DE102014218734A1 - Chassis arrangement with at least one liftable axle and carrier of such an axle - Google Patents

Abstract

A chassis assembly (10), in particular for commercial vehicles (1) (commercial vehicles) and / or trailers, with at least one liftable chassis axle (3) which is arranged upstream or downstream of a further axle (5), wherein the liftable chassis axle (3) at least substantially in the vehicle longitudinal direction oriented trailing arm (11) and at least substantially upstanding vibration damper (12) are assigned and wherein at least one with a vehicle frame (2) connectable carrier (20) for connecting at least one trailing arm (11) is provided, is formed in that the carrier (20) is provided both with at least one attachment possibility (14) for a trailing arm (11) and with at least one attachment possibility (15) for a vibration damper (12) and / or with at least one attachment possibility (16) for at least one air bellows (13) is provided. Furthermore, a carrier (20) of a liftable chassis axle (3) with a connection possibility (14) for a trailing arm (11) is proposed. The carrier (20) is characterized in that, in addition to the connection possibility (14) for the trailing arm (11), it has one or more further connection possibilities (15, 16) for a vibration damper (12) and / or an air bellows (11). 13).

Description

The invention relates to a chassis arrangement for commercial vehicles and / or trailers with at least one liftable chassis axle, which is upstream or downstream of another axis, according to the preamble of claim 1. The invention further relates to a carrier of a liftable suspension axle with a connection possibility for a trailing arm according to the preamble of independent claim 14.

It is known to provide liftable chassis axles on utility vehicles, semi-trailers or trailers. Under a chassis axle, which is often referred to simply as an axis, is to be understood a rigid cross-connection of wheels, which are arranged when viewed in a vehicle longitudinal direction at the same height on the outside of a vehicle. About the axis, which is also referred to in the context of the present invention as a rigid axle, the wheels are indirectly connected to a vehicle body. An axle is referred to as liftable if it is designed so that it can be lifted in the vehicle vertical direction. A lift axle does not run continuously on the road, but can be lifted at low load of the vehicle in the air. From this upper rest position without road contact, the liftable axle can be moved to a functional position with road contact down. In this functional position, the liftable axle carries part of the load. Such a construction is for example from the DE 100 40 656 B4 known. Since the liftable axles further, often driven, axes are located at a small distance upstream or downstream, it is often problematic to find a sufficient space for connection of all functional parts for the axles. In addition, different designs must be used - depending on how the further upstream or downstream axis is designed. In particular, the common constructions of liftable axles have the disadvantage that they can only be used in conjunction with an air-suspended adjacent axle. In the case of a leaf-sprung axle, which is still standard in particular outside Europe, the leaf springs, which extend far to the front and rear, have an even more limited installation space, so that the common types can not be used there or only with elaborate separate special parts. In addition, there is a need to deliver such liftable axle assemblies as far as possible pre-assembled to the production line and thus to enable the simplest possible assembly.

The invention is based on the problem of enabling a simplified assembly of suspension arrangements with liftable axles.

The invention solves this problem by a suspension arrangement with the features of claim 1 and by a carrier with the features of claim 14. For advantageous embodiments and further developments of the invention reference is made to the dependent claims.

With the invention, a suspension arrangement and a motor vehicle, in particular a commercial vehicle (commercial vehicle), as well as a trailer created in which at least one carrier connectable to a vehicle frame for connecting at least one trailing arm additionally with at least one connection possibility for a vibration damper and / or is provided with at least one connection possibility for at least one air bellows, a mounting relief achieved. The carrier is an inherently rigid structure which is suitable for the transmission of forces that are introduced into the latter via the at least one connection possibility. The carrier has a design inherent rigidity, which largely prevents deformation of the same under load. Under a trailing arm is in connection with the present invention, a two-point link, also called pendulum support to understand, which is oriented in the installed state substantially in the vehicle longitudinal direction. Trailing arms take over the longitudinal guidance of the axle. With a vibration damper is meant a system for damping mechanical vibrations (vibrations, shocks) which are introduced during driving on the road and the wheels in the axle. The vibration damper should at least reduce the transmission of these vibrations into the vehicle frame. The air bellows, which is also known as air bellows, is part of an air suspension. It is filled with compressed air, which forms a counterforce to the forces introduced over the road in the wheels during compression and rebound of the axle. The carrier can be delivered to a carrier unit preassembled with the trailing arm and the vibration damper and / or the at least one pneumatic bellows to the assembly line and bolted there, for example, with the frame, which provides a high process reliability in prefabricated holes. Misassembly or alignment of the other parts connected to the carrier is avoided. In addition, the number of required parts is low due to the example of a block-like carrier with multiple connection options.

A particular simplification results when the carrier is provided with at least one connection possibility for a trailing arm as well as with at least one connection possibility for a vibration damper and with at least one connection possibility for at least one air bellows. Then there are three Function group connections provided on the carrier, so that these three functional groups can also be delivered to the carrier pre-assembled to the assembly line. It is understood that per vehicle transverse side, for example, two bellows can be connected one behind the other to the carrier.

Even if the functional groups mentioned are not yet preassembled, the clear orientation and positioning of the connections creates a very high level of process reliability and simplification, even if the aforementioned parts are assembled only later.

An embodiment of the invention provides that the carrier is continuously extending in the vehicle transverse direction and has connection possibilities for trailing arms of both sides of the vehicle and / or for vibration absorbers of both sides of the vehicle and / or for air bellows on both sides of the vehicle. Then a module is created with the possibility for a very high degree of prefabrication, which can be particularly favorable depending on the training.

In particular, it is also possible that the carrier is additionally provided with a connection possibility for a lifting device for up and down movement of the liftable axle. As a result, a special assembly simplification is then also created with respect to this unit.

Next, it is convenient for a high degree of prefabrication and low assembly costs to keep the number of parts low. In particular, therefore, the carrier is integrally formed, for example as a cast or forged part. Even a prefabricated sheet metal welding group is understood in this sense as one piece. As a sheet metal welding group in this context, an embodiment of the carrier is to be understood as a welded construction in the individual components of the carrier, such as sheet metal blanks, are connected by welding to a one-piece carrier.

If the carrier has at least one flange plate for connection to a vehicle frame and from there at least substantially horizontally outward vehicle-facing support for connecting an upper end of a vibration damper and / or at least one Luftfederbalgs, results both in the holder of the carrier also with the connection of the further parts a high stability. The structure of the carrier is still very simple and inexpensive.

Further, it is advantageous if the carrier has at least one flange plate for connection to a vehicle frame and from there obliquely downward pointing cantilever for connecting a trailing arm. Preferably, the carrier is designed such that its obliquely downward pointing cantilever in installation position downwards away from the chassis axle. In the context of the present invention, a cantilever arm, which is also referred to as a cantilever, is to be understood as meaning a longitudinally extending section of the carrier. The longitudinally extending portion, at the end of the trailing arm is connected, is mainly claimed on bending. The trailing arm is then undoubtedly predefined in terms of its position and orientation and, in particular, can always assume the same position, regardless of whether the other axle is air-sprung or leaf-sprung. It must therefore be kept for the different types of suspension of the other axis in the carrier of the liftable axle not two different types, but the carrier may be formed similar in both cases.

Particularly favorable, the cantilever from the connection to the vehicle frame with an inclination of 30 ° to 50 ° against the vertical obliquely down and thus over a small longitudinal path bridge a large height difference. In this case, the cantilever can point in the direction of the further axis, without the distance between the liftable and the other axis would have to be increased. As a result, considerable space advantages are achieved. In another axle, which is sprung by leaf springs, the cantilever can engage under an end portion of the leaf springs, so that the liftable and the other axis can be very close to each other.

A carrier of a liftable chassis axle with a connection possibility for a trailing arm, which carrier is characterized in that it in addition to the connection possibility for the trailing arm one or more further connection possibility (s) for a vibration damper and / or an air bellows according to one or more of claims 1 to 10, is claimed separately. By integrating multiple attachment points into such a carrier, the number of components can be reduced. In addition, a comprehensive pre-assembled system can be realized with the carrier and the components connected to it.

Further advantages and features of the invention will become apparent from the drawing illustrated and described below embodiments of the subject invention.

In the drawing shows:

1 a schematic side view of a commercial vehicle (NKW) with a liftable axle and a carrier in an exemplary embodiment of his suspension arrangement according to the invention,

2 the liftable axle after 1 with attached thereto functional units in perspective view,

3 a perspective view obliquely from below of a girder-like carrier with connection possibilities for a trailing arm, a vibration damper and an air bellows.

One with one or more landing gear arrangements according to the invention 10 equipped motor vehicle 1 forms a commercial vehicle (commercial vehicle) such as a truck or a trailer or semi-trailer. The commercial vehicle 1 includes a vehicle frame 2 comprising lateral side members and a plurality of cross members connecting them. In the side view 1 only the side members can be seen. These can be a variety of holes for attaching parts of a suspension arrangement 10 have screw connections.

On the vehicle frame 2 are one or more landing gear arrangements 10 each with one or more liftable and each wheels 4 supporting axle (s) 3 arranged. The liftable axle (s) 3 is or are each transverse to the direction of travel 9 arranged. For several such liftable axles 3 is also possible that the chassis arrangement according to the invention 10 is provided only on a part of these axes, in particular on rear axles. Also, for example, a construction vehicle or an off-road vehicle may be designed according to the invention.

According to 1 is exactly one liftable axle 3 intended. This is another - driven here - axle 5 arranged upstream or downstream and can at high load or other high demands in a functional position in which the vehicle transverse direction 8th outside arranged wheels 4 Road contact have to be shifted down. In an upwardly displaced rest position of the liftable axle 3 have their wheels 4 no road contact. The displacement is essentially vertical, but may also include an angle to the vertical. In addition to the mentioned axes 3 . 4 can on the vehicle 1 other axles, such as a front axle 6 below a driver's cab 7 , be provided.

As a means to guide and inhibit unwanted movements of the liftable suspension axle 3 are at least substantially in the vehicle longitudinal direction oriented trailing arm 11 and at least substantially upstanding vibration dampers 12 (Also often referred to as shock absorbers) provided, wherein the trailing arm 11 also a clear angle to the horizontal and the vibration damper 12 can also have a significant angle to the vertical. A longitudinal and transverse guidance of the axle 3 about, for example, wishbone, as in 2 drawn in, is possible.

Furthermore, at least one with the vehicle frame 2 connectable carrier 20 for connecting at least one trailing arm 11 is provided, this carrier 20 not only with a connection possibility 14 for a trailing arm 11 , but also with at least one connection possibility 15 for a vibration damper 12 and / or with at least one connection option 16 for a pneumatic bellows 13 or more bellows 13 is provided one behind the other.

The in the 2 and 3 drawn carriers 20 is both with at least one connection option 14 for a trailing arm 11 as well as with at least one connection possibility 15 for a vibration damper 12 as well as with at least one connection possibility 16 for a pneumatic bellows 13 provided, so there are three different functional groups integral to this carrier 20 halterbar. As a result, a compact, little space-consuming and complete with the aforementioned functional groups 11 . 12 . 13 assembled unit that is pre-assembled and ready to be delivered to a production line. The trailing arm 11 , Vibration damper 12 and bellows 13 can be fixed in their orientation, so that the actual axle assembly can also be performed by less qualified personnel and the error possibilities are low.

Otherwise, as drawn here, the carrier may 20 in vehicle transverse direction 8th is continuous, so not on each vehicle side a carrier 20 is to assemble, but a continuous support is to be mounted, for example, on both transverse sides of longitudinal members. Such a carrier can then via connection possibilities 14 . 15 . 16 for trailing arm 11 both sides of the vehicle and / or for vibration damper 12 both sides of the vehicle and / or for bellows 13 Both sides of the vehicle have.

Also, especially with a transversely continuous carrier, but also with two separate lateral supports 20 possible that this (r) additionally with a connection possibility for a lift device for up and down movement of the liftable axle 3 is or are provided. Such lifts can in the transverse center or laterally offset on the frame 2 or on the carrier 20 be supported.

The here drawn two lateral support 20 are each formed as an integral unit, so that they each have a one-piece structure. For example, such a carrier 20 when Casting be formed. Also an education as for example Blechschweißgruppe like in 3 is possible.

The in 3 Carrier drawn in detail 20 has at least one flange plate 17 for connection to a vehicle frame 2 and from there at least substantially horizontally outward vehicle-facing prop 18 for connection 15 . 16 an upper end of a vibration damper 12 and / or at least one air spring bellows 13 on. Here is an example of the support 18 formed as a substantially horizontal plate and has the two aforementioned connection possibilities 15 . 16 next to each other. The flange plate 17 For example, with side profiles of the vehicle frame 2 welded or bolted as here. For this purpose, a plurality of through holes is provided.

From the flange plate 17 also extends from there obliquely downward pointing cantilever 19 for connecting a trailing arm 11 , As in 1 can be seen, the cantilever runs 19 from the connection to the vehicle frame 2 with an inclination of 30 ° to 50 ° to the vertical obliquely downwards, in the direction of the other axis 5 , Here is the liftable axle 3 the further axis 5 downstream, the cantilever therefore runs with a component in the direction of travel 9 ,

The invention can be used regardless of whether the other axis 5 via bellows or, as shown in the drawing, leaf springs 21 suspension is what is very common outside of Europe. The chassis arrangement must be 10 not be changed, that is, the liftable axle 3 can be unchanged with its own air suspension 13 be provided, even if - as in 1 - the package of leaf springs 21 the axis 5 has a very considerable longitudinal extent.

This is made possible by the cantilever arm 19 of the carrier 20 one of the liftable axle 3 facing end region 22 the leaf springs 21 engages below. The leaf springs 21 can therefore with their end 22 very close to the liftable axle 3 lie without it comes to space problems. The leaf springs 21 underreaching area of the carrier 3 includes the connection possibilities 14 for the trailing arm 11 so that their substantially horizontal position below the vehicle frame also remains undisturbed and in a leaf-sprung or air-sprung further axis 5 in this respect always the same geometries of the functional groups 11 . 12 . 13 the liftable axle 3 be granted. It can always be the same suspension arrangement 10 be used. Space problems are avoided in any case.

With the invention, this results in a considerable simplification of the logistics, the design and a reduction in the number of parts. This results in a simple pre-assembly. Due to the universal applicability can also larger quantities of such suspension arrangement 10 be made without individual adjustments - regardless of whether the other axis 5 leaf or air suspension is.

LIST OF REFERENCE NUMBERS

1

Motor vehicle,

2

Vehicle frame,

3

Axis,

4

Bikes,

5

further axis,

6

front axle,

7

Cab,

8th

Vehicle transverse direction,

9

direction of travel,

10

Landing gear assembly,

11

Trailing arm,

12

vibration dampers,

13

 bellows,

14

Connection possibility for trailing arm,

15

Connectivity for vibration absorbers,

16

Connection possibility for air bellows or air bellows,

17

flange plate,

18

Support,

19

cantilever,

20

Carrier,

21

Leaf springs,

22

 end

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10040656 B4 [0002]

Claims (14)

Chassis arrangement ( 10 ) for commercial vehicles ( 1 ) (Commercial vehicles) and / or trailers with at least one liftable axle ( 3 ), that of another axis ( 5 ) is arranged upstream or downstream, wherein the liftable axle ( 3 ) at least substantially in the vehicle longitudinal direction oriented trailing arm ( 11 ) and at least substantially upstanding vibration dampers ( 12 ) and at least one with a vehicle frame ( 2 ) connectable carrier ( 20 ) for connecting at least one trailing arm ( 11 ), characterized in that the carrier ( 20 ) with at least one connection possibility ( 14 ) for a trailing arm ( 11 ) as well as with at least one connection possibility ( 15 ) for a vibration damper ( 12 ) is provided. Chassis arrangement ( 10 ) for commercial vehicles ( 1 ) (Commercial vehicles) and / or trailers with at least one liftable axle ( 3 ), that of another axis ( 5 ) is arranged upstream or downstream, wherein the liftable axle ( 3 ) at least substantially in the vehicle longitudinal direction oriented trailing arm ( 11 ) and at least substantially towering air bladders ( 13 ) are assigned to an air suspension and wherein at least one with a vehicle frame ( 2 ) connectable carrier ( 20 ) for connecting at least one trailing arm ( 11 ), characterized in that the carrier ( 20 ) with at least one connection possibility ( 14 ) for a trailing arm ( 11 ) as well as with at least one connection possibility ( 16 ) for at least one air bladder ( 13 ) is provided. Chassis arrangement ( 10 ) according to one of claims 1 or 2, characterized in that the carrier ( 20 ) with at least one connection possibility ( 14 ) for a trailing arm ( 11 ) as well as with at least one connection possibility ( 15 ) for a vibration damper ( 12 ) as well as with at least one connection possibility ( 16 ) for a pneumatic bellows ( 13 ) is provided. Chassis arrangement ( 10 ) according to one of claims 1 to 3, characterized in that the carrier ( 20 ) in the vehicle transverse direction ( 8th ) is extended throughout and about connection possibilities ( 14 ; 15 ; 16 ) for trailing arm ( 11 ) of both sides of the vehicle and / or for vibration dampers ( 12 ) of both sides of the vehicle and / or for bellows ( 13 ) on both sides of the vehicle. Chassis arrangement ( 10 ) according to one of claims 1 to 4, characterized in that the carrier ( 20 ) additionally with a connection possibility for a lift device for up and down movement of the liftable axle ( 3 ) is provided. Chassis arrangement ( 10 ) according to one of claims 1 to 5, characterized in that the carrier ( 20 ) is integrally formed as a cast or forged part. Chassis arrangement ( 10 ) according to one of claims 1 to 6, characterized in that the carrier ( 20 ) is designed as a sheet metal welding group. Chassis arrangement ( 10 ) according to one of claims 1 to 7, characterized in that the carrier ( 20 ) at least one flange plate ( 17 ) for connection to a vehicle frame ( 2 ) and one of the flange plate ( 17 ) of at least substantially horizontally outwardly pointing support ( 18 ) for connecting an upper end of a vibration damper ( 12 ) and / or at least one air spring bellows ( 13 ) having. Chassis arrangement ( 10 ) according to one of claims 1 to 8, characterized in that the carrier ( 20 ) at least one flange plate ( 17 ) for connection to a vehicle frame ( 2 ) and one of the flange plate ( 17 ) from obliquely downward pointing cantilever ( 19 ) for connecting a trailing arm ( 11 ) having. Chassis arrangement ( 10 ) according to one of claims 1 to 9, characterized in that the cantilever arm ( 19 ) of the connection to the vehicle frame ( 2 ) with an inclination of 30 ° to 50 ° to the vertical obliquely downwards in the direction of the further axis ( 5 ) runs. Chassis arrangement ( 10 ) according to one of claims 1 to 10, characterized in that the further axis ( 5 ) via bellows ( 13 ) is sprung. Chassis arrangement ( 10 ) according to one of claims 1 to 10, characterized in that the further axis ( 5 ) via leaf springs ( 21 ) is sprung. Chassis arrangement ( 10 ) according to claim 12, characterized in that the cantilever arm ( 19 ) an area ( 22 ) of the leaf springs ( 21 ). Carrier ( 20 ) of a liftable axle ( 3 ) with a connection possibility ( 14 ) for a trailing arm ( 11 ), characterized in that the carrier ( 20 ) in addition to the connection possibility ( 14 ) for the trailing arm ( 11 ) one or more further connection possibilities (s) ( 15 . 16 ) for a vibration damper ( 12 ) and / or an air bladder ( 13 ) according to one or more of claims 1 to 10.

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