EP1089890A1 - Upper coupling attachment for macpherson strut - Google Patents

Upper coupling attachment for macpherson strut

Info

Publication number
EP1089890A1
EP1089890A1 EP98933737A EP98933737A EP1089890A1 EP 1089890 A1 EP1089890 A1 EP 1089890A1 EP 98933737 A EP98933737 A EP 98933737A EP 98933737 A EP98933737 A EP 98933737A EP 1089890 A1 EP1089890 A1 EP 1089890A1
Authority
EP
European Patent Office
Prior art keywords
frame
central
flange
bearing
mounting surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98933737A
Other languages
German (de)
French (fr)
Inventor
Etienne De Fontenay
Antoine Ducloux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Generale des Etablissements Michelin SCA
Original Assignee
Compagnie Generale des Etablissements Michelin SCA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Generale des Etablissements Michelin SCA filed Critical Compagnie Generale des Etablissements Michelin SCA
Publication of EP1089890A1 publication Critical patent/EP1089890A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
    • B60G15/068—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit specially adapted for MacPherson strut-type suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/40—Indexing codes relating to the wheels in the suspensions
    • B60G2200/46—Indexing codes relating to the wheels in the suspensions camber angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B60G2202/312—The spring being a wound spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B60G2204/1242—Mounting of coil springs on a damper, e.g. MacPerson strut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/43—Fittings, brackets or knuckles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/44—Centering or positioning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B60G2204/4502—Stops limiting travel using resilient buffer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/61—Adjustable during maintenance

Definitions

  • the present invention relates to the struts of Mac Pherson type suspensions. These struts contain a cylinder and a spring surrounding the cylinder. The cylinder provides transverse guidance holding the wheel carrier, and generally contains a shock absorber. The invention relates in particular to the fasteners which constitute a filtering and connecting piece ensuring the anchoring to the body of the upper part of the Mac Pherson struts and which, if necessary, also provide support for the spring. In the case of struts for steered wheels, a bearing provides the necessary degree of freedom of rotation between the wheel carrier and the bearing surface on the body.
  • These fasteners include a filtering and decoupling joint, here called an elastic joint, on the path for transmitting the forces from the rod of the jack to the body. Sometimes, they also have one or more elastic shims separate from the elastic joint, on the path of transmission of the forces from the spring to the body. This separate elastic block allows independent filtering of the forces transmitted by the spring and provides better comfort. Or the path for transmitting the forces from the spring to the body also passes through the elastic articulation. There are many alternative embodiments of such fasteners.
  • the present invention relates only to struts in which the force transmitted by the shock absorber rod passes through the elastic joint and in which the vehicle load does not pass through said elastic joint.
  • the objective of the invention is to improve the compactness of the struts, more precisely the compactness of the assembly located in the upper part of the strut, in order to give free rein to stylists who wish to design hoods for more and more plunging. It is indeed advantageous to have as few constraints as possible on the size of the suspensions. Another objective of the invention is to reduce the cost price of such fasteners, without prejudice to their quality of filtering out the vibrations appearing when the vehicle is traveling on a roadway. This filtering is very important for passenger comfort.
  • the invention relates to a top attachment for Mac Pherson vehicle suspension, comprising : • a mounting range on the vehicle body,
  • a central opening intended to receive the rod of a strut having a body and a rod sliding in said body, the central opening determining the position of an axis around which the body rotates relative to the rod,
  • a central frame comprising on one side said central opening and on the other a rim
  • An external frame comprising said mounting surface, said external frame comprising a flange surrounding a central orifice,
  • said fastener is such that •
  • the central reinforcement and external reinforcement are shaped relative to each other so that the central reinforcement does not pass through the central orifice
  • the central reinforcement and external reinforcement are positioned in relation to one another so that the external reinforcement at least partially surrounds the central reinforcement, and so that the anchoring surfaces partially overlap radially, the anchoring surfaces being axially offset,
  • said bearing surface and said centering surface for the cup being included axially between the mounting surface and the flange.
  • said fastener is such that said elastic shim is made of an elastomeric material devoid of metal reinforcement in its thickness between the mounting surface and the bearing surface for the bearing.
  • said fastener is such that
  • the central reinforcement and external reinforcement are positioned in relation to each other so that the external reinforcement at least partially surrounds the central reinforcement, and such that the anchor surfaces partially overlap radially, the anchor surfaces being axially offset,
  • the central frame has a substantially truncated side wall developing on the side of said central opening opposite the side receiving the strut, the virtual apex of the cone being located on the side of said central opening receiving the strut, said side wall having a maximum diameter ⁇ M , the radially outer face of said side wall comprising said anchoring surface of the elastic joint,
  • the outer frame includes an upper flange incorporating said mounting surface on the body, said flange being extended by a substantially truncated side wall comprising the anchoring surface of the elastic joint, said substantially truncated side wall extending axially from side opposite to said mounting surface, said substantially truncated wall having a minimum diameter ⁇ m , with ⁇ M strictly greater than ⁇ m
  • the central opening geometrically perfectly defines the mounting of the strut on the fastener because it is an area through which one of the frames rests on the strut rod; there is no degree of freedom between the rod and said frame.
  • the proposed attachment fulfills the articulation functions allowing movements of the strut around the turning axis when the attachment is used for a steering wheel. In all uses, it fulfills the functions of filtering the spring by the elastic shim, and filtering the shock absorber by the articulation.
  • this type of suspension generally includes a so-called shock stop: it is an elastomer block against which the body of the shock absorber strikes when the suspension comes into travel stop.
  • the invention allows an advantageous implantation of said impact stop.
  • the suspension comprises a bowl mounted on the rod and containing at least partially an impact stop concentric to the strut, said bowl being in contact with said central opening of said central frame, said bowl having a surface of support in the axial extension of the rim of the external frame.
  • the invention makes it possible to pass the load transmitted to the body through the impact stop without passing m through the articulation, or through the bearing in the case of use on steered wheels. Indeed, shocks, even filtered by the shock stop, are detrimental to the good behavior of the bearing, and the elastic articulation of this type of fastener is not designed to take up large loads because the load of the spring does not does not pass through said joint.
  • the suspension comprises a spring, the first turn of which is included axially between the mounting surface and the edge of the outer frame, or else, in the case of steered wheels, comprises a spring and a bearing, one of the cages of which constitutes said cup or is resting on said cup, the bearing being included axially between the mounting surface and the flange, and the other of the cages of which rotates with the spring to follow the orientation of the steered wheels
  • the invention makes it possible to reduce the number of parts constituting the upper anchoring of the strut on the vehicle body. It allows a very high bearing to be installed, at the same height as the elastic joint. Thus, the bearing does not cause any excess thickness relative to the fastener itself.
  • the overall height of the fastener is dictated only by the proportions of the elastic articulation ensuring the decoupling between the rod of the strut jack and the vehicle body, as well as the filtering ensuring in particular better acoustic comfort.
  • Figure 1 shows a first variant
  • Figure 2 shows a second variant distinguished from the first by the way the bearing is supported
  • Figure 3 shows an exploded view of this second variant
  • Figure 4 shows a third variant in which the housing of the fastener on the vehicle body is different
  • Figure 5 shows the third variant in a configuration in travel stop.
  • a strut 1 of a Mac Pherson type wheel suspension which we see in particular the rod 10 of the jack.
  • the rod 10 slides in a body 11 to which is connected a wheel carrier (not shown).
  • a wheel carrier not shown
  • the damping force is opposed to the relative movement of the rod 10 and of the body 11
  • the body 2 of the vehicle is partially seen.
  • the fastener A is the member allowing both the mounting of the strut 1 on the body 2 and the filtering of rolling vibrations, and which allows a certain movement of the jack relative to the body 2.
  • the fastener A is in functional connection with other elements by the following parts:
  • a bearing surface 52 for a cup (here the cup is one of the cages of the bearing B, which corresponds to a particular embodiment) transmitting the load seen by the spring 4 to the body 2,
  • a centering surface of said cup here the cylindrical face 360
  • the fastener A comprises an elastic block 5 independent of the elastic joint 33.
  • the elastic block 5, preferably made of elastomeric material, is inserted on the path transmission of the support forces of the spring 4 on the body 2 of the vehicle.
  • a bearing B whose balls 6 can be seen is interposed between the spring 4 and the shim 5.
  • the upper cup of the spring and the first cage 61 of the bearing B form here one and the same room.
  • the first turn 41 of the spring 4 is substantially flat, and rests on a cushion 60, which is also preferably made of elastomeric material.
  • This cushion 60 makes it possible to distribute the load of the spring 4 well on the periphery of the first cage 61, at least on a pre-dimensioned support arc. Said cushion 60 also provides a first damping stage attenuating the vibrations of the spring 4. More generally, any form of cushion inserted between the first turn of the spring 4 and the first cage 61 of the bearing can be used, for example a sheath in which the first turn is inserted. In order to effectively cushion, a rubber is preferably used. strong hysteresis.
  • the second cage 62 of the bearing B is brought into contact, when the fastener is mounted or when the strut is mounted on the vehicle, with said elastic wedge 5.
  • the first cage 61 of the bearing has a suitable shape so that the fairly direct support of the spring 4 thereon does not interfere with the rolling of the balls 6. It has the appearance of an S, part of which serves as seat 610 for supporting the spring 4, and of which another part serves as a raceway 611 for the balls 6.
  • the second cage 62 is shaped in an approximate manner.
  • the raceway 611 comprises a slightly curved track, extended by a core 612 oriented substantially parallel to the axis of the bearing B. This core provides the bearing B with the rigidity necessary for the integration of the function usually provided by the first cage.
  • This core 612 is itself extended by a substantially radially oriented bearing surface, materializing the seat 610 of the spring 4.
  • a standard bearing can be used.
  • the cup will most often be independent of the bearing cage.
  • the cup can be pre-mounted on attachment A for a strut for a non-steerable wheel, or be applied under the bearing for a strut for a steerable wheel
  • first turn 41 of the spring 4 and the group of balls 6 of the bearing B are substantially coplanar
  • the first turn surrounds the balls 6 of the bearing B. This allows a great compactness of the attachment
  • the first turn of the spring 4, the balls 6 of the bearing B and the elastic joint 33 are all substantially coplanar (plane perpendicular to the axis of the rod of the jack), that is to say are all at the same level in the fastener.
  • the fastener A comprises a central frame 31 comprising a flange 31R and a central opening 15 cooperating with the rod 10
  • the top of the rod 10 is rigidly mounted on the central opening of said central frame 31, via a shoulder 14, thanks to a threaded rod 12 passing through the central frame 31 and receiving a nut 13.
  • the rod 10 "guides" the central frame 31 in the sense that its position in space is determined by the attitude of the rod
  • the central frame will therefore faithfully follow the vibrations of the rod, the vertical deflection of the rod due to the shock absorber, or even the deflection of the rod due to the turning of the wheels
  • the strut jack is positioned with a side of central frame 31
  • the fastener B also includes an external frame 32, comprising a mounting surface 320 for mounting on the body 2.
  • the fastener is rigidly fixed by direct support of the external frame 32 on the body 2, using screws 21.
  • the outer frame 32 has a central passage allowing access to the fixing of the rod 10 of the jack on the central frame 31.
  • the outer frame 32 has a flange 32R opposite the mounting surface 320.
  • the elastic articulation 33 is secured to an anchoring surface 321 arranged on said outer frame 32, and is secured to an anchoring surface 311 arranged on said central frame 31.
  • the anchoring surfaces are opposite from one another, and are substantially parallel to each other, when the fastener is seen in section as in the various figures.
  • the central frame 31 has a substantially truncated side wall, developing on the side of said central opening 15 opposite the side receiving the strut, that is to say the rod 10 of the jack.
  • the virtual top of the cone is located on the side of said central opening 15 receiving said strut.
  • the side wall reaches a maximum radial size at the upper edge 31R thereof. We see in Figure 3 the maximum diameter ⁇ M.
  • the radially outer face of said side wall comprises said anchoring surface 311 of the elastic joint 33
  • the external frame 32 includes an upper flange incorporating said mounting surface 320 on the body 2
  • the upper flange is here extended on the central side by a connecting wall, here a quasi-cylindrical wall 323 extending axially on the side opposite to said range mounting.
  • a connecting wall here a quasi-cylindrical wall 323 extending axially on the side opposite to said range mounting.
  • the frame exté ⁇ eure extends into a substantially frustoconical side wall comprising the anchoring surface 321 of the elastic joint 33
  • the passage left at the center of the external frame 32 is minimal at the bottom edge 32R of the external frame 32, said passage having to this level a minimum diameter ⁇ m
  • the diameter ⁇ M of the central reinforcement 31 is strictly greater than the diameter ⁇ m of the external reinforcement 32.
  • the anchoring surfaces of the elastic joint on said central reinforcement 31 and external 32 are substantially frustoconical and are oriented as shown in the different figures, i.e. point towards the strut, and not towards the vehicle body
  • said central frame 31 and outer frame 32 are shaped and positioned relative to each other so that a displacement of the central frame along the axis of said cylinder, in a direction away said cylinder of said mounting surface, brings said anchoring surfaces of the elastic articulation from one another, and shaped and positioned relative to one another so that the projection, parallel to the the axis of said cylinder, of said anchoring surface on the central frame is superimposed at least in part with the projection, parallel to the axis of said cylinder, of said anchoring surface on the external frame.
  • the end of the outer frame 32 opposite said mounting surface 320 has a flat 322 substantially perpendicular to the axis of the strut, in the extension of the flange 32R, here extending the flange 32R radially towards the largest radii .
  • the lower rim 32R is covered with a bead 34 of rubber protruding from the side opposite to the mounting surface.
  • a lower bowl 35 whose base is pierced to allow the head of the rod 10 of the jack to pass is mounted under the fastener.
  • the lower bowl 35 is oriented opposite the outer frame 32, that is to say that its concavity is opposite to the concavity of the central frame 31. This bowl 35 is designed to contain an impact stop 7.
  • the elastic joint 33 provides axial (the functional clearance described above allows) and radial filtering of the upper end of the rod 10 relative to the frame 32 , therefore relative to the chassis 2.
  • it allows the inclination of the rod 10 around a virtual center of rotation situated approximately at the intersection of the normals centered on the frustoconical bearing surfaces serving as anchoring of the elastic articulation 33 on said central 31 and outer 32 frames. As known, these movements are necessary for turning the wheels.
  • a filling 36 cooperates with the second cage 62 of the bearing B
  • this is made of the same material as the elastic joint. It is therefore a filling 36 of rubber, dimensioned to be in slight compression against the second cage 62 of the bearing B, so as to center it.
  • This filling 36 thus constitutes, by its cylindrical surface 360, a male part which can be inserted inside the bearing B, the second cage 62 of which looks like a suitable female part. Note that the role of this filling in the resumption of the bearing load B is negligible, this being transmitted by the second cage 62 directly on the elastic block 5 Centering can also be carried out on the radially outer wall of the elastic block 5
  • the first cage 61 As for the first cage 61, it is held in place for example by a sealing lip, as known per se, acting only to oppose the accidental separation of the cages during handling of the bearing during its mounting on the fastener and during the mounting of the clip in the strut.
  • the elastic wedge 5 is also secured to the underside of the flange of the outer frame 32.
  • the clip A incorporates the outside frame 32 and the central armature 31. This can be carried out in a single injection operation on the armatures previously adhered, making it possible to obtain, by a single overmolding on the external armature 32, both the filtering and the decoupling of the rod 10 of the jack (elastic joint 33), a support for the lower bowl containing the shock stop (bead 34), the rebound stop which is here integrated into the elastic joint 33 itself, and a second stage for filtering the spring (elastic shim 5) with a bearing surface 52, as well as a filling 36 for centering and retaining a cup, here the bearing B.
  • the second stage of filtering the spring 4 can be made from the same material Thanks to a judicious arrangement of the anchoring surfaces on the external and central armatures of the elastic joint 33, the examples illustrating the invention thus show that said surfaces play the role of anti-dismantling safety for the strut, which does not only is favorable to the cost price of the fastener thanks to the possible removal of an element, but also ensures greater compactness of the fastener.
  • the inclination of the anchoring surfaces having a truncated shape, still allows sufficient relative mobility of said contact surfaces, by elastically urging the elastomer block 33.
  • the elastic articulation plays its role of decoupling allowing the relative movement between the body and the strut, with substantially the same mobility as what is commonly encountered. Filtering skills are not affected.
  • the second and third variants have in common the inclination of the plane of the bearing B relative to the axis of the jack, said plane no longer being perpendicular to said axis as in FIG. 1, but being inclined by approximately 4 ° relative to at the perpendicular.
  • An inclination of about half of the inclination of the pivot axis relative to the axis of the jack seems favorable. In Figure 2, this is achieved by an elastic wedge 5 'bias. In Figure 4, we obtain this result because the support of the attachment to the body 2 'is itself inclined.
  • a spring 4 is shown, the first turn 41 of which is retremte with respect to the other turns.
  • the diameter of the second turn 42 is larger than the diameter of the first turn 41. This further improves the compactness, as shown in Figure 5.
  • the impact stop 7 visible in FIG. 5 is the same as that visible in the other figures, the compression by the body 11 having deformed it until it fills all the volume available inside the bowl 35.
  • the second turn 42 is also substantially in the same plane as the first turn 41, as the bearing B and as the elastic joint 33.
  • first turn 41 of the spring 4 is included axially between the mounting surface 320 and the flange 32R.
  • the second turn 42 is also included axially between the mounting surface 320 and the flange 32R.
  • the upper attachment A for the strut of a Mac Pherson suspension comprises an elastic articulation 33 for filtering and decoupling on the path of transmission of the forces from the shock absorber rod to the body 2, and an elastic shim 5 separate on the path of transmission of the forces from the spring 4 to the body 2.

Abstract

The invention concerns a coupling attachment (A) for a Mac Pherson suspension shock strut comprising an elastic articulation (33) filtering and uncoupling on the path transmitting the shock absorber rod efforts to the body (2), and a separate elastic block (5) on the path transmitting the spring (4) efforts to the body (2). Said device improves compactness without adversely affecting comfort.

Description

Attache supérieure de jambe MacPherson. MacPherson upper leg clip.
La présente invention concerne les jambes de force de suspensions de type Mac Pherson. Ces jambes de force contiennent un vérin et un ressort entourant le vérin. Le vérin assure un guidage transversal maintenant le porte-roue, et contient en général un amortisseur. L'invention concerne notamment les attaches qui constituent une pièce de filtrage et de liaison assurant l'ancrage sur la caisse de la partie supérieure des jambes de force Mac Pherson et qui, le cas échéant, procurent en outre un appui pour le ressort. Lorsqu'il s'agit de jambes de force pour roues directrices, un roulement assure le nécessaire degré de liberté de rotation entre le porte-roue et la surface d'appui sur la caisse.The present invention relates to the struts of Mac Pherson type suspensions. These struts contain a cylinder and a spring surrounding the cylinder. The cylinder provides transverse guidance holding the wheel carrier, and generally contains a shock absorber. The invention relates in particular to the fasteners which constitute a filtering and connecting piece ensuring the anchoring to the body of the upper part of the Mac Pherson struts and which, if necessary, also provide support for the spring. In the case of struts for steered wheels, a bearing provides the necessary degree of freedom of rotation between the wheel carrier and the bearing surface on the body.
Ces attaches comportent une articulation de filtrage et de découplage, appelée ici articulation élastique, sur le chemin de transmission des efforts de la tige du vérin à la caisse. Parfois, elles comportent encore une ou des cales élastiques distinctes de l'articulation élastique, sur le chemin de transmission des efforts du ressort à la caisse. Cette cale élastique distincte permet un filtrage indépendant des efforts transmis par le ressort et procure un meilleur confort. Ou bien le chemin de transmission des efforts du ressort à la caisse passe aussi par l'articulation élastique. Il existe de nombreuses variantes de réalisation de telles attaches. La présente invention ne se rapporte qu'aux jambes de force dans lesquelles l'effort transmis par la tige de l'amortisseur passe par l'articulation élastique et dans lesquelles la charge du véhicule ne passe pas par ladite articulation élastique.These fasteners include a filtering and decoupling joint, here called an elastic joint, on the path for transmitting the forces from the rod of the jack to the body. Sometimes, they also have one or more elastic shims separate from the elastic joint, on the path of transmission of the forces from the spring to the body. This separate elastic block allows independent filtering of the forces transmitted by the spring and provides better comfort. Or the path for transmitting the forces from the spring to the body also passes through the elastic articulation. There are many alternative embodiments of such fasteners. The present invention relates only to struts in which the force transmitted by the shock absorber rod passes through the elastic joint and in which the vehicle load does not pass through said elastic joint.
L'objectif de l'invention est d'améliorer la compacité des jambes de force, plus précisément la compacité de l'ensemble localisé dans la partie supérieure de la jambe de force, afin de laisser libre cours aux stylistes qui souhaitent dessiner des capots de plus en plus plongeant. Il est en effet avantageux d'avoir le moins possible de contraintes quant à l'encombrement des suspensions. Un autre objectif de l'invention est de diminuer le coût de revient de telles attaches, sans préjudice de leur qualité de filtrage des vibrations apparaissant lorsque le véhicule roule sur une chaussée. Ce filtrage est très important pour le confort des passagers.The objective of the invention is to improve the compactness of the struts, more precisely the compactness of the assembly located in the upper part of the strut, in order to give free rein to stylists who wish to design hoods for more and more plunging. It is indeed advantageous to have as few constraints as possible on the size of the suspensions. Another objective of the invention is to reduce the cost price of such fasteners, without prejudice to their quality of filtering out the vibrations appearing when the vehicle is traveling on a roadway. This filtering is very important for passenger comfort.
L'invention concerne une attache supérieure pour suspension Mac Pherson de véhicule, comportant • • une portée de montage sur la caisse du véhicule,The invention relates to a top attachment for Mac Pherson vehicle suspension, comprising : • a mounting range on the vehicle body,
• une portée d'appui et une portée de centrage pour une coupelle transmettant la charge statique supportée par ladite suspension, lesdites portée d'appui et portée de centrage définissant un logement pour monter ladite coupelle,A bearing surface and a centering surface for a cup transmitting the static load supported by said suspension, said bearing surface and centering surface defining a housing for mounting said cup,
• une ouverture centrale destiné à recevoir la tige d'une jambe de force ayant un corps et une tige coulissant dans ledit corps, l'ouverture centrale déterminant la position d'un axe autour duquel le corps tourne par rapport à la tige,A central opening intended to receive the rod of a strut having a body and a rod sliding in said body, the central opening determining the position of an axis around which the body rotates relative to the rod,
• une armature centrale comprenant d'un côté ladite ouverture centrale et de l'autre un rebord,A central frame comprising on one side said central opening and on the other a rim,
• une armature extérieure comprenant ladite portée de montage, ladite armature extérieure comportant un rebord entourant un orifice central,An external frame comprising said mounting surface, said external frame comprising a flange surrounding a central orifice,
• une cale élastique adhéπsée sur ladite armature extérieure du côté opposé a la portée de montage, la cale élastique comprenant ladite portée d'appui pour la coupelle,An elastic wedge adhered to said external frame on the side opposite to the mounting surface, the elastic wedge comprising said bearing surface for the cup,
• une articulation élastique en matériau élastoméπque, adhéπsée sur une surface d'ancrage aménagée sur l'armature extérieure d'une part et adhéπsée sur une surface d'ancrage (311) aménagée sur l'armature centrale d'autre part,An elastic articulation made of elastomeric material, adhered to an anchoring surface arranged on the external frame on the one hand and adhered to an anchoring surface (311) arranged on the central frame on the other hand,
Suivant un aspect de l'invention, ladite attache est telle que • According to one aspect of the invention, said fastener is such that •
• les armature centrale et armature extérieure sont conformées l'une par rapport à l'autre de telle sorte que l'armature centrale ne passe pas par l'orifice central,The central reinforcement and external reinforcement are shaped relative to each other so that the central reinforcement does not pass through the central orifice,
• les armature centrale et armature extérieure sont positionnées l'une par rapport à l'autre de telle sorte que l'armature extérieure entoure au moins partiellement l'armature centrale, et de telle sorte que les surfaces d'ancrage se superposent partiellement radialement, les surfaces d'ancrage étant décalées axialement,The central reinforcement and external reinforcement are positioned in relation to one another so that the external reinforcement at least partially surrounds the central reinforcement, and so that the anchoring surfaces partially overlap radially, the anchoring surfaces being axially offset,
• ladite portée d'appui et ladite portée de centrage pour la coupelle étant comprise axialement entre la portée de montage et le rebord.• said bearing surface and said centering surface for the cup being included axially between the mounting surface and the flange.
Suivant un autre aspect de l'invention, ladite attache est telle que ladite cale élastique est constituée d'un matériau élastomérique dépourvu de renfort métallique dans son épaisseur comprise entre la portée de montage et la portée d'appui pour le roulement.According to another aspect of the invention, said fastener is such that said elastic shim is made of an elastomeric material devoid of metal reinforcement in its thickness between the mounting surface and the bearing surface for the bearing.
Suivant un autre aspect de l'invention, ladite attache est telle queAccording to another aspect of the invention, said fastener is such that
• les armature centrale et armature extérieure sont positionnées l'une par rapport à l'autre de telle sorte que l'armature extérieure entoure au moins partiellement l'armature centrale, et de telle sorte que les surfaces d'ancrage se superposent partiellement radialement, les surfaces d'ancrage étant décalées axialement,The central reinforcement and external reinforcement are positioned in relation to each other so that the external reinforcement at least partially surrounds the central reinforcement, and such that the anchor surfaces partially overlap radially, the anchor surfaces being axially offset,
• l'armature centrale comporte une paroi latérale sensiblement troncomque se développant du côté de ladite ouverture centrale opposé au côté recevant la jambe de force, le sommet virtuel du cône étant situé du côté de ladite ouverture centrale recevant la jambe de force, ladite paroi latérale ayant un diamètre maximal φM, la face radialement extérieure de ladite paroi latérale comportant ladite surface d'ancrage de l'articulation élastique,The central frame has a substantially truncated side wall developing on the side of said central opening opposite the side receiving the strut, the virtual apex of the cone being located on the side of said central opening receiving the strut, said side wall having a maximum diameter φ M , the radially outer face of said side wall comprising said anchoring surface of the elastic joint,
• l'armature extérieure comporte un flasque supérieur incorporant ladite portée de montage sur la caisse, ledit flasque étant prolongé par une paroi latérale sensiblement troncomque comportant la surface d'ancrage de l'articulation élastique, ladite paroi latérale sensiblement troncomque s'étendant axialement du côté opposé à ladite portée de montage, ladite paroi sensiblement troncomque ayant un diamètre minimal φm, avec φM strictement supérieur à φm • the outer frame includes an upper flange incorporating said mounting surface on the body, said flange being extended by a substantially truncated side wall comprising the anchoring surface of the elastic joint, said substantially truncated side wall extending axially from side opposite to said mounting surface, said substantially truncated wall having a minimum diameter φ m , with φ M strictly greater than φ m
C'est par référence à l'axe défini par l'ouverture centrale que l'on définit les directions axiales (parallèles à l'axe) et radiales (perpendiculaire à l'axe). L'ouverture centrale définit géométriquement parfaitement le montage de la jambe de force sur l'attache car c'est une zone par laquelle l'une des armatures s'appuie sur la tige de la jambe de force ; il n'y a aucun degré de liberté entre la tige et ladite armature.It is by reference to the axis defined by the central opening that the axial (parallel to the axis) and radial (perpendicular to the axis) directions are defined. The central opening geometrically perfectly defines the mounting of the strut on the fastener because it is an area through which one of the frames rests on the strut rod; there is no degree of freedom between the rod and said frame.
L'attache proposée remplit les fonctions d'articulation autorisant des mouvements de la jambe de force autour de l'axe de braquage lorsque l'attache est utilisée pour une roue directrice. Dans toutes les utilisations, elle remplit les fonctions de filtrage du ressort par la cale élastique, et de filtrage de l'amortisseur par l'articulation. On sait que ce type de suspension comporte en général une butée dite de choc : c'est un bloc d'élastomère contre lequel frappe le corps de l'amortisseur lorsque la suspension vient en butée de débattement. L'invention permet une implantation avantageuse de ladite butée de choc. Dans ce cas, la suspension comprend un bol monté sur la tige et contenant au moins partiellement une butée de choc concentrique à la jambe de force, ledit bol étant en contact avec ladite ouverture centrale de ladite armature centrale, ledit bol comportant une surface d'appui dans le prolongement axial du rebord de l' armature extérieure.The proposed attachment fulfills the articulation functions allowing movements of the strut around the turning axis when the attachment is used for a steering wheel. In all uses, it fulfills the functions of filtering the spring by the elastic shim, and filtering the shock absorber by the articulation. We know that this type of suspension generally includes a so-called shock stop: it is an elastomer block against which the body of the shock absorber strikes when the suspension comes into travel stop. The invention allows an advantageous implantation of said impact stop. In this case, the suspension comprises a bowl mounted on the rod and containing at least partially an impact stop concentric to the strut, said bowl being in contact with said central opening of said central frame, said bowl having a surface of support in the axial extension of the rim of the external frame.
L'invention permet de faire transiter la charge transmise à la caisse par la butée de choc sans passer m par l'articulation, ni par le roulement dans le cas d'une utilisation en roues directrices En effet, les chocs, même filtrés par la butée de choc, sont préjudiciables à la bonne tenue du roulement, et l'articulation élastique de ce type d'attache n'est pas conçue pour reprendre des charges importantes car la charge du ressort ne transite pas par ladite articulation.The invention makes it possible to pass the load transmitted to the body through the impact stop without passing m through the articulation, or through the bearing in the case of use on steered wheels. Indeed, shocks, even filtered by the shock stop, are detrimental to the good behavior of the bearing, and the elastic articulation of this type of fastener is not designed to take up large loads because the load of the spring does not does not pass through said joint.
Le logement que l' invention permet d'aménager permet de disposer la première spire du ressort, et le cas échéant le roulement, sensiblement dans le même plan perpendiculaire à l'axe que ladite articulation Selon cet aspect de l'invention, la suspension comporte un ressort dont la première spire est comprise axialement entre la portée de montage et le rebord de l'armature extérieure, ou bien, dans le cas de roues directrices, comporte un ressort et un roulement dont l'une des cages constitue ladite coupelle ou est en appui sur ladite coupelle, le roulement étant compris axialement entre la portée de montage et le rebord, et dont l'autre des cages tourne avec le ressort pour suivre l'orientation des roues directricesThe housing that the invention allows to arrange allows to have the first turn of the spring, and if necessary the bearing, substantially in the same plane perpendicular to the axis as said articulation. According to this aspect of the invention, the suspension comprises a spring, the first turn of which is included axially between the mounting surface and the edge of the outer frame, or else, in the case of steered wheels, comprises a spring and a bearing, one of the cages of which constitutes said cup or is resting on said cup, the bearing being included axially between the mounting surface and the flange, and the other of the cages of which rotates with the spring to follow the orientation of the steered wheels
L' invention permet de diminuer le nombre de pièces constitutives de l'ancrage supérieur de la jambe de force sur la caisse du véhicule. Elle permet d'implanter un roulement très haut, à la même hauteur que l'articulation élastique. Ainsi, le roulement ne cause aucune surépaisseur par rapport à l'attache elle-même. L'encombrement en hauteur de l'attache est dicté seulement par les proportions de l'articulation élastique assurant le découplage entre la tige du vérin de la jambe de force et la caisse du véhicule, ainsi que le filtrage assurant notamment un meilleur confort acoustique.The invention makes it possible to reduce the number of parts constituting the upper anchoring of the strut on the vehicle body. It allows a very high bearing to be installed, at the same height as the elastic joint. Thus, the bearing does not cause any excess thickness relative to the fastener itself. The overall height of the fastener is dictated only by the proportions of the elastic articulation ensuring the decoupling between the rod of the strut jack and the vehicle body, as well as the filtering ensuring in particular better acoustic comfort.
L'invention sera mieux comprise par la descπption d'exemples donnés à titre non limitatif. Une caractéristique non limitative de ces exemples réside dans le fait que la seconde cage du roulement vient en appui chaque fois directement sur une cale élastique solidaire de ladite armature extérieure.The invention will be better understood from the description of examples given without implied limitation. A non-limiting characteristic of these examples resides in the fact that the second bearing cage comes to bear each time directly on an elastic shim secured to said external frame.
Dans le dessin annexé, les figures montrent un ensemble, un roulement et une attache selon l'invention, selon différentes variantes.In the accompanying drawing, the figures show an assembly, a bearing and a fastener according to the invention, according to different variants.
La figure 1 montre une première variante ; la figure 2 montre une seconde variante se distinguant de la première par la façon dont le roulement est supporté ; la figure 3 montre un éclaté de cette seconde variante ; la figure 4 montre une troisième variante dans laquelle le logement de l'attache sur la caisse du véhicule est différent ; la figure 5 montre la troisième variante dans une configuration en butée de débattement.Figure 1 shows a first variant; Figure 2 shows a second variant distinguished from the first by the way the bearing is supported; Figure 3 shows an exploded view of this second variant; Figure 4 shows a third variant in which the housing of the fastener on the vehicle body is different; Figure 5 shows the third variant in a configuration in travel stop.
On voit aux différentes figures une jambe de force 1 d'une suspension de roue de type Mac Pherson, dont on voit en particulier la tige 10 du vérin. On voit aussi l'axe XX' de la tige 10. La tige 10 coulisse dans un corps 11 auquel est relié un porte roue (non représenté). Dans une telle jambe de force, l'effort d'amortissement s'oppose au mouvement relatif de la tige 10 et du corps 11 On voit partiellement la caisse 2 du véhicule. L'attache A est l'organe permettant à la fois le montage de la jambe de force 1 sur la caisse 2 et le filtrage des vibrations de roulage, et qui autorise un certain débattement du vérin par rapport à la caisse 2. L'attache A est en liaison fonctionnelle avec d'autres éléments par les parties suivantes :We see in the different figures a strut 1 of a Mac Pherson type wheel suspension, which we see in particular the rod 10 of the jack. We also see the axis XX 'of the rod 10. The rod 10 slides in a body 11 to which is connected a wheel carrier (not shown). In such a strut, the damping force is opposed to the relative movement of the rod 10 and of the body 11 The body 2 of the vehicle is partially seen. The fastener A is the member allowing both the mounting of the strut 1 on the body 2 and the filtering of rolling vibrations, and which allows a certain movement of the jack relative to the body 2. The fastener A is in functional connection with other elements by the following parts:
• une portée de montage 320 sur la caisse,• a mounting range 320 on the body,
• une portée d'appui 52 pour une coupelle (ici la coupelle est l'une des cages du roulement B, ce qui correspond à une mode particulier de réalisation) transmettant la charge vue par le ressort 4 à la caisse 2,A bearing surface 52 for a cup (here the cup is one of the cages of the bearing B, which corresponds to a particular embodiment) transmitting the load seen by the spring 4 to the body 2,
• une portée de centrage de ladite coupelle, ici la face cylindrique 360,A centering surface of said cup, here the cylindrical face 360,
• et enfin une ouverture centrale 15, permettant de centrer la tige 10 sur l'attache, et de l'immobiliser par rapport à certains organes de l'attache comme on le comprendra ci-dessous.• and finally a central opening 15, allowing the rod 10 to be centered on the fastener, and to immobilize it relative to certain members of the fastener as will be understood below.
Une autre liaison fonctionnelle, cette fois optionnelle, est assurée par un bourrelet de caoutchouc 34 permettant à l'attache de coopérer avec la butée de choc, comme explicité ci-dessous.Another functional connection, this time optional, is provided by a rubber bead 34 allowing the fastener to cooperate with the impact stop, as explained below.
On voit aussi un ressort 4 déterminant la flexibilité de la suspension. Une articulation élastique 33 assure la liaison de la tige 10 à la caisse tout en autorisant un certain mouvement relatif entre la caisse 2 et la tige 10. On voit également un roulement B, car l'invention est illustrée dans son application aux roues directrices.We also see a spring 4 determining the flexibility of the suspension. An elastic articulation 33 ensures the connection of the rod 10 to the body while allowing a certain relative movement between the body 2 and the rod 10. We also see a bearing B, because the invention is illustrated in its application to the steered wheels.
Détaillons d'abord l'appui du ressort 4 sur la caisse 2. L'attache A comporte une cale élastique 5 indépendante de l'articulation élastique 33. La cale élastique 5, réalisée de préférence en matériau élastoméπque, est insérée sur le chemin de transmission des efforts d'appui du ressort 4 sur la caisse 2 du véhicule. Comme il s'agit d'une jambe de force pour roues directrices, un roulement B dont on voit les billes 6 est intercalé entre le ressort 4 et la cale 5. La coupelle supérieure du ressort et la première cage 61 du roulement B forment ici une seule et même pièce. La première spire 41 du ressort 4 est sensiblement plane, et repose sur un coussin 60, lui aussi de préférence en matériau élastoméπque. Ce coussin 60 permet de bien répartir la charge du ressort 4 sur la périphérie de la première cage 61, tout au moins sur un arc d'appui prédimensionné Ledit coussin 60 procure aussi un premier étage d'amortissement atténuant les vibrations du ressort 4 De façon plus générale, on peut utiliser toute forme de coussin inséré entre la première spire du ressort 4 et la première cage 61 du roulement, par exemple un fourreau dans lequel la première spire est insérée Afin d'amortir efficacement, on utilise de préférence un caoutchouc à forte hystérèse.First detail the support of the spring 4 on the body 2. The fastener A comprises an elastic block 5 independent of the elastic joint 33. The elastic block 5, preferably made of elastomeric material, is inserted on the path transmission of the support forces of the spring 4 on the body 2 of the vehicle. As it is a strut for steered wheels, a bearing B whose balls 6 can be seen is interposed between the spring 4 and the shim 5. The upper cup of the spring and the first cage 61 of the bearing B form here one and the same room. The first turn 41 of the spring 4 is substantially flat, and rests on a cushion 60, which is also preferably made of elastomeric material. This cushion 60 makes it possible to distribute the load of the spring 4 well on the periphery of the first cage 61, at least on a pre-dimensioned support arc. Said cushion 60 also provides a first damping stage attenuating the vibrations of the spring 4. more generally, any form of cushion inserted between the first turn of the spring 4 and the first cage 61 of the bearing can be used, for example a sheath in which the first turn is inserted. In order to effectively cushion, a rubber is preferably used. strong hysteresis.
Revenons à la description du roulement B. La seconde cage 62 du roulement B est mise en contact, au montage de l'attache ou au montage de la jambe de force sur le véhicule, avec ladite cale élastique 5. La première cage 61 du roulement présente une forme adaptée pour que l'appui assez direct du ressort 4 sur celle-ci ne contrarie pas le roulement des billes 6. Elle a l'allure d'un S dont une partie sert de siège 610 d'appui au ressort 4, et dont une autre partie sert de chemin de roulement 611 des billes 6. La seconde cage 62 est conformée de façon approchante. Le chemin de roulement 611 comporte une piste légèrement incurvée, prolongée par une âme 612 orientée sensiblement parallèlement à l'axe du roulement B. Cette âme procure au roulement B la rigidité nécessaire à l'intégration à la première cage de la fonction procurée usuellement par la coupelle Cette âme 612 est elle-même prolongée par une portée orientée sensiblement radialement, matérialisant le siège 610 du ressort 4. Bien entendu, on peut utiliser un roulement standard. Dans ce cas, la coupelle sera le plus souvent indépendante de la cage du roulement. La coupelle peut être prémontée sur l'attache A pour une jambe de force pour roue non directrice, ou être appliquée sous le roulement pour une jambe de force pour roue directriceReturning to the description of the bearing B. The second cage 62 of the bearing B is brought into contact, when the fastener is mounted or when the strut is mounted on the vehicle, with said elastic wedge 5. The first cage 61 of the bearing has a suitable shape so that the fairly direct support of the spring 4 thereon does not interfere with the rolling of the balls 6. It has the appearance of an S, part of which serves as seat 610 for supporting the spring 4, and of which another part serves as a raceway 611 for the balls 6. The second cage 62 is shaped in an approximate manner. The raceway 611 comprises a slightly curved track, extended by a core 612 oriented substantially parallel to the axis of the bearing B. This core provides the bearing B with the rigidity necessary for the integration of the function usually provided by the first cage. the cup This core 612 is itself extended by a substantially radially oriented bearing surface, materializing the seat 610 of the spring 4. Of course, a standard bearing can be used. In this case, the cup will most often be independent of the bearing cage. The cup can be pre-mounted on attachment A for a strut for a non-steerable wheel, or be applied under the bearing for a strut for a steerable wheel
On constate que la première spire 41 du ressort 4 et le groupe de billes 6 du roulement B sont sensiblement coplanaires La première spire entoure les billes 6 du roulement B. Cela permet une grande compacité de l'attache La première spire du ressort 4, les billes 6 du roulement B et l'articulation élastique 33 sont toutes sensiblement coplanaires (plan perpendiculaire à l'axe de la tige du vérin), c'est à dire sont toutes au même niveau dans l'attache.It is noted that the first turn 41 of the spring 4 and the group of balls 6 of the bearing B are substantially coplanar The first turn surrounds the balls 6 of the bearing B. This allows a great compactness of the attachment The first turn of the spring 4, the balls 6 of the bearing B and the elastic joint 33 are all substantially coplanar (plane perpendicular to the axis of the rod of the jack), that is to say are all at the same level in the fastener.
Poursuivons par la description de tous les éléments en contact de part et d'autre avec l'articulation élastique 33 L' attache A comporte une armature centrale 31 comportant un rebord 31R et une ouverture centrale 15 coopérant avec la tige 10 Le sommet de la tige 10 est monté rigidement sur l'ouverture centrale de ladite armature centrale 31, via un épaulement 14, grâce à une tige filetée 12 traversant l'armature centrale 31 et recevant un écrou 13. Ainsi, la tige 10 « guide » l'armature centrale 31 au sens où la position de celle-ci dans l'espace est déterminée par l'attitude de la tige L'armature centrale va donc suivre fidèlement les vibrations de la tige, le débattement vertical de la tige dû à l'amortisseur, voire le débattement de la tige dû au braquage des roues Le vérin de la jambe de force est positionné d'un côté de l'armature centrale 31Let's continue with the description of all the elements in contact on both sides with the elastic joint 33 The fastener A comprises a central frame 31 comprising a flange 31R and a central opening 15 cooperating with the rod 10 The top of the rod 10 is rigidly mounted on the central opening of said central frame 31, via a shoulder 14, thanks to a threaded rod 12 passing through the central frame 31 and receiving a nut 13. Thus, the rod 10 "guides" the central frame 31 in the sense that its position in space is determined by the attitude of the rod The central frame will therefore faithfully follow the vibrations of the rod, the vertical deflection of the rod due to the shock absorber, or even the deflection of the rod due to the turning of the wheels The strut jack is positioned with a side of central frame 31
L'attache B comporte aussi une armature extérieure 32, comportant une portée 320 de montage sur la caisse 2. L'attache est fixée rigidement par appui direct de l'armature extérieure 32 sur la caisse 2, grâce à des vis 21. L'armature extérieure 32 comporte un passage central laissant accès à la fixation de la tige 10 du vérin sur l'armature centrale 31. L'armature extérieure 32 comporte un rebord 32R à l'opposé de la portée de montage 320. L'articulation élastique 33, avantageusement réalisée en matériau élastoméπque, est solidaire d'une surface d'ancrage 321 aménagée sur ladite armature extérieure 32, et est solidaire d'une surface d'ancrage 311 aménagée sur ladite armature centrale 31. Les surfaces d'ancrage sont en regard l'une de l'autre, et sont sensiblement parallèles l'une de l'autre, lorsque l'attache est vue en coupe comme aux différentes figures.The fastener B also includes an external frame 32, comprising a mounting surface 320 for mounting on the body 2. The fastener is rigidly fixed by direct support of the external frame 32 on the body 2, using screws 21. The outer frame 32 has a central passage allowing access to the fixing of the rod 10 of the jack on the central frame 31. The outer frame 32 has a flange 32R opposite the mounting surface 320. The elastic articulation 33 , advantageously made of elastoméπque material, is secured to an anchoring surface 321 arranged on said outer frame 32, and is secured to an anchoring surface 311 arranged on said central frame 31. The anchoring surfaces are opposite from one another, and are substantially parallel to each other, when the fastener is seen in section as in the various figures.
L'armature centrale 31 comporte une paroi latérale sensiblement troncomque, se développant du côté de ladite ouverture centrale 15 opposé au côté recevant la jambe de force, c'est à dire la tige 10 du vérin. Le sommet virtuel du cône est situé du côté de ladite ouverture centrale 15 recevant ladite jambe de force. La paroi latérale atteint un encombrement radial maximal au rebord supérieur 31R de celle-ci. On aperçoit à la figure 3 le diamètre maximal φM. La face radialement extérieure de ladite paroi latérale comporte ladite surface d'ancrage 311 de l'articulation élastique 33The central frame 31 has a substantially truncated side wall, developing on the side of said central opening 15 opposite the side receiving the strut, that is to say the rod 10 of the jack. The virtual top of the cone is located on the side of said central opening 15 receiving said strut. The side wall reaches a maximum radial size at the upper edge 31R thereof. We see in Figure 3 the maximum diameter φ M. The radially outer face of said side wall comprises said anchoring surface 311 of the elastic joint 33
L'armature extérieure 32 comporte un flasque supérieur incorporant ladite portée de montage 320 sur la caisse 2 Le flasque supérieur est ici prolongé du côté central par une paroi de raccordement, ici une paroi quasi cylindrique 323 s'étendant axialement du côté opposé à ladite portée de montage. En ajustant la hauteur de ladite paroi quasi cylindrique 323, on peut adapter le positionnement de la portée de montage 320 au véhicule à équiper. Ensuite, l'armature extéπeure se prolonge en une paroi latérale sensiblement troncomque comportant la surface d'ancrage 321 de l'articulation élastique 33 Le passage laissé au centre de l'armature extérieure 32 est minimal au rebord inférieur 32R de l'armature extérieure 32, ledit passage ayant à ce niveau un diamètre minimal φm Le diamètre φM de l'armature centrale 31 est strictement supérieur au diamètre φm de l'armature extérieure 32. Les surfaces d'ancrage de l'articulation élastique sur lesdites armatures centrale 31 et extérieure 32 sont sensiblement tronconiques et sont orientées comme montré aux différentes figures, c'est à dire pointent vers la jambe de force, et non pas vers la caisse du véhiculeThe external frame 32 includes an upper flange incorporating said mounting surface 320 on the body 2 The upper flange is here extended on the central side by a connecting wall, here a quasi-cylindrical wall 323 extending axially on the side opposite to said range mounting. By adjusting the height of said quasi-cylindrical wall 323, the positioning of the mounting surface 320 can be adapted to the vehicle to be fitted. Then the frame extéπeure extends into a substantially frustoconical side wall comprising the anchoring surface 321 of the elastic joint 33 The passage left at the center of the external frame 32 is minimal at the bottom edge 32R of the external frame 32, said passage having to this level a minimum diameter φ m The diameter φ M of the central reinforcement 31 is strictly greater than the diameter φ m of the external reinforcement 32. The anchoring surfaces of the elastic joint on said central reinforcement 31 and external 32 are substantially frustoconical and are oriented as shown in the different figures, i.e. point towards the strut, and not towards the vehicle body
De la sorte, lesdites armature centrale 31 et armature extérieure 32 sont conformées et positionnées l'une par rapport à l'autre de telle sorte qu'un déplacement de l'armature centrale le long de l'axe dudit vérin, dans une direction éloignant ledit vérin de ladite portée de montage, rapproche lesdites surfaces d'ancrage de l'articulation élastique l'une de l'autre, et conformées et positionnées l'une par rapport à l'autre de telle sorte que la projection, parallèlement à l'axe dudit vérin, de ladite surface d'ancrage sur l'armature centrale se superpose au moins en partie avec la projection, parallèlement à l'axe dudit vérin, de ladite surface d'ancrage sur l'armature extérieure.In this way, said central frame 31 and outer frame 32 are shaped and positioned relative to each other so that a displacement of the central frame along the axis of said cylinder, in a direction away said cylinder of said mounting surface, brings said anchoring surfaces of the elastic articulation from one another, and shaped and positioned relative to one another so that the projection, parallel to the the axis of said cylinder, of said anchoring surface on the central frame is superimposed at least in part with the projection, parallel to the axis of said cylinder, of said anchoring surface on the external frame.
L'extrémité de l'armature extérieure 32 opposée à ladite portée de montage 320 comporte un méplat 322 sensiblement perpendiculaire à l'axe de la jambe de force, dans le prolongement du rebord 32R, ici prolongeant le rebord 32R radialement vers les plus grands rayons. Le rebord inférieur 32R est recouvert d'un bourrelet 34 de caoutchouc faisant protubérance du côté opposé à la portée de montage Un bol inférieur 35 dont la base est percée pour laisser passer la tête de la tige 10 du vérin est monté sous l'attache. Le bol inférieur 35 est orienté à l'opposé de l'armature extérieure 32, c'est à dire que sa concavité est opposée à la concavité de l'armature centrale 31. Ce bol 35 est conçu pour contenir une butée de choc 7. En dehors de sollicitations provenant de la tige 10 du vérin, il subsiste un jeu fonctionnel entre une surface d'appui 350 disposée sur la face extérieure du bol 35 et le bourrelet 34 de caoutchouc qui lui fait face. Cela permet de solliciter en cisaillement l'articulation élastique 33. L'articulation élastique 33 assure un filtrage axial (le jeu fonctionnel exposé ci-dessus le permet) et radial de l'extrémité supérieure de la tige 10 par rapport à l'armature 32, donc par rapport au châssis 2. De plus, elle autorise l'inclinaison de la tige 10 autour d'un centre de rotation virtuel situé environ à l'intersection des normales centrées sur les portées tronconiques servant d'ancrage de l'articulation élastique 33 sur lesdites armatures centrale 31 et extérieure 32. Comme connu, ces mouvements sont nécessaires au braquage des roues.The end of the outer frame 32 opposite said mounting surface 320 has a flat 322 substantially perpendicular to the axis of the strut, in the extension of the flange 32R, here extending the flange 32R radially towards the largest radii . The lower rim 32R is covered with a bead 34 of rubber protruding from the side opposite to the mounting surface. A lower bowl 35 whose base is pierced to allow the head of the rod 10 of the jack to pass is mounted under the fastener. The lower bowl 35 is oriented opposite the outer frame 32, that is to say that its concavity is opposite to the concavity of the central frame 31. This bowl 35 is designed to contain an impact stop 7. Apart from stresses coming from the rod 10 of the jack, there remains a functional clearance between a bearing surface 350 disposed on the outside face of the bowl 35 and the bead 34 of rubber which faces it. This makes it possible to apply shear stress to the elastic joint 33. The elastic joint 33 provides axial (the functional clearance described above allows) and radial filtering of the upper end of the rod 10 relative to the frame 32 , therefore relative to the chassis 2. In addition, it allows the inclination of the rod 10 around a virtual center of rotation situated approximately at the intersection of the normals centered on the frustoconical bearing surfaces serving as anchoring of the elastic articulation 33 on said central 31 and outer 32 frames. As known, these movements are necessary for turning the wheels.
Du côté radialement extérieur de la paroi quasi cylindrique de l'armature extérieure 32, c'est à dire du côté opposé à l'articulation élastique 33, un remplissage 36 coopère avec la seconde cage 62 du roulement B Très avantageusement, celui-ci est réalisé dans la même matière que l'articulation élastique. C'est donc un remplissage 36 en caoutchouc, dimensionné pour être en légère compression contre la seconde cage 62 du roulement B, de façon à la centrer. Ce remplissage 36 constitue ainsi par sa surface cylindrique 360 une pièce mâle qui peut être insérée à l'intérieur du roulement B, dont la seconde cage 62 a l'allure d'une pièce femelle adaptée. Notons que le rôle de ce remplissage dans la reprise de la charge du roulement B est négligeable, celle-ci étant transmise par la seconde cage 62 directement sur la cale élastique 5 Le centrage peut aussi être réalisé sur la paroi radialement extérieure de la cale élastique 5On the radially outer side of the almost cylindrical wall of the outer frame 32, that is to say on the side opposite to the elastic articulation 33, a filling 36 cooperates with the second cage 62 of the bearing B Very advantageously, this is made of the same material as the elastic joint. It is therefore a filling 36 of rubber, dimensioned to be in slight compression against the second cage 62 of the bearing B, so as to center it. This filling 36 thus constitutes, by its cylindrical surface 360, a male part which can be inserted inside the bearing B, the second cage 62 of which looks like a suitable female part. Note that the role of this filling in the resumption of the bearing load B is negligible, this being transmitted by the second cage 62 directly on the elastic block 5 Centering can also be carried out on the radially outer wall of the elastic block 5
Quant à la première cage 61, elle est maintenue en place par exemple par une lèvre d'étanchéité, comme connu en soi, agissant seulement pour s'opposer à la séparation accidentelle des cages lors des manipulations du roulement pendant son montage sur l'attache et pendant le montage de l'attache dans la jambe de force.As for the first cage 61, it is held in place for example by a sealing lip, as known per se, acting only to oppose the accidental separation of the cages during handling of the bearing during its mounting on the fastener and during the mounting of the clip in the strut.
La cale élastique 5 est également solidaire de la face inférieure du flasque de l'armature extérieure 32. A la figure 3, on voit l'attache A isolée des autres éléments de la suspension MacPherson L'attache A incorpore l'armature extérieure 32 et l'armature centrale 31. Celle-ci peut être réalisée en une seule opération d'injection sur les armatures préalablement adhéπsées, permettant d'obtenir, par un seul surmoulage sur l'armature extérieure 32, à la fois le filtrage et le découplage de la tige 10 du vérin (articulation élastique 33), un appui pour le bol inférieur contenant la butée de choc (bourrelet 34), la butée de rebond qui se trouve ici intégrée à l'articulation élastique 33 elle-même, et un second étage pour le filtrage du ressort (cale élastique 5) avec une surface d'appui 52, ainsi qu'un remplissage 36 pour centrer et retenir une coupelle, ici le roulement B. Il n'est pas nécessaire d'incorporer un renfort métallique sous la portée d'appui 52 recevant la coupelle (matérialisée ici par la seconde cage 62 du roulement) De préférence, on utilise un caoutchouc à faible hystérèse, le choix étant plutôt dicté par ce qui convient le mieux pour ladite articulation élastique 33. Le second étage de filtrage du ressort 4 peut être réalisé par le même matériau Grâce à une disposition judicieuse des surfaces d'ancrage sur les armatures extérieure et centrale de l'articulation élastique 33, les exemples illustrant l'invention montre ainsi que lesdites surfaces jouent le rôle de sécurité anti démontage pour la jambe de force, ce qui non seulement est favorable au coût de revient de l'attache grâce à la possible suppression d'un élément, mais en outre assure une plus grande compacité de l'attache. L'inclinaison des surfaces d'ancrage, ayant une allure troncomque, permet malgré tout une mobilité relative suffisante desdites surfaces de contact, en sollicitant élastiquement le bloc élastoméπque 33. L'articulation élastique joue son rôle de découplage permettant le mouvement relatif entre la caisse et la jambe de force, avec sensiblement la même mobilité que ce que l'on rencontre couramment. Les aptitudes de filtrage ne sont pas affectées.The elastic wedge 5 is also secured to the underside of the flange of the outer frame 32. In FIG. 3, we see the clip A isolated from the other elements of the MacPherson suspension The clip A incorporates the outside frame 32 and the central armature 31. This can be carried out in a single injection operation on the armatures previously adhered, making it possible to obtain, by a single overmolding on the external armature 32, both the filtering and the decoupling of the rod 10 of the jack (elastic joint 33), a support for the lower bowl containing the shock stop (bead 34), the rebound stop which is here integrated into the elastic joint 33 itself, and a second stage for filtering the spring (elastic shim 5) with a bearing surface 52, as well as a filling 36 for centering and retaining a cup, here the bearing B. It is not necessary to incorporate a metal reinforcement under the bearing surface 5 2 receiving the cup (materialized here by the second bearing cage 62) Preferably, a rubber with low hysteresis is used, the choice being rather dictated by what is best suited for said elastic articulation 33. The second stage of filtering the spring 4 can be made from the same material Thanks to a judicious arrangement of the anchoring surfaces on the external and central armatures of the elastic joint 33, the examples illustrating the invention thus show that said surfaces play the role of anti-dismantling safety for the strut, which does not only is favorable to the cost price of the fastener thanks to the possible removal of an element, but also ensures greater compactness of the fastener. The inclination of the anchoring surfaces, having a truncated shape, still allows sufficient relative mobility of said contact surfaces, by elastically urging the elastomer block 33. The elastic articulation plays its role of decoupling allowing the relative movement between the body and the strut, with substantially the same mobility as what is commonly encountered. Filtering skills are not affected.
Les deuxième et troisième variantes ont en commun l'inclinaison du plan du roulement B par rapport à l'axe du vérin, ledit plan n'étant plus perpendiculaire audit axe comme à la figure 1, mais étant incliné d'environ 4° par rapport à la perpendiculaire. Une inclinaison d'environ la moitié de l'inclinaison de l'axe de pivot par rapport à l'axe du vérin semble favorable. A la figure 2, on obtient cela grâce à une cale élastique 5' biaise. A la figure 4, on obtient ce résultat parce que l'appui de l'attache A la caisse 2' est lui-même incliné.The second and third variants have in common the inclination of the plane of the bearing B relative to the axis of the jack, said plane no longer being perpendicular to said axis as in FIG. 1, but being inclined by approximately 4 ° relative to at the perpendicular. An inclination of about half of the inclination of the pivot axis relative to the axis of the jack seems favorable. In Figure 2, this is achieved by an elastic wedge 5 'bias. In Figure 4, we obtain this result because the support of the attachment to the body 2 'is itself inclined.
Dans toutes les variantes, on a représenté un ressort 4 dont la première spire 41 est rétremte par rapport aux autres spires. Le diamètre de la seconde spire 42 est plus grand que le diamètre de la première spire 41. Cela améliore encore la compacité, comme la figure 5 permet de le comprendre. La butée de choc 7 visible à la figure 5 est la même que celle visible aux autres figure, la compression par le corps 11 l'ayant déformé jusqu'à ce qu'elle remplisse tout le volume disponible à l'intérieur du bol 35. Dans ce cas, en butée, on voit que la seconde spire 42 est aussi sensiblement dans le même plan que la première spire 41, que le roulement B et que l'articulation élastique 33. On voit à la même figure que le jeu entre le bol 35 et le bourrelet de caoutchouc 34 est annulé ce qui, compte tenu de la compression de la butée de choc 7, permet à la charge transmise par le corps 11 de se reporter pour l'essentiel directement sur l'armature extérieure 32 via le méplat 322, sans surcharger l'articulation élastique 33 et sans passer par le roulement B. Le méplat 322 forme un support destiné à recevoir la charge transmise par la butée de choc 7 solidaire de la tige de la jambe de force Ainsi, on voit que l'invention permet une grande compacité de l'attache A. La portée d'appui 52 (et même la portée de centrage) permettent de créer un logement pour la coupelle de transmission de la charge vue par le ressort, ledit logement étant compris axialement entre la portée de montage 320 et le rebord 32R. Il est même possible que la première spire 41 du ressort 4 soit comprise axialement entre la portée de montage 320 et le rebord 32R. En outre, en utilisant un ressort à première spire rétremte, il est aussi possible que, en compression maximale de la jambe de force, la deuxième spire 42 soit aussi comprise axialement entre la portée de montage 320 et le rebord 32R.In all the variants, a spring 4 is shown, the first turn 41 of which is retremte with respect to the other turns. The diameter of the second turn 42 is larger than the diameter of the first turn 41. This further improves the compactness, as shown in Figure 5. The impact stop 7 visible in FIG. 5 is the same as that visible in the other figures, the compression by the body 11 having deformed it until it fills all the volume available inside the bowl 35. In this case, in abutment, it can be seen that the second turn 42 is also substantially in the same plane as the first turn 41, as the bearing B and as the elastic joint 33. We see in the same figure as the play between the bowl 35 and the rubber bead 34 is canceled which, taking into account the compression of the impact stop 7, allows the load transmitted by the body 11 to be carried essentially directly on the external frame 32 via the flat 322, without overloading the elastic joint 33 and without passing through the bearing B. The flat 322 forms a support intended to receive the load transmitted by the impact stop 7 secured to the strut rod Thus, we see that the invention allows a great compactness of the fastener A. The bearing surface 52 (and even the centering surface) make it possible to create a housing for the load transmission cup seen by the spring, said housing being included axially between the mounting surface 320 and the flange 32R. It is even possible that the first turn 41 of the spring 4 is included axially between the mounting surface 320 and the flange 32R. In addition, by using a spring with a retracted first turn, it is also possible that, in maximum compression of the strut, the second turn 42 is also included axially between the mounting surface 320 and the flange 32R.
En résumé, l'attache A supérieure pour jambe de force d'une suspension Mac Pherson comporte une articulation élastique 33 de filtrage et de découplage sur le chemin de transmission des efforts de la tige d'amortisseur à la caisse 2, et une cale élastique 5 distincte sur le chemin de transmission des efforts du ressort 4 à la caisse 2. Cette disposition améliore compacité sans préjudice du confort. In summary, the upper attachment A for the strut of a Mac Pherson suspension comprises an elastic articulation 33 for filtering and decoupling on the path of transmission of the forces from the shock absorber rod to the body 2, and an elastic shim 5 separate on the path of transmission of the forces from the spring 4 to the body 2. This arrangement improves compactness without prejudice to comfort.

Claims

REVENDICATTONSCLAIM
1 Attache supérieure pour suspension Mac Pherson de véhicule, comportant :1 Top clip for Mac Pherson vehicle suspension, comprising:
• une portée de montage (320) sur la caisse du véhicule,• a mounting surface (320) on the vehicle body,
• une portée d'appui (52) et une portée de centrage (360) pour une coupelle (62) transmettant la charge statique supportée par ladite suspension, lesdites portée d'appui et portée de centrage définissant un logement pour monter ladite coupelle,A bearing surface (52) and a centering surface (360) for a cup (62) transmitting the static load supported by said suspension, said bearing surface and centering surface defining a housing for mounting said cup,
• une ouverture centrale (15) destiné à recevoir la tige (10) d'une jambe de force (1) ayant un corps (11) et une tige (10) coulissant dans ledit corps, l'ouverture centrale déterminant la position d'un axe (XX') autour duquel le corps tourne par rapport à la tige,• a central opening (15) intended to receive the rod (10) of a strut (1) having a body (11) and a rod (10) sliding in said body, the central opening determining the position of an axis (XX ') around which the body rotates relative to the rod,
• une armature centrale (31) comprenant d'un côté ladite ouverture centrale (15) et de l'autre un rebord (31R),A central frame (31) comprising on one side said central opening (15) and on the other a flange (31R),
• une armature extérieure (32) comprenant ladite portée de montage (320), ladite armature extérieure comportant un rebord (32R) entourant un orifice central,An outer frame (32) comprising said mounting surface (320), said outer frame comprising a flange (32R) surrounding a central orifice,
• une cale élastique (5) adhéπsée sur ladite armature extérieure (32) du côté opposé a la portée de montage (320), la cale élastique comprenant ladite portée d'appui pour la coupelle,An elastic wedge (5) adhered to said external frame (32) on the side opposite to the mounting surface (320), the elastic wedge comprising said bearing surface for the cup,
• une articulation élastique (33) en matériau élastoméπque, adhéπsée sur une surface d'ancrage aménagée (321) sur l'armature extérieure (32) d'une part et adhéπsée sur une surface d'ancrage (311) aménagée sur l'armature centrale (31) d'autre part, ladite attache étant telle que :• an elastic joint (33) made of elastomeric material, adhered to a fitted anchoring surface (321) on the external frame (32) on the one hand and adhered to an anchored surface (311) fitted to the frame central (31) on the other hand, said attachment being such that:
• les armature centrale (31) et armature extérieure (32) sont conformées l'une par rapport à l'autre de telle sorte que l'armature centrale ne passe pas par l'orifice central,The central frame (31) and external frame (32) are shaped relative to one another so that the central frame does not pass through the central orifice,
• les armature centrale (31) et armature extéπeure (32) sont positionnées l'une par rapport à l'autre de telle sorte que l'armature extéπeure entoure au moins partiellement l'armature centrale, et de telle sorte que les surfaces d'ancrage se superposent partiellement radialement, les surfaces d'ancrage étant décalées axialement,• the central frame (31) and outer frame (32) are positioned relative to each other so that the outer frame at least partially surrounds the central frame, and so that the surfaces of anchoring overlap partially radially, the anchoring surfaces being offset axially,
• ladite portée d'appui (52) et ladite portée de centrage pour la coupelle étant comprise axialement entre la portée de montage (320) et le rebord (32R).• said bearing surface (52) and said centering surface for the cup being included axially between the mounting surface (320) and the flange (32R).
2 Attache supérieure pour suspension Mac Pherson de véhicule, comportant :2 Upper clip for Mac Pherson vehicle suspension, comprising:
• une portée de montage (320) sur la caisse du véhicule, • une portée d'appui (52) et une portée de centrage (360) pour une coupelle (62) transmettant la charge du véhicule, lesdites portée d'appui et portée de centrage définissant un logement pour monter ladite coupelle,• a mounting surface (320) on the vehicle body, A bearing surface (52) and a centering surface (360) for a cup (62) transmitting the load of the vehicle, said bearing surface and centering surface defining a housing for mounting said cup,
• une ouverture centrale (15) destiné à recevoir la tige (10) d'une jambe de force (1) ayant un corps (11) et une tige (10) coulissant dans ledit corps, l'ouverture centrale déterminant la position d'un axe (XX') autour duquel le corps tourne par rapport à la tige,• a central opening (15) intended to receive the rod (10) of a strut (1) having a body (11) and a rod (10) sliding in said body, the central opening determining the position of an axis (XX ') around which the body rotates relative to the rod,
• une armature centrale (31) comprenant d'un côté ladite ouverture centrale (15) et de l'autre un rebord (31R),A central frame (31) comprising on one side said central opening (15) and on the other a flange (31R),
• une armature extérieure (32) comprenant ladite portée de montage (320), ladite armature extérieure comportant un rebord (32R) entourant un orifice central,An outer frame (32) comprising said mounting surface (320), said outer frame comprising a flange (32R) surrounding a central orifice,
• une cale élastique (5) adhéπsée sur ladite armature extérieure (32) du côté opposé à la portée de montage (320), la cale élastique comprenant ladite portée d'appui pour la coupelle, ladite cale élastique étant constituée d'un matériau élastoméπque dépourvu de renfort métallique dans son épaisseur comprise entre la portée de montage (320) et la portée d'appui pour le roulement,• an elastic wedge (5) adhered to said external frame (32) on the side opposite to the mounting surface (320), the elastic wedge comprising said bearing surface for the cup, said elastic wedge being made of an elastomeric material devoid of metal reinforcement in its thickness between the mounting surface (320) and the bearing surface for the bearing,
• une articulation élastique (33) en matériau élastoméπque, adhéπsée sur une surface d'ancrage aménagée (321) sur l'armature extérieure (32) d'une part et adhéπsée sur une surface d'ancrage (311) aménagée sur l'armature centrale (31) d'autre part.• an elastic joint (33) made of elastomeric material, adhered to a fitted anchoring surface (321) on the external frame (32) on the one hand and adhered to an anchored surface (311) fitted to the frame central (31) on the other hand.
3 Attache selon la revendication 1 ou 2, dans laquelle le rebord (31R) est situé axialement par rapport à l'ouverture centrale du côté opposé au côté destiné à recevoir la tige de la jambe de force3 fastener according to claim 1 or 2, wherein the flange (31R) is located axially relative to the central opening on the side opposite to the side intended to receive the strut of the strut
4 Attache selon l'une des revendications 1 à 3, dans laquelle la surface d'ancrage sur l'armature extérieure (32) se prolonge axialement de façon plus distante de la portée de montage de l'armature extérieure que la surface d'ancrage sur l'armature centrale (31).4 fastener according to one of claims 1 to 3, wherein the anchoring surface on the outer frame (32) extends axially more distant from the mounting surface of the outer frame than the anchoring surface on the central frame (31).
5 Attache selon l'une des revendications 1 à 4, dans laquelle5 fastener according to one of claims 1 to 4, wherein
• l'armature centrale (31) comporte une paroi latérale sensiblement troncomque se développant du côté de ladite ouverture centrale (15) opposé au côté recevant la jambe de force, le sommet virtuel du cône étant situé du côté de ladite ouverture centrale (15) recevant la jambe de force, ladite paroi latérale ayant un diamètre maximal (φM), la face radialement extérieure de ladite paroi latérale comportant ladite surface d'ancrage (311) de l'articulation élastique, • l'armature extérieure comporte un flasque supérieur incorporant ladite portée de montage sur la caisse, ledit flasque étant prolongé par une paroi latérale sensiblement troncomque comportant la surface d'ancrage (321) de l'articulation élastique, ladite paroi latérale sensiblement troncomque s 'étendant axialement du côté opposé à ladite portée de montage, ladite paroi sensiblement troncomque ayant un diamètre minimal (φm), avec φM strictement supérieur à φm.• the central frame (31) has a substantially frustoconical side wall developing on the side of said central opening (15) opposite the side receiving the strut, the virtual apex of the cone being located on the side of said central opening (15) receiving the strut, said side wall having a maximum diameter (φ M ), the radially outer face of said side wall comprising said anchoring surface (311) of the elastic joint, • the outer frame includes an upper flange incorporating said mounting surface on the body, said flange being extended by a substantially truncated side wall comprising the anchoring surface (321) of the elastic joint, said substantially truncated side wall extending axially on the side opposite to said mounting surface, said substantially truncated wall having a minimum diameter (φ m ), with φ M strictly greater than φ m .
6 Attache supérieure pour suspension Mac Pherson de véhicule, comportant :6 Upper bracket for Mac Pherson vehicle suspension, comprising:
• une portée de montage (320) sur la caisse du véhicule,• a mounting surface (320) on the vehicle body,
• une portée d'appui (52) et une portée de centrage (360) pour une coupelle (62) transmettant la charge du véhicule, lesdites portée d'appui et portée de centrage définissant un logement pour monter ladite coupelle,A bearing surface (52) and a centering surface (360) for a cup (62) transmitting the load of the vehicle, said bearing surface and centering surface defining a housing for mounting said cup,
• une ouverture centrale (15) destiné à recevoir la tige (10) d'une jambe de force (1) ayant un corps (11) et une tige (10) coulissant dans ledit corps, l'ouverture centrale déterminant la position d'un axe (XX') autour duquel le corps tourne par rapport à la tige,• a central opening (15) intended to receive the rod (10) of a strut (1) having a body (11) and a rod (10) sliding in said body, the central opening determining the position of an axis (XX ') around which the body rotates relative to the rod,
• une armature centrale (31) comprenant d'un côté ladite ouverture centrale (15) et de l'autre un rebord (31R),A central frame (31) comprising on one side said central opening (15) and on the other a flange (31R),
• une armature extérieure (32) comprenant ladite portée de montage (320), ladite armature extérieure comportant un rebord (32R) entourant un orifice central,An outer frame (32) comprising said mounting surface (320), said outer frame comprising a flange (32R) surrounding a central orifice,
• une cale élastique (5) adhéπsée sur ladite armature extérieure (32) du côté opposé a la portée de montage (320), la cale élastique comprenant ladite portée d'appui pour le roulement,An elastic wedge (5) adhered to said external frame (32) on the side opposite to the mounting surface (320), the elastic wedge comprising said bearing surface for the bearing,
• une articulation élastique (33) en matéπau élastoméπque, adhéπsée sur une surface d'ancrage aménagée (321) sur l'armature extérieure (32) d'une part et adhéπsée sur une surface d'ancrage (311) aménagée sur l'armature centrale (31) d'autre part, ladite attache étant telle que :• an elastic joint (33) made of elastomeric material, adhered to a fitted anchoring surface (321) on the external frame (32) on the one hand and adhered to an anchored surface (311) fitted to the frame central (31) on the other hand, said attachment being such that:
• les armature centrale (31) et armature extérieure (32) sont positionnées l'une par rapport à l'autre de telle sorte que l'armature extérieure entoure au moins partiellement l'armature centrale, et de telle sorte que les surfaces d'ancrage se superposent partiellement radialement, les surfaces d'ancrage étant décalées axialement,• the central frame (31) and outer frame (32) are positioned relative to each other so that the outer frame at least partially surrounds the central frame, and so that the surfaces of anchoring overlap partially radially, the anchoring surfaces being offset axially,
• l'armature centrale (31) comporte une paroi latérale sensiblement troncomque se développant du côté de ladite ouverture centrale (15) opposé au côté recevant la jambe de force, le sommet virtuel du cône étant situé du côté de ladite ouverture centrale (15) recevant la jambe de force, ladite paroi latérale ayant un diamètre maximal (φM), la face radialement extérieure de ladite paroi latérale comportant ladite surface d'ancrage (311) de l'articulation élastique, • l'armature extéπeure comporte un flasque supérieur incorporant ladite portée de montage sur la caisse, ledit flasque étant prolongé par une paroi latérale sensiblement troncomque comportant la surface d'ancrage (321) de l'articulation élastique, ladite paroi latérale sensiblement troncomque s'étendant axialement du côté opposé à ladite portée de montage, ladite paroi sensiblement troncomque ayant un diamètre minimal (φm), avec φM strictement supérieur à φm • the central frame (31) has a substantially frustoconical side wall developing on the side of said central opening (15) opposite the side receiving the strut, the virtual apex of the cone being located on the side of said central opening (15) receiving the leg by force, said side wall having a maximum diameter (φ M ), the radially outer face of said side wall comprising said anchoring surface (311) of the elastic joint, • the external reinforcement comprises an upper flange incorporating said bearing for mounting on the body, said flange being extended by a substantially truncated side wall comprising the anchoring surface (321) of the elastic joint, said substantially truncated side wall extending axially on the side opposite to said mounting surface, said substantially truncated wall with a minimum diameter (φ m ), with φ M strictly greater than φ m
7 Attache selon la revendication 2 ou 6, dans laquelle ladite portée d'appui (52) et ladite portée de centrage pour la coupelle est comprise axialement entre la portée de montage (320) et le rebord (32R)7 fastener according to claim 2 or 6, wherein said bearing surface (52) and said centering surface for the cup is axially between the mounting surface (320) and the flange (32R)
8 Attache selon la revendication 2, 6 ou 7, dans laquelle les armature centrale (31) et armature extérieure (32) sont conformées l'une par rapport à l'autre de telle sorte que l'armature centrale ne passe pas par l'orifice central8 fastener according to claim 2, 6 or 7, wherein the central frame (31) and outer frame (32) are shaped relative to each other so that the central frame does not pass through the central hole
9 Attache selon l'une des revendications 1 à 8, dans laquelle l'extrémité de l'armature extérieure opposée à ladite portée de montage comporte un méplat (322) sensiblement perpendiculaire à l'axe de la jambe de force, dans le prolongement du rebord (32R), orienté radialement vers l'extérieur, ledit méplat formant un support destiné à recevoir la charge transmise par une butée de choc solidaire de la tige de la jambe de force.9 fastener according to one of claims 1 to 8, wherein the end of the outer frame opposite to said mounting surface comprises a flat (322) substantially perpendicular to the axis of the strut, in the extension of the rim (32R), oriented radially outwards, said flat forming a support intended to receive the load transmitted by a shock stop secured to the strut of the strut.
10 Attache selon l'une des revendications 1 à 9, dans laquelle le rebord (32R) est recouvert d'un bourrelet (34) de caoutchouc faisant protubérance axialement du côté opposé à la portée de montage.10 Fastener according to one of claims 1 to 9, wherein the flange (32R) is covered with a bead (34) of rubber protruding axially on the side opposite to the mounting surface.
11 Suspension de type Mac Pherson comprenant une attache selon l'une des revendications 1 à 10, comportant un bol (35) monté sur la tige (10) et contenant au moins partiellement une butée de choc (7) concentrique à la jambe de force, ledit bol (35) étant en contact avec ladite ouverture centrale (15) de ladite armature centrale (31), ledit bol comportant une surface d'appui dans le prolongement axial du rebord (32R) de l'armature extérieure (32). 11 Mac Pherson type suspension comprising a fastener according to one of claims 1 to 10, comprising a bowl (35) mounted on the rod (10) and containing at least partially a shock stop (7) concentric with the strut , said bowl (35) being in contact with said central opening (15) of said central frame (31), said bowl having a bearing surface in the axial extension of the rim (32R) of the outer frame (32).
12 Suspension de type Mac Pherson comprenant une attache selon l'une des revendications 1 à 10, comportant un ressort (4) dont la première spire (41) est comprise axialement entre la portée de montage (320) et le rebord (32R).12 Mac Pherson type suspension comprising a fastener according to one of claims 1 to 10, comprising a spring (4) whose first turn (41) is included axially between the mounting surface (320) and the flange (32R).
13 Suspension selon la revendication 12, dans laquelle le diamètre de la seconde spire (42) du ressort est supérieur au diamètre de la première spire (41).13 Suspension according to claim 12, wherein the diameter of the second turn (42) of the spring is greater than the diameter of the first turn (41).
14. Suspension de type Mac Pherson pour roue directrice, comprenant une attache selon l'une des revendications 1 à 10, comportant un ressort (4) et un roulement (6) dont l'une des cages constitue ladite coupelle (62) ou est en appui sur ladite coupelle (62), le roulement étant compris axialement entre la portée de montage (320) et le rebord (32R), et dont l'autre (61) des cages tourne avec le ressort (4) pour suivre l'orientation des roues directrices.14. Mac Pherson type suspension for a steering wheel, comprising a fastener according to one of claims 1 to 10, comprising a spring (4) and a bearing (6) one of whose cages constitutes said cup (62) or is resting on said cup (62), the bearing being included axially between the mounting surface (320) and the flange (32R), and the other (61) of the cages of which rotates with the spring (4) to follow the steering wheel orientation.
15 Suspension selon la revendication 14, dans laquelle la première spire (41) du ressort est comprise axialement entre la portée de montage (320) et le rebord (32R).15 Suspension according to claim 14, wherein the first turn (41) of the spring is included axially between the mounting surface (320) and the flange (32R).
16 Suspension selon la revendication 15, dans laquelle le diamètre de la seconde spire (42) du ressort est supérieur au diamètre de la première spire (41). 16 Suspension according to claim 15, wherein the diameter of the second turn (42) of the spring is greater than the diameter of the first turn (41).
EP98933737A 1998-06-26 1998-06-26 Upper coupling attachment for macpherson strut Withdrawn EP1089890A1 (en)

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PCT/FR1998/001366 WO2000000359A1 (en) 1998-06-26 1998-06-26 Upper coupling attachment for macpherson strut

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US6412798B2 (en) 2002-07-02
US20010015537A1 (en) 2001-08-23

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