DE102004042964A1 - Pendulum support made of an extruded profile - Google Patents

Abstract

The invention relates to a pendulum support for a motor vehicle according to German Patent Application 10228370.2. In particular, the invention relates to a pendulum support for a motor vehicle, with an elongated base body (1) which is connectable via at least one fastening element (2) with automotive components, wherein the base body (1) is a hollow extruded profile made of plastic.
According to a first variant, the fastening element (2) is formed integrally with one of the motor vehicle components (B).
According to a second variant, the fastening element (2) has a screw and a dowel inserted into the base body, wherein the screw of one of the motor vehicle components (B) passes through and is screwed into the dowel.

Description

The The invention relates to a pendulum support for a Motor vehicle according to the German patent application 10228370.2. Especially The invention relates to a pendulum support for a motor vehicle with a elongated Body, the over at least one fastener with automotive components connectable is.

Pendulum supports serve in the automotive sector, for example, for connecting a roll stabilizer to a wheel carrier or to a handlebar, the pendulum supports a high dynamic load capacity should have simultaneous corrosion resistance. Pendulum supports are it in different embodiments, being a regular elongated body have, provided at the two ends of each joint is.

Pendulum supports off The car area are nowadays made of metal or plastic, wherein the metallic components in contrast to the plastic components are relatively heavy. The advantage of a metallic pendulum support exists However, in that the joint with the body by a simple connection method, such as B. friction welding, can be connected, so it's pretty easy to check the length of the pendulum supports to vary by the main body according to the required Cut length or sawed becomes. The change the length made of plastic pendulum supports causes high Costs, as for the regularly as Injection moldings manufactured basic body a new injection mold must be created. Furthermore, after the injection molding process manufactured plastic pendulum supports Weld lines on, so that the component dimensioned larger must be the weak points caused by these weld lines compensate.

task The invention is a pendulum support of the aforementioned To create kind, which has a low weight, during the Production cost-effective to different lengths can be adjusted, is simple in its construction and is easy can be mounted.

These The object is achieved according to the invention first variant by a pendulum support with the features after Claim 1 and according to a second variant by a pendulum support the features of claim 10 solved. Preferred developments are in the subclaims described.

The Pendulum support according to the invention for a motor vehicle according to the first Variant has an elongated body up, over at least one fastener connected to motor vehicle components can be, being the main body is a hollow extruded plastic. The fastener is in one piece formed with one of the motor vehicle components.

The inventive pendulum support is simple in their construction and thus inexpensive to produce. The length of the Stabilizer can be varied without difficulty as the extruded profile or extrusion profile easily by means of suitable tools, such. A saw, by sawing of the basic body shortened is. Due to the advantageous manufacturing method of the body has this no tie lines due to, inter alia, due to the injection molding process of enclosing originate from cores. This results in comparable dimensions a higher one stability achieved, so that the pendulum support overall, it can be built more easily with the same characteristics.

Around a higher one To achieve strength, the main body is preferably made of a reinforced plastic produced. A pendulum support made in this way can transmit high tensile and compressive forces, at the same time high buckling loads can be absorbed. conditioned through the chosen one Extrusion can be made with a machine of different length base body, which the production costs remain low. Further, in the extrusion process in the plastic introduced reinforcing fibers in the loading direction aligned.

Especially just lets assemble the pendulum support according to the invention, when the fastener to the body via a snap connection form-fitting connected is. Therefore the fastening element can have a hollow-cylindrical area, formed on the inner wall at least one recess or projection that is with one on the outer wall of the the body trained projection or return is engaged, wherein the main body in the fastener used or snapped.

Preferably, however, the base body has on its inner wall at least one recess into which a protrusion provided on the outer circumference of the fastening element engages in a form-fitting manner, wherein the fastening element is inserted or snapped into the base body. The recess may be rectangular and the projection may be sawtooth-shaped, wherein the steep edge of the sawtooth-shaped projection the one Vehicle component faces.

It but it is also possible that the main body has at least one projection on its inner wall, the in one on the outer circumference of the body inserted fastener provided recess positively engages. In this case, the wall of the main body for forming the projection is preferred formed by a material deformation in the recess, which is performed after insertion of the fastener in the body. This forming can be done using conventional plastic forming techniques carried out be, in particular using mechanical energy and Ultrasound or thermal energy.

Instead of a plastic snap connection, but the fastener also over an adhesive bond or a plastic welded connection cohesively the main body be connected.

According to the second Variant of the invention, a pendulum support for a motor vehicle is provided, the one oblong body that has over at least one fastener connected to motor vehicle components can be, being the main body is a hollow extruded plastic. The fastener has a screw and a used in the body Dowel up, wherein the screw passes through one of the motor vehicle components and screwed into the dowel is. The second variant of the pendulum support according to the invention is simple in their construction and thus inexpensive to produce. Further are the same by choosing a hollow extruded profile Plastic resulting benefits exist as with the first Variant.

at high loads the pendulum support can it makes sense to connect the main body and fastener with an additional anti-twist device equip. You can do this the fastener and the body at least in the connection area a non-circular, z. B. have an oval or a rectangular cross-section. Under connection area is to be understood the area where Fastener and body mesh.

Around a transmission to reduce vibrations between fastener and body, can be used for vibration damping between the fastening element and the base body an elastic element made of thermoplastic elastomer (TPE) or thermoplastic urethane (TPU) or rubber. This elastic element can simultaneously cause a tolerance compensation, if the main body or the fastener for manufacturing reasons easily from their ideal measurements differ. As thermoplastic elastomers z. B. thermoplastic elastomers ester-based (TPEE) and styro-based thermoplastic elastomers (TPES) known.

To the Adjusting buckling loads to be absorbed by the pendulum support can be inflated by a blow molding process, the center of the body become. This ensures that the body at its end a smaller diameter with a greater wall thickness than in has middle region lying between the end regions, which by its larger diameter has a larger area moment of inertia and thereby higher Can absorb buckling loads.

Indeed it is also possible on the inner wall and on the outer wall of the main body, respectively one in the longitudinal direction running wavy Provide profile, wherein one of the wave-shaped profiles preferably one return always forms in those places of the wall, at which the other wave-shaped profile forms a projection. It can itself the wave-shaped Profiles only about a part or over the entire length of the basic body extend.

There a pendulum support regularly to Connecting relatively movable components is used, is the main body over that Fastener preferably connected to a hinge. Frequently becomes used a ball joint, wherein the fastener in this Case simultaneously form the ball joint housing or integral with this can be formed. But it is also possible, instead of the ball joint to use a rubber bearing, which is also a in the automotive field is widely used component.

The Pendulum support according to the invention has the Advantage on that the main body depending on the requirement in cheaper Way with other geometric dimensions can be produced, whereas which is a motor vehicle component, such. B. a ball joint, for different Applications can be identical. That's why it's possible that Fastening element together with the one motor vehicle component in high quantities to produce, since fastener and motor vehicle component independently from the main body and thus independent be manufactured by different application and use purposes can. this leads to to a considerable storage space and cost savings.

The invention will be described below with reference to preferred embodiments described on the drawing. In the drawing show:

1 a longitudinal section through a pendulum support according to the invention according to a first embodiment;

2 Two variants of a cross section taken along the line AA 'of 1 apparent embodiment;

3 a longitudinal section through a pendulum support according to the invention according to a second embodiment;

4 : The representation of a longitudinal section of a part of a fastener for the embodiment according to 3 according to a second variant;

5 a longitudinal section through a pendulum support according to the invention according to a third embodiment;

6 a longitudinal section through a pendulum support according to the invention according to a fourth embodiment;

7 an extrusion profile for the production of the base body in the uninflated state; and

8th : the extruded profile forming the main body in the inflated state.

Out 1 is a longitudinal section through a first embodiment of the pendulum support according to the invention can be seen, wherein in a main body 1 a fastener 2 is used. The fastener 2 is integrally formed with an annular housing G of a ball joint B, wherein in the housing G with the interposition of a bearing shell L a ball pin K is arranged rotatably and slidably. In this case, a sealing bellows D is arranged between the ball stud K and the bearing shell L or the housing G.

The main body 1 has a first front end 1a (please refer 8th ), a middle range 1b (please refer 8th ) of larger diameter and a second front end 1c in which the fastener 2 is used. In the area of the second front end 1c are circumferential recesses or grooves 1d on the inner wall of the main body 1 formed between which lateral boundaries 1e for the recesses or grooves 1d are formed.

A first massive area 2a of the fastener 2 extends through the second front end 1c in the body 1 trained cavity 1f into it. On the outer circumference of the first area 2a are sawtooth projections 2 B formed, which in the circumferential recesses or grooves 1d engage and aligned with their steep edge to the component B out. The lateral limits 1e grab it in between the projections 2 B existing spaces 2c a, creating an overall secure connection between the main body 1 and the fastener 2 is trained.

Due to the sawtooth configuration of the projections 2 B can the fastener 2 or the integrally formed with this component B easily into the body 1 be snapped, with a release of the component B from the main body 1 due to the sawtooth-shaped protrusions 2 B formed barbs without destroying the body 1 or the fastener 2 is no longer possible.

In the area of the second front end 1c the housing G forms a collar-shaped stop 2e , between this and the second front end 1c an elastic element 3 can be provided for vibration damping and tolerance compensation (see 3 ).

To a twisting of the ball joint B relative to the main body 1 To prevent, are the cross-sectional areas of the body 1 and the fastener 2 at least in the area of the second front end 1c not circular. Out 2 is a cross section of the pendulum support along the section AA 'visible, with two variants are shown for the cross-sectional shape. According to a first variant, both the basic body 1 as well as the fastener 2 in the connection area on a rectangular cross section, whereas the main body 1 and the fastener 2 according to the second variant have an oval cross-section. In both variants, a rotation of the ball joint B relative to the main body 1 safely prevented.

Out 3 is a longitudinal section through a second embodiment of the pendulum support according to the invention can be seen, wherein the main body 1 in the area of his second front end 1c in one in the first area 2a of the fastener 2 trained undercut 2m with a molding or with a projection 1 positively engages. Unlike the first embodiment, the positive connection is not by snapping the fastener 2 into the main body 1 achieved, but by material deformation of the wall of the body 1 after the fastener 2 into the main body 1 is used. The reshaping of the basic body 1 in the area of his second front end 1c takes place while using of mechanical energy and ultrasound or thermal energy, the projection 1i is formed only by this forming process.

Out 4 is a second variant of the fastener 2 for the second embodiment, wherein in the first region 2a several projections 2 B and intermediate spaces 2c are provided. Also according to the second variant of the main body 1 in the area of his second front end 1c by a forming process form-fitting in the interstices 2c molded, with the projections 2 B in the inner wall of the body 1 intervention.

Further, in the second embodiment, the 2 be provided apparent rotation.

Out 5 is a longitudinal section through a third embodiment of the pendulum support according to the invention can be seen, wherein the outer periphery of the first region 2a of the body 1 used fastener 2 over an adhesive 4 cohesively with the inner wall of the body 1 connected is.

The first three embodiments have the common feature that the fastener 2 is formed integrally with the housing G of the component B.

Out 6 is a longitudinal section through a fourth embodiment of the pendulum support according to the invention can be seen, wherein a dowel 5 made of plastic in the cavity 1f of the basic body 1 in the area of the second front end 1c is used. For axial fixation, the dowel 5 a collar 6 on, the second front end 1c of the basic body 1 is applied. In the annular housing G of the ball joint B is a bore 7 provided, through which a screw 8th in the dowels 5 extends into and is screwed into this. For axial fixation, the screw 8th a screw head 9 larger diameter, with the screw head 9 is inserted in the inner wall of the housing G and does not protrude beyond this.

While screwing in the screw 8th in the dowels 5 the dowel widens 5 in a widening area 10 and lays firmly on the inner wall of the body 1 at. As the main body 1 and thus also the dowel 5 at the widening area 10 a larger diameter than in the area of the front end 1c have, is a fixed and positive connection of ball joint B and body 1 given.

Also in this embodiment, the 2 be provided apparent rotation.

Out 7 is an extrusion profile 11 it can be seen that for the manufacture of the main body 1 is used. The setting of the length of this profile 11 , which is also the length of the later basic body 1 determined, is cost-effective, since the extrusion profile 11 can easily be cut to the desired length. Thereafter, the cut extruded profile 11 be subjected to a blow forming.

8th shows the inflated by blow molding extrusion profile, which now the main body 1 forms. As can be seen from the figure, the diameter of the main body 1 in the middle area 1b larger than in the area of the first and the second front end 1a respectively. 1c , being about the diameter in the middle range 1b Among other things, the buckling loads are adjustable, which is the basic body 1 can record. Furthermore, the wall of the main body 1 in the region of the first and the second front end 1a respectively. 1c a greater thickness than in the middle region, which is ideal for introducing forces.

Also a twisting of the two front ends 1a and 1c against each other about the longitudinal axis of the body 1 can in a simple way z. B. during blow molding in the middle region 1b will be realized. This twisting can, for example, non-circular cross sections in the areas of the front ends 1a and 1c for forming different orientations of the body 1 used fastened components. The tool required for this can be kept very simple and therefore cost-effective, since the pressures during extrusion are very low.

How out 8th can be seen, the main body 1 in the area of his second front end 1c on its outer wall encircling recesses or grooves 1g on, between which lateral boundaries 1h are formed. This design of the outer wall, it is also possible to form a snap connection with a hollow cylindrical fastener, in which the main body 1 with his second front end 1c intervenes.

1

body

1a

first Front end of the main body

1b

middle Area of the body

1c

second Front end of the main body

1d

encircling Returns or Grooves on the inner wall of the

the body

1e

lateral Limitations of the recesses or Grooves of the main body at the

inner wall

1f

continuous Cavity of the body

1g

encircling Returns or Grooves on the outer wall of the basic body

1h

lateral Limitations of the recesses or Grooves of the main body at the

outer wall

1i

indentation or lead

2

fastener

2a

First, the projections, the recesses or the Undercut or the glue

comprising Direction Area of the fastener

2 B

Projections of the fastener

2c

gap between the projections

2e

Attack, formed by the fastening element or ball joint housing

2m

undercut or return or groove

3

elastic element

4

adhesive

5

dowel

6

collar

7

drilling

8th

screw

9

screw head

10

widening range

11

extrusion profile

B

component

G

annular housing

L

bearing shell

K

ball pin

D

bellows

Claims (19)

Pendulum support for a motor vehicle according to the German patent application 10228370.2, with an elongated body ( 1 ), which via at least one fastener ( 2 ) is connectable with motor vehicle components, characterized in that the basic body ( 1 ) is a hollow extruded profile made of plastic and the fastening element ( 2 ) is integrally formed with one of the vehicle components (B). Pendulum support according to claim 1, characterized in that the fastening element ( 2 ) via a snap connection form-fitting with the main body ( 1 ) connected is. Stabilizer according to claim 1 or 2, characterized in that the fastening element has a hollow cylindrical portion, on the inner wall at least one return or projection is formed, which with one on the outer wall of the basic body trained projection or return engaged. Pendulum support according to claim 1 or 2, characterized in that the basic body ( 1 ) on its inner wall at least one return ( 1d ), in which a on the outer circumference of the fastener ( 2 ) provided projection ( 2 B ) engages positively. Pendulum support according to claim 4, characterized in that the return ( 1d ) rectangular and the projection ( 2 B ) is saw-tooth-shaped, wherein the steep flank of the saw-toothed projection ( 2 B ) facing a vehicle component (B). Pendulum support according to claim 1 or 2, characterized in that the basic body ( 1 ) on its inner wall at least one projection ( 1i ), which in one on the outer circumference of the fastener ( 2 ) provided for return ( 2m ) engages positively. Pendulum support according to claim 6, characterized in that the projection ( 1i ) by reshaping the wall of the body ( 1 ) after insertion of the fastener ( 2 ) in the basic body ( 1 ) and in the return ( 2m ) is formed. Stabilizer according to claim 7, characterized in that the forming under Use of mechanical energy and ultrasound or thermal Energy is done. Pendulum support according to claim 1, characterized in that the fastening element ( 2 ) via an adhesive bond ( 4 ) or a plastic welded connection cohesively with the main body ( 1 ) connected is. Pendulum support for a motor vehicle according to the German patent application 10228370.2, with an elongated body ( 1 ), which via at least one fastener ( 2 ) is connectable with motor vehicle components, characterized in that the basic body ( 1 ) is a hollow extruded profile made of plastic and the fastening element ( 2 ) a screw ( 8th ) and one in the main body ( 1 ) used dowels ( 5 ), wherein the screw ( 8th ) of one of the motor vehicle components (B) passes through and into the dowel ( 5 ) is screwed. Pendulum support according to one of the preceding claims, characterized in that for forming an anti-rotation device, the fastening element ( 2 ) and the basic body ( 1 ) have at least in the connecting region an oval or a rectangular cross-section. Pendulum support according to one of the preceding claims, characterized in that for vibration damping and tolerance compensation between the fastening element ( 2 ) and the Basic body ( 1 ) an elastic element ( 3 ) is arranged from a thermoplastic elastomer or rubber. Pendulum support according to one of the preceding claims, characterized in that the basic body ( 1 ) by blow molding at its end regions ( 1a . 1c ) has a smaller diameter with a greater wall thickness than in the intermediate region between the end regions ( 1b ) having. Pendulum support according to one of the preceding claims 1 to 12, characterized in that the basic body ( 1 ) has on its inner wall and on its outer wall in each case a longitudinally extending wave-shaped profile. Stabilizer according to claim 14, characterized in that one of the wave-shaped profiles a return always in those places of the wall, where the other wave-shaped profile has a projection. Pendulum support according to claim 14 or 15, characterized in that the wave-shaped profiles over the entire length of the base body ( 1 ). Stabilizer according to one of the preceding claims, characterized in that the one motor vehicle component (B) is a ball joint. Pendulum support according to claim 17, characterized in that the ball joint has a ball joint housing (G), which by the fastening element ( 2 ) is formed or formed integrally therewith. Stabilizer according to one of the preceding claims 1 to 16, characterized in that a vehicle component (B) is a rubber bearing.