DE102008053886A1 - Air spring-longitudinal control arm arrangement for vehicle axle, has air spring which has rolling bellows with unrolling fold and unwinding piston supported by rolling bellows - Google Patents

Abstract

The The invention relates to an air spring trailing arm arrangement 1 for a vehicle axle 2. The arrangement comprises a Air spring 16, a rolling bellows 17 with a Abrollfalte 18 and comprising a rolling piston 17 carried by the rolling piston 21, the while unrolling the Abrollfalte 18 in a lifting movement a limited stroke H in the rolling bellows 17 in and out of it is movable, wherein the rolling piston 21 at its free, from the Rolling bellows 17 facing end face 22 a plug body 23 carries. Furthermore, the arrangement comprises a pivotable mounted trailing arm 3, on which the rolling piston 21 of the Air spring 16 is supported in normal driving. at such air spring trailing arm arrangement leaves with a simple production and minimal space requirement one ensure optimal function by ensuring that the trailing arm 3 is cast from a cast metal material and a handlebar arm 7, a bearing 8 for pivotally supporting the trailing arm 3 on the frame 10 of the vehicle, an axle 5 for a Axis 2 of the vehicle and a support arm 11, in which a corresponding to the plug body 23 of the rolling piston 21st molded recess 14 is formed, in which the plug body 23 sits in the normal driving position of the trailing arm 3, that the recess 14, the plug body 23 in a transverse Defines the direction of its stroke oriented direction Q, while he is free in his stroke direction from the recording 14 is movable.

Description

The The invention relates to an air spring trailing arm arrangement for a vehicle axle, which is an air spring and a swivel having mounted trailing arm. The air spring includes a rolling bellows with a rolling fold and a rolling bellows worn Rolling piston. The rolling piston can be unrolling the Abrollfalte in a lifting movement over a limited stroke in the Move the bellows in and out of it. It contributes the rolling piston at its free, out of the rolling bellows Front side of a plug body and is in normal driving supported on the trailing arm. About that In addition, the invention relates to a with such an air spring trailing arm arrangement equipped bogie for a commercial vehicle.

Air spring-trailing arm assemblies and equipped axle units of the here in question Type, for example, for the storage of the axles of trailers or semi-trailers of commercial vehicles.

In the DE 103 58 792 A1 an air spring is shown with a rolling piston, in which the rolling piston carries at its free, out of the rolling bellows end face a projecting conical pin.

Since the DE 103 68 792 A1 not with an air spring trailing arm combination, but with the possibility of a metrological detection of the movements of the bellows of the air spring busy, missing in the DE 103 68 792 A1 however, any explanation of the function of the projection and its interaction with a trailing arm.

The principle underlying an air spring trailing arm assembly of the type according to the invention is based on the DE 42 03 372 C1 known. It is essential that the air spring and the trailing arm are not permanently firmly coupled together, but in normal driving the connection between trailing arm and air spring is secured by pure positive engagement. Since the rolling piston of the air spring is supported only on the trailing arm, the trailing arm can swing with complete relief of each associated with him axis from its occupied in normal driving position driving freely in a relaxed position in which no more contact between the air bellows and trailing arm more consists. In this way it is ensured that the rolling bellows of the air spring with complete relief of the axle does not have to absorb the weight of the trailing arm and the axle. Damage to the rolling bellows of the air spring is safely avoided.

To A complete relief of the axle may be in air spring trailing arm assemblies the type in question here, for example, in the crane loading each equipped with them air-suspended trailers or come in repair work.

To accomplish such a positive connection between rolling piston and trailing arm is in the from DE 42 03 372 C1 known air spring of the rolling piston down funnel-shaped open. On the trailing arm a matching in the rolling piston centering cone is mounted, which sits in the normal driving position of the trailing arm form fit in the funnel-shaped opening of the rolling piston. In this way, the position of the rolling piston in normal driving by positive engagement between the rolling piston and the centering cone is set so that the rolling piston can safely follow the running in the driving operation of the trailing arm pivotal movements.

The from the DE 42 03 372 C1 known trailing arm air spring assembly is part of a bogie, in which the trailing arm is formed of a spring steel sheet of great thickness and connected to a rectangular cross-section, made of steel axle tube by means of U-shaped clamping bracket, which is placed around the axle tube and to the free Ends of their legs are braced against the trailing arm.

Like in the EP 0 830 959 B1 or the DE 10 2006 009 441 A1 summarized further, in the prior art, in addition to this type of clamping connection, the trailing arm and the axle each carried by them, for example, by screwing or welding connected. In addition to such trailing arms, which are made of spring steel, there are also trailing arms in use, which are made of cast steel and are welded to the axis also made of steel axle ( DE 10 2006 009 441 A1 ).

Independently of whether the trailing arm of spring steel or cast steel are manufactured, is the production of such Achsaggregaten equipped elements consuming. Such is the case with the Spring steel existing trailing arms a large Number of components and a correspondingly high assembly costs required to make a permanently fixed connection of trailing arm and axle tube. In addition, the deformability of spring steel limited so that the made of this material Trailing arm can only be designed very simple.

The use of steel or cast aluminum on the other hand has the advantage that one has greater freedom in the design of trailing arm shape and the trailing arm still with the welded steel axle tube. However, this is offset by the disadvantage that steel casting is susceptible to errors, especially tends to blowholes, so that a lot of effort for the quality assurance and testing of the individual consisting of cast steel trailing arm must be driven.

In front the background of the above-mentioned state of the Technology was the object of the invention is an air spring trailing arm assembly to create that is easy to manufacture and at the same time with minimal space requirements an optimal function the air suspension is possible. In addition, should a using a trailing arm air spring assembly according to the invention can be specified economically producible axle unit.

In Reference to the trailing arm air spring assembly is this Problem solved according to the invention been that such a trailing arm air spring assembly having the features specified in claim 1. Advantageous embodiments the trailing arm air spring assembly according to the invention are in the claims back to claim 1 specified.

Regarding the axle assembly is the above object according to the invention thereby has been solved that the axle assembly according to claim 12 is formed.

A Inventive air spring trailing arm arrangement for a vehicle axle has an air spring, which in known per se a rolling bellows with a Abrollfalte and comprises a roll-supported rolling piston. The rolling piston can itself while unrolling the Abrollfalte in a lifting movement a limited stroke into and out of the rolling bellows move. At its free, out of the rolling bellows out front side the rolling piston carries a plug body. Of Further comprises a trailing arm air spring arrangement according to the invention also a pivotally mounted trailing arm on which the rolling piston the air spring is supported in normal driving.

According to the invention now even with such a trailing arm air spring arrangement the trailing arm designed as a casting.

Especially cost can be an inventive Produce trailing arm by integrating it is poured. In the case of more complex shape or to avoid oversized castings can the trailing arm according to the invention also composed of at least two separately pre-cast castings be, the material and / or non-positively fixed are connected.

According to the invention the casting technology produced trailing arm a Handlebar arm with a bearing for pivotal mounting of the trailing arm on Frame of the vehicle, a receptacle for an axis of Vehicle and a support arm.

In the support arm according to the invention is a corresponding molded to the plug body of the rolling piston of the air spring Molded recess in which the plug body of the rolling piston in normal driving position of the trailing arm so sitting that the recess the plug body in a direction transverse to the direction its stroke-oriented direction, while he freely moves in the direction of his stroke movement from the recording is.

When used in a trailing arm air spring assembly according to the invention, as a single piece casting produced trailing arm thus not only the required for the function of the trailing arm form elements, such as arm, arm and axle are integrated, but according to the invention also a recording, via a form-fitting Connection between the rolling piston of the air suspension and the trailing arm during normal driving exists. Even with a trailing arm air spring arrangement according to the invention thus the rolling piston separates automatically from the trailing arm when the trailing arm is pivoted with complete relief of the respective vehicle axle over a maximum lowered position of the rolling piston out. The invention thus makes it possible with minimal component count and correspondingly minimized production costs, the advantages of the DE 42 03 372 C1 basically known principle of coupling of air spring and trailing arm to use, without that the usable volume of the air spring limited or additional components, such as on the support arm of the trailing arm to be fastened centering cones or the like are required.

• a) der Elastizitätsmodul E_L des Metallgusswerkstoffs des Längslenkers ist geringer als der Elastizitätsmodul E_A des Metallwerkstoffs der Achse;
• b) die Bruchfestigkeit Rm des Metallgusswerkstoffs des Längslenkers ist größer als die Bruchfestigkeit Rm des Metallwerkstoffs der Achse (2);
• c) die Streckgrenze R_eS oder – sofern der Metallgusswerkstoff keine ausgeprägte Streckgrenze aufweist – die Dehngrenze R_p0,2 des Metallwerkstoffs, aus dem der Längslenkers besteht, ist höher als die Streckgrenze R_eS bzw. Dehngrenze R_p0,2 des Metallwerkstoffs der Achse

und der Längslenker in Folge einer Umformoperation mindestens im Bereich seines die Achse umgebenden Verbindungsabschnitts unter einer elastischen Spannung steht, während die Achse durch ein Aufweiten mindestens im Bereich ihres vom Längslenker umgriffenen Kopplungsabschnitts bleibend plastisch verformt ist, so dass der Längslenker und die Achse durch Kraftschluss drehfest miteinander verbunden sind.An axle assembly according to the invention has, in addition to a trailing arm air spring assembly according to the invention an axis made of a steel material, which is non-rotatably connected by means of a seated in a receptacle of the trailing arm coupling portion of the axis frictional connection with the trailing arm of the air spring trailing arm arrangement. For this purpose, the metal casting material of the trailing arm and the steel material of the axle are coordinated so that at least one of the following conditions is met:

• a) the modulus of elasticity E _{L of} the metal casting material of the trailing arm is less than the modulus of elasticity E _{A of} the metal material of the axle;
• b) the breaking strength Rm of the metal casting material of the trailing arm is greater than the breaking strength Rm of the metallic material of the axle ( 2 );
• c) the yield strength R _eS or, if the metal casting material does not have a pronounced yield strength, the yield strength R _{p0,2 of} the _{metallic material constituting} the _{trailing arm} is higher than the yield strength R _eS or yield strength R _{p0,2 of} the _metallic material of the axle

and the trailing arm as a result of a forming operation is under an elastic tension at least in the region of its connecting portion surrounding the axis, while the axis is permanently plastically deformed by a widening at least in the region of its coupling portion encompassed by the trailing arm, so that the trailing arm and the shaft rotationally fixed by traction connected to each other.

The purely casting technology, one-piece production of Trailing arm of a trailing arm air spring assembly according to the invention thus not only allows the air spring under maximum utilization of their Coupling spring volume with the trailing arm and thereby to exclude the risk of overloading the air spring, but also a particularly simple, yet reliable connection between the trailing arm of the axle carried by him.

at need a bogie invention in the area of the connection between trailing arm and axle no additional components, such as clamps, Fittings or similar can be arranged. Also can the material thickness of the axis and the receiving the axis Recording surrounding portion of the trailing arm minimized be done since no welding must be, which otherwise trailing arm or Axis could weaken. That way you can minimizes the wall thicknesses of connecting section and axle tube become with the consequence that an inventive Achsaggregat especially in the pivoting direction of the trailing arm occupies a minimized space.

There at the same time by the indentation according to the invention needed for the guidance of the rolling piston Recording is molded in the arm of the trailing arm, thus the volume taken up by the rolling piston in the rolling bellows restricts an unavoidably needed rest can also be the dimensions of a Trailing arm air spring assembly used air spring in total be minimized. An inventive trailing arm air spring assembly accordingly takes in the pivoting direction of its trailing arm minimal space. This allows, for example, under the respective vehicle available space maximum in favor of the usable To minimize loading space of the respective transport vehicle.

The production of a bogie according to the invention can be carried out in a particularly simple manner. To this end, an axle having at least one hollow and externally accessible coupling portion and a trailing arm are provided which has a receptacle for the coupling portion of the axle, wherein the inside width of the receptacle in relation to the outer dimensions of the coupling portion of the axis so is dimensioned that the coupling portion of the axle with game is inserted into the receptacle. At the same time, in the already explained manner according to the invention, the modulus of elasticity of the casting material of the trailing arm ( 3 ) lower than the modulus of elasticity of the steel material, from which in the trailing arm ( 3 ) seated coupling section ( 6 ) of the axis ( 2 ) and / or the yield strength R _eS or, if the metal material does not have a pronounced yield strength, the yield strength R _{p0,2 of} the metal material _composing the connecting _{portion of} the _{trailing arm} is higher than the yield strength R _eS or yield strength R _{p0,2 of} the Metal material of the embraced by him coupling portion of the axis.

The thus provided axis is then with the trailing arm so joined together, so that the coupling portion of the axle in the receptacle of the trailing arm sitting.

thereupon the coupling portion of the axis is widened until the joint gap between the inner surface of the receptacle of the trailing arm and the outer surface of the coupling portion of Axis is closed. About the width of the joint gap or after joining between trailing arm and the axis existing game can be given the amount, around which the coupling section is deformed, before the trailing arm is widened. This way you can ensure that the deformation of the coupling portion in the course of the expansion respectively progresses so far that the plastic area reaches safely becomes.

The Expansion of the coupling section of the axis is then continued until the connecting portion of the trailing arm is elastic and the coupling portion of the axis is permanently plastically deformed, so that the connecting section after discharge under an elastic Tension stands, through which a frictional connection between the trailing arm and the axle is effected.

A maximum restoring force in the connecting portion of the trailing arm is obtained when the connecting portion is stretched in the course of expansion to the extent that in Verbindungsab prevailing stresses are within the range of its respective yield strength. A deformation of the connecting portion located in the part-plastic region is acceptable as long as it is ensured that a sufficient differential resiliency for a traction between trailing arm and axle remains. It is essential in each case that the springback of the coupling portion of the axle is in each case less than the resilience of the coupling portion encompassing the connecting portion of the trailing arm.

The Safety of the compound of the invention of Trailing arm and axle can be further increased, that trailing arm and axle in addition to the non-positive Connection are positively connected with each other by a Form element of the axis form-fitting with a corresponding shaped form element of the trailing arm cooperates. at Such Achsaggregaten invention, at those of the trailing arm of a possibly limited cold deformable Material, such as iron casting, and at least the coupling portion the axis of a more deformable material, such as a steel, this can be done, for example be that the shape element of the axis in the radial direction outward projection and the corresponding shaped form element of the trailing arm is a recess, in which the projection of the axis engages positively.

A such designed positive connection can in the Practice be generated by the fact that already in the prefabrication of the trailing arm in the inner surface of the receptacle of the trailing arm is formed a recess. To the joining of trailing arm and axle is then at the coupling portion of the axis generates a projection which in this recess engages.

Of the Advantage can be practical by a after the Joining accomplished cold forming operation. For this purpose, a stamp-like tool in the hollow coupling section are used, which is introduced into the coupling section and from the bounded by the coupling portion interior in radial Direction against the outer wall of the coupling portion of the Axis acts. The recess of the connecting portion of the trailing arm serves as a template, so that automatically ensured is that the projection after completion of the deformation process positively and essentially free of play engages in the recess.

conveniently, becomes the projection before the widening of the coupling portion of the axle generated. During the subsequent expansion then the seat the projection in the receptacle of the trailing arm in addition optimized. Depending on the available Plant technology can be used with a view to minimizing the processing times However, it may also be appropriate to produce the Projection and the expansion of the coupling portion in one go perform.

Optimal the advantages of a device according to the invention can be exploited Trailing arm air spring arrangement, when the trailing arm cast from a cast iron or aluminum casting material. This result especially when the compound in accordance with the invention Way is generated by traction, particularly favorable Characteristics of the trailing arm when the trailing arm is off Ductile cast iron (cast iron with nodular graphite, "GJS") cast is.

By doing the rolling piston has a rigid bottom plate, the plug body carries and in the normal driving position of the trailing arm is supported on the support arm, not only in a simple way the optimal safe support of the air spring on the support arm ensures the trailing arm, but it is also spares the rolling fold of the bellows, as these are due to safe support in well-defined, predictable Way during the stroke movements occurring in practical driving can roll off the rolling piston.

in the Regarding the function of the rolling piston and the utilization of the it is enclosed by it volume for the air spring expedient when the rolling piston is a tightly closed Base plate owns. A particularly rigid bottom plate of low But weight can also be achieved by the fact that the bottom plate is designed as a grid construction. Should the rolling piston still towards the outer environment of the air spring be tight, this can in addition to the grid a thin Be provided sealing on the bottom plate.

to Simplification of manufacturing and assembly can be the plug body be integrally formed on the rolling piston.

is the rolling piston formed hollow and against the environment the air spring tightly closed, so can the vom Use rolling piston enclosed volume for the air spring, when in contact with the volume enclosed by the rolling bellows stands.

The automatic finding of an optimal fit of the plug body of the rolling piston in the associated receptacle of the trailing arm of a trailing arm air spring arrangement according to the invention can be assisted by at least two opposite sides of the plug body between them form an acute angle. For this purpose, the plug body may have a wedge-shaped, conical or frusto-conical shape in the direction of its associated receptacle of the trailing arm tapered shape. Taking into account the occurring in practice pivoting paths of the trailing arm while the included between the two opposite sides of the plug body angle is 30 ° to 60 °. The receptacle is then shaped in a corresponding manner so that their peripheral surfaces run obliquely from one another, starting from their opening assigned to the plug body.

The Assembly of an air spring according to the invention can be simplified in a conventional manner that the Rolling bellows one fixed to the underside of the vehicle chassis has verkoppelbaren lid. The rolling bellows of the air spring can thereby be attached to the bottom of the lid to roll in and out to facilitate its rolling fold.

The Safety of the support of the air spring on the support arm of the Trailing arm can additionally be improved be that the area of the arm of the trailing arm, supported on the air spring in normal driving is, to a footprint for the rolling piston widened, in which the recess is incorporated.

following The invention will be illustrated with reference to an exemplary embodiments Drawing explained in more detail. Each show schematically:

1 a trailing arm air spring assembly in normal driving position in a side, partially cutaway view;

2 the trailing arm air spring assembly in a view from below;

3a - 3c the trailing arm air spring arrangement in different operating positions.

The air spring trailing arm arrangement 1 a commercial vehicle, not shown here, which is in particular a trailer for a semitrailer is part of a axle assembly, in addition to the trailing arm air spring assembly 1 an axis 2 includes.

The trailing arm air spring assembly 1 has a trailing arm 3 made of nodular cast iron (cast iron with nodular graphite). The casting material used for this purpose is, for example, the iron casting material known under the name "GJS 600".

The trailing arm 3 has a centrally located, sleeve-like connecting portion 4 in which an axle mount 5 is molded in one at one end of the axle 2 trained coupling section 6 sitting.

On one side of the connection section 4 of the longitudinal member 3 is a handlebar arm 7 formed, which is transverse to the axis 2 extends. At its free end is in the handlebar arm 7 a bearing eye 8th molded, over which the trailing arm 3 on a console 9 is mounted pivotably about a pivot axis, which is axially parallel to the axis 2 extends. The console 9 is with a side member only indicated here 10 the vehicle is not shown firmly connected.

On the handlebar arm 7 opposite side of the connecting portion 4 has the trailing arm 3 a support arm 11 on, whose free end to a plate-shaped support section 12 is widened. On his the side member 10 associated side is on the support section 12 a substantially circular footprint 13 educated. In the middle of the footprint 13 is in the support section 12 of the support arm 11 a trained as a passage opening recording 14 molded, whose peripheral wall 15 starting from her the side member 10 associated inlet opening tapered in the direction of its bottom U of the trailing arm air spring assembly 1 associated output opening tapers. The opening angle β of the recording 14 lies between 30 ° and 60 °.

Furthermore, the trailing arm air spring arrangement 1 an air spring 16 on, over which the trailing arm 3 on the side member 10 is resiliently supported.

The air spring 16 includes a rolling bellows 17 who has a rolling-bellows coat 18 made of flexible material, preferably of rubber. The rolling bellows coat 18 is firm with its one edge area and tight with a lid 19 connected, fixed to the side member 10 is screwed. With its edge area is the Rollbalgmantel 18 in a rolling fold 20 to the interior of the rolling bellows 17 towards the lid 19 turned inside out. He lies close to the peripheral surface of a rolling piston 21 on, which is coaxial with the longitudinal axis L of the air spring 15 is aligned. In this way, the rolling piston 21 elastic in the rolling bellows 17 held and can perform in the direction of the longitudinal axis L Hubbewegungen H. According to the way covered this is the Abrollfalte 19 one (in the rolling bellows 17 retractable rolling piston 21 . 3b ) or rolled out (from the rolling bellows) 17 outgoing rolling piston 21 . 3c ).

Touches between the lid 19 and the rolling piston 21 be through one on top of the rolling piston 21 muted buffer damped.

At his free, from the air spring 15 prominent and designed as a stiffened bottom plate end face 22 carries the rolling piston 21 a plug body 23 , which is tapered in the direction of its free end tapered. The plug body 23 is integral with the front side 22 connected and manufactured for example as an aluminum casting. Other materials, such as metal alloys or fiber reinforced plastics, are used as materials and are suitable for the production of the plug body 23 or - in a separate prefabrication - for the frontal wall, at the front side 22 is trained.

The position of the air spring 15 and the plug body 23 as well as the dimensions and shape of the plug body 23 are doing so to the position and the dimensions of the recording 14 of the trailing arm 3 adapted that of the plug body 23 in normal driving position ( 1 . 3a . 3b ) located trailing arm 3 positive and play-free in the recording 14 sitting. The rolling piston 21 is this way through the peripheral wall 15 the recording 14 set in a direction aligned transversely to its stroke Q. The on the footprint 13 of the support arm 11 sitting front 22 of the rolling piston 19 and the lid 18 of the rolling bellows 16 or the underside of the longitudinal member 10 are aligned substantially parallel to each other.

In one to the connection section 4 adjacent area of the handlebar arm 7 is on the handlebar arm 7 a console 24 molded, on which a conventional shock absorber 25 is pivotally mounted with its one end bearing eye. With its arranged at its other end bearing eye is the shock absorber 25 at the same time with the vehicle side member 10 connected console 9 stored.

For a non-rotatable connection between the trailing arm 3 and the axis 2 becomes the axis 2 in the axle 5 of the trailing arm 3 plugged until their coupling section 6 with play in the axle 5 sitting.

Subsequently, the coupling section 6 the axis 2 by a suitable method, for example by hydroforming, expanded in the radial direction until its outer surface is close to the inner surface of the axle 5 is applied. The between the inner surface of the axle 5 and the outer surface of the coupling portion 6 in the assembled state originally existing game is dimensioned so that in the coupling section 6 with reaching the inner surface of the axle 5 existing stresses are at least in the range of the yield strength R _{eS of} the steel from which the axis 2 is made.

Accordingly, the coupling section is located 6 the axis 2 at least at the beginning of its plastic deformation.

With continued pressurization now also the coupling section 6 completely encompassing connection section 4 of the trailing arm 3 widened.

This process continues until in the connection section 4 After discharge voltages remain, leaving the deformed connection section 4 on the plastically deformed coupling section 6 exerts a pressure that is sufficient to a permanently non-rotating positive connection between the trailing arm 3 and the axis 2 to ensure.

If necessary, the frictional connection of axle 2 and trailing arm 3 be secured by a positive connection. This can be done in the inner surface of the axle 5 a recess (not shown) may be formed, into which by means of a from the interior of the coupling portion 6 fro cold forming operation Material of the coupling section 6 is pressed. In this way engages a radially from the coupling portion 6 projecting, not visible here projection positively in the recess of the axle 5 without the need for additional form elements or components. The projection is preferably generated before the expansion in order to ensure that the material forming the projection of the axis 2 when expanding so in the recess of the axle 5 flows, that the recess is substantially completely filled.

Will the axis 2 For example, when loading on a ship lifted by a crane, so is the axis 2 relieved of the burden on her during normal driving. Then the trailing arm pivots 3 towards its bottom U down to a position where the recording 14 of the longitudinal member 3 at a distance from the side member 10 which is larger than the lowest position, the rolling piston 21 with its plug body 23 can take. As soon as this lowest position is reached, the plug body accordingly leaves 23 the recording 14 so that the side member 3 can move freely until he has reached his final position.

If the vehicle is then put back on its wheels and the axle 2 accordingly spre After being loaded again, the side member pivots 3 in the direction of the longitudinal member 10 , Once the recording 14 of the longitudinal member 3 on her swing the plug body 23 have reached this, due to its conical shape and the corresponding funnel shape of the recording 14 automatically his proper seat in the recording 14 ,

1

Air suspension trailing arm arrangement

2

axis

3

Trailing arm

4

Connecting portion of the trailing arm 3

5

Axle holder of the trailing arm 3

6

Coupling section of the axis 2

7

control arm

8th

Bearing eye of the handlebar arm 7

9

console

10

longitudinal beams

11

Beam

12

Support section of the support arm 11

13

Footprint of the support arm 11

14

Recording the trailing arm 3

15

Peripheral wall of the receptacle 14

16

air spring

17

bellows

18

Rollbalgmantel

19

cover

20

Roll-off fold of the rolling bellows 17

21

roll-off

22

Front side of the rolling piston 21

23

plug body

24

console

25

Shock absorber Opening angle of the recording 14

L

Longitudinal axis L of the air spring 15

H

Lifting movements of the rolling piston 21

Q

Direction transverse to the lifting movement of the rolling piston 21

U

Bottom of trailing arm air spring assembly 1

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10358792 A1 [0003]
• - DE 10368792 A1 [0004, 0004]
• - DE 4203372 C1 [0005, 0007, 0008, 0020]
• - EP 0830959 B1 [0009]
• - DE 102006009441 A1 [0009, 0009]

Claims (15)

Air Spring Trailing Arm Arrangement ( 1 ) for a vehicle axle ( 2 ), - with an air spring ( 16 ), - the one rolling bellows ( 17 ) with a roll-off fold ( 18 ) and - one of the rolling bellows ( 17 ) carried rolling piston ( 21 ), which under unrolling the rolling fold ( 18 ) in a lifting movement over a limited stroke (H) in the rolling bellows ( 17 ) is movable in and out of it, - wherein the rolling piston ( 21 ) on its free, out of the rolling bellows ( 17 ) frontend ( 22 ) a plug body ( 23 ), and - with a pivotally mounted trailing arm ( 3 ), - on which the rolling piston ( 21 ) of the air spring ( 16 ) is supported in normal driving, characterized in that - the trailing arm ( 3 ) is cast from a cast metal material and - a handlebar arm ( 7 ), the - a warehouse ( 8th ) for pivotally supporting the trailing arm ( 3 ) on the frame ( 10 ) of the vehicle, - an axle mounting ( 5 ) for one axis ( 2 ) of the vehicle and - a support arm ( 11 ), in which a corresponding to the plug body ( 23 ) of the rolling piston ( 21 ) shaped recess ( 14 ) is formed, - in which the plug body ( 23 ) in normal driving position of the trailing arm ( 3 ) is seated so that the recess ( 14 ) the plug body ( 23 ) in a direction transverse to the direction of its stroke oriented direction (Q), while in its stroke direction free from the recording ( 14 ) is movable. Air spring trailing arm arrangement according to claim 1, characterized in that the trailing arm in one piece is poured. Air spring trailing arm arrangement according to claim 1, characterized in that the trailing arm of at least two material and / or non-positively connected Castings is composed. Air spring trailing arm arrangement according to one of the preceding claims, characterized in that the trailing arm ( 3 ) is cast from a cast aluminum material. Air spring trailing arm arrangement according to one of claims 1 to 3, characterized in that the trailing arm ( 3 ) is cast from a cast iron material. Air spring trailing arm arrangement according to claim 5, characterized in that the trailing arm ( 3 ) consists of a ductile iron material. Air spring trailing arm arrangement according to one of the preceding claims, characterized in that the rolling piston ( 21 ) has a rigid bottom plate, the plug body ( 23 ) and in the normal driving position of the trailing arm ( 3 ) on the support arm ( 11 ) is supported. Air spring trailing arm arrangement according to one of the preceding claims, characterized in that the rolling piston ( 21 ) is hollow and relative to the environment of the air spring ( 16 ) is sealed, while the volume surrounded by it with the rolling bellows ( 17 ) enclosed volume communicates. Air spring trailing arm arrangement according to one of the preceding claims, characterized in that at least two opposite sides of the plug body ( 23 ) include an acute angle (β) between them. Air spring trailing arm arrangement according to claim 9, characterized in that the plug body ( 23 ) wedge-shaped, conical or frustoconical in the direction of its associated recording ( 14 ) of the trailing arm ( 3 ). Air spring trailing arm arrangement according to claim 9 or 10, characterized in that between the two opposite sides of the plug body ( 23 ) included angle (β) is 30 ° to 60 °. Air spring trailing arm arrangement according to one of the preceding claims, characterized in that the plug body ( 23 ) in one piece on the rolling piston ( 3 ) is formed. Air spring trailing arm arrangement according to one of the preceding claims, characterized in that the rolling bellows ( 17 ) a firmly coupled to the underside of the vehicle chassis cover ( 19 ) having. Air spring trailing arm arrangement according to one of the preceding claims, characterized in that the region of the support arm ( 11 ) of the trailing arm ( 3 ), on which the air spring ( 16 ) is supported in normal driving, to a footprint ( 13 ) for the rolling piston ( 21 ) is widened, in which the recess ( 14 ) is incorporated. Axle aggregate for a commercial vehicle, having a trained according to one of claims 1 to 14 air spring trailing arm assembly ( 1 ) and an axle made of a steel material ( 2 ), which by means of a widening one in an axle 5 ) of the trailing arm ( 3 ) sitting coupling section ( 6 ) of the axis ( 2 ) caused frictional connection with the trailing arm ( 3 ) the Luftfe the trailing arm arrangement ( 1 ) is rotatably connected by the metal casting material of the trailing arm ( 3 ) and the steel material of the axle ( 2 ) are coordinated so that at least one of the following conditions is met: a) the modulus of elasticity E _{L of} the metal casting material of the trailing arm ( 3 ) is less than the modulus of elasticity E _{A of} the metal material of the axis ( 2 ); b) the breaking strength Rm of the metal casting material of the trailing arm ( 3 ) is greater than the breaking strength Rm of the metallic material of the axle ( 2 ); c) the yield strength R _eS or, if the metal casting material does not have a pronounced yield strength, the yield strength R _{p0,2 of} the _metallic material from which the trailing _arm ( 3 ) is higher than the yield strength R _eS or yield strength R _{p0.2 of} the metal material of the axis ( 2 ) and the trailing arm ( 3 ) as a result of a forming operation at least in the region of its axis ( 2 ) surrounding connection section ( 4 ) is under an elastic stress, while the axis ( 2 ) by widening at least in the region of its trailing arm ( 3 ) engaged coupling section ( 6 ) is permanently plastically deformed, so that the trailing arm ( 3 ) and the axis ( 2 ) are non-rotatably connected to each other by adhesion.