Arrangement of a rear axle module on a vehicle body, and a rear axle module for such an arrangement and a two-axle, two-track vehicle which is at least partially driveable by means of an electric motor and has such an arrangement

Patent metadata

Field	Value
Publication number	US-10179609-B2
Application number	US-201514959436-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Jun 6, 2013
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

An arrangement of a rear axle module on a two-axle, two-track vehicle which is at least partially electrically driveable by an electric motor is provided in which a rear axle bracket designed for the fastening of wheel-guiding links of a rear axle and a housing for accommodating components for providing electrical energy together form the module, with the housing arranged in a front region of the rear axle module. The rear axle module includes bearing brackets by which the module is connected from below to the vehicle body, including two rear axle bracket bearings which are to the rear of the rear axle module with respect to the direction of travel, two central rear axle bracket bearings arranged in a central region of the rear axle module, and two front bearings arranged on the housing in the front region of the rear axle module.

First claim

What is claimed is:

1. A rear-axle module for a two-axle, two-track vehicle which is at least partially electrically driveable by an electric motor, comprising:
a rear-axle member configured to receive wheel-controlling links of a rear axle; and
a housing configured to receive electrical energy-generating components,
wherein
the housing is arranged in a front region of the rear-axle module, the front region facing in a forward vehicle travel direction when the rear axle module is in an installed position on the vehicle,
the housing is at least one of connected to and integrated with the rear-axle member,
the rear-axle module is configured to be attached to the vehicle by
two rear-axle member bearings arranged in a rear region of the rear-axle module opposite the front region,
two middle rear-axle member bearings arranged in a middle region of the rear-axle module between the front and rear regions, and
two front bearings arranged on the housing in the front region,

the housing has an upper shell and a lower shell,
the housing is formed with two housing hulls arranged substantially parallel to the forward vehicle direction when the rear-axle module is in the installed position in the vehicle,
each of the two housing hulls includes one of the two front bearings, and
at least one of the wheel-controlling links is located behind the housing in the rear region.

2. The rear-axle module as claimed in claim 1 , wherein the rear-axle module is further configured to be attached to the vehicle by the two front bearings arranged on the housing and configured to be attached to the vehicle in a rear footwell region of the vehicle.

3. The rear-axle module as claimed in claim 2 , wherein the two front bearings arranged on the housing are elastomer bearings.

4. The rear-axle module as claimed in claim 3 , wherein a stiffness of the two front bearings in a z direction is at least three times a stiffness of the two front bearings in an x direction.

5. The rear-axle module as claimed in claim 4 , wherein a ratio of the stiffness of the two front bearings in the x direction, a stiffness of the two front bearings in a y direction and the stiffness of the two front bearings in the z direction is 2:5:7.

6. The rear-axle module as claimed in claim 1 , wherein the middle rear-axle member bearings are integrated into the housing.

7. The rear-axle module as claimed in claim 3 , wherein the middle rear-axle member bearings are integrated into the housing.

8. A vehicle including the rear-axle module of claim 1 .

9. The vehicle as claimed in claim 8 , further comprising:
an electric motor arranged on the rear-axle module to partially electrically drive the vehicle.

10. The rear-axle module as claimed in claim 3 , wherein
when the rear-axle module is in the installed position on the vehicle, a parting joint between the housing upper and lower shells is oriented obliquely downward along the housing from a top front of the housing to a bottom rear of the housing.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Stenzenberger Alfred
• Gleser Andreas
• Witta Lars
• Kuehlewind Steffen

Classifications

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• B60K2001/0438

  Arrangement under the floor · CPC title

• B60K1/04

  of the electric storage means for propulsion · CPC title

• B62D21/11 Primary

  with resilient means for suspension {, e.g. of wheels or engine; sub-frames for mounting engine or suspensions} · CPC title