de l'autre de l'axe du ressort 20, pour maintenir successivement chaque spire de ce ressort.  The set of strips 24 is disposed along the same axial plane, each strip coming in this plane alternately on one side or the other of the axis of the spring 20, to successively maintain each turn of this spring.
Le dispositif de sécurité 10 constitue une protection attachée aux spires du ressort 20 en différents points espacés régulièrement, qui sont reliés au véhicule par l'axe central 22, puis par les coupelles 12. En cas de rupture du ressort 20, les principaux morceaux restent maintenus au véhicule par ce dispositif de sécurité 10. The safety device 10 constitutes a protection attached to the turns of the spring 20 at different regularly spaced points, which are connected to the vehicle by the central axis 22, then by the cups 12. In the event of failure of the spring 20, the main pieces are held in the vehicle by this safety device 10.
On réalise ainsi de manière économique, un dispositif de sécurité 10 comportant une quantité de matière réduite, et une faible masse.  A safety device 10 having a reduced quantity of material and a low mass is thus economically produced.
On notera qu'avec ce dispositif de sécurité, on ne change pas les caractéristiques de raideur et d'amortissement de la suspension. Par contre les lanières 24 fixées sur le ressort 20 peuvent limiter des vibrations des spires de ce ressort, et des bruits.  Note that with this safety device, it does not change the characteristics of stiffness and damping of the suspension. On the other hand the straps 24 fixed on the spring 20 can limit vibrations of the turns of this spring, and noise.
Le dispositif de sécurité 10 peut facilement s'adapter sur un train roulant existant. On peut avantageusement l'adapter sans modification notable, sur un train roulant comprenant des bras de suspension arrière du type tiré, qui comportent généralement des ressorts de suspension 20 exposés aux projections de gravillons.  The safety device 10 can easily fit on an existing running gear. It can advantageously be adapted without significant modification, on a running gear comprising pull-type rear suspension arms, which generally comprise suspension springs 20 exposed to the projections of gravel.

Claims

REVENDICATIONS
1 - Dispositif de sécurité pour un ressort hélicoïdal (20) utilisé pour la suspension d'un véhicule, afin de retenir des morceaux en cas de rupture de ce ressort, caractérisé en ce qu'il comporte un axe central (22) disposé sensiblement suivant l'axe du ressort (20), dont les extrémités sont reliées à des éléments du véhicule (2, 6) en appui sur ce ressort, et des lanières (24) fixées d'un côté à l'axe central, et de l'autre côté à différentes spires du ressort. 1 - Safety device for a coil spring (20) used for the suspension of a vehicle, in order to retain pieces in case of rupture of this spring, characterized in that it comprises a central axis (22) arranged substantially following the axis of the spring (20), the ends of which are connected to elements of the vehicle (2, 6) resting on this spring, and strips (24) fixed on one side to the central axis, and of the other side at different turns of the spring.
2 - Dispositif de sécurité pour un ressort selon la revendication 1 , caractérisé en ce que l'axe central (22) comporte une matière axialement élastique.  2 - Safety device for a spring according to claim 1, characterized in that the central axis (22) comprises an axially elastic material.
3 - Dispositif de sécurité pour un ressort selon la revendication 1 ou 2, caractérisé en ce qu'il comporte à chaque extrémité du ressort (20), une coupelle d'appui (12) intercalée entre ce ressort et l'élément du véhicule en appui (2, 6), comprenant une forme pour le centrage (30) du ressort.  3 - Safety device for a spring according to claim 1 or 2, characterized in that it comprises at each end of the spring (20), a support cup (12) interposed between the spring and the vehicle element in support (2, 6) comprising a shape for centering (30) the spring.
4 - Dispositif de sécurité pour un ressort selon la revendication 3, caractérisé en ce que les extrémités (26) de l'axe central (22) sont fixées sur les coupelles d'appui (12).  4 - Safety device for a spring according to claim 3, characterized in that the ends (26) of the central axis (22) are fixed on the support cups (12).
5 - Dispositif de sécurité pour un ressort selon la revendication 4, caractérisé en ce que l'axe central (22) comporte à chaque extrémité un bourrelet (26) comprenant une rainure circulaire, dans laquelle s'emboîte le bord d'un perçage d'une coupelle (12).  5 - A safety device for a spring according to claim 4, characterized in that the central axis (22) comprises at each end a bead (26) comprising a circular groove, in which the edge of a hole d a cup (12).
6 - Dispositif de sécurité pour un ressort selon l'une quelconque des revendications précédentes, caractérisé en ce que les lanières (24) sont disposées radialement, et comportent à une extrémité un perçage recevant l'axe central (22), et à l'autre extrémité une boucle qui reçoit le fil du ressort (20) pour le maintenir.  6 - Safety device for a spring according to any one of the preceding claims, characterized in that the strips (24) are arranged radially, and comprise at one end a bore receiving the central axis (22), and at the another end a loop that receives the spring wire (20) to hold it.
7 - Dispositif de sécurité pour un ressort selon la revendication 6, caractérisé en ce que les lanières (24) sont disposées sensiblement suivant un même plan axial. 8 - Dispositif de sécurité pour un ressort selon la revendication 7, caractérisé en ce que chaque lanière (24) est disposée dans le plan axial, alternativement d'un côté ou de l'autre de l'axe du ressort (20), pour maintenir successivement chaque spire de ce ressort. 7 - Safety device for a spring according to claim 6, characterized in that the strips (24) are arranged substantially in the same axial plane. 8 - Safety device for a spring according to claim 7, characterized in that each strap (24) is disposed in the axial plane, alternately on one side or the other of the axis of the spring (20), for maintain successively each turn of this spring.
9 - Véhicule automobile disposant de ressorts hélicoïdaux de suspension (20) comportant des dispositifs de sécurité (10) prévus pour maintenir des morceaux en cas de rupture de ces ressorts, caractérisé en ce que ces dispositifs de sécurité sont réalisés selon l'une quelconque des revendications précédentes.  9 - A motor vehicle having suspension coil springs (20) comprising safety devices (10) provided for holding pieces in case of rupture of these springs, characterized in that these safety devices are made according to any one of preceding claims.
10 - Véhicule automobile selon la revendication 9, caractérisé en ce que les ressorts hélicoïdaux de suspension (10) sont montés sur un train arrière comportant des bras de suspension du type tiré (2).  10 - Motor vehicle according to claim 9, characterized in that the coil suspension springs (10) are mounted on a rear axle having pull-type suspension arms (2).
PCT/FR2013/050140 2012-01-30 2013-01-23 Safety device for a helical suspension spring, comprising a central pin WO2013114023A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1250830A FR2986293B1 (en) 2012-01-30 2012-01-30 SAFETY DEVICE FOR A HELICOIDAL SUSPENSION SPRING, COMPRISING A CENTRAL AXIS
FR1250830 2012-01-30

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WO2013114023A1 true WO2013114023A1 (en) 2013-08-08

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CN112709776A (en) * 2020-12-31 2021-04-27 邢台任卓机械制造有限公司 Intelligent shock absorber for car with spring fracture protect function

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004386A1 (en) * 2013-04-15 2014-10-17 Peugeot Citroen Automobiles Sa SPRING DEVICE, ESPECIALLY FOR REAR SUSPENSION SPRING TRAINS OF A MOTOR VEHICLE AND REAR SUSPENSION SPRING RELEASE FOR MOTOR VEHICLES

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SU1384852A1 (en) 1986-10-04 1988-03-30 Предприятие П/Я Г-4725 Shock absorber
US5299786A (en) 1993-03-17 1994-04-05 Freudenberg-Nok General Partnership Noise suppression member
EP2339201A1 (en) * 2009-12-22 2011-06-29 Eads Construcciones Aeronauticas S.A. Coiled device

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SU1384852A1 (en) 1986-10-04 1988-03-30 Предприятие П/Я Г-4725 Shock absorber
US5299786A (en) 1993-03-17 1994-04-05 Freudenberg-Nok General Partnership Noise suppression member
EP2339201A1 (en) * 2009-12-22 2011-06-29 Eads Construcciones Aeronauticas S.A. Coiled device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112709776A (en) * 2020-12-31 2021-04-27 邢台任卓机械制造有限公司 Intelligent shock absorber for car with spring fracture protect function

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FR2986293A1 (en) 2013-08-02

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