FR2707563A1 - Transverse leaf spring suspension - Google Patents

Transverse leaf spring suspension Download PDF

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Publication number
FR2707563A1
FR2707563A1 FR9308117A FR9308117A FR2707563A1 FR 2707563 A1 FR2707563 A1 FR 2707563A1 FR 9308117 A FR9308117 A FR 9308117A FR 9308117 A FR9308117 A FR 9308117A FR 2707563 A1 FR2707563 A1 FR 2707563A1
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FR
France
Prior art keywords
blade
elements
anchors
chassis
leaf spring
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.)
Granted
Application number
FR9308117A
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French (fr)
Other versions
FR2707563B1 (en
Inventor
Chevret Remy
Lardeur Pascal
Richard Laurent
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR9308117A priority Critical patent/FR2707563B1/en
Publication of FR2707563A1 publication Critical patent/FR2707563A1/en
Application granted granted Critical
Publication of FR2707563B1 publication Critical patent/FR2707563B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/001—Suspension arms, e.g. constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/08—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only arranged substantially transverse to the longitudinal axis of the vehicle
    • 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
    • B60G15/07—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the damper being connected to the stub axle and the spring being arranged around the damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs

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

Abstract

Transverse leaf spring suspension for a motor vehicle front axle assembly in which suspension the said leaf has a longitudinal axis of symmetry (14) and on the one hand at each of its ends bears a fastener (6) to which the lower end of a stub axle holder (7) is attached and, on the other hand, anchoring points (2, 2', 3, 3') for members for joining the leaf to an element of the chassis (8) of the vehicle, characterised in that the said leaf consists of two partially superimposed elements (1a, 1b) joined together via at least one elastic link (12, 13, 13').

Description

SUSPENSION A LAME DE RESSORT TRANSVERSALE
L'invention concerne une suspension à lame de ressort transversale pour un train avant de véhicule automobile dans laquelle ladite lame possède un axe de symétrie longitudinal et porte d'une part à chaque extrémité une attache à laquelle est solidarisée à l'extrémité inférieure d'un porte-fusée et d'autre part des ancrages d'organes de liaison de la lame avec un élément du châssis du véhicule.CROSS SPRING BLADE SUSPENSION
The invention relates to a transverse leaf spring suspension for a front axle of a motor vehicle in which said leaf has a longitudinal axis of symmetry and carries on the one hand at each end a fastener to which is secured to the lower end of a stub axle and on the other hand anchors for connecting the blade with an element of the vehicle chassis.

La publication FR-A-2.656.838 décrit une telle suspension dans laquelle un premier groupe d'organes de fixation immobilise la lame de ressort dans les sens longitudinal, transversal et vertical et dans laquelle un deuxième groupe d'organes autorise une déformation élastique de la lame selon les sens longitudinal et transversal. Dans une telle suspension, la lame de ressort possède une partie médiane découpée orientée vers le groupe motopropulseur et des terminaisons latérales orientées vers les roues directrices du véhicule.The publication FR-A-2,656,838 describes such a suspension in which a first group of fixing members immobilizes the leaf spring in the longitudinal, transverse and vertical directions and in which a second group of members allows an elastic deformation of the blade in the longitudinal and transverse directions. In such a suspension, the leaf spring has a cut middle part oriented towards the power train and lateral terminations oriented towards the steering wheels of the vehicle.

L'invention a pour objet de perfectionner ce type de suspens ion en améliorant la résistance de la lame aux contraintes de torsion consécutives aux - efforts de flexion sous l'effet des variations de la charge du véhicule et lorsque la roue du véhicule subit une accélération verticale, - efforts de cisaillements sous l'effet des efforts transversaux transmis par les roues du véhicule et sous l'effet des efforts dus au couple de freinage.The object of the invention is to improve this type of suspension by improving the resistance of the blade to torsional stresses resulting from - bending forces under the effect of variations in the vehicle load and when the vehicle wheel is accelerated. vertical, - shear forces under the effect of transverse forces transmitted by the vehicle wheels and under the effect of forces due to the braking torque.

Selon l'invention, la lame est constituée par deux éléments partiellement superposés et reliés l'un à l'autre par l'intermédiaire d'au moins une liaison élastique.According to the invention, the blade consists of two partially superimposed elements and connected to each other by means of at least one elastic connection.

La suspension ainsi réalisée assure l'absorption des efforts consécutifs aux mouvements de la roue tout en assurant un guidage correct de celle-ci.The suspension thus produced ensures the absorption of the forces consecutive to the movements of the wheel while ensuring correct guiding of the latter.

D'autres caractéristiques et avantages de la lame de ressort transversale selon l'invention apparaîtront à la lecture de la description d'un exemple de réalisation de celle-ci en référence au dessin annexé dans lequel - la figure l est une représentation perspective de l'ensemble de la suspension, - la figure 2 est une vue en coupe longitudinale de la suspension représentée à la figure l, - les figures 3 et 4 représentent des variantes de réalisation de la lame de ressort,
Les organes communs aux différentes figures portent les mêmes références.Other characteristics and advantages of the transverse leaf spring according to the invention will appear on reading the description of an exemplary embodiment thereof with reference to the appended drawing in which - Figure l is a perspective representation of the 'set of the suspension, - Figure 2 is a longitudinal sectional view of the suspension shown in Figure l, - Figures 3 and 4 show alternative embodiments of the leaf spring,
The bodies common to the different figures bear the same references.

Selon la figure 1, la lame 1 de ressort transversale est réalisée à titre d'exemple en matériau composite à base de fibres enrobés dans une résine et qui s'étendent transversalement entre l'attache 6 de la lame d'un porte-fusée 7 de la roue avant 5 et l'ancrage 3,3' de la lame au niveau haut d'un élément de structure 8 du châssis. La partie latérale de la lame 1 remplit de la sorte la fonction de ressort de suspension et de bras support du porte-fusée 7 de la roue 5.According to Figure 1, the blade 1 of transverse spring is made by way of example from a composite material based on fibers coated in a resin and which extend transversely between the fastener 6 of the blade of a stub axle 7 of the front wheel 5 and the anchoring 3.3 ′ of the blade at the high level of a structural element 8 of the chassis. The lateral part of the blade 1 thus fulfills the function of suspension spring and support arm of the stub axle 7 of the wheel 5.

Le porte-fusée 7 se prolonge vers le haut par une jambe de force à amortisseur 4 fixée à un élément il de la carrosserie.The steering knuckle 7 is extended upwards by a shock-absorbing strut 4 fixed to an element il of the bodywork.

La figure 1 qui représente une vue en perspective d'une structure préférée de réalisation de suspension à lame de ressort transversale selon l'invention, est constituée des éléments suivants - une lame 1 en matériau composite réalisée à titre d'exemple en matériau composite à fibres ou des tissus, enrobés dans une résine qui assure le rôle de liant, et qui s'étendent transversalement entre les roues avant 5 d'un véhicule automobile. La lame 1 réalise les fonctions de ressort de suspension, de structure de guidage des roues, ainsi que de barres anti-dévers, - Deux porte-fusée 7, - Deux jambes de force portant les amortisseurs 4.FIG. 1 which represents a perspective view of a preferred structure for making a suspension with a transverse leaf spring according to the invention, consists of the following elements - a blade 1 made of composite material made by way of example of composite material with fibers or fabrics, coated in a resin which acts as a binder, and which extend transversely between the front wheels 5 of a motor vehicle. The blade 1 performs the functions of suspension spring, wheel guiding structure, as well as anti-roll bars, - Two knuckles 7, - Two struts carrying the shock absorbers 4.

Cet ensemble d'éléments qui forme la structure de guidage de roues est lié à la caisse du véhicule de la façon suivante - Deux ancrages arrière 2,2' permettent de fixer la lame au niveau bas de l'élément de châssis 8 représenté par sa traverse 15 à la figure 2 et sont construits de façon à immobiliser la lame 1 dans les trois directions X, Y, Z (longitudinale, transversale, verticale).This set of elements which forms the wheel guide structure is linked to the vehicle body in the following manner - Two rear anchors 2,2 ′ allow the blade to be fixed at the low level of the chassis element 8 represented by its cross 15 in Figure 2 and are constructed so as to immobilize the blade 1 in the three directions X, Y, Z (longitudinal, transverse, vertical).

- Deux ancrages avant 3 et 3' permettent de fixer la lame 1 à la structure du châssis de façon à bloquer les mouvements de ladite lame suivant la direction Z (verticale) tout en laissant une légère liberté dans les directions X et Y (longitudinale et transversale) grâce à 11 emploi d'éléments de liaison 9 montés sensiblement verticalement et qui relient par des fixations élastiques les ancrages 3,3' de la lame 1 au niveau haut de l'élément de châssis 8.- Two front anchors 3 and 3 'allow the blade 1 to be fixed to the chassis structure so as to block the movements of said blade in the Z direction (vertical) while leaving a slight freedom in the X and Y directions (longitudinal and transverse) thanks to 11 use of connecting elements 9 mounted substantially vertically and which connect by elastic fastenings the anchors 3.3 ′ of the blade 1 at the high level of the chassis element 8.

Deux fixations 11 permettent de fixer les attaches supérieures des amortisseurs 4 à la caisse comme on le voit sur la figure 2. La configuration de la lame 1 permet de s'affranchir des problèmes d'architecture, en contournant enveloppant la partie arrière du carter du groupe moto propulseur 10. On voit très bien sur cette figure la forme particulière de la lame 1 qui permet sa fixation par quatre ancrages 2,2' et 3,3' sous la carrosserie du véhicule. On remarque notamment les ancrages arrières 2,2' de la lame 1 sur le niveau bas du châssis ainsi que les éléments de liaison 9 qui sont fixés en 3,3' à la partie avant de ladite lame sur le niveau haut de l'élément de châssis 8.Two fixings 11 make it possible to fix the upper attachments of the shock absorbers 4 to the body as seen in FIG. 2. The configuration of the blade 1 makes it possible to overcome architectural problems, bypassing enveloping the rear part of the casing of the propellant group 10. We can see very clearly in this figure the particular shape of the blade 1 which allows its fixing by four anchors 2.2 'and 3.3' under the vehicle body. We note in particular the rear anchors 2.2 ′ of the blade 1 on the low level of the chassis as well as the connecting elements 9 which are fixed at 3.3 ′ to the front part of said blade on the high level of the element chassis 8.

Comme représenté aux figures 1,3 et 4, les éléments la, lb de la lame 1 sont solidarisés par l'intermédiaire des liaisons élastiques 12, 13 et 13'. Selon l'invention, les ancrages des éléments la, lb avec le niveau bas de l'élément de châssis 8 sont localisés à proximité des liaisons élastiques 13, 13' lesquelles sont symétriquement disposées par rapport à l'axe longitudinal de symétrie (14) de la lame (1).As shown in Figures 1,3 and 4, the elements la, lb of the blade 1 are secured by means of the elastic connections 12, 13 and 13 '. According to the invention, the anchors of the elements la, lb with the low level of the chassis element 8 are located near the elastic connections 13, 13 'which are symmetrically arranged with respect to the longitudinal axis of symmetry (14) of the blade (1).

Selon l'invention, chaque liaison élastique 12,13,13' est constituée par une couche de matériau élastomère adhérée entre les deux éléments la,lb de la lame 1 sur des surfaces en regard desdits éléments. Les liaisons élastiques 13, 13' sont symétriquement disposées par rapport à l'axe longitudinal 14 de la lame 1. Les caractéristiques du matériau élastomère constituant lesdites liaisons 12,13 et 13' sont choisies de façon à permettre un dosage de l'effet anti-dévers de la lame 1 ainsi que d'obtenir des effets de pince et d'ouverture sous des efforts longitudinaux respectivement de propulsion et de freinage.According to the invention, each elastic connection 12, 13, 13 ′ is formed by a layer of elastomeric material adhered between the two elements 1a, 1b of the blade 1 on surfaces facing said elements. The elastic connections 13, 13 'are symmetrically arranged with respect to the longitudinal axis 14 of the blade 1. The characteristics of the elastomeric material constituting said connections 12, 13 and 13' are chosen so as to allow a dosage of the anti effect - downside of the blade 1 as well as obtaining gripping and opening effects under longitudinal forces of propulsion and braking respectively.

Selon l'invention, les éléments la, lob de la lame 1 portent respectivement deux ancrages 2a,2'a 2b,2'b sur le niveau bas de l'élément de châssis 8, comme représenté à la figure 3.According to the invention, the elements la, lob of the blade 1 respectively carry two anchors 2a, 2'a 2b, 2'b on the low level of the chassis element 8, as shown in FIG. 3.

Selon l'invention, dans cette configuration, et dans le but de ne pas augmenter inconsidérément les dimensions de la lame 1, les ancrages (2a,2'a,2b,2'b) des éléments la,lb de la lame 1 sur la traverse 15 avec le niveau bas de l'élément de châssis 8 et disposés d'un même côté de l'axe longitudinal de symétrie 14 de la lame 1 sont sensiblement confondus. According to the invention, in this configuration, and with the aim of not thoughtlessly increasing the dimensions of the blade 1, the anchors (2a, 2'a, 2b, 2'b) of the elements 1a, 1b of the blade 1 on the cross member 15 with the low level of the chassis element 8 and arranged on the same side of the longitudinal axis of symmetry 14 of the blade 1 are substantially combined.

Bien entendu, l'invention n'est nullement limitée aux modes de réalisations décrits et illustrés qui n'ont été donnés qu'à titre d'exemple.Of course, the invention is in no way limited to the embodiments described and illustrated which have been given only by way of example.

Au contraire, l'invention comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci sont effectuées suivant son esprit. On the contrary, the invention includes all the technical equivalents of the means described and their combinations if these are carried out according to the spirit.

Claims (4)

REVENDICATIONS 1) Suspens ion à lame de ressort transversale pour un train avant de véhicule automobile dans laquelle ladite lame possède un axe de symétrie longitudinal (14) et porte d'une part à chacune de ses extrémités une attache (6) à laquelle est solidarisée l'extrémité inférieure d'un porte-fusée (7) et d'autre part des ancrages (2,2',3,3') d'organes de liaison de la lame avec un élément du châssis (8) du véhicule caractérisée par le fait que ladite lame est constituée par deux éléments (la,lb) partiellement superposés et reliés l'un à l'autre par l'intermédiaire d'au moins une liaison élastique (12,13,13').1) Suspens ion transverse leaf spring for a front end of a motor vehicle in which said blade has a longitudinal axis of symmetry (14) and carries on the one hand at each of its ends a fastener (6) to which is secured l 'lower end of a knuckle (7) and on the other hand the anchors (2,2', 3,3 ') of blade connecting members with an element of the chassis (8) of the vehicle characterized by the fact that said blade is constituted by two elements (la, lb) partially superimposed and connected to one another by means of at least one elastic connection (12,13,13 '). 2) Suspension à lame selon la revendication 1, caractérisée par le fait que les ancrages (2,2') des éléments (la,lb) de la lame 1 avec le niveau bas de l'élément de châssis (8) sont localisés à proximité de liaisons élastiques (13,13') lesquelles sont symétriquement disposées par rapport à l'axe de symétrie longitudinal de la lame (1). 2) Blade suspension according to claim 1, characterized in that the anchors (2,2 ') of the elements (la, lb) of the blade 1 with the low level of the chassis element (8) are located at proximity of elastic connections (13,13 ') which are symmetrically arranged with respect to the longitudinal axis of symmetry of the blade (1). 3) Suspension à lame selon les revendications 1 à 2, caractérisée par le fait que les éléments (la,lb) de la lame 1 portent respectivement deux ancrages (2a,2'a;2b,2'b) sur le niveau bas de l'élément de châssis 8, les ancrages disposés d'un même côté de l'axe de symétrie longitudinal (14) de la lame (1) étant sensiblement confondus. 3) Blade suspension according to claims 1 to 2, characterized in that the elements (la, lb) of the blade 1 respectively carry two anchors (2a, 2'a; 2b, 2'b) on the low level of the chassis element 8, the anchors arranged on the same side of the longitudinal axis of symmetry (14) of the blade (1) being substantially combined. 4) Suspension à lame selon l'une quelconque des revendications précédentes caractérisée par le fait que chaque liaison élastique (12,13,13') est constituée par une couche de matériau élastomère adhérée entre les deux éléments la,lb de la lame 1 sur des surfaces en regard desdits éléments la, lb. 4) blade suspension according to any one of the preceding claims, characterized in that each elastic connection (12,13,13 ') consists of a layer of elastomeric material adhered between the two elements 1a, 1b of the blade 1 on facing surfaces of said elements 1a, 1b.
FR9308117A 1993-07-02 1993-07-02 Suspension with transverse leaf spring. Expired - Fee Related FR2707563B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9308117A FR2707563B1 (en) 1993-07-02 1993-07-02 Suspension with transverse leaf spring.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9308117A FR2707563B1 (en) 1993-07-02 1993-07-02 Suspension with transverse leaf spring.

Publications (2)

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FR2707563A1 true FR2707563A1 (en) 1995-01-20
FR2707563B1 FR2707563B1 (en) 1995-08-25

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FR9308117A Expired - Fee Related FR2707563B1 (en) 1993-07-02 1993-07-02 Suspension with transverse leaf spring.

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507974A1 (en) * 1981-06-22 1982-12-24 Zwalve Albert INDIVIDUALLY SUSPENDED WHEEL VEHICLE
EP0368836A1 (en) * 1988-11-11 1990-05-16 Steyr-Daimler-Puch Aktiengesellschaft Wheel suspension for vehicles
DE3935724A1 (en) * 1988-11-11 1990-05-17 Steyr Daimler Puch Ag Suspension system for vehicle rear wheels
EP0436407A1 (en) * 1990-01-05 1991-07-10 Regie Nationale Des Usines Renault S.A. Wheel guiding structure
JPH04159110A (en) * 1990-10-22 1992-06-02 Toyota Motor Corp Trailing twist beam type rear suspension

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507974A1 (en) * 1981-06-22 1982-12-24 Zwalve Albert INDIVIDUALLY SUSPENDED WHEEL VEHICLE
EP0368836A1 (en) * 1988-11-11 1990-05-16 Steyr-Daimler-Puch Aktiengesellschaft Wheel suspension for vehicles
DE3935724A1 (en) * 1988-11-11 1990-05-17 Steyr Daimler Puch Ag Suspension system for vehicle rear wheels
EP0436407A1 (en) * 1990-01-05 1991-07-10 Regie Nationale Des Usines Renault S.A. Wheel guiding structure
FR2656838A1 (en) * 1990-01-05 1991-07-12 Renault WHEEL GUIDE STRUCTURE.
JPH04159110A (en) * 1990-10-22 1992-06-02 Toyota Motor Corp Trailing twist beam type rear suspension

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 16, no. 452 (M - 1313) 21 September 1992 (1992-09-21) *

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