EP3661771A1

EP3661771A1 - Three-point suspension link and production method for a three-point suspension link

Info

Publication number: EP3661771A1
Application number: EP18743734.8A
Authority: EP
Inventors: Andre Stieglitz; Ingolf Müller; Philipp Bauer
Original assignee: ZF Friedrichshafen AG
Current assignee: ZF Friedrichshafen AG
Priority date: 2017-08-04
Filing date: 2018-07-16
Publication date: 2020-06-10
Also published as: RU2020108299A3; US20200369105A1; CN110997358B; CN110997358A; WO2019025165A1; RU2766127C2; RU2020108299A; US11485184B2; DE102017213564A1

Abstract

The invention relates to a three-point suspension link (1) for a chassis of a vehicle comprising two arms (2) and a central bearing region (3). Each arm (2) has a bearing region (4). The three-point suspension link (1) comprises two load input elements (5), a central load input element (6), a stabilising layer (7), a core element (8) and a support winding (9). The stabilising layer (7) and the support winding (9) are formed of a fibre-plastic composite material. A load input element (5) is arranged on each bearing region (4). The central load input element (6) is arranged on the central bearing region (3). The core element (8) is surrounded by the stabilising layer (7) in a sub-region. The support winding (9) surrounds the load input elements (5), the central load input element (6), the stabilising layer (7) and the core element (8) in a sub-region.

Description

Three-point link and manufacturing method for a three-point link

The present invention relates to a three-point link with the above-conceptual features of claim 1 and a manufacturing method for a three-point link with the above-conceptual features according to claim 13.

Three-point links are used in commercial vehicles in tractor-trailer tractors in order to tie the axle to the structural frame. These contribute significantly to the transverse guidance and longitudinal guidance of the axle. A three-point link guides the axle in an upper link level and influences the driving characteristics of the truck. Each three-point link is during a driving operation of the truck high longitudinal loads and high transverse loads, as well as rolling movements, the z. B. during cornering of the commercial vehicle, exposed. This makes special demands on the rigidity of the same.

From DE102014214827A1 a multipoint link is known, which is essentially formed from a fiber-plastic composite structure. The fiber-plastic composite structure is integral and cohesively formed without a reinforcing structure.

The present invention is based on the prior art based on the object to propose an improved three-point link. This should be suitable for lightweight construction and thus have a low mass.

The present invention proposes starting from the aforementioned object, a three-point link with the features of claim 1 and a manufacturing method for a three-point link with the features of claim 13 before. Further advantageous embodiments and developments will become apparent from the dependent claims.

A three-point link for a chassis of a vehicle has two arms and a central storage area. Each arm has a storage area. The three-point link comprises two load-transfer elements, a central key-in element, a stabilizer situation, a core element and a supporting winding. The stabilization layer and the support winding are formed from a fiber-reinforced plastic composite material (FRP). At each storage area a Lasteinleitelement is arranged. The central key introduction element is arranged at the central storage area. The core element is enclosed by the stabilization layer in a partial area. The supporting winding encloses the load-introducing elements, the central-load-discharging element, the stabilizing layer and the core element in one subarea. The vehicle is preferably a commercial vehicle but may alternatively be a car.

The two Lasteinleitelemente are uniformly shaped to each other. The Zentrallasteinleitelement may be formed of the same material as the two load-introducing elements. Of course, the Zentrallasteinleitelement may be formed of a different material than the two load-introducing elements.

Each load-introducing element has a bearing receptacle which is suitable for receiving a bearing. These bearing receptacles preferably have a circular cross-section. The bearing may be, for example, a rubber-metal bearing. If the three-point link used in a chassis of a vehicle, these bearings are used to the three-point link on a vehicle body, for. B. on a frame structure support. The bearing mounts of the two load-transfer elements each have a bearing axis which lie in the same plane. This plane is perpendicular to a median plane of the three-point link.

The three-point link is preferably formed symmetrically to the median plane. Each load-introducing element is arranged on one arm of the three-point link and limits it to a side opposite the central storage area. A first load introduction element is arranged on a first arm of the three-point link at its storage area. A second load transfer element is arranged on a second arm of the three-point link at its storage area. In a driving operation act on these bearings, which are operatively connected to the respective Lasteinleitelementen loads. These are on the recordings of Lasteinleitelemente to the

Load initiation elements forwarded. These loads are forwarded from the load-transfer elements to the stabilization layer and to the support winding. The Zentralallasteinleitelement has a bearing receptacle, which is adapted to receive a bearing. The bearing may be, for example, a rubber-metal bearing. If the three-point link is used in a chassis of a vehicle, this bearing serves to connect the three-point link with an axle assembly. The bearing receptacle of Zentrallasteinleitelements is preferably cylindrical. The bearing receptacle of Zentrallasteinleitelements preferably has a bearing axis, which lies in the same plane in which are also the bearing axes of the two Lasteinleitelemente. The bearing, which is connected to the Zentralaltasteinleitelement act during a driving loads when the three-point link is used in a vehicle. These loads are absorbed by this bearing and forwarded to the Zentrallasteinleitelement, which in turn initiates the loads in the stabilization position and in the supporting winding.

The geometric basic shape of the three-point link is created by means of the core element. The core element thus has two arms and a central storage area. The core element is designed such that it has a lateral surface and two cover surfaces. More specifically, the lateral surface of the core element has two sections, wherein a first section of the lateral surface is arranged in the inner region of the two arms and wherein a second section of the lateral surface is arranged in the outer region of the two arms.

The core element is produced during the manufacturing process by means of a core structure. The core structure may be detachable or, alternatively, permanently formed, so that the core element is either material-free or formed from the same material as the core structure. If the core element is made free of material, the three-point link is designed as a hollow structure. If the core element is formed of a material, it is formed as a solid structure.

The stabilization layer is formed from a FKV. For example, the stabilization layer can be formed from GFK, CFK, AFK or another suitable FKV. The stabilization layer is preferably formed as a FKV laminate of multiple fiber layers. The stabilization layer is designed such that it encloses the core element in a subarea. This subregion is the lateral surface or one or more sections of the lateral surface of the core element. This means that the stabilization layer can be formed in one piece or in several parts. For example, the stabilization layer may have two or three parts. The stabilization layer may extend, for example, from the first storage area along the first arm to the central storage area and from the second storage area along the second arm to the central storage area. In this case, the stabilization layer encloses the second portion of the lateral surface. In addition, the stabilization layer may extend from the first storage area along the first arm across the central storage area to the second storage area. In this case, the stabilization layer encloses the first portion of the lateral surface. The stabilization layer can either be connected to the load transfer elements and to the central charge introduction element, or the fibers of the stabilization layer can run around the two load transfer elements and the central load transfer element.

The stabilizing layer serves to accommodate the high transverse loads encountered during a driving operation when the three-point link is used in a vehicle. In addition, the stabilization layer serves to accommodate longitudinal loads occurring along the arms during this driving operation. The stabilization layer also serves to accommodate occurring during this driving bending loads that z. B. can be caused by the transverse loads and / or the longitudinal loads.

The support winding is formed from a FKV. For example, the support winding may be made of GFK, CFK, AFK or other suitable FKV. The support winding is formed of unidirectional plastic composite fiber strands, which are preferably endless fiber reinforced. For example, a prepreg prepreg material having a duromer or thermoplastic matrix may be used to form the support coil (eg, TowPreg or tape). This is both inexpensive and advantageous for the production of the three-point link, since this material is suitable for high winding speeds. The supporting winding encloses the load-introducing elements, the central-load-discharging element, the stabilizing layer and the core element in one subarea. In other words, the supporting winding is wound around the load insertion members, the center key insertion member, the stabilizing sheet and the core member, so that the supporting winding defines an outer shape of the three-point link. The support winding thus forms the two arms and the central storage area connecting them. The support winding is operatively connected to the stabilization layer, with the two load-introducing elements and with the central key-in element. The support winding is more specifically materially connected to the stabilization layer. If the core element is not formed material-free, the support winding is also operatively connected to the core element. Actively connected here means that two components are directly connected to each other, wherein this connection is such that forces and moments between the two components can be forwarded. The support winding is formed by means of a combination of circumferential windings and cross windings. As a result, there is a partially thick-walled and largely closed composite laminate.

The support winding serves to accommodate the high transverse loads encountered during a driving operation when the three-point link is used in a vehicle. In addition, the carrying winding serves to accommodate longitudinal loads occurring along the arms during this driving operation. The support winding and the stabilization layer thus complement each other in their effect.

When the three-point link is used in a vehicle, loads acting on the bearings associated with the load-introducing elements act. The bearing, which is connected to the Zentralallasteinleitelement, loads act. As a result, tensile and compressive stresses as well as bending stresses occur in the three-point link. By the described multi-material structure of the three-point linkage, the fiber strands of the supporting winding are oriented in the loading direction. The three-point link has due to the shape of the arms by means of the stabilizing layer and the supporting winding, which are materially interconnected, a high moment of area moment of inertia, so that bending stresses occurring at the arms are reduced. The arms of the three-point link have a high strength. The train and Compressive stresses are absorbed by means of the stabilization layer and by means of the support winding.

An advantage of the three-point link shown here is that it has a lower mass than a conventional three-point link made of a metallic material. Thus, the three-point link has a great potential for lightweight construction without sacrificing load capacity in the relevant load direction. As a result, the total mass of the vehicle is reduced when using the three-point link in a vehicle, which leads to a fuel saving and an increase in the possible payload.

According to one embodiment, the stabilization layer has a unidirectional fiber direction which is oriented from the storage areas to the central storage area. That is, the fiber direction of the stabilization layer is oriented along the arms. The fiber direction is thus oriented from the first storage area to the central storage area and from the second storage area to the central storage area. Due to this unidirectional Faschtchtung the stabilization layer is particularly suitable to the occurring during a driving operation loads, eg. As transverse loads and longitudinal loads, record when the three-point link is used in a vehicle. The fiber direction of the stabilization layer is thus load-balanced.

According to a further embodiment, the stabilization layer is formed at least in two parts. Of course, the stabilization layer may also have more than two parts. A first part of the stabilization layer extends from the first storage area along the first arm to the central storage area, and a second part of the stabilization layer extends from the second storage area along the second arm to the central storage area. If the stabilization layer has more than two parts, a third part of the stabilization layer runs from the first storage area along the first arm over the central storage area and along the second arm to the second storage area.

The parts of the stabilizing layer may be either as already cured parts or wet with a highly viscous sticky during the manufacturing process Matrix present. If the parts are wet, they are preferably cured together with the support winding during the production process, so that the cohesive connection between the stabilization layer and the support winding is formed.

According to a further embodiment, the Zentrallasteinleitelement and the Lasteinleitelemente are formed from a metallic material. For example, the Zentralallasteinleitelement and each load-introducing element may be formed of aluminum, a steel, titanium or other suitable metallic material. The Zentrallasteinleitelement and the two Lasteinleitelemente may be formed of the same material. Alternatively, only the two load insertion elements may be formed of the same material. Preferably, the Lasteinleitelemente and Zentrallasteinleitelement be prepared by means of an extrusion process with low milling processing proportion.

According to a further embodiment, the Zentrallasteinleitelement and the Lasteinleitelemente are formed from a fiber-reinforced plastic composite material. For example, these may consist of a long fiber reinforced duromer, z. B. SMC (Sheet Molding Compound), or be formed from another suitable FKV. The Zentrallasteinleitelement and the two Lasteinleitelemente may be formed of the same material. Alternatively, only the two load insertion elements may be formed of the same material. Preferably, the Lasteinleitelemente and Zentrallasteinleitelement be prepared by means of an extrusion process with low milling processing proportion.

According to a further embodiment, fiber strands of the supporting winding in the region of the arms run parallel and stretched to the respective arm. This means that at least one fiber strand runs parallel and stretched on each arm to this arm. Preferably, however, a substantial portion or most of the fiber strands of the support coil on each arm are parallel and stretched to that arm.

In order to achieve this orientation of the fiber strands, the core structure has at least one winding aid during the manufacturing process of the three-point link and / or an angled and planar formation on the central storage area, so that the fiber strands can be selectively deflected and do not slip. For example, the core structure at the central storage area may have three or more surfaces which are perpendicular to the plane subtended by the bearing axes of the bearing grooves of the load introduction elements and the central key insertion element. These surfaces each have an angle to each other. For example, one or more of these surfaces can be arranged parallel to a bearing axis of a bearing receptacle of a load-introducing element. In winding the support coil during the manufacturing process, the fiber strands are perpendicular to the surface they contact.

An advantage of this arrangement of the fiber strands of the support winding is that thereby a load-compatible laminate is constructed and the fiber strands occupy the primary load paths.

According to a further embodiment, the Lasteinleitelemente and Zentrallasteinleitelement the same orientation. This means that the bearing shafts of the bearing receptacles of the load-transfer elements and the central load-insertion element are arranged relative to one another such that they lie in one plane. The bearing axis of the bearing receptacle of Zentrallasteinleitelements is not perpendicular to a plane which is spanned by the bearing axes of the bearing mounts of the load-introducing elements.

According to a further embodiment, the core element is formed from a plastic foam material. This plastic foam material may be, for example, foamed polyurethane, polypropylene, polycarbonate, or other suitable plastic. The advantage of this is that this plastic foam material has a low mass. As a result, the entire three-point link has a low mass. In addition, this plastic foam material is inexpensive and easy to manufacture and further process.

According to a further embodiment, the core element is formed from a metallic foam material. This metallic foam material can, for example, foamed aluminum, a bismuth-based metallic alloy, or other suitable metallic material. The advantage of this is that this metallic foam material has a low mass. As a result, the entire three-point link has a low mass.

According to a further embodiment, the core element is formed material-free. This means that the three-point link is hollow. This is achieved during the manufacturing process by using a releasable core structure which is enclosed by the stabilization layer and by the support winding in a partial region. This is triggered after curing of the supporting winding and possibly the stabilizing layer, so that no material of the core structure remains in the three-point link. For example, a detachable core structure of a metallic

Foam material, e.g. As a foamed metallic bismuth-based alloy, or a soluble core structure based on salt can be used.

The advantage of this is that the three-point link has a very low mass by the material-free core element in contrast to a conventional three-point link made of a metallic material. Nevertheless, the three-point link has a comparable rigidity.

In a method for manufacturing a three-point linkage which has already been described in the previous description, a core structure is provided. This core structure forms the basic form of the three-point link. Each load-introducing element is arranged on a storage area and integrated into the core structure. For example, the Lasteinleitelemente can be positively connected to the core structure, z. B. are placed on or in the core structure, and / or materially connected to the core structure. The Zentralallasteinleitelement is arranged at the central storage area and integrated into the core structure. The Zentrallasteinleitelement can be positively and / or materially connected to the core structure. For example, the core structure may have a bore, in which the Zentrallasteinleitelement is plugged or with the Zentrallasteinleitelement is glued. The stabilization layer is connected to the core structure, so that it encloses the core structure in a partial region, wherein this connection takes place by means of a bond. The stabilization layer is thus materially bonded to the core structure. The support winding is wound around the core structure, the stabilization layer, the load introduction elements and the Zentraltasteinleitelement, thereby fixing the stabilization layer in position, and wherein the support winding is guided such that fiber strands of the support winding in the region of the arms parallel and stretched to the respective arm run.

The winding of the support winding is z. B. by means of a 3D winding process. The fiber strands of the support winding are wound around and operatively connected to the center key insertion element, around the load introduction elements, around the stabilization layer and around the core structure. By winding creates a planar support winding structure on the top surfaces of the three-point link. On the lateral surface of the three-point link, the fiber strands of the carrying winding at an angle to each other. After completion of the winding, the support winding is present as a partially thick-walled and largely closed composite laminate. The support winding also fixes the Zentrallasteinleitelement and the two Lasteinleitelemente at their spatial position. Finally, the three-point link is cured.

In one embodiment, the stabilizing layer is wet when bonded to the core structure. This means that the stabilization layer is present as a pre-impregnated fiber structure provided with a highly viscous, tacky matrix. As a result, a cohesive adhesive bond is created between the core structure and the stabilization layer when the stabilization layer is joined to the core structure. After the supporting winding has been wound around the core structure, the stabilizing layer, the load-introducing elements and the central key-in element, the supporting winding and the stabilizing layer are cured together. Thus arises between the stabilizing layer and the support winding a cohesive connection. After this curing, the stabilization layer is fixed at its spatial position by means of the support winding. According to a further embodiment, the stabilization layer is cured in the connection with the core structure. The stabilization layer is thus already in the target geometry in the connection with the core structure and does not have to be cured together with the support winding. After curing of the support winding, the stabilization layer is fixed at its spatial position by means of the support winding.

According to a further embodiment, the support winding is wound by means of a 3D Wickleverfahrens. In this case, either the core structure, which is connected to the stabilizing layer, the Lasteinleitelementen and Zentralallasteinleitelement, are rotated and the fiber strands of the support winding are fed stationary, or the core structure, which is connected to the stabilization layer, the Lasteinleitelementen and Zentralallasteinleitelement is held stationary and the fiber strands of the support winding are wound around them. For example, two handling robots can be used for this purpose.

According to a further embodiment, the core structure has winding aids, so that the fiber strands of the support winding are deflected at predetermined intervals during the winding process. These winding aids can be, for example, surfaces which have a certain angle to one another. For example, the winding aids can also be projections, undercuts or recesses.

According to a further embodiment, the core structure is formed such that it remains in the three-point link after curing of the three-point link, so that the core structure forms a core element of the three-point link. The core structure is in this case from a permanent, d. H. insoluble plastic foam material or of a permanent, d. H. insoluble metallic

Foam material formed. The plastic foam material may be, for example, foamed polyurethane, polypropylene, polycarbonate, or other suitable plastic. The metallic foam material may be, for example, foamed aluminum, a bismuth-based metallic alloy or another suitable metallic material. According to a further embodiment, the core structure is detachably formed and is triggered after curing of the three-point link from the three-point link, so that a material-free core element is formed. For example, the core structure of a metallic foam material, for. B. from a foamed metallic bismuth-based alloy, or a soluble core structure based on salt. The triggering of the core structure can take place, for example, by flushing with a fluid. After the triggering of the core structure, the support winding, the stabilization layer, the load introduction elements and the central load introduction element remain in their spatial position.

Various embodiments and details of the invention will be described in more detail with reference to the figures explained below. Show it:

1 is a schematic representation of a core structure, a Zentrallasteinleitele- management and two load input elements of a three-point link according to an embodiment,

FIG. 2 shows a schematic detail of the enlargement range A from FIG. 1, FIG.

3 is a schematic representation of the finished three-point link according to the embodiment of FIG. 1 and FIG. 2,

4 shows a schematic representation of a three-point link according to a further exemplary embodiment,

5 shows a schematic detail of the enlargement region B from FIG. 4.

1 shows a schematic representation of a core structure 10, a stabilization layer 7, a central shutter element 6 and two load introduction elements 5 of a three-point link 1 according to an exemplary embodiment. The three-point link 1 is not finished in the illustration shown here, but is still in the manufacturing process. The core structure 10 forms the basic shape of the three-point link 1. The core structure 10, like the three-point link 1, has a central storage area 3 and two arms 2. Each arm 2 has a storage area 4. A first arm 2 has a first storage area 4. A second arm 2 has a second storage area 4. Each arm 2 is connected to the central storage area 3. Each storage area 4 limits its corresponding arm 2 to a central storage area 3 opposite side. The three-point link 1 is formed symmetrically to a center plane, of which only a central axis 12 is shown here. The three-point link 1 has two top surfaces and a lateral surface. The core structure 10 is formed from a plastic foam material.

At each storage area 4 a Lasteinleitelement 5 is arranged. This Lasteinleitelemente 5 are uniformly shaped to each other. Each load-introducing element 5 has a bearing receptacle 14, which is suitable for receiving a bearing when the three-point link 1 is used in a vehicle. Each bearing receptacle 14 has a circular cross-section. In addition, each bearing receptacle 14 has a bearing axis 1 1. The bearing axles 11 of the two load introduction elements 5 are arranged in the same plane. This plane is perpendicular to the median plane in which the central axis 12 is arranged. The Lasteinleitelemente 5 are operatively connected to the core structure 10 and integrated into it.

At the central storage area 3, the Zentralallasteinleitelement 6 is arranged. For this purpose, the core structure 10 has a bore. The Zentrallasteinleitelement 6 is operatively connected to the core structure 10 and integrated into it. The Zentrallasteinleitelement 6 has a bearing receptacle 14 which has a circular cross-section. The bearing receptacle 14 also has a bearing axis 1 1. This bearing axis 1 1 of the bearing receptacle 14 of the Zentrallasteinleitelements 6 is arranged in the same plane as the bearing axes 1 1 of the bearing mounts 14 of the Lasteinleitelemente 5. The Lasteinleitelemente 5 and 6 Zentrallasteinleitelement therefore have the same orientation. The Lasteinleitelemente 5 and the Zentrallasteinleitelement 6 are formed from the same material, for. B. from a FKV or from a metallic material. The stabilizing layer 7 is in three parts and formed as a laminate. A first part of the stabilization layer 7 extends from the first storage area 4 along the first arm 2 to the central storage area 3. A second part of the stabilization layer 7 extends from the second storage area 4 along the second arm 2 to the central storage area 3. A third part of Stabilization layer 7 extends from the first storage area 4 along the first arm 2 via the central storage area 3 along the second arm 2 to the second storage area 4. The first and the second part of the stabilization layer 7 thus form an outer surface of the three-point link 1 from. The third part of the stabilizing layer 7 thus forms an inner circumferential surface of the three-point link 1. The stabilization layer 7 has a unidirectional fiber direction, which is shown in more detail in FIG. 2 by means of the magnification range A.

The stabilization layer 7 is connected to the core structure 10 by means of an adhesive bond. In addition, the stabilizing layer 7 is connected by means of an adhesive connection with the two Lasteinleitelementen 5 surface. In addition, the stabilizing layer 7 is connected by means of an adhesive connection surface with the Zentrallasteinleitelement 6. The stabilization layer 7 thus encloses the core structure 10 in a partial area.

At the central storage area 3, the core structure 10 has three surfaces on its side facing away from the storage areas 4. These surfaces are perpendicular to the plane which is spanned by the bearing shafts 11 of the load introduction elements 5 and 6 Zentrallasteinlei--. A first of these surfaces is parallel to the bearing axis 11 of the bearing receptacle 14 of the first load-introducing element 5. A second of these surfaces is parallel to the bearing axis 11 of the bearing receptacle 14 of the second Lasteinleitelements 5. A third of these surfaces is parallel to the Bearing axis 11 of the bearing seat 14 of the Zentralallasteinleitele- element 6. These three surfaces have each other so angle. Due to this arrangement of the surfaces to each other, the fiber strands of the support winding can be selectively guided and deflected in the further manufacturing process. This is shown in Fig. 3 in more detail. FIG. 2 shows a schematic detail representation of the enlargement range A from FIG. 1. Here it can clearly be seen that the fiber direction 13 of the stabilization layer 7 is unidirectional. In addition, the fiber direction 13 extends along the longitudinal extent of the arm 2, from the storage area 4 to the central storage area 3. Due to the unidirectional fiber direction 13, the stabilizing layer 7 is particularly suitable for receiving the transverse loads and longitudinal loads occurring during a driving operation when the three-point link 1 used in a vehicle.

Fig. 3 shows a schematic representation of the finished three-point link 1 according to the embodiment of Fig. 1 and Fig. 2. Shown here is the three-point link 1 after curing of the support winding 9. The support winding 9 is not completely and greatly simplified shown for clarity. Since the core structure 10 of FIG. 1 and FIG. 2 is a permanent core structure 10 and is not detachable, this forms the core element 8 after curing. The core element 8 is therefore formed from the same material as the core structure in FIG. 1 and FIG. 2.

The support winding 9 is formed from a FKV. It can be clearly seen that the supporting winding 9 encloses the core element 8, the stabilizing layer 7, the load-transfer elements 5 and the center-loading element 6 in a partial region. The supporting winding 9 is therefore wound around the stabilizing layer 7, around the load-introducing elements 5 and around the center-loading element 6. The support winding 9 fixes the stabilizing layer 7 in addition to its position. Of course, several fiber strands of the support winding 9 run parallel to each arm 2 and stretched to this arm 2. This is made possible by the shape of the central storage area 3 by means of three surfaces, which has already been shown in Fig. 1. The three surfaces represent the winding aids. The fiber strands of the support winding 9 are oriented in the loading direction. The three-point link 1, due to the stabilization layer 7 and the support winding 9, which on the arms 2 of the Three-point link 1 are connected to each other, a high area moment of inertia, so that occurring at the arms 2 bending stresses can be reduced.

When the three-point link 1 is used in a vehicle, loads acting on the bearings connected to the load introduction members 5 act. On the bearing, which is connected to the Zentralallasteinleitelement 6, loads act. As a result, occur in the three-point link 1 tensile and compressive stresses and bending stresses. The tensile and compressive stresses are absorbed by means of the stabilizing layer 7 and by means of the support winding 9. An advantage of the three-point link 1 shown is that this has a high lightweight potential, since its mass is significantly lower than in a conventional three-point link made of a metallic material.

Fig. 4 shows a schematic representation of a three-point link 1 according to a further embodiment. The three-point link 1 is shown in a plan view. The three-point link 1 has the same components as the three-point link of Fig. 1 to Fig. 3, namely a core element 8, two Lasteinleitelemente 5, a Zentrallasteinleitelement 6, a three-part stabilization layer 7 and a support winding 9. The three-point link 1 has two storage areas 4, the central storage area 3 and two arms 2. The stabilizing layer 7 is formed as a laminate. The arrangement, formation and connections of these components to one another are the same as in FIGS. 1 to 3. However, the core element 8 shown here and the support winding 9 shown here are shaped differently, which again illustrates more clearly the enlargement region B in FIG. 5.

The core element 8 forms the basic shape of the three-point link 1. A first arm 2 has a first storage area 4. A second arm 2 has a second storage area 4. Each arm 2 is connected to the central storage area 3. Each storage area 4 limits its corresponding arm 2 to a central storage area 3 opposite side. The three-point link 1 is formed symmetrically to a center plane, of which only a central axis 12 is shown here. The three-point link 1 has two top surfaces and a lateral surface. The core element 8 is formed from a plastic foam material. The connection of the Core element 8 with the load introduction elements 5 and the central load input element 6 as well as with the stabilization layer 7 is shown as well as in FIGS. 1 to 3.

At the central storage area 3, the core element 8 has three surfaces on its side facing away from the storage areas 4. These surfaces constitute winding aids. These surfaces are perpendicular to the plane which is spanned by the bearing shafts 11 of the load-introducing elements 5 and the central-load-discharging element 6. A first of these surfaces is parallel to the bearing axis 11 of the bearing receptacle 14 of the first load introduction element 5. A second of these surfaces is parallel to the bearing axis 11 of the bearing receptacle 14 of the second Lasteinleitelements 5. A third of these surfaces is parallel to the bearing axis 11 of the bearing receptacle 14 of Zentrallasteinleitelements 6. This third surface is formed significantly smaller than in Fig. 1 and Fig. 3. These three surfaces have each other so angle. Due to this arrangement of the surfaces to each other, the fiber strands of the support winding 9 are guided and deflected.

The support winding 9 is formed from a FKV. It can be clearly seen that the supporting winding 9 encloses the core element 8, the stabilizing layer 7, the load-transfer elements 5 and the central-load-discharging element 6 in a partial area. The supporting winding 9 is thus wound around the stabilizing layer 7, around the load-introducing elements 5 and around the central-load-discharging element 6. The support winding 9 fixes the stabilizing layer 7 in addition to its position. Of course, a plurality of fiber strands of the support winding 9 run parallel to each arm 2 and stretched to this arm 2. Here, however, only a fiber strand is shown for reasons of clarity. A fiber strand of the support winding 9 is perpendicular to the bearing axis 11 of the bearing receptacle 14 of the Zentrallasteinleitelements 6 and thus in the center plane, of which the central axis 12 is shown. This is made possible by the shaping of the central storage area 3 by means of the three surfaces. The fiber strands of the support winding 9 are oriented in the loading direction. The three-point link 1 has a high due to the stabilizing layer 7 and the support winding 9, which are connected to the arms 2 of the three-point link 1 together Area moment of inertia, so that occurring at the arms 2 bending stresses are reduced.

The three-point link 1 shown here has the same advantages as already described in FIG.

FIG. 5 shows a schematic detail of the enlargement region B from FIG. 4. It can be clearly seen that the three surfaces of the core element 8 serve to deflect the fiber strands of the support winding 9 in a targeted manner. The surfaces represent the winding aids. In addition, the course of the fiber strands of the support winding 9 to each other and to the core element 8 is shown. There is a much simplified representation of the three-point link 1 before. After completion of the three-point link, the support winding 9 is thick-walled and largely closed.

The examples shown here are only examples. For example, the core structure can be made detachable so that it is dissolved out of the three-point link after curing and a material-free core element is present.

REFERENCE CHARACTERS

1 three-point link

2 arm

3 central warehouse area

4 storage area

5 load introduction element

6 Zentrallasteinleitelement

7 stabilization position

8 core element

9 carrying winding

10 core structure

11 bearing axis

12 central axis

13 fiber direction

14 bearing receptacle

A magnification range

B magnification range

Claims

claims

1. three-point link (1) for a chassis of a vehicle, wherein

- The three-point link (1) has two arms (2) and a central storage area (3),

each arm (2) has a storage area (4),

- The three-point link (1) comprises two load introduction elements (5), a Zentrallasteinleitelement (6), a stabilization layer (7), a core element (8) and a support winding (9) comprises,

- The stabilization layer (7) and the support winding (9) are formed from a fiber-reinforced plastic composite material,

- At each storage area (4) a Lasteinleitelement (5) is arranged,

the central key introduction element (6) is arranged on the central storage area (3),

- The core element (8) of the stabilizing layer (7) is enclosed in a partial area, and

- The support winding (9), the Lasteinleitelemente (5), the Zentrallasteinleitelement (6), the stabilizing layer (7) and the core element (8) in a partial area encloses.

2. three-point link (1) according to claim 1, characterized in that the stabilizing layer (7) has a unidirectional fiber direction, which is oriented from the storage areas (4) to the central storage area (3).

3. three-point link (1) according to one of the preceding claims, characterized in that the stabilizing layer (7) is formed at least in two parts.

4. three-point link (1) according to claim 3, characterized in that a first part of the stabilizing layer (7) from a first storage area (4) to the central storage area (3), and that a second part of the stabilizing layer (7) from a second storage area (4) to the central storage area (3).

5. three-point link (1) according to claim 4, characterized in that a third part of the stabilization layer (7) from the first storage area (4) to the second storage area (4).

6. three-point link (1) according to one of the preceding claims, characterized in that the Zentrallasteinleitelement (6) and the Lasteinleitelemente (5) are formed from a metallic material.

7. three-point link (1) according to one of the preceding claims, characterized in that the Zentrallasteinleitelement (6) and the Lasteinleitelemente (5) are formed from a fiber-reinforced plastic composite material.

8. three-point link (1) according to one of the preceding claims, characterized in that fiber strands of the supporting winding (9) in the region of the arms (2) parallel and stretched to the respective arm (2).

9. three-point link (1) according to one of the preceding claims, characterized in that the Lasteinleitelemente (5) and the Zentrallasteinleitelement (6) have the same orientation.

10. three-point link (1) according to one of the preceding claims, characterized in that the core element (8) is formed from a Kunststoffschaumma- material.

11. three-point link (1) according to one of claims 1 to 9, characterized in that the core element (8) is formed from a metallic foam material.

12. three-point link (1) according to one of claims 1 to 9, characterized in that the core element (8) is formed material-free.

13. A method for producing a three-point link (1) according to one of claims 1 to 9, characterized in that

a core structure (10) is provided,

each load introduction element (5) is arranged on a storage area (4) and integrated into the core structure (10),

the central key introduction element (6) is arranged on the central storage area (3) and integrated into the core structure (10), - The stabilization layer (7) is connected to the core structure (10), so that it encloses the core structure (10) in a partial area, wherein this connection is effected by means of a bond,

- The support winding (9) to the core structure (10), the stabilizing layer (7), the Lasteinleitelemente (5) and the Zentralallasteinleitelement (6) is wound, thereby fixing the stabilizing layer (7) in position, and wherein the supporting winding (9) is guided such that fiber strands of the support winding (9) in the region of the arms (2) extend parallel and stretched to the respective arm (2),

- The three-point link (10) is cured.

14. The method according to claim 13, characterized in that the stabilization layer (7) in the connection with the core structure (10) is wet.

15. The method according to claim 13, characterized in that the stabilization layer (7) is cured in the connection with the core structure (10).

16. The method according to any one of claims 13 to 15, characterized in that the supporting winding (9) by means of a 3D Wickleverfahrens is wound.

17. The method according to any one of claims 13 to 16, characterized in that the core structure (10) comprises winding aids, so that the fiber strands of the support winding (9) are deflected at predetermined intervals during the winding process targeted.

18. The method according to any one of claims 13 to 16 for producing a three-point link (1) according to claim 10 or 11, characterized in that the core structure (10) is designed such that this after curing of the three-point link (1) in the three-point link ( 1) remains, so that the core structure (10) forms a core element (8) of the three-point link (1).

19. The method according to any one of claims 13 to 16 for producing a three-point link (1) according to claim 12, characterized in that the core structure (10) is detachably formed and that after hardening of the three-point link (10) is triggered from the three-point link (10), so that a material-free core element (8) is formed.