EP3234400A1 - Disc brake for a utility vehicle - Google Patents

Disc brake for a utility vehicle

Info

Publication number
EP3234400A1
EP3234400A1 EP15810666.6A EP15810666A EP3234400A1 EP 3234400 A1 EP3234400 A1 EP 3234400A1 EP 15810666 A EP15810666 A EP 15810666A EP 3234400 A1 EP3234400 A1 EP 3234400A1
Authority
EP
European Patent Office
Prior art keywords
disc brake
brake
sliding bush
guide rail
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.)
Withdrawn
Application number
EP15810666.6A
Other languages
German (de)
French (fr)
Inventor
Alexander Asen
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge 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 Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of EP3234400A1 publication Critical patent/EP3234400A1/en
Withdrawn legal-status Critical Current

Links

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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/22655—Constructional details of guide pins
    • 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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
    • 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
    • F16D65/005—Components of axially engaging brakes not otherwise provided for
    • F16D65/0068—Brake calipers
    • F16D65/0075—Brake calipers assembled from a plurality of parts
    • 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
    • F16D65/005—Components of axially engaging brakes not otherwise provided for
    • F16D65/0087—Brake housing guide members, e.g. caliper pins; Accessories therefor, e.g. dust boots
    • 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
    • F16D2200/0034—Materials; Production methods therefor non-metallic
    • F16D2200/0056—Elastomers

Definitions

  • the invention relates to a disc brake for a commercial vehicle according to the preamble of claim 1.
  • a brake caliper also referred to as a sliding caliper, of a generic disc brake is secured by means of fastening elements on a vehicle-side, i. stationary brake carrier held.
  • guide rails are attached to the brake carrier in particular by screwing, on the other hand, are guided in plain bearings of the caliper so that this, relative to a rotationally held on an axle of the vehicle brake disc is axially displaceable during braking.
  • One of the bearings is designed as a fixed bearing with little sliding play and serves mainly the axial guidance of the caliper, the bearing clearance is kept as low as possible.
  • the other plain bearing however, has as a floating bearing due to a larger bearing clearance, since in addition to the axial guidance and tolerance compensation as well as thermally induced expansions are taken into account.
  • the provision of the guide bush and its installation can be realized only with considerable effort, resulting alone due to the relatively many components of the guide bush, consisting essentially of the mentioned metallic bearing sleeve, the associated slide bushing made of plastic and the stop ring, high production costs.
  • a relatively accurate machining of both the bearing sleeve and the brake caliper side bore is required.
  • the said shoulder of the bore against which the stop ring abuts is likewise to be produced only with a corresponding manufacturing outlay, that is to say the bore must be formed as a stepped bore.
  • the assembly of the guide bushing does not meet the requirements for a cost-optimized processing in terms of their cost.
  • the invention has for its object to further develop a disc brake of the generic type so that it is conceptually simplified and their production and assembly easier and thus cheaper.
  • the necessary for the Loslagerbetweenn tasks sliding bush is quasi part of the guide rail, resulting in a whole range of advantages.
  • These include, first of all, the simplified production of the movable bearing, since essentially only the guide rail and the slide-secured against sliding bushing must be made. This is preferably done by molding the guide rail with plastic to form the sliding bush, wherein according to a development of the invention, the guide rail has a circumferential groove whose width corresponds to the desired width of the sliding bushing. The laterally delimiting walls of the groove form a stop for a displacement protection, but at the same time serve as a safeguard against squeezing the slide bushing.
  • grease grooves are provided on the outside of the sliding bush, which preferably run obliquely in a conventional manner and serve to absorb grease, in order to enable a low-friction displacement of the caliper on the sliding bushing.
  • the grease grooves are bounded by at least one circumferential sealing lip, i. closed on the front side, by the one hand, a leakage of the grease is prevented and on the other hand, the grease grooves from penetration of
  • the assembly cost of the floating bearing is also significantly reduced overall, i. possible in a very short time. This is mainly due to the fact that the guide rail with integrated slide bushing merely has to be pushed into the brake caliper bore or the caliper must be pushed onto the guide rail already connected to the brake carrier.
  • the invention leads to a remarkable cost savings in the manufacture of the disc brake.
  • the functionality remains, as it is given in a disc brake according to the prior art, completely preserved.
  • the width of the bushing is arbitrary and only determined by the specification of a sufficient investment on the wall of the brake caliper side bore, which in turn is determined by a sufficient operability.
  • Figure 2 shows a part of the disc brake in an exploded view
  • FIG. 4 shows an enlarged detail corresponding to the marking "B" in FIG. 3
  • Figure 5 shows a part of the disc brake in different views.
  • FIG. 1 shows a disc brake for a commercial vehicle is shown, which has a brake caliper 2 in its basic structure, which summarizes a brake disc 3, which is secured against rotation on an axis, not shown, of the utility vehicle.
  • the caliper 2 is arranged on a stationary brake carrier 1 of the commercial vehicle, relative to the brake disc 3, axially displaceable.
  • a fastening element is designed as a fixed bearing 4 and the other as a floating bearing 5.
  • the floating bearing 5 For supporting the guide beam 6, i. for the axial guidance of the caliper 2, the floating bearing 5 has a sliding bushing 7 made of a plastic, preferably an elastomer, which is held displaceably on the guide rail 6 in accordance with the invention, as can be seen particularly clearly in FIG. This figure shows the guide rail 6 with the sliding bush 7 immediately before assembly.
  • a circumferential groove 12 is inserted in the shell of the guide rail 6, on the walls of which the sliding bush 7 supported.
  • the slide bush 7 has a plurality of fat grooves 10 on its outer side facing the wall of the bore 9, which run obliquely relative to a center axis of the sliding bush 7. These Fettnuten 10 are evenly distributed over the circumference.
  • the fat grooves 10 are closed at the end by circumferential sealing lips 8, of which several, juxtaposed on each side are formed. These sealing lips 8 are used both to prevent the escape of grease from the Fettnuten 10 as well as their seal to prevent the penetration of dirt.
  • the slide bush 7 is expediently produced by injecting the guide rail 6 in the region of the groove 12.

Abstract

A disc brake for a utility vehicle, having a brake calliper (2) which engages over a brake disc (3) and is held on a stationary brake carrier (1) such that it can be displaced axially in relation to the brake disc (3) by way of two fastening elements which are arranged in each case in a bore (9) of the brake calliper (2), are configured as plain bearings, and of which one is configured as a locating bearing (4) and the other is configured as a floating bearing (5), wherein the floating bearing (5) has a sliding bush (7) made from a plastic, in particular an elastomer, in which a guide rod (6) which is connected to the brake carrier (1) is mounted, is configured in such a way that the sliding bush (7) is held on the guide rod (6) such that it is secured against displacement and bears against the wall of the brake calliper-side bore (9), wherein the sliding bush (7) projects radially with respect to the guide rod (6).

Description

Scheibenbremse für ein Nutzfahrzeug  Disc brake for a commercial vehicle
Die Erfindung betrifft eine Scheibenbremse für ein Nutzfahrzeug nach dem Oberbegriff des Anspruchs 1 . The invention relates to a disc brake for a commercial vehicle according to the preamble of claim 1.
Ein auch als Schiebesattel bezeichneter Bremssattel einer gattungsgemäßen Scheibenbremse ist mittels Befestigungselementen an einem fahrzeugseitigen, d.h. ortsfesten Bremsträger gehalten. A brake caliper, also referred to as a sliding caliper, of a generic disc brake is secured by means of fastening elements on a vehicle-side, i. stationary brake carrier held.
Dazu sind Führungsholme am Bremsträger insbesondere durch Verschrauben befestigt, die andererseits in Gleitlagern des Bremssattels so geführt sind, dass dieser, bezogen auf eine an einer Achse des Fahrzeugs verdrehsicher gehaltenen Bremsscheibe bei einer Bremsung axial verschiebbar ist. For this purpose, guide rails are attached to the brake carrier in particular by screwing, on the other hand, are guided in plain bearings of the caliper so that this, relative to a rotationally held on an axle of the vehicle brake disc is axially displaceable during braking.
Eines der Gleitlager ist als Festlager mit geringem Gleitspiel ausgebildet und dient in der Hauptsache der axialen Führung des Bremssattels, wobei das Lagerspiel so gering wie möglich gehalten ist. Das andere Gleitlager hingegen weist als Loslager funktionsbedingt ein größeres Lagerspiel auf, da neben der axialen Führung auch ein Toleranzausgleich sowie thermisch bedingte Ausdehnungen zu berücksichtigen sind. One of the bearings is designed as a fixed bearing with little sliding play and serves mainly the axial guidance of the caliper, the bearing clearance is kept as low as possible. The other plain bearing, however, has as a floating bearing due to a larger bearing clearance, since in addition to the axial guidance and tolerance compensation as well as thermally induced expansions are taken into account.
Aufgrund des größeren Lagerspiels können im Fahrbetrieb Klappergeräusche entstehen, zu deren Verhinderung bzw. Dämpfung bei der bekannten Scheibenbremse eine aus Kunststoff, insbesondere einem Elastomer bestehende Gleitbuchse Verwendung findet, in der der Führungsholm axial verschieblich gelagert ist. Diese Gleitbuchse ist in einer Lagerhülse aus Metall, üblicherweise aus Stahlblech, verschiebegesichert gehalten, die in eine Bohrung des Bremssattels ein- gepresst und dadurch reibschlüssig darin gehalten ist, wobei die Gleitbuchse und die Lagerhülse Bestandteil einer Führungsbuchse sind. Zur Begrenzung des Einschubs beim Eindrücken der Führungsbuchse in die Bohrung des Bremssattels findet als weiteres Element der Führungsbuchse ein Anschlagring Verwendung, der an einer Schulter der Bohrung des Bremssattels anliegt. Darüber hinaus schützt der Anschlagring die Gleitbuchse vor Beschä- digungen durch Begrenzung des Dämpfungsweges, wobei hierdurch eine Beschädigung der sattelseitigen Bohrung durch Anschlagen der Führungsbuchse vermieden wird. Due to the larger bearing clearance rattling noises can occur when driving, for their prevention or damping in the known disc brake made of plastic, in particular an elastomer sliding bush is used, in which the guide rail is mounted axially displaceable. This slide bush is held displaceably secured in a bearing sleeve made of metal, usually made of sheet steel, which is pressed into a bore of the caliper and is thereby held in a frictional engagement therein, wherein the slide bush and the bearing sleeve are part of a guide bushing. To limit the insertion when pressing the guide bush into the bore of the caliper is used as a further element of the guide bush a stop ring use, which bears against a shoulder of the bore of the caliper. In addition, the stop ring protects the slide bush against damage by limiting the damping travel, thereby avoiding damage to the saddle-side bore by striking the guide bushing.
Allerdings ist die Bereitstellung der Führungsbuchse und deren Montage nur mit einem erheblichen Aufwand zu realisieren, wobei allein aufgrund der relativ vielen Bestandteile der Führungsbuchse, im Wesentlichen bestehend aus der erwähnten metallischen Lagerhülse, der damit verbundenen Gleitbuchse aus Kunststoff sowie dem Anschlagring, hohe Fertigungskosten entstehen. Um einen Presssitz für die Führungsbuchse zu erhalten und damit eine Verschiebesicherung im Bremssattel zu gewährleisten, ist eine relativ genaue Bearbeitung sowohl der Lagerhülse wie auch der bremssattelseitigen Bohrung erforderlich. Die erwähnte Schulter der Bohrung, an der der Anschlagring anliegt, ist gleichfalls nur mit einem entsprechenden Fertigungsaufwand herzustellen, d.h., die Bohrung muss als Stufenbohrung ausgebildet sein. However, the provision of the guide bush and its installation can be realized only with considerable effort, resulting alone due to the relatively many components of the guide bush, consisting essentially of the mentioned metallic bearing sleeve, the associated slide bushing made of plastic and the stop ring, high production costs. In order to obtain a press fit for the guide bush and thus to ensure a displacement protection in the caliper, a relatively accurate machining of both the bearing sleeve and the brake caliper side bore is required. The said shoulder of the bore against which the stop ring abuts is likewise to be produced only with a corresponding manufacturing outlay, that is to say the bore must be formed as a stepped bore.
Auch die Montage der Führungsbuchse entspricht hinsichtlich ihrer Kosten nicht den Vorgaben zu einer kostenoptimierten Bearbeitung. The assembly of the guide bushing does not meet the requirements for a cost-optimized processing in terms of their cost.
Der Erfindung liegt die Aufgabe zugrunde, eine Scheibenbremse der gattungsgemäßen Art so weiterzuentwickeln, dass sie konzeptionell vereinfacht und ihre Herstellung und Montage einfacher und damit kostengünstiger wird. The invention has for its object to further develop a disc brake of the generic type so that it is conceptually simplified and their production and assembly easier and thus cheaper.
Diese Aufgabe wird durch eine Scheibenbremse mit den Merkmalen des Anspruchs 1 gelöst. This object is achieved by a disc brake with the features of claim 1.
Durch die Erfindung kann auf die Bereitstellung einer Führungsbuchse gänzlich verzichtet werden. Stattdessen ist die für die loslagertypischen Aufgaben erforderliche Gleitbuchse quasi Bestandteil des Führungsholms, wodurch sich eine ganze Reihe von Vorteilen ergeben. Hierzu zählt zunächst einmal die vereinfachte Herstellung des Loslagers, da im Wesentlichen nur der Führungsholm sowie die daran verschiebegesichert gehaltene Gleitbuchse hergestellt werden müssen. Dies erfolgt bevorzugt durch Umspritzen des Führungsholms mit Kunststoff zur Ausbildung der Gleitbuchse, wobei nach einer Weiterbildung der Erfindung der Führungsholm eine umlaufende Nut aufweist, deren Breite der gewünschten Breite der Gleitbuchse entspricht. Die die Nut seitlich begrenzenden Wände bilden einen Anschlag für eine Verschiebesicherung, dienen jedoch gleichzeitig als Sicherung gegen ein Quetschen der Gleitbuchse. By the invention can be dispensed with the provision of a guide bushing entirely. Instead, the necessary for the Loslagertypischen tasks sliding bush is quasi part of the guide rail, resulting in a whole range of advantages. These include, first of all, the simplified production of the movable bearing, since essentially only the guide rail and the slide-secured against sliding bushing must be made. This is preferably done by molding the guide rail with plastic to form the sliding bush, wherein according to a development of the invention, the guide rail has a circumferential groove whose width corresponds to the desired width of the sliding bushing. The laterally delimiting walls of the groove form a stop for a displacement protection, but at the same time serve as a safeguard against squeezing the slide bushing.
Nach einem weiteren Gedanken sind an der Außenseite der Gleitbuchse Fettnuten vorgesehen, die bevorzugt in an sich bekannter Weise schräg verlaufen und der Aufnahme von Fett dienen, um eine reibungsarme Verschiebung des Bremssattels auf der Gleitbuchse zu ermöglichen. According to another idea, grease grooves are provided on the outside of the sliding bush, which preferably run obliquely in a conventional manner and serve to absorb grease, in order to enable a low-friction displacement of the caliper on the sliding bushing.
Endseitig werden die Fettnuten durch mindestens eine umfängliche Dichtlippe begrenzt, d.h. stirnseitig verschlossen, durch die einerseits ein Austritt des Fetts verhindert wird und andererseits die Fettnuten vor Eindringen von At the end, the grease grooves are bounded by at least one circumferential sealing lip, i. closed on the front side, by the one hand, a leakage of the grease is prevented and on the other hand, the grease grooves from penetration of
Schmutz geschützt werden. Dirt be protected.
Neben der ausgesprochen kostengünstigen Herstellung des Loslagers, zu der auch die wesentlich einfachere Bearbeitung der bremssattelseitigen Bohrung gehört, insbesondere, da keine engen Toleranzen mehr eingehalten werden müssen, ist gleichfalls der Montageaufwand des Loslagers insgesamt deutlich reduziert, d.h. in sehr kurzer Zeit möglich. Hierzu trägt vor allem beim, dass der Führungsholm mit integrierter Gleitbuchse lediglich in die bremssattelseitige Bohrung eingeschoben bzw. der Bremssattel auf den bereits mit dem Bremsträger verbundenen Führungsholm aufgeschoben werden muss. In addition to the extremely cost-effective production of floating bearing, which also includes the much simpler processing of the brake caliper side bore, in particular, since no narrow tolerances must be complied with, the assembly cost of the floating bearing is also significantly reduced overall, i. possible in a very short time. This is mainly due to the fact that the guide rail with integrated slide bushing merely has to be pushed into the brake caliper bore or the caliper must be pushed onto the guide rail already connected to the brake carrier.
Alles in allem führt die Erfindung zu einer bemerkenswerten Kostenersparnis bei der Herstellung der Scheibenbremse. Dabei bleibt die Funktionsfähigkeit, wie sie bei einer Scheibenbremse nach dem Stand der Technik gegeben ist, vollständig erhalten. All in all, the invention leads to a remarkable cost savings in the manufacture of the disc brake. In this case, the functionality remains, as it is given in a disc brake according to the prior art, completely preserved.
Durch den, gemäß der Erfindung radialen Überstand der Gleitbuchse gegenüber dem Führungsholm werden die dem Loslager zugeschriebenen Aufgaben auch bei dem neuen Loslager uneingeschränkt erfüllt. Hierzu zählt insbesondere die Vermeidung von Klappergeräuschen, da die Gleitbuchse auftretende Vib- rationen dämpft und verhindert, dass der Führungsholm an der Wand der bremssattelseitigen Bohrung anschlägt. By, according to the invention, radial projection of the bushing relative to the guide rail, the tasks attributed to the floating bearing are fully met even in the new floating bearing. This includes, in particular, the avoidance of rattling noises since the sliding bushing encounters vibrations. dampens and prevents the guide rail abuts against the wall of the brake caliper side bore.
Darüber hinaus werden durch die Gleitbuchse auch in der neuen Konstellation fertigungsbedingte Toleranzen aufgenommen, so dass der mit der Gleitbuchse bestückte Führungsholm die vollständige und uneingeschränkte Funktion eines Loslagers übernimmt. In addition, tolerances due to manufacturing are taken up by the slide bushing in the new constellation so that the guide rail equipped with the sliding bushing assumes the complete and unrestricted function of a floating bearing.
Die Breite der Gleitbuchse ist frei wählbar und lediglich bestimmt durch die Vorgabe einer ausreichenden Anlage an der Wandung der bremssattelseitigen Bohrung, die wiederum bestimmt wird von einer ausreichenden Funktionsfähigkeit. The width of the bushing is arbitrary and only determined by the specification of a sufficient investment on the wall of the brake caliper side bore, which in turn is determined by a sufficient operability.
Weitere vorteilhafte Ausbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet. Further advantageous embodiments of the invention are characterized in the subclaims.
Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der beigefügten Zeichnungen beschrieben. An embodiment of the invention will be described below with reference to the accompanying drawings.
Es zeigen: Show it:
Figur 1 eine Scheibenbremse in einer schematischen Draufsicht 1 shows a disc brake in a schematic plan view
Figur 2 einen Teil der Scheibenbremse in einer Explosionsdarstellung Figure 2 shows a part of the disc brake in an exploded view
Figur 3 einen Ausschnitt der Scheibenbremse in einer geschnittenen Seitenansicht 3 shows a section of the disc brake in a sectional side view
Figur 4 einen vergrößerten Ausschnitt, entsprechend der Kennzeichnung „B" in Figur 3 FIG. 4 shows an enlarged detail corresponding to the marking "B" in FIG. 3
Figur 5 einen Teil der Scheibenbremse in verschiedenen Ansichten. Figure 5 shows a part of the disc brake in different views.
In der Figur 1 ist eine Scheibenbremse für ein Nutzfahrzeug gezeigt, die in ihrem Grundaufbau einen Bremssattel 2 aufweist, der eine Bremsscheibe 3 um- fasst, die an einer nicht dargestellten Achse des Nutzfahrzeuges verdrehsicher befestigt ist. Der Bremssattel 2 ist an einem ortsfesten Bremsträger 1 des Nutzfahrzeuges, bezogen auf die Bremsscheibe 3, axial verschiebbar angeordnet. 1 shows a disc brake for a commercial vehicle is shown, which has a brake caliper 2 in its basic structure, which summarizes a brake disc 3, which is secured against rotation on an axis, not shown, of the utility vehicle. The caliper 2 is arranged on a stationary brake carrier 1 of the commercial vehicle, relative to the brake disc 3, axially displaceable.
Es sind zwei Befestigungselemente vorgesehen, die jeweils eine mit dem Bremsträger 1 verbundenen Führungsholm 6 aufweisen, der mittels einer nicht dargestellten Schraube am Bremsträger 1 befestigt ist. Dabei ist ein Befestigungselement als Festlager 4 und das andere als Loslager 5 ausgebildet. There are two fasteners are provided, each having a connected to the brake carrier 1 guide rail 6, which is fastened by means of a screw, not shown, on the brake carrier 1. In this case, a fastening element is designed as a fixed bearing 4 and the other as a floating bearing 5.
Zur Lagerung des Führungsholms 6, d.h. zur axialen Führung des Bremssattels 2, weist das Loslager 5 eine Gleitbuchse 7 aus einem Kunststoff, vorzugsweise einem Elastomer, auf, die erfindungsgemäß verschiebegesichert am Führungsholm 6 gehalten ist, wie dies besonders deutlich in der Figur 2 erkennbar ist. Diese Figur zeigt den Führungsholm 6 mit der Gleitbuchse 7 unmittelbar vor einer Montage. For supporting the guide beam 6, i. for the axial guidance of the caliper 2, the floating bearing 5 has a sliding bushing 7 made of a plastic, preferably an elastomer, which is held displaceably on the guide rail 6 in accordance with the invention, as can be seen particularly clearly in FIG. This figure shows the guide rail 6 with the sliding bush 7 immediately before assembly.
In den Figuren 3 und 4 ist ein Teilausschnitt des Bremssattels 2 mit montiertem Führungsholm 6 dargestellt. Darin ist zu erkennen, dass die Gleitbuchse 7 radial gegenüber dem Führungsholm 6 übersteht und an der Wand der brems- sattelseitigen Bohrung 9 anliegt. In the figures 3 and 4, a partial section of the caliper 2 is shown with mounted guide rail 6. It can be seen that the slide bushing 7 protrudes radially relative to the guide rail 6 and rests against the wall of the brake caliper-side bore 9.
Zur axialen Verschiebesicherung der Gleitbuchse 7 am Führungsholm 6, der im Übrigen eine Stufenbohrung 1 1 zur Aufnahme der besagten Schraube zur Verbindung mit dem Bremsträger 1 aufweist, ist in den Mantel des Führungsholms 6 eine umfängliche Nut 12 eingelassen, an deren Wänden sich die Gleitbuchse 7 abstützt. For axial displacement protection of the sliding bushing 7 on the guide rail 6, which has a stepped bore 1 1 for receiving the said screw for connection to the brake carrier 1, a circumferential groove 12 is inserted in the shell of the guide rail 6, on the walls of which the sliding bush 7 supported.
In den Figuren 5b) und c) sind einmal der Führungsholm 6 und zum anderen die Gleitbuchse 7 jeweils als Einzelheit abgebildet, während die Figur 5a) den Führungsholm 6 mit angebrachter Gleitbuchse 7 wiedergibt. In Figures 5b) and c) are once the guide rail 6 and the other the slide bushing 7 each shown as a detail, while the figure 5a) the guide rail 6 with attached sliding bushing 7 reproduces.
Darin und in der Figur 4 ist deutlich zu erkennen, dass die Gleitbuchse 7 auf ihrer der Wandung der Bohrung 9 zugewandten Außenseite eine Vielzahl von Fettnuten 10 aufweist, die, bezogen auf eine Mittelachse der Gleitbuchse 7 schräg verlaufen. Dabei sind diese Fettnuten 10 gleichmäßig über den Umfang verteilt. It can clearly be seen in FIG. 4 and in that FIG. 4 that the slide bush 7 has a plurality of fat grooves 10 on its outer side facing the wall of the bore 9, which run obliquely relative to a center axis of the sliding bush 7. These Fettnuten 10 are evenly distributed over the circumference.
Endseitig werden die Fettnuten 10 durch umlaufende Dichtlippen 8 verschlossen, von denen an jeder Seite mehrere, nebeneinander liegende angeformt sind. Diese Dichtlippen 8 dienen sowohl der Verhinderung eines Fettaustritts aus den Fettnuten 10 wie auch deren Abdichtung zur Vernneidung eines Eindringens von Schmutz. The fat grooves 10 are closed at the end by circumferential sealing lips 8, of which several, juxtaposed on each side are formed. These sealing lips 8 are used both to prevent the escape of grease from the Fettnuten 10 as well as their seal to prevent the penetration of dirt.
Wie bereits erwähnt, wird die Gleitbuchse 7 zweckmäßigerweise durch Um- spritzen des Führungsholms 6 im Bereich der Nut 12 hergestellt. As already mentioned, the slide bush 7 is expediently produced by injecting the guide rail 6 in the region of the groove 12.

Claims

Ansprüche claims
Scheibenbremse für ein Nutzfahrzeug, mit einem eine Bremsscheibe (3) übergreifenden Bremssattel (2), der durch zwei, jeweils in einer Bohrung (9) des Bremssattels (2) angeordnete und als Gleitlager ausgebildete Befestigungselemente, von denen eins als Fest- (4) und das andere als Loslager (5) ausgebildet ist, bezogen auf die Bremsscheibe (3), axial verschiebbar an einem ortsfesten Bremsträger (1 ) gehalten ist, wobei das Loslager (5) eine Gleitbuchse (7) aus einem Kunststoff, insbesondere einem Elastomer aufweist, in der ein mit dem Bremsträger (1 ) verbundener Führungsholm (6) gelagert ist, dadurch gekennzeichnet, dass die Gleitbuchse (7) verschiebegesichert am Führungsholm (6) gehalten ist und an der Wandung der bremssattelseitigen Bohrung (9) anliegt, wobei die Gleitbuchse (7) gegenüber dem Führungsholm (6) radial übersteht. Disc brake for a commercial vehicle, comprising a brake caliper (2) which overlaps a brake disc (3) and which is fastened by two fastening elements, each of which is arranged in a bore (9) of the caliper (2) and designed as a slide bearing, one of which being fixed (4). and the other is formed as a floating bearing (5), based on the brake disc (3), axially displaceable on a stationary brake carrier (1) is held, wherein the floating bearing (5) has a sliding bush (7) made of a plastic, in particular an elastomer in which a guide rail (6) connected to the brake carrier (1) is mounted, characterized in that the sliding bush (7) is held displaceably on the guide rail (6) and bears against the wall of the brake caliper side bore (9), the sliding bush (7) projects radially with respect to the guide rail (6).
Scheibenbremse nach Anspruch 1 , dadurch gekennzeichnet, dass derDisc brake according to claim 1, characterized in that the
Führungsholm (6) eine umfängliche Nut (12) aufweist, in der die Gleitbuchse (7) einliegt. Guide rail (6) has a circumferential groove (12) in which the sliding bush (7) rests.
Scheibenbremse nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Gleitbuchse (7) endseitig an den Wänden der Nut (12) anliegt. Disc brake according to claim 1 or 2, characterized in that the sliding bush (7) abuts the ends of the walls of the groove (12).
Scheibenbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zur Ausbildung der Gleitbuchse (7) der Führungsholm (6) mit dem Kunststoff umspritzt ist. Disc brake according to one of the preceding claims, characterized in that for forming the sliding bush (7) of the guide rail (6) is encapsulated with the plastic.
Scheibenbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gleitbuchse (7) auf ihrer der Bohrung (9) zugewandten Außenseite mit Fettnuten (10) versehen ist. Disc brake according to one of the preceding claims, characterized in that the slide bush (7) is provided with fat grooves (10) on its outer side facing the bore (9).
Scheibenbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Fettnuten (10), bezogen auf die Mittelachse der Gleitbuchse (7) schräg verlaufen. Disc brake according to one of the preceding claims, characterized in that the Fettnuten (10), relative to the central axis of the sliding bush (7) extend obliquely.
Scheibenbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Fettnuten (10) in gleichem Abstand zueinander angeordnet sind. Disc brake according to one of the preceding claims, characterized in that the Fettnuten (10) are arranged at the same distance from each other.
8. Scheibenbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Fettnuten (10) endseitig verschlossen sind. 8. Disc brake according to one of the preceding claims, characterized in that the Fettnuten (10) are closed at the end.
9. Scheibenbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in den beiden sich gegenüberliegenden Endbereichen der Gleitbuchse (7) jeweils mindestens eine umlaufende Dichtlippe angeformt ist, die an der Wandung der Bohrung (9) anliegt. 9. Disc brake according to one of the preceding claims, characterized in that in the two opposite end portions of the sliding bush (7) in each case at least one circumferential sealing lip is formed, which rests against the wall of the bore (9).
10. Scheibenbremse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mehrere nebeneinander liegende Dichtlippen (8) vorgesehen sind. 10. Disc brake according to one of the preceding claims, characterized in that a plurality of adjacent sealing lips (8) are provided.
EP15810666.6A 2014-12-19 2015-12-17 Disc brake for a utility vehicle Withdrawn EP3234400A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014019112.5A DE102014019112A1 (en) 2014-12-19 2014-12-19 Disc brake for a commercial vehicle
PCT/EP2015/080154 WO2016097098A1 (en) 2014-12-19 2015-12-17 Disc brake for a utility vehicle

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EP3234400A1 true EP3234400A1 (en) 2017-10-25

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EP15810666.6A Withdrawn EP3234400A1 (en) 2014-12-19 2015-12-17 Disc brake for a utility vehicle

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US (1) US20180003249A1 (en)
EP (1) EP3234400A1 (en)
CN (1) CN107110259B (en)
DE (1) DE102014019112A1 (en)
WO (1) WO2016097098A1 (en)

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CN112008332A (en) * 2019-05-28 2020-12-01 苏州多普工业技术有限公司 Guide pin and method for manufacturing the same
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DE102022123566A1 (en) 2022-09-15 2024-03-21 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Disc brake for a commercial vehicle

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Also Published As

Publication number Publication date
CN107110259A (en) 2017-08-29
CN107110259B (en) 2019-04-16
DE102014019112A1 (en) 2016-06-23
WO2016097098A1 (en) 2016-06-23
US20180003249A1 (en) 2018-01-04

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