DE102013218539A1 - Component and vehicle comprising a component - Google Patents

Abstract

The invention relates to a component comprising a first fastening element, a second fastening element and an intermediate element, which connects the first fastening element and the second fastening element, wherein the intermediate element comprises dry fibers, which are designed to absorb tensile forces between the first fastening element and the second fastening element, and wherein a fiber composite outer skin encloses the first fastener, the second fastener and the intermediate member.

Description

The present invention relates to a component which is preferably usable in a vehicle. Furthermore, the invention relates to a vehicle comprising a component.

In vehicles steel components are used to form in particular trailing arms and / or control arm of a vehicle. However, such components have a high weight and often unfavorable deformation or crash behavior. Therefore, there is a desire to manufacture such device from other materials, in particular composite materials.

It is already a fiber composite component, in particular a train-pressure strut DE 10 2005 059 933 B4 known. This component has a perpendicular to the longitudinal sides or transverse sides braided fiber composite structure. Furthermore, the component is characterized by a passage opening on at least one end side. The component consists of an inner element, a braided fiber composite material, which is composed of carbon fibers, glass fibers and / or aramid fibers. The core element consists of a foam core braided with fibers.

Another component is from the DE 43 23 510 A1 known. This document discloses a tensile and / or compression strut which has a low thermal conductivity for temporarily high mechanical loads. The fiber composite drawstrings are arranged mainly in the load direction between the strut ends for receiving forces. In addition, the fiber composite drawstrings can be variably biased. The drawstrings are made of carbon fiber composite or fiberglass composite.

With the described prior art components, however, no satisfactory results could be achieved when used in vehicles. It is therefore an object of the invention to provide a device that enables safe and reliable absorption of forces with simple and cost-effective production and low-effort assembly.

This object is solved by the features of the independent claim. Accordingly, the object is achieved by a component which comprises a first fastening element, a second fastening element and an intermediate element. The intermediate element connects the first fastening element and the second fastening element. It is provided according to the invention that the intermediate element comprises dry fibers, which are designed to absorb tensile forces between the first fastening element and the second fastening element. Dry fibers are to be understood here in particular as meaning those fibers which are not surrounded by a matrix of an additional material, in particular plastic. In this case, dry fibers can still be soaked in liquids, the liquids absorb no forces. According to the invention, the component further comprises an outer skin composed of fiber composite material. The outer skin encloses the first fastening element, the second fastening element and the third fastening element. Due to the fact that the outer skin is made of fiber composite material, this pressure forces increases. Thus, the invention provides that via parameters of the outer skin, in particular on the thickness, a predefined compressive strength and thus a predefined energy absorption at pressure load of the device is adjustable. This allows a desired deformation behavior and / or behavior in the event of a crash to be set reliably. Since it is provided according to the invention that the dry fibers absorb most of the tensile forces, a tensile strength of the component also remains after damage, in particular a fracture, of the outer skin. This prevents in particular a tearing of the device. By realizing the component as a fiber composite element a very high weight saving compared to conventional steel elements is present. This is achieved in particular by the fact that the dry fibers are not surrounded by a matrix of additional material. According to the dry fibers are protected by the outer skin yet from external influences.

The dependent claims have preferred developments of the invention to the content.

Advantageously, the fiber composite material of the outer skin is a carbon fiber reinforced plastic and / or a glass fiber reinforced plastic and / or a aramid fiber reinforced plastic. Likewise, the dry fibers are advantageously glass fibers and / or carbon fibers and / or aramid fibers. Such fibers are easy and inexpensive to process and allow the absorption of high forces. In this case, the fibers have a low weight, so that the device can also be realized with very low weight.

Preferably, the intermediate element comprises a protective layer, which is particularly preferably a film. The film is particularly applied between the dry fibers and the outer skin. In this way it is prevented that the dry fibers, in particular during the manufacturing process, come in contact with uncured plastic. Therefore, the protective layer provides advantageously ensuring that the dry fibers are not accidentally soaked so as to preclude accidental formation of a matrix around the dry fibers.

The first fastening element and the second fastening element are preferably used for connecting the component to a further component. For this purpose, the first fastening element and / or the second fastening element advantageously comprises an eyelet, which is wrapped with rovings. Rovings are preferably bundles of parallel filaments.

The rovings are preferably mounted inside a plastic matrix.

The rovings particularly preferably comprise glass fibers and / or carbon fibers and / or aramid fibers. The advantage of these fibers has already been explained above.

Advantageously, the device is designed such that the dry fibers are wetted or impregnated with a liquid. The liquid preferably does not absorb any forces, so that it has no effect on the stability of the component.

Particularly preferably, the liquid is colored with a predefined color. This allows the detection of damaged components, since damaging the outer skin allow leakage of the liquid and the color of the inked liquid is recognizable. Thus, there is advantageously a possibility of detecting and sorting out damaged components, in particular before their use. Also, it is advantageously possible to determine an overload of the component in use. Therefore, the device according to the preferred embodiment is particularly suitable for the use of safety-critical components, in particular for use in chassis of vehicles.

Furthermore, it is particularly preferred that the liquid prevents impregnation of the dry fibers with a non-cured Kunstsoff, in particular with a resin. This ensures that the dry fibers, in particular during the manufacturing process of the component, are not accidentally soaked with a non-hardened plastic. Therefore, accidental formation of a matrix around the dry fibers is precluded.

In addition, it is preferably provided that the dry fibers have a predefined prestress within the intermediate element. In this way, the rigidity of the device is advantageously increased.

The invention further relates to a vehicle comprising a previously described component. The component is in particular a trailing arm and / or wishbone of the vehicle. Thus, the vehicle according to the invention has a safe and reliable chassis, since the device according to the invention receives forces safely and reliably. Furthermore, the low weight of the device allows a weight reduction of the vehicle compared to conventional vehicles.

Further details, features and advantages of the invention will become apparent from the following description and the figures. Show it:

1 a schematic overview of a device according to an embodiment of the invention, and

2 a schematic overview of a vehicle according to an embodiment of the invention.

1 shows a component 1 according to an embodiment of the invention. The component 1 includes a first fastener 2 , a second fastener 3 and an intermediate element 4 , The intermediate element 4 serves to connect the first fastener 2 and the second fastener 3 , The intermediate element 4 includes dry fibers 6 for absorbing tensile forces between the first fastening element 2 and the second fastening element 3 are formed. The dry fibers 6 are in particular glass fibers and / or carbon fibers and / or aramid fibers.

An outer skin 5 is present, which is the first fastener 2 , the second fastener 3 and the intermediate element 4 surrounds. The outer skin 5 is made of a carbon fiber composite and allows the absorption of compressive forces. Thus, a predefined compressive strength of the device 1 about parameters of the outer skin 5 , in particular about the thickness of the outer skin 5 , adjustable. Because the dry fibers 6 can absorb almost exclusively tensile forces, is the compressive strength of the device 1 almost exclusively on the outer skin 5 adjustable. On the other hand, in the device 1 a failure of the outer skin 5 a tensile strength through the dry fibers 6 continues to be guaranteed. In this way, in particular a rupture of the component in a crash 1 almost impossible.

The outer skin 5 further serves to shield the dry fibers 6 opposite outer Influences. Thus, the dry fibers 6 protected, although they are not arranged within a matrix of another material. Thus, during the manufacturing process, no hardened plastic, in particular resin, in the dry fibers is preferred 6 can then penetrate around a matrix for the dry fibers 6 to form are the dry fibers 6 from a protective layer 7 surround. The protective layer 7 is in particular a film containing the dry fibers 6 shields.

Also is an unwanted impregnation of the dry fibers 6 using resin makes it difficult for the dry fibers 6 are surrounded by a liquid and / or wetted with the liquid, which is a soaking of the dry fibers 6 prevented with resin. However, the liquid itself does not harden and thus does not form a matrix around the dry fibers 6 , This means that the liquid absorbs no forces and the stability of the device 1 not changed.

The liquid is especially colored. This is advantageous in that as a result damage in the outer skin 5 are easily recognizable. Because existing defects within the outer skin 5 allow leakage of the colored liquid, a discoloration around the damaged area can be seen from the outside. Thus, damaged components 1 already marked and can, especially before their actual use, be sorted out. Also is due to a discoloration of the device 1 while in use, an overload is noticeable.

The first fastening element 2 includes an eyelet 8th that of rovings 9 is wrapped. The rovings 9 are surrounded by a plastic matrix. Thus, the rovings 9 around the eyelet 8th fixed around. The rovings 9 are in particular bundles of glass fibers and / or carbon fibers and / or aramid fibers. The second fastening element 3 is analogous to the first fastener 2 built up.

2 shows a vehicle 10 according to an embodiment of the invention. In 2 is exemplary for all wheels of the vehicle 10 the front right wheel 11 shown. The wheel 11 is about a suspension 12 with a chassis (not shown) of the vehicle 10 connected.

The vehicle 10 includes a component 1 , where the component 1 especially the in 1 shown component 1 is. The component 1 forms inside the suspension 12 of the vehicle 10 a wishbone. Alternatively, the device 1 also usable as trailing arm.

LIST OF REFERENCE NUMBERS

1

module

2

first connecting element

3

second connecting element

4

intermediate element

5

shell

6

dry fibers

7

protective layer

8th

eyelet

9

rovings

10

vehicle

11

wheel

12

Arm

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 102005059933 B4 [0003]
• DE 4323510 A1 [0004]

Claims (10)

Component ( 1 ), comprising - a first fastening element ( 2 ), - a second fastening element ( 3 ), and - an intermediate element ( 4 ), which is the first fastening element ( 2 ) and the second fastening element ( 3 ), - wherein the intermediate element ( 4 ) dry fibers ( 6 ) adapted to absorb tensile forces between the first fastening element ( 2 ) and the second fastening element ( 3 ) are formed, and - wherein an existing fiberglass outer skin ( 5 ) the first fastening element ( 2 ), the second fastening element ( 3 ) and the intermediate element ( 4 ) encloses. Component ( 1 ) according to claim 1, characterized in that the fiber composite material of the outer skin ( 5 ) is a carbon fiber reinforced plastic and / or a glass fiber reinforced plastic and / or an aramid fiber reinforced plastic. Component ( 1 ) according to one of the preceding claims, characterized in that the dry fibers ( 6 ) Glass fibers and / or carbon fibers and / or aramid fibers are. Component ( 1 ) according to one of the preceding claims, characterized in that the intermediate element ( 4 ) a protective layer ( 7 ), in particular a film which, between the dry fibers ( 6 ) and the outer skin ( 5 ) is attached. Component ( 1 ) according to one of the preceding claims, characterized in that the first fastening element ( 2 ) and / or the second fastening element ( 3 ) an eyelet ( 8th ) with rovings ( 9 ), whereby the rovings ( 9 ) are mounted within a plastic matrix. Component according to claim 5, characterized in that the rovings ( 9 ) Glass fibers and / or carbon fibers and / or aramid fibers. Component ( 1 ) according to one of the preceding claims, characterized in that the dry fibers ( 6 ) are impregnated with a liquid. Component ( 1 ) according to claim 7, characterized in that the liquid is colored with a predefined color. Component ( 1 ) according to claim 7 or 8, characterized in that the liquid impregnation of the dry fibers ( 6 ) prevented with a non-cured Kunstsoff. Vehicle ( 10 ) comprising a component ( 1 ) according to one of the preceding claims, wherein the component ( 1 ) is in particular a trailing arm and / or wishbone.

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