DE102013008700B4 - Wheel suspension for a wheel of a front axle of a motor vehicle - Google Patents

Abstract

Wheel suspension (10) for a wheel of a front axle of a motor vehicle, comprising - a wheel carrier (12), - at least one wheel guide element (14) mounted on the vehicle body, guiding the wheel carrier (12), and -a fixed to the wheel carrier (12) connected spring-damper strut (16), wherein the body-side the Radführungselement (14) with interposition of a lockable telescopic rod (20) and a between Radführungselement (14) and telescopic rod (20) arranged lockable rotary joint (18) is mounted on the motor vehicle body, characterized in that the spring-damper strut (16) and the telescopic rod (20) are arranged such that their center lines (L, L) run parallel to one another and that each wheel of the front axle is assigned a drive unit (22) and that the drive unit (22) is mounted on the telescopic rod (20), wherein the drive unit (22) is designed as an electric motor with gear.

Description

The invention relates to a suspension for a wheel of a front axle of a motor vehicle according to the specified in the preamble of claim 1. Art.

A suspension, in particular a suspension steered motor vehicle front wheels, is from the generic font, DE 29 32 699 A1 , known. The disclosed suspension is characterized in that the wheel carrier of the opposing wheels are guided by a respective guide link, in particular transverse or oblique link, and by mediating a mainly vertically arranged, telescopically extendable or shortenable damper strut with respect to the vehicle superstructure and is provided at different movements of the opposite wheels of the axle counteracting stabilizer. In a known manner, in the disclosed suspension, the ground clearance of the vehicle is defined by the body-side attachment of the lower arm, so that upon compression of a wheel, the remaining ground clearance reduced by the same amount by which the wheel springs. That is, during compression occurs a loss of ground clearance.

The US 4,958,584 A discloses an amphibious vehicle in which the suspension allows lifting and lowering of the wheels.

The DE 699 34 671 T2 discloses an adjustable vehicle suspension wherein the vertical and lateral position of the steering knuckle assembly is adjustable to allow for continuously adjustable ground clearance or wheel width of the vehicle.

The invention has the object of providing a suspension for a wheel of a front axle of a motor vehicle according to the type specified in the preamble of claim 1 such that during compression a constant ground clearance is maintained.

This object is achieved by the characterizing features of claim 1 in conjunction with its generic features.

The dependent claims form advantageous developments of the invention.

In a known manner, the suspension for a wheel of a front axle of a motor vehicle comprises a wheel carrier, at least one body-mounted on the vehicle body, the wheel carrier leading wheel guide, and a fixedly connected to the wheel carrier spring-strut. On the body side, the wheel guide element is mounted on the motor vehicle body with the interposition of a lockable telescopic rod and a blockable rotary joint arranged between the wheel guide element and the telescopic rod.

According to the invention, the spring damper strut and the telescopic rod are arranged in such a way that their center lines run parallel to each other. In addition, each wheel of the front axle is assigned a drive unit, wherein the drive unit mounted on the / the telescopic rod (s) and the drive unit is designed as an electric motor with gear. The inventive design of the suspension for a wheel of a front axle now two different modes are adjustable, namely a "normal mode" for driving on a paved road and a "terrain mode", u.U. a greater ground clearance is necessary.

In "normal mode" the telescopic rod is blocked, while the arranged between the wheel guide element and telescopic rod swivel joint is free to move. The consequence of this is that the suspension hangs in and out like a well-known axle and reduces the ground clearance when rebounding.

By contrast, in "off-road mode", the pivot bearing is blocked in an axis-kinematically optimal position, while the telescopic pole is not blocked, i. is freely telescopic. The consequence of this is that during compression, the system consisting of telescopic rod, wishbone and wheel carrier and the spring-damper strut move on parallel tracks upwards. That the ground clearance remains constant. Due to the provision of the drive unit directly on the / the telescopic rod (s) ensures that in the off-road mode and the drive unit mitfedert so that the constant ground clearance is ensured. Due to the design of the drive unit as an electric motor with gear, a smaller space requirement is also ensured in an advantageous manner.

Preferably, the wheel guide element is designed as a wishbone in the form of a wishbone, which is mounted on the body side by means of two pivot bearings on two telescopic rods.

Preferably, a control / control device is further provided, via which the blocking of telescopic rod (s) and swivel (s) (s) is controlled / regulated.

Further advantages and possible applications of the present invention will become apparent from the following description in conjunction with the embodiment shown in the drawing.

The invention will be described in more detail below with reference to the embodiment shown in the drawing.

In the description, the claims, and the drawing, the terms and associated reference numerals used in the list of reference numerals below are used.

• 1 eine schematische Darstellung der erfindungsgemäßen Radaufhängung im „Normalmodus“, und
• 2 die Radaufhängung aus 1 im „Geländemodus“ .

In the drawing:

• 1 a schematic representation of the suspension of the invention in the "normal mode", and
• 2 the suspension from 1 in "off-road mode".

1 shows a total with the reference numeral 10 designated wheel suspension for a wheel of a front axle of a motor vehicle. The illustrated Vorderachskonstruktion is a so-called McPherson front axle.

In a known manner, this Vorderachskonstruktion has a wheel 12 on top of a wishbone 14 as well as one with the wheel carrier 12 firmly connected spring-strut 16 is guided. On a representation of the wheel was omitted in the present case for reasons of clarity.

In the wishbone shown here 14 it is a so-called wishbone, the body side is attached via two bearings on the vehicle body.

As 1 it can be seen here is the body-side end of the control arm 14 by means of a swivel joint 18 on a telescopic pole 20 hinged, which in turn is attached to the vehicle body / stored.

Only for the sake of completeness it is pointed out that due to the training of the control arm 14 as a wishbone, the control arm has two body-side bearings, ie that on the body side of the wishbone 14 over two swivels 18 and two telescopic poles is mounted on the vehicle body.

Furthermore, how are 1 it can be seen, the spring damper leg 16 as well as the telescopic poles 20 arranged such that the center line L ₁ of the spring-strut-leg as well as the centerlines L ₂ the telescopic rods run parallel to each other.

In addition, one at the / the telescopic poles 20 stored drive unit 22 intended. The drive shaft 24 of the drive unit 22 is in a known manner with the - not shown here for reasons of clarity - wheel in operative connection.

Furthermore, a control / control device is provided, by means of a targeted blocking of the swivel joints 18 or the telescopic rod (s) 20 is adjustable.

At the in 1 shown "normal mode" are the telescopic rods 20 blocked, ie not telescopic, while the between wishbones 14 and telescopic rods 20 arranged hinges 18 are freely rotatable. This has the effect that during compression and rebound only the spring-strut 16 cushioned so that reduces the ground clearance during compression in a known manner.

Now, as in 2 shown, the so-called "off-road mode" set, are the hinges 18 blocked while the telescopic rods 20 are made freely telescopic.

The effect of this is that now when compressing the whole system, telescopic poles 20 , Drive units 22 and spring shock absorber leg 16 on the parallel tracks L ₁ . L ₂ move upwards. This leaves - like 2 It can be seen clearly, the ground clearance constant, since both wishbones 14 with wishbone bearing as well as the telescopic rod fixed drive unit 22 is moved upwards.

LIST OF REFERENCE NUMBERS

10

Arm

12

wheel carrier

14

wishbone

16

Spring-damper strut

18

swivel

20

telescopic rod

22

power unit

24

drive shaft

L ₁

Centerline of the spring-shock absorber leg

L ₂

Center line of the telescopic rod (s)

Claims (3)

Wheel suspension (10) for a wheel of a front axle of a motor vehicle, comprising - a wheel carrier (12); - At least one body side mounted on the vehicle body, the wheel carrier (12) leading wheel guide element (14), and - a fixed to the wheel carrier (12) connected spring-damper strut (16), wherein on the body side, the wheel guide element (14) with interposition of a lockable telescopic rod (20) and a between Radführungselement (14) and telescopic rod (20) arranged lockable rotary joint (18) is mounted on the motor vehicle body, characterized in that the spring-damper strut (16) and the telescopic rod (20) are arranged such that their center lines (L ₁ , L ₂ ) each extend parallel to each other and that each wheel of the front axle is associated with a drive unit (22), and that the drive unit (22) on the telescopic rod (20) is mounted, wherein the drive unit (22) is designed as an electric motor with gear. Suspension (10) to Claim 1 , characterized in that the wheel guide element is designed as a transverse link (14) in the form of a wishbone. Suspension (10) to Claim 1 or 2 , characterized in that a control / control device is provided, via which the blocking of the telescopic rod (20) and pivot (18) is controlled / regulated.

Images