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WO1997013665A1 - Assembly for axle - Google Patents

Assembly for axle Download PDF

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Publication number
WO1997013665A1
WO1997013665A1 PCT/EP1996/004465 EP9604465W WO9713665A1 WO 1997013665 A1 WO1997013665 A1 WO 1997013665A1 EP 9604465 W EP9604465 W EP 9604465W WO 9713665 A1 WO9713665 A1 WO 9713665A1
Authority
WO
WIPO (PCT)
Prior art keywords
axle assembly
brake
steering knuckle
assembly according
combination component
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/EP1996/004465
Other languages
German (de)
French (fr)
Inventor
Eckart Op Den Camp
Ulrich Seuser
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of WO1997013665A1 publication Critical patent/WO1997013665A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/18—Steering knuckles; King pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/065—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels employing disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/50—Constructional features of wheel supports or knuckles, e.g. steering knuckles, spindle attachments
    • 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
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0008—Brake supports
    • 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
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0008—Brake supports
    • F16D2055/0012—Brake supports integral with vehicle suspension
    • 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
    • F16D2055/0004—Parts or details of disc brakes
    • F16D2055/0037—Protective covers

Definitions

  • the invention relates to an axle assembly, in particular for the front axle of a front-driven motor vehicle, according to the preamble of claim 1.
  • axle assembly is known from DE-A-33 40 442.
  • the construction described there uses stamped and pressed sheet metal components to save weight. No further details regarding the material used can be found in this document.
  • the steering knuckle of the construction shown is matched to the combination component and does not allow either a disc brake or a drum brake to be used on the axle assembly without modifications.
  • the invention is based on the object of providing an axle assembly which is lighter than conventional constructions and which can be produced more cost-effectively and quickly and which nevertheless has sufficient stability.
  • axle assembly which has the features specified in claim 1.
  • the axle assembly construction according to the invention can be produced inexpensively by the mutually facing, continuously flat end faces, since such flat end faces enable a part to be machined to be clamped in well and thus to be easy to machine.
  • the separation of the combination component and steering knuckle along a continuous plane has the advantage that either a disc brake or a drum brake can be attached to the steering knuckle assembly without a substantial change in the steering knuckle.
  • the materials of the combination component and axle stub can be selected in accordance with the intended use, as a result of which the axle assembly according to the invention can be kept light yet inexpensive.
  • the steering knuckle will usually consist of aluminum or an aluminum alloy
  • the combination component can, for example, consist of more stable cast steel in order to better withstand the high surface pressures which are exerted on the brake support of the combination component by circumferential forces generated when braking, if one Disk brake is attached to the axle assembly.
  • the combination component can also consist of a lighter material, for example an aluminum alloy, if problems due to high surface pressures are not to be expected, for example if a drum brake is attached to the axle assembly, for further weight saving.
  • the combination component and the steering knuckle can consist of an aluminum alloy, they are different from one another
  • the material of the steering knuckle must be very tough, while, for example, a combination component used in conjunction with a drum brake must be very tight, ie it must have only a little and no large pores.
  • magnesium alloys can also be used.
  • the wheel bearing housing and the brake support of the combination component are preferably made in one piece with one another, but the brake support can also be a separate component connected to the combination component.
  • axle assembly according to the invention is designed in particular for use on the front axle of a motor vehicle, it can also be used on the rear axle of a motor vehicle without any problems, in particular in connection with the multi-link rear axles which are increasingly used today.
  • the steering knuckle consists of aluminum or sheet steel parts which preferably enclose a circumferential cavity in order to increase the stability of the steering knuckle.
  • this cavity can contain stiffening elements which are adapted to the shape of the cavity and which can be part of components which define the articulation points for fastening the wheel suspension or steering elements. These articulation points can be eyes, for example.
  • the steering knuckle is a cast aluminum part on which the articulation points for the wheel suspension or steering elements are formed in one piece.
  • the steering knuckle has a holder for a speed sensor. The axle assembly according to the invention can thus be used without any problems in vehicles which are equipped with an anti-lock braking system and / or a traction control system or similar systems which require wheel speed signals.
  • the brake support of the combination component is a first brake support arm of a brake support serving to fasten a disc brake to the axle assembly.
  • the first brake carrier arm is advantageously made in one piece with the wheel bearing housing and has an L-shaped cross-sectional shape.
  • the first brake carrier arm is the arm of the brake carrier which absorbs the circumferential forces which arise during braking during forward travel and which are introduced into it via the brake lining carrier plates.
  • the combination component therefore preferably consists of steel.
  • Embodiment is also a second brake carrier arm, which absorbs the circumferential forces generated during braking in reverse, part of the combination component.
  • the first brake carrier arm is designed so that it can absorb both the circumferential forces that occur during braking in forward travel and the circumferential forces that occur during braking in reverse travel.
  • conventional brake pads cannot be used in this embodiment.
  • brake linings are required whose lining carrier plate is designed in such a way that peripheral forces can be transmitted to the first brake carrier arm regardless of the direction of rotation.
  • the second brake associated with the brake carrier is low-arm part of the steering knuckle and has an in particular L-shaped cross-sectional shape corresponding to the first brake arm.
  • This embodiment makes it possible to form the second brake carrier arm from the material of the steering knuckle, which is preferably an aluminum alloy, in order to save weight. Since the circumferential forces that occur when braking in reverse are usually significantly lower, the surface pressures that occur can also withstand a brake carrier arm made of an aluminum alloy, unless a construction is chosen without the first, which describes the first brake carrier arm independently of the resulting circumferential forces of the direction of rotation of the braked wheel.
  • the brake support of the combination component is used for fastening a drum brake to the axle assembly and is formed in one piece with the wheel bearing housing as a support ring which bears an abutment which supports the circumferential forces arising during braking takes up, which are initiated via the brake shoes.
  • a combination component preferably consists of an aluminum alloy and can be a cast part or a forged part.
  • the abutment which absorbs the circumferential forces arising during braking and / or a brake cylinder is formed in one piece with the combination component or the support ring.
  • the combination component can be made of steel or of a suitable light metal alloy.
  • the combination component is preferably made of steel if it is to be connected to a disc brake and is made of one Light alloy made when a drum brake is to be attached to the axle assembly.
  • the steering knuckle is preferably made of a light alloy, but it can also be made of a steel alloy.
  • FIG. 1 shows an exploded cross-sectional view of a first exemplary embodiment of an axle assembly according to the invention, which is provided for receiving a disc brake
  • FIG. 2 shows a top view corresponding to the top view II-II from FIG. 1 of a second embodiment of an axle assembly according to the invention, somewhat modified compared to the first embodiment,
  • FIG 3 shows an exploded cross-sectional view of a third exemplary embodiment of an axle assembly according to the invention, in which the steering knuckle, not shown, is connected to a drum brake, and
  • FIG. 4 shows a spatial representation of a combination component shown in FIG. 3, which integrates a wheel bearing housing and a brake support.
  • FIG. 1 shows a first exemplary embodiment of an axle assembly, generally designated 10, which is provided for connection to a disc brake 12.
  • the axle assembly 10 includes a steering knuckle 14 which is cast in one piece from an aluminum alloy and has a ring-shaped one Base body 16, from which a support arm 18 projects axially and radially.
  • the support arm 18 forms the lower attachment point of a strut (not shown here) of a front wheel suspension, which can be attached to the support arm 18 by means of two screws.
  • Such struts which combine a shock absorber and a coil spring concentrically surrounding it, are also known under the term McPherson suspension and are widely used in today's cars.
  • Two eyes 20 and 22, which form articulation points 24 and 26, also project essentially axially away from the annular base body 16 of the steering knuckle 14.
  • the articulation point 24 formed by the eye 20 serves to fasten a tie rod belonging to the steering, while the articulation point 26 formed by the eye 22 serves to fasten a wishbone of the front wheel suspension.
  • a holder 28 extends from the annular base body 16 of the steering knuckle 14, in the through bore of which a speed sensor 30 can be inserted, which is fixed by means of a screw 32.
  • the support arm 18, the eyes 20 and 22 and the holder 28 are integrally connected to the annular base body 16.
  • the axle assembly 10 also includes a combination component 34, which has an axially extending, ring-shaped wheel bearing housing 36 and two integrally connected, in cross-sectional view, L-shaped brake support arms, of which only a first brake support arm 38 is shown in FIG and which together form a brake carrier used for fastening the disc brake 12.
  • the first brake carrier arm 38 absorbs the circumferential forces which are introduced when the brake carrier plates 39 of the disk brake 12 move forward into the first brake carrier arm 38 by the brake carrier plates 39 being supported on the short leg 38a in the circumferential direction.
  • the combination component 34 is made of spheroidal graphite cast iron and takes in the wheel bearing housing 36 a conventional, double-row spherical bearing 40 with a two-part inner ring 42 and a one-part outer ring 44.
  • the combination component 34 and the steering knuckle 14 each have an end face 46 or 48 which intersects the wheel axis A, is arranged perpendicular to it and is continuously flat. Both end faces 46 and 48 face each other and define the continuously flat separating surface between the combination component 34 and the steering knuckle 14, which constitutes the variability of the construction shown and enables either a disc brake or a drum brake with virtually no change in the steering knuckle to attach to it.
  • annular and substantially flat sheet metal part 50 is arranged, which as
  • Dirt shield is used and in particular to keep splash water away from a brake disk 52 of the disk brake 12.
  • a wheel hub 54 projects with its axially extending stub shaft 58 into the wheel bearing housing 36.
  • the outer circumferential surface of the stub shaft 58 supports the axle assembly 10 in the assembled state the two-part inner ring 42 of the ball bearing 40, while the outer ring 44 is held in the wheel bearing housing 36.
  • the wheel hub 54 has an axial passage recess, which is prepared with a multi-groove profile 60 for receiving a correspondingly configured end region of a drive shaft (not shown), which extends to the right in FIG. 1 through the steering knuckle 14.
  • the steering knuckle 14 and the combination component 34 are screwed together by means of four screws 62, each of which extends through a corresponding recess 64 in the steering knuckle 14 and into an internal thread 66 in the combination component 34.
  • the disc brake 12 is fastened to the brake carrier by means of two screws 68, the threaded end of which cuts 68a engage in a bore 70 provided on the combination component 34 and provided with an internal thread.
  • FIG. 2 shows a second embodiment of an axle assembly 10 that is somewhat modified compared to the first embodiment from FIG.
  • the first brake carrier arm 38 is made in one piece with the combination component 34 or its wheel bearing housing 36, while the second brake carrier arm 72 is made in one piece with the steering knuckle 14 made of cast aluminum.
  • the first brake carrier arm 38 in the second embodiment in cooperation with the lining carrier plates 39, is able to absorb both the circumferential forces that occur during braking in forward travel and also during braking in reverse travel.
  • the first brake carrier arm 38 has hook-shaped extensions 74 into which corresponding hooks 76 formed on each lining carrier plate 39 engage.
  • the second brake support arm 72 is therefore only used to properly guide the brake linings and has almost no supporting function.
  • FIG. 10 A third exemplary embodiment of an axle assembly 10 is shown in FIG.
  • a drum brake 80 is part of the axle assembly 10 in the third embodiment.
  • a brake cylinder 86 is also formed in one piece with the combination component 34 'and is supported by the support ring 84 like the abutment 82.
  • the combination component 34 ' also has the flat end face 46, which faces the likewise flat end face 48 of the steering knuckle 14, which is not shown in FIG.
  • the combination component 34 ' which is shown spatially in FIG. 4, is a part cast from an aluminum alloy or else an aluminum forged part.
  • the ball bearing 40 or even its outer ring 44 can already be cast in the casting mold in a cast version of the combination component 34 ', so that it or he does not have to be subsequently introduced into the wheel bearing housing 36.
  • the drum brake 80 includes an assembly 90 comprising the brake shoes 88 and a brake shoe adjusting device and a brake drum 92 which is plugged onto a wheel hub 54 'from the outside and is fastened to it by means of screws (not shown).
  • the drum brake 80 can additionally be provided with a parking brake device.
  • the wheel hub 54 ' represents an embodiment of the kind used for a non-driven wheel, but the wheel hub 54 can also be used just as well if the axle assembly 10 is provided for a driven wheel.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Braking Arrangements (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention concerns a motor vehicle assembly for axle (10) comprising a steering knuckle (14) which is made of a first material and comprises points of articulation (24, 26) for securing wheel-suspension or steering components. The assembly (10) further comprises a combination element (34) which is made of a second material, differing from the first material, and comprises a wheel bearing housing (36) and a brake mounting. The combination element (34) or the brake mounting thereof absorbs at least the peripheral forces occurring during braking in forward travel. The combination element (34) and the steering knuckle (14) each have a continuous plane end face (46 and 48, respectively) disposed perpendicular to a wheel axis (A). The end faces (46, 48) face each other and together define, between the combination element (34) and the steering knuckle (14), a continuous flat separating surface which intersects the wheel axis (A), preferably at a right-angle. The combination element (34) and the steering knuckle (14) can be interconnected along this separating surface. The assembly for axle (10) according to the invention can be produced economically and easily adapted to different requirements without substantial modifications to its design.

Description

Achsbaugruppe Axle assembly

Die Erfindung betrifft eine Achsbaugruppe, insbesondere für die Vorderachse eines frontangetriebenen Kraftfahrzeuges, nach dem Oberbegriff des Anspruchs 1.The invention relates to an axle assembly, in particular for the front axle of a front-driven motor vehicle, according to the preamble of claim 1.

Eine solche Achsbaugruppe ist aus der DE-A-33 40 442 bekannt. Die dort beschriebene Konstruktion verwendet zur Gewichtser¬ sparnis gestanzte und gepreßte Blechbauteile. Weitergehende Angaben hinsichtlich des verwendeten Materials lassen sich dieser Schrift nicht entnehmen. Der Achsschenkel der darge¬ stellten Konstruktion ist auf das Kombinationsbauteil abge- stimmt und erlaubt es nicht, ohne Modifikationen entweder eine Scheibenbremse oder eine Trommelbremse an der Achsbau¬ gruppe zu verwenden.Such an axle assembly is known from DE-A-33 40 442. The construction described there uses stamped and pressed sheet metal components to save weight. No further details regarding the material used can be found in this document. The steering knuckle of the construction shown is matched to the combination component and does not allow either a disc brake or a drum brake to be used on the axle assembly without modifications.

Im Automobilbau wird heutzutage versucht, das durch zusätzli- ehe Sicherheitsmerkmale und Komfortausstattungen beständig gestiegene Leergewicht der Fahrzeuge wieder zu vermindern, um den Kraftstoffverbrauch der Fahrzeuge herabzusetzen. Diese Bestrebungen betreffen nahezu alle Teile eines Kraftfahrzeu¬ ges und machen auch vor so sensiblen Teilen wie Fahrwerkskom- ponenten und Bremsen nicht halt. Zwar sind aus dem Sport- und Rennwagenbau beispielsweise Achsschenkel oder auch Fahrwerks¬ teile aus Aluminium bzw. Aluminiumlegierungen bekannt, die sehr leicht und dennoch stabil sind, jedoch handelt es sich dabei um sehr teuere und fertigungsintensive Konstruktionen, die für einen Großserieneinsatz schon aus Kostengründen, aber auch wegen der zeitaufwendigen Fertigung nicht geeignet sind.In today's automotive industry, attempts are being made to reduce the vehicle's unladen weight, which has steadily increased due to additional safety features and comfort equipment, in order to reduce the vehicle's fuel consumption. These efforts affect almost all parts of a motor vehicle and do not stop at such sensitive parts as chassis components and brakes. Although knuckles or chassis parts made of aluminum or aluminum alloys are known from sports and racing car construction, for example, which are very light and yet stable, these are very expensive and production-intensive constructions which are suitable for large-scale use for cost reasons, but are also unsuitable because of the time-consuming production.

Der Erfindung liegt die Aufgabe zugrunde, eine Achsbaugruppe bereitzustellen, die bei kostengünstiger und schneller Her- stellbarkeit leichter als herkömmliche Konstruktionen ist und die dennoch eine ausreichende Stabilität aufweist. Darüber¬ hinaus soll es möglich sein, entweder eine Scheibenbremse oder eine Trommelbremse an der Achsbaugruppe zu befestigen, ohne das die Achsbaugruppe insgesamt geändert werden muß.The invention is based on the object of providing an axle assembly which is lighter than conventional constructions and which can be produced more cost-effectively and quickly and which nevertheless has sufficient stability. In addition, it should be possible to use either a disc brake or to attach a drum brake to the axle assembly without having to change the axle assembly as a whole.

Diese Aufgabe ist erfindungsgemäß durch eine Achsbaugruppe gelöst, die die im Anspruch 1 angegebenen Merkmale aufweist.This object is achieved according to the invention by an axle assembly which has the features specified in claim 1.

Die erfindungsgemäße Achsbaugruppenkonstruktion ist durch die einander zugewandten, durchgehend planen Stirnflächen kosten¬ günstig herstellbar, da solche planen Stirnflächen ein gutes Einspannen eines zu bearbeitenden Teiles und damit eine gute Bearbeitbarkeit ermöglichen. Darüberhinaus hat die Trennung von Kombinationsbauteil und Achsschenkel entlang einer durch¬ gehend planen Ebene den Vorteil, daß ohne eine wesentliche Änderung des Achsschenkels entweder eine Scheibenbremse oder aber eine Trommelbremse an der Achsbaugruppe befestigt werden kann. Schließlich können bei der erfindungsgemäßen Achsbau¬ gruppe die Materialien von Kombinationsbauteil und Achsschen¬ kel dem vorgesehenen Einsatzzweck entsprechend gewählt werden, wodurch die erfindungsgemäße Achsbaugruppe leicht und dennoch kostengünstig gehalten werden kann. So wird aus Ge¬ wichtsgründen der Achsschenkel meist aus Aluminium bzw. einer Aluminiumlegierung bestehen, während das Kombinationsbauteil beispielsweise aus stabilerem Stahlguß bestehen kann, um den hohen Flächenpressungen besser standzuhalten, die auf die Bremsabstutzung des Kombinationsbauteiles durch beim Bremsen entstehende Umfangskräfte ausgeübt werden, wenn eine Schei¬ benbremse an der Achsbaugruppe befestigt ist. Andererseits kann das Kombinationsbauteil zur weiteren Gewichtsersparnis ebenfalls aus einem leichteren Material bestehen, beispiels- weise aus einer Aluminiumlegierung, wenn Probleme durch hohe Flächenpressungen nicht zu erwarten sind, etwa dann, wenn ei¬ ne Trommelbremse an der Achsbaugruppe befestigt ist. Obwohl also erfindungsgemäß das Kombinationsbauteil und der Achs¬ schenkel aus einer Aluminiumlegierung bestehen können, han- delt es sich dabei um voneinander verschiedeneThe axle assembly construction according to the invention can be produced inexpensively by the mutually facing, continuously flat end faces, since such flat end faces enable a part to be machined to be clamped in well and thus to be easy to machine. In addition, the separation of the combination component and steering knuckle along a continuous plane has the advantage that either a disc brake or a drum brake can be attached to the steering knuckle assembly without a substantial change in the steering knuckle. Finally, in the axle assembly according to the invention, the materials of the combination component and axle stub can be selected in accordance with the intended use, as a result of which the axle assembly according to the invention can be kept light yet inexpensive. For reasons of weight, the steering knuckle will usually consist of aluminum or an aluminum alloy, while the combination component can, for example, consist of more stable cast steel in order to better withstand the high surface pressures which are exerted on the brake support of the combination component by circumferential forces generated when braking, if one Disk brake is attached to the axle assembly. On the other hand, the combination component can also consist of a lighter material, for example an aluminum alloy, if problems due to high surface pressures are not to be expected, for example if a drum brake is attached to the axle assembly, for further weight saving. Thus, although according to the invention the combination component and the steering knuckle can consist of an aluminum alloy, they are different from one another

Aluminiumlegierungen und somit um voneinander verschiedene Materialien, denn die an einen Achsschenkel gestellten Anfor- derungen unterscheiden sich wesentlich von den Anforderungen, die an das Kombinationsbauteil gestellt werden. So muß das Material des Achsschenkels sehr zäh sein, während beispiels¬ weise ein in Verbindung mit einer Trommelbremse eingesetztes Kombinationsbauteil sehr dicht sein muß, d.h. es darf nur we¬ nig und keine großen Poren aufweisen. Statt der erwähnten, unterschiedlichen Aluminiumlegierungen können auch Magnesium¬ legierungen zum Einsatz kommen.Aluminum alloys and therefore different materials, because the requirements placed on a steering knuckle changes differ significantly from the requirements placed on the combination component. For example, the material of the steering knuckle must be very tough, while, for example, a combination component used in conjunction with a drum brake must be very tight, ie it must have only a little and no large pores. Instead of the different aluminum alloys mentioned, magnesium alloys can also be used.

Bevorzugt sind das Radlagergehäuse und die Bremsabstutzung des Kombinationsbauteiles einstückig miteinander ausgeführt, jedoch kann die Bremsabstutzung auch ein separates, mit dem Kombinationsbauteil verbundenes Bauteil sein.The wheel bearing housing and the brake support of the combination component are preferably made in one piece with one another, but the brake support can also be a separate component connected to the combination component.

Zwar ist die erfindungsgemäße Achsbaugruppe insbesondere für einen Einsatz an der Vorderachse eines Kraftfahrzeuges konzi¬ piert, sie läßt sich jedoch auch ohne weiteres an der Hinter¬ achse eines Kraftfahrzeuges einsetzen, insbesondere in Verbindung mit den heute zunehmend Verwendung findenden Mehr- lenkerhinterachsen.Although the axle assembly according to the invention is designed in particular for use on the front axle of a motor vehicle, it can also be used on the rear axle of a motor vehicle without any problems, in particular in connection with the multi-link rear axles which are increasingly used today.

Bei einer Ausführungsform einer erfindungsgemäßen Achsbau¬ gruppe besteht der Achsschenkel aus Aluminium- oder Stahl¬ blechformteilen, die bevorzugt einen umlaufenden Hohlraum umschließen, um die Stabilität des Achsschenkels zu erhöhen. Zur weiteren Stabilitätserhöhung kann dieser Hohlraum ver¬ steifende Elemente enthalten, die der Form des Hohlraumes an¬ gepaßt sind und die Bestandteil von Bauteilen sein können, die die Anlenkstellen zur Befestigung der Radaufhängungs- oder Lenkungselemente definieren. Diese Anlenkstellen können beispielsweise Augen sein.In one embodiment of an axle assembly according to the invention, the steering knuckle consists of aluminum or sheet steel parts which preferably enclose a circumferential cavity in order to increase the stability of the steering knuckle. To further increase stability, this cavity can contain stiffening elements which are adapted to the shape of the cavity and which can be part of components which define the articulation points for fastening the wheel suspension or steering elements. These articulation points can be eyes, for example.

Bei einer anderen Ausführungsform einer erfindungsgemäßen Achsbaugruppe ist der Achsschenkel ein Alugußteil, an dem die Anlenkstellen für die Radaufhängungs- oder Lenkungselemente einstuckig ausgebildet sind. Bei bevorzugten Ausführungsformen der erfindungsgemäßen Achs¬ baugruppe hat der Achsschenkel eine Halterung für einen Dreh¬ zahlmeßfühler. Damit kann die erfindungsgemäße Achsbaugruppe problemlos in Fahrzeugen eingesetzt werden, die mit einem An- tiblockiersystem und/oder einer Antriebsschlupfregelung oder ähnlichen Systemen ausgestattet sind, die Raddrehzahlsignale benötigen.In another embodiment of an axle assembly according to the invention, the steering knuckle is a cast aluminum part on which the articulation points for the wheel suspension or steering elements are formed in one piece. In preferred embodiments of the axle assembly according to the invention, the steering knuckle has a holder for a speed sensor. The axle assembly according to the invention can thus be used without any problems in vehicles which are equipped with an anti-lock braking system and / or a traction control system or similar systems which require wheel speed signals.

Bei einer bevorzugten Ausführungsform einer erfindungsgemaßen Achsbaugruppe ist die Bremsabstutzung des Kombinationsbautei¬ les ein erster Bremsträgerarm eines zur Befestigung einer Scheibenbremse an der Achsbaugruppe dienenden Bremsträgers. Der erste Bremsträgerarm ist vorteilhaft einstückig mit dem Radlagergehäuse ausgeführt und hat eine insbesondere L- förmige Querschnittsgestalt. Bei dem ersten Bremsträgerarm handelt es sich um denjenigen Arm des Bremsträgers, der die bei Bremsungen in Vorwärtsfahrt entstehenden Umfangskrafte aufnimmt, die über die Bremsbelagträgerplatten in ihn einge¬ leitet werden. Bevorzugt besteht daher das Kombinationsbau- teil in diesem Fall aus Stahl. Bei einer abgewandeltenIn a preferred embodiment of an axle assembly according to the invention, the brake support of the combination component is a first brake support arm of a brake support serving to fasten a disc brake to the axle assembly. The first brake carrier arm is advantageously made in one piece with the wheel bearing housing and has an L-shaped cross-sectional shape. The first brake carrier arm is the arm of the brake carrier which absorbs the circumferential forces which arise during braking during forward travel and which are introduced into it via the brake lining carrier plates. In this case, the combination component therefore preferably consists of steel. With a modified one

Ausführungsform ist auch ein zweiter Bremsträgerarm, der die bei Bremsungen in Rückwärtsfahrt entstehenden Umfangskrafte aufnimmt, Bestandteil des Kombinationsbauteiles.Embodiment is also a second brake carrier arm, which absorbs the circumferential forces generated during braking in reverse, part of the combination component.

Bei einer noch anderen Ausführungsform der erfindungsgemäßen Achsbaugruppe ist der erste Bremsträgerarm so gestaltet, daß er sowohl die bei Bremsungen in Vorwärtsfahrt als auch die bei Bremsungen in Rückwärtsfahrt auftretenden Umfangskräfte aufnehmen kann. Im Gegensatz zu den zwei zuvor beschriebenen Ausführungsformen können jedoch bei dieser Ausführungsform übliche Bremsbeläge nicht verwendet werden. Stattdessen sind Bremsbeläge erforderlich, deren Belagträgerplatte so ausge¬ bildet ist, daß Umfangskräfte drehrichtungsunabhängig auf den ersten Bremsträgerarm übertragen werden können.In yet another embodiment of the axle assembly according to the invention, the first brake carrier arm is designed so that it can absorb both the circumferential forces that occur during braking in forward travel and the circumferential forces that occur during braking in reverse travel. In contrast to the two previously described embodiments, however, conventional brake pads cannot be used in this embodiment. Instead, brake linings are required whose lining carrier plate is designed in such a way that peripheral forces can be transmitted to the first brake carrier arm regardless of the direction of rotation.

Bei einer weiteren Ausführungsform einer erfindungsgemäßen Achsbaugruppe ist der zweite dem Bremsträger zugehörige Brem- strägerarm Bestandteil des Achsschenkels und hat entsprechend dem ersten Bremsträgerarm eine insbesondere L-förmige Quer- schnittsgestalt. Diese Ausführungsform ermöglicht es, den zweiten Bremsträgerarm zur Gewichtsersparnis aus dem Material des Achsschenkels auszubilden, das bevorzugt eine Aluminium¬ legierung ist. Da die bei Bremsungen in Rückwärtsfahrt auf¬ tretenden Umfangskräfte zumeist deutlich geringer sind, kann den auftretenden Flächenpressungen auch ein Bremsträgerarm aus einer Aluminiumlegierung standhalten, sofern nicht ohne- hin eine Konstruktion gewählt wird, bei der der erste Brem¬ strägerarm wie beschrieben die entstehenden Umfangskrafte unabhängig von der Drehrichtung des gebremsten Rades auf¬ nimmt.In a further embodiment of an axle assembly according to the invention, the second brake associated with the brake carrier is low-arm part of the steering knuckle and has an in particular L-shaped cross-sectional shape corresponding to the first brake arm. This embodiment makes it possible to form the second brake carrier arm from the material of the steering knuckle, which is preferably an aluminum alloy, in order to save weight. Since the circumferential forces that occur when braking in reverse are usually significantly lower, the surface pressures that occur can also withstand a brake carrier arm made of an aluminum alloy, unless a construction is chosen without the first, which describes the first brake carrier arm independently of the resulting circumferential forces of the direction of rotation of the braked wheel.

Soll statt einer Scheibenbremse eine Trommelbremse an derShould a drum brake instead of a disc brake on the

Achsbaugruppe befestigt werden, dann ist bei bevorzugten Aus¬ führungsformen erfindungsgemäßer Achsbaugruppen die Bremsab¬ stutzung des Kombinationsbauteiles ein zur Befestigung einer Trommelbremse an der Achsbaugruppe dienender, einstückig mit dem Radlagergehäuse ausgebildeter Stützring, der ein Widerla¬ ger trägt, welches die beim Bremsen entstehenden Umfangskräf¬ te aufnimmt, die über die Bremsbacken eingeleitet werden. Ein derartiges Kombinationsbauteil besteht aus Gewichtsgründen vorzugsweise aus einer Aluminiumlegierung und kann ein Guß- teil oder ein Schmiedeteil sein.Axle assembly are attached, then, in preferred embodiments of axle assemblies according to the invention, the brake support of the combination component is used for fastening a drum brake to the axle assembly and is formed in one piece with the wheel bearing housing as a support ring which bears an abutment which supports the circumferential forces arising during braking takes up, which are initiated via the brake shoes. For reasons of weight, such a combination component preferably consists of an aluminum alloy and can be a cast part or a forged part.

Bei einer Abwandlung der zuletzt beschriebenen Ausführungs- form einer erfindungsgemäßen Achsbaugruppe ist das die beim Bremsen entstehenden Umfangskräfte aufnehmende Widerlager und/oder ein Bremszylinder einstückig mit dem Kombinations¬ bauteil bzw. dem Stützring ausgebildet.In a modification of the last-described embodiment of an axle assembly according to the invention, the abutment which absorbs the circumferential forces arising during braking and / or a brake cylinder is formed in one piece with the combination component or the support ring.

Das Kombinationsbauteil kann bei allen Ausführungsformen er¬ findungsgemäßer Achsbaugruppen aus Stahl oder auch aus einer geeigneten Leichtmetallegierung bestehen. Bevorzugt ist das Kombinationsbauteil jedoch aus Stahl gefertigt, wenn es mit einer Scheibenbremse verbunden werden soll, und ist aus einer Leichtmetallegierung gefertigt, wenn eine Trommelbremse an der Achsbaugruppe befestigt werden soll. Der Achsschenkel ist aus Gewichtsgründen bevorzugt aus einer Leichmetallegierung hergestellt, er kann jedoch auch aus einer Stahllegierung be¬ stehen.In all embodiments of the axle assemblies according to the invention, the combination component can be made of steel or of a suitable light metal alloy. However, the combination component is preferably made of steel if it is to be connected to a disc brake and is made of one Light alloy made when a drum brake is to be attached to the axle assembly. For weight reasons, the steering knuckle is preferably made of a light alloy, but it can also be made of a steel alloy.

Drei bevorzugte Ausführungsbeispiele einer erfindungsgemäßen Achsbaugruppe werden im folgenden anhand der beigefügten Fi¬ guren näher erläutert. Es zeigt:Three preferred exemplary embodiments of an axle assembly according to the invention are explained in more detail below with reference to the accompanying figures. It shows:

Fig.l eine auseinandergezogene Querschnittsansicht eines ersten Ausführungsbeispieles einer erfindungsgemä¬ ßen Achsbaugruppe, die zur Aufnahme einer Scheiben¬ bremse vorgesehen ist,1 shows an exploded cross-sectional view of a first exemplary embodiment of an axle assembly according to the invention, which is provided for receiving a disc brake,

Fig.2 eine der Draufsicht II-II aus Fig.l entsprechende Draufsicht auf ein gegenüber dem ersten Ausfüh¬ rungsbeispiel etwas abgewandeltes zweites Ausfüh¬ rungsbeispiel einer erfindungsgemäßen Achsbaugruppe,2 shows a top view corresponding to the top view II-II from FIG. 1 of a second embodiment of an axle assembly according to the invention, somewhat modified compared to the first embodiment,

Fig.3 eine auseinandergezogene Querschnittsansicht eines dritten Ausführungsbeispieles einer erfindungsgemä¬ ßen Achsbaugruppe, bei der der nicht dargestellte Achsschenkel mit einer Trommelbremse verbunden ist, und3 shows an exploded cross-sectional view of a third exemplary embodiment of an axle assembly according to the invention, in which the steering knuckle, not shown, is connected to a drum brake, and

Fig.4 eine räumliche Darstellung eines in Fig.3 wiederge¬ gebenen Kombinationsbauteiles, das ein Radlagerge- häuse und eine Bremsabstutzung integriert.4 shows a spatial representation of a combination component shown in FIG. 3, which integrates a wheel bearing housing and a brake support.

In Fig.l ist ein allgemein mit 10 bezeichnetes erstes Ausfüh¬ rungsbeispiel einer Achsbaugruppe dargestellt, die zur Ver¬ bindung mit einer Scheibenbremse 12 vorgesehen ist.1 shows a first exemplary embodiment of an axle assembly, generally designated 10, which is provided for connection to a disc brake 12.

Zur Achsbaugruppe 10 gehört ein aus einer Aluminiumlegierung einstückig gegossener Achsschenkel 14 mit einem ringförmigen Grundkörper 16, von dem ein Tragarm 18 axial und radial wegragt. Der Tragarm 18 bildet den unteren Befestigungspunkt eines hier nicht dargestellten Federbeines einer Vorder¬ radaufhängung, das mittels zweier Schrauben an dem Tragarm 18 befestigbar ist. Solche Federbeine, die einen Stoßdämpfer und eine diesen konzentrisch umgebende Schraubenfeder als Einheit zusammenfassen, sind auch unter dem Begriff McPherson- Aufhängung bekannt und finden in heutigen PKWs vielfach An¬ wendung. Von dem ringförmigen Grundkörper 16 des Achsschen- kels 14 ragen darüberhinaus zwei Augen 20 und 22 im wesentlichen axial weg, die Anlenkstellen 24 und 26 bilden. Die durch das Auge 20 gebildete Anlenkstelle 24 dient dabei zur Befestigung einer der Lenkung zugehörigen Spurstange, während die durch das Auge 22 gebildete Anlenkstelle 26 zur Befestigung eines Querlenkerε der Vorderradaufhängung dient. Schließlich erstreckt sich von dem ringförmigen Grundkörper 16 des Achsschenkels 14 eine Halterung 28, in deren Durch¬ gangsbohrung ein Drehzahlmeßfühler 30 einsetzbar ist, der mittels einer Schraube 32 fixiert wird. Der Tragarm 18, die Augen 20 und 22 sowie die Halterung 28 sind einstuckig mit dem ringförmigen Grundkörper 16 verbunden.The axle assembly 10 includes a steering knuckle 14 which is cast in one piece from an aluminum alloy and has a ring-shaped one Base body 16, from which a support arm 18 projects axially and radially. The support arm 18 forms the lower attachment point of a strut (not shown here) of a front wheel suspension, which can be attached to the support arm 18 by means of two screws. Such struts, which combine a shock absorber and a coil spring concentrically surrounding it, are also known under the term McPherson suspension and are widely used in today's cars. Two eyes 20 and 22, which form articulation points 24 and 26, also project essentially axially away from the annular base body 16 of the steering knuckle 14. The articulation point 24 formed by the eye 20 serves to fasten a tie rod belonging to the steering, while the articulation point 26 formed by the eye 22 serves to fasten a wishbone of the front wheel suspension. Finally, a holder 28 extends from the annular base body 16 of the steering knuckle 14, in the through bore of which a speed sensor 30 can be inserted, which is fixed by means of a screw 32. The support arm 18, the eyes 20 and 22 and the holder 28 are integrally connected to the annular base body 16.

Zur Achsbaugruppe 10 gehört weiterhin ein Kombinationsbauteil 34, das ein εich axial erstreckendes, ringförmiges Radlager- gehäuse 36 und zwei damit einstückig verbundene, in der Quer¬ schnittsansicht L-förmige Bremsträgerarme aufweist, von denen in Fig.l nur ein erster Bremsträgerarm 38 dargestellt ist und die zusammen einen zur Befestigung der Scheibenbremse 12 die¬ nenden Bremsträger bilden. Mit seinem kurzen Schenkel 38a nimmt der erste Bremsträgerarm 38 die Umfangskräfte auf, die bei Bremsungen in Vorwärtsfahrt von Belagträgerplatten 39 der Scheibenbremse 12 in den ersten Bremsträgerarm 38 eingeleitet werden, indem sich die Belagträgerplatten 39 in Umfangsrich¬ tung an dem kurzen Schenkel 38a abstützen. Das Kombinations- bauteil 34 ist aus Kugelgraphitguß hergestellt und nimmt in dem Radlagergehäuse 36 ein herkömmliches, zweireihiges Kugel- lager 40 mit einem zweiteiligen Innenring 42 und einem ein¬ teiligen Außenring 44 auf.The axle assembly 10 also includes a combination component 34, which has an axially extending, ring-shaped wheel bearing housing 36 and two integrally connected, in cross-sectional view, L-shaped brake support arms, of which only a first brake support arm 38 is shown in FIG and which together form a brake carrier used for fastening the disc brake 12. With its short leg 38a, the first brake carrier arm 38 absorbs the circumferential forces which are introduced when the brake carrier plates 39 of the disk brake 12 move forward into the first brake carrier arm 38 by the brake carrier plates 39 being supported on the short leg 38a in the circumferential direction. The combination component 34 is made of spheroidal graphite cast iron and takes in the wheel bearing housing 36 a conventional, double-row spherical bearing 40 with a two-part inner ring 42 and a one-part outer ring 44.

Das Kombinationsbauteil 34 und der Achsschenkel 14 weisen je eine die Radachse A schneidende, senkrecht zu ihr angeordnete und durchgehend ebene Stirnfläche 46 bzw. 48 auf. Beide Stirnflächen 46 bzw. 48 sind einander zugewandt und definie¬ ren die durchgehend ebene Trennfläche zwischen dem Kombinati¬ onsbauteil 34 und dem Achsschenkel 14, die die Variabilität der gezeigten Konstruktion ausmacht und es ermöglicht, nahezu ohne Änderung des Achsschenkels entweder eine Scheibenbremse oder eine Trommelbremse daran zu befestigen. Zwischen den ebenen Stirnflächen 46 bzw. 48 des Kombinationsbauteiles 34 bzw. des Achsschenkels 14 ist ein kreisringförmiges und im wesentlichen ebenes Blechformteil 50 angeordnet, das alsThe combination component 34 and the steering knuckle 14 each have an end face 46 or 48 which intersects the wheel axis A, is arranged perpendicular to it and is continuously flat. Both end faces 46 and 48 face each other and define the continuously flat separating surface between the combination component 34 and the steering knuckle 14, which constitutes the variability of the construction shown and enables either a disc brake or a drum brake with virtually no change in the steering knuckle to attach to it. Between the flat end faces 46 and 48 of the combination component 34 and the steering knuckle 14 is an annular and substantially flat sheet metal part 50 is arranged, which as

Schmutzschild dient und insbesondere Spritzwasser von einer Bremsscheibe 52 der Scheibenbremse 12 fernhalten soll.Dirt shield is used and in particular to keep splash water away from a brake disk 52 of the disk brake 12.

Eine Radnabe 54, an deren Flansch 56 die Bremsscheibe 52 mit- tels mehrerer nicht dargestellter Schrauben befestigt ist, ragt mit ihrem sich axial erstreckenden Wellenstumpf 58 in das Radlagergehäuse 36. Die Außenumfangsflache des Wellen¬ stumpfes 58 trägt im zusammengebauten Zustand der Achsbau¬ gruppe 10 den zweiteiligen Innenring 42 des Kugellagers 40, während der Außenring 44 im Radlagergehäuse 36 gehalten ist. Die Radnabe 54 hat eine axiale Durchgangsausnehmung, die mit einem Vielnutprofil 60 zur Aufnahme eines entsprechend ausge¬ stalteten Endbereiches einer nicht dargestellten Antriebswel¬ le vorbereitet ist, die sich in Fig.l nach rechts durch den Achsschenkel 14 erstreckt.A wheel hub 54, on the flange 56 of which the brake disc 52 is fastened by means of several screws (not shown), projects with its axially extending stub shaft 58 into the wheel bearing housing 36. The outer circumferential surface of the stub shaft 58 supports the axle assembly 10 in the assembled state the two-part inner ring 42 of the ball bearing 40, while the outer ring 44 is held in the wheel bearing housing 36. The wheel hub 54 has an axial passage recess, which is prepared with a multi-groove profile 60 for receiving a correspondingly configured end region of a drive shaft (not shown), which extends to the right in FIG. 1 through the steering knuckle 14.

Der Achsschenkel 14 und das Kombinationsbauteil 34 sind mit¬ tels vier Schrauben 62 miteinander verschraubt, von denen sich jede durch eine entsprechende Ausnehmung 64 im Achs- Schenkel 14 und in ein Innengewinde 66 im Kombinationsbauteil 34 erstreckt. Die Scheibenbremse 12 ist mittels zweier Schrauben 68 am Bremsträger befestigt, deren Gewindeendab- schnitte 68a in je eine am Kombinationsbauteil 34 vorhandene und mit einem Innengewinde versehene Bohrung 70 eingreifen.The steering knuckle 14 and the combination component 34 are screwed together by means of four screws 62, each of which extends through a corresponding recess 64 in the steering knuckle 14 and into an internal thread 66 in the combination component 34. The disc brake 12 is fastened to the brake carrier by means of two screws 68, the threaded end of which cuts 68a engage in a bore 70 provided on the combination component 34 and provided with an internal thread.

In Fig.2 ist ein gegenüber dem ersten Ausführungsbeispiel aus Fig.l etwas abgewandeltes, zweites Ausführungsbeispiel einer Achsbaugruppe 10 dargestellt. Im Unterschied zum ersten Aus¬ führungsbeispiel ist beim zweiten Ausführungsbeispiel nur der erste Bremsträgerarm 38 einstückig mit dem Kombinationsbau¬ teil 34 bzw. dessen Radlagergehäuse 36 ausgebildet, während der zweite Bremsträgerarm 72 einstückig mit dem aus Aluguß bestehenden Achsschenkel 14 ausgeführt ist. Darüberhinaus ist der erste Bremsträgerarm 38 bei dem zweiten Ausführungsbei¬ spiel im Zusammenwirken mit den Belagträgerplatten 39 dazu in der Lage, sowohl die bei Bremsungen in Vorwärtsfahrt als auch die bei Bremsungen in Rückwärtsfahrt auftretenden Umfangs- kräfte aufzunehmen. Hierzu hat der erste Bremsträgerarm 38 hakenförmige Fortsätze 74, in die entsprechende, an jeder Be¬ lagträgerplatte 39 ausgebildete Haken 76 eingreifen. Federn 78 zwischen den Belagträgerplatten 39 und dem ersten Belag- trägerarm 38 bzw. dem zweiten Belagträgerarm 72 verhindern durch die Bremsbeläge hervorgerufene Klappergeräusche. Bei dem zweiten Ausführungsbeispiel dient der zweite Bremsträ¬ gerarm 72 demnach nur noch zur einwandfreien Führung der Bremsbeläge und hat nahezu keine abstützende Funktion mehr.FIG. 2 shows a second embodiment of an axle assembly 10 that is somewhat modified compared to the first embodiment from FIG. In contrast to the first exemplary embodiment, in the second exemplary embodiment only the first brake carrier arm 38 is made in one piece with the combination component 34 or its wheel bearing housing 36, while the second brake carrier arm 72 is made in one piece with the steering knuckle 14 made of cast aluminum. In addition, the first brake carrier arm 38 in the second embodiment, in cooperation with the lining carrier plates 39, is able to absorb both the circumferential forces that occur during braking in forward travel and also during braking in reverse travel. For this purpose, the first brake carrier arm 38 has hook-shaped extensions 74 into which corresponding hooks 76 formed on each lining carrier plate 39 engage. Springs 78 between the lining carrier plates 39 and the first lining carrier arm 38 or the second lining carrier arm 72 prevent rattling noises caused by the brake linings. In the second exemplary embodiment, the second brake support arm 72 is therefore only used to properly guide the brake linings and has almost no supporting function.

Ein drittes Ausführungsbeispiel einer Achsbaugruppe 10 ist in Fig.3 dargestellt. Im Unterschied zu den ersten beiden Aus¬ führungsbeispielen ist beim dritten Ausführungsbeispiel eine Trommelbremse 80 Bestandteil der Achsbaugruppe 10. Dies er- fordert ein etwas abgewandeltes und daher mit 34 ' bezeichne¬ tes Kombinationsbauteil, welches neben dem Radlagergehäuse 36 ein als Bremsabstutzung dienendes Widerlager 82 aufweist, das von einem Stützring 84 getragen und einstückig mit diesem ausgebildet ist, der einstückig mit dem Radlagergehäuse 36 verbunden ist und dieses umgibt. Bei dem in Fig.3 dargestell¬ ten Ausführungsbeispiel ist darüberhinaus ein Bremszylinder 86 einstückig mit dem Kombinationsbauteil 34' ausgebildet und wird wie das Widerlager 82 von dem Stützring 84 getragen. Auch das Kombinationsbauteil 34 ' weist die ebene Stirnfläche 46 auf, die der ebenfalls ebenen Stirnfläche 48 des in Fig.3 nicht dargestellten Achsschenkels 14 zugewandt ist.A third exemplary embodiment of an axle assembly 10 is shown in FIG. In contrast to the first two exemplary embodiments, a drum brake 80 is part of the axle assembly 10 in the third embodiment. This requires a somewhat modified and therefore designated 34 'combination component which, in addition to the wheel bearing housing 36, has an abutment 82 which serves as a brake support , which is carried by a support ring 84 and is formed integrally therewith, which is connected in one piece to the wheel bearing housing 36 and surrounds it. In the exemplary embodiment shown in FIG. 3, a brake cylinder 86 is also formed in one piece with the combination component 34 'and is supported by the support ring 84 like the abutment 82. The combination component 34 'also has the flat end face 46, which faces the likewise flat end face 48 of the steering knuckle 14, which is not shown in FIG.

Bei dem Kombinationsbauteil 34', das in Fig.4 räumlich darge¬ stellt ist, handelt es sich im Gegenεatz zu dem Kombinations¬ bauteil 34 der ersten beiden Ausführungsbeispiele um ein aus einer Aluminiumlegierung gegossenes Teil oder auch um ein Aluminiumschmiedeteil. Das Kugellager 40 oder auch nur dessen Außenring 44 kann bei einer gegossenen Ausführung des Kombi¬ nationsbauteiles 34' bereits in der Gießform mit umgössen werden, so daß es bzw. er nicht nachträglich in das Radlager¬ gehäuse 36 eingebracht werden muß.In contrast to the combination component 34 of the first two exemplary embodiments, the combination component 34 ', which is shown spatially in FIG. 4, is a part cast from an aluminum alloy or else an aluminum forged part. The ball bearing 40 or even its outer ring 44 can already be cast in the casting mold in a cast version of the combination component 34 ', so that it or he does not have to be subsequently introduced into the wheel bearing housing 36.

Zur Trommelbremse 80 gehört eine die Bremsbacken 88 und eine Bremsbackennachstellvorrichtung umfassende Baugruppe 90 sowie eine Bremstrommel 92, die von außen auf eine Radnabe 54' ge¬ steckt und mittels nicht dargestellter Schrauben an dieser befestigt wird. Die Trommelbremse 80 kann zusätzlich mit ei¬ ner Feststellbremseinrichtung versehen sein. Die Radnabe 54' stellt eine Ausführung dar, wie sie für ein nicht angetriebe¬ nes Rad zum Einsatz kommt, ebensogut kann jedoch auch die Radnabe 54 verwendet werden, falls die Achsbaugruppe 10 für ein angetriebenes Rad vorgesehen ist. The drum brake 80 includes an assembly 90 comprising the brake shoes 88 and a brake shoe adjusting device and a brake drum 92 which is plugged onto a wheel hub 54 'from the outside and is fastened to it by means of screws (not shown). The drum brake 80 can additionally be provided with a parking brake device. The wheel hub 54 'represents an embodiment of the kind used for a non-driven wheel, but the wheel hub 54 can also be used just as well if the axle assembly 10 is provided for a driven wheel.

Claims

Patentansprüche claims 1. Achsbaugruppe (10) , insbesondere für die Vorderachse ei- nes frontangetriebenen Kraftfahrzeuges, mit1. axle assembly (10), in particular for the front axle of a front-driven motor vehicle, with - einem Achsschenkel (14) , der Anlenkstellen (24, 26) zur Be¬ festigung von Radaufhängungs- oder Lenkungselementen auf¬ weist, und- A steering knuckle (14) which has articulation points (24, 26) for fastening wheel suspension or steering elements, and - einem längs einer Trennfläche mit dem Achsschenkel (14) verbindbaren Kombinationsteil (34, 34'), welches ein Radla¬ gergehäuse (36) und eine Bremsabstutzung umfaßt und zumindest die bei Bremsungen in Vorwärtsfahrt entstehenden Umfangskräf- te aufnimmt, dadurch gekennzeichnet, daß - der Achsschenkel (14) aus einem ersten Material und das- A combination part (34, 34 ') which can be connected to the steering knuckle (14) along a separating surface and which comprises a wheel bearing housing (36) and a brake support and at least absorbs the circumferential forces which arise during braking during forward travel, characterized in that - the steering knuckle (14) made of a first material and that Kombinationsbauteil (34, 34') aus einem zweiten Material be¬ steht, das verschieden von dem ersten Material ist, undCombination component (34, 34 ') consists of a second material which is different from the first material, and - die Trennfläche zwischen dem Achsschenkel (14) und dem Kom¬ binationsbauteil (34, 34') eine die Radachse (A) vorzugsweise rechtwinklig schneidende, durchgehend ebene Fläche ist, die durch einander zugewandte, plane Stirnflächen (46, 48) des Kombinationsbauteiles (34, 34') und des Achsschenkels (14) definiert ist.- The separating surface between the steering knuckle (14) and the combination component (34, 34 ') is a continuously flat surface that preferably cuts the wheel axis (A) at right angles, and that has flat end faces (46, 48) of the combination component (facing each other) 34, 34 ') and the steering knuckle (14) is defined. 2. Achsbaugruppe nach Anspruch 1, dadurch gekennzeichnet, daß der Achsschenkel (14) aus Alumi¬ nium- oder Stahlblechformteilen besteht, die insbesondere ei¬ nen umlaufenden Hohlraum umschließen.2. axle assembly according to claim 1, characterized in that the steering knuckle (14) consists of Alumi¬ nium- or sheet steel molded parts, which in particular enclose a circumferential cavity. 3. Achsbaugruppe nach Anspruch 1, dadurch gekennzeichnet, daß der Achsschenkel (14) ein Alugu߬ teil ist, an dem die Anlenkstellen (24, 26) einstückig ausge¬ bildet sind.3. axle assembly according to claim 1, characterized in that the steering knuckle (14) is an Alugu߬ part on which the articulation points (24, 26) are integrally formed. 4. Achsbaugruppe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Achsschenkel (14) eine Halte¬ rung (28) für einen Drehzahlmeßfühler (30) aufweist. 4. axle assembly according to one of claims 1 to 3, characterized in that the steering knuckle (14) has a Halt¬ tion (28) for a speed sensor (30). 5. Achsbaugruppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bremsabstutzung des Kombina¬ tionsbauteils (34) ein erster Bremsträgerarm (38) eines zur Befestigung einer Scheibenbremse (12) an der Achsbaugruppe dienenden Bremsträgers ist, wobei der erste Bremsträgerarm (38) vorzugsweise einstückig mit dem Radlagergehäuse (36) ausgeführt ist und eine insbesondere L-förmige Querschnitts¬ gestalt aufweist.5. Axle assembly according to one of the preceding claims, characterized in that the brake support of the Kombina¬ tion component (34) is a first brake support arm (38) of a for mounting a disc brake (12) on the axle assembly serving as a brake support, the first brake support arm (38) is preferably made in one piece with the wheel bearing housing (36) and has an in particular L-shaped cross-sectional shape. 6. Achsbaugruppe nach Anspruch 5, dadurch gekennzeichnet, daß der erste Bremsträgerarm (38) so¬ wohl die bei Bremsungen in Vorwärtsfahrt als auch die bei Bremsungen in Rückwärtsfahrt auftretenden Umfangskräfte auf- nimmt.6. Axle assembly according to claim 5, characterized in that the first brake carrier arm (38) so¬ probably takes the braking forces in forward driving as well as the braking forces occurring in reverse driving peripheral forces. 7. Achsbaugruppe nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß ein zweiter dem Bremsträger zuge¬ höriger Bremsträgerarm (72) von insbesondere L-förmiger Quer- schnittsgestalt Bestandteil des Achsschenkels (14) ist.7. axle assembly according to claim 5 or 6, characterized in that a second brake carrier arm associated with the brake carrier (72) of in particular L-shaped cross-sectional shape is part of the steering knuckle (14). 8. Achsbaugruppe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Bremsabstutzung des Kombina¬ tionsbauteiles (34') ein zur Befestigung einer Trommelbremse (80) an der Achsbaugruppe dienender, einstückig mit dem Rad¬ lagergehäuse (36) ausgebildeter Stützring (84) ist, der ein Widerlager (82) trägt.8. Axle assembly according to one of claims 1 to 4, characterized in that the brake support of the Kombina¬ tion component (34 ') for fastening a drum brake (80) on the axle assembly serving, integrally formed with the Rad¬ bearing housing (36) support ring ( 84), which carries an abutment (82). 9. Achsbaugruppe nach Anspruch 8, dadurch gekennzeichnet, daß das Widerlager (82) einstückig mit dem Stützring (84) ist.9. Axle assembly according to claim 8, characterized in that the abutment (82) is in one piece with the support ring (84). 10. Achsbaugruppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Kombinationsbauteil (34, 34') aus Stahl oder aus einer Aluminiumlegierung besteht. 10. Axle assembly according to one of the preceding claims, characterized in that the combination component (34, 34 ') consists of steel or an aluminum alloy.
PCT/EP1996/004465 1995-10-13 1996-10-14 Assembly for axle Ceased WO1997013665A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19538212.9 1995-10-13
DE1995138212 DE19538212A1 (en) 1995-10-13 1995-10-13 Axle assembly

Publications (1)

Publication Number Publication Date
WO1997013665A1 true WO1997013665A1 (en) 1997-04-17

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Application Number Title Priority Date Filing Date
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