WO2003064881A1 - Brake pad for a disc brake comprising different friction materials - Google Patents
Brake pad for a disc brake comprising different friction materials Download PDFInfo
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- WO2003064881A1 WO2003064881A1 PCT/EP2003/000718 EP0300718W WO03064881A1 WO 2003064881 A1 WO2003064881 A1 WO 2003064881A1 EP 0300718 W EP0300718 W EP 0300718W WO 03064881 A1 WO03064881 A1 WO 03064881A1
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- Prior art keywords
- friction
- friction material
- cfc
- brake
- brake pad
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Classifications
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- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/023—Composite materials containing carbon and carbon fibres or fibres made of carbonizable material
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- 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
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
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- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
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- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/002—Combination of different friction materials
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- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/005—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces having a layered structure
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- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/0441—Mechanical interlocking, e.g. roughened lining carrier, mating profiles on friction material and lining carrier
Definitions
- a brake body or brake pad for a disc brake which has a friction lining carrier on which at least two friction bodies are arranged, which consist of friction materials with different friction characteristics, on the one hand from an organic or plastic-bonded friction material first friction body and a second friction body made of carbon fiber composite material. Practical testing has shown that the combined arrangement of a plastic-bonded friction material with a carbon fiber composite friction material can significantly improve the performance and service life of a brake as a result of the different friction characteristics, the different wear behavior and in particular the different temperature behavior.
- the invention has for its object to provide a brake pad of the type mentioned, the inexpensive is to be produced and also has advantages over the known brake body in use.
- a brake block for a disc brake which has a support plate made of a metal material that can be attached to at least one pressure piston of a brake caliper, on which a friction lining made of an organically bound friction material is fastened with a friction surface assigned to the brake disc and which has at least one recess in its friction surface into which a block made of a CFC friction material is inserted, the friction surface of which is formed at the same level as the friction surface of the organically bound friction material, the recess being at least partially delimited at the edge by the organically bound friction material and wherein the block of CFC friction material is also held in a form-fitting manner in the recess.
- the advantage of this embodiment is that a direct, firm connection between the carrier plate and the block made of CFC friction material is no longer required, since this is held by the positive engagement of the organic friction material surrounding it on the edge.
- the block of CFC friction material can be inserted, for example, into the recess in the organically bound friction material previously pressed onto the carrier plate. Since the organically bound friction material usually used for such brakes has a significantly higher coefficient of thermal expansion than the CFC friction material, it can also be expedient for the production to heat the carrier plate, which is initially pressed with the organically bound friction material and provided with the recess, so that at corresponding specification of the outer dimension of the block made of CFC friction material on the one hand (oversize) and the recess in the organically bound friction material on the other hand (undersize), the block made of CFC friction material loose and without
- an intermediate layer made of a material with a lower thermal conductivity than metal is arranged in the region of the recess between the carrier plate and the block made of CFC friction material. It is particularly expedient here if the intermediate layer consists of the organically bound friction material. This has the advantage that no additional material has to be used for the heat-insulating intermediate layer. Furthermore, there is the advantage that when the organically bound friction material is pressed on, the recess can already be formed, so that the pulp block can be produced practically in two or three work steps, namely pressing on the organically bound friction material, possibly with simultaneous shaping of the Recess and Insert the block made of CFC friction material. This can be done, if necessary, after heating the carrier plate pressed with friction material. The thickness of the intermediate layer corresponds at most to the thickness of the carrier plate.
- Fig. 1 is a plan view of the friction surface of a
- Fig. 2 shows a section.
- the brake pad essentially consists of a carrier plate 1 made of a metal, for example steel.
- a first friction lining 2 is made of an organically bonded, ie. H. plastic-bonded friction material is fastened, for example, by pressing this friction material to the surface of the carrier plate 1.
- the usual additives in the form of friction supports, slide supports etc. are integrated in a plastic matrix.
- the organically bound friction material 2 is provided with at least one, here three recesses 3, in each of which a block 4.1, 4.2 and 4.3 made of a CFC friction material is inserted.
- the recess is essentially shaped such that it is delimited all around by the organically bound friction material.
- the recess 3 is not guided down to the carrier plate 1, but when the recess 3 is formed into the organically bound friction material, an intermediate layer 5 made of the organically bound friction material is provided as the base 6, on which the block 4 rests.
- the respective peripheral edge 7 of a recess 3 and the respective peripheral edge 8 of a block 4 each have the same edge contour.
- the transverse dimensions of the block 4 are dimensioned with respect to the recess 3 so that in the cold state of the organically bound friction material or, if necessary, after heating the carrier plate pressed with the organically bound friction material 2, the block 4 is practically loose when the block 4 is assembled in the recess 3 can be inserted.
- the block 4 After assembly, the block 4 is fixed by the friction material 2 in the recess 3, so that the carrier plate for packaging, transport and assembly is reliably secured against falling out. If heated beforehand, the block 4 is secured against falling out for transport and assembly in the manner of a shrink connection. When heated during operation, the shrink connection "loosens" so that the block 4 is held in a form-fitting manner.
- the friction surface 9 of the friction material 2 and the friction surface 10 of the block 4 are at the same level and bear against the counter surface 11.1 of a brake disc 12.
- a second brake pad of the type described above, indicated here by dash-dotted lines bears against the counter surface 11.2 of the brake disc, so that the opposing force between, for example in the form of one or more hydraulic pistons 13, the opposing forces P, which act perpendicularly on the support plate, between the brake pads and the brake disc.
- hydraulic pistons act on both opposite brake blocks on the brake disc or only on one brake block, with the other brake block being pressed on the other side of the brake disc via the floating caliper.
- the blocks 4 can be shaped such that the radial width of the blocks made of CFC friction material, based on the direction of rotation of the brake disc 12, is greater on the inlet side than on its outlet side.
- the friction surface of the CFC block on the inlet side can be larger than the friction surface of the CFC block on the outlet side.
- the friction surface of the CFC friction material is expediently between 40% and 85% of the total friction surface.
- the blocks 4.1, 4.2 and 4.3 made of CFC friction material held in the recesses 3 essentially cover the area of the friction surface which corresponds to the area of the pressure pistons 13 resting on the rear side of the carrier plate 1.
- the frictional performance of such brake pads on a disc brake is also influenced by the temperature distributions on and in the brake pad which change during the braking process.
- a particularly favorable temperature distribution and thus a constant friction even when braking for a long time (downhill) results when the backing plate 1 on its back surface extends beyond the circumferential edge to the plastic-bonded friction lining 2 with a thin coating 15 made from a poorly heat-conducting material Material, for example a ceramic material and above a thin coating 16 made of a good heat-conducting material, for example aluminum. Both coatings can be applied in the so-called plasma spraying process.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Bezeichnung: Bremsklotz für eine Scheibenbremse mit unterschiedlichen ReibmaterialienDescription: Brake pad for a disc brake with different friction materials
Beschreibungdescription
Aus DE-U-296 15 723.6 ist ein Bremskörper bzw. Bremsklotz für eine Scheibenbremse bekannt, der einen Reibbelagträger aufweist, auf dem wenigstens zwei Reibkörper angeordnet sind, die aus Reibmaterialien mit unterschiedlicher Reibcharakteristik bestehen, und zwar zum einen aus einem organisch- bzw. kunststoffgebundenen Reibmaterial ersten Reibkörper und einem aus Kohlefaserverbundwerkstoff bestehenden zweiten Reibkörper. Die praktische Erprobung hat gezeigt, daß durch die kombinierte Anordnung eines kunststoffgebundenen Reibmaterials mit einem Kohlefaserverbund-Reibmaterial infolge der unterschiedlichen Reibcharakteristiken, des unterschiedlichen Verschleißverhaltens und insbesondere des unterschiedlichen Temperaturverhalten die Leistungsfähigkeit und die Standzeit einer Bremse wesentlich verbessert werden kann.From DE-U-296 15 723.6 a brake body or brake pad for a disc brake is known which has a friction lining carrier on which at least two friction bodies are arranged, which consist of friction materials with different friction characteristics, on the one hand from an organic or plastic-bonded friction material first friction body and a second friction body made of carbon fiber composite material. Practical testing has shown that the combined arrangement of a plastic-bonded friction material with a carbon fiber composite friction material can significantly improve the performance and service life of a brake as a result of the different friction characteristics, the different wear behavior and in particular the different temperature behavior.
Es hat sich nun herausgestellt, daß die Befestigung eines Reibkörpers aus Kohlefaserverbundmaterial, auch CFC-Material genannt, auf dem Reibbelagträger erhebliche Probleme bereitet, da, anders als organisch gebundenes Reibmaterial, ein CFC-Material mit den üblicherweise aus Metall, insbesondere Stahl, bestehenden plattenförmigen Reibbelagträgern nicht haltbar verklebt werden kann.It has now been found that the attachment of a friction body made of carbon fiber composite material, also called CFC material, causes considerable problems on the friction lining carrier, since, unlike organically bound friction material, a CFC material with the plate-shaped ones usually made of metal, in particular steel Friction lining carriers can not be glued durable.
Da für den Einsatz an Kraftfahrzeugscheibenbremsen eine Massenproduktion mit niedrigen Herstellungskosten gefordert ist, sind alle Verfahren, die eine mechanische Anbindung des Reibkörpers aus CFC-Material an den Reibbelagträger vorsehen und einen zusätzlichen Arbeitsgang erfordern, aus Kostengründen nicht vertretbar.Since mass production with low manufacturing costs is required for use on motor vehicle disc brakes, all methods which provide for a mechanical connection of the friction body made of CFC material to the friction lining carrier and which require an additional operation are not justifiable for reasons of cost.
Der Erfindung liegt die Aufgabe zugrunde, einen Bremsklotz der eingangs bezeichneten Art zu schaffen, der kostengünstig herzustellen ist und darüber hinaus auch in der Anwendung Vorteile gegenüber dem bekannten Bremskörper aufweist.The invention has for its object to provide a brake pad of the type mentioned, the inexpensive is to be produced and also has advantages over the known brake body in use.
Die Aufgabe wird gemäß der Erfindung gelöst mit einem Bre s- klotz für eine Scheibenbremse, der eine an wenigstens einem Druckkolben einer Bremszange anlegbare Trägerplatte aus einem Metallwerkstoff aufweist, auf dem ein Reibbelag aus einem organisch gebundenen Reibmaterial mit einer der Bremsscheibe zugeordneten Reibfläche befestigt ist und der in seiner Reib- fläche wenigstens eine Ausnehmung aufweist, in die ein Klotz aus einem CFC-Reibmaterial eingesetzt ist, dessen Reibfläche niveaugleich mit der Reibfläche des organisch gebundenen Reibmaterials ausgebildet ist, wobei die Ausnehmung randseitig zumindest teilweise umlaufend vom organisch gebundenen Reibmaterial begrenzt ist und wobei ferner der Klotz aus dem CFC-Reibmaterial formschlüssig in der Ausnehmung gehalten ist. Der Vorteil dieser Ausgestaltung besteht darin, daß eine unmittelbare feste Verbindung zwischen der Trägerplatte und dem Klotz aus CFC-Reibmaterial nicht mehr erforderlich ist, da dieser über den Formschluß des ihn randseitig umfassenden organischen Reibmaterials gehalten wird.The object is achieved according to the invention with a brake block for a disc brake, which has a support plate made of a metal material that can be attached to at least one pressure piston of a brake caliper, on which a friction lining made of an organically bound friction material is fastened with a friction surface assigned to the brake disc and which has at least one recess in its friction surface into which a block made of a CFC friction material is inserted, the friction surface of which is formed at the same level as the friction surface of the organically bound friction material, the recess being at least partially delimited at the edge by the organically bound friction material and wherein the block of CFC friction material is also held in a form-fitting manner in the recess. The advantage of this embodiment is that a direct, firm connection between the carrier plate and the block made of CFC friction material is no longer required, since this is held by the positive engagement of the organic friction material surrounding it on the edge.
Bei der Herstellung kann der Klotz aus CFC-Reibmaterial beispielsweise in die Ausnehmung im zuvor auf die Trägerplatte aufgepreßten organisch gebundenen Reibmaterial eingesetzte werden. Da das üblicherweise für derartige Bremsen eingesetzte organisch gebundene Reibmaterial gegenüber dem CFC-Reibmaterial einen deutlich höheren Wärmeausdehnungskoeffizienten aufweist, kann es für die Herstellung auch zweckmäßig sein, die zunächst mit dem organisch gebundenen Reibmaterial bepreßte und mit der Ausnehmung versehene Trägerplatte zu erwärmen, so daß bei entsprechender Vorgabe der Außenabmessung des Klotzes aus CFC-Reibmaterial einerseits (Übermaß) und der Ausnehmung im organisch gebundenen Reibmaterial andererseits (Untermaß), der Klotz aus CFC-Reibmaterial lose und ohneDuring manufacture, the block of CFC friction material can be inserted, for example, into the recess in the organically bound friction material previously pressed onto the carrier plate. Since the organically bound friction material usually used for such brakes has a significantly higher coefficient of thermal expansion than the CFC friction material, it can also be expedient for the production to heat the carrier plate, which is initially pressed with the organically bound friction material and provided with the recess, so that at corresponding specification of the outer dimension of the block made of CFC friction material on the one hand (oversize) and the recess in the organically bound friction material on the other hand (undersize), the block made of CFC friction material loose and without
Kraftaufwand in die Ausnehmung im erwärmten organisch gebundenen Reibmaterial eingefügt werden kann. Nach dem Erkalten ist der Klotz aus CFC-Reibmaterial fest in der Ausnehmung durch das andere Reibmaterial fixiert, so daß für Verpackung, Handhabung und Montage der Klotz aus CFC-Reibmaterial nicht herausfallen kann. Da im Betrieb der Bremsklotz mit seiner Trägerplatte eine erhebliche Erwärmung erfährt, löst sich im Betrieb der randseitige Reibschluß für den Klotz aus CFC- Reibmaterial ohne den Formschluß zu lösen. Damit kann der Klotz aus CFC-Material sich frei an der Bremsscheibe anlegen. Ein sogenannter Hohlschliff der Bremsscheibe sowie ein soge- nannter Schrägverschleiß des Bremsklotzes wird zuverlässig vermieden.Force can be inserted into the recess in the heated organically bound friction material. After cooling the block made of CFC friction material is firmly fixed in the recess by the other friction material, so that the block made of CFC friction material cannot fall out for packaging, handling and assembly. Since the brake pad with its carrier plate experiences considerable heating during operation, the edge-side frictional engagement for the block made of CFC friction material is released during operation without releasing the positive engagement. This allows the block made of CFC material to lie freely on the brake disc. So-called hollow grinding of the brake disc and so-called oblique wear of the brake pad are reliably avoided.
Da der Verschleiß des CFC-Reibmaterials deutlich geringer ist als der Verschleiß des organisch gebundenen Reibmaterials, ist auf der anderen Seite zuverlässig sichergestellt, daß der Bremsklotz mit der Reibfläche beider Reibmaterialien an der Bremsscheibe anliegt. Damit ist auch gewährleistet, daß der anfallende Abrieb des CFC-Reibmaterials auf die Reibfläche des organisch gebundenen Reibmaterials während des Bremsvor- ganges "aufgetragen" wird und hierdurch die mechanischen und thermischen Eigenschaften des organisch gebundenen Reibmaterials verbessert werden.On the other hand, since the wear of the CFC friction material is significantly less than the wear of the organically bound friction material, it is reliably ensured that the brake pad rests on the brake disc with the friction surface of both friction materials. This also ensures that the resulting abrasion of the CFC friction material is "applied" to the friction surface of the organically bound friction material during the braking process and thereby improves the mechanical and thermal properties of the organically bound friction material.
In besonders vorteilhafter Ausgestaltung der Erfindung ist vorgesehen, daß im Bereich der Ausnehmung zwischen der Trägerplatte und dem Klotz aus CFC-Reibmaterial eine Zwischenschicht aus einem Material mit geringerer Wärmeleitfähigkeit als Metall angeordnet ist. Hierbei ist es besonders zweckmäßig, wenn die Zwischenschicht aus dem organisch gebundenen Reibmaterial besteht. Dies hat den Vorteil, daß für die wärmeisolierende Zwischenschicht nicht ein weiteres Material eingesetzt werden muß. Ferner besteht der Vorteil darin, daß beim Aufpressen des organisch gebundenen Reibmaterials die Ausnehmung bereits eingeformt werden kann, so daß der Bre s- klotz praktisch in zwei bzw. drei Arbeitsgängen herstellbar ist, nämlich Aufpressen des organisch gebundenen Reibmaterials, ggf. unter gleichzeitiger Einformung der Ausnehmung und Einfügen des Klotzes aus CFC-Reibmaterial. Dies kann ggf. nach Erwärmung der so mit Reibmaterial bepreßten Trägerplatte erfolgen Die Dicke der Zwischenschicht entspricht maximal der Dicke der Trägerplatte.In a particularly advantageous embodiment of the invention it is provided that an intermediate layer made of a material with a lower thermal conductivity than metal is arranged in the region of the recess between the carrier plate and the block made of CFC friction material. It is particularly expedient here if the intermediate layer consists of the organically bound friction material. This has the advantage that no additional material has to be used for the heat-insulating intermediate layer. Furthermore, there is the advantage that when the organically bound friction material is pressed on, the recess can already be formed, so that the pulp block can be produced practically in two or three work steps, namely pressing on the organically bound friction material, possibly with simultaneous shaping of the Recess and Insert the block made of CFC friction material. This can be done, if necessary, after heating the carrier plate pressed with friction material. The thickness of the intermediate layer corresponds at most to the thickness of the carrier plate.
Weitere Ausgestaltungen der Erfindung und Vorteile sind den Unteransprüchen und der nachfolgenden Beschreibung und Zeichnung eines Ausführungsbeispiels zu entnehmen. Es zeigen:Further refinements of the invention and advantages can be found in the subclaims and the following description and drawing of an exemplary embodiment. Show it:
Fig. 1 eine Aufsicht auf die Reibfläche einesFig. 1 is a plan view of the friction surface of a
Bremsklotzes ,Brake pad,
Fig. 2 einen Schnitt gem. Der Linie II-II in Fig. 1.Fig. 2 shows a section. The line II-II in Fig. 1st
Wie aus der Aufsicht gem. Fig. 1 und dem Schnitt gem. Fig. 2 ersichtlich, besteht der Bremsklotz im wesentlichen aus einer Trägerplatte 1 aus einem Metall, beispielsweise Stahl. Auf die Trägerplatte 1 ist ein erster Reibbelag 2 aus einem organisch gebundenen, d. h. kunststoffgebundenen Reibmaterial be- festigt, beispielsweise durch Aufpressen unter Verklebung dieses Reibmaterials mit der Oberfläche der Trägerplatte 1. Bei diesem ersten Reibbelag sind in einer Kunststoffmatrix die üblichen Zuschlagsstoffe in Form von Reibstützern, Gleit- stützern etc. eingebunden.As per supervision. Fig. 1 and the section acc. 2 shows, the brake pad essentially consists of a carrier plate 1 made of a metal, for example steel. On the carrier plate 1, a first friction lining 2 is made of an organically bonded, ie. H. plastic-bonded friction material is fastened, for example, by pressing this friction material to the surface of the carrier plate 1. With this first friction lining, the usual additives in the form of friction supports, slide supports etc. are integrated in a plastic matrix.
Das organisch gebundene Reibmaterial 2 ist mit wenigstens einer, hier drei Ausnehmungen 3 versehen, in die jeweils ein Klotz 4.1, 4.2 und 4.3 aus einem CFC-Reibmaterial eingesetzt ist. Die Ausnehmung ist im wesentlichen so geformt, daß sie randseitig umlaufend von dem organisch gebundenen Reibmaterial begrenzt ist.The organically bound friction material 2 is provided with at least one, here three recesses 3, in each of which a block 4.1, 4.2 and 4.3 made of a CFC friction material is inserted. The recess is essentially shaped such that it is delimited all around by the organically bound friction material.
Wie der Schnitt gem. Fig. 2 zeigt, ist die Ausnehmung 3 nicht bis auf die Trägerplatte 1 geführt sondern beim Einformen der Ausnehmung 3 in das organisch gebundene Reibmaterial ist eine Zwischenschicht 5 aus dem organisch gebundenen Reibmaterial als Boden 6 vorgesehen, auf dem der Klotz 4 aufliegt. Der jeweils umlaufende Rand 7 einer Ausnehmung 3 sowie der jeweils umlaufende Rand 8 eines Klotzes 4 weisen hierbei jeweils die gleiche Randkontur auf. Die Querabmessungen des Klotzes 4 sind hierbei in bezug auf die Ausnehmung 3 so bemessen, daß in kaltem Zustand des organisch gebundenen Reibmaterials oder ggf. nach Erwärmen der mit dem organisch gebundenen Reibmaterial 2 bepreßten Trägerplatte bei der Montage der Klotz 4 in die Ausnehmung 3 praktisch lose eingefügt werden kann. Nach der Montage ist der Klotz 4 durch das Reibmaterial 2 in der Ausnehmung 3 fixiert, so daß die Trägerplatte für Verpackung, Transport und Montage zuverlässig gegen ein Herausfallen gesichert ist. Bei vorherigem Erwärmen ist der Klotz 4 für Transport und Montage nach Art einer Schrumpfverbindung gegen Herausfallen gesichert. Bei der Erwärmung im Betrieb "löst" sich die Schrumpfverbindung, so daß der Klotz 4 formschlüssig gehalten wird.How the cut acc. 2 shows, the recess 3 is not guided down to the carrier plate 1, but when the recess 3 is formed into the organically bound friction material, an intermediate layer 5 made of the organically bound friction material is provided as the base 6, on which the block 4 rests. The respective peripheral edge 7 of a recess 3 and the respective peripheral edge 8 of a block 4 each have the same edge contour. The transverse dimensions of the block 4 are dimensioned with respect to the recess 3 so that in the cold state of the organically bound friction material or, if necessary, after heating the carrier plate pressed with the organically bound friction material 2, the block 4 is practically loose when the block 4 is assembled in the recess 3 can be inserted. After assembly, the block 4 is fixed by the friction material 2 in the recess 3, so that the carrier plate for packaging, transport and assembly is reliably secured against falling out. If heated beforehand, the block 4 is secured against falling out for transport and assembly in the manner of a shrink connection. When heated during operation, the shrink connection "loosens" so that the block 4 is held in a form-fitting manner.
Die Reibfläche 9 des Reibmaterials 2 sowie die Reibfläche 10 des Klotzes 4 sind niveaugleich und liegen an der Gegenfläche 11.1 einer Bremsschreibe 12 an. Entsprechend liegt ein zweiter Bremsklotz der vorstehend beschriebenen Art, hier strichpunktiert angedeutet, an der Gegenfläche 11.2 der Bremsscheibe an, so daß durch senkrecht auf die Trägerplatte einwirken- de gegeneinander gerichtete Anpreßkräfte P, beispielsweise in Form von einem oder mehreren Hydraulikkolben 13, die Reibkraft zwischen den Bremsklötzen und der Bremsscheibe aufgebracht werden. Je nach Konstruktion der Scheibenbremse als Festsattelbremse oder als Schwimmsattelbremse wirken hydrau- lische Kolben jeweils auf beide an der Bremsscheibe einander gegenüberliegenden Bremsklötze oder nur auf einen Bremsklotz, wobei über den Schwimmsattel der andere Bremsklotz auf der anderen Seite der Bremsscheibe angedrückt wird.The friction surface 9 of the friction material 2 and the friction surface 10 of the block 4 are at the same level and bear against the counter surface 11.1 of a brake disc 12. Correspondingly, a second brake pad of the type described above, indicated here by dash-dotted lines, bears against the counter surface 11.2 of the brake disc, so that the opposing force between, for example in the form of one or more hydraulic pistons 13, the opposing forces P, which act perpendicularly on the support plate, between the brake pads and the brake disc. Depending on the design of the disc brake as a fixed-caliper brake or as a floating-caliper brake, hydraulic pistons act on both opposite brake blocks on the brake disc or only on one brake block, with the other brake block being pressed on the other side of the brake disc via the floating caliper.
Bei Kraftfahrzeugen mit einer Hauptdrehrichtung der Bremsscheibe 12 in einer Richtung können die Klötze 4 so geformt sein, daß die radiale Breite der Klötze aus CFC-Reibmaterial, bezogen auf die Drehrichtung der Bremsscheibe 12, an der Einlaufseite größer ist als an seiner Auslaßseite.In motor vehicles with a main direction of rotation of the brake disc 12 in one direction, the blocks 4 can be shaped such that the radial width of the blocks made of CFC friction material, based on the direction of rotation of the brake disc 12, is greater on the inlet side than on its outlet side.
Bei der Anordnung von wenigstens zwei Klötzen 4 aus CFC- Reibmaterial im organisch gebundenen Reibmaterial, kann die Reibfläche des einlaufseitigen CFC-Klotzes größer sein als die Reibfläche des auslaufseitigen CFC-Klotzes.If at least two blocks 4 made of CFC friction material are arranged in the organically bonded friction material, the friction surface of the CFC block on the inlet side can be larger than the friction surface of the CFC block on the outlet side.
In bezug auf die Gesamtreibfläche des Bremsklotzes beträgt die Reibfläche des CFC-Reibmaterials zweckmäßigerweise zwischen 40% und 85% der Gesamtreibfläche. Wie aus der Aufsicht gem. Fig. 1 ersichtlich, überdecken die in den Ausnehmungen 3 gehaltenen Klötze 4.1, 4.2 und 4.3 aus CFC-Reibmaterial im wesentlichen den Bereich der Reibfläche, der dem Bereich der Anlage der Druckkolben 13 an der Rückseite der Trägerplatte 1 entspricht.With respect to the total friction surface of the brake pad, the friction surface of the CFC friction material is expediently between 40% and 85% of the total friction surface. As per supervision. 1 can be seen, the blocks 4.1, 4.2 and 4.3 made of CFC friction material held in the recesses 3 essentially cover the area of the friction surface which corresponds to the area of the pressure pistons 13 resting on the rear side of the carrier plate 1.
Bei der Anordnung von zwei oder mehr Ausnehmungen 3 zur Aufnahme von Klötzen 4 aus CFC-Reibmaterial ist es zweckmäßig, wenn zwischen benachbarten Ausnehmungen 3 ein Zwischensteg 14 aus dem organisch gebundenen Reibmaterial 2 vorhanden ist.In the arrangement of two or more recesses 3 for receiving blocks 4 made of CFC friction material, it is expedient if an intermediate web 14 made of the organically bound friction material 2 is present between adjacent recesses 3.
Die Reibleistung derartiger Bremsklötze an einer Scheibenbremse wird auch durch die beim Bremsvorgang wechselnden Tem- peraturverteilungen am und im Bremsklotz beeinflußt. Eine besonders günstige Temperaturverteilung und damit eine gleichbleibende Reibleistung auch bei einem längeren Bremsvorgang (Talfahrt) ergibt sich dann, wenn die Trägerplatte 1 auf ihrer Rückenfläche bis über den umlaufenden Rand an den kunst- Stoffgebundenen Reibbelag 2 heranreichend mit einer dünnen Beschichtung 15 aus einem schlecht wärmeleitenden Material, beispielsweise einem keramischen Material und darüber einer dünnen Beschichtung 16 aus einem gut wärmeleitenden Material, beispielsweise Aluminium versehen ist. Beide Beschichtungen können im sogenannten Plasma-Spritzverfahren aufgebracht werden. The frictional performance of such brake pads on a disc brake is also influenced by the temperature distributions on and in the brake pad which change during the braking process. A particularly favorable temperature distribution and thus a constant friction even when braking for a long time (downhill) results when the backing plate 1 on its back surface extends beyond the circumferential edge to the plastic-bonded friction lining 2 with a thin coating 15 made from a poorly heat-conducting material Material, for example a ceramic material and above a thin coating 16 made of a good heat-conducting material, for example aluminum. Both coatings can be applied in the so-called plasma spraying process.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10390298T DE10390298D2 (en) | 2002-01-31 | 2003-01-24 | Brake pad for a disc brake with different friction materials |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20201476.2 | 2002-01-31 | ||
| DE20201476U DE20201476U1 (en) | 2002-01-31 | 2002-01-31 | Brake pad for a disc brake with different friction materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2003064881A1 true WO2003064881A1 (en) | 2003-08-07 |
| WO2003064881B1 WO2003064881B1 (en) | 2004-12-16 |
Family
ID=7967214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2003/000718 Ceased WO2003064881A1 (en) | 2002-01-31 | 2003-01-24 | Brake pad for a disc brake comprising different friction materials |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE20201476U1 (en) |
| WO (1) | WO2003064881A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482087A (en) * | 2014-12-11 | 2015-04-01 | 烟台孚瑞克森汽车部件有限公司 | Non-fired friction coating for brake pad coating and preparing method of non-fired friction coating |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080011562A1 (en) * | 2006-07-11 | 2008-01-17 | Hilbrandt William P | Multiple layer friction material brake pad |
| DE102007036864A1 (en) | 2007-08-06 | 2009-02-12 | Otto Kurt Stahl | Brake disk i.e. motor vehicle brake disk, for e.g. traction vehicle, has hollow material arranged as annular insert part, where material radially extends along middle break area range around middle point of disk for temperature compensation |
| FR3014980B1 (en) * | 2013-12-18 | 2017-05-05 | Peugeot Citroen Automobiles Sa | FRICTION CLUTCH FOR A GEARBOX OF A MOTOR VEHICLE |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB824568A (en) * | 1956-07-06 | 1959-12-02 | American Brake Shoe Co | Improvements in or relating to manufacture of carbon insert brake shoes |
| US3766130A (en) * | 1969-02-14 | 1973-10-16 | Kelsey Hayes Co | Friction lining composition containing fluorocarbon particles |
| EP0191597A1 (en) * | 1985-02-06 | 1986-08-20 | Honda Giken Kogyo Kabushiki Kaisha | Disk brake devices |
| EP0612930A1 (en) * | 1993-01-22 | 1994-08-31 | Christian Stahl | Carbon fibers reinforced carbon friction pad for disk brake |
| US5597053A (en) * | 1995-12-14 | 1997-01-28 | Weng; Dah-Cherng | Brake lining having inserts of chalk infiltrated with rosin |
| DE29615723U1 (en) | 1996-09-10 | 1998-01-15 | Stahl, Christian, Lebring | Brake body for a brake |
| DE29913689U1 (en) * | 1999-08-05 | 1999-10-28 | Stahl, Christian, Lebring | Friction block for a disc brake, in particular a disc brake for rail vehicles |
-
2002
- 2002-01-31 DE DE20201476U patent/DE20201476U1/en not_active Expired - Lifetime
-
2003
- 2003-01-24 WO PCT/EP2003/000718 patent/WO2003064881A1/en not_active Ceased
- 2003-01-24 DE DE10390298T patent/DE10390298D2/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB824568A (en) * | 1956-07-06 | 1959-12-02 | American Brake Shoe Co | Improvements in or relating to manufacture of carbon insert brake shoes |
| US3766130A (en) * | 1969-02-14 | 1973-10-16 | Kelsey Hayes Co | Friction lining composition containing fluorocarbon particles |
| EP0191597A1 (en) * | 1985-02-06 | 1986-08-20 | Honda Giken Kogyo Kabushiki Kaisha | Disk brake devices |
| EP0612930A1 (en) * | 1993-01-22 | 1994-08-31 | Christian Stahl | Carbon fibers reinforced carbon friction pad for disk brake |
| US5597053A (en) * | 1995-12-14 | 1997-01-28 | Weng; Dah-Cherng | Brake lining having inserts of chalk infiltrated with rosin |
| DE29615723U1 (en) | 1996-09-10 | 1998-01-15 | Stahl, Christian, Lebring | Brake body for a brake |
| DE29913689U1 (en) * | 1999-08-05 | 1999-10-28 | Stahl, Christian, Lebring | Friction block for a disc brake, in particular a disc brake for rail vehicles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482087A (en) * | 2014-12-11 | 2015-04-01 | 烟台孚瑞克森汽车部件有限公司 | Non-fired friction coating for brake pad coating and preparing method of non-fired friction coating |
| CN104482087B (en) * | 2014-12-11 | 2017-02-01 | 烟台孚瑞克森汽车部件有限公司 | Non-fired friction coating for brake pad coating and preparing method of non-fired friction coating |
Also Published As
| Publication number | Publication date |
|---|---|
| DE20201476U1 (en) | 2002-04-18 |
| DE10390298D2 (en) | 2004-12-23 |
| WO2003064881B1 (en) | 2004-12-16 |
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