DE102017123112A1 - Front axle for a motor vehicle - Google Patents

Abstract

The invention relates to a front axle (1) for a vehicle, in particular a motor vehicle with a cross member (2) and laterally molded support brackets (3, 4), wherein cross member (2) and support brackets (3, 4) integrally formed as an extruded profile and Essentially over its entire surface with at least one stiffening element (5, 6) are connectable.

Description

The invention relates to a front axle for a vehicle, in particular a motor vehicle with a cross member and laterally molded support brackets.

Such Vorderachsträger - including other referred to as subframe or subframe - are used to accommodate particular Radführungslenkern and other aggregates or auxiliary units of motor vehicles. They are attached to the vehicle body of the motor vehicle.

At such Vorderachsträger high demands are made in particular with regard to stiffness, vibration susceptibility, crash behavior and weight.

From the prior art, a variety of designs of Vorderachsträger and method for their preparation is known. The DE 100 52 940 A1 shows and describes a front axle, which is constructed essentially of a tubular cross member and an integrally formed thereon and extending over its entire length reinforcing portion.

The DE 10 2009 043 474 A1 discloses a front axle for a motor vehicle, which is constructed as a double-walled extruded profile in L-shape with laterally bolted or welded brackets for attachment to the vehicle and with recordings for wheel bearing.

The DE 10 2014 113 565 A1 shows and describes a front axle consisting of a substantially horizontal portion and a substantially vertical portion, in which the two sections are connected by a arranged above the steering gear stiffening element.

The DE 10 2013 108 695 A1 discloses a front axle carrier constructed of an upper and a lower interconnected shells, whose attachment point for the motor mount is stiffened with a stiffening element inserted into the shell.

In the WO 2011 003 388 A1 is shown and described in one piece cast front axle, in which a separately prepared from the casting tube for stiffening material, force and / or positively on and / or attached.

Object of the present invention is to improve known from the prior art constructions of front-end carriers in terms of crash behavior, vertical and horizontal stiffness, vibration damping and weight on.

According to the invention, this object is achieved in that a front axle with cross member and integrally molded support brackets formed as a casting and with at least one, substantially over the entire surface of the front axle carrier extending absorber element is modularly connected.

The at least one absorber element may preferably be screwed to the cross member and / or to the support brackets and / or be riveted and / or welded fastened.

With regard to rigidity, deformation and vibration immunity, a particularly preferred embodiment of the invention is seen in that the or the absorber elements can be inserted positively in recesses in the cross member and / or in the support brackets and so inserted screwed and / or vernietbar and / or weldable.

The consisting of cross members and support brackets, integrally constructed front axle should preferably have a substantially U-shaped profile, the cross member should preferably be arranged vornelegend in the direction of travel. In this case, a first absorber element can be arranged running substantially over the entire width of the cross member and a second approximately bow-shaped stiffening element to be arranged following the U-profile of the cross member and support brackets. Absorber element or stiffening elements and cross member and support brackets are assembled modular and preferably screwed together and / or riveted.

The material used for the stiffening elements is steel, possibly high-strength steels. For reasons of weight, it is conceivable to produce one or both of the absorber elements of fiber-reinforced plastic.

Advantages, features and details of the inventive solution for a front axle will become apparent from the following description of schematically illustrated embodiments in the figures of a drawing. The features and feature combination described, as shown below in the figures of the drawing, and described with reference to the drawings features and combinations of features are applicable not only in the combination, but also in other combinations or in isolation, without causing the scope of the Is left invention.

• 1 einen Vorderachsträger mit Querträger und angeformten Tragekonsolen in U-Form;
• 2 ein erstes Absorberelement für einen Vorderachsträger nach der Erfindung;
• 3 in perspektivischer Ansicht den um 180 Grad gedreht dargestellten Vorderachsträger nach 1 mit einem daran angebrachten Versteifungselement nach 2;
• 4 ein zweites bügelförmiges Versteifungselement und
• 5 einen Vorderachsträger mit zwei daran angebrachten Versteifungselementen nach der Erfindung.

It shows:

• 1 a front axle with cross member and molded support brackets in U-shape;
• 2 a first absorber element for a front axle according to the invention;
• 3 in perspective view the front axle carrier rotated by 180 degrees 1 with a stiffening element attached to it 2 ;
• 4 a second bow-shaped stiffening element and
• 5 a front axle with two stiffening elements attached thereto according to the invention.

1 shows the top view of a front axle 1 with a crossbeam 2 and on this integrally molded support brackets 3 and 4 , front axle 1 or cross member 2 and carrying brackets 3 respectively. 4 are preferably formed as a casting. crossbeam 2 and support brackets 3 and 4 have a substantially U-shaped profile, wherein the cross member 2 Preferably seen in the direction of travel vorneliegend is arranged in the vehicle.

In particular, in this arrangement and embodiment of a front axle 1 proposes the invention, essentially over the entire extension of the cross member 2 and possibly also over parts of the carrying consoles 3 and 4 an absorber element 5 to arrange. This absorber element 5 can with the cross member 2 or with the carrying brackets 3 and 4 bolted and / or riveted connected. To increase the rigidity and to optimize the vibration behavior or to dampen vibrations as far as possible, the absorber element 5 positive locking in formations in the cross member 2 or in the carrying brackets 3 respectively. 4 be inserted (see 3 - across from 1 shown in perspective and rotated by 180 degrees).

To be able to achieve a further increase in stiffness and an improvement in crash behavior, for example, in particularly heavy vehicles or vehicles that are subject to particularly high stress, is proposed in the invention, another stiffening element 6 provided. This stiffening element 6 may preferably have a bow-like shape with the U-profile of the front axle 1 essentially corresponds.

3 and 5 show the modular structure of a front axle 1 according to the invention with bolted to him and / or riveted and / or welded attached stiffening elements 5 (please refer 3 ) or 5 and 6 (see 5 ). Also the stiffening element 6 can form fit in recesses in the cross member 1 or in the carrying brackets 3 respectively. 4 inserted and then bolted and / or riveted to be connected.

The absorber element (s) 5 are preferably sheets or profiles formed of ductile aluminum or steel. In the event of a crash, they can absorb energy in the form of plastic deformation and protect the casting from damage or excessive force.

The stiffening element ( 6 ) is designed to maintain integrity in the event of a crash.

This modular design of a front axle with stiffening elements not only high stability and rigidity is achieved. With appropriate choice of material, the vibration behavior can be at least optimized or vibrations are largely attenuated. In particular, however, the crash behavior is significantly improved by the modular design of the front axle in terms of energy reduction, etc.

As material for the or the stiffening elements according to the invention preferably offers steel, especially high-strength steels. For reasons of weight and possibly also with regard to the vibration behavior, it is conceivable to produce one or possibly also both stiffening elements made of fiber-reinforced plastic.

LIST OF REFERENCE NUMBERS

1

front axle

2

crossbeam

3

carrying console

4

carrying console

5

absorber element

6

stiffener

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 10052940 A1 [0004]
• DE 102009043474 A1 [0005]
• DE 102014113565 A1 [0006]
• DE 102013108695 A1 [0007]
• WO 2011003388 A1 [0008]

Claims (10)

Front axle (1) for a vehicle, in particular a motor vehicle with a cross member (2) and laterally molded support brackets (3, 4), characterized in that cross member (2) and support brackets (3, 4) integrally formed as a casting and substantially over their entire surface with at least one absorber element (5, 6) are connectable. Front axle according to Claim 1 , characterized in that the or the absorber element / s (5, 6) on the cross member (2) and / or on the support brackets (3, 4) screwed and / or riveted fastened is / are. Front axle according to Claim 1 , characterized in that the one or more absorber element (s) (5, 6) can be inserted into formations in the cross member (2) and / or in the carrying brackets (3, 4) and can be fastened there screwed and / or riveted and / or welded /are. Front axle according to Claim 1 , characterized in that the cross member (2) and carrying brackets (3, 4) have a substantially U-shaped profile, wherein a first absorber element (5) substantially over the cross member (2) can be arranged extending Front axle according to Claim 1 , characterized in that a second stiffening element (6) in approximately bow-shaped the U-profile course of cross member (2) and carrying brackets (3, 4) can be arranged following. Front axle according to Claim 1 , characterized in that the absorber element (5) and stiffening element (6) and cross member (2) and carrying brackets (3, 4) screwed together and / or riveted and / or welded. Front axle according to one of the preceding claims, characterized in that the / the stiffening / e (6) are made of steel. Front axle according to one of the preceding claims, characterized in that at least one of the absorber elements (5, 6) is made of fiber-reinforced plastic. Front axle according to one of the preceding claims, characterized in that the absorber element (5) made of ductile aluminum or steel is formed. Motor vehicle with a front axle carrier (1) according to one of the preceding claims.

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