Transmission assembly and drive unit

Patent metadata

Field	Value
Publication number	US-11827103-B2
Application number	US-202117798328-A
Country	US
Kind code	B2
Filing date	Feb 3, 2021
Priority date	Feb 24, 2020
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

A transmission assembly may include a first transmission input shaft and a second transmission input shaft. The first transmission input shaft and the second transmission input shaft are torque-transmittingly coupled to a first planetary transmission. A transmission output shaft of the transmission assembly is also torque-transmittingly coupled to a second planetary transmission. In the power flow, a first spur gear is arranged between the first planetary transmission and the second planetary transmission. In addition, a drive unit for driving a first vehicle axle is proposed, which has a transmission assembly of this type.

First claim

The invention claimed is:

1. A transmission assembly for a hybrid vehicle, the transmission assembly comprising:
a first transmission input shaft of the transmission assembly, said first transmission input shaft being couplable to an internal combustion engine;
a second transmission input shaft of the transmission assembly, said second transmission input shaft being couplable to a first electric drive machine;
a first planetary transmission;
a second planetary transmission;
a first spur gear transmission; and
a transmission output shaft of the transmission assembly, wherein
the first transmission input shaft and the second transmission input shaft are coupled to the first planetary transmission in a torque-transmitting manner, wherein
the transmission output shaft is coupled to the second planetary transmission in a torque-transmitting manner, wherein
the first spur gear transmission is arranged mechanically between the first planetary transmission and the second planetary transmission, wherein
a third transmission input shaft is provided which is couplable to a second electric drive machine, and wherein
the third transmission input shaft is coupled to the second planetary transmission in a torque-transmitting manner via a wraparound transmission in order to introduce torque into the second planetary transmission, and wherein
the third transmission input shaft is additionally coupled to the second planetary transmission in a torque-transmitting manner via a second spur gear transmission.

2. The transmission assembly according to claim 1 , wherein
the first transmission input shaft is coupled to a ring gear or to a planet carrier of the first planetary transmission in a torque-transmitting manner, and wherein
the first transmission input shaft is connected to the ring gear or to the planet carrier of the first planetary transmission in a rotationally fixed manner.

3. The transmission assembly according to claim 1 , wherein
the second transmission input shaft is coupled to a sun gear of the first planetary transmission in a torque-transmitting manner, and wherein
the second transmission input shaft is connected to the sun gear of the first planetary transmission in a rotationally fixed manner.

4. The transmission assembly according to claim 1 , wherein the second transmission input shaft is selectively couplable to a ring gear of the first planetary transmission in a rotationally fixed manner with a first shift element, and/or
in that the second transmission input shaft is selectively couplable to a transmission housing in a rotationally fixed manner with a second shift element.

5. The transmission assembly according to claim 1 , wherein the first planetary transmission is connected to the first spur gear transmission in a torque-transmitting manner via a wraparound transmission for introducing torque into the first spur gear transmission.

6. The transmission assembly according to claim 5 , wherein a planet carrier and/or a ring gear of the first planetary transmission is coupled to an input shaft of the first spur gear transmission in a torque-transmitting manner via the wraparound transmission.

7. The transmission assembly according to claim 1 , wherein the first spur gear transmission has at least two shiftable spur gear stages.

8. The transmission assembly according to claim 1 , wherein
an output shaft of the first spur gear transmission is coupled to a sun gear of the second planetary transmission in a torque-transmitting manner, and wherein
the output shaft of the first spur gear transmission is coupled to the sun gear of the second planetary transmission in a rotationally fixed manner.

9. The transmission assembly according to claim 1 , wherein an input shaft of the first spur gear transmission and an output shaft of the first spur gear transmission are substantially parallel.

10. The transmission assembly according to claim 1 , wherein
an input shaft of the first spur gear transmission and an output shaft of the first spur gear transmission are arranged in a substantially concentric manner, and wherein
the first spur gear transmission comprises a countershaft via which the input shaft and the output shaft are selectively couplable in a torque-transmitting manner.

11. A drive unit for driving a first vehicle axle, the drive unit comprising:
a transmission assembly according to claim 1 ;
an internal combustion engine which is coupled to the first transmission input shaft in a torque-transmitting manner; and
a first electric drive machine which is coupled to the second transmission input shaft in a torque-transmitting manner.

12. The drive unit according to claim 11 , wherein
the transmission output shaft is arranged coaxially with respect to the first vehicle axle or at least in a region of the first vehicle axle and parallel to the first vehicle axle, and wherein
an output shaft of the first spur gear transmission is also arranged coaxially with respect to the first vehicle axle or at least in the region of the first vehicle axle and parallel to the first vehicle axle.

13. The drive unit according to claim 11 , wherein
a second electric drive machine for driving the first vehicle axle is coupled to a third transmission input shaft in a torque-transmitting manner, or
the second electric drive machine is coupled to a second vehicle axle for driving the second vehicle axle.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Ohnemus Ulrich

Classifications

• B60K6/547 Primary

  the transmission being a stepped gearing · CPC title

• B60K6/365

  with the gears having orbital motion · CPC title

• B60K6/445 Primary

  Differential gearing distribution type · CPC title

• B60K6/52

  Driving a plurality of drive axles, e.g. four-wheel drive · CPC title

• B60K6/40

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