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WO2003019036A1 - Vibration-damped component for a motor vehicle - Google Patents

Vibration-damped component for a motor vehicle Download PDF

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Publication number
WO2003019036A1
WO2003019036A1 PCT/DE2002/002522 DE0202522W WO03019036A1 WO 2003019036 A1 WO2003019036 A1 WO 2003019036A1 DE 0202522 W DE0202522 W DE 0202522W WO 03019036 A1 WO03019036 A1 WO 03019036A1
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WO
WIPO (PCT)
Prior art keywords
brake
vibration
din
component
disc
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.)
Ceased
Application number
PCT/DE2002/002522
Other languages
German (de)
French (fr)
Inventor
Norbert Hoffmann
Michael Fischer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2003019036A1 publication Critical patent/WO2003019036A1/en
Anticipated expiration legal-status Critical
Ceased 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/02—Braking members; Mounting thereof
    • F16D65/12—Discs; Drums for disc 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
    • F16D65/0006—Noise or vibration control
    • 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
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/01—Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand
    • 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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
    • 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
    • F16D2065/1304—Structure
    • F16D2065/1328—Structure internal cavities, e.g. cooling channels

Definitions

  • the invention is based on a vibration-damped component of a motor vehicle, in particular a vibration-damped brake disc, according to the preamble of claim 1, and on a method for producing cast vibration-damped components of a motor vehicle, in particular for the production of cast vibration-damped brake discs according to the preamble of claim 6 ,
  • Braking or corrosion can cause unevenness, ripples or changing friction conditions on the friction surfaces of brake discs, which, when the brake pads are pressed on, lead to vibration excitation and thus to structure-borne noise, in particular to bending vibrations of the brake discs.
  • This structure-borne noise is radiated over the relatively large outer surfaces of the brake disc as airborne noise, which occurs in practice, for example, as an annoying squeaking noise.
  • Brake discs are out Materials with a relatively high material damping are usually made of cast iron or cast steel, but the material damping is not large enough to completely prevent the noise.
  • a brake disc is known from the generic US Pat. No. 5,855,257, in which the damping is increased by additionally attached friction dampers in the form of friction rings arranged on the circumference of the brake disc. The disadvantage here, however, is that, against the background of high operating temperatures, the friction rings can bake with the brake disc and thus the energy-consuming mechanism of the micro friction between the friction ring and the peripheral surface of the brake disc is prevented.
  • the structure-borne sound vibrations of the component caused by vibration excitation simultaneously lead to vibration excitation of the material in the cavities, the high material damping of which leads to a reduction in the vibration energy present in the system and thus to a reduction in the radiated airborne noise.
  • the one filled in the cavities
  • Damping material is a material whose damping behavior is greater than that of the respective component, as is the case, for example, with sand, in particular quartz sand, concrete, bitumen or viscous liquids.
  • sand in particular quartz sand, concrete, bitumen or viscous liquids.
  • the increased friction present at the grain interfaces provides the damping effect, in the case of viscous liquids the dynamic shear forces acting between the liquid layers. Because the damping material is enclosed in cavities, it is insensitive to external influences, which is particularly advantageous in the presence of an aggressive environment.
  • the component is formed by an annular brake disc, which consists of a cup-shaped hub and a brake ring disc.
  • the at least one cavity filled with the damping material is then formed in the brake ring disk and contains blind holes which extend radially inward from a radially outer peripheral surface of the brake ring disk and which are closed by plugs or covers.
  • the blind holes are preferably produced by drilling, then filled with the material with high material damping and closed at the end by core plugs according to DIN 907 or covers according to DIN 442 or DIN 443.
  • a particularly cost-effective production of the vibration-damped component results if it is a cast component according to claim 6, in particular a cast brake disc made of cast steel or spheroidal graphite cast iron.
  • the cavities can then already be produced during the casting of the Brerns disk by using casting cores which are held on the radially inner or radially outer circumferential surface of the brake disk during the casting process by core supports which protrude through openings which act as core support holes.
  • the casting core itself can consist of the material with high material damping and remain in the brake disc after the casting process. Alternatively, the casting core is removed after the casting process and replaced by the material with high material damping.
  • the openings acting as core support holes in the cavities filled with the damping material are preferably closed by core plugs according to DIN 907 or covers according to DIN 442 or DIN 443.
  • FIG. 1 shows a side view of a brake disc as preferred
  • FIG. 2 shows a cross-sectional view along the line II-II of FIG. 1;
  • FIG. 3 shows a side view of a further embodiment of a
  • the brake disc 1 shows a side view of a brake disc 1 as a preferred application example of the invention.
  • the brake disc 1 is preferably designed as a one-piece component made of cast steel and is used for the disc brake system of a motor vehicle.
  • the axis is provided with a cup-shaped hub 2, as can be seen in particular from FIG.
  • a brake ring disc 4 projects from the cup-shaped hub 2 in the radial direction and its plane is perpendicular to the axis of rotation 6 of the cup-shaped hub 2.
  • the side surfaces of the brake ring disc 1 form friction surfaces pointing away from one another
  • blind holes 12 extend radially inwards, preferably up to the immediate vicinity of the radially inner circumferential surface 14.
  • the blind holes 12 are over the entire surface Distributed circumference of the brake ring disc 4 and arranged at a circumferential distance from each other, only a few of the blind holes 12 being shown in FIG. 1 for reasons of clarity. Based on the thickness of the brake ring disc 4 are the
  • the blind holes 12 are at least partially filled with a material 16 with high material damping, such as sand, in particular quartz sand, bitumen, concrete or a viscous viscous liquid, and are sealed at the end by a stopper 18 or cover.
  • the material damping of the material 16 introduced is higher than that of the brake disc material in order to achieve an increase in the overall material damping.
  • Core plugs according to DIN 907 or lids according to DIN 442 or DIN 443 are preferably used as plugs 18 or lids.
  • the blind holes 12 are produced according to the preferred embodiment shown in FIG. 1 and FIG. 2 by drilling. According to a further embodiment, shown in FIGS.
  • the cavities 12 ′ can be radial
  • Extend direction be arranged at a circumferential distance from each other and based on the thickness of the brake ring disc 1 'in the vicinity of the two friction surfaces 8'. In addition, they are separated from one another in the circumferential direction by inner ribs 22 ′.
  • inner ribs 22 ′ As in the embodiment shown in FIGS. 3 and 4, the
  • the casting core 16 'itself consist of the material with high material damping and remain in the brake disc 1' after the casting process.
  • the casting core 16 ' is removed after the casting process and replaced by the material with high material damping.
  • the openings 20 'functioning as core support holes are finally closed preferably by core plugs 18' according to DIN 907 or covers according to DIN 442 or DIN 443.
  • the application of the invention is not limited to brake disks 1, 1 ', rather it can be used for vibration damping for any vibration-excited components of motor vehicles, such as brake calipers, transmission housings, pump housings, engine blocks and the like.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention relates to a vibration-damped component for a motor vehicle, in particular a vibration-damped brake disc. According to the invention, the interior of the component (1) is provided with at least one cavity (12), adjacent to the sound-emitting external surfaces (8) thereof, which is at least partly filled with at least one material (16) with high material damping, such as sand, concrete, bituminous mass or liquid. The cavity (12) can be prepared during the casting process of cast items such as brake discs.

Description

Schwingungsgedämpftes Bauelement eines Kraftfahrzeugs Vibration-damped component of a motor vehicle

Beschreibungdescription

Stand der TechnikState of the art

Die Erfindung geht aus von einem schwingungsgedämpften Bauelement eines Kraftfahrzeugs, insbesondere von einer schwingungsgedämpften Bremsscheibe, gemäß dem Oberbegriff von An- spruch 1 , sowie von einem Verfahren zur Herstellung gegossener schwingungsgedämpfter Bauelemente eines Kraftfahrzeugs, insbesondere zur Herstellung gegossener schwingungsgedämpfter Bremsscheiben gemäß dem Oberbegriff von Anspruch 6.The invention is based on a vibration-damped component of a motor vehicle, in particular a vibration-damped brake disc, according to the preamble of claim 1, and on a method for producing cast vibration-damped components of a motor vehicle, in particular for the production of cast vibration-damped brake discs according to the preamble of claim 6 ,

Bremsvorgänge oder Korrosion können an Reibflächen von Bremsscheiben Unebenheiten, Welligkeiten oder wechselnde Reibungsbedingungen hervorrufen, welche bei angepressten Bremsbelägen zu einer Schwingungserregung und damit zu Körperschall, insbesondere zu Biegeschwingungen der Bremsscheiben führen. Dieser Körperschall wird über die relativ großen Außenflächen der Brems- Scheibe als Luftschall abgestrahlt, der in der Praxis beispielsweise als störendes Quietschgeräusch auftritt. Zwar werden Bremsscheiben aus Materialien mit relativ hoher Werkstoffdämpfung hergestellt und bestehen in der Regel aus Gusseisen oder Stahlguss, jedoch ist die Werkstoffdämpfung nicht groß genug, um die Geräusche vollständig zu unterbinden. Aus der gattungsbildenden US 5,855,257 ist eine Bremsscheibe bekannt, bei welcher die Dämpfung durch zusätzlich angebrachte Reibungsdämpfer in Form von am Umfang der Bremsscheibe angeordneten Reibringen erhöht wird. Nachteilig ist hierbei jedoch, dass vor dem Hintergrund hoher Betriebstemperaturen die Reibringe mit der Brems- scheibe verbacken können und somit der energieverzehrende Mechanismus der Mikroreibung zwischen dem Reibring und der Umfangsflä- che der Bremsscheibe unterbunden wird.Braking or corrosion can cause unevenness, ripples or changing friction conditions on the friction surfaces of brake discs, which, when the brake pads are pressed on, lead to vibration excitation and thus to structure-borne noise, in particular to bending vibrations of the brake discs. This structure-borne noise is radiated over the relatively large outer surfaces of the brake disc as airborne noise, which occurs in practice, for example, as an annoying squeaking noise. Brake discs are out Materials with a relatively high material damping are usually made of cast iron or cast steel, but the material damping is not large enough to completely prevent the noise. A brake disc is known from the generic US Pat. No. 5,855,257, in which the damping is increased by additionally attached friction dampers in the form of friction rings arranged on the circumference of the brake disc. The disadvantage here, however, is that, against the background of high operating temperatures, the friction rings can bake with the brake disc and thus the energy-consuming mechanism of the micro friction between the friction ring and the peripheral surface of the brake disc is prevented.

Vorteile der ErfindungAdvantages of the invention

Die durch Schwingungserregung hervorgerufenen Körperschallschwingungen des Bauelements führen gleichzeitig zu einer Schwingungserregung des in den Hohlräumen befindlichen Materials, dessen hohe Werkstoffdämpfung zu einer Reduzierung der im System vorhandenen Schwingungsenergie und damit auch zur Reduzierung des ab- gestrahlten Luftschalls führt. Bei dem in die Hohlräume eingefülltenThe structure-borne sound vibrations of the component caused by vibration excitation simultaneously lead to vibration excitation of the material in the cavities, the high material damping of which leads to a reduction in the vibration energy present in the system and thus to a reduction in the radiated airborne noise. The one filled in the cavities

Dämpfungsmaterial handelt es sich um Werkstoffe, deren Dämpfungsverhalten größer ist als dasjenige des jeweiligen Bauelements, wie dies beispielsweise bei Sand, insbesondere Quarzsand, Beton, Bitumen oder zähen Flüssigkeiten der Fall ist. Im Falle eines granulären Medi- ums wie beispielsweise Sand oder Quarzsand sorgt die an den Korngrenzflächen vorhandene erhöhte Reibung für den Dämpfungseffekt, im Falle von viskosen Flüssigkeiten die zwischen den Flüssigkeitsschichten wirkenden dynamischen Scherkräfte. Weil das Dämpfungs- material in Hohlräumen eingeschlossen ist, ist es unempfindlich gegenüber äußeren Einflüssen, was insbesondere bei Vorhandensein einer aggressiven Umgebung von Vorteil ist.Damping material is a material whose damping behavior is greater than that of the respective component, as is the case, for example, with sand, in particular quartz sand, concrete, bitumen or viscous liquids. In the case of a granular medium such as sand or quartz sand, the increased friction present at the grain interfaces provides the damping effect, in the case of viscous liquids the dynamic shear forces acting between the liquid layers. Because the damping material is enclosed in cavities, it is insensitive to external influences, which is particularly advantageous in the presence of an aggressive environment.

Als bevorzugte Anwendung der Erfindung wird das Bauelement durch eine ringförmige Bremsscheibe gebildet, welche aus einer topf- förmigen Nabe und einer Bremsringscheibe besteht. Dann ist der zumindest eine, mit dem Dämpfungsmaterial gefüllte Hohlraum in der Bremsringscheibe ausgebildet und beinhaltet sich von einer radial äußeren Umfangsfläche der Bremsringscheibe nach radial innen erstre- ckende Sacklöcher, welche durch Stopfen oder Deckel verschlossen sind. Durch die Erfindung wird es somit möglich, kostengünstige Bremsscheiben aus Gusseisen mit einem hohen Dämpfungsgrad zu versehen, wie ihn sonst nur wesentlich teurere Keramik-Bremsscheiben aufweisen. Vorzugsweise werden die Sacklöcher durch Bohren herge- stellt, danach mit dem Werkstoff mit hoher Materialdämpfung aufgefüllt und endseitig durch Kernstopfen nach DIN 907 oder Deckel nach DIN 442 oder nach DIN 443 verschlossen.As a preferred application of the invention, the component is formed by an annular brake disc, which consists of a cup-shaped hub and a brake ring disc. The at least one cavity filled with the damping material is then formed in the brake ring disk and contains blind holes which extend radially inward from a radially outer peripheral surface of the brake ring disk and which are closed by plugs or covers. The invention thus makes it possible to provide inexpensive cast iron brake discs with a high degree of damping, as otherwise only much more expensive ceramic brake discs have. The blind holes are preferably produced by drilling, then filled with the material with high material damping and closed at the end by core plugs according to DIN 907 or covers according to DIN 442 or DIN 443.

Eine besonders kostengünstige Fertigung des schwingungsgedämpften Bauelements ergibt sich, wenn es sich um ein gegossenes Bauelement gemäß Anspruch 6 handelt, insbesondere um eine gegossene Bremsscheibe aus Stahlguss oder Gusseisen mit Kugelgraphit. Dann können die Hohlräume bereits beim Gießen der Brernsscheibe durch Verwendung von Gießkernen hergestellt werden, welche während des Gießprozesses an der radial inneren oder radial äußreren Um- fangsfläche der Bremsscheibe durch Kernstützen gehalten sind, die durch als Kernstützlöcher fungierende Öffnungen ragen. Dabei kann der Gießkern selbst aus dem Material mit hoher Werkstoffdämpfung bestehen und nach dem Gießvorgang in der Bremsscheibe verbleiben. Alternativ wird der Gießkerπ nach dem Gießvorgang entfernt und durch das Material mit hoher Werkstoffdämpfuπg ersetzt. Abschließend werden die als Kernstützlöcher fungierenden Öffnungen der mit dem Dämpfungswerkstoff gefüllten Hohlräume vorzugsweise durch Kernstopfen nach DIN 907 oder Deckel nach DIN 442 oder nach DIN 443 verschlossen.A particularly cost-effective production of the vibration-damped component results if it is a cast component according to claim 6, in particular a cast brake disc made of cast steel or spheroidal graphite cast iron. The cavities can then already be produced during the casting of the Brerns disk by using casting cores which are held on the radially inner or radially outer circumferential surface of the brake disk during the casting process by core supports which protrude through openings which act as core support holes. The casting core itself can consist of the material with high material damping and remain in the brake disc after the casting process. Alternatively, the casting core is removed after the casting process and replaced by the material with high material damping. Finally, the openings acting as core support holes in the cavities filled with the damping material are preferably closed by core plugs according to DIN 907 or covers according to DIN 442 or DIN 443.

Zeichnungendrawings

Ausführungsbeispiele der Erfindung sind in der Zeichnung dar- gestellt und in der nachfolgenden Beschreibung näher erläutert. In denExemplary embodiments of the invention are shown in the drawing and explained in more detail in the following description. In the

Zeichnungen zeigtShows drawings

Fig.1 eine Seitenansicht einer Bremsscheibe als bevorzugtes1 shows a side view of a brake disc as preferred

Ausführungsbeispiel der Erfindung;Embodiment of the invention;

Fig.2 eine Querschnittsdarstellung entlang der Linie ll-ll von Fig.1 ;2 shows a cross-sectional view along the line II-II of FIG. 1;

Fig.3 eine Seitenansicht einer weiteren Ausführungsform einer3 shows a side view of a further embodiment of a

Bremsscheibe;brake disc;

Fig.4 eine Querschnittsdarstellung entlang der Linie IV-IV von4 shows a cross-sectional view along the line IV-IV of

Fig.3.Figure 3.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Fig.1 ist in einer Seitenansicht eine Bremsscheibe 1 als bevorzugtes Anwendungsbeispiel der Erfindung dargestellt. Die Bremsscheibe 1 ist vorzugsweise als einstückiges Bauteil aus Stahl guss aus- gebildet und dient für die Scheibenbremsanlage eines Kraftfahrzeugs.1 shows a side view of a brake disc 1 as a preferred application example of the invention. The brake disc 1 is preferably designed as a one-piece component made of cast steel and is used for the disc brake system of a motor vehicle.

Für die Befestigung der Bremsscheibe 1 an einer nicht dargestellten Achse ist diese mit einer topfförmigen Nabe 2 versehen, wie insbesondere aus Fig.2 hervorgeht. Von der topfförmigen Nabe 2 ragt in radialer Richtung eine Bremsringscheibe 4 weg, deren Ebene senkrecht zur Rotationsachse 6 der topfförmigen Nabe 2 verläuft. Die Seitenflächen der Bremsringscheibe 1 bilden voneinander weg weisende ReibflächenFor the attachment of the brake disc 1 to a not shown The axis is provided with a cup-shaped hub 2, as can be seen in particular from FIG. A brake ring disc 4 projects from the cup-shaped hub 2 in the radial direction and its plane is perpendicular to the axis of rotation 6 of the cup-shaped hub 2. The side surfaces of the brake ring disc 1 form friction surfaces pointing away from one another

8 für in den Figuren nicht dargestellte Bremsbeläge der Scheibenbremsanlage.8 for brake pads of the disc brake system, not shown in the figures.

Wie anhand von Fig.1 und Fig.2 hervorgeht, erstrecken sich ausgehend von einer radial äußeren Umfangsfläche 10 der Bremsring- scheibe 4 Sacklöcher 12 nach radial innen, vorzugsweise bis in unmittelbare Nachbarschaft der radial inneren Umfangsfläche 14. Die Sacklöcher 12 sind über den gesamten Umfang der Bremsringscheibe 4 verteilt und mit Umfangsabstand zueinander angeordnet, wobei in Fig.1 aus Übersichtlichkeitsgründen nur einige der Sacklöcher 12 dargestellt sind. Bezogen auf die Dicke der Bremsringscheibe 4 befinden sich dieAs can be seen from FIGS. 1 and 2, starting from a radially outer circumferential surface 10 of the brake ring disk 4, blind holes 12 extend radially inwards, preferably up to the immediate vicinity of the radially inner circumferential surface 14. The blind holes 12 are over the entire surface Distributed circumference of the brake ring disc 4 and arranged at a circumferential distance from each other, only a few of the blind holes 12 being shown in FIG. 1 for reasons of clarity. Based on the thickness of the brake ring disc 4 are the

Sacklöcher 12 angrenzend oder in Nachbarschaft zu den beiden Reibflächen 8, wie insbesondere Fig.2 zeigt.Blind holes 12 adjoining or in the vicinity of the two friction surfaces 8, as shown in particular in FIG.

Die Sacklöcher 12 sind zumindest teilweise mit einem Material 16 mit hoher Werkstoffdämpfung, wie beispielsweise Sand, insbeson- dere Quarzsand, Bitumen, Beton oder einer viskos zähen Flüssigkeit gefüllt und endseitig durch einen Stopfen 18 oder Deckel dicht verschlossen. Die Materialdämpfung des eingebrachten Werkstoffs 16 ist dabei höher als diejenige des Bremsscheibenwerkstoffs, um eine Erhöhung der Gesamtwerkstoffdämpfung zu erzielen. Als Stopfen 18 oder Deckel werden vorzugsweise Kernstopfen nach DIN 907 oder Deckel nach DIN 442 oder nach DIN 443 verwendet. Die Sacklöcher 12 werden gemäß der in Fig.1 und Fig.2 dargestellten bevorzugten Ausführungsform durch Bohren hergestellt. Gemäß einer in Fig.3 und Fig.4 gezeigten weiteren Ausführungsform einer aus einer topfförmigen Nabe 2' und einer Bremsringscheibe 4' bestehenden Bremsscheibe 1 ' werden die mit Dämpfungsmaterial befüllbaren Hohlräume 12' beim Gießen der Bremsscheibe 1 ' durch Verwendung von Gießkernen 16' gefertigt, welche während desThe blind holes 12 are at least partially filled with a material 16 with high material damping, such as sand, in particular quartz sand, bitumen, concrete or a viscous viscous liquid, and are sealed at the end by a stopper 18 or cover. The material damping of the material 16 introduced is higher than that of the brake disc material in order to achieve an increase in the overall material damping. Core plugs according to DIN 907 or lids according to DIN 442 or DIN 443 are preferably used as plugs 18 or lids. The blind holes 12 are produced according to the preferred embodiment shown in FIG. 1 and FIG. 2 by drilling. According to a further embodiment, shown in FIGS. 3 and 4, of a brake disk 1 'consisting of a cup-shaped hub 2' and a brake ring disk 4 ', the cavities 12' which can be filled with damping material are produced when casting the brake disk 1 'by using casting cores 16' which during the

Gießprozesses an der radial inneren Umfangsfläche 14' der Bremsscheibe 1 ' durch nicht dargestellte Kernstützen gehalten sind, die durch als Kernstützlöcher fungierende Öffnungen 20' an der radial inneren Umfangsfläche 14' ragen. Die Hohlräume 12' können sich wie beim vorangehend beschriebenen Ausführungsbeispiel in radialerCasting process on the radially inner peripheral surface 14 'of the brake disc 1' are held by core supports, not shown, which protrude through openings 20 'acting as core support holes on the radially inner peripheral surface 14'. As in the exemplary embodiment described above, the cavities 12 ′ can be radial

Richtung erstrecken, mit Umfangsabstand zueinander angeordnet und bezogen auf die Dicke der Bremsringscheibe 1 ' in Nachbarschaft zu den beiden Reibflächen 8' angeordnet sein. Darüber hinaus sind sie in Umfangsrichtung durch innere Rippen 22' voneinander getrennt. Hier- bei kann, wie bei der in Fig.3 und Fig.4 gezeigten Ausführungsform derExtend direction, be arranged at a circumferential distance from each other and based on the thickness of the brake ring disc 1 'in the vicinity of the two friction surfaces 8'. In addition, they are separated from one another in the circumferential direction by inner ribs 22 ′. Here, as in the embodiment shown in FIGS. 3 and 4, the

Fall ist, der Gießkern 16' selbst aus dem Werkstoff mit hoher Materialdämpfung bestehen und nach dem Gießvorgang in der Bremsscheibe 1 ' verbleiben. Alternativ wird der Gießkern 16' nach dem Gießvorgang entfernt und durch den Werkstoff mit hoher Materialdämpfung ersetzt. Die als Kernstützlöcher fungierenden Öffnungen 20' werden abschließend vorzugsweise durch Kernstopfen 18' nach DIN 907 oder Deckel nach DIN 442 oder nach DIN 443 verschlossen.The case is, the casting core 16 'itself consist of the material with high material damping and remain in the brake disc 1' after the casting process. Alternatively, the casting core 16 'is removed after the casting process and replaced by the material with high material damping. The openings 20 'functioning as core support holes are finally closed preferably by core plugs 18' according to DIN 907 or covers according to DIN 442 or DIN 443.

Die Anwendung der Erfindung ist nicht auf Bremsscheiben 1 , 1 ' beschränkt, vielmehr kann sie zur Schwingungsdämpfung für beliebige schwingungserregte Bauelemente von Kraftfahrzeugen wie beispielsweise Bremssättel, Getriebegehäuse, Pumpengehäuse, Motorblöcke und dergleichen eingesetzt werden. The application of the invention is not limited to brake disks 1, 1 ', rather it can be used for vibration damping for any vibration-excited components of motor vehicles, such as brake calipers, transmission housings, pump housings, engine blocks and the like.

Claims

Patentansprüche claims 1. Schwingungsgedämpftes Bauelement eines Kraftfahrzeugs, insbesondere schwiπgungsgedämpfte Bremsscheibe, dadurch gekennzeichnet, dass im Inneren des Bauelements (1 ; 1 ') und angrenzend an des- sen schallabstrahlende Außenflächen (8; 8') wenigstens ein geschlossener, zumindest teilweise mit mindestens einem Material (16, 16') mit hoher Werkstoffdämpfung wie beispielsweise Sand, Beton, Bitumenmasse oder Flüssigkeit gefüllter Hohlraum (12; 12') vorgesehen ist.1. Vibration-damped component of a motor vehicle, in particular vibration-damped brake disc, characterized in that in the interior of the component (1; 1 ') and adjacent to its sound-radiating outer surfaces (8; 8') at least one closed, at least partially with at least one material ( 16, 16 ') with high material damping such as sand, concrete, bitumen or liquid-filled cavity (12; 12') is provided. 2. Bauelement nach Anspruch 1 , dadurch gekennzeichnet, dass es durch eine einstückige Bremsscheibe (1 ; 1 ') aus Stahlguß oder Gußeisen mit Kugelgraphit gebildet wird, welche aus einer topfförmigen Nabe (2; 2') und einer Bremsringscheibe (4; 4') besteht.2. Component according to claim 1, characterized in that it is formed by a one-piece brake disc (1; 1 ') made of cast steel or cast iron with nodular graphite, which consists of a cup-shaped hub (2; 2') and a brake ring disc (4; 4 ' ) consists. 3. Bauelement nach Anspruch 2, dadurch gekennzeichnet, dass der zumindest eine Hohlraum (12) in der Bremsringscheibe (4) ausgebildet ist und sich von einer radial äußeren Umfangsfläche (10) der Bremsringscheibe nach radial innen erstreckende Sacklöcher (12) beinhaltet, welche durch Stopfen (18) oder Deckel verschlossen sind.3. Component according to claim 2, characterized in that the at least one cavity (12) is formed in the brake ring disc (4) and from a radially outer circumferential surface (10) of the brake ring disc includes radially inwardly extending blind holes (12), which through Plug (18) or cover are closed. Bauelement nach Anspruch 3, dadurch gekennzeichnet, dass die Sacklöcher (12) durch Bohren hergestellt sind. Component according to claim 3, characterized in that the blind holes (12) are made by drilling. 5. Bauelement nach Anspruch 4, dadurch gekennzeichnet, dass die Stopfen durch Kernstopfen (18) nach DIN 907 und die Deckel durch Deckel nach DIN 442 oder nach DIN 443 gebildet werden.5. The component according to claim 4, characterized in that the plugs are formed by core plugs (18) according to DIN 907 and the covers by covers according to DIN 442 or DIN 443. 6. Verfahren zur Herstellung gegossener schwingungsgedämpfter Bauelemente eines Kraftfahrzeugs, insbesondere zur Herstellung gegossener schwingungsgedämpfter Bremsscheiben, dadurch gekennzeichnet, dass während des Gießprozesses im Inneren des Bauelements (1 ; 1') und angrenzend an dessen schallabstrahlende Außenflä- chen (8; 8') wenigstens ein geschlossener, zumindest teilweise mit mindestens einem Material (16; 16') mit hoher Werkstoffdämpfung wie beispielsweise Sand, Beton, Bitumenmasse oder Flüssigkeit befüllbarer Hohlraum (12; 12') hergestellt wird.6. A method for producing cast vibration-damped components of a motor vehicle, in particular for producing cast vibration-damped brake discs, characterized in that at least during the casting process inside the component (1; 1 ') and adjacent to its sound-radiating outer surfaces (8; 8') a closed cavity (12; 12 ') that can be filled at least partially with at least one material (16; 16') with high material damping such as sand, concrete, bitumen mass or liquid is produced. 7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das gegossene schwingungsgedämpfte Bauelement durch eine einstückige Bremsscheibe (1; 1') aus Stahlguß oder Gußeisen mit Kugelgraphit gebildet wird, welche aus einer topfförmigen Nabe (2; 2') und einer Bremsringscheibe (4; 4') besteht.7. The method according to claim 6, characterized in that the cast vibration-damped component is formed by a one-piece brake disc (1; 1 ') made of cast steel or cast iron with nodular graphite, which consists of a cup-shaped hub (2; 2') and a brake ring disc (4th ; 4 ') exists. 8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass die Hohlräume (12') in der Bremsringscheibe (4') ausgebildet und durch Verwendung von Gießkernen gefertigt sind, welche während des Gießprozesses an der radial inneren Umfangsfläche (14') der Brems ringschei- be (4') durch Kernstützen gehalten sind, die durch als Kernstützlöcher fungierende Öffnungen (20') ragen. 8. The method according to claim 7, characterized in that the cavities (12 ') in the brake ring disc (4') are formed and manufactured by using casting cores, which during the casting process on the radially inner peripheral surface (14 ') of the brake disc be (4 ') are held by core supports which protrude through openings (20') which act as core support holes. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass der Gießkern aus dem Material (16') mit hoher Werkstoffdämpfung besteht und nach dem Gießvorgang in der Bremsscheibe (1 ') verbleibt.9. The method according to claim 8, characterized in that the casting core consists of the material (16 ') with high material damping and remains in the brake disc (1') after the casting process. 10. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass der Gießkern nach dem Gießvorgang entfernt und durch das Material (16') mit hoher Werkstoffdämpfung ersetzt wird.10. The method according to claim 8, characterized in that the casting core is removed after the casting process and replaced by the material (16 ') with high material damping. 11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die als Kernstützlöcher fungierenden Öffnungen (20') durch Kernstopfen (18') nach DIN 907 oder durch Deckel nach DIN 442 oder DIN 443 verschlossen werden. 11. The method according to claim 9 or 10, characterized in that the openings acting as core support holes (20 ') are closed by core plugs (18') according to DIN 907 or by covers according to DIN 442 or DIN 443.
PCT/DE2002/002522 2001-08-25 2002-07-10 Vibration-damped component for a motor vehicle Ceased WO2003019036A1 (en)

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DE10141698.9 2001-08-25
DE2001141698 DE10141698A1 (en) 2001-08-25 2001-08-25 Vibration-damped component of a motor vehicle

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