DE102006055294A1 - Independent wheel suspension for rear wheel of motor vehicle, has guide bearing, and adjustment mechanism for adjusting relative distance between driving position of wheel guider and wheel carrier, in vehicle transverse direction - Google Patents

Abstract

The suspension (1) has a wheel guider (2) that is guided by a guide bearing (6) at a wheel carrier (7), in a drive position. The guide bearing is provided with an adjustment mechanism that is actuated by an actuator e.g. electromechanical or electrohydraulical actuator. The adjustment mechanism adjusts a relative distance between the driving position of the wheel guider and the wheel carrier, in a vehicle transverse direction (y). The actuator is integrated in the guide bearing. The wheel carrier is pivoted by the wheel guider at a vehicle sub-structure.

Description

The The present invention is in the field of suspension technology and relates to an independent suspension for a Rear wheel of a motor vehicle.

State of the art

In a conventional one independent suspension can through the use of a hinged on the wheel guide arm the track of the rear wheel when rebounding and rebounding, as well as when it occurs of longitudinal and lateral forces be specified. The track adjustment depends in particular from the axle geometry and the forces acting on the rear wheel.

generally known can by the track adjustment of the rear wheels, the self-steering behavior of the motor vehicle, so that the vehicle in particular while cornering or when braking is stabilized. For example may indicate the occurrence of vehicle instability under load changes or at a braking on a roadway with different coefficients of friction counteracted by the fact that the rear wheels when driving straight or cornering be brought into toe.

In In practice, it is necessary to the track control caused by track control the rear wheels to adapt certain, typically occurring driving situations, as exemplified above. However, in different driving situations, especially at a different driving speed, the driving experience and / or driving safety through the track adjustment in unwanted Way impaired become.

Around To avoid this problem, an "active" track adjustment is necessary because a "passive" track adjustment means a tracking link no driving situation-dependent, in particular speed-dependent, variability of the track adjustment allowed.

task

In contrast there is the object of the present invention is an independent suspension for a motor vehicle for multiple articulation of a wheel carrier on a vehicle chassis, possibly with the interposition of a subframe, available in which the disadvantages set out above do not occur and a driving-dependent, especially speed-dependent, Track adjustment of the rear wheel is possible.

These Task is according to the proposal of the invention by an independent suspension for a motor vehicle with the features of the independent claim solved. Advantageous embodiments of the invention are characterized by the features the dependent claims specified.

According to the invention is a independent suspension for a Motor vehicle shown which of the Mehrfachanlenkung a rear wheel carrier a vehicle body of a vehicle body, if necessary with the interposition of a subframe serves.

In the independent suspension according to the invention is a Radlenker at a pivot point by means of a link bearing the wheel carrier articulated, wherein the link bearing with an actuated by an actuator Adjusting mechanism together menwirkt or is provided by which for the purpose of a track adjustment of the wheel carrier, a relative distance in Vehicle transverse direction between the articulation point (and optionally the link bearing) of the Radlenkers and the wheel carrier is adjustable.

at The actuator may be, for example, an electro-mechanical or electro-hydraulic actuator act. The actuator is special is advantageously integrated into the link bearing of the Radlenkers.

A Control of the actuator is done by one with the actuator connected control device which, based on sensor data, such as a yaw rate of the motor vehicle or a steering angle, controls the actuator. Advantageously, a control / regulation takes place the actuator so fast, for example in the range of tenths of a second, the track of the rear wheel is adjusted depending on speed and driving situation can be.

Thus, according to the invention be achieved in an advantageous manner that the track of the rear wheel accordingly a respective driving situation or driving speed in the desired manner is actively adjusted by means of the handlebar bearing of the Radlenker thereby increasing the driving safety and improving the driving experience. In particular, with a correspondingly fast control, a break-out of the vehicle prevented or delayed. Furthermore, can If necessary, an intervention of an ESP regulation is delayed or be prevented (ESP = Electronic Stability Program).

at an advantageous embodiment of the independent suspension according to the invention forms the track-hander backwards, especially in the vehicle longitudinal direction extending wheel carrier strut, at which the Radlenker attacks.

at a further advantageous embodiment of the independent suspension according to the invention can in a trained in the form of a bearing bush arm bearings the cooperating with the bearing bush adjustment mechanism relative distance in the vehicle transverse direction between a rotation axis the bearing bush to which of the link connected to the bearing bushes is rotatable (and which corresponds to the articulation point of the Radlenkers), and the wheel carrier be adjusted. In particular, but not exclusively in In this case, the adjusting mechanism comprises in an advantageous manner an eccentric mechanism, which the wheel carrier or alternatively the Radlenker in a direction perpendicular to the axis of rotation of the bearing bush, horizontal Direction (that is in vehicle transverse direction) with the bearing bush (mechanical) coupled and in a direction perpendicular to the axis of rotation of the bearing bush, vertical Direction (that is in the direction of the vehicle height) (mechanical) not coupled (decoupled). The location information refer on the ordinary Installation position of the bearing bush in the independent suspension of one on a horizontal Roadway located motor vehicle, wherein the axis of rotation the bushing substantially parallel to the vehicle longitudinal direction is.

According to one Embodiment of the independent suspension according to the invention can this for the articulation of the rear wheel carrier a so-called H-arm handlebars as Radlenker include. Particularly advantageous is still a essentially extending in the vehicle transverse direction (upper) Wishbone provided, which is located above the H-arm handlebar is. The location information "upper" handlebar or "lower" handlebar relate the relative position which these two handlebars in ordinary Insert mounting position to each other.

Of the Upper wishbone is towards the middle of the vehicle (ie on the vehicle) on the vehicle chassis or subframe by means of an example designed as an elastic bearing bush or joint handlebar bearing pivoted. Radträgerseitig (the is called on the side of the wheel carrier) is the upper arm by means such as elastic Bearing bush or joint executed Handlebar bearing on the wheel carrier pivoted. The upper wishbone allows on its vehicle and wheel carrier Anlenkpunkten an input or rebound movement of a from the rear wheel carrier worn rear wheel of the motor vehicle. The wheel carrier side Handlebar bearing of the upper arm is arranged so that it is suitable is to absorb forces acting in particular in the vehicle transverse direction. The wheel carrier side is advantageous Handlebar bearing of the upper arm in approximately above the wheel axle the rear wheel arranged.

Of the lower H-arm handlebar advantageously comprises a substantially in Vehicle longitudinal direction extending section, hereinafter referred to as "trailing arm section", and at least one substantially in the vehicle transverse direction extending Section, hereinafter referred to as "wishbone section". Of the Trailing arm section and the wishbone section are through sections of the H-arm link shaped. equally but it is also possible that the H-arm handlebars out first composed of separate items that are rigid with each other get connected.

Of the Trailing arm section and the wishbone portion of the H-arm link are on the substructure, if necessary with the interposition of the subframe, for example by means of designed as an elastic bearing bush or joint arm bearing pivoted. wheel carrier is the H-arm handlebar by means of at least a first and a second wheel carrier Handlebar bearing, which, for example, as elastic bushings or joints performed are, on the wheel carrier pivoted. The H-arm handlebar allows you to and wheel carrier side Anlenkstellen a one or rebound movement of a rear Racks worn rear wheel. Here, at least the first wheel carrier side Handlebar bearing, based on the direction of travel of the motor vehicle, offset arranged to the wheel axle of the rear wheel, wherein the first wheel carrier side Handlebar bearing is advantageously arranged so that it, based on the direction of travel of the motor vehicle, behind the wheel axle of the rear wheel located.

The Designation "H-arm handlebars", which for this Type of handlebars commonly used by professionals is derived from the special shape of the handlebar: wishbone section and trailing arm section together form the upper part of the "H", including the dash, wherein the right vertical line of the "H" corresponds to the wishbone section, while the dash and the left vertical line of the "H" correspond to the trailing arm section. The two lower vertical dashes of the "H" become by transverse connecting sections of the vehicle transverse direction extending H-arm handlebar formed by the articulation of the H-arm handlebar on the wheel by means of the first and second Radträger-Lenkerlagers serve. These cross-connection sections are merely optional available. Although the "H" in the H-arm handlebar strongly deformed, this designation is made by professionals used in the field of suspension technology.

In addition, it may be advantageous if the second wheel carrier side arm bearing of the H-arm arm is arranged approximately below the wheel axle of the rear wheel. The wheel carrier side arm bearing of the upper arm is located approximately above half of the wheel axle of the rear wheel, the second wheel carrier side arm bearing of the lower H-arm arm and the wheel carrier side arm bearing of the upper arm are arranged in alignment approximately in a vertical line, which has the advantage that an approximately vertically oriented by these two arm bearings "Pivot axis" is formed for the wheel, to which the wheel carrier can be pivoted so as to adjust the wheel track, while at the same time to produce a camber or change.

In the independent suspension according to the invention can It will continue to be advantageous if the trailing arm portion of the H-arm handlebar not on the subframe, but directly on the substructure of the vehicle body by means of, for example, as an elastic bearing bush or joint trained Lenkerlagers is pivotally mounted. In particular in In this case, it may also be advantageous if the axis of rotation of the steering bearing is directed so that they are in a non-zero Angle to the vehicle's longitudinal direction towards the vehicle outside is employed. This has the particular advantage that when occurring from Längs- and shear forces one through the other elastic arm bearings of the motor vehicle caused lane adjustment of the rear wheel to be counteracted can, because of this design of the articulation of the trailing arm section at the vehicle underbody the rear wheel during a braking process in toe-in is forced. This design of the H-arm handlebar corresponds to one called "Compliant H-arm handlebars".

The The invention also extends to a motor vehicle with the top described independent wheel suspensions for the rear wheels equipped is.

embodiment

The Invention will now be explained in more detail with reference to an embodiment, wherein Reference to the attached Drawings is taken. Show it

1 a schematic perspective view obliquely from above of an embodiment of he inventive independent suspension for a rear wheel of a motor vehicle;

2 a schematic perspective side view of the independent suspension of 1 ,

An embodiment of the independent suspension according to the invention for a rear wheel of a motor vehicle, which total with the reference number 1 a total comprises the reference number 2 designated lower H-arm arm, which is a substantially in the vehicle longitudinal direction (x) extending trailing arm section 3 and a substantially in the vehicle transverse direction (y) extending wishbone section 4 includes.

The H-arm handlebar 2 is with its trailing arm section 3 by means of two link bearings 5 . 6 on a wheel carrier 7 pivoted. At the wheel carrier side arm bearings of the H-arm handlebar 2 it is a trained as a bearing bush first link bearing 6 and to a designed as a bearing bush or joint second link bearing 5 , About the wishbone section 4 is the H-arm handlebar 2 on the vehicle side with a trained example as a bearing bush or joint arm bearing on the subframe 8th (or alternatively on the substructure) pivotally mounted about a substantially parallel to the vehicle longitudinal direction (x) pivot axis (not shown in the figures). The vehicle-side arm bearing of the wishbone section 4 allows a rebound or rebound movement of the rear wheel. The subframe 8th is rigid or elastic over a plurality of elastic bushings 9 on in 1 not shown substructure of the vehicle body stored.

The trailing arm section 3 of the H-arm handlebar 2 has a curved spatial shape. It is about a trained example as a bearing bush or joint arm bearing 10 stored on the vehicle body of the vehicle body. Due to the special shape of the trailing arm section 3 of the H-arm handlebar 2 is the pivot axis of the link bearing 10 directed so that it is employed in the direction of the vehicle outside, so, viewed in the direction of travel of the motor vehicle, a non-zero angle to the vehicle longitudinal direction (x) occupies. Due to this special shape of the trailing arm section 3 and in particular the position of the pivot axis of the link bearing 10 and its extension direction in the vehicle longitudinal direction (x), and a compliance of the wishbone section 4 , can be achieved in an advantageous manner that when exposed to longitudinal and lateral forces a displacement of the center of the wheel carrier 7 to the rear, with the result that the rear wheel is pressed in toe. Advantageously, this can be counteracted by a usually occurring Nachspurverstellung the rear wheel. This is a passive lane adjustment of the rear wheel.

The independent suspension 1 further includes an upper wishbone 11 which extends substantially in the vehicle transverse direction (y). Towards the center of the vehicle is the upper wishbone 11 via an example designed as an elastic bushing or joint arm bearing 12 on the subframe 8th pivoted. The handlebar bearing 12 allows a pivoting movement of the upper arm 11 around a substantially parallel to the drive tool longitudinal direction (x) lying pivot axis, so that a input or rebound movement of the rear wheel is possible. Radträgerseitig is the upper wishbone 11 by a running example, as a bearing bush or joint arm bearing 13 on the wheel carrier 7 pivoted.

The wheel carrier side arm bearing 13 of the upper control arm 11 and the wheel carrier side second link bearing 5 of the H-arm handlebar 2 Together form a Vorspurverstellachse 14 , As indicated by the arrow, can by pivoting the wheel carrier to the Vorspurverstellachse 14 the toe of the rear wheel are adjusted. Although not shown in the exemplary embodiment shown from, it is inventively preferred if the wheel carrier arm bearing 13 of the upper control arm 11 and the wheel carrier side second link bearing 5 of the H-arm handlebar 2 are arranged in alignment approximately in a vertical line, so that the Vorspurverstellachse 14 is directed approximately vertically, with the result that the toe of the rear wheel without simultaneous generation or change of camber is adjustable.

In the embodiment of the independent suspension according to the invention, the first wheel carrier side link bearing 6 of the H-arm handlebar 2 in the form of a bearing bush 16 formed with integrated actuator. The actuator is used to operate one with the bearing bush 16 cooperating adjusting mechanism for adjusting the distance in the vehicle transverse direction (y) between the H-arm handlebar 2 and the wheel carrier 7 by means of the bearing bush 6 , For articulation to the wheel carrier 7 becomes the bearing bush 16 from a fork pair 15 encompassed. The fork pair 15 jumps from one of the wheel carrier 7 shaped and rearwardly extending Radträgerstrebe 17 in front.

Using the in the bushing 16 integrated actuator, such as an electric motor, by a (not shown) eccentric mechanism for adjusting the position in the vehicle transverse direction (y) of the pivot axis of the bearing bush 16 the distance in the vehicle transverse direction (y) between the H-arm handlebar 2 and the wheel carrier 7 be changed, as in 1 illustrated by the double arrow. By changing the distance in the vehicle transverse direction (y) between the H-arm handlebar 2 and the wheel carrier 7 becomes at the same time the wheel carrier 7 around the toe adjustment axis 14 turned, leaving the track of the wheel carrier 7 or the wheel worn by this can be adjusted. The rearwardly extending Radträgerstrebe 17 extends the lever arm for a track adjustment through the link bearing 6 ,

1

independent suspension

2

H-arm link

3

Trailing arm section

4

Wishbone section

5

link bearings

6

link bearings

7

wheel carrier

8th

subframe

9

bearing bush

10

link bearings

11

upper wishbone

12

link bearings

13

link bearings

14

Vorspurverstellachse

15

pair of forks

16

bearing bush with integrated actuator

17

Radträgerstrebe

Claims (15)

Independent wheel suspension of a motor vehicle, in which a 2 ) at a pivot point by means of a link bearing ( 6 ) on a wheel carrier ( 7 ) is articulated, wherein the link bearing ( 6 ) is provided with an actuatable by an actuator adjustment mechanism by which a relative distance in the vehicle transverse direction (y) between the articulation point of the Radlenkers ( 2 ) and the wheel carrier ( 7 ) is adjustable. Independent wheel suspension according to claim 1, in which the wheel follower ( 2 ) on a rearwardly extending Radträgerstrebe ( 17 ) of the wheel carrier ( 7 ) is articulated. Independent wheel suspension according to one of claims 1 to 2, in which the actuator in the arm bearing ( 6 ) of the Radlenker ( 2 ) is integrated. Independent wheel suspension according to one of claims 1 to 3, in which the wheel carrier ( 7 ) by means of a H-arm handlebar ( 2 ) is pivotally mounted on the vehicle body. Independent wheel suspension according to claim 4, in which the H-arm handlebar ( 2 ) with a trailing arm section extending substantially in the vehicle longitudinal direction (x) ( 3 ) and at least one substantially in the vehicle transverse direction (y) extending wishbone section ( 4 ) is provided. Independent wheel suspension according to one of claims 4 or 5, in which the H-arm handlebar ( 2 ) on the wheel carrier ( 7 ) by means of at least one first and second wheel carrier-side link bearing ( 6 . 5 ) is pivotally mounted, wherein at least the first wheel carrier side link bearing ( 6 ), relative to the direction of travel of the motor vehicle, offset to the wheel axis of the rear wheel is arranged. Independent wheel suspension according to claim 6, in which the first wheel carrier-side arm bearing ( 6 ) of the H-arm handlebar ( 2 ), relative to the direction of travel of the motor vehicle, is arranged in front of or behind the wheel axle of the rear wheel. Independent wheel suspension according to claim 6 or 7, in which the second wheel carrier-side arm bearing ( 5 ) of the H-arm handlebar ( 2 ) is arranged approximately below the wheel axle of the rear wheel. Independent wheel suspension according to one of the preceding claims 4 to 8, wherein the trailing arm section ( 3 ) of the H-arm handlebar ( 2 ) on the substructure of the vehicle body by means of a link bearing ( 10 ) is pivotally mounted, wherein the pivot axis of the link bearing ( 10 ), relative to the direction of travel of the motor vehicle, is set at a non-zero angle to the vehicle longitudinal direction (x) towards the vehicle outside. Independent wheel suspension according to one of claims 4 to 9, which has a substantially in the vehicle transverse direction (y) extending wishbone ( 11 ) above the H-arm handlebar ( 2 ), which on the substructure by means of a link bearing ( 12 ) is pivotally mounted and on the wheel carrier ( 7 ) by means of a wheel carrier arm bearing ( 13 ) is pivotally mounted. Independent wheel suspension according to claim 10, in which the wheel carrier-side arm bearing ( 13 ) of the upper arm ( 11 ) is arranged approximately above the wheel axle of the rear wheel. Independent wheel suspension according to claim 10 or 11, in which the wheel carrier-side arm bearing ( 13 ) of the upper arm ( 11 ) and the second wheel carrier arm bearing ( 5 ) of the lower H-arm handlebar ( 2 ) in about a line ( 14 ) are arranged vertically in alignment. Independent wheel suspension according to one of claims 1 to 12, in which the wheel carrier ( 7 ) with the interposition of a sub-framework ( 8th ) is mounted on the substructure of the vehicle body. independent suspension according to one of the claims 1 to 13, in which the actuator is an electro-mechanical or electro-hydraulic actuator is. Motor vehicle with independent wheel suspensions according to one of claims 1 to 14th