DE102005019469A1 - Stabilizer for motor vehicle`s wheel suspension, has insert plastically deformed at oblate ends of hollow profile section to seal ends of section, where insert is made up of thermally processed material such as plastic material - Google Patents

Abstract

The stabilizer has a hollow profile section with oblate ends (2), and an insert (3) is plastically deformed at the ends for sealing the ends of the section. The insert is made up of a thermally processed material such as plastic material. The ends exhibit fastening openings perpendicular to its oblateness, where the openings are spaced apart from free edges of the ends. The section has a circular cross-section in a non-oblated area and extends over the entire length of the stabilizer. An independent claim is also included for a method for sealing a stabilizer.

Description

The The invention relates to a stabilizer for motor vehicles, the one Hollow profile section having a flattened end.

In stabilizers, which are designed for weight reasons partially or completely as a hollow profile, the initially hollow ends are often flattened so as to form a mounting flange for connection to the vehicle. For this purpose, the ends of the hollow profile are heated and pressed flat under pressure. A cross-sectional profile of such a flattened end is in 4 shown.

When flattening get the opposite inner walls of the hollow profile against each other in Appendix. Due to the resilience of the material, however, arise at the flattened ends 10 in the areas of greatest curvature small openings 11 which lead into the interior of the hollow profile. Through these openings 11 Moisture can penetrate the stabilizer and cause corrosion.

Around To protect such a stabilizer against internal corrosion is generally known to fill this with a corrosion protection oil. The Introducing the oil However, it is associated with a considerable effort. In addition, points the corrosion protection oil a limited lifespan. Another disadvantage of this type The corrosion protection consists in the poor recyclability of the oil.

In front this background, the invention is based on the object for a Stabilizer with at least one hollow profile section an alternative for protection to create against internal corrosion.

These Task is achieved by a stabilizer with the features of claim 1 solved, which is characterized in that mitformform in the flattened end of an insert is, which seals the end of the hollow profile section.

hereby are in the flattening in the area of maximum curvature often resulting openings sealed, so that the interior of the hollow profile section hermetically is completed. Because there is no moisture in the stabilizer can penetrate are additional activities for protection against internal corrosion, such as the filling with a corrosion protection oil not mandatory.

process engineering For this purpose, preferably the specified in claim 8 method Commitment. These will be in one end of the hollow profile section Insert made of a deformable material and then the End of the hollow profile section together with the therein Inserts are flattened, wherein the insert flows under deformation and the remaining interior in abgeplätteten Fills in the end.

further, advantageous embodiments of the invention are specified in the claims.

The Invention will now be described with reference to a drawing embodiment explained in more detail. The Drawing shows in:

1 a spatial view of a stabilizer according to an embodiment of the invention,

2 a sectional view through the flattened end of the stabilizer according to the invention,

3 a sectional view through the hollow profile section and the insert before the common deformation, and in

4 a sectional view accordingly 2 by a stabilizer according to the prior art.

The 1 to 3 show an example of a stabilizer according to the invention 1 for a suspension of a motor vehicle. Its ends 2 are each designed as mounting flanges for connection to the vehicle and flattened for this purpose.

In terms of a low component weight of the stabilizer 1 at least in sections from a hollow profile. Preferably, however, the entire stabilizer 1 made of a continuous piece of pipe whose ends 2 are flattened, so that the inner walls there are substantially against each other or at most slightly spaced from each other.

To protect against internal corrosion is in each flattened end 2 a depositor 3 mitverformt, the end 2 the associated hollow profile section 4 seals. In particular 2 can be removed, the deformed insert fills 3 in the area of the flattened ends 2 the remaining space between the inner walls of the deformed hollow profile, so that no moisture in the interior of the stabilizer 1 can get. In particular, the depositor fills 3 also by the resilience of the hollow profile sections 4 remaining larger gap gaps 5 between the inner walls in Be rich of the greatest curvature 6 the same completely.

Be as in 1 shown at the flattened end 2 one or more mounting holes 7 provided perpendicular to the flattening, so the insert extends 3 deeper into the end 2 of the hollow profile section 4 in, as the mounting holes 7 from the free end edge 8th the flattened end 2 are spaced.

In order to achieve a good seal, the depositor needs 3 be significantly softer than the material of the respective hollow profile section 4 ,

In an advantageous embodiment of the invention, the insert 3 plastically deformed.

Does the deformation of the ends 2 the hollow profile sections 4 under heat, so preferably an insert 3 made of a thermally processable material used.

In particular, inserts are suitable for this purpose 3 made of plastic materials.

For sealing the stabilizer 1 can, regardless of whether a single hollow profile section over the entire length of the stabilizer 1 extends or hollow profile sections 4 only in the area of the ends 2 are provided, proceed as follows.

In the or the ends 2 of the or the hollow profile sections 4 each becomes a depositor 3 ' made of a deformable material. The depositor 3 ' is tuned in its shape and dimensions to the expected residual dreams at the respective flattened end. He therefore takes in the undeformed state, only a portion of the hollow profile cross section at the end to be deformed 2 ' a, like this in 3 is shown.

To simplify the process, the depositor 3 ' further dimensioned so that this in the undeformed state in the end to be deformed 2 ' of the hollow profile section 4 is self-holding. In the embodiment shown here, the block-shaped insert is supported 3 ' between opposite inner wall portions of the hollow profile section 4 from.

After mounting the inserter 3 ' in the end to be deformed 2 ' the relevant hollow profile section 4 will be the end 2 ' together with the insert therein 3 ' deformed, wherein the force input preferably substantially perpendicular to the broad side of the insert 3 ' he follows. Here, the depositor flows 3 ' and fills the remaining interior in the flattened end 2 especially in areas 5 largest curvature 6 out. These areas 5 can through a very thin film of material of the insert 3 over the cross section of the flattened end 2 be connected to each other.

Instead of in 3 Cross-sectional profile shown, other profile shapes come into question. In all cases, however, all remaining spaces are within the flattened end 2 through material of the inserter 3 sealed filled. In addition, the hollow profile sections 4 have other cross-sectional shapes than the illustrated, circular cross-sectional shape.

1

stabilizer

2

flattened end

2 '

flattened end (before flattening)

3

depositors

3 '

depositors (before flattening)

4

Hollow section

5

clearance gap

6

largest curvature

7

fastening opening

8th

end edge

10

flattened end

11

opening

Claims (10)

Stabilizer for motor vehicles, comprising a hollow profile section ( 4 ) with a flattened end ( 2 ), characterized in that in the flattened end ( 2 ) an inserter ( 3 ) is mitverformt that the end of the hollow profile section ( 4 ) seals. Stabilizer according to claim 1, characterized in that the insert ( 3 ) is plastically deformed. Stabilizer according to claim 1 or 2, characterized in that the insert ( 3 ) consists of a thermally processable material. Stabilizer according to one of claims 1 to 3, characterized in that the insert ( 3 ) consists of a plastic material. Stabilizer according to one of claims 1 to 4, characterized in that the flattened end ( 2 ) perpendicular to its flattening one or more mounting holes ( 7 ) and that the depositor ( 3 ) deeper into the end of the hollow profile section ( 4 ) than the mounting holes ( 7 ) from the free end edge ( 8th ) of the flattened end ( 2 ) are spaced. Stabilizer according to one of claims 1 to 5, characterized in that the Hohlprofilab cut ( 4 ) in a non-flattened area ( 2 ) has a circular cross-section. Stabilizer according to one of claims 1 to 6, characterized in that the hollow profile section ( 4 ) over the entire length of the stabilizer ( 1 ) and at both ends ( 2 ) is flattened, with at each end ( 2 ) a sealing insert ( 3 ) is mitverformt. Method for sealing at least one hollow profile section ( 4 ) stabilizer ( 1 ), in which in one end of the hollow profile section ( 4 ) an inserter ( 3 ) is inserted from a deformable material and then the end ( 2 ) of the hollow profile section ( 4 ) together with the insert therein ( 3 ) is flattened, wherein the depositor ( 3 ) flows under deformation and the remaining interior in the flattened end ( 2 ). Method according to claim 8, characterized in that the insert ( 3 ) in the undeformed state only a portion of the hollow profile cross-section at the end to be deformed ( 2 ) occupies. Method according to claim 8 or 9, characterized in that the insert ( 3 ) in the undeformed state in the end to be deformed ( 2 ) is self-holding.