FR2522098A1 - Parabolic multi-leaf spring - has layers of resilient material between leaves held by adhesive - Google Patents

Parabolic multi-leaf spring - has layers of resilient material between leaves held by adhesive Download PDF

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Publication number
FR2522098A1
FR2522098A1 FR8202813A FR8202813A FR2522098A1 FR 2522098 A1 FR2522098 A1 FR 2522098A1 FR 8202813 A FR8202813 A FR 8202813A FR 8202813 A FR8202813 A FR 8202813A FR 2522098 A1 FR2522098 A1 FR 2522098A1
Authority
FR
France
Prior art keywords
leaf
spring
blades
adhesive
resilient material
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
FR8202813A
Other languages
French (fr)
Other versions
FR2522098B1 (en
Inventor
Anh-Tuan Pham
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.)
Allevard Industries SA
Original Assignee
Allevard Industries SA
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 Allevard Industries SA filed Critical Allevard Industries SA
Priority to FR8202813A priority Critical patent/FR2522098B1/en
Priority to FR8207354A priority patent/FR2526110B2/en
Publication of FR2522098A1 publication Critical patent/FR2522098A1/en
Application granted granted Critical
Publication of FR2522098B1 publication Critical patent/FR2522098B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/20—Leaf springs with layers, e.g. anti-friction layers, or with rollers between the leaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/32—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds
    • B60G11/34—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs
    • B60G11/38—Resilient suspensions characterised by arrangement, location or kind of springs having springs of different kinds including leaf springs and also rubber springs
    • 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
    • B60G2202/10—Type of spring
    • B60G2202/11—Leaf spring
    • B60G2202/112—Leaf spring longitudinally arranged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2500/00—Indexing codes relating to the regulated action or device
    • B60G2500/20—Spring action or springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Springs (AREA)

Abstract

The spring has a primary steel leaf (1) with the mountings (2) at each end. Additional leaves (3,4) are clamped to the primary leaf by a bolt (7) with spacers (5,6) between the leaves. The ends of the one leaf (2) are in contact with, and rub against, the underside of the primary leaf. The ends of the other leaf (3) are similarly arranged in relation to the leaf (2). A resilient material such as rubber (8) is placed in the free spaces between the leaves, either in solid form or by injection. It is maintained in place by adhesive.

Description

Ressorts à lames paraboliques avec matériau amortissant.Parabolic leaf springs with shock absorbing material.

La présente invention concerne de nouveaux ressorts à lames paraboliques comportant un matériau amortissant. The present invention relates to new parabolic leaf springs comprising a damping material.

Les ressorts formés par l'assemblage de lames à profils constants ou paraboliques sont connus. The springs formed by the assembly of blades with constant or parabolic profiles are known.

Dans les ressorts à lames à profil constant il se produit, lors du travail du ressort, un frottement sec inter-lames qui joue un rôle technique important car il permet d'assurer l'amortissement des oscillations des véhicules qui utilisent ces ressorts comme éléments de suspension. In leaf springs with constant profile there occurs, during the working of the spring, a dry inter-leaf friction which plays an important technical role because it makes it possible to ensure the damping of the oscillations of vehicles which use these springs as elements of suspension.

Dans les ressorts à lames profil parabolique (ressorts qui permettent une meilleure utilisation de l'acier, le frottement sec interlame ne se produit plus qu'aulx extrémités de lames adjacentes. De ce fait l'amortissement induit par ledit frottement est insuffisant pour atteindre une atténuation convenable des oscillations. In parabolic profile leaf springs (springs that allow better use of steel, dry interlame friction no longer occurs at the ends of adjacent blades. As a result, the damping induced by said friction is insufficient to achieve a suitable attenuation of the oscillations.

Il est donc souhaitable, pour les ressorts à lames à profil parabolique de disposer d'un élément qui procure un amortissement supplémentaire appréciable et contrôlable. C'est l le but de la présente invention. It is therefore desirable for leaf springs with parabolic profile to have an element which provides appreciable and controllable additional damping. This is the object of the present invention.

Les ressorts å lames-paraboliques selon la présente invention sont caractérisés, en vue d'apporter un amortissement supplémentaire, l'espace libre entre au moins deux lames paraboliques consécutives desdits ressorts est rempli d'un matériau caoutchoutique ou viscoélastique. The parabolic leaf springs according to the present invention are characterized, in order to provide additional damping, the free space between at least two consecutive parabolic leaves of said springs is filled with a rubbery or viscoelastic material.

Bien entendu, si le ressort est réalisé par empilement de plus de deux lames, ledit matériau caoutchoutique ou viscoélastique peut remplir seulement l'espace situé entre deux de ces lames ou peut remplir tous les espaces libres entre les lames.  Of course, if the spring is produced by stacking more than two blades, said rubber or viscoelastic material can fill only the space between two of these blades or can fill all the free spaces between the blades.

L'exemple non limitatif suivant décrit un mode de mise en oeuvre de l'invention ; cet exemple est illustré par la figure unique qui représente, en coupe longitudinale, un ressort selon l'invention. The following nonlimiting example describes an embodiment of the invention; this example is illustrated by the single figure which represents, in longitudinal section, a spring according to the invention.

Sur cette figure on a représenté
- en 1 la lame de ressort principale qui se termine par des oeillets de ressort 2,2 servant n l'accrochage
- en 3 et 4 d'autres lames de ressorts de forme parabolique ; les deux extrémités de la lame 2 s'appuient (et frottent) contre la face inférieure de la lame 1 et les deux extrémités de la lame 3 s'appuient (et frottent) contre la face inférieure de la lame 2
- en 5 et 6, des entretoises disposées entre les lames ; ces entretoises sont serrées entre les lames et les lames serrées sur ces entretoises grâce au dispositif 7 (rivet ou dispositif avec boulon de serrage).In this figure we have represented
- in 1 the main spring leaf which ends with spring eyelets 2.2 used for attachment
- in 3 and 4 other leaf springs of parabolic shape; the two ends of the blade 2 bear (and rub) against the underside of the blade 1 and the two ends of the blade 3 bear (and rub) against the underside of the blade 2
- In 5 and 6, spacers arranged between the blades; these spacers are clamped between the blades and the blades clamped on these spacers using device 7 (rivet or device with tightening bolt).

L'invention consiste 9 déposer dans au moins un des espaces libres entre les lames un matériau caoutchoutique ou viscoélastique amortisseur ; ce matériau schématisé en 8 sur la figure unique est indiqué comme emplissant la totalité des espaces libres entre les lames 1 et 2 d'une part et les lames 2 et 3 d'autre part. The invention consists in depositing in at least one of the free spaces between the blades a rubber or viscoelastic damping material; this material shown diagrammatically at 8 in the single figure is indicated as filling all of the free spaces between the blades 1 and 2 on the one hand and the blades 2 and 3 on the other hand.

On peut utiliser selon l'invention n'importe quel matériau caoutchoutique (e'est-à-dire matériau présentant des propriétés viscoélastiques) qui peut être aisément mis en place, entre les lames, pour y emplir tous les espaces libres. La mise en place de ce matériau caoutchoutique peut se faire en utilisant un matériau solide convenablement découpé mais s'effectuera de préfé rence en injectant le matériau ramolli ou fondu dans les espaces libres ; de cette façon la totalité de l'espace libre peut hêtre aisément rempli et de plus le matériau, lors de sa solidification, adhérera suffisamment aux lames, grâce notamment 5 l'utilisation d'adhésifs efficaces connus. Comme le matériau caoutchoutique peut etre plus ou moins réticulé, il sera possible, par un chauffage convenable de la pièce, après mise en place d'un matériau caoutchoutique non réticulé, d'effectuer ladite réticulation "in situ". Le matériau caoutchoutique peut être par exemple un caoutchouc Butyl qui présente en outre l'avantage d'etre résistant la corrosion et au vieillissement. Any rubber material can be used according to the invention (that is to say material having viscoelastic properties) which can be easily placed, between the blades, to fill all the free spaces therein. The establishment of this rubber material can be done using a solid material suitably cut but will preferably be carried out by injecting the softened or melted material into the free spaces; in this way the whole of the free space can be easily filled and in addition the material, when it solidifies, will adhere sufficiently to the blades, thanks in particular to the use of known effective adhesives. As the rubber material can be more or less crosslinked, it will be possible, by suitable heating of the part, after placement of a noncrosslinked rubber material, to effect said crosslinking "in situ". The rubber material can for example be a Butyl rubber which also has the advantage of being resistant to corrosion and to aging.

Le dispositif selon l'invention permet, tout en conservant a la suspension sa fréquence propre de contrôler l'importance de l'amortissement de cette suspension ; on peut par exemple, toutes choses égales par ailleurs, ramener une oscillation d'un ressort a une amplitude nulle en deux ou trois oscillations au lieu des cinq ou six oscillations nécessaires pour un ressort ne comportant pas de matériau caoutchoutique.  The device according to the invention allows, while retaining the suspension its natural frequency to control the amount of damping of this suspension; one can for example, all other things being equal, reduce an oscillation of a spring to a zero amplitude in two or three oscillations instead of the five or six oscillations necessary for a spring having no rubber material.

Claims (3)

E CATIONS E CATIONS REVEDfCATIOS 1. Nouveau ressort lames paraboliques (1)(3)(4) dans lequel des lames contiguës frottent l'une sur l'autre à leurs extrémités lorsque le ressort travaille et dans lequel lesdites lames sont serrées entre elles et sur des entretoises (5) (6) qui les séparent au milieu du ressort, caracterise en ce que ledit ressort comporte, dans au moins un des espaces libres (8) situés entre deux desdites lames, une substance caoutchoutique ou viscoélastique. REVEDfCATIOS 1. New parabolic leaf spring (1) (3) (4) in which contiguous blades rub against one another at their ends when the spring is working and in which said blades are clamped together and on spacers ( 5) (6) which separate them in the middle of the spring, characterized in that said spring comprises, in at least one of the free spaces (8) located between two of said blades, a rubbery or viscoelastic substance. 2. Nouveau ressort selon la revendication 1, caractérisé en ce que ladite substance caoutchoutique est un caoutchouc à fort amortissement.2. New spring according to claim 1, characterized in that said rubber substance is a rubber with high damping. 3. Nouveau ressort selon l'une des revendications 1 et 2, caractérisé en ce que ladite substance caoutchoutique a été mise en place par injection dans un moule. 3. New spring according to one of claims 1 and 2, characterized in that said rubber substance was put in place by injection into a mold.
FR8202813A 1982-02-19 1982-02-19 PARABOLIC BLADE SPRINGS WITH DAMPING MATERIAL Expired FR2522098B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8202813A FR2522098B1 (en) 1982-02-19 1982-02-19 PARABOLIC BLADE SPRINGS WITH DAMPING MATERIAL
FR8207354A FR2526110B2 (en) 1982-02-19 1982-04-28 SPRING WITH PARABOLIC BLADES COMPRISING DAMPING DEVICES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8202813A FR2522098B1 (en) 1982-02-19 1982-02-19 PARABOLIC BLADE SPRINGS WITH DAMPING MATERIAL

Publications (2)

Publication Number Publication Date
FR2522098A1 true FR2522098A1 (en) 1983-08-26
FR2522098B1 FR2522098B1 (en) 1986-07-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8202813A Expired FR2522098B1 (en) 1982-02-19 1982-02-19 PARABOLIC BLADE SPRINGS WITH DAMPING MATERIAL

Country Status (1)

Country Link
FR (1) FR2522098B1 (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR561311A (en) * 1919-07-08 1923-10-19 Spring improvements
FR695823A (en) * 1928-05-26 1930-12-22 Multiple leaf spring enhancements
FR749481A (en) * 1933-01-24 1933-07-25 Improvements to leaf springs
US1990802A (en) * 1932-11-08 1935-02-12 Tom H Thompson Vehicle spring
US2559105A (en) * 1945-09-22 1951-07-03 Jr Thomas A Banning Automobile spring and the like
DE811057C (en) * 1948-10-02 1951-08-16 Ernst Kreissig Rubber steel spring
DE826822C (en) * 1950-12-20 1952-03-06 Alexander Von Loewis Of Menar Leaf spring, especially for vehicles
FR1037613A (en) * 1950-08-01 1953-09-22 Spring Perch Co Complex leaf spring
FR1258934A (en) * 1960-03-09 1961-04-21 Composite leaf spring for vehicle suspensions
DE1141898B (en) * 1956-12-04 1962-12-27 Krauss Maffei Ag Guide and suspension of rigid axles for motor vehicles
FR1398857A (en) * 1964-04-01 1965-05-14 Ressorts Du Nord Sa Composite leaf spring
FR88329E (en) * 1965-03-29 1967-01-20 Ressorts Du Nord Sa Composite leaf spring

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR561311A (en) * 1919-07-08 1923-10-19 Spring improvements
FR695823A (en) * 1928-05-26 1930-12-22 Multiple leaf spring enhancements
US1990802A (en) * 1932-11-08 1935-02-12 Tom H Thompson Vehicle spring
FR749481A (en) * 1933-01-24 1933-07-25 Improvements to leaf springs
US2559105A (en) * 1945-09-22 1951-07-03 Jr Thomas A Banning Automobile spring and the like
DE811057C (en) * 1948-10-02 1951-08-16 Ernst Kreissig Rubber steel spring
FR1037613A (en) * 1950-08-01 1953-09-22 Spring Perch Co Complex leaf spring
DE826822C (en) * 1950-12-20 1952-03-06 Alexander Von Loewis Of Menar Leaf spring, especially for vehicles
DE1141898B (en) * 1956-12-04 1962-12-27 Krauss Maffei Ag Guide and suspension of rigid axles for motor vehicles
FR1258934A (en) * 1960-03-09 1961-04-21 Composite leaf spring for vehicle suspensions
FR1398857A (en) * 1964-04-01 1965-05-14 Ressorts Du Nord Sa Composite leaf spring
FR88329E (en) * 1965-03-29 1967-01-20 Ressorts Du Nord Sa Composite leaf spring

Also Published As

Publication number Publication date
FR2522098B1 (en) 1986-07-18

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