Device for Transmitting a Torque in a Range Extender

Patent metadata

Field	Value
Publication number	US-2016252136-A1
Application number	US-201615151744-A
Country	US
Kind code	A1
Filing date	May 11, 2016
Priority date	Feb 14, 2014
Publication date	Sep 1, 2016
Grant date	—

Abstract

A device for transmitting a torque between an internal combustion engine and a generator has a motor-side shaft, a generator-side shaft, a separate transmission element for transmitting the torque between the two shafts, and a seal device. The motor-side shaft and the generator-side shaft are situated in each case substantially coaxially with respect to one another and are in each case connected by way of a shaft-hub connection to the transmission element, wherein a lubricant chamber which is situated radially outside the transmission element and between the motor-side shaft and the generator-side shaft and which couples the two shaft-hub connections with regard to a flow of lubricant is sealed off with respect to the outside by the seal device.

First claim

What is claimed is:

1 . A device for transmitting a torque between an internal combustion engine and a generator, the device comprising:
a motor-side shaft; a generator-side shaft; a separate transmission element that transmits torque between the motor-side shaft and the generator-side shaft, wherein the motor-side shaft and the generator-side shaft are arranged substantially coaxially with respect to one another and are connected in each case via a shaft/hub connection to the separate transmission element; a lubricant chamber is formed radially outside the transmission element between the motor-side shaft and the generator-side shaft, the lubricant chat b coupling the two shaft/hub connections in terms of lubricant flow; and a seal device configured to externally seal-off the lubricant chamber.

2 . The device according to claim 1 , further comprising:
at least one lubricant intake provided in one of the motor-side shaft and the generator-side shaft.

3 . The device according to claim 2 , wherein at least one lubricant intake is provided in the motor-side shaft.

4 . The device according to claim 1 , wherein the lubricant chamber is fluidically connected to a lubricant circuit of the internal combustion engine.

5 . The device according to claim 1 , wherein:
the seal device has a seal element, at one axial end of the seal element, the seal element overlaps with a tubular seal extension on one of the motor-side shaft and the generator-sides shaft, and the one axial end of the seal element bears against the tubular seal extension.

6 . The device according to claim 5 , wherein:
the axial end of the seal element has a conical seat surface that overlaps with the seal extension, and the seal extension has a complementary conical counter-surface that contacts the conical seal surface.

7 . The device according to claim 1 , wherein:
at least one of the motor-side shaft and the generator-side shaft has an axially projecting tubular shell part that extends around the transmission element and delimits the lubricant chamber radially outwardly at least in portions.

8 . The device according to claim 5 , wherein:
at least one of the motor-side shaft and the generator-side shaft has an axially projecting tubular shell part that extends around the transmission element and delimits the lubricant chamber radially outwardly at least in portions.

9 . The device according to claim 7 , wherein:
the tubular shell part is configured integrally with the generator-side shaft, and the seal element bears against and is guided on a radially inner surface of the tubular shell part.

10 . The device according to claim 8 , wherein the tubular shell part and the tubular seal extension overlap one another.

11 . The device according to claim 1 , wherein the seal device comprises a seal element axially tensioned between the motor-side shaft and the generator-side shaft.

12 . The device according to claim 1 , wherein the seal device comprises a spring supported on one of the motor-side shaft and the generator-side shaft, the spring pressing a seal element against the other one of the motor-side shaft and the generator-side shaft.

13 . The device according to claim 5 , wherein:
the seal device has a spring supported on e of the motor-side shaft and the generator-side shaft that does not have a tubular seal extension, and the spring is configured to press the seal element with a force against the tubular seal extension on the other one of the motor-side shaft and the generator-side shaft.

14 . The device according to claim 5 , wherein the seal element is configured as a sleeve or an O-ring.

15 . The device according to claim 1 , wherein:
at least one of the motor-side shaft or the generator-side shaft is configured as a hollow shaft having a torque transmission profile, the at least one of the two shafts being connected in a positive-locking manner to a complementary profile on the transmission element.

16 . The device according to claim 15 , wherein the torque transmission profile is a toothed profile.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Hohenner Hans
• Rudert Stefan
• Stopper Daniel
• Beuck Ingo

Classifications

• F16D1/02 Primary

  for connecting two abutting shafts or the like · CPC title

• Y10S277/912

  Spline connection · CPC title

• F16D2300/08

  Details or arrangements of sealings not provided for in group F16D3/84 · CPC title

• F16D2300/06

  Lubrication details not provided for in group F16D13/74 · CPC title

• F16D1/00 Primary

  Couplings for rigidly connecting two coaxial shafts or other movable machine elements (attachment of wheels to axles for railway carriages B60B; for attachment of cranks to their shafts F16C3/10) · CPC title