DE102020205152A1 - Load transfer component - Google Patents

Abstract

Load transfer component with a component body (2) and several force introduction areas (3, 4, 5) provided on this, of which at least one has a force introduction element (7) made of plastic, which is provided with a bearing receptacle in the form of a recess (6) and which extends in a circumferential direction ( u) is enclosed by a casing (18) formed by a continuous fiber structure (25) embedded in a matrix, the continuous fiber structure (25) of which has an interruption (19) in the circumferential direction (u), the continuous fiber structure (19) in the area of the interruption (19) 25) an insert (20) is integrated into the force introduction element (7).

Description

The invention relates to a load transfer component with a component body and several force introduction areas provided on this, at least one of which has a force introduction element made of plastic, provided with a bearing receptacle in the form of a recess, which is enclosed in a circumferential direction by a casing formed by a continuous fiber structure embedded in a matrix whose continuous fiber structure has an interruption in the circumferential direction.

Such a load transfer component is used, for example, as a chassis component in the chassis of a vehicle and forms, for example, a suspension arm. Chassis control arms connect kinematic points in the vehicle's wheel suspension and transfer movements and forces, whereby a joint function is usually integrated into the force introduction element. The load transfer component is intended, for example, for a passenger vehicle (passenger vehicle) or for a commercial vehicle (commercial vehicle).

A large-scale production of chassis components from a fiber-plastic composite (FRP) takes place, for example, according to the resin injection process (RTM = Resin Transfer Molding) or according to the prepreg compression molding process (PCM = Prepreg Compression Molding). In addition to the material costs, a challenge in such production chains is the preform process.

In order to be able to reduce component costs and thus pave the way for such components in large-scale production, the preform process must be automated. For example, a three-point link is manufactured using a preform process that is composed of several process steps. In particular, the preforms are subdivided into several sub-preforms, which are sequentially placed one on top of the other in a final step in order to finally obtain an overall preform, which is also known as preform assembly, for example (Preform Assembly) is called.

A problem that arises in the sequential preform process with sub-preforms are binding points or joint areas at which two sub-preforms adjoin one another. The continuous fiber structure is interrupted at these points and the power transmission only takes place via the resin system. Since the mechanical properties of the resin are significantly lower than those of the laminate, such joint areas form weak points in the component produced.

The aforementioned problem can be solved, for example, by overlapping the preforms in the joint area or by adding a preform piece (patch) that overlaps the joint area. However, these solutions increase the complexity of the preform process, since the patch must first be provided and then reliably fixed in place, which requires turning the entire preform.

Proceeding from this, the invention is based on the object of being able to increase the stability of a load transfer component of the type mentioned at the beginning in the area of an interruption in the continuous fiber structure with little additional manufacturing and cost outlay.

According to the invention, this object is achieved by a load transfer component according to claim 1. Preferred developments of the invention are given in the subclaims and in the following description.

A load transfer component with a component body and several force introduction areas provided on this, of which at least one has a force introduction element made of plastic, provided with a bearing receptacle in the form of a recess, which is enclosed in a circumferential direction by a casing formed by a continuous fiber structure embedded in a matrix, the continuous fiber structure of which has an interruption in the circumferential direction is developed according to the invention in particular in that an insert is integrated into the force introduction element in the area of the interruption of the continuous fiber structure.

The force introduction element is reinforced in the area of the interruption by the insert. In particular, the insert is already integrated into the force introduction element during the production thereof, so that a preform process is not influenced by the insert during the production of the load transfer component. The force introduction element can be produced in an injection molding process or an injection molding process, in particular from thermoset or thermoplastic.

The matrix and / or the casing is preferably connected to the force introduction element, in particular in a materially bonded manner. The interruption of the continuous fiber structure in the circumferential direction is preferably a complete interruption of the continuous fiber structure. This is to be understood in particular that no continuous fibers of the sheathing and / or the continuous fiber structure run through the interruption in the circumferential direction and / or run through it. At the interruption, the continuous fiber structure has, for example, a gap, in particular in the circumferential direction. The interruption and / or the gap in the continuous fiber structure is advantageously bridged by matrix material and / or filled with matrix material.

The continuous fiber structure embedded in the matrix and / or the sheathing preferably consists of two partial shells, each of which comprises a part of the continuous fiber structure, in particular embedded in the matrix. The partial shells are preferably connected to one another in a materially bonded manner, in particular by the matrix. Each of the partial shells advantageously has a force-introducing element-side and / or free end, the force-introducing element-side and / or three ends facing one another in the area of the interruption and / or adjoining one another and / or being spaced apart from one another. Preferably, each of the partial shells is or is formed by a sub-preform during the production of the load transfer component. The part-shells are in particular half-shells. The aforementioned distance is preferably filled with matrix material.

According to one embodiment, the insert sweeps over the interruption of the continuous fiber structure in the circumferential direction. Thus, for example, the stability of the force introduction element can be increased in the area of the overlap. The insert is preferably integrated and / or embedded in the material and / or in the plastic of the force introduction element. The insert is preferably a flat component. The insert advantageously extends in the circumferential direction.

According to a further development, the force introduction element has a wall section delimiting the recess, preferably on the outside and / or inside, curved wall section in which in particular the insert is provided. The insert is preferably curved. The insert and / or a, in particular, central, region of the insert and / or the largest part of the insert is preferably designed to be curved in accordance with the wall section and / or the curvature of the wall section. The casing, in particular in the area of the wall section, the wall section and / or the curvature of the wall section, is advantageously designed to be correspondingly curved.

According to one embodiment, at least one through hole or several through holes is or are provided in the insert. Thus, during the manufacture of the force-introducing element, the plastic from which the force-introducing element is made can flow, for example, through the at least one through-hole or through the through-holes. In this way, for example, the adhesion and / or the connection between the insert and the plastic of the force introduction element can be improved. The at least one through hole is preferably or the through holes are penetrated by the material and / or the plastic of the force introduction element. The at least one through hole or the through holes are preferably designed as, or in each case as an elongated hole or elongated holes. Thus, during the manufacture of the force introduction element, for example fibers, in particular short fibers, can pass through the at least one through hole or through the through holes if the force introduction element is made of fiber-reinforced plastic. Alternatively, the at least one through hole or the through holes are, for example, round or circular. In addition or as an alternative, the insert has e.g. punchings or beads.

The surface of the insert is preferably cleaned and / or treated, for example cleaned with acetone, and / or subjected to a plasma treatment and / or structured with a laser, before it is integrated into the force introduction element. In this way, for example, the adhesion and / or the connection between the insert and the plastic of the force introduction element can be improved.

According to a further development, the force introduction element consists of fiber-reinforced plastic, in particular of short-fiber-reinforced plastic and / or of long-fiber-reinforced plastic. For example, the force introduction element is or is made from bulk molding compound (BMC) or sheet molding compound (SMC), preferably in a pressing tool. In particular, the insert is introduced into a mold of the pressing tool together with the BMC material or the SMC material, pressed and cured. The force introduction element preferably forms a dimensionally stable body. The plastic of the force introduction element is in particular a thermosetting plastic and / or a resin or synthetic resin. The fibers of the fiber-reinforced plastic of the force transmission element consist, for example, of glass fibers and / or of aramid fibers and / or of carbon fibers and / or of basalt fibers and / or of natural fibers.

According to one embodiment, the insert is bent over on at least one or on each of its end regions or on its end regions, preferably outwards or away from the recess or inwards or in the direction of the recess. As a result, an undercut in particular is formed on the at least one end region or on each of the end regions. A centering of the insert in the force introduction element and / or in the wall section during the manufacture of the force introduction element can thereby advantageously be achieved. According to one possible alternative, that is Insert is bent over at one of its end regions, for example, outwards or away from the recess, and bent over at another of its end regions, for example inwards or in the direction of the recess. The at least one end area or the end areas are preferably an end area or the end areas of the insert in the circumferential direction.

In particular, the insert has a wavy contour or a concavo-convex shape at least in its end regions. The wavy contour or concavo-convex design of the insert can also extend over the entire insert. In the case of the concavo-convex design, the insert can have several alternating concavo-convex sections. In particular, a wavy or concavo-convex design can prevent displacement of the insert during manufacture of the load transfer component, in particular in a pressing phase.

In particular, the insert forms a dimensionally stable body. For example, the insert is made of metal. In particular, the insert consists of aluminum or an iron material such as steel. Alternatively, the insert consists e.g. of a fiber-plastic composite, preferably a continuous fiber-plastic composite (E-FRP), in particular prepreg. The metal insert is produced e.g. by punching, water jet cutting or laser cutting. The insert made of E-FRP is manufactured e.g. by the PCM process, by the autoclave process or by the RTM process. Alternatively, the insert is made from E-FRP, e.g. from SMC material with continuous fiber reinforcement. The plastic of the E-FRP insert is in particular a thermosetting plastic and / or a resin or synthetic resin. The fibers of the E-FRP insert consist e.g. of glass fibers and / or of aramid fibers and / or of carbon fibers and / or of basalt fibers and / or of natural fibers.

The matrix consists in particular of a thermosetting plastic and / or of a resin or synthetic resin. The fibers of the continuous fiber structure consist, for example, of glass fibers and / or of aramid fibers and / or of carbon fibers and / or of basalt fibers and / or of natural fibers.

According to a further development, a joint or rubber bearing is arranged in the recess. The joint is e.g. a ball joint. The recess is preferably cylindrical. The load transfer component is preferably connected by means of the joint or rubber bearing to a machine part or vehicle part, which is, for example, a chassis component or a vehicle frame or vehicle body or a subframe or subframe.

According to one embodiment, a second of the force introduction areas has a second force introduction element which is provided with a second bearing receptacle in the form of a recess and which consists in particular of plastic. A joint or rubber bearing is preferably arranged in the recess of the second bearing receptacle. The joint is e.g. a ball joint. The recess of the second bearing receptacle is preferably cylindrical.

The second force introduction element is preferably enclosed in one, in particular second, circumferential direction by a second sheathing formed by the or a continuous fiber structure embedded in the or a matrix, the continuous fiber structure of which has a, preferably second, interruption in the, in particular the second, circumferential direction, wherein in the area this interruption of the continuous fiber structure a, in particular a second, insert is integrated into the second force introduction element.

According to a further development, a third of the force introduction areas has a third bearing receptacle in the form of a recess and / or a third force introduction element which is provided with a third bearing receptacle in the form of a recess and which consists in particular of plastic. A joint or rubber bearing is preferably arranged in the recess of the third bearing receptacle. The joint is e.g. a ball joint.

The component body preferably forms a dimensionally stable body. The force introduction elements are preferably connected to one another by the component body. The component body advantageously includes the casing. In particular, the component body comprises the partial shells or half-shells.

The load transfer component is preferably provided for a vehicle, in particular for a motor vehicle. The load transfer component preferably forms a chassis component. In particular, the load transfer component forms a suspension arm. For example, the load transfer component forms a two-point link or a three-point link. In particular, the force introduction element is arranged in a chassis component in which a joint function, in particular a rubber bearing or a ball joint, is arranged. The load transfer component or the chassis component can be designed as a 2-point link, a 4-point link or a transverse leaf spring.

• 1 eine perspektivische Darstellung eines Lastübertragungsbauteils gemäß einer Ausführungsform,
• 2 eine Explosionsansicht von mehreren Teilen des Lastübertragungsbauteils während seiner Herstellung,
• 3 eine Seitenansicht eines Krafteinleitungselement des Lastübertragungsbauteils,
• 4 eine Seitenansicht einer Ummantelung des Krafteinleitungselements,
• 5 eine Draufsicht auf einen in das Krafteinleitungselement integrierten Einleger,
• 6 eine Draufsicht auf einen in das Krafteinleitungselement integrierten Einleger gemäß einer ersten Variante,
• 7 eine Draufsicht auf einen in das Krafteinleitungselement integrierten Einleger gemäß einer zweiten Variante,
• 8 eine Seitenansicht des in das Krafteinleitungselement integrierten Einlegers,
• 9 eine Seitenansicht des in das Krafteinleitungselement integrierten Einlegers gemäß einer ersten Abwandlung,
• 10 eine Seitenansicht des in das Krafteinleitungselement integrierten Einlegers gemäß einer zweiten Abwandlung, und
• 11 eine Seitenansicht des in das Krafteinleitungselement integrierten Einlegers gemäß einer weiteren Abwandlung.

The invention is described below with reference to a preferred embodiment Described with reference to the drawing. show in the drawing:

• 1 a perspective view of a load transfer component according to an embodiment,
• 2 an exploded view of several parts of the load transfer component during its manufacture,
• 3 a side view of a force introduction element of the load transfer component,
• 4th a side view of a casing of the force introduction element,
• 5 a plan view of an insert integrated into the force introduction element,
• 6th a plan view of an insert integrated into the force introduction element according to a first variant,
• 7th a plan view of an insert integrated into the force introduction element according to a second variant,
• 8th a side view of the insert integrated into the force application element,
• 9 a side view of the insert integrated into the force introduction element according to a first modification,
• 10 a side view of the insert integrated into the force introduction element according to a second modification, and
• 11 a side view of the insert integrated into the force introduction element according to a further modification.

the end 1 is a perspective view of a three-point link designed as a load transmission component 1 according to one embodiment can be seen, which a component body 2 and several force introduction areas provided on this 3 , 4th and 5 having, wherein the force application area 3 one with a bearing receptacle in the form of a recess 6th provided force introduction element 7th made of plastic. The force application area also has 4th one with a bearing receptacle in the form of a recess 8th provided force introduction element 9 made of plastic, which is the force application element 7th is equivalent to. In the force application area 5 the component body 2 a bearing or joint mount in the form of a recess 10 (please refer 2 ) in which a ball joint 11 is arranged. The force introduction elements are preferably made 7th and 9 made of fiber-reinforced plastic.

the end 2 showing an exploded view of several parts of the load transferring member 1 shows during its manufacture are two sub-preforms 12th and 13th made of prepreg and an intermediate element 14th can be seen which is between the sub-preforms 12th and 13th is arranged. The sub-preforms 12th and 13th preferably form half-shells. The intermediate element 14th in particular forms a sub-preform itself and consists, for example, of two layers of prepreg, between which a metal layer is arranged. Alternatively, there is the intermediate element 14th For example only made of metal, only made of prepreg or two metallic layers, between which a layer of prepreg is arranged.

The sub-preform 12th , the intermediate element 14th and the sub-preform 13th are placed on top of each other in this order, with the previously produced force introduction elements 7th and 9 between end areas 15th and 16 the sub-preforms 12th and 13th are arranged and the intermediate element 14th with end areas 24 in in the force introduction elements 7th and 9 provided recesses 17th (Siege Fig, 3) is introduced. Then the sub-preforms 12th and 13th , the intermediate element 14th and the force introduction elements 7th and 9 joined together, which takes place in particular according to the PCM process (PCM = Prepreg Compression Molding). The end areas 15th and 16 each preferably form a partial shell or half shell.

Furthermore, the ball joint 11 , for example in the form of a joint cartridge, into the recess 10 introduced, which is preferably done before the PCM process, but can also be done afterwards. In addition, in the recordings 6th and 8th Introduced rubber bearings, which is preferably done according to the PCM process, but can also be done before.

The sub-preforms 12th and 13th each comprise continuous fibers embedded in a matrix and form, in particular according to the PCM method, with their in the area of the force introduction element 7th designated end areas 15th and 16 a sheath 18th , which is the force application element 7th in a circumferential direction u encloses what, for example, from the 1 , 3 and 4th can be seen. The sub-preforms preferably form 12th and 13th , in particular according to the PCM method, also with their in the area of the force application element 9 designated end areas 15th and 16 a second sheathing, which is the force introduction element 9 encloses in a circumferential direction.

The through the matrix material and the continuous fibers of the sub-preforms 12th and 13th formed sheath 18th has a continuous fiber structure formed by the continuous fibers 25th on, in the region of the mutually facing ends of the end regions 15th and 16 in the circumferential direction u a break 19th having. In the area of interruption 19th is in the force application element 7th an insert 20th integrated what made 3 can be seen. The depositor 20th is in single view in off 5 can be seen showing a top view of the insert 20th shows. Also shows 6th in plan view a first variant of the insert 20th and 7th in plan view a second variant of the insert, the insert according to FIG 5 can be replaced by both the first variant and the second variant. According to the first variant, there are several through holes in the insert 21 provided with a round cross-section. According to the second variant, there are several through holes in the insert 21 provided in the form of elongated holes. In the first and the second variant, the through holes are 1 in particular from the plastic material of the force introduction element 7th interspersed.

The depositor 20th is in single view in off 8th can be seen, which is a side view of the insert 20th shows. Also shows 9 a side view of the insert 20th according to a first modification, according to which the depositor 20th at its end areas 22nd is bent outwards. This results in particular in an undercut in the plastic material of the force introduction element 7th .

10 shows a side view of the insert 20th according to a second modification. Here, too, is depositor 20th at its end areas 22nd bent outwards. In addition, the insert has several concave or convex sections over its entire course 26th on. These sections 26th are here, for example, each semicircular. Thus, the depositor 20th overall a wavy contour or a concavo-convex shape.

11 shows a side view of the insert 20th according to a further modification. In its end areas 22nd instructs the depositor 20th a wavy contour or a concave-convex shape. In this exemplary embodiment, this contour or shape is formed by means of concave or convex sections of different design 26th realized.

The depositor according to 8th can through the depositor 20th according to the modification after 9 , 10 or 11 be replaced.

As from the 3 and 8th or 9 visible is the depositor 20th im in the force application element 7th integrated state curved. In particular, the force introduction element 7th one the recess 6th limiting, curved wall section 23 on where the depositor 20th is provided (see 3 ).

List of reference symbols

1

Load transfer component

2

Component body

3

Force application area

4th

Force application area

5

Force application area

6th

Recess / bearing mount

7th

Force transmission element

8th

Recess / bearing mount

9

Force transmission element

10

Recess

11

Ball joint

12th

Sub-preform

13th

Sub-preform

14th

Intermediate element

15th

End area of the sub-preform

16

End area of the sub-preform

17th

Recess

18th

Sheathing

19th

Interruption

20th

Depositors

21

Through hole

22nd

End area of the insert

23

Wall section of the force introduction element

24

End of the intermediate element

25th

Continuous fiber structure

26th

concave / convex section

u

Circumferential direction

Claims (10)

Load transfer component with a component body (2) and several force introduction areas (3, 4, 5) provided on this, of which at least one has a force introduction element (7) made of plastic, which is provided with a bearing receptacle in the form of a recess (6) and which extends in a circumferential direction ( u) is enclosed by a casing (18) formed by a continuous fiber structure (25) embedded in a matrix, the continuous fiber structure (25) of which has an interruption (19) in the circumferential direction (u), characterized in that in the area of the interruption (19) of the continuous fiber structure (25) an insert (20) is integrated into the force introduction element (7). Load transfer component according to Claim 1 , characterized in that the interruption of the continuous fiber structure (25) in the circumferential direction (u) is a complete interruption of the continuous fiber structure (25). Load transfer component according to Claim 1 or 2 , characterized in that the casing (18) consists of two partial shells (15, 16), each of which comprises a part of the continuous fiber structure (25) and has a free end, the free ends of the partial shells (15, 16) in the area of the Interruption (19) are facing each other. Load transfer component according to one of the preceding claims, characterized in that the insert (20) sweeps over the interruption (19) of the continuous fiber structure (25) in the circumferential direction (u). Load transfer component according to one of the preceding claims, characterized in that the insert (20) is curved and the force introduction element (7) has a curved wall section (23) delimiting the recess (6) in which the insert (20) is provided. Load transfer component according to one of the preceding claims, characterized in that at least one through hole (21) penetrated by the plastic of the force introduction element (7) is provided in the insert (20). Load transfer component according to Claim 6 , characterized in that the through hole (21) is designed as an elongated hole and the force introduction element (7) consists of fiber-reinforced plastic. Load transfer component according to one of the preceding claims, characterized in that the insert (20) is bent outwards at its end regions (22) and / or that the insert (20) has a wavy contour or a concavo-convex contour at least in its end regions (22) Has shape. Load transfer component according to one of the preceding claims, characterized in that a joint or rubber bearing is arranged in the recess (6). Load transfer component according to Claim 9 , characterized in that a second of the force introduction areas (4) has a second force introduction element (9) which is provided with a second bearing receptacle in the form of a recess (8) and in which a joint or rubber bearing is arranged.

Images