DE19720134B4 - suspension arm - Google Patents

Abstract

suspension arm, in particular transverse link, a motor vehicle, for transmission of forces and moments between a wheel carrier and a vehicle body or subframe, with at least two link bearings (1, 2, 3) for Linkage to the wheel carrier and the vehicle body or subframe, wherein the Radführungslenker formed of a metal as an extruded part is, characterized in that a Recess (7) in Radführungslenker for receiving a damper is formed substantially perpendicular to the extrusion and a cutting direction of the recess in substantially the same Direction runs like the cut for cutting out the handlebar.

Description

The The invention relates to a Radführungslenker for a motor vehicle according to the generic term of claim 1 and to a method for producing a Radführungslenkers according to the generic term of claim 10.

suspension arm serve for the transmission of forces and optionally also torsional and bending moments between the wheel carriers of a vehicle and the vehicle body or one with the vehicle body connected subframe. The forces be over transmit the wheel control handlebars, depending on the arrangement in the vehicle between transverse, longitudinal and semi-trailing arms can be distinguished. The respective handlebars must accordingly for the transmission the occurring during braking, acceleration and compression procedures high forces be suitable. They are hinged at their respective ends, usually via rubber-metal bearings, on the wheel carrier and the vehicle body or subframe attached.

suspension arm are made accordingly from a metal, usually as a forged or diecasting. In addition to steel, light metal is increasingly being used, to the aspired lightweight construction in modern motor vehicle construction as well in the area of the suspension to reach.

The DE 41 38 373 A1 describes a strut mount of a vehicle body, wherein the free ends of aluminum extruded profile supports are received by a strut side bearing block, wherein on the bearing block, the damper, a spring and a Radführungslenker are pre-assembled. However, the Radführungslenker is not made of an extruded.

From the DE 42 41 879 A1 is a trained as an extruded part, a plurality of steering bearing exhibiting Radführungslenker according to the preamble of claim 1 known.

In a prospectus of NedCar BV, at the Geneva Motor Show 1996 is also a Radführungslenker according to the preamble of claim 1, which consists of an extrusion made preform is cut out.

Such Radführungslenker allow a simple and cost-effective production, in particular of a light metal, by two steps, namely an extrusion process and a subsequent cutting process. In this case, an extrusion can be produced with respect to a forging or casting with high manufacturing accuracy. However, the Radführungslenker thus prepared do not allow the attachment of a damper at its top, so that this requires the use of additional cost-increasing components, such. B. a bearing block as in the DE 41 38 373 A1 , necessary is.

Of the Invention is therefore the object of a Radführungslenker to create, for a cost-effective and with high manufacturing accuracy and on the other hand the inclusion of further components, in particular a damper without too big Effort through additional Components or tools allows. Furthermore, a method for producing such a Radführungslenkers be created.

These Task is by a Radführungslenker according to claim 1 and a method for producing a Radführungslenkers solved according to claim 10. The dependent claims describe preferred developments of the Radführungslenkers invention.

By doing according to the invention a recess in the wheel control handlebars cut in, z. B. milled is, may be a central or central recording of a damper the wheel control handlebar be easily ensured by the cutting guide to the Cut out the wheel control arm from the extrusion is used at the same time, the corresponding recess for Recording the damper train. The Radführungslenker invention can thus continue to be manufactured with high manufacturing accuracy be and is suitable for receiving a Radführungslenkers, without that this consuming Additional measures or additional complex and cost-increasing components necessary.

Of the suspension arm can in particular according to claim 2 made of a light metal become. Due to the arrangement of bearing eyes according to claims 7 to 9 can be on more aids for the articulated connection of the damper and optionally be dispensed with the stabilizer, wherein at the subdivision of a bearing eye according to claim 9 a particularly stable articulation of the damper or stabilizer results.

The The invention is described below with reference to an embodiment with reference to the attached Drawings closer explained. Show it:

1 a perspective view of a Radführungslenkers according to an embodiment of the invention;

2 a side view of the Radführungslenkers 1 ,

A wishbone has a top flange 11 and a bottom strap 12 on, between which a ribbing 10 is formed in a zigzag shape. For articulation on the wheel and the vehicle body bearing eyes 2 and 3 respectively. 1 educated.

Since the wishbone three bearing eyes 1 . 2 . 3 has, it is suitable for the transmission of bending moments and torsions.

The wishbone is made by first a preform made of a light metal, for. As aluminum, magnesium or an aluminum or magnesium alloy is produced by extrusion and then the individual control arms are cut out of this preform. The extrusion direction, ie the flow direction of the metal during extrusion is in 1 marked with an arrow F. The cutting direction is substantially perpendicular to the flow direction F, the wishbone can learn by a suitable cut a broadening in the areas where it is exposed to special loads, such. B. the support surface for a spring 8th on his upper girth 11 , Due to this manufacturing method, the wishbone only has surfaces that run along the flow direction F, but no thrust surfaces in another direction.

According to the inclusion of a damper on the upper side of the transverse link is made possible by the handlebar is cut in a corresponding manner. This is a recess 7 in the upper girth 11 worked out, z. B. milled out, and continued the cutting guide in the inner region of the handlebar. Because the ribbing 10 by a corresponding cut with the cut of the recess 7 in a direction substantially perpendicular to the flow direction F and perpendicular or oblique to the surface of the upper belt 11 , which extends into the interior of the wishbone, would be greatly weakened, it is in the area of the cutting guide below the recess 7 through an intermediate ribbing 9 replaced, with which a honeycomb-like structure is achieved. This honeycomb-like structure becomes a bearing eye 4 for receiving the damper and a bearing eye 5 created for receiving a stabilizer.

The upper strap 11 is still for receiving a spring 8th to 2 suitable, wherein it is in the region of the bearing surface of the spring 8th can be widened accordingly to ensure here sufficient strength to absorb the forces introduced via the spring.

The cutting guide for the recess 7 as well as the cut in the area of the intermediate ribbing 9 is substantially perpendicular to the flow direction F and thus parallel or substantially parallel to the sides of the control arm, so that the process of cutting the wishbone and the cutting of the recess 7 can be done in one operation.

Claims (10)

Radführungslenker, in particular wishbone, a motor vehicle, for transmitting forces and moments between a wheel and a vehicle body or subframe, with at least two link bearings ( 1 . 2 . 3 ) for articulation to the wheel carrier and the vehicle body or subframe, wherein the Radführungslenker is formed of a metal as an extruded part, characterized in that a recess ( 7 ) is formed in the Radführungslenker for receiving a damper substantially perpendicular to the extrusion and a cutting direction of the recess extends in substantially the same direction as the cut to cut the handlebar. suspension arm according to claim 1, characterized in that it consists of a light metal is made. suspension arm according to claim 1 or 2, characterized in that the handlebar longitudinal direction (L) perpendicular to the extrusion direction runs. Radführungslenker according to one of claims 1 to 3, characterized in that the bearing eyes ( 1 . 2 . 3 ) of the arm bearing extend coaxially to the extrusion direction. Radführungslenker according to one of claims 1 to 4, characterized in that it has three bearing eyes ( 1 . 2 . 3 ) for receiving and transmitting bending forces and torsions. Radführungslenker according to one of claims 1 to 5, characterized in that it has a top flange ( 11 ) and a lower flange ( 12 ), between which a ribbing ( 10 ) is trained. Radführungslenker according to one of claims 1 to 6, characterized in that a preferably honeycomb-like structure is formed in the ribbing and a La gerauge ( 4 ) is formed for receiving a damper in the structure such that the bearing eye is coaxial with the extrusion direction. Radführungslenker according to claim 7 or 8, characterized in that in the structure another bearing eye ( 5 ) is designed to receive a stabilizer. Radführungslenker according to claim 7 or 8, characterized in that a bearing eye or both bearing eyes ( 4 . 5 ) through the recess ( 7 ) in two bearing sleeves ( 4a . 4b ) is divided or are. Method for producing a wheel guide arm, in particular a wheel guide arm according to one of Claims 1 to 9, in which a preform is extruded from a metal and the wheel guide arm is subsequently cut out of the preform, the cutting direction being essentially perpendicular to the extrusion direction of the metal, characterized that a recess ( 7 ) in substantially the same direction as the cutting guide for cutting the Radführungslenkers is cut out of the preform.