WO2015197279A1

WO2015197279A1 - Suspension arm made of fiber composite

Info

Publication number: WO2015197279A1
Application number: PCT/EP2015/061491
Authority: WO
Inventors: Ingolf Müller; Jens Heimann; Manfred Bürgmann; Friedhelm Langhorst; Daniel Wolf; Daniel Segler; Günther Erdl; Günther DRESSLER; Christopher Werner; Uwe ROTTER
Original assignee: Zf Friedrichshafen Ag
Priority date: 2014-06-26
Filing date: 2015-05-26
Publication date: 2015-12-30
Also published as: DE102014212368A1

Abstract

The invention relates to a component (102) of a wheel suspension, comprising at least one torsional element (104) and at least one supporting element (106, 108); the torsional element (104) includes at least one receptacle (110, 112) which at least partly encloses the supporting element (106, 108); pivoting of the supporting element (106, 108) causes torsion of the torsional element (104). At least one thread (302, 304) secures the supporting element (106, 108) in the receptacle (110, 112).

Description

Suspension link made of fiber composite material

The invention relates to a component of a wheel suspension according to the preamble of claim 1.

Such, executed as a four-point link components are used in commercial vehicles to perform a rigid axle federbarse in a vehicle frame. The four-point link is responsible for the transverse guidance and the longitudinal guidance of the axle. Furthermore, the four-point link fulfills the function of a stabilizer.

From the document EP 1 787 833 A1 is a four-point link with a

Torsion element and two carrier elements known. The support elements extend in the vehicle longitudinal direction and each have two mounting sockets. In each case a fastening bushing of a carrier element is mounted in the vehicle frame. The rigid axle is fixed in the other socket.

The torsion element arranged in the vehicle transverse direction connects the two carrier elements to one another. For this purpose, the torsion element on two continuous recesses, each enclosing a support member. A pivoting of the carrier elements against each other therefore leads to a twist of the

Torsion.

The carrier elements and the torsion element are made of sheet metal or cast and are welded together. This is associated with weight penalties.

A four-point link in FKV construction is from the document

DE 10 201 1 079 654 A1. This four-point link is executed in Integralbeziehungsweise shell construction. This makes the four-point handlebar very easy, but is in terms of a manufacturing design and a

large-scale production of disadvantage.

The invention is based on the object, a component of a suspension, bypassing the known from the prior art solutions to realize inherent disadvantages. In particular, a low mass is to be achieved while ensuring manufacturability.

This object is achieved by a component of a wheel suspension according to claim 1.

Under a suspension is a device to understand the wheels of a vehicle steerable and / or federbar with a body and / or a

Frame of the vehicle coupled. The vehicle may be a

Motor vehicle, in particular a commercial vehicle, but also a

People motor vehicle act.

A component refers to a device that is in a parent

Device - here a suspension - can be installed.

The component according to the invention has at least one torsion element and at least one carrier element. The carrier element is an element which is designed to receive loads, in particular for receiving loads which are introduced by a vehicle ash or a wheel carrier. The carrier element is preferably formed, the vehicle axle or the

Coupling wheel carrier with a frame and / or a body of the vehicle. For this purpose, a first end of the support member is pivotally connected to the vehicle axle or the wheel carrier, while a second end is pivotally connected to the body or the frame of the vehicle. Articulated here denotes a rotatability about at least one axis.

The torsion element serves the carrier element with respect to a

Stabilize pivoting. For this purpose, the torsion element has at least one receptacle which at least partially, preferably, the carrier element

completely, encloses. The receptacle is thus a region of the torsion element which produces an at least positive, preferably positive and non-positive connection to the carrier element. This is the result

Carrier element relative to the torsion preferably at least relative fixed to a mutual rotation about a torsion axis. Furthermore, a receptacle is preferred, which is designed such that the carrier element can be inserted into the receptacle.

The carrier element and the torsion element are arranged so that a

Pivoting of the carrier element, that is, a rotation of the carrier element about the torsion axis, with a torsion, that is, a rotation of the

Torsionselements goes along. The torsion comes as a result of a

Torsionsmoments which exerts the support element during pivoting on the torsion element.

According to the invention, the component has at least one thread, too

Fiber bundles or roving called, on. Under a thread is to understand a piece of a yarn. The term yarn in turn is defined in the standard DIN 60900.

The thread is wound so that it fixes the support element in the receptacle. The can be achieved in an advantageous manner by the torsion element and the support element are at least partially wrapped with the thread. In particular, a wrapping of the recording with the thread is preferred. As a thread, multifilament yarn is preferably used.

The component according to the invention makes it possible to use a torsion element consisting of a fiber composite material and / or a carrier element consisting of a fiber composite material. However, such components made of fiber composites can usually be difficult to manufacture suitable for mass production and cost. This problem can be solved by using the component according to the invention. Thus, the component can be produced very simply by means of the following steps of a method according to the invention:

Producing the carrier element;

Producing the torsion element;

Inserting the carrier element into the receptacle; and Fixing the carrier element with the thread, preferably by wrapping the carrier element and the torsion element, in particular in the region of the receptacle, with the thread.

The carrier element and the torsion element are thus produced individually. Both elements can have a tubular or rod-shaped geometry and can therefore be easily manufactured in fiber composite construction. The thread is used

excluding the fixation of the carrier element in the recording, but not the formation of a component geometry. Therefore, the fixation with the thread manufacturing technology can be particularly easy to implement.

The individual process steps are preferably carried out in the order given. If the technical conditions allow it, but also deviating sequences of execution are possible.

In a preferred embodiment of the component, the thread is stretched, that is acted upon by a force which causes a tension of the thread.

As a result, the thread is frictionally connected to the carrier element and the

Torsionselement connected.

The thread preferably runs such that a pivoting of the

Support member induced by the adhesion of the thread to the support member acting on the thread force, which in turn is transmitted via the frictional connection between the thread and the torsion on the torsion. The induced force causes an increase in the tension of the thread.

A compound of the carrier element with the torsion element with a

Tensioned thread is particularly suitable for the material.

In a preferred embodiment, the thread is by means of an adjuvant

positive and / or cohesive with the support element and / or the

Torsionselement connected. The adjuvant may be an adhesive or a matrix of a fiber composite. Basically, there is the Possibility to first wrap the torsion element and the carrier element with the thread and then apply the excipient, or first apply the excipient before the torsion element and the carrier element are wrapped with the thread.

Preferably, the component is further developed in such a way that the

Torsion element has a continuous recess which forms the receptacle. In this recess, the support element can be inserted. The support member is then arranged to pass through the recess. A recess in the torsion element offers the advantage of a simple production. In addition, a secure fixation of the support element is ensured in the recording.

In a further preferred embodiment, the torsion element and / or the carrier element at least partially, preferably completely, made of a fiber composite material. This can be considerable

Achieve weight savings. The fiber composite material may in particular be FKV (fiber-reinforced plastic composite).

Preferably, at least the torsion element is further developed such that it consists at least partially, preferably completely, of a fiber composite material which is woven, wound or braided from exactly one thread or one thread group. The thread or thread group is woven, wound or braided so that it also fixes the carrier element in the receptacle. A thread group is to be understood as meaning a plurality of threads that form a bundle

are summarized. This bundle again represents a thread.

The production of such a further developed component designed such that initially the already prefabricated support member is provided to then weave from the thread, the torsion element. Among other things, the thread is guided around the carrier element. This creates the receptacle for fixation and power transmission. In a preferred embodiment, the component has exactly two mutually different of the carrier elements described above. Accordingly, the torsion element is provided with a first receptacle and a second receptacle different from the first receptacle, the first receptacle at least partially enclosing a first of the two support elements and the second receptacle

Recording a second of the two support elements at least partially encloses. The torsion element then extends between the first receptacle and the second receptacle and connects the first carrier element with the second carrier element. A torsion of the torsion element occurs as a result of a pivoting of the first carrier element and of the second carrier element relative to one another. The torsion axis, which is identical to an axis of rotation about which the pivoting of the first carrier element and of the second carrier element takes place, extends through the first receptacle and the second receptacle.

The thread described above fixes the first carrier element in the first

Recording and / or the second carrier element in the second recording.

In particular, this thread can fix only the first carrier element in the first receptacle. For fixing the second carrier element in the second receptacle, a second, similarly designed thread is then provided.

Alternatively, it is possible by means of a single thread both the first

Support member in the first receptacle and the second support member in the second receptacle to fix. This thread may in particular be developed so that it forms the fiber composite material from which the torsion element consists at least partially.

In a particularly preferred development, the component is as

Four-point handlebar designed. In particular, an embodiment of the component such that the component can be used instead of a conventional four-point link of a commercial vehicle is possible.

The four-point link is preferably developed so that the first

Carrier element and the second carrier element in each case in a first end articulated to a frame or a body of a vehicle, in particular one Utility vehicle, can be connected. In a second end, respectively, the first carrier element and the second carrier element can each be hinged to a rigid axle of the vehicle.

Accordingly, the first carrier element preferably has a first joint bushing and a second joint bushing, and the second carrier element has a third one

Joint socket and a fourth joint socket on. The first joint bushing and the third joint bushing can be articulated in a frame of the utility vehicle. Accordingly, the second joint socket and the fourth

Joint socket to be hingedly connected to an axle of the utility vehicle.

Alternatively, the component may be designed as a torsion beam axle. In this case, the first carrier element and the second carrier element each form one

Trailing arm. The torsion element performs the function of a torsion element which is customary in torsion beam axes.

Embodiments of the invention are illustrated in the figures. there

Identical reference symbols designate identical or functionally identical features. In detail shows

Fig. 1 torsion and bending beam of a four-point link;

2 shows a four-point link with open receptacles.

3 shows a four-point link with Fixierwicklungen.

Fig. 4 shows a four-point link with a torsion bar, the Fixierwicklungen

forms; and

Fig. 5 Fixierwicklungen.

In the four-point link 102 shown in Fig. 1, a torsion beam 104 act as a torsion element and a first bending beam 106 and a second

Bending beam 108 as support elements.

The torsion beam 104 has a first recess 1 10 and a second

Recess 1 12 on. In the first recess 1 10 is the first bending beam 106th plugged in. The second bending beam 108 is inserted into the second recess 1 12.

The first bending beam 106 and the second bending beam 108 can each be provided in a first end 1 14, 1 16 with a bearing eye. By means of this

Bearing eyes are the first bending beam 106 and the second bending beam 108 each stored in its first end 1 14, 1 16 in a vehicle frame.

Likewise, the first bending beam 106 and the second bending beam 108 can be provided in their second ends 1 18, 120 each with a bearing eye. These bearing eyes serve to connect the four-point link 102 with an axle.

A similar four-point link 102 is shown in FIG. Here, in contrast to Fig. 1, the first recess 1 10 and the second recess 1 12 but not as continuous recesses in the first bending beam 106 and the second

Bending beam 108 executed. The first recess 1 10 and the second

Recess 1 12 are instead open to the outside. The recesses 1 10, 1 12 shown in FIG. 2 on the one hand improve the support of the

Torsion carrier 104 on the bending beams 106, 108, but on the other hand

more difficult to manufacture.

Fig. 3 illustrates how the components of the four-point link 102 are fixed. A first, consisting of a first thread winding 302 is in the region of the first recess 1 10 to the first bending beam 106 and the

Torsion Träger 104 led around. Accordingly, a second, existing from a second thread winding 304 in the region of the second recess 1 12 is guided around the second bending beam 108 and the Torsionsträger 104.

The first winding 302 and the second winding 304 fulfill a plurality of functions. Thus, the windings 302, 304 prevent the torsion beam 104 from slipping along the bending beams 106, 108. Furthermore, the windings 302, 304 are able to transmit torsional moments between the bending beams 106, 108 and the torsion beam 104. According to Fig. 3, the first winding 302, the second winding 304 and the

Torsion support 104 formed in three pieces, that is, the first winding 302, the second winding 304 and the Torsionsträger 104 each form one of three separate pieces. Further pieces form the first bending beam 106 and the second bending beam 108. The first bending beam 106, the second bending beam 108, the

Torsionsträger 104, the first winding 302 and the second winding 304 are thus carried out a total of five pieces.

In contrast, Fig. 4 shows a total of only three-piece embodiment of the four-point link 102. Here, the first winding 302, the second winding 304 and the Torsionsträger 104 are made in one piece. The torsion beam 104 is woven from a single thread, which also forms the first winding 302 and the second winding 304. The first winding 302 also extends around the first bending beam 106, the second winding 304 extends around the second bending beam 108 in a corresponding manner.

The configuration of the first winding 302 and the second winding 304 is illustrated in FIG. 5.

REFERENCE CHARACTERS

102 four-point handlebar

104 torsion beam

106 first bending beam

108 second bending beam

1 10 first recess

1 12 second recess

1 14 first end of the first bending beam

1 16 first end of the second bending beam

1 18 second end of the first bending beam

120 second end of the second bending beam

302 winding from a first thread

304 winding from a second thread

Claims

claims

1 . Component (102) of a suspension;

with at least one torsion element (104) and at least one carrier element (106, 108); in which

the torsion element (104) has at least one receptacle (1 10, 1 12) which at least partially surrounds the carrier element (106, 108); and where

a pivoting of the carrier element (106, 108) with a twist of the

Torsionselements (104) goes along; marked by

at least one thread (302, 304); in which

the thread (302, 304) fixes the carrier element (106, 108) in the receptacle (1 10, 1 12).

2. Component (102) according to the preceding claim, characterized

marked that

the thread (302, 304) is tensioned so that the thread (302, 304) is non-positively connected to the carrier element (106, 108) and the torsion element (104).

3. component (102) according to any one of the preceding claims, characterized in that

the thread (302, 304) is positively and / or materially connected to the carrier element (106, 108) and / or the torsion element (104) by means of an auxiliary substance.

4 component (102) according to any one of the preceding claims, characterized in that

a continuous recess (1 10, 1 12) of the torsion element (104)

Recording forms; in which

the carrier element (106, 108) passes through the recess (1 10, 1 12).

5. component (102) according to any one of the preceding claims, characterized in that

the torsion element (104) and / or the carrier element (106, 108) at least partially consists of a fiber composite material.

6. component (102) to the preceding claim, characterized in that

at least the torsion element at least partially from one

Fiber composite material which is woven, wound or braided from exactly one thread (302, 304); in which

this thread (302, 304) fixes the carrier element (106, 108) in the receptacle (1 10, 1 12).

7. component (102) according to any one of the preceding claims, characterized by

a first support member (106) and a second support member (108); wherein the torsion element (104) has a first receptacle (1 10) and a second receptacle (1 12); in which

the first receptacle (110) at least partially surrounds the first carrier element (106); in which

the second receptacle (1 12) at least partially surrounds the second carrier element (108); in which

a pivoting of the first carrier element (106) and the second

Carrier element (108) relative to each other with a torsion of the torsion element (104) is accompanied; and where

the thread (302, 304) fixes the first carrier element (106) in the first receptacle (110) and / or the second carrier element (108) in the second receptacle (112).

8. component (102) according to the preceding claim, characterized

marked that

the component (102) is designed as a four-point link.

9. component (102) according to the preceding claim, characterized

marked that

the first support member (106) and the second support member (108) each in a first end (1 14, 1 16) can be hingedly connected to a frame or a body of a vehicle; in which the first carrier element (106) and the second carrier element (108) each in a second end (1 18, 120) can be hingedly connected to a rigid axle.

10. component (102) according to claim 7, characterized in that

the component (102) is designed as a torsion beam axle.

1 1. Method for producing a component (102) according to one of

previous claims with the steps

- producing the carrier element (106, 108);

- producing the torsion element (104);

- Inserting the carrier element (106, 108) in the receptacle (1 10, 1 12); and

- Fixing the carrier element (106, 108) with the thread (302, 304) in the receptacle (1 10, 1 12).