Vehicle axle having a centrally arranged drive unit

Patent metadata

Field	Value
Publication number	US-11167609-B2
Application number	US-201816640099-A
Country	US
Kind code	B2
Filing date	Jul 16, 2018
Priority date	Aug 22, 2017
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

A vehicle axle with a centrally arranged drive unit and a wheel suspension which has a wheel carrier for holding a wheel, a lower wheel-guiding control arm for the articulated connection of the carrier to a vehicle body, a camber link that connects the carrier to the body and steering unit for steering the wheel. The carrier and control arm are connected directly, in a first connection area, and indirectly via an integral link, in a second connection area, so that the carrier can pivot relative to the control arm about a steering axis. The control arm can be connected to the body in forward and rear areas, and has a rotational axis that extends obliquely relative to the longitudinal direction of the vehicle. All connection areas of the control arm are positioned outside the centrally arranged drive unit relative to the transverse direction of the vehicle.

First claim

The invention claimed is:

1. A vehicle axle comprising:
a centrally arranged drive,
a wheel suspension,
the wheel suspension comprising a wheel carrier for holding a wheel of a vehicle,
a lower wheel-guiding control arm for articulated connection of the wheel carrier to a vehicle body,
a camber link for connecting the wheel carrier to the vehicle body,
a steering means for steering the wheel,
the wheel carrier and the wheel-guiding control arm being directly connected, in a first connection area, and indirectly connected, via an integral link, in a second connection area, such that the wheel carrier is pivotable relative to the wheel-guiding control arm about a steering axis,
the wheel-guiding control arm being connectable to the vehicle body in a forward area and in a rear area, and has a rotational axis extending obliquely relative to the longitudinal direction of the vehicle, and
all connection areas of the wheel-guiding control arm ( 4 ) being positioned outside the centrally arranged drive unit relative to a transverse direction of the vehicle.

2. The vehicle axle according to claim 1 , wherein the drive unit comprises at least one electric drive motor, and a drive connection, for driving the wheel, is provided between the drive unit and the wheel.

3. The vehicle axle according to claim 1 , wherein a chassis element, articulated on a body side, is directly connected to the wheel carrier.

4. The vehicle axle according to claim 3 , wherein the chassis element is a damper.

5. The vehicle axle according to claim 3 , wherein, relative to the longitudinal direction of the vehicle, the chassis element is positioned either ahead of a middle of the wheel or above a driveshaft that drives the wheel ( 3 ).

6. The vehicle axle according to claim 3 , wherein, relative to the wheel carrier, the connection on the wheel carrier side of the chassis element is formed close to the first connection area.

7. The vehicle axle according to claim 1 , wherein, relative to the longitudinal direction of the vehicle, the first connection area is located close to the middle of the wheel and the second connection area is located behind the middle of the wheel.

8. The vehicle axle according to claim 1 , wherein the wheel-guiding control arm is supported against the vehicle body by a spring that extends substantially in a vertical direction of the vehicle.

9. The vehicle axle according to claim 8 , wherein, relative to the longitudinal direction of the vehicle, the spring is positioned behind at least one of a middle of the wheel and a driveshaft that drives the wheel.

10. The vehicle axle according to claim 8 , wherein the wheel suspension has a spring ratio of between 0.5 and 1.0, and the spring ratio is defined as a ratio between a distance of the spring from the rotational axis and a distance of the wheel from the rotational axis.

11. The vehicle axle according to claim 1 , wherein, relative to a vertical direction of the vehicle, the wheel-guiding control arm is in a lower control arm plane, and the camber link, that connects the wheel carrier to the vehicle body ( 6 ), is in a higher control arm plane above the lower control arm plane.

12. The vehicle axle according to claim 1 , wherein the integral link is arranged substantially inside the wheel.

13. The vehicle axle according to claim 1 , wherein, in an un-steered condition of the wheel, the integral link is aligned substantially in a vertical direction of the vehicle.

14. The vehicle axle according to claim 1 , wherein, at a first link connection, the integral link is articulated to the wheel-guiding control arm and, at a second link connection, the integral link is articulated to the wheel carrier.

15. The vehicle axle according to claim 1 , wherein the wheel is drivable by the drive unit via a shaft that extends substantially in the transverse direction of the vehicle, and the shaft, relative to the longitudinal direction of the vehicle, extends between a spring and a chassis element.

16. A vehicle axle that extends in a transverse direction of a vehicle that is perpendicular to a central longitudinal axis of the vehicle, the vehicle axle comprising:
an electric drive unit being arranged in the transverse direction, adjacent the central longitudinal axis of the vehicle;
a wheel suspension having a wheel carrier on which a wheel of the vehicle being mounted, a lower wheel-guiding control arm via which the wheel carrier being articulatably connected to a vehicle body, a camber link via which the wheel carrier being connectable to the vehicle body, and steering means for steering the wheel;
the wheel carrier and the wheel-guiding control arm being directly connected, in a first connection area, and indirectly connected, via an integral link in a second connection area, so that the wheel carrier being pivotable relative to the wheel-guiding control arm about a steering axis;
the wheel-guiding control arm being connectable in a forward area and in a rear area to the vehicle body, and the wheel-guiding control arm having a rotational axis that extends obliquely relative to the longitudinal axis of the vehicle; and
the first and the second connection areas and the forward and the rear areas of the wheel-guiding control arm being positioned in the transverse direction outside the electric drive unit.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Wallgren Klaus
• Heidsieck Knut

Classifications

• B60G3/20 Primary

  all arms being rigid · CPC title

• B60G2200/18

  Multilink suspensions, e.g. elastokinematic arrangements · CPC title

• B60G2204/129

  Damper mount on wheel suspension or knuckle · CPC title

• B60G2206/121

  the arm having an H or X-shape · CPC title

• B60G2206/50

  Constructional features of wheel supports or knuckles, e.g. steering knuckles, spindle attachments · CPC title