Hybrid drive system

Patent metadata

Field	Value
Publication number	US-11926219-B2
Application number	US-202017440253-A
Country	US
Kind code	B2
Filing date	Mar 6, 2020
Priority date	Mar 20, 2019
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

A hybrid drive system for a motor vehicle includes a housing and an input shaft, which is provided to introduce torsional moments, which can be provided by an internal combustion engine, into the hybrid drive system, and which is rotatably mounted around a rotational axis. The system also includes an output shaft arranged coaxially in relation to the input shaft, an electric motor having a stator and a rotor, and a rotor support, which is non-rotationally connected to the rotor. The rotor support has a support hub, a support wall, and a support cylinder. The system also includes a separating clutch having a first inner disc carrier and a first outer disc carrier. A first bearing is arranged between the support hub and the housing. A second bearing is arranged between the support hub and the input shaft. The support wall and the support cylinder are a one-piece sheet metal part.

First claim

The invention claimed is:

1. A hybrid drive system for a motor vehicle, the hybrid drive system comprising:
a housing;
an input shaft, which is configured to introduce torsional moments provided by an internal combustion engine into the hybrid drive system, wherein the input shaft is rotatably mounted around a rotational axis;
an output shaft arranged coaxially in relation to the input shaft;
an electric motor having a stator and a rotor;
a rotor support, which is non-rotationally connected to the rotor, wherein the rotor support has a support hub, a support wall, and a support cylinder;
a separating clutch having a first inner disc carrier and a first outer disc carrier;
a first bearing arranged between the support hub and the housing, wherein the first bearing is arranged to rotatably mount the support hub in relation to the housing;
a second bearing arranged between the support hub and the input shaft, wherein the second bearing is arranged to rotatably mount the support hub in relation to the input shaft, wherein the support wall and the support cylinder are a one-piece sheet metal part, wherein the first inner disc carrier is non-rotationally connected to the input shaft, and the first outer disc carrier is non-rotationally connected to the rotor support;
a third bearing; and
a torsional moment converter having a pump wheel, a converter cover non-rotationally connected to the pump wheel, and a converter hub non-rotationally connected to the converter cover, wherein the third bearing is arranged between the input shaft and the converter hub and rotatably mounts the converter hub in relation to the input shaft.

2. The hybrid drive system of claim 1 , wherein the first bearing radially surrounds and axially overlaps with the second bearing.

3. The hybrid drive system of claim 1 , wherein the first bearing radially surrounds the support hub.

4. The hybrid drive system of claim 1 , wherein the support hub radially surrounds the second bearing.

5. The hybrid drive system of claim 1 , wherein a connection point of non-rotational connection of the first inner disc carrier to the input shaft is arranged axially between the second bearing and the third bearing.

6. The hybrid drive system of claim 1 , further comprising:
a first actuation piston of the separating clutch, which is mounted on the converter hub, wherein the first bearing, the support wall, the third bearing, and the actuation piston are arranged one after the other in sequence in an axial direction.

Assignees

• Daimler Ag
• Mercedes Benz Group Ag

Inventors

• Lechthaler Thomas
• Velthaus Jan
• Rube Lukas
• Ziegler Bernhard
• Koppitz Bernd
• Heukelbach Kai

Classifications

• B60K6/40 Primary

  characterised by the assembly or relative disposition of components · CPC title

• B60K6/387

  Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means · CPC title

• B60K6/405

  Housings · CPC title

• B60K6/48 Primary

  Parallel type · CPC title

• B60K2006/4825

  Electric machine connected or connectable to gearbox input shaft · CPC title