Electrical drive unit for a vehicle

Patent metadata

Field	Value
Publication number	US-10773600-B2
Application number	US-201615293313-A
Country	US
Kind code	B2
Filing date	Oct 14, 2016
Priority date	Apr 28, 2014
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

An electrical drive unit for a vehicle includes a number of structurally independently designed electrical machines. In each of the electrical machines there is a machine output shaft configured to provide a machine torque, and in each of the electrical machines there is inserted in a receiving region assigned to it and is connected to the receiving unit. The number of the inserted electrical machines is predetermined as a function of a specified value, which is prespecified in advance for an output-side characteristic quantity of the drive unit to be constructed. The number of the inserted electrical machines is between 1 and a maximum number. The electrical drive unit also includes a common main shaft, via which the drive unit is configured to provide a drive unit torque on the output side, and a coupling element, via which the machine output shafts are operationally connected on the driving side to the main shaft to input the machine torques.

First claim

What is claimed is:

1. An electrical drive unit for a vehicle, with a receiving unit, the receiving unit having a maximum number of receiving regions, of which each is designed in order to receive an electrical machine, the electrical drive unit comprising:
a number of structurally independently designed electrical machines, wherein
each of the electrical machines comprises a machine output shaft configured to provide a machine torque, and wherein each of the electrical machines is inserted in a receiving region assigned to it and is connected to the receiving unit, the receiving unit defining a first housing within which each of the electrical machines is housed,
a common main shaft, via which the drive unit is configured to provide a drive unit torque on the output side, the common main shaft being housed within a second housing that is different from the first housing,
a coupling element, via which the machine output shafts are operationally connected on the driving side to the main shaft to input the machine torques, and
the inserted electrical machines are structurally independent and each comprise an individually assigned activation device, so that the drive unit is scalable, wherein
the number of introduced electrical machines is predetermined based on a default value, the default value corresponding to an output-side characteristic quantity of the drive unit, and
the number of electrical machines introduced is between 1 and the maximum number.

2. The electrical drive unit as claimed in claim 1 , wherein the receiving unit is designed in such a manner that the inserted electrical machines are arranged in such a manner that the machine output shafts are oriented parallel to one another.

3. The electrical drive unit as claimed in claim 2 , wherein the receiving unit is designed in such a manner that the inserted electrical machines are arranged in such a manner that the machine output shafts are arranged symmetrically with respect to the main shaft.

4. The electrical drive unit as claimed in claim 3 , wherein the receiving unit is designed in such a manner that the inserted electrical machines are arranged in such a manner that the machine output shafts are oriented parallel to the main shaft.

5. The electrical drive unit as claimed in claim 4 , wherein the coupling element is a gear wheel which is operationally connected to the main shaft.

6. The electrical drive unit as claimed in claim 5 , wherein the coupling element is operationally connected to the main shaft via a freewheeling device.

7. The electrical drive unit as claimed in claim 6 , wherein the machine output shafts comprise at least one gear wheel region, via which the at least one gear wheel region is operationally connected to the coupling element designed as gear wheel.

8. The electrical drive unit as claimed in claim 7 , wherein the main shaft is part of a transmission of multi-stage design.

9. The electrical drive unit as claimed in claim 8 , wherein for forming a first stage of the transmission, the at least one gear wheel region of the machine output shafts and the coupling element designed as gear wheel interact.

10. The electrical drive unit as claimed in claim 9 , wherein for forming a further stage of the transmission, the machine output shafts each comprise a further gear wheel region, wherein the further gear wheel regions interact with a further gear wheel that is operationally connected to the main shaft.

11. The electrical drive unit as claimed in claim 8 , wherein for forming a further stage of the transmission, the machine output shafts each comprise a further gear wheel region, wherein the further gear wheel regions interact with a further gear wheel that is operationally connected to the main shaft.

12. The electrical drive unit as claimed in claim 11 , wherein the further gear wheel is operationally connected to the main shaft via a clutch device.

13. The electrical drive unit as claimed in claim 12 , wherein the clutch device is designed to make a frictional connection between the further gear wheel and the main shaft.

14. The electrical drive unit as claimed in claim 13 , wherein the receiving unit comprises cooling fins.

15. The electrical drive unit as claimed in claim 1 , wherein the vehicle is a single-track vehicle.

Assignees

• Bayerische Motoren Werke Ag
• Bayerische Motoren Werker Ag

Inventors

• Roesner Mathias
• Bock Thomas
• Gaubatz Karl-Heinz
• Schmidt Ralf

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• H02K9/227

  Heat sinks · CPC title

• B60K1/02 Primary

  comprising more than one electric motor · CPC title

• H02K7/116

  with gears · CPC title

• B60L2200/12

  Bikes · CPC title