DE102016214200A1 - Wheel suspension for a two-lane vehicle - Google Patents

Abstract

The invention relates to a wheel suspension for a vehicle wheel (3) of a two-lane vehicle, which is steered about a steering axle (L), with a wheel carrier (1) supporting the vehicle wheel (3), at a wheel carrier-side articulation point (R1) via a link 819) Vehicle structure (9) is articulated, which wheel carrier (1) has a support portion (5) on which the vehicle body (9) is supported with the interposition of a leaf spring acting as a suspension spring (7). According to the invention the connection of the Radträger-support section (5) on the leaf spring (7) with a pivot bearing (25) is realized, and the pivot bearing (25) defines together with the wheel carrier arm linkage point (R1), the steering axis (L) to the the wheel carrier (1) is pivotable in wheel steering movements.

Description

The invention relates to a suspension for a two-lane vehicle according to the preamble of claim 1 or 13 and a method for producing a vehicle or a vehicle group according to claim 14.

The suspension for a vehicle wheel steered about a steering axis can be implemented in common practice as a McPherson front axle, which has a half-shell-shaped wheel carrier for the vehicle wheel. At the upper end of the wheel carrier a wheel-guiding, substantially vertically arranged strut is screwed, which is constructed of a linear shock absorber and a radially outer suspension spring, which is realized as a helical compression spring. In the linear shock absorber, a piston rod is guided, the piston rod head is hinged body side. The wheel is assigned a lower wishbone, which is articulated at its body-side pivot points either directly on the vehicle body or on a body-side subframe. The steering axle of the suspension defined by the upper pivot point of the piston rod head and the lower, wheel carrier side pivot point of the wishbone. In such a McPherson front axle thus the strut rotates together with the wheel carrier in a wheel spin. From the DE 10 2008 013 913 A1 is exemplified such a McPherson front axle.

Instead of the above, designed as a helical compression spring suspension spring, the generic suspension for a steered vehicle wheel also acting as a suspension spring leaf spring. In this case, the vehicle body is supported via the leaf spring on a wheel carrier side support section.

From the DE 28 22 066 C2 a suspension for a steered vehicle wheel is known in which the wheel carrier is pivotally articulated to a steering axle to an axle body. The axle body has an upwardly projecting support portion, which is rigidly secured to a leaf spring on which the vehicle body can be supported.

From the DE 699 18 572 and from the DE 197 00 422 Each rotational damper are known, which are arranged along a pivot axis of a three-point link and can be acted upon with rebound and rebound movements of the suspension during driving.

The object of the invention is to provide a suspension for a two-lane vehicle, in which the suspension spring is designed as a leaf spring and which is simpler compared to the prior art. In addition, the suspension should be designed so that a conventional McPherson front axle can be installed in the vehicle without major structural adjustment measures.

The object is solved by the features of claim 1, 13 or 14. Preferred embodiments of the invention are disclosed in the subclaims.

According to the characterizing part of claim 1, the connection of the wheel carrier support section is realized on the leaf spring with a pivot bearing. The pivot bearing defines together with the wheel carrier-arm linkage point, the steering axis about which the wheel is pivoted in wheel steering movements.

By way of example, the pivot bearing can have a leaf-spring-side, sleeve-shaped hub section, in which a radially inner wheel bearing side bearing core is pivotally guided, specifically via a roller bearing.

In a technical implementation, the leaf spring may extend in alignment in the vehicle longitudinal direction and be rigidly connected to fixing points or with the interposition of vibration absorbers, for example elastomeric bearings, on the vehicle body. The wheel carrier support portion may preferably protrude vertically upward in the vehicle vertical direction, while the lower arm, in particular a wishbone extends approximately horizontally in a lower arm level and is articulated there on the wheel. The lower arm pivot point can be exemplified realized as a ball joint.

The leaf spring acting as a suspension spring can, in a preferred embodiment, form a spring-damper unit together with a rotational damper installed in the wheel suspension. The rotary damper is acted upon for shock absorption with compression and rebound movements of the suspension during driving. In a technical implementation, the rotary damper may have a damper housing designed to be non-rotatably mounted on the vehicle body and a rotor shaft mounted pivotably about a rotor axis. The rotor shaft can be acted upon by a drive lever with the inputs and rebound movements of the suspension. In this case, there may be a damping effect between the rotor shaft and the damper housing. Preferably, an electrical rotary damper may be used in which the rotor shaft cooperates with a housing-fixed stator. Depending on the control of the electric rotary damper, this can work in a damping mode, in the vehicle operation and rebound movements of Suspension are damped. Alternatively and / or additionally, the electric rotary damper can operate in a generator mode in which the rotational movement introduced into the rotary damper is converted into electrical energy.

With regard to a package optimization, the rotary damper can space-saving and with reduced component costs directly form the body-side link pivot point of the control arm. In this case, the link is rotatably connected to the rotor shaft and this acts as a drive lever of the rotary damper. The rotor axis is identical in this case with the body-side pivot axis of the control arm.

In a preferred embodiment, the body-side handlebar articulation point can be realized on the rotary damper with a rubber-metal sleeve bearing, in which a joint partner (for example, the wishbone) is connected to a bearing outer sleeve and the other joint partner (for example, the rotor shaft of the rotary damper ) is connected to a radially inner bearing core. In between, an elastomeric body can be vulcanised.

In order to ensure a rotationally fixed connection between the rotor shaft and the wishbone, a rotation lock can be formed between the outer bearing sleeve and the bearing core, which admittedly permits a relative movement of the outer bearing sleeve and the bearing core in the radial direction, but blocks a rotation between the outer bearing sleeve and the bearing core.

In a structurally simple embodiment, the rotation with respect to the bearing axis, a first pair of diametrically opposed, from the bearing outer sleeve to radially inwardly projecting blocking webs and this offset by a rotation angle of 90 ° second pair of blocking webs, which are also arranged diametrically opposite, but protrude radially from the bearing core to the outside. In addition, a vulcanized intermediate sleeve can be provided between the bearing outer sleeve and the bearing core, which provides radial guides, in which the free ends of all blocking webs are radially displaceable, but mounted rotationally fixed in the circumferential direction.

In the vehicle production of different vehicle variants, it is preferable to use as many identical parts in the production of different vehicle variants in order to reduce the component cost. Against this background, the suspension can be designed so that in a first variant of the vehicle the wheel carrier is fitted with the leaf spring acting as a suspension spring and in a second vehicle variant instead of a conventional McPherson front axle is installed, in which the wheel carrier instead of the support section has a strut , which is constructed of a helical compression spring acting as a suspension spring and a linear shock absorber. In this case, a strut-side piston rod head is articulated via a pivot bearing on a strut tower of the vehicle body. The vehicle body has in this case, both leaf spring attachment points and on the spring dome an attachment point for the strut of the McPherson front axle. In the above second vehicle variant, the leaf spring attachment points remain inoperative.

The advantageous embodiments and / or further developments of the invention explained above and / or reproduced in the dependent claims can be used individually or else in any desired combination with one another, for example in the case of clear dependencies or incompatible alternatives.

The invention and its advantageous embodiments and further developments and advantages thereof are explained in more detail below with reference to drawings.

Show it:

1 in a view from below a suspension for a steered vehicle according to a first vehicle variant;

2 in a perspective view from above the suspension; and

3 a rubber-metal sleeve bearing, with a body-side handlebar pivot point is realized; and

4 in a side view realized as a conventional McPherson front axle suspension according to a second vehicle variant.

In the 1 and 2 is a suspension for a front axle according to a first variant of the vehicle I shown. The suspension has a half-shell-shaped wheel carrier 1 for one only in the 4 indicated front wheel 3 on. At one in the vehicle vertical direction z upper end of the wheel carrier 1 protrudes a substantially vertically arranged support section 5 on, with the interposition of acting as a suspension spring leaf spring 7 the vehicle body 9 is supported. In the 1 and 2 is the vehicle body 9 shown as a welding group, in which a body side member 11 on a strut dome 13 and a wheelhouse structure is connected. In the vehicle transverse direction y within the wheel house structure is the leaf spring 7 positioned and aligned in the vehicle longitudinal direction x aligned. The Indian 2 shown vehicle body 9 points both attachment points 15 for connecting the leaf spring 7 on the vehicle body 9 as well as an attachment point 17 in the body-side strut tower 13 on. These remain however in the in the 1 and 2 shown first vehicle variant I function.

The wheel carrier 1 is a lower transverse or wishbone 19 assigned to the body-side attachment points A1 and A2 respectively on the vehicle body 9 is articulated and at a wheel carrier lower pivot point R1 on the wheel 1 is articulated. The wheel carrier lower pivot point R1 is in the 1 and 2 realized as a ball joint. Like from the 2 goes on, is on the wheel 1 a steering arm 21 molded, to which a steering device, not shown, of the vehicle is connectable. Moreover, in the 2 a stabilizer via a coupling rod 23 at the lower wishbone 19 supported.

In the 1 and 2 is the connection of the wheel carrier support section 5 on the leaf spring 7 with a pivot bearing 25 realized that together with the wheel carrier-side lower link pivot point R1 a steering axis L ( 2 ) defines the wheel carrier 1 is pivotable at wheel steering movements.

According to the 1 and 2 has the wishbone 19 a clearance 27 in which an electric rotary damper 29 is arranged, which together with the leaf spring 7 forms a spring-damper unit. The rotary damper 29 is with its damper housing 31 rotatably on the vehicle body 9 attached. The pivotable about a rotor axis R in the damper housing 31 mounted rotor shaft is rotatably to form the body-side pivot point A1 with the wishbone 19 connected so that the wishbone 19 as the drive lever of the rotary damper 29 acts. The rotor axis R is in the 1 or 2 aligned in the vehicle longitudinal direction x.

The body-side link arm A1 between the wishbone 19 and the vehicle body 9 is by means of a in the 3 shown rubber-metal sleeve bearing 35 realized that one rotationally fixed to the wishbone 19 Tailored bearing outer sleeve 37 and a radially inner bearing core 39 having. The radially inner bearing core 39 is rotatable and coaxial with the rotor shaft of the rotary damper 29 is connected. In the annular gap between the bearing core 39 and the outer bearing sleeve 37 is an elastomeric body 41 with integrated intermediate sleeve 43 vulcanized, which is part of a rotation.

The anti-rotation has in the 3 a first pair of blocking bars 45 . 47 which are diametrically opposed to each other with respect to the rotor axis R and from the bearing outer sleeve 37 protrude radially inward. In addition, the anti-rotation device - offset by a rotation angle of 90 ° - has a second pair of blocking webs 49 . 51 which are diametrically opposed to each other with respect to the rotor axis R and from the bearing core 39 protrude radially outward. All blocking bars 45 . 47 . 49 . 51 are with their free ends in radial guides 53 the intermediate sleeve 43 radially displaceable, but mounted rotationally fixed in the circumferential direction. In this way, despite a rotationally fixed connection between the rotor shaft and the wishbone 19 Achieved an elastokinematic behavior on the first body-side link arm A1.

In the 4 is one in a second vehicle variant II mounted suspension, which is realized as a conventional McPherson front axle, in which the wheel carrier 1 instead of the support section 5 one from the suspension spring 55 and a linear shock absorber 57 having formed shock absorber. A spring-side piston rod end 59 is about a not shown pivot bearing on in the 2 shown strut attachment point 17 in the strut dome 13 of the vehicle body 9 connectable. The piston rod end pivot bearing defines together with the lower wheel carrier arm linkage point R1, the steering axis L. In such a second vehicle variant II on the other hand, the leaf spring attachment points remain 15 function.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008013913 A1 [0002]
• DE 2822066 C2 [0004]
• DE 69918572 [0005]
• DE 19700422 [0005]

Claims (14)

Wheel suspension for a vehicle wheel steered around a steering axle (L) ( 3 ) of a two-lane vehicle, with a vehicle wheel ( 3 ) carrying wheel carrier ( 1 ), which at a wheel carrier-side articulation point (R1) via a handlebar ( 19 ) on a vehicle body ( 9 ), which wheel carrier ( 1 ) a support section ( 5 ), on which, with the interposition of a leaf spring acting as a suspension spring ( 7 ) the vehicle body ( 9 ) is supported, characterized in that the connection of the Radträger-Tragabschnitts ( 5 ) on the leaf spring ( 7 ) with a pivot bearing ( 25 ) is realized, and that the pivot bearing ( 25 ) together with the wheel carrier-linkage articulation point (R1) defines the steering axis (L) to which the wheel carrier ( 1 ) is pivotable in wheel steering movements. Wheel suspension according to claim 1, characterized in that the pivot bearing ( 25 ) Has a leaf spring-side sleeve-shaped hub portion, in which radially inwardly a Radträgerseitiger bearing core is pivotally guided. Wheel suspension according to claim 1 or 2, characterized in that the leaf spring ( 7 ) at attachment points ( 15 ) rigid or with the interposition of vibration absorbers on the vehicle body ( 9 ) is attached. Wheel suspension according to claim 1, 2 or 3, characterized in that the Radträger-Tragabschnitt ( 5 ) is extended in the vehicle vertical direction (z) upwards, and / or that the handlebar articulation points (R1) at the bottom of the wheel carrier ( 1 ) is trained. Wheel suspension according to one of the preceding claims, characterized in that the leaf spring ( 7 ) extends in the vehicle longitudinal direction (x). Wheel suspension according to one of the preceding claims, characterized in that the leaf spring acting as a suspension spring ( 7 ) together with a rotational damper installed in the wheel suspension ( 29 ) forms a spring-damper unit, which rotational damper ( 29 ) can be acted upon for shock absorption with rebound and rebound movements of the suspension during driving. Wheel suspension according to claim 6, characterized in that the rotational damper ( 29 ) a rotationally fixed to the vehicle body ( 9 ) fixed damper housing ( 31 ) and a rotor shaft pivotally mounted therein about a rotor axis (R), which is drivable via a drive lever with the rebound and rebound movements of the suspension, and that the damper action between the rotor shaft and the damper housing ( 31 ), and in particular that the rotary damper ( 29 ) is an electrical rotary damper, wherein the rotor shaft cooperates with a housing fixed stator. Wheel suspension according to claim 6 or 7, characterized in that the rotor axis (R) in the vehicle longitudinal direction (x) is aligned. Wheel suspension according to claim 6, 7 or 8, characterized in that for forming a body-side link arm point (A1) of the handlebar ( 19 ) is rotatably connected to the rotor shaft and as a drive lever of the rotary damper ( 29 ) acts. Wheel suspension according to claim 9, characterized in that the body-side linkage pivot point (A1) with a rubber-metal sleeve bearing ( 35 ) is realized, in which a joint partner, in particular the handlebar ( 19 ), on an outer bearing sleeve ( 37 ) and the other joint partner, in particular the rotor shaft, on a radially inner bearing core ( 39 ) and in between an elastomeric body ( 41 ) is arranged. Wheel suspension according to claim 10, characterized in that for a rotationally fixed connection of the handlebar ( 19 ) on the rotor shaft a rotation between the bearing outer sleeve ( 37 ) and the storage core ( 39 ) is formed, which is a rotation between the bearing outer sleeve ( 37 ) and the storage core ( 39 ) is blocked around the rotor axis (R) but allows relative movement in the radial direction. Wheel suspension according to claim 11, characterized in that the rotation with respect to the rotor axis (R) a first pair of diametrically opposite, from the outer bearing sleeve ( 37 ) to radially inwardly projecting blocking webs ( 45 . 47 ) and offset by 90 ° a second pair of diametrically opposite, from the bearing core ( 39 ) radially outwardly projecting blocking webs ( 49 . 51 ), and that the blocking webs ( 45 . 47 . 49 . 51 ) with their free ends in radial guides ( 53 ) an intermediate sleeve ( 43 ) are radially displaceable, but are mounted rotationally fixed in the circumferential direction. Wheel suspension, characterized in that in a first vehicle variant ( I ) the suspension is provided according to one of the preceding claims, and that in a second vehicle variant ( II ) the suspension is designed as a McPherson front axle, in which the wheel carrier ( 1 ) instead of the support section ( 5 ) a suspension spring ( 55 ) and linear shock absorbers ( 57 ) formed spring strut, and that a spring-side piston rod end ( 59 ) via a pivot bearing on a strut dome ( 13 ) of the vehicle body ( 9 ) is articulated, and that in the second Vehicle variant ( II ) the leaf spring attachment points ( 15 ) remain functionless. Method for producing a vehicle or one of vehicle variants ( I . II ) existing vehicle group having a suspension according to one of the preceding claims.

Images