WO2016041702A1

WO2016041702A1 - Chassis assembly for a vehicle, comprising at least one lift axle and a support for an axle of this type

Info

Publication number: WO2016041702A1
Application number: PCT/EP2015/068616
Authority: WO
Inventors: Eike Helm; Sören KNOPP
Original assignee: Zf Friedrichshafen Ag
Priority date: 2014-09-18
Filing date: 2015-08-13
Publication date: 2016-03-24
Also published as: DE102014218735A1

Abstract

The invention relates to a chassis assembly (10), in particular for utility vehicles (1) (NKW) and/or trailers, said assembly comprising at least one chassis lift axle (3), arranged to run in front of or behind another axle (5), trailing links (11) oriented at least substantially in the longitudinal directional of the vehicle being associated with the chassis lift axle (3). At least one support (20), which can be or is connected to a chassis frame (2) in order to connect at least one trailing link (11), is provided. Said chassis assembly is designed such that the support (20) has at least one boom or bracket arm (19), pointing obliquely downward from its connection to the vehicle frame (2), for connecting a trailing link (11).

Description

Fahrwerksanordnunq for a vehicle with at least one liftable axle and

Carrier of such an axis

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 axle, wherein the liftable suspension axle at least in

Essentially oriented in the vehicle longitudinal direction trailing arm are assigned, 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 vehicle axles on commercial 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

Construction is known for example from DE 100 40 656 B4. 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 ones possess

Lifting axle constructions have the disadvantage that they can only be used in conjunction with an air-suspended adjacent axle. In the case of a leaf suspension axle, which is still standard, especially outside Europe is owned by the far forward and backward reaching leaf springs an additional tightening space restriction, so that the common types can not be used there or only with elaborate separate special parts.

The invention is based on the problem, a suspension arrangement for a

To provide vehicle of the type mentioned, in which the space problem is mitigated and allows a high degree of flexibility of a neighboring axis.

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 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 by the fact that a connectable to the vehicle frame or connected and suitable for connecting at least one trailing arm carrier at least one of its connection to the vehicle frame obliquely downward pointing boom or cantilever for connecting a trailing arm has, this connection is spatially optimized. The carrier is an inherently rigid structure which is suitable for the transmission of forces which, via the at least one

Connectivity can be initiated in these. The carrier has a design inherent rigidity, the same deformation under

Load effect largely prevented. By a cantilever or cantilever is meant herein an elongate extending portion of the carrier. The longitudinally extending portion, at the end of the trailing arm is connected, is mainly claimed on bending. The terms boom and cantilever represent alternative names for the same item. Under a trailing arm is in the context of the present invention a

Two-point link, also called pendulum support, to understand which in

Installation state is oriented substantially in the vehicle longitudinal direction. Trailing arms take over the longitudinal guidance of the axle. Preferably, the carrier is designed such that its obliquely downwardly pointing boom or cantilever in the installed position downwards away from the chassis axle.

In particular, the boom or cantilever from the connection to

Vehicle frame with an inclination of 20 ° to 50 ° against the vertical obliquely downwards and thus over a small longitudinal path bridge a large height difference, so that on the one hand, the connection possibility for the trailing arm close to the liftable axis and yet an at least almost horizontal position this Trailing arm below the plane of the vehicle frame is made possible. In the case of a very steep course of the cantilever arm, the connection possibility of the trailing arm formed with respect to the direction of travel is particularly close to the liftable axle.

The trailing arm is unquestionably predefined in its position and orientation in any case by the cantilever with the possibility of attachment given thereto and can in particular always occupy the same position, regardless of whether the other axis is air-sprung or leaf-sprung. It must therefore be for the

different types of suspension of the other axis in the carrier of the liftable axle not two different types are kept, but the carrier may be formed similar in both cases.

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.

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 casting or as a forged part. Even a prefabricated sheet metal welding group is understood in this sense as one piece. As a sheet metal welding group is an embodiment of the carrier as a welded construction to be understood in the individual components of the carrier, such as sheet metal blanks, are connected by welding to a one-piece carrier. It is favorable if the carrier has at least one flange plate for connection to a vehicle frame, from which the cantilever arm can point downwards. The flange plate may be welded, riveted or bolted to the vehicle frame.

The cantilever can in alignment with the flange plate in a vertical

Vehicle longitudinal plane lie and form, for example, substantially with this a common planar sheet. Reinforcing structures, which then

For example, in the vehicle transverse direction, may be provided for stiffening, so that there is a high stability against deformation.

Particularly advantageously, the carrier which can be connected to the vehicle frame is not only provided for connecting at least one trailing arm, but additionally provided with at least one connection possibility for a vibration damper and / or with at least one connection possibility for at least one air bellows.

This results in a high degree of prefabrication while reducing the number of parts, also the assembly is facilitated. By a vibration damper is meant a system for damping mechanical vibrations (vibrations, shocks) which are introduced during the driving operation via the roadway into the wheels and then into 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 during compression and rebound of the axle is a counterforce to the over road bumps in the wheels

forms initiated forces. The carrier can then be supplied preassembled with the trailing arm and the vibration damper and / or the at least one air bellows as a carrier unit to the assembly line and there, for example, with the

Bolted frame, which in prefabricated holes a high

Process reliability offers. Misassembly or alignment of the other parts connected to the carrier is avoided. By the example, like a block In addition, the number of required parts is low, trained carriers with multiple connectivity 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 as well as with at least one connection possibility for at least one air bellows. Then three functional group connections are 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 unambiguous orientation and positioning of the connections, even in the case of a subsequent installation of the said parts, is very high

Process security and simplification created.

An embodiment provides that the carrier is continuously extending in the vehicle transverse direction and about connection possibilities for trailing arm both

Vehicle sides and / or vibration damper both sides of the vehicle and / or air bellows both sides of the vehicle has. 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 additionally with a

Connection possibility for a lift device for up and down movement of the liftable axle is provided. As a result, a special assembly simplification is then also created with respect to this unit.

A carrier of a liftable chassis axle with a connection possibility for a trailing arm, which carrier over a portion of the same with a

Vehicle frame is connectable and which carrier is characterized in that it at least one of the sub-area with respect to its mounting position in the Has suspension axis obliquely downwardly facing boom or cantilever for connecting a trailing arm according to one or more of claims 1 to 13, is claimed separately. The aforementioned portion of the carrier provides in the assembled state, the contact surface to the vehicle frame. Due to the inclination of the jib or cantilever, the bending stress acting on the carrier during driving operation by the trailing arm is reduced compared to a carrier of the same cross-section arranged perpendicularly.

Further advantages and features of the invention will become apparent from the illustrated in the drawings and described below embodiments of the

Subject of the invention.

In the drawing shows:

1 is 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,

Fig. 2 shows the liftable axle of Figure 1 with it mounted

Functional units in perspective,

Fig. 3 is a perspective view obliquely from below of a block-like

constructed carrier with an obliquely downward cantilever arm for connecting a trailing arm and with additional connection possibilities for a vibration damper and an air bellows.

A motor vehicle 1 equipped with one or more chassis arrangements 10 according to the invention forms a commercial vehicle (commercial vehicle) such as a motor vehicle

Lorries or even a trailer or semi-trailer (trailer).

The commercial vehicle 1 illustrated in FIG. 1 comprises a vehicle frame 2, which here comprises lateral side members and a plurality of cross members connecting them. In the Side view of Figure 1, only the side members can be seen. These may have a variety of holes for Anmontage parts of a chassis assembly 10 via fittings. Welding, riveting or another connection between the vehicle frame 2 and chassis assembly 10 is possible.

On the vehicle frame 2, one or more chassis assemblies 10 each having one or more liftable and each wheel 4 supporting axle (s) 3 are arranged. The liftable axle (s) 3 is or are each oriented transversely to the direction of travel 9. In the case of several such liftable axles 3, it is also possible for the chassis assembly 10 according to the invention to be provided only on a part of these axles, 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 FIG. 1, exactly one liftable axle 3 is provided. This is a further - driven here - 5 axis forward or trailing arranged and can at high load or other high demands in a functional position in which the vehicle transverse direction 8 outboard wheels 4 have road contact, be moved down. In an upwardly displaced rest position of the liftable axle 3 whose wheels 4 have no road contact. The displacement is essentially vertical, but may also include an angle to the vertical. In addition to the aforementioned axles 3, 4, further axles, such as a front axle 6 below a driver's cab 7, can be provided on the vehicle 1.

As a means for guiding and inhibiting unwanted movements of the liftable chassis axle 3 are at least substantially oriented in the vehicle longitudinal direction trailing arm 1 1 and at least substantially towering

Vibration damper 12 (often referred to as shock absorbers) provided, wherein the trailing arm 1 1 also a significant angle to the horizontal and the vibration damper 12 also a significant angle to the vertical can have. A longitudinal and transverse guidance of the axis 3 via, for example, wishbone, as shown in Figure 2, is possible.

Furthermore, at least one carrier 20 which can be connected or connected to the vehicle frame 2 is connected to connect at least one trailing arm 11

intended. From the connection of the carrier 20 to the vehicle frame 2 - screwed here via an upright and with longitudinal profiles of the frame 2

Flange plate 17 - extends an obliquely downwardly facing cantilever 19 for connecting a trailing arm 1 1. As can be seen in Figure 1, the cantilever 19 extends from the connection to the vehicle frame 2 with an inclination of 20 ° to 50 ° against the vertical obliquely down, in the direction of the further axis 5. Here is the liftable axle 3 of downstream of the further axis 5, the cantilever therefore runs with a component in the direction of travel 9. The cantilever 19 is often relatively steep, so that it provided in the lower area

Connection possibility 14 for the trailing arm 1 1 is close to the axis 3 and thus only very little space in the direction of travel 9 is needed. Here, the connection possibility includes two extending in the vehicle longitudinal direction sleeves into which a receptacle for the trailing arm is screwed.

With the space optimization achieved, the invention can be used regardless of whether the other axis 5 is supported by air spring bellows or leaf springs 21 as in the drawing, which is particularly common outside of Europe. In this case, the chassis assembly 10 does not have to be changed depending on the type of suspension, that is, the liftable axle 3 can be provided unchanged with their own air suspension 13, even if - as in Figure 1 - the package

Leaf springs 21 of the axis 5 has a very considerable longitudinal extent.

This is made possible by the fact that the cantilever arm 19 of the carrier 20 engages under an end region 22 of the leaf springs 21 facing the liftable axle 3. The leaf springs 21 can therefore lie with their end portion 22 very close to the liftable axis 3, without causing space problems. Of the

Overlap area can be with respect to the vehicle longitudinal direction a few centimeters to more than 20 centimeters. The connection 14 for the Trailing arm 1 1 can be significantly below the leaf springs 21, so that their spring travel is not limited. For the connection possibilities 14 of the trailing arm 1 1 can therefore always be present in a leaf-sprung or air-sprung further axis 5 so far the same geometries. This also applies to the further functional groups 12, 13 of the liftable axle 3 explained in greater detail below, which can be supported on the carrier 20. It can always be the same

Chassis assembly 10 can be used. Space problems are avoided in any case.

The support 20, which is shown by way of example in detail in FIG. 3, has at least one flange plate 17 for connection to a vehicle frame 2 and a support 18 pointing at least substantially horizontally outwards therefrom

Connection 15, 1 6 of an upper end of a vibration damper 12 and / or at least one Luftfederbalgs 13. Here, by way of example, the support 18 is formed as a substantially horizontal plate and has the two mentioned

Connections 15, 1 6 next to each other. The flange plate 17 can be screwed, for example, with lateral profiles of the vehicle frame 2. For this purpose, a plurality of through holes is provided. The cantilever 19 is substantially aligned with the flange plate 1 7, thus also includes a substantially upright portion, which may be reinforced and stiffened, but overall in the vehicle transverse direction 9 has only a small extension and close to the side rails 1 1 of the frame. 2 lies.

The two lateral supports 20 drawn here are each designed as an integral constructional unit, so that they each have a one-piece construction.

For example, such a carrier 20 may be formed as a casting or as a forged part. A training as example sheet metal welding group as in Figure 3 is possible.

The carrier 20 is according to the drawing not only with a connection possibility 14 for a trailing arm 1 1, but also with at least one connection possibility 15 for a vibration damper 12 and / or at least one Connection possibility 1 6 for a pneumatic bellows 13 or more bellows 13 provided in a row.

The carrier 20 shown in FIGS. 2 and 3 integrally comprises all these connection possibilities for three functional groups, ie it is provided with at least one connection option 14 for a trailing arm 11 and at least one connection possibility 15 for a vibration damper 12 as well as with at least one connection possibility 1 6 provided for an air bladder 13. As a result, a compact, little space-occupying and fully equipped with the aforementioned functional groups 1 1, 12, 13 unit is formed, which is far pre-assembled and can be delivered to a production line equipped. The trailing arm 1 1, 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 20 can alternatively also in

Vehicle transverse direction 8 is continuously extending, so that is not to be mounted on each vehicle transverse side, a carrier 20, 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, 1 6 for trailing arm 1 1 both sides of the vehicle and / or for vibration damper 12 both

Vehicle sides and / or air bellows 13 both sides of the vehicle have.

It is also possible, in particular in the case of a transversely continuous support, but also in the case of two separate lateral supports 20, that this is additionally provided with a connection possibility for a lifting device for raising and lowering the liftable axle 3. Such lifting devices can be supported in the transverse center or offset laterally on the frame 2 or on the carrier 20.

With the invention, this results in a considerable simplification of the logistics, the design and a reduction in the number of parts. By the universal

Usability can also larger quantities of such Chassis assembly 10 are made without individual adjustments - regardless of whether the other axis 5 leaf or air suspension.

License plate motor vehicle,

Vehicle frame,

Axis,

Bikes,

further axis,

front axle,

Cab,

Vehicle transverse direction,

direction of travel,

Landing gear assembly,

Trailing arm,

vibration dampers,

bellows,

Connection possibility for trailing arm,

Connection possibility for vibration damper, connection possibility for air bellows or air bellows, sub-area, flange plate,

Support,

Cantilever or cantilever,

Carrier,

Leaf springs,

end

Claims

claims

1 . Chassis arrangement (10) 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 Vehicle longitudinally oriented trailing arm (1 1) are assigned and wherein at least one with a vehicle frame (2) connectable or connected carrier (20) for connecting at least one trailing arm (1 1) is provided, characterized in that the carrier (20) at least one of its connection to the vehicle frame (2) from obliquely downwardly pointing boom or cantilever (19) for connecting a trailing arm (1 1).

2. landing gear assembly (10) according to claim 1, characterized in that the boom or cantilever arm (19) from the connection to the vehicle frame (2) with an inclination of 20 ° to 50 ° against the vertical extends obliquely downwards.

3. landing gear assembly (10) according to any one of claims 1 or 2, characterized in that the boom or cantilever arm (19) extends with a component in the direction of the further axis (5).

4. landing gear assembly (10) according to any one of claims 1 to 3, characterized in that the further axis (5) via spring bellows (13) is sprung.

5. chassis arrangement (10) according to one of claims 1 to 3, characterized in that the further axis (5) is spring-loaded by leaf springs (21).

6. landing gear assembly (10) according to claim 5, characterized in that the cantilever arm (19) engages under an area (22) of the leaf springs (21).

7. landing gear assembly (10) according to one of claims 1 to 6, characterized in that the carrier (20) via at least one flange plate (17) with the vehicle frame (2) is connected.

8. landing gear assembly (10) according to one of claims 1 to 7, characterized in that the carrier (20) is integrally formed as a casting or as a forged part.

9. landing gear assembly (10) according to one of claims 1 to 7, characterized in that the carrier (20) is designed as a sheet metal welding group.

10. landing gear assembly (10) according to any one of claims 7 to 9, characterized in that the cantilever arm (19) extends in alignment with the flange plate (17) obliquely downwards.

1 1. Chassis assembly (10) according to one of claims 1 to 10, characterized in that the carrier (20) both with at least one

Connection possibility (14) for a trailing arm (1 1) as well as with at least one connection possibility (15) for a vibration damper (12) and / or with at least one connection possibility (1 6) for at least one air bellows (13) is provided.

12. chassis arrangement (10) according to one of claims 1 to 12, characterized in that the carrier (20) in the vehicle transverse direction (8) extends continuously and via connection possibilities (14; 15; 1 6) for trailing arm (1 1) both sides of the vehicle and / or for vibration damper (12) both

Vehicle sides and / or for air bellows (13) of both sides of the vehicle features.

13 landing gear assembly (10) according to one of claims 1 to 13, characterized in that the carrier (20) is additionally provided with a connection possibility for a lifting device for up and down movement of the liftable axle (3).

14. carrier (20) of a liftable chassis axle (3) with a

Connection possibility (14) for a trailing arm (1 1), which carrier (20) can be connected to a vehicle frame (2) via a partial area (17), characterized in that the carrier (20) comprises at least one of the partial area (17). with respect to its mounting position in the chassis axle (3) obliquely downwards pointing jib or cantilever arm (19) for connecting a trailing arm according to one or more of claims 1 to 13.