WO2013117858A2 - Improved brake drum for a vehicle - Google Patents

Improved brake drum for a vehicle Download PDF

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Publication number
WO2013117858A2
WO2013117858A2 PCT/FR2013/050247 FR2013050247W WO2013117858A2 WO 2013117858 A2 WO2013117858 A2 WO 2013117858A2 FR 2013050247 W FR2013050247 W FR 2013050247W WO 2013117858 A2 WO2013117858 A2 WO 2013117858A2
Authority
WO
WIPO (PCT)
Prior art keywords
bowl
metal insert
drum
brake drum
brake
Prior art date
Application number
PCT/FR2013/050247
Other languages
French (fr)
Other versions
WO2013117858A3 (en
Inventor
Michael Grandidier
Original Assignee
Peugeot Citroen Automobiles 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 Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Priority to CN201380008612.9A priority Critical patent/CN104583636A/en
Priority to EP13746818.7A priority patent/EP2888502A2/en
Publication of WO2013117858A2 publication Critical patent/WO2013117858A2/en
Publication of WO2013117858A3 publication Critical patent/WO2013117858A3/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/10—Drums for externally- or internally-engaging brakes
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D2065/13—Parts or details of discs or drums
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0004—Materials; Production methods therefor metallic
    • F16D2200/0008—Ferro
    • F16D2200/0021—Steel
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0004—Materials; Production methods therefor metallic
    • F16D2200/0026—Non-ferro
    • F16D2200/003—Light metals, e.g. aluminium
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2250/00—Manufacturing; Assembly
    • F16D2250/0084—Assembly or disassembly

Definitions

  • the present invention relates to an improved brake drum for a vehicle, in particular for a motor vehicle. It also relates to a vehicle, in particular a motor vehicle, which is equipped with such improved brake drums.
  • the brake drums that equip the motor vehicles are generally made of cast iron.
  • aluminum brake drums or drums called "bi-material” drums have already been produced, which include a cast iron track molded onto a steel or aluminum alloy flange. for foundry.
  • FR 1058672 discloses a motor vehicle brake drum, which comprises a circular axial ring comprising an inner friction track, which is connected to a hub in rotation.
  • the axial ring has, on its outer surface, a thermal mass.
  • This thermal mass comprises a steel retaining ring fixed on the axial ring, which has fastening forms on which a light alloy ring is overmolded.
  • the axial ring is part of a part made by stamping a sheet, which has a substantially flat connecting radial portion, comprising fastening means on the hub.
  • the object of the present invention is to provide an improved brake drum, which, compared to known cast iron drums of the prior art, has a substantial bulk gain while having thermal and mechanical characteristics which are equivalent to those of cast iron drums.
  • Another object of the present invention is to provide such a brake drum, which dissipates heat better during braking than do the drums "bi-material" of the prior art.
  • the present invention relates to an improved brake drum for a vehicle, particularly for a motor vehicle, which comprises:
  • a bowl cylindrical, which consists of a radial connecting part surrounded by a circular axial strip,
  • a metal insert which mainly comprises a circular band forcibly joined to the outer surface of the circular axial band of the bowl, and
  • the bowl is made by stamping and cutting a steel sheet.
  • the metal insert it is made by stamping a steel sheet.
  • the steel metal insert can be made by machining by removal of material.
  • the metal insert may advantageously be assembled on the bowl by a hooping method or by press fitting.
  • the overmolded crown is aluminum or aluminum alloy.
  • the metal insert has bores distributed over its constituent circular band, which may advantageously be evenly distributed over the entire peripheral surface of said circular band.
  • the circular band of the metal insert is of slightly conical shape with conicity turned towards the opposite direction to the radial connecting portion of the bowl, in the assembled position of one metal insert on the bowl.
  • This taper may be, for example, of the order of 5 ° angle.
  • the invention also relates to a method of producing a brake drum according to that described above in outline, and this new method comprises the following steps, taken in combination:
  • finishing machining is performed on the assembly thus constituted by the bowl, the metal insert and the ring.
  • the invention finally relates to a vehicle, in particular a motor vehicle, equipped with drum brakes, and in this vehicle at least one brake drum is in accordance with that described above in outline.
  • FIG. 1 is a schematic perspective view of the cylindrical bowl of the brake drum according to the present invention
  • FIG. 2 is a schematic perspective view of the metal insert of the brake drum according to the present invention
  • FIG. 3 illustrates the step of forcibly mounting the metal insert of FIG. 2 on the cylindrical bowl of FIG. 1;
  • FIGS. 4 and 5 illustrate the following step according to which a metal crown is overmolded on the outer peripheral surface of the assembly of FIG. 3,
  • FIG. 6 is a diagram illustrating the different geometrical data of the metal insert of the brake drum, according to the present invention.
  • FIG. 7 is a schematic perspective view of the brake drum according to the invention, gross overmolding, and
  • FIG. 8 is a schematic perspective view of the brake drum of Figure 7, after the completion of machining finishing.
  • the bowl 10 of generally cylindrical shape, made by stamping and cutting a steel sheet, comprises a radially connecting portion 11, substantially planar, which comprises, on the one hand, a centering bore 14 on the hub, not shown. a wheel, and secondly, holes 13 for receiving axial clamping screws on said wheel hub.
  • the radial connecting portion 11 is surrounded by a circular axial strip 12, of external diameter "D" and of substantially constant thickness, which comprises an inner surface 12B intended to form the friction surface of brake linings.
  • FIG. 2 represents a metal insert, of general reference 20, consisting mainly of a continuous circular sheet metal band 21, which is of constant cross section with a thickness "e".
  • the metal insert 20 has two rows of holes 25 regularly distributed over the entire periphery of the circular band 21.
  • the reference 22 designates a lateral flange peripheral extending the circular band 21, which is substantially 90 ° angle of said circular band 21, that is to say slightly inclined relative to the radial direction of 1 insert.
  • a first step of assembling the constituent parts of the brake drum according to the invention is constituted by the "tight" assembly of the metal insert 20 on the cylindrical outer surface 12A of the circular axial strip 12 of the bowl 10.
  • This "tight" assembly is produced by elastic deformation of the metal insert 20.
  • the outer peripheral surface of the assembly constituted by the bowl 10 and the metal insert 20 assembled receives by overmoulding an aluminum or aluminum alloy ring of general reference 30, radial thickness "s" out of the bosses or molding ribs 30A.
  • the aluminum or aluminum alloy of the ring 30 fills the holes 25 to the circular axial strip 12 of the bowl 10.
  • the brake drum, overmoulding gross, is shown in the drawing of Figure 7, with its bosses or molding ribs 30A.
  • the holes 25, made by machining or punching can be evenly distributed over several rows over the entire periphery of the circular band 21, for example in two rows, as shown in FIG. be inclined or not with respect to the plane of the circular band 21.
  • the holes 25 may, alternatively, not be aligned transversely, but be arranged staggered, for example.
  • the circular band 21 constituting the metal insert 20 is of conical shape with low conicity facing the direction opposite to the central connecting portion 11 of the bowl 10 in the assembled position of the metal insert 20 on the bowl 10.
  • This conicity, angle "a" may be, by way of non-limiting example of the object and scope of the present invention, of the order of 5 ° d 'angle.
  • the operation of the brake drum described above is identical to that of a conventional cast iron brake drum, the heat generated on the friction surface being stored in the aluminum instead of being stored in the cast iron.
  • the drum of the invention has excellent mechanical strength and stores the heat created by the friction while braking,

Abstract

The present invention concerns a brake drum comprising a cylindrical bowl, comprising a radial connecting part (11) surrounded by a axial circular band (12), a metal insert comprising a circular band (21) assembled by force on the outer surface of the axial circular band (12) of the bowl and a metal crown (30) overmoulded on the peripheral outer surface of the assembly formed by the metal insert (20) and the bowl. It also concerns a method for producing such a brake drum and a motor vehicle comprising at least one such brake drum.

Description

TAMBOUR DE FREIN PERFECTIONNE POUR VEHICULE  PERFECTED BRAKE DRUM FOR VEHICLE
La présente invention concerne un tambour de frein perfectionné pour véhicule, en particulier pour véhicule automobile. Elle concerne également un véhicule, en particulier un véhicule automobile, qui est équipé de tels tambours de frein perfectionnés. The present invention relates to an improved brake drum for a vehicle, in particular for a motor vehicle. It also relates to a vehicle, in particular a motor vehicle, which is equipped with such improved brake drums.
Fabriqués en grande série, les tambours de frein qui équipent les véhicules automobiles sont réalisés généralement en fonte. Dans le but d'alléger ces tambours, on a déjà produit des tambours de frein intégralement en aluminium ou bien des tambours dits tambours « bi-matière », qui comportent une piste en fonte surmoulée sur un flasque en acier ou en alliage d'aluminium pour fonderie.  Manufactured in large series, the brake drums that equip the motor vehicles are generally made of cast iron. In order to lighten these drums, aluminum brake drums or drums called "bi-material" drums have already been produced, which include a cast iron track molded onto a steel or aluminum alloy flange. for foundry.
On connaît d'autres solutions techniques d'allégement des tambours de frein. Ainsi, à titre d'exemple, le document FR 1058672 décrit un tambour de frein de véhicule automobile, qui comporte une couronne axiale circulaire comprenant une piste de frottement intérieure, qui est reliée à un moyeu en rotation. La couronne axiale comporte, sur sa surface extérieure, une masse thermique. Cette masse thermique comprend un anneau de maintien en acier fixé sur la couronne axiale, qui dispose de formes d'accrochage sur lesquelles une couronne en alliage léger est surmoulée. La couronne axiale fait partie d'une pièce réalisée par emboutissage d'une tôle, qui comporte une partie radiale de liaison sensiblement plane, comprenant des moyens de fixation sur le moyeu.  Other technical solutions for lightening brake drums are known. Thus, for example, FR 1058672 discloses a motor vehicle brake drum, which comprises a circular axial ring comprising an inner friction track, which is connected to a hub in rotation. The axial ring has, on its outer surface, a thermal mass. This thermal mass comprises a steel retaining ring fixed on the axial ring, which has fastening forms on which a light alloy ring is overmolded. The axial ring is part of a part made by stamping a sheet, which has a substantially flat connecting radial portion, comprising fastening means on the hub.
Le but de la présente invention est de fournir un tambour de frein perfectionné, qui, par rapport aux tambours en fonte connus de l'art antérieur, présente un gain en masse substantiel tout en ayant des caractéristiques thermiques et mécaniques qui sont équivalentes à celles des tambours en fonte.  The object of the present invention is to provide an improved brake drum, which, compared to known cast iron drums of the prior art, has a substantial bulk gain while having thermal and mechanical characteristics which are equivalent to those of cast iron drums.
Un autre but de la présente invention est de fournir un tel tambour de frein, qui dissipe mieux la chaleur lors du freinage que ne le font les tambours « bi-matière » de l'art antérieur. Another object of the present invention is to provide such a brake drum, which dissipates heat better during braking than do the drums "bi-material" of the prior art.
Enfin, c'est également un but de la présente invention de fournir un tel tambour de frein perfectionné, qui soit, de manière générale, de conception et de fabrication simples, qui soit robuste, fiable et économique.  Finally, it is also an object of the present invention to provide such an improved brake drum, which is generally of simple design and manufacture, which is robust, reliable and economical.
Pour parvenir à ces buts, la présente invention a pour objet un tambour de frein perfectionné pour véhicule, en particulier pour véhicule automobile, qui comporte :  To achieve these aims, the present invention relates to an improved brake drum for a vehicle, particularly for a motor vehicle, which comprises:
- un bol, cylindrique, qui est constitué par une partie radiale de liaison entourée par une bande axiale circulaire ,  a bowl, cylindrical, which consists of a radial connecting part surrounded by a circular axial strip,
- un insert métallique, qui comprend principalement une bande circulaire assemblée à force sur la surface externe de la bande axiale circulaire du bol, et  a metal insert, which mainly comprises a circular band forcibly joined to the outer surface of the circular axial band of the bowl, and
- une couronne métallique surmoulée sur la surface périphérique externe de l'assemblage formé par 1 'insert métallique et le bol.  a metal crown overmolded on the outer peripheral surface of the assembly formed by the metal insert and the bowl.
Selon un mode préféré de réalisation de l'invention, le bol est réalisé par emboutissage et découpe d'une tôle d'acier. Quant à l'insert métallique, il est réalisé par emboutissage d'une tôle d'acier.  According to a preferred embodiment of the invention, the bowl is made by stamping and cutting a steel sheet. As for the metal insert, it is made by stamping a steel sheet.
En variante, l'insert métallique en acier peut être réalisé par usinage par enlèvement de matière.  Alternatively, the steel metal insert can be made by machining by removal of material.
L'insert métallique peut avantageusement être assemblé sur le bol par un procédé de frettage ou bien par emmanchement à force.  The metal insert may advantageously be assembled on the bowl by a hooping method or by press fitting.
Selon un mode préféré de réalisation de l'invention également, la couronne surmoulée est en aluminium ou bien en alliage d'aluminium.  According to a preferred embodiment of the invention also, the overmolded crown is aluminum or aluminum alloy.
De préférence, l'insert métallique présente des perçages répartis sur sa bande circulaire constitutive, qui peuvent avantageusement être répartis de manière régulière sur toute la surface périphérie de ladite bande circulaire.  Preferably, the metal insert has bores distributed over its constituent circular band, which may advantageously be evenly distributed over the entire peripheral surface of said circular band.
Ces perçages peuvent être repartis sur plusieurs rangées, par exemple sur deux rangées. De manière préférentielle, la bande circulaire de l 'insert métallique est de forme légèrement conique à conicité tournée vers la direction opposée à la partie radiale de liaison du bol, en position assemblée de 1 'insert métallique sur le bol. These holes can be distributed over several rows, for example in two rows. Preferably, the circular band of the metal insert is of slightly conical shape with conicity turned towards the opposite direction to the radial connecting portion of the bowl, in the assembled position of one metal insert on the bowl.
Cette conicité peut être, par exemple, de l'ordre de 5° d'angle.  This taper may be, for example, of the order of 5 ° angle.
L'invention a aussi pour objet un procédé de réalisation d'un tambour de frein conforme à celui décrit ci-dessus dans ses grandes lignes, et ce procédé nouveau comporte les étapes suivantes, prise en combinaison :  The invention also relates to a method of producing a brake drum according to that described above in outline, and this new method comprises the following steps, taken in combination:
- réalisation du bol,  - realization of the bowl,
- réalisation de 1 'insert métallique,  realization of the metal insert,
assemblage à force de l 'insert métallique sur le bol, et  forcibly joining the metal insert to the bowl, and
- surmoulage de la couronne sur l'ensemble obtenu par l'assemblage à force de 1 'insert métallique sur le bol.  overmoulding of the crown on the assembly obtained by the force assembly of the metal insert on the bowl.
Selon un mode préféré de réalisation du procédé de l'invention, des usinages de finition sont réalisés sur l'ensemble ainsi constitué par le bol, 1 'insert métallique et la couronne.  According to a preferred embodiment of the method of the invention, finishing machining is performed on the assembly thus constituted by the bowl, the metal insert and the ring.
L'invention a enfin pour objet un véhicule, en particulier un véhicule automobile, équipé de freins à tambour, et dans ce véhicule au moins un tambour de frein est conforme à celui décrit ci-dessus dans ses grandes lignes .  The invention finally relates to a vehicle, in particular a motor vehicle, equipped with drum brakes, and in this vehicle at least one brake drum is in accordance with that described above in outline.
D'autres buts, avantages et caractéristiques de l'invention apparaîtront dans la description qui suit d'un exemple de réalisation, non limitatif de l'objet et de la portée de la présente demande de brevet, accompagnée de dessins dans lesquels :  Other objects, advantages and features of the invention will appear in the following description of an example of embodiment, not limiting the object and scope of the present patent application, accompanied by drawings in which:
- la figure 1 est une vue en perspective, schématique, du bol cylindrique du tambour de frein selon la présente invention,  FIG. 1 is a schematic perspective view of the cylindrical bowl of the brake drum according to the present invention,
- la figure 2 est une vue en perspective, schématique, de 1 'insert métallique du tambour de frein selon la présente invention, - la figure 3 illustre l'étape de montage à force de 1 'insert métallique de la figure 2 sur le bol cylindrique de la figure 1, FIG. 2 is a schematic perspective view of the metal insert of the brake drum according to the present invention; FIG. 3 illustrates the step of forcibly mounting the metal insert of FIG. 2 on the cylindrical bowl of FIG. 1;
- les figures 4 et 5 illustrent l'étape suivante selon laquelle une couronne métallique est surmoulée sur la surface périphérique externe de l'assemblage de la figure 3, FIGS. 4 and 5 illustrate the following step according to which a metal crown is overmolded on the outer peripheral surface of the assembly of FIG. 3,
- la figure 6 est un schéma illustrant les différentes données géométriques de l' insert métallique du tambour de frein, selon la présente invention, FIG. 6 is a diagram illustrating the different geometrical data of the metal insert of the brake drum, according to the present invention,
- la figure 7 est une vue en perspective, schématique, du tambour de frein selon l'invention, brut de surmoulage, et  FIG. 7 is a schematic perspective view of the brake drum according to the invention, gross overmolding, and
- la figure 8 est une vue en perspective, schématique, du tambour de frein de la figure 7, après la réalisation des usinages de finition.  - Figure 8 is a schematic perspective view of the brake drum of Figure 7, after the completion of machining finishing.
En référence au dessin de la figure 1, on a représenté une ébauche destinée à un tambour de frein, qui est désignée « bol » dans la suite du texte et qui est référencée 10 de manière générale.  Referring to the drawing of Figure 1, there is shown a blank for a brake drum, which is designated "bol" in the rest of the text and which is referenced 10 generally.
Le bol 10, de forme générale cylindrique, réalisé par emboutissage et découpe d'une tôle en acier, comporte une partie radiale de liaison 11, sensiblement plane, qui comprend, d'une part, un alésage de centrage 14 sur le moyeu non représenté d'une roue, et d'autre part, des perçages 13 destinés à recevoir des vis de serrage axial sur ledit moyeu de roue. La partie radiale de liaison 11 est entourée par une bande axiale circulaire 12, de diamètre externe « D » et d'épaisseur sensiblement constante, qui comprend une surface intérieure 12B destinée à former la surface de frottement de garnitures de freinage.  The bowl 10, of generally cylindrical shape, made by stamping and cutting a steel sheet, comprises a radially connecting portion 11, substantially planar, which comprises, on the one hand, a centering bore 14 on the hub, not shown. a wheel, and secondly, holes 13 for receiving axial clamping screws on said wheel hub. The radial connecting portion 11 is surrounded by a circular axial strip 12, of external diameter "D" and of substantially constant thickness, which comprises an inner surface 12B intended to form the friction surface of brake linings.
La figure 2 représente un insert métallique, de référence générale 20, constitué principalement par une bande circulaire 21, continue, en tôle, qui est de section transversale constante d'épaisseur « e ». L'insert métallique 20 comporte deux rangées de perçages 25 répartis régulièrement sur la totalité de la périphérie de la bande circulaire 21. La référence 22 désigne un rebord latéral périphérique prolongeant la bande circulaire 21, qui est sensiblement à 90° d'angle de ladite bande circulaire 21, c'est-à-dire légèrement incliné par rapport à la direction radiale de 1 'insert. FIG. 2 represents a metal insert, of general reference 20, consisting mainly of a continuous circular sheet metal band 21, which is of constant cross section with a thickness "e". The metal insert 20 has two rows of holes 25 regularly distributed over the entire periphery of the circular band 21. The reference 22 designates a lateral flange peripheral extending the circular band 21, which is substantially 90 ° angle of said circular band 21, that is to say slightly inclined relative to the radial direction of 1 insert.
En référence à la figure 3, une première étape d'assemblage des parties constitutives du tambour de frein selon l'invention est constituée par le montage « serré » de l'insert métallique 20 sur la surface extérieure cylindrique 12A de la bande axiale circulaire 12 du bol 10. Ce montage « serré » est réalisé par déformation élastique de l'insert métallique 20.  Referring to Figure 3, a first step of assembling the constituent parts of the brake drum according to the invention is constituted by the "tight" assembly of the metal insert 20 on the cylindrical outer surface 12A of the circular axial strip 12 of the bowl 10. This "tight" assembly is produced by elastic deformation of the metal insert 20.
L'étape suivante de la réalisation du tambour de frein selon l'invention est décrite ci-après en référence aux dessins des figures 4 et 5. La surface externe périphérique de l'ensemble constitué par le bol 10 et l'insert métallique 20 assemblés reçoit par surmoulage une couronne en aluminium ou en alliage d'aluminium de référence générale 30, d'épaisseur radiale « s » hors les bossages ou nervures de moulage 30A. Lors du surmoulage, l'aluminium ou l'alliage d'aluminium de la couronne 30 vient remplir les perçages 25 jusqu'à la bande axiale circulaire 12 du bol 10.  The following step of producing the brake drum according to the invention is described below with reference to the drawings of FIGS. 4 and 5. The outer peripheral surface of the assembly constituted by the bowl 10 and the metal insert 20 assembled receives by overmoulding an aluminum or aluminum alloy ring of general reference 30, radial thickness "s" out of the bosses or molding ribs 30A. During overmoulding, the aluminum or aluminum alloy of the ring 30 fills the holes 25 to the circular axial strip 12 of the bowl 10.
Le tambour de frein, brut de surmoulage, est représenté sur le dessin de la figure 7, avec ses bossages ou nervures de moulage 30A.  The brake drum, overmoulding gross, is shown in the drawing of Figure 7, with its bosses or molding ribs 30A.
Après le surmoulage de la couronne 30, des usinages complémentaires de finition sont réalisés sur l'ensemble ainsi assemblé (figure 8) . En particulier, il peut être réalisé un usinage de finition de l'alésage de centrage 14 seulement ébauché lors de la fabrication du bol 10, et une opération de finition de la surface externe 30B du surmoulage 30. Il peut également être réalisé une opération de rectification de la surface cylindrique intérieure 12B de la bande circulaire 12 servant au frottement des garnitures de frein. Ces usinages de finition permettent d'obtenir une géométrie précise des surfaces fonctionnelles concernées, qui ont pu être déformées lors de la phase de surmoulage de la couronne 30. Pour assurer une bonne liaison mécanique de la couronne surmoulée 30 sur 1 'insert métallique 20 et une bonne fiabilité de cette liaison, différents paramètres géométriques représentés sur le schéma de la figure 6 peuvent être ajustés. Ainsi, parmi ces variables d'a ustement, on peut citer la longueur axiale « X », la largeur radiale « L » et l'épaisseur « e » de l' insert métallique 20, le nombre et le diamètre « 0 » des perçages 25 et leur disposition sur la bande circulaire 21. After overmolding of the crown 30, complementary finishing machining is performed on the assembly thus assembled (Figure 8). In particular, it can be achieved a finishing machining of the centering bore 14 only roughed during the manufacture of the bowl 10, and a finishing operation of the outer surface 30B of the overmoulding 30. It can also be carried out an operation of rectification of the inner cylindrical surface 12B of the circular strip 12 for the friction of the brake linings. These finishing machining operations make it possible to obtain a precise geometry of the functional surfaces concerned, which may have been deformed during the overmolding phase of the crown 30. To ensure a good mechanical connection of the overmolded ring 30 to the metal insert 20 and good reliability of this connection, various geometrical parameters shown in the diagram of FIG. 6 can be adjusted. Thus, among these variables d'austement, we can cite the axial length "X", the radial width "L" and the thickness "e" of the metal insert 20, the number and the diameter "0" of the holes 25 and their arrangement on the circular band 21.
En particulier, les perçages 25, réalisés par usinage ou poinçonnage, peuvent être répartis de manière régulière et sur plusieurs rangées sur toute la périphérie de la bande circulaire 21, par exemple sur deux rangées, comme représenté sur la figure 2. Ces perçages 25 peuvent être inclinés ou non par rapport au plan de la bande circulaire 21. De plus, les perçages 25 peuvent, en variante, ne pas être alignés transversalement, mais être disposés en quinconce, par exemple.  In particular, the holes 25, made by machining or punching, can be evenly distributed over several rows over the entire periphery of the circular band 21, for example in two rows, as shown in FIG. be inclined or not with respect to the plane of the circular band 21. In addition, the holes 25 may, alternatively, not be aligned transversely, but be arranged staggered, for example.
Comme représenté également sur le schéma de la figure 6 notamment, la bande circulaire 21 constitutive de l 'insert métallique 20 est de forme conique à faible conicité tournée vers la direction opposée à la partie centrale de liaison 11 du bol 10 en position assemblée de l 'insert métallique 20 sur le bol 10. Cette conicité, d'angle « a », peut être, à titre d'exemple non limitatif de l'objet et de la portée de la présente invention, de l'ordre de 5° d'angle.  As also shown in the diagram of Figure 6 in particular, the circular band 21 constituting the metal insert 20 is of conical shape with low conicity facing the direction opposite to the central connecting portion 11 of the bowl 10 in the assembled position of the metal insert 20 on the bowl 10. This conicity, angle "a", may be, by way of non-limiting example of the object and scope of the present invention, of the order of 5 ° d 'angle.
Le fonctionnement du tambour de frein décrit ci-dessus est identique à celui d'un tambour de frein classique en fonte, la chaleur dégagée sur la surface de frottement étant stockée dans l'aluminium au lieu d'être stockée dans la fonte .  The operation of the brake drum described above is identical to that of a conventional cast iron brake drum, the heat generated on the friction surface being stored in the aluminum instead of being stored in the cast iron.
Le tambour de frein décrit ci-dessus présente les avantages suivants :  The brake drum described above has the following advantages:
- grâce à son insert métallique, aux caractéristiques dimensionnelles et fonctionnelles de ce dernier, le tambour de l'invention a une excellente tenue mécanique et emmagasine bien la chaleur créée par le frottement au freinage , thanks to its metallic insert, to the dimensional and functional characteristics of the latter, the drum of the invention has excellent mechanical strength and stores the heat created by the friction while braking,
- il présente un réel gain en masse par rapport aux tambours de l'art antérieur tout en ayant des caractéristiques thermiques et mécaniques qui sont équivalentes à celles des tambours en fonte de l'art antérieur ,  it presents a real gain in mass compared to the drums of the prior art while having thermal and mechanical characteristics which are equivalent to those of the cast iron drums of the prior art,
- il offre une excellente dissipation de la chaleur lors du freinage, meilleure que dans les tambours « bi- matière » de l'art antérieur, et  it offers excellent heat dissipation during braking, which is better than in the "bi-material" drums of the prior art, and
- il est de conception et de réalisation simples, et par conséquent économique.  - it is of simple design and realization, and therefore economical.

Claims

REVENDICATIONS
1. Tambour de frein perfectionné pour véhicule, en particulier pour véhicule automobile, qui comporte un bol (10), cylindrique, comprenant une partie radiale de liaison (11) entourée par une bande axiale circulaire (12), un insert (20) métallique comprenant une bande circulaire (21) assemblée à force sur la surface externe (12A) de la bande axiale circulaire (12) du bol (10) et une couronne (30) métallique surmoulée sur la surface périphérique externe de l'assemblage formé par l'insert métallique (20) et le bol (10) .  An improved brake drum for a vehicle, particularly for a motor vehicle, comprising a cylindrical bowl (10) comprising a radial connecting part (11) surrounded by a circular axial band (12), a metal insert (20). comprising a circular band (21) forcibly joined to the outer surface (12A) of the circular axial strip (12) of the bowl (10) and a metal ring (30) overmolded on the outer peripheral surface of the assembly formed by the metal insert (20) and the bowl (10).
2. Tambour de frein selon la revendication 1, caractérisé en ce que ledit bol (10) est formé d'une tôle d'acier, mise en forme par emboutissage et par découpe.  2. Drum brake according to claim 1, characterized in that said bowl (10) is formed of a steel sheet, shaped by stamping and cutting.
3. Tambour de frein selon l'une quelconque des revendications 1 et 2, caractérisé en ce que ledit insert métallique (20) est formé d'une tôle d'acier, mise en forme par emboutissage, ou est formé en acier, mis en forme par usinage par enlèvement de matière.  3. Drum brake according to any one of claims 1 and 2, characterized in that said metal insert (20) is formed of a steel sheet, shaped by stamping, or is formed of steel, set form by machining by removal of material.
4. Tambour de frein selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit insert métallique (20) et le bol (10) sont assemblés par frettage ou par emmanchement à force.  4. Drum brake according to any one of claims 1 to 3, characterized in that said metal insert (20) and the bowl (10) are assembled by shrinking or press fitting.
5. Tambour de frein selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ladite couronne 5. Brake drum according to any one of claims 1 to 4, characterized in that said crown
(30) est en aluminium ou en alliage d'aluminium. (30) is made of aluminum or aluminum alloy.
6. Tambour de frein selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit insert métallique (20) présente des perçages (25) sur sa bande circulaire (21).  6. Drum brake according to any one of claims 1 to 5, characterized in that said metal insert (20) has holes (25) on its circular band (21).
7. Tambour de frein selon la revendication 6, caractérisé en ce que lesdits perçages (25) sont répartis de manière régulière sur toute la surface périphérique de ladite bande circulaire (21) .  7. Drum brake according to claim 6, characterized in that said bores (25) are evenly distributed over the entire peripheral surface of said circular band (21).
8. Tambour de frein selon la revendication 6 ou 7, caractérisé en ce que lesdits perçages (25) sont repartis sur plusieurs rangées. 8. Drum brake according to claim 6 or 7, characterized in that said bores (25) are distributed over several rows.
9. Tambour de frein selon la revendication 8, caractérisé en ce que le nombre de rangées est de deux. Brake drum according to Claim 8, characterized in that the number of rows is two.
10. Tambour de frein selon l'une quelconque des revendications 1 à 9, caractérisé en ce que ladite bande circulaire (21) constitutive de l'insert métallique (20) est de forme légèrement conique à conicité tournée vers la direction opposée à la partie centrale de liaison (11) du bol (10) en position assemblée de l'insert métallique (20) sur le bol (10).  10. Drum brake according to any one of claims 1 to 9, characterized in that said circular band (21) constituting the metal insert (20) is slightly conical shape tapered towards the direction opposite to the part central unit (11) of the bowl (10) in the assembled position of the metal insert (20) on the bowl (10).
11. Tambour de frein selon la revendication 10, caractérisé en ce que ladite conicité (« a ») est de l'ordre de 5° d'angle.  11. Brake drum according to claim 10, characterized in that said taper ("a") is of the order of 5 ° angle.
12. Procédé de réalisation d'un tambour de frein conforme à l'une quelconque des revendications précédentes, caractérisé par les étapes suivantes, prise en combinaison :  12. A method of producing a brake drum according to any one of the preceding claims, characterized by the following steps, taken in combination:
- réalisation du bol (10),  - realization of the bowl (10),
- réalisation de l'insert métallique (20),  - realization of the metal insert (20),
- assemblage à force de l'insert métallique (20) sur le bol (10) ,  - force assembly of the metal insert (20) on the bowl (10),
- surmoulage de la couronne (30) sur l'ensemble assemblé de l'insert métallique (20) et du bol (10) .  - overmoulding of the ring (30) on the assembled assembly of the metal insert (20) and the bowl (10).
13. Véhicule, en particulier véhicule automobile, équipé de freins à tambour, caractérisé en ce qu'au moins un tambour de frein est conforme à l'une quelconque des revendications 1 à 11.  Vehicle, in particular a motor vehicle, equipped with drum brakes, characterized in that at least one brake drum is in accordance with any one of claims 1 to 11.
PCT/FR2013/050247 2012-02-10 2013-02-06 Improved brake drum for a vehicle WO2013117858A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380008612.9A CN104583636A (en) 2012-02-10 2013-02-06 Improved brake drum for a vehicle
EP13746818.7A EP2888502A2 (en) 2012-02-10 2013-02-06 Improved brake drum for a vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1251269A FR2986841B1 (en) 2012-02-10 2012-02-10 PERFECTED BRAKE DRUM FOR VEHICLE
FR1251269 2012-02-10

Publications (2)

Publication Number Publication Date
WO2013117858A2 true WO2013117858A2 (en) 2013-08-15
WO2013117858A3 WO2013117858A3 (en) 2015-06-04

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PCT/FR2013/050247 WO2013117858A2 (en) 2012-02-10 2013-02-06 Improved brake drum for a vehicle

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EP (1) EP2888502A2 (en)
CN (1) CN104583636A (en)
FR (1) FR2986841B1 (en)
WO (1) WO2013117858A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3115339A1 (en) * 2020-10-16 2022-04-22 Psa Automobiles Sa BRAKING DEVICE COMPRISING A STAMPED METAL BOWL AND VEHICLE COMPRISING SUCH A BRAKING DEVICE
CN117267285A (en) * 2023-11-21 2023-12-22 山西汤荣机械制造股份有限公司 Brake drum convenient to heat dissipation and casting device thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1704033A (en) * 1924-03-11 1929-03-05 Bendix Brake Co Brake drum
US1900844A (en) * 1930-09-20 1933-03-07 Bendix Brake Co Brake drum
US2844229A (en) * 1955-03-31 1958-07-22 Marshall G Whitfield Wire-wound brake drum or disc

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Publication number Priority date Publication date Assignee Title
HUT60020A (en) * 1990-12-07 1992-07-28 Budd Co Brake drum provided with reinforcing part-unit particularly for motor vehicles and method for producing same
CN2709703Y (en) * 2004-03-19 2005-07-13 龙岩畅丰机械制造有限公司 Brake drum with loop
CN2784663Y (en) * 2004-10-13 2006-05-31 赖建辉 Embedded brake drum

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1704033A (en) * 1924-03-11 1929-03-05 Bendix Brake Co Brake drum
US1900844A (en) * 1930-09-20 1933-03-07 Bendix Brake Co Brake drum
US2844229A (en) * 1955-03-31 1958-07-22 Marshall G Whitfield Wire-wound brake drum or disc

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3115339A1 (en) * 2020-10-16 2022-04-22 Psa Automobiles Sa BRAKING DEVICE COMPRISING A STAMPED METAL BOWL AND VEHICLE COMPRISING SUCH A BRAKING DEVICE
CN117267285A (en) * 2023-11-21 2023-12-22 山西汤荣机械制造股份有限公司 Brake drum convenient to heat dissipation and casting device thereof
CN117267285B (en) * 2023-11-21 2024-02-02 山西汤荣机械制造股份有限公司 Brake drum convenient to heat dissipation and casting device thereof

Also Published As

Publication number Publication date
CN104583636A (en) 2015-04-29
WO2013117858A3 (en) 2015-06-04
FR2986841A1 (en) 2013-08-16
FR2986841B1 (en) 2014-03-28
EP2888502A2 (en) 2015-07-01

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