DE102008053886B4 - Air spring trailing arm arrangement and axle unit for a vehicle axle - Google Patents

Abstract

Air spring / trailing arm arrangement (1) for a vehicle axle (2), - with an air spring (16), - a rolling bellows (17) with a roll-off fold (20) and - a rolling piston (21) carried by the rolling bellows (17) ) comprises, - which can be moved into and out of the bellows (17) in a lifting movement over a limited stroke (H) while rolling the roll-off fold (20), - with a pivotably mounted trailing arm (3), - on which the The rolling piston (21) of the air spring (16) is supported during normal driving, wherein - the trailing arm (3) - a connecting arm (7) with a bearing (8) for pivotably mounting the trailing arm (3) on the frame (10) of the vehicle, and - an axle receptacle (5) for an axle (2) of the vehicle and - has a support arm (11), characterized in that - the trailing arm (3) is cast from a cast metal material and - the rolling piston (21) on its .. .

Description

The invention relates to an air spring trailing arm arrangement for a vehicle axle according to the preamble of claim 1. In addition, the invention relates to a equipped with such an air spring trailing arm assembly axle assembly for a commercial vehicle.

Air spring trailing arm assemblies and equipped axle assemblies of the type in question here are used for example for supporting the axles of trailers or semitrailers 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 58 792 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 58 792 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.

For a complete relief of the axle, it can come in air spring trailing arm assemblies of the type in question here, for example, in the crane-loading of each equipped with them air-suspended trailers or 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 ).

Regardless of whether the trailing arms are made of spring steel or cast steel, the production of elements equipped with such axle assemblies is complex. Thus, in the existing of spring steel trailing arms a large number of components and a correspondingly high assembly costs required to produce a permanent solid connection of trailing arm and axle tube. In addition, the deformability of spring steel is so limited that the trailing arm made of this material 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 can still weld to the existing 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.

Against the background of the above-described prior art, the object of the invention was to provide an air spring trailing arm To create an arrangement that is easy to manufacture and at the same time with minimal space requirements, an optimal function of the air suspension is possible. In addition, should be specified using a trailing arm air spring assembly according to the invention inexpensive to produce bogie.

With regard to the trailing arm air spring arrangement, this object has been achieved according to the invention in that such a trailing arm air spring arrangement has the features specified in claim 1. Advantageous embodiments of the trailing arm air spring arrangement according to the invention are specified in the dependent claims on claim 1.

With regard to the axle assembly, the above object has been achieved according to the invention in that the axle assembly is designed according to claim 15.

An air spring trailing arm arrangement according to the invention for a vehicle axle has an air spring which, in a manner known per se, comprises a rolling bellows with a rolling fold and a rolling piston carried by the rolling bellows. The rolling piston can move while rolling the Abrollfalte in a lifting movement over a limited stroke in the rolling bellows in and out of it. At its free, out of the rolling bellows out facing end of the rolling piston carries a plug body. Furthermore, a trailing arm air spring arrangement according to the invention also comprises a pivotably mounted trailing arm, on which the rolling piston of the air spring is supported during normal driving.

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

Particularly cost-effective, a trailing arm according to the invention can be produced in that it is cast in one piece. In the case of more complex shaping or also to avoid oversized castings, the trailing arm according to the invention may also be composed of at least two separately pre-cast castings, which are firmly connected to one another in a material and / or non-positive manner.

According to the invention, the suspension arm produced by casting has a link arm with a bearing for pivotally supporting the trailing arm on the frame of the vehicle, a receptacle for an axle of the vehicle and a support arm.

In the support arm according to the invention a corresponding formed to the plug body of the rolling piston of the air spring recess is formed, in which the plug body of the rolling piston in normal driving position of the trailing arm sits so that the recess defines the plug body in a direction transverse to the direction of its stroke direction, while in Direction of its stroke movement is freely movable from the recording.

Be used in a trailing arm air spring assembly according to the invention, as a 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

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 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 at least in the area of his Axis surrounding connecting portion is under an elastic tension, while the axis is permanently plastically deformed by a widening at least in the region of its engaged by the trailing arm coupling portion, so that the trailing arm and the axis are non-rotatably connected to each other by traction.

The pure casting technical, one-piece production of the trailing arm of a trailing arm air spring assembly according to the invention thus not only allows to couple the air spring with maximum utilization of its spring volume with the trailing arm and thereby eliminate the risk of overloading the air spring, but also a particularly simple and yet reliable connection between the trailing arm of the axle carried by him.

In a bogie according to the invention no additional components, such as clamps, fittings or similar need to be arranged in the region of the connection between trailing arm and axle. Also, the material thickness of the axle as well as the portion of the trailing arm surrounding the axle receiving receptacle can be minimized since no welding work is required which could otherwise weaken the trailing arm or axle. In this way, the wall thicknesses of connecting portion and axle tube can be minimized, with the result that an axle unit according to the invention occupies a minimized space, in particular in the pivoting direction of the trailing arm.

Since, at the same time, the receptacle required for the guidance of the rolling piston is formed by the indentation according to the invention into the arm of the trailing arm, the volume occupied by the rolling piston in the rolling bellows can thus be limited to an unavoidably required rest. The dimensions of a trailing arm air suspension system can also be limited. Arrangement used air spring can be minimized overall. A trailing arm air spring arrangement according to the invention accordingly takes up minimal space in the pivoting direction of its trailing arm. This makes it possible, for example, to minimize the space present under the respective vehicle to the maximum extent in favor of the usable 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 having a receptacle for the coupling portion of the axle are first provided, the inside width of the receptacle being in relation to the outside dimensions of the coupling portion of the axle 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 axle is then joined together with the trailing arm, so that the coupling portion of the axle sits in the receptacle of the trailing arm.

Thereafter, the coupling portion of the axle 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 the axle is closed. Over the width of the joint gap or the existing after the joining between the trailing arm and the axis game while the amount can be specified by which the coupling portion is deformed before the trailing arm is widened. In this way, it is possible to ensure that the deformation of the coupling section in the course of the expansion progresses to such an extent that the plastic region is reliably reached.

The expansion of the coupling portion of the axle is then continued until the connecting portion of the trailing arm is elastically and the coupling portion of the axle is permanently plastically deformed, so that the connecting portion is under relief under load, through which causes a frictional connection between the trailing arm and the axle is.

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 such an extent that the stresses prevailing in the connecting portion are in 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 connection of trailing arm and axle according to the invention can be further increased by the fact that trailing arm and axle are positively connected to each other in addition to the non-positive connection by a form element of the axis cooperates form-fitting manner with a correspondingly shaped form element of the trailing arm. In such Achsaggregaten invention, in which the trailing arm of a possibly limited cold workable material, such as cast iron, and at least the coupling portion of the axis of a more deformable material, such as a steel, this can be accomplished, for example, characterized in that the molded element of Axis in the radial direction outwardly directed projection and the correspondingly shaped form element of the trailing arm is a recess into which the projection of the axis engages positively.

Such a form-fitting connection can be generated in practice that already in the prefabrication of the trailing arm in the inner surface of the receptacle of the trailing arm a recess is formed. After joining of trailing arm and axle, a projection is then produced on the coupling portion of the axle, which engages in this recess.

The projection can be practically produced by a cold forming operation carried out after the joining. For this purpose, in the hollow coupling portion stamp-like tool can be used, which is inserted into the coupling portion and acts from the space bounded by the coupling portion in the radial direction against the outer wall of the coupling portion of the axis. The recess of the connecting portion of the trailing arm serves as a die, so that it is automatically ensured that the projection engages positively and substantially free of play in the recess after completion of the deformation process.

Conveniently, the projection is created prior to the expansion of the coupling portion of the axle. During subsequent expansion, the seat of the projection in the receptacle of the trailing arm is then additionally optimized. Depending on the available installation technology, however, it may also be expedient to carry out the generation of the projection and the widening of the coupling section in one go with a view to minimizing the processing times.

The advantages of a trailing arm air spring arrangement according to the invention can be optimally utilized if the trailing arm is cast from cast iron or aluminum casting material. This results in particular when the connection is produced in accordance with the invention by adhesion, particularly favorable properties of the trailing arm, when the trailing arm of nodular cast iron (cast iron with Kugelgrafit, "GJS") is poured.

By the rolling piston having a rigid bottom plate which carries the plug body and which is supported in the normal driving position of the trailing arm on the support arm, the optimally secure support of the air spring on the support arm of the trailing arm is not only ensured in a simple manner, but it is also the Abrollfalte protected the rolling bellows, as these can roll due to the safe support in a well-defined, predictable manner during the occurring in practical driving strokes of the rolling piston.

With regard to the function of the rolling piston and the utilization of the volume enclosed by it for the air spring, it is expedient if the rolling piston has a tightly closed bottom plate. A particularly rigid base plate of low weight but can also be achieved in that the bottom plate is designed as a grid construction. If the rolling piston should nevertheless be tight against the external environment of the air spring, a thin sealing layer may be provided on the bottom plate in addition to the grid.

To simplify the manufacture and assembly of the plug body may be integrally formed on the rolling piston.

If the rolling piston is hollow and tightly sealed from the environment of the air spring, then the volume enclosed by the rolling piston can be used for the air spring when it is in communication with the volume enclosed by the rolling bellows.

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 assembly according to the invention can be supported, that include at least two opposite sides of the plug body between them 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 in that the rolling bellows has a firmly coupled to the underside of the vehicle chassis cover. The rolling bellows of the air spring can be attached to the underside of the lid to facilitate the rolling and unrolling its Abrollfalte.

The safety of the support of the air spring on the support arm of the trailing arm can be further improved by the fact that the region of the support arm of the trailing arm, on which the air spring is supported in normal driving, is broadened to a footprint for the rolling piston, in which the recess is incorporated.

The invention will be explained in more detail with reference to an exemplary embodiments illustrative drawing. 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 charged accordingly again, the longitudinal beam 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 ,

LIST OF REFERENCE NUMBERS

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

β

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

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 ( 20 ) and - one of the rolling bellows ( 17 ) carried rolling piston ( 21 ), which under unrolling the rolling fold ( 20 ) in a lifting movement over a limited stroke (H) in the rolling bellows ( 17 ) is movable in and out of it, - with a pivotally mounted trailing arm ( 3 ), - on which the rolling piston ( 21 ) of the air spring ( 16 ) is supported in normal driving, wherein - the trailing arm ( 3 ) - a handlebar arm ( 7 ) with a bearing ( 8th ) for pivotally supporting the trailing arm ( 3 ) on the frame ( 10 ) of the vehicle, and - an axle mounting ( 5 ) for one axis ( 2 ) of the vehicle and - a support arm ( 11 ), characterized in that - the trailing arm ( 3 ) is cast from a cast metal material and - the rolling piston ( 21 ) on its free, out of the rolling bellows ( 17 ) pointing out front side ( 22 ) a plug body ( 23 ), and - in the support arm ( 11 ) 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 ( 3 ) is cast in one piece. Air spring trailing arm arrangement according to claim 1, characterized in that the trailing arm ( 3 ) is composed of at least two materially and / or non-positively connected castings. 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 ) of the air spring 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.

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