DE102005038625A1 - Single wheel suspension for vehicles comprises rectangular telescopic longitudinal and transversal connecting rods which spring in and out using a pin fixed to the part of the connecting rods on the wheel side - Google Patents

Abstract

Single wheel suspension comprises rectangular telescopic longitudinal and transversal connecting rods which spring in and out using a pin (6) fixed to the part of the connecting rods on the wheel side. The pin interacts with a radial cam arranged in a console. Preferred Features: The console for the transversal connecting rod hinges with the radial cam in one plane and moves using a power drive.

Description

Become Along- and transverse link of a road vehicle, the usual in a plane are movably attached to the chassis articulated, When moving in and rebound, they describe one each Arc.

from that follows that both to lane and fall and a trailing arm arrangement to wheelbase changes comes.

Trailing arm are when the vehicle moves forward or back, for the support of the chassis in overcoming of bumps and wishbones for supporting in curves important.

A simultaneous arrangement of longitudinal and Wishbones on the same chassis would be optimal.

There However, both handlebars describe a circular arc during compression and rebound, their wheel-side ends move away from each other and thus can at larger than minimum spring travel can not be combined.

With Help from age-susceptible Rubber or plastic elements both on the bodywork as well the wheel-side joints of the handlebars can be a certain Measure in the Achieve rebound and rebound.

This Measure is however for Motor vehicles in practice too low.

Also prevented a naturally elastic Storage of this kind an absolutely necessary exact bike guidance.

What Does it help, if on the line the optimal effect Trailing arm and in curves the then optimally acting wishbone assume the support work, if then the actual bike guidance is undetermined.

For the rear axle of cars and some van models then take you to the benefits from Längs- and wish to combine wishbones, like semi-trailing arms.

There in these, however, during compression and rebound to lane, camber and Wheelbase changes comes can the principal advantages of longitudinal and Wishbone itself be used only to a small extent.

specially on snow and ice, a semi-trailed vehicle quickly breaks in turns out and relax barely catch it.

One Example of this is the Mercedes 123 series.

With a so-called multi-link axle, also called a multi-link axle, one is better off in such situations.

This complicated system, however, leaves only small spring travel too.

Further have to the bearings with age-prone, elastic material be surrounded, which after a certain period of substantial replacement costs caused.

The Problem is erfindungsmäßig by the solved in claim 1 features.

The particular advantages of the invention are that now when rebounding and rebounding in the usual suspension travel the wheel side Ends of the longitudinal and wishbone no longer move away from each other and thus a proper wheel attachment with precise guidance without age-susceptible elastic bearings possible is.

In Curves with high lateral acceleration, the vehicle tilts, which Screw or torsion bar springs has, after the outside of the curve.

This leads to a positive fall of the outside wheels and to that these due to the then unfavorable Do not support the roadway position correctly.

To is still an unfavorable Tire deformation that exacerbates this disadvantage.

With the features mentioned in claim 2 this problem solved according to the invention.

By the power-driven by a joint movable brackets for the cams the wishbone can be positive occurring on the outside of the curve Fall of the wheels be converted into a negative.

The on the inside of the curve located wheels, usually a would have a negative fall, can now switched to a positive fall.

there can also be due to different fall changes both on the left as well as the right side of the car a possibly desired track width change be achieved.

Further can from the previous roll profile in the footprints of the Tires again in favor of a rounder cross-section, much like in the motorcycle tires, be abandoned.

This allows just like the latest high quality bike and motorcycle tires in the tread center a hard and wear-resistant and laterally a soft and particularly grippy rubber compound.

There the footprint already lower because of the shape decreases due to the lower friction the fuel consumption.

It also gives even a lower ride comfort improvement, as by the lower footprint uneven floors much faster deform the tire tread at the point of contact, and a tire deformation acts as a suspension.

At the sharp braking, as well as in fast corners, causes a deformation of the tires, now with the tire parts with the softer and more adhesive Rubber compound touching the ground and thus shorter Braking distances are achieved.

at the fall change touching the tire in curves also the off-center, with a soft rubber compound provided tread parts the soil, which then leads to better adhesion and increase of potential Cornering speed leads.

at an air or hydropneumatic suspension with built-in side tilt suppression in Curves with the help of a pressure increase in the spring elements on the outside of the curve is only one clear less rotation of the consoles for the wishbone length change necessary.

at high cornering speeds is the limit of static friction in Curves reached.

The Training according to claim 3 allows this Haftreibungsgrenze to move again.

This happens by assembling your own, in two levels with the help a power-driven sliding console, on which now the body-side Articulation points of the longitudinal and wishbones together with the consoles with the cams, with the help of those the handlebars in their length be changed in the compression and rebound the requirements accordingly can, are attached, a wheelbase change and a further enlargement of the Gauge.

Around the components mounted on the console also one above unimpeded function, is the chassis, here shown as a platform, with appropriate To provide cutouts.

When Advantage results in a further increase in the curve limit speed, because the vehicle is now placed on an even larger base.

One embodiment The invention is illustrated in the drawing and will be described below described in more detail.

It demonstrate

1 the front left side of the chassis 1 with the articulated console 2 , which formed as a groove guide curve 3 includes.

The chassis 1 is in the range of the console 2 left out. The attachment takes place via the articulated in a plane joint 4 ,

At the top of the console 2 is the joint 5 ,

In the guide groove 3 the pin engages 6 of the inner part 7 of the control arm 8th ,

This one is by the pin 6 over the guide groove 3 controlled, in the outer part 8th the wishbone inserted.

At the end is the body-side joint 9 ,

The wheel-side end of the inner wishbone part 7 carries the joint 10 to which the wheel carrier is attached 11 followed.

This carries the wheel 12 ,

It is (shown schematically here), if necessary from the drive shaft 13 driven.

Generally, in this independent suspension, the drive shaft 13 just as with longitudinal, transverse, oblique and Raumlenkereinzelradaufhängungen executed with joints and slide pieces.

From the joint 5 the mobile console 2 leads a pull or push rod 13 to the power drive 14 , with the help of the joint 15 movable on a pedestal, resting on the chassis 1 is fixed.

From the power drive leads a cable 21 to the calculator 22 , which determines and controls the required movements based on the lateral acceleration in curves.

The trailing arm consists of an inner part 17 that of a cones 6 which is in the guide groove 3 the console 20 that in contrast to the console 2 rigid with the chassis 1 is connected, engages, and is guided by the compression and rebound accordingly, wherein 17 in the outer part of the trailing arm 18 pushed in or pulled out.

The inner part of the trailing arm 17 is done with the help of the ball joint 19 with the wheel carrier 11 connected.

The pin 6 which is in the guide groove of the console 20 engages, corresponds in dimensioning exactly the pin 6 of the component 7 , The springs that support the wheel to the chassis were omitted here. They are arranged analogously to the previous independent wheel suspensions.

2 the longitudinal and transverse links in section

The parts 7 and 8th must have a square cross-section, most meaningful a square, otherwise there is a risk that the pin 6 out of the guide groove 3 unscrewing.

Analogously, this also applies to the parts 17 and 18 , which of the dimensions depending on the intended use of the vehicle clearly from the parts 7 and 8th can distinguish.

3 the arrangement of the component 17 to the wheel carrier 11 on average.

The component 17 ends in a ball joint 19 , which in turn is in 11 is movably attached.

4 the determination of the control curve 3 based on the mounted wheel 12 during compression and rebound. (shown here for the wishbone)

For this purpose, the joint must 4 the console 2 for the wishbone 7 and 8th be blocked.

The wheel 12 is guided by means of plates attached to the side surfaces so that it can neither tilt nor move to the side when raising or lowering.

Theoretically, you would now only the pin 6 paint with a paint and the console 2 to be touched by the up or down moving pin to get the control curve.

Appropriately, however, closes on the pin 6 a drawing device, which the control curve 3 exactly on the console 2 draws on.

Corresponding In the drawing, the cam is now milled.

In the control curve determination for the trailing arm 17 and 18 you proceed analogously.

Here, a lack of joint eliminates a blockade of the console 20 ,

The Plates that should guide the up and down moving wheel now have to twisted 90 degrees and of course be placed further apart, i.e., so that they, themselves Standing vertically, touch the front and rear tread.

The Wheel can not move forward or roll backwards.

5 the graphic determination of the control curve 3 ,

To you need a coordinate system.

The fulcrum 9 lies on the vertical axis.

The wheel 12 on the transverse axis.

Because the outer parts of the control arm 8th and trailing arm 18 always remain the same length when compression and rebound, results for the viewer during compression and rebound a change in length of the components 7 and 17 ,

This is due to the fact that thereby 7 in 8th respectively. 17 in 18 pushed in or pulled out.

So you turn on the coordinate system 9 a partial circle.

You also pull parallel to the vertical, the through 9 goes, another perpendicular, which runs to the right of the circular line. At her the wheel is running 12 along.

From 9 starting from now drawing numerous lines that intersect this parallel.

from Intersection of the individual lines with the parallels starting draws one with the compass one intersection with the line.

This point of intersection, which lies to the right of the circle, represents the particular point that the pin 6 marked at a certain handlebar position, dar.

If you now connect the intersections with each other, you get the control curve 3

6 the front left view of the chassis 1 , Wherein the longitudinal and transverse link together with the consoles and the power drive for the console 2 no longer on the chassis 1 but on its own console 25 are mounted.

The chassis 1 is to ensure the unrestricted function of the independent suspension, broken accordingly.

From the power drive 14 leads a cable 21 to the control unit 22 , It controls over 14 and 13 the movement of 2 and thus 3 , These control pulses are triggered by the respective lateral acceleration.

Becomes 14 activated, it comes to a tilting of the wheel 12 around the longitudinal axis.

On this way, the fall is set.

Also from the power drives 23 and 24 each leads a cable 21 to the control unit 22 ,

Basis of the control unit 22 outgoing effect 23 and 24 is in turn the lateral acceleration.

If this is correspondingly high, for example in fast-moving curves, the upper part of the console is displaced 25 to the left. In the shift, the upper part of 25 through the sliding guides attached to the lower part 27 guided.

As a result, the left front wheel moves to the left.

Since the right side (not shown here) the 6 mirror image corresponds, would in a quick left turn the wheel 12 hike fore right to right.

In this case would come it to a track broadening.

The push or pull rod 26 combines 23 with the lower part of the console 25 ,

In addition, in fast turns the lower part of 25 along with the upper one to the front.

Here take over the sliding guides 28 which on 1 are attached, the guide.

It will in this case with the help of the power drive 24 which is on the lower part of 25 is fixed, and in turn with a push rod 26 , which in this case affect the chassis 1 supports, achieved a wheelbase enlargement.

For example, if in a left turn the power drive 14 is set in motion, the push rod moves 13 the left front suspension to the right.

The left front wheel moves, ie, it tilts to the left. The right front wheel moves the push rod 13 however, to the left.

The right front wheel tilts to the left.

Left In the front, the fall is therefore positive and negative on the right.

at the rear wheels is achieved the same with this arrangement.

7 the cut through the platform 25 and the connection with the chassis 1 ,

The Elements mounted on the top or bottom are indicated by numbers shown.

Claims (3)

Curved and articulated, depending on the requirement trace, fall and radstandkonstante, or in track, camber and track or even wheelbase, camber and track variable independent suspension on longitudinal and transverse control arms for motor vehicles, characterized in that the telescopically inserted and thus extractable or collapsible, rectangular in cross-section longitudinal and transverse link during compression and rebound by means of a pin which is attached to the wheel-side part of the longitudinal or transverse link, and engages in a incorporated into a console cam, their length change in a well-defined way. independent suspension according to claim 1, characterized in that the consoles responsible for the wishbone with the cams articulated in a plane with power drive mobile are executed. Independent wheel suspension according to claim 1, and 2, characterized in that the body-side pivot points of the longitudinal and transverse link together with the provided with the incorporated cams brackets for the change in length of the longitudinal and transverse handlebars are mounted on a movable, in two levels power-driven, instead of on the chassis.