AT524955A4 - Platform for at least four-wheel motor vehicles with electric drive - Google Patents

Abstract

In a platform for at least four-wheel motor vehicles with an electric drive, the right and left wheels (11) can be steered by at least one axle assembly (2) and are driven individually by a respective electric motor (15). The wheel carriers (12) of the right and left wheels (11) are coupled to one another via rod parts (28, 29) articulated on the wheel carriers (12) and an adjustable connecting unit (30) connecting the rod parts (28, 29). The wheels (11) are steered only by means of drive and/or braking forces. At least one actuator (31, 44, 47, 57) of the adjustable connection unit (30) covers the distance between the right and left connection points (30a, 30b) via which the connection unit (30) is connected to the respective rod part (28, 29). is actively adjustable or a change in the distance between the right and left connection points (30a, 30b) can be released and blocked.

Description

The invention relates to a platform for at least four-wheeled motor vehicles with an electric drive, having at least one front axle assembly forming a front axle and axle

at least one rear axle forming a rear

Baugrucpe, in a LÄNysrTi clearing of a load-bearing chassis

the platform are spaced apart and of which at least one of the axle assemblies has wheels which can be steered about respective pivot axes and which are mounted on pivotable Radirägern about wheel axles so as to be rotatable!

sing, whereby the right and the left wheel of this axle assembly are each driven individually by a respective electric motor with regard to the rotation about the respective wheel axle and for coupling the wheel carriers of the right and the left wheel with regard to the pivot positions of these wheel carriers on the pivot axes on the right wheel carrier, a right one Rod part is articulated and on the left wheel carrier a left rod part is articulated, which is connected to the right rod part, wherein the steering of the wheels aur means with respect to the rotation of the wheels about the wheel axles

acting driving and / or braking forces takes place.

attforms for four-wheel motor vehicles with electr

A A

are known in different forms from.

Yes in terms of autonomous driving, with partial

also scopes with limited

n / A

Highest aa

or 90 km/h, there are new requirements and

Ayaat

Opportunities that have already resulted in new ÄNSATUZE benefits

EN ur GEST have,

purposes

So have been specially designed for brine? Hgyeappropriate platforms are developed in a simple manner

can be equipped with different structures,

ANA

for different purposes, for example

N / A

Persanentransport or Lasteniransport to allow.

Such platforms are also called skatebocard platforms

In the case of four-wheel motor vehicles with electric propulsion, where Aaie both steerable wheels of a front ACAS assembly,

which forms a Varder axis, individually by means

Wheel hub motors are driven, it is already known that

TA = 5x El He wu Pa 3 7 SEN me Steering of the wheels only by means of drive and/or braking forces

Fa x to the Ai 3 x aA N Dan FAZ a to carry out. This is for example from DE 10 Z01

104 391 AL or WO 20920/169134 Al, those for the front axle

belonging wheel carrier, which can be pivoted to steer the pivot axes, are connected via a connecting rod, which is articulated to one another

connected to each other, to steer the

rod parts

Wheels is neither a mechanical on the rod part

acting part still has its own steering actuator.

Rather, the motor vehicle is steered by the fact that

with the individual wheel drives on the steerable axle

arranged wheels driving and / of braking torques #4

a5 this

be endured, showing the wheels in a given®s

the

Rä steer direction, Bramgmomente to steer the wheels can instead or additionally by means of a mechanical

respective wheel to be exercised, For

Brake disposition

the case of failure of a single wheel drive is one

connecting Standgenteile cooperates to slow them down

+ A

or blockie

also from US 10,562,400 B2

Bine similar device ve hervar. The holding device to a respective one of the lLlenkbare

ile to

Fasten the frame in a reclining angular position

with the swivel bearing of the

affects you here:

together around the pivot axis.

steering device known from US Pat. No. 9,221,4925 B2

Balinese

cell steering actuators,

wheels, on the other hand

the L

which the angular position of a respective Radträgeryers to the

set skachse active, these steering actuators are

Sw

in addition to the electric single wheel

available

The electric motors are outside of the respective KRada

arranged and connected to it via a drive shaft,

'that the occurrence of a

is known in

Vehicle instability under load changes or when braking

. ee Vs BE a Be hen coefficient of friction

ahn with different

Counteracted by this for the left and right wheels

a8 or

LS Az a 32 7 A A En 5 2 that the rear wheels can be brought into toe-in when cornering, for this purpose 1st

in DE 10 2006 055 294 A1 a device for adjustment

of the toe difference angle of the non-steered interwheels

described, there is a distance in

SA

Vehicle transverse direction between the pivot point of Radlen and the wheel carrier adjusted by means of an actuator. from Ger

x Ed ATS N SEM A Tai x €3 we en 7 a 5 = DE 10 2018 201 670 B4 is a track adjustment 2111808

Rear wheel known by means of an actuator that ın

En ERAKLKT

works better.

No - - | — EM ed 3 See Ve Da hros = ; Longitudinal direction of the vehicle on one

Fe Tg Ar Whose hal RS ra Se N vr & the object of the invention is to create a platform for the inc

provide said type, in which advantageous

A DAL

Driving characteristics are made possible. successfully

\

a platform with the features of claim 1.

LAN

serve

In the platform according to the invention, to enable adjustment of the toe difference angle between the right and left wheels, the rod parts are articulated to the wheel carriers via an adjustable connection unit

in

interconnected, this one is right on 2iner

ALLAN

Connection point with the right bar section and at a

hurry with the left pole piece

Connected to the left connector. The connection unit has at least one actuator, of which the distance between the right and

Lake. RP DT £

the left connection point is actively adjustable GÄder

which a change in the distance between the right and

the left connection point can be released and blocked.

a the invention becomes an advantage

ft platform for a

THERE

at which the steering of the wheels

Motor vehicle ready gesture takes place only with respect to the rotation of the wheels about the wheel axles acting driving and braking forces, with a

reference angle, which at one

ture of the Spurdı Degtinm steering angle of the wheels is present during the

driving is enabled.

Lhaft procedure, which the

Thus, according to a vorte:

Invention device applies, by a steepening Ser connection unit of the track difference angle when driving through curves with different cadences at the

respective curve radius are gassed, bine optimal

This enables cornering.

väß another advantageous method, which the

applies, he can

device according to the invention

a Da Al . aa A a Az the toe difference angle can be adjusted so much that the

-

vehicle is braked, This causes braking of the

Allows pahrzeugs while driving and / or a

Parking brake can be provided.

According to another advantageous method which the

a device applies, with both

arfindungsgemät and rear wheels are designed to be steerable and by means

Baren connection unit in her, at one

one petrified

specific steering angle of the wheels present, toe difference angles are adjustable, the steering angle

Wheels adjusted so that all

the front and rear EA WANARZL.

Baths stand tangyentially to a common circular line, It

inside the

this causes the vehicle to turn around &

Platform Lie: Preferably central lying,

imaginary center of the circle, i.e. a W

end at the FPLÄeck,

possible,

Xen RE Sn x. vi \ A Sesr IA da Yar, by way of example, is the Spurdiffe 'canzwinkel between the right

and the left bath of at least one Äaxs-Bauogrpe with lsteerable wheels via the versible connection unit

more than 5°, preferably more than 10°, more preferred

VAL

som n

a more than 20°, adjustable,

In the first variant of the invention, in which the distance

aa

and the left connecting point of the

N x between the

Connection unit of at least one AKTUACOL active

SA is adjustable, this adjustment is advantageously supported by the fact that the right and the left wheel

by means of driving and / or braking forces, which to the

Wheel axle act, so different steering forces are exerted bo

N

be that these in the direction of such Verschwernikuri

far angle is reached.

which of the S SOUL ©}

As a result, only small ones have to be removed from at least one actuator

De SE 0 SE actuating forces are exercised.

Will be the distance between the right and the left

Connection part of the connection unit of at least one

Actuator ni adjusted, so is the distance between the

Connection points are fixed and the movement of the left and right rod parts is synchronized via the connection unit

(= simultaneously in the same direction and with the same

speed} gekonpe

one

riante of invention, ın we

In the second change of distance between the right and the left

Connection point can be released by at least one actuator

and is lockable, the toe difference angle can thereby be changed in a release state of the connection unit

ce

and the left 830 different

be that that

to be steered. Dieges different steering of the wheels

A

takes place by means of driving and / or braking forces, soft

SL act around the respective bath axis, in a Sparr state of the connection unit is then the distance between the

Connecting steles fixed and the movement of the left and

etc

right rod part is synchronous via the connection unit

(= ysimultaneously in the same direction and at the same speed}. A change in the toe difference angle {relative to a specific steering angle of the wheels} is thus blocked, the adjustment

actual state and the state of the scerr

between release

Varverbindungen unit is carried out by the at least one

Aktbualor,.

de drive and

de . A n 5 NE ee de In particular, the wheel axles can act

to steer the pools with the single wheel drives

braking force

7 ar a n EN A Da ns ea YO A be exercised, Instead dder additionally

Srema forces to steer the wheels if necessary also with

brake devices door the R&

mechanıis

will.

In one possible embodiment of the invention, the

Connection unit from at least one actuator

-Frictionable, self-locking screw gear on, through

which is the distance between the right and left

Contact point VS ysteli

in another possible embodiment, the

x u Dr 2 SZ Ay > u TS - & 4 connection unit two angled Zue standing and around

an axis mutually pivotable arms, which in

Distance from the axis in each case one of the connecting parts

Exhibit. The angle between the arms and therefore the

had and the left junction

A} hen the ri stand between the ri

y shareable or the

is from at least one ÄActuator v

A

ZT

Pivotability of the arms is from at least one actuator

releasable and blockable,

In a further possible embodiment, the connection unit has at least one hydraulic piston-cylinder unit with a cylinder arranged in one

Piston, which is adjustable by at least one actuator

Relief from at least one

or its position in the Z

Actuator can be released and blocked,

Rere advantages and details of the invention are in

ends with the help of the enclosed drawing. In

Others show:

embodiment

ohräicht

figure 1 one

Platform according to the invention:

431 x Sa va EN 3nn ML FiQ. = a side view; pig 3 is a bottom view;

Fig. 4 shows an exploded view of a front axle mochz (without the parts arranged on the wheel carrier on the left in relation to the direction of travel};

5 is an oblique view (including the parts arranged on both wheel carriers);

fioq. €& a plan view;

Fig. 7 a top view analogous to Fig. £ with one opposite

Fig. & changed toe difference angle;

wa Ss Aa wi A ° Fig. 8 a front view;

va a lake i 3 ea . ya nn Rn da iq, SS an exploded view of the connecting unit;

average cut through the

. ; Fig. AU one

A

aaddition unit;

Fig. 11 and 12 adjusted differently

Zn a1 Ss a as See toe difference angle of the steerable front wheels

cornering with different radii;

Positions of the steerable front wheels

Pia. 13 and for braking the vehicle; A

Fig. 15 is a ztark schematized representation of a

Embodiment with lsteerable front and

rear wheels whose steering angle is tangential to

are set in a common circle line;

6 to 18 an oblique view, a plan view and a

Front view of parts of an axle assembly ge

ass

a second embodiment of the invention;

> x AL

19 to 21 representations analogous to FIGS. 16 to 18 according to

example of the invention;

an Aritten Ausf£i

A x 3 & m ya dee 7 Ans A Er x ART Fig, 21 to 24 representations analogous to Pig. 16 DLS 1 L mx © = x Tan Wu Fi A

a fourth exemplary embodiment of the invention,

For the sake of clarity, these are simplified,

AD

Del iwise schematic representations,

A first embodiment of the invention is in

hand of Figs. 1 to 10 explained, the platform

The following has a chassis 1 from which a front axle assembly 2 and a rear axle assembly 3 are carried. In the

the chassis 1 is merely a contoured board

shown schematically, In practice, the chassis will have different parts, e.g. interconnected beams and/or plate parts, preferably on the chassis

mn

Installed simulators for the electric drive, the ın

also

are not shown in the figures.

The front wheels 11 are based on the direction of travel

steerable. The motor vehicle has a steered

Front axle, The front axle assembly 2 includes the front wheels 11 together with their wheel suspension and forms the steered front axle, as described below in more detail aschri 3 "bar"

NLA

Not

The rear wheels 7 are steerable in the exemplary embodiment. The rear axle assembly 2 includes the rear

Wheels 7 together with their suspension and forms the

lower axle off.

In a further advantageous embodiment, the rear axle assembly could also have 3 removable wheels. In particular, the rear axle assembly could be analogous to

be formed front axle assembly,

ca platform could also be more than two

A invention£

Axle assemblies have 2=.B, in addition to a front one

axle assembly two rear axle assemblies,

ealche

NEN AAN

to be referred

The rear axle assembly 3 is in the exemplary embodiment with

ea: Rigid axle 4 formed, this iet by means

AL AT

cards 3 to a base unit 6 of the rear

Blattfederpai axle assembly 3 suspended, the rigidly trained in itself

Basic unit 6 is screwed to chassis 1

fastened.

The wheels 7, which are rotatably mounted on the rigid axle 4, can be rotated individually or together by means of at least one ElektromoClor

be driven, for example by means of wheel hub motors.

An additional mechanical braking device

know, may exist, but it is

ts,

two wheel, like £

also an education without an additional mechanical

aiy HS Sremeinrichtung, which brakes the rotation of each wheel about its bathroom axis, conceivable and possible braking forces, which brake the rotation of each wheel about its Radachse, could in this case only from at least one

x

Drive amoctor for the wheels 7 are exercised.

Fin drive for the wheels of the rear axle assembly could

BOOK omitted,

The Vardere axis RBauogrucpe 2 has in the embodiment

a rigid base unit 10 which the

lake

'ad suspension carries. About the base unit 10 takes place

Connection to the chassis 1, The front ÄAches assembly Z

ijat here preferably with the chassis i by a

SD

screw connection

The right and left wheels 11 of the front axle assembly 2

Badträger 12 to a respective

are at a respective

En

Wheel axle 13 Arehhar yelagert, ULe wheels 11 are lsteerable,

= üfäA EAST 13 AT

For this, the right and the left are RAadı

S x 3A ea De Sa se & pivot axes 14 pivoted Dar stored,

The bathrooms 11 of the front axle assembly 2 are individually

'nem respective ctrometor 15 driven around the respective wheel axle 13. In the embodiment shown, the

romators designed in the form of front wheel hub motors,

Ele

aa lecha re Gun met Ch My ac an Ana a N Daclaalahalk TAN It would be conceivable and possible, for example, that at the Basıseinneii LO

=

attached electric motors available si

A 1 4 Sam Ar WALC hs with Cem

respective wheel 11 connected via a respective drive shaft

are.

The Ten MY 4 LA Dye 0 act is also for a respective bike

In execution

ÄLSSSM

11 a mechanical braking device available,

A

Connection are in Fig. 4, a brake disc 15 and a

BY EMES

An apprenticeship without one would also be possible

mechanical braking device, soften the rotation of the

brema forces,

respective wheel about its axle

velche the rotation of the respective wheel around its wheel axis AN

braking, could in this case be caused by the electric motors 15

become ZUSTSUWDL,

The wheels 11 of the front axle assembly 2 are in

Embodiment on a trailing arm BR suspension

currently

Aa Wan an X A ANNE 3 4 ne UN man 7 Ger DÄSLSOLI © 10 and thus via this on the chassis ı

hung up. There are both for the Yecht wheel as

the left wheel 11 each have a trailing arm 20

aa

also

present, which is about a respective transverse axis Z1 with the

L.A

m

N ten Se Ha anden 18582. The

aa it a RE SCNHSEN

10 swivel ver:

basic unit

22 perpendicular to the longitudinal direction of the platform and

preferably horizontal,

i.e

= x 55 "Swen 1 my a a1 tone ALL lies OALDELLEL

The longitudinal direction of

no,

the straight-ahead

The wheel carriers 12 are mounted on the respective trailing arm 20 such that they can pivot about a respective pivot axis 12 in order to

to enable the respective wheel to be steered,

N

The pivoting of the trailing arms 20 about the transverse axes

are spring-loaded. A respective torsion bar spring ZZ is required for this

©

the respective trailing arm 20 present, this respective

Torsion bar spring 22 extends kyaxlal to each

Ouerachse 21. So that the torsion bar springs 32 as long as possible

may be excavated thanc a greater length

half the track width can have '&ind the O transverse axles 1 for

offset the right and left trailing arms 20 to one another

Embodiment relate to the longitudinal direction of

Platform, A.h, one of the two Auer axes 21 is further

N ER m N m A ia ER N 7 Re AA Mi sr in front and the other of the two transverse axes 21 further inten. x

The offset of the transverse axes 21 could statidessen or

additionally also in height.

ängslenker 20 on the

In the exemplary embodiment, the right and left sides are of different lengths according to the Versetlz of the transverse axes 21, so that the

Wheel axles 13 of the right and left wheels 11 coincide.

The wheel axle 13 of the right and left wheels IL could also

relative to each other in the longitudinal direction of the platform

to be PERFECTED,

In one of the connection with the respective longitudinal sinker Zi

© ws es 3 SE See CE Ar Tran ns ty IF X 5 area is the respective torsion bar spring 22

A

spaced

sis unit 10 (found via the

irreplaceable

aagis 1} connected, serves this purpose

Base unit 10 with the CI

A ST = iR es = A ee A a de ne Fene One HAlteleli SS of a solid connection

ANELEIOE

On

AA N nn HM ve 35 a ET )om with the respective torsion bar ZE s

ht, around a

Enabling the setting of the spring force is a matter of fact

axes 21

socen on the parallel to Sen Quer

ebeil 23 De

lying transverse direction displaceable with the respective

Torsion bar spring 22 connected and in the transverse direction

On

slidably mounted on the base unit 10, a jrespective

Holding part 2% ia@t thus also compared to the chassis 1 in the

Transversely displaceable. To postpone the respective

ite part 22 in the transverse direction is preferably respectively

an electrically operated actuator 24 (i.e. an actuator)}

ish

A Ya Yes A A VS ee Tom —_ the Ta available, it came by means of an elec

S chtung (not shown in the figures} a

Ah

AAUSTUNOSELK

Adjustment of the suspension, even while the vehicle is in operation

take place.

The non-rotatable connection of the respective holding part 23 with the

wire 22 takes place via a respective

respective torsion bar£

Connector 25. Its rotational position relative to the

Salteteil 23 is adjustable and fixable, whereby a preload of the respective torsion bar spring 22 is set

nn Ye can be

ES a a Ye . FON me A A ayuslenkers 30 1st through

the waste

and the respective

af, in the example

a respective damper 26 gedär

x © © m An u “ mx v x € +53 nn m 3 ämofer 26 rotary dampers provided over which

are as

Joint 20 can be pivoted about the lower outer axles 21

fax

on a depending Sc 108 of the base unit 10

distant 26 and

10a

Ay To rem yes ms Fear aA me a SEN a are stored, The connections between

the trailing arms 20 on the one hand and the

on the other hand, ifnot algae can be caused by screw connections

in the figures),

illustrated

on steering the R

5 N Ca rm Ta ar "A around the pivot axes 1

the

pivotable wheel carrier 12 of the right and left wheel 11

srverbindungen, causing the pivoting

get together

of the right and left Radtırägers 12 to the respective

Schwenkachee 14 is coupled to the respective Eadträger 12 is

a respective rod part 28, 22 articulated (= articulated

tied together). The o-jointed connections are in the

Embodiment designed as ball joints. The right

subtitles

Une Sas left rod part 28, 29 are through an in between

AAN

arranged connection unit 30 connected to each other. That

ALLES

right rod part 28 is at a right connection point

qunit 30 on the connection unit

30& the connection

via a ball joint, that

articulated in the exemplary embodiment

293 is at a left junction

left rod part

30h of the connection unit 30 to the Ve arverbindungseinheit 30

e.g. via a ball joint,

hinged, in execution document

KA

Aa

The articulated connections between the rod parts 28,

and the wheel carriers 12 and/or between the rod parts 48,

A TA SA

and the connection unit 30 could also be in other

>

algwise via cardan joints,

Way done, ex

in

The rod parts 28, 29 are in one piece in the exemplary embodiment

trained, A multi-part training, for example in

Form of two articulated parts, 18t

Imaginable and possible.

rank parts 28, 29 and arranged between them,

Shower the S AQie rod parts 38, 29 connecting connection unit 30

SA

: 5 x 1 1 55 An Y * becomes a kind of articulated connecting rod

as Aa De SL nA Aa A formed, give way to the wheel carriers 1X of the right and left

zZ SA + DA ur x and this mecCha WLScChH kKOoppelt °

Wheel 11 connected to each other

15 The steering of the i.e. the setting ST

we 1 day X 3 . YA Ahern a hm en Ä er x angular position of the wheels 11 about the pivot axes 14 foalat,

Ay vi a

& ANDLLODS- U f or

as already mentioned, only

Brams forces, therefore has no steering mechanism available,

cher the rotation of a steering wheel mechanically on the

by white

it lm OUT Sy SP {x AR } \ £ Ya sin angular position of the wheels is transmitted. Also are

ZA

no additional steering actuators present, which do not drive the wheels about the wheel axles 13 but only for active purposes

Binsteli the angular pitch of the wheels around the pivot axes

SD

14 serve,

ah

aa

A steering of the wheels only by means of drive and braking forces

HE

Lich already known and must be under this

is fundamental

For this

Scripture are not explained in detail,

no

Aienende electrical control device is not

m

part of

Ey a EN = i a 5 ee rd } “FA Su za Se > shown, and neither does this isC in general

Platform, with a specific steering angle of the wheels, a curve with a specific radius is driven through, depending on

rker pivoted

the inner wheel must be reinforced

curve racdiı

Ya > Ye HA A = 7 = are called the Outer Wheel

Advantageously, the wheels are already pivoted

wheels, i.e.

by the geometry of the mechanical coupling of

niches

Aie wheels have the geometry of their mech

one from the steering angle

Coupling in ÄAbpendigke different track difference angle on, as this is known

is.

the difference between

The toe difference angle refers to the angular position of the right and left wheel of one of the

Achshbauorugpen, here the front ÄAcChsbaugruüuppe.

DAL

#5 is possible due to the geometry of the mechanical coupling

However, the optimal setting of the toe difference angle

ir a certain steering angle vb only be different.

hangs. the optimal value for the toe difference angle

Also

due to dynamic effects, such as those that occur on the tires in particular, with a certain curve radius

and

also depends on the speed

To adjust the toe difference angle between the right

A N ae de a surcharge 15€

and left wheel 11 at a certain len

Connection unit 30 adjustable, as explained below,

The in Fig. 94 in exploded view and Fig. 10 in

Länysschnitt Connection unit 30 shown simplified

bus

has in the exemplary embodiment shown an actuator 31 in the form of an electric motor with a stator 31a and a rotor

31h on The 31lb Rator forms a G gear nut with a

ALL.

thread 32. This is with an external thread 33 of a

in no

transmission

G drive rod 34 engaged. Thus, a Schr

is the

formed, which preferably the stator 31a is rigidly connected to a transmission rod 35, for example by means of a screw connection

© hollow so that the

Gear rod 325 is in Endabschni

Gear rod 34 can move into Aiesen Endabechnitt.

The gear rods 34, 35 are on a common

to the transverse direction and protrude on both sides

Straight oaralli a housing 386 of the connection unit 30 out. the stator

but iın the

Z42 dat in Gehs an ia i1at in the housing 36 torsionally slidably mounted arrangement, the stator points to this

KA

hey

31a in the exemplary embodiment has a groove 327 into which a ea

Tr A A Rn (m 3 144 & Aa EA Wan \ /orsyrung the case (not visible in the figures)

intervenes.

ee > X > house 35 15 mMLLCGLS

That

Tragschenkein 10h of unit 10 attached, where by

no 108 also the gear rods 34, 35 in

this

x vr r OS LAGRITT SI LG,

ST LENCUNG VeEerS sliding

the Cu

icnmen in which a housing of

siled cons

M £ TEA A

Connection unit can also be moved in the transverse direction

ae A A Yes Na ve im x A er Kam ES ee a Am compared to the Chassıs 153, where the housing G1ırekt could be formed by the CO AAN a vn pi © m = Se ie x x Ba FOR A stator are sr and possible.

and 34, 35

the gearbox star

By dAen actuator 321 al

be axially steepened, with the distance between the

AN 3 Na ZN ni binding sites 30a, 30h is adjusted.

on

If the actuator 231 is not operated, then ii the distance

=.

308, 30 fixed and

between the connecting Sielie movement of the two Si tangenteile 28, 29 is about

(= they move

Connection unit 30 synchronously geopp so yleichzeitig in the same Zichting and with the

same speed).

The force to adjust the bpurdb EEerwinks must

:uator 31 the

in this case, but not only from Ak

Varverbindungseinheit 30 are applied, Advantageously

A

AR

can do this on the wheels 11 through the on the wheels

in cder

se 13 exercised drive and /

Aiea en] 1icere Rasa LS 3 Wa Ges DU

oxen 14

eSinking forces regarding the Sw

Bremeskrä:

that this is the disguise of

be exercised

tutor 31 the

Support connection unit 30, The AK

x the steepening of the

XP A Are wi 1 u dun connection unit required by this

From Aa . AS Cr

end high

nzwinkels only a small force

SC on N fe

X ; - ie Aß 7 = x + Verbi NAÄULGS unit 30 but can have a 2NtSDYE

you!

the, around

force

Spurdi

to hold in all driving situations,

According to the construction of the connection unit 20 of this exemplary embodiment, it can thus be centered. of the actuator 31 of

Abat between the junctions 30a, 300 active

be adjusted, via which the connection unit 30 with

bound rod parts 28, 29

the one with the wheel carriers 12 ver

is connected, it is thus miktels of the actuator 31 a

THERE

Adjustment of the effective length of the connection unit, other configurations of the connection unit 30 according to this first principle of operation are conceivable and possible,

as exemplified below,.

According to a second principle of operation of the

Varbinduneeinheit is not from at least one actuator 5

the distance between the connecting points is adjusted but

sadly the

it is made by at least one actor

Variable distance between the connecting parts

1 See x Op Da 18 Weiler unlen

released and block] as well

explained

If in the course of adjusting the toe difference angle

Fto on at least one bath one

Drive and/or braking forces

Axle assembly can be exercised to steer this £ö

at least one wheel of another axle assembly drive

A

AS

MAC AZ

and/or braking forces are exerted in order to counteract the forces exerted when adjusting the spin difference angle, so that the overall condition of the motor vehicle, for example the speed, remains as unaffected as possible.

ANAND

11 and 12 show schematic representations of the

zn radii. means

platform when cornering ; different

+ 7 OS ed TO ea Ct u < Pe A 2a wem x a fin position of the toe difference angle 35 of the front

©

All of the connection unit 30 can

A Seh HS apa wheels 11 by the amp

the toe difference angle 39 to the respective curve radius

Sa Geyer w YA 1} ya 3 V Se HA FA be adjusted, In Figs. 11 and 12 this is dachuurd

Aardgent el 'dags the drawn auxiliary lines, the Aie bathroom axis of Zewai Lie to wyardaron ne rear Yadan 171 rz aiLe RAadachse of Jew211102071 VORGSTeN NG ANLeCeNn Kales Li

different steering angles of the front ones

leave SUN,

cut poor funct,

in one thing in common

ae SONG

positions are

taken into account in these

ie already mentioned depends due

effects,

aie especially on the tires

A Ai anche AR Sale ur äaynamischer effects, wi

angle at

occur, the ootimal value for the track difference:

GL

3 NG _- 3 OO Nom SA SH z a Aius also depends on speed, Der

a specific one

"exenzwinkel can also depend on the

STYLE eALE:

speed can be optimally adjusted

If the rear wheels can also be steered, they can be used

the. The rear axle

a cornering s steered. we

then in an analogous manner to the one in front

module

Axle assembly and the toe difference angle

of the rear wheels can be adjusted by adjusting them

Wheels örigen connecting unit to the respective

Curve radius can be adjusted.

13 and 14 show the possibility of braking a

Motor vehicle by the steerable front wheels 11 in the

Position of a very strong toe-in or toe-out brought

will,

"Ai dia hie WaAar a3 ar 2a Aa aa x If the rear wheels are designed to be steerable &ind, we can

NA LAN SA =

Ezilıch or

to brake the vehicle, the rear wheels instead of the front wheels are brought into a strong FORESDUR or NachSDPUL,

right and left wheel

Of the

inkel

“dLfferer

for braking the motor vehicle is preferably more &

109, especially preferably more than 30°, Braking the

can succeed while driving

VINTAGE vehicle from SE LE

i Bremse can be realized in this way

SESt

or a fe

will,

aeim braking during the Pahrt in this way, the

Ct 43 4a DE ent A < Y 45 3 fe = /or rear wheels by means of drive and/or

front and braking forces are steered accordingly in order to

to keep the vehicle stable

the

Se SOWO

In one embodiment, in which

Toe difference angle between the front wheels as well

is adjustable between the rear wheels, can

m

This is

turning of the vehicle at the stand should be made possible.

shown schematically in Fig. 15. The angular pitches of the

?7 to their respective

front wheels 11 and rear Räc A 7 Se Ar A x r OT zz 7A N KA SE swivel axes are adjusted here so that all wheels

feet

7 tangent to a common circle line 27

5. The middle point of this circular line is central

vay. Fig to the platform form.

fa

wi 7 = $ in second version

of the invention is in the figure,

example 25 SiesQ Nee Hs ze em dd X x 16 to 18 darcestellite. Except for the ones below

seven differences, training can be the first

practice with

Ayıo E72 ee Ami x nn A UM 43 AULST ÜCUuNgS example ENCSDPT chen and its description

the described possible modifi} ons is analogous

approachable

angular

here

30 own SL N

EA Y A The Liaison Eli

the atehende arms d0ü and 41. The arms 420, 41 are

TOeiNa

Ne common NSSaMS Preferably vertical

GA enesinander around

Jade 3A Angle 43

Nee A ren as - _ A axis 42 pivoted, so d

Poor 40 and 41 is changeable. The axis 42

SS DT

m

AA Yan x Ay Avis AN AG ne A » I of one ends of the arms 40, 41. In the area

the other, from the axis 42 spaced ends of the

40, 41 there are connecting parts 30a, 3065 on white A318 arms 40, 41 with the right and left rod parts 28, 29

are articulated, by pivoting the arms 40,

AL can be the distance between the connection points 30a, 309

and thus Aie the effective length of the connection unit 30

be changed, whereby the toe difference angle between

the wheels 11 changeable list.

in the form of an EBlektromolLoOr

58 an actuator is provided by which the angle 43 between the arms 40, 4

is actively adjustable. In the actuator is not a here

specially shown gearbox integrated, the exit while

äthis Cattriebes works with a between the first and the

AAN

synchronization gear 45 acting on the second arm 41, 42

together, the one synchronous {= simultaneous and mi

X

ÖÜslow speed running}) opposite directions

35 A A R N _ ze Da causes about the axis 42. That

Pivoting of the arms 40, gearing of the actuator can be self-locking to block the pivoting of the arms 40, 41 about the axis when the actuator is not activated. As an alternative to a self-locking design of the transmission (or also in addition to this), an electrically controllable locking element 46 can be present, which blocks the pivoting of the arms 40, 41.

The axis 42 can be fe connected to the chassis 1,

preferably via the base unit 10 to which it is attached (not shown in the figures). Also one

conceivable and possible

flying arrangement of the ach

<

A third embodiment of the invention is shown in FIGS.

4 They 527 Am Ss A see en Ya z m En en 19 to 21 shown, apart from those below

SC

The training corresponds to the differences described

that of the second embodiment

In this exemplary embodiment, the actuator 47 is designed as an electrically controllable blocking element with which the pivotability of the arm 420 relative to the arm 41 can be released and blocked.

X

The actuator 47 can be an electromagnet, for example

have, which is based on a magnetorheological liquid

acts, which in the activated state the relative rotation

A Ms se Yo Ta blocked between two parts.

In the locked state of the connection unit 30, the distance between the connection points 30a, 205 is fixed

the sceur difference angle between the right and the left

Wheel 11 fixed for a respective steering angle. In the release state of the connection unit 20, the angle 453

between the arms 40, 41 and to a desired one

Value can be adjusted by steering the wheels 11 individually

will. Again, this individual steering of the wheels 11 succeeds

-iebs- and braking forces on the respective

act only by means of An Rad around its wheel axis,

25 can, for example, on a platform where only

7

the front wheels can be steered, the parking brake is activated in the following manner when the vehicle is stationary: In order to bring the front wheels 11 into a swivel position in which they have a sufficiently strong toe-in, the connection unit 30

of those driving the front wheels about the wheel axles

VAL

Electric motors a turning moment in the direction of movement

exercised in front. Of the 'electric motors, give those

2 ; Sb Kay en as N ne na K driving the rear wheels will be a correspondingly strong

Torque in the opposite direction {So in the

Lo AN

Direction of movement to the rear) exercised. Overall, the vehicle remains stationary due to the force exerted on the front wheels

kb

Torque, however, they pivot about the pivot axes

14. The application of the torques will } end when the desired swivel positions of the front wheels 11 are reached

are, from the actuator 47, the connection unit 30 is in the

Bocked state brought.

When driving, in the released state of the connection unit 30, the pivoting position of a bath 11 can be independent of the other wheel

un ä In N

11 be changed in that this wheel a

Accelerates or brakes, If desired

swivel position is reached, the connection unit 30

ms

brought back into the blocking state by the actuator 47,

whereupon the wheels 11 can be steered together. Of the

Source difference angle was thereby in the desired way

adjusted

In an analogous manner, the hei steerable rear wheels

Source difference angle of these wheels can be adjusted.

FOR N

of the invention is shown in Figs.

A fourth embodiment example

22 to 24, apart from those below

With the differences described, the training can be identical to the first exemplary embodiment and its description can be included

of possible modifications is analogous

the one described

approachable.

two piston cylinder

The connection unit 30 has hi

Details on, In the cylinder 50 of the respective piston-cylinder

Yinheit is a piston 31 which has a respective

28, 29

Calf rod 33 with the respective rod duck

is articulated. The pistons 5% and those in the respective

x A A N A Dam A 3 ann he N n He AT ana where the cylinder 530 located parts of the piston rods 53 are

indicated with dashed lines in Fig. 24, Die

Connection points 30a, 30b are located at the end of the respective piston 51 remote from the respective

Piston rod 33.

a first and a

3in each piston 51 second cylinder space 54, 55 in each cylinder from each other. The respective first cylinder chamber 54 is located on the wear 80 connection sa 303 30 on the respective connection point 3023, 306 zz

side facing, the respective second cylinder space 55

Indet me on the of the respective connection

BA A a Da de Sera ONE 53 30a, 30b facing away from the respective piston 51,

The cylinder chambers S4, 55 are hydraulic lines mLE

vi

iLt). in the

connected to a valve 565 (shown only in Fig. 24

and located in the hydraulic lines

the CyLINderT

a hydraulic fluid. The valve 56 is connected by a

BR

electrically operable actuator 57 between different

lungs adjustable

- N = Ss a 7 +5 Tantra TO eur 3 empty NS In a first valve position, over the

Hydraulic lines and the valve 56 connect the first cylinder chambers S4 of the two piston-cylinder bin units

and are the second cylinder chambers 55 of the two piston

51 of

Cylinder units connected to each other. The two piston-cylinder units can therefore only move synchronously (= simultaneously in the same direction and with the

Sy MON

same speed} move and that's the movement

en “ 4 & \& a 5A A = n of the 2 Zen rod parts 38, 29% synchronously coupled via the connecting unit 30. In this part of the valve {in which the

valve is in the position shown in Figure 24).

at a certain one

Adjusting the track difference angle

Steering lock blocked.

AR

A

4 men mai 5 Tom 4 N 7 A EA Sr EN 5 m Se Ar second valve position (the middle one in Fig, 24d

shown valve tests) is about the

egg

Hydraulic lines and the valve 56 of the first cylinder chamber

54 of the right piston-cylinder unit with the second

zLinder space 55 of the right piston-cylinder unit and the

first cylinder chamber 54 of the left piston-cylinder unit

the second cylinder space 5353 of the left piston cylinder

Rinheit connected, the pistons of the piston-cylinder units can thus move independently of each other, In. this valve position is the adjustment of the toe difference angle

A

released in Fig, 24,

As can be seen from FIG. 24, the valve can have a third

lung

Have valve position, in this third valve position

<a Ai en e ir = ET A aan ea an are those for the first cylinder chamber 54 and those for the second

Cylinder chamber 55 of the respective piston-cylinder unit

the hydraulic lines used by the valve are blocked, the pistons

the piston-cylinder E-units are thus fixed. In this

Ventilistellung are the pivoting of Radtıträger to the

Pivot axes blocked, This can be beneficial when

Au Aa A de I DA et AR os DA 15T AST KLSKTTYTOMOLOTEN 15 OUT

en embodiment could

In a further modified connection unit are formed by a piston-cylinder unit, of which the piston is connected to one of the two rod parts 283, 23 and the cylinder mic to the other of the two rod parts 28, 29, the cylinder

ac is displaceable and the piston of a

Actuator active relative to the cylinder adjustable In the simplified figures are apart from the

described electric motors for the individual wheel drives and

the actuators described other parts of the electrical

NN Sr EA en ba er an ae Yo a A 4 Stung, like electric wires

a Sensors

Ag

equipment

DELSDPLELSWESI

ang the angular position of the

8 sensors For

O4 m A fi Ah oe A en bar 12 around the pivot axis, not shown,

bike ride

16

On

"Az

5 SL

A

27

22

29 O

A SUR

DL 8

to the

Ohassis

Axle assembly rear ACHs-BAaugruuüßbße rigid axle leaf spring gaket base unit

wheel

case unit

leg

Brackets} Wheel Radıiräge Wheel axle Swivel axle Blektromocor brake disc Brake caliper Longitudinal anchor Cueraxle Torsion bar spring Holding part Stellitei' Connection piece Dampener Circle line Rod part Rod part Connection unit

connecting point

28

ss There

©

note

/42

Mn

x

">

ace

A No

Branch

45

To Zr Ar

EN 3

SA SG

SR

57

(S]

jEf

SX

Coupling areualor stator rotor internal thread external thread transmission rod

gear rod

Housing

Groove fastening part toe difference angle AT

poor

axis

angle

actuator

vn

CA in AGs os synchronization

transmission

blocking element.

actuator

piston stands

hard cylinder

second cylinder chamber valve

actuator

Claims (1)

x patent claims 1. Filattform for at least four-wheel motor vehicles with electric drive with at least one front axle assembly {2} forming a front axle and at least one rear axle assembly {3} forming a rear axle, which are spaced apart from one another in a longitudinal direction of a supporting chassis {1} of the platform and of which at least one of the axle assemblies {2} has wheels 11} which can be steered about respective pivot axes {14} and which can be attached about the pivot axes {14} swiveling wheel carriers {12} about wheel axles (13) are rotatably mounted, with the right and the left Where "an AA mn A CT Pa - {A garen A wheel {11} of this axle assembly {2} individually from a respective electric motor (15} with respect to the rotation about the respective wheel axle (13) are driven and for coupling the wheel carrier {12} of the right and the Left wheel {11} with respect to the pivoting position of the lungs 3A NO N EN Se AAN Yon AA m N var as} N {5 AN ar this wheel carrier (12) about the pivot axes (14} am a right rod part {28} is articulated on the right wheel carrier {12} and a left rod part (29) is articulated on the left wheel carrier (12), soft with the right rod part {28}, the wobel A The wheels {11} are only steered by means of driving and/or braking forces acting on the rotation of the wheels {11} about the wheel axles (132}, thereby ,On characterized in that the rod parts {28, 29} for a Adjustability of the track difference angle (35) between A 28 pp the right one understand AAN 1Lable connection unit (303 a and the left wheel (11) via a commonality are connected, which at a right : Connection point (30a) with the right pole section {28} and at a left junction the left rod minimum € {29} connected ens an actuator (31, 44, 47, wqsstellille {205} with is and 57 zE ; De EwWRAis ©, from which the distance between the right and left Connection point (30a, 30b} is actively adjustable from which a change in distance vachten and linksen connecting points can be achieved and bilocked, Platform according to claim 1, characterized ge by means of the adjustable connection set: unit {30} of m vn ls FON to “ m track difference angle {39} between that Left wheel {11} by more than 353°, preferably more than 10° adjustable, v5 Se nA , N ae A © m platform according to claim 1 or 2, dad f \ between the 30a, 30h) enzeeiCHN at, a yachts and nope LS characterized in that the right rod part (28) articulated with the right junction (30a) of Connection unit {30} and the left articulated with the left junction (30b) of connection unit {30} is connected Platform according to any one of claims 1, characterized in that the Verbindungsel itself drivable by the actuator {31} : rod part (2 to 3, by Can unit (30} a vEeEMmEeNdes OL 5 A as N Sa Sen au Schraubgetrisbe (32, 33} has, through which the distance between rec] ten and left Connecting point (303, 30b} is adjustable. or N As Fee ba © > 8th) g } E I > Platform according to claim AiLe right connection at m a AR PZN N _ a housing {35} of protruding rech left junction ; Housing (36) of the Ververbindurum protruding left Will, with the gear {31} al are, sn a A AN A al: it Y AM VELDLNCGUNGRES mt Eriebestab {3235} formed AS platform after one of GEK standing at an angle to each other HuzDraws that the Een <> EN mn x £ Gar (302) unit Kangen {24, Claims 1 Var affiliation and around mutually pivotable arms (4 which at a distance from the Junctions {3 SD LZLCH Ad TE 7% * Angle On X E {43} between the u SA Armen (40 Axis (42) 305) © Ber 41 ZN JS an actuator (4d} is adjustable mutual pivot , at V N axis {42} from at least ng of the arms ainen actuat can be released and bi-locked, Form according to claim & between the first and synchronization gear avuchsene opposite court 5 R Da ] , {40, 41} around the axis {4% platform after a de marked that ai DR ;, thereby Yes two {A\ Bam was called 42} DD X 5 \ns ALLAN 7 v € at least one hydraulic ical with one in a cylinder {BL}, dated end TIMES AAN ugh is adjustable or its ben arm A5} works Teaser ar Varschw works Hey Dr AANZEANTZ Cru guys = KOollben : A X Aw e A er 4, characterized in that (30a) from the end of one unit (30) ebestange {24} and the from the end of one from the 7rn (303 25) from the actuator D sharp 3, thereby unit (30} KR FR one axis (42) O0, 41) has &, each ne of the 'sen, where the 41} from at least or the (40, 41} around the % 7 X or 147) marked that AN AN Sw {40,dl} a ' which a the arms HI > a 218 3, thereby unit (303 < cylinder unit N S + AO {50} arranged pistons at least one actuator position in the cylinder from at least one actuator (57) releasable and is blockable, SG, platform according to one of claims i to 8, characterized in that both the front axle assembly a. ars} Ye HA Die = en ae ne Ä wa {2} as well as the rear axle assembly {3} Ll Steerable Wheels {1i, 7) having whose wheel carrier through the Wheel carriers {12} articulated rod parts {28, 298) and an adjustable one connecting the rod parts Connection unit (30} are connected to each other, AA 15, platform according to claim 23, characterized in that You wheels (11, 7} of the front and rear axle Assembly {Z, 3) can be brought into a position in which they are tangential to a common circular line (27) Lie. 11, a motor vehicle having a platform according to any one of Ki Ka On claims I to 10. 12. Procedure for the 51st . . LA ung of the Spuraiif erenzwinkelis the 2 4 Steerable wheels {11} of an axle builder (3) of a Motor vehicle according to claim 11, characterized characterized in that the Sour difference angle between ED AAN, the wheels {11} by means of the actuator 133 44) of br Connection unit {30} is adjusted or that a Changeability of the toe difference angle from the actuator (47, 57) of the connection unit {30} is released and the toe difference angle by different Steering of the right and left wheel {11} by means of Aie wheel axles {13} acting drive and / or aa braking forces is changed and in the folio the Changeability of the toe difference angle from zA (47, 57} is blocked again. Your EALS . that for performing a trip of the motor vehicle Mr vr Ha through curves miC ul Sarah NEXT local radii of 1differential angle between the right and left bath {11} of the min 2ns one having steerable wheels adLUS Axle assembly {2} is fitted to the respective cam. On 14, drive to Aänseruch 12 or 12, through characterized in that for braking the motor vehicle he toe difference angle of the lsteerable wheels (LL} won at least one axle assembly {2, 3) on one are 7 a Z= O0 x + aa 2 To x of more than 5°, preferably more than 10° one becomes. 15. The method according to any one of claims 12 to 14, characterized bass ; characterized in that the turning of the motor vehicle Spurai 3 FE $ Dr between the wheels {11, 7} of all Axis assemblies (2, 3} are adjustable and the SAT en en Toes TO Sea Ss angular divisions de x wheels {11, 7} are adjusted so that the wheels {11, 7} are tangential to a common circular line {27},