Multi-speed transmission for a vehicle, a vehicle, and a method for operating a multi-speed transmission

Patent metadata

Field	Value
Publication number	US-12203535-B2
Application number	US-202418666722-A
Country	US
Kind code	B2
Filing date	May 16, 2024
Priority date	Dec 15, 2021
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

A multi-speed transmission for a vehicle has an extension in an axial direction and includes first and second input shafts, first and second output shafts, and first and second intermediate shafts. The transmission includes an annulus internally toothed first ring gear drivingly connected to the second input shaft and an annulus internally toothed second ring gear releasably connected to the first ring gear. The first intermediate shaft includes first and second gear wheels respectively in engagement with the first ring gear and the second ring gear. The second intermediate shaft includes a third gear wheel in engagement with the first ring gear and a fourth gear wheel in engagement with the second ring gear. The first output shaft includes a fifth gear wheel in engagement with second gear wheel, and the second output shaft includes a sixth gear wheel in engagement with the fourth gear wheel.

First claim

What is claimed is:

1. A multi-speed transmission for a vehicle, wherein the transmission has an extension in an axial direction and comprises a first input shaft, a second input shaft, a first output shaft, a second output shaft, a first intermediate shaft and a second intermediate shaft,
wherein the transmission further comprises an annulus internally toothed first ring gear drivingly connected to the second input shaft and an annulus internally toothed second ring gear releasably connected to the first ring gear,
wherein the first intermediate shaft comprises a first gear wheel in engagement with the first ring gear and a second gear wheel in engagement with the second ring gear, wherein the second intermediate shaft comprises a third gear wheel in engagement with the first ring gear and a fourth gear wheel in engagement with the second ring gear,
wherein the first output shaft comprises a fifth gear wheel in engagement with second gear wheel, and the second output shaft comprises a sixth gear wheel in engagement with the fourth gear wheel,
wherein the first ring gear, the first gear wheel, and the third gear wheel are arranged in a first axial plane; wherein the second ring gear, the second gear wheel, and the fifth gear wheel are arranged in a second axial plane; and wherein the second ring gear, the fourth gear wheel, and the sixth gear wheel are arranged in a third axial plane.

2. The multi-speed transmission according to claim 1 , wherein the first ring gear and the second ring gear are concentrically arranged in relation to each other and separated in the axial direction, wherein the first ring gear and the second ring gear are releasably connected to each other via a first clutch;
wherein the first intermediate shaft comprises a second clutch arranged between the first gear wheel and the second gear wheel, wherein the first gear wheel and the second gear wheel are releasably connected to each other via the second clutch; and
wherein the second intermediate shaft comprises a third clutch arranged between the third gear wheel and the fourth gear wheel, wherein the third gear wheel and the fourth gear wheel are releasably connected to each other via the third clutch.

3. The multi-speed transmission according to claim 1 , wherein the first input shaft and the first output shaft are connected to each other and formed as a common shaft structure extending in the axial direction.

4. The multi-speed transmission according to claim 1 , wherein the first axial plane, the second axial plane, and the third axial plane, are arranged in a parallel relationship to each other and separated in the axial direction of the transmission.

5. The multi-speed transmission according to claim 1 , wherein the first input shaft, the second input shaft, the first output shaft, the second output shaft, the first intermediate shaft and the second intermediate shaft, are arranged in a parallel relationship to each other in the axial direction of the transmission.

6. The multi-speed transmission according to claim 1 , wherein the first input shaft and the second input shaft are concentrically arranged in relation to each other, wherein the first input shaft is arranged as an inner shaft and the second input shaft as an outer shaft concentrically outside the first input shaft; and wherein the first output shaft and the second output shaft are concentrically arranged in relation to each other, wherein the first output shaft is arranged as an inner shaft and the second output shaft as an outer shaft concentrically outside the first output shaft.

7. The multi-speed transmission according to claim 1 , wherein the first gear wheel and the third gear wheel are arranged on radially opposite sides of the first input gear shaft and the first output gear shaft; wherein the second gear wheel and the fourth gear wheel are arranged on radially opposite sides of the first input gear shaft and the first output gear shaft.

8. The multi-speed transmission according to claim 1 , wherein the second output shaft further comprises a seventh gear wheel in engagement with the fourth gear wheel via an idler gear, and wherein the second output shaft comprises a fourth clutch arranged for selectively connecting one of the sixth gear wheel and the seventh gear wheel to the second output shaft and disconnecting the other of the sixth gear wheel and the seventh gear wheel from the second output shaft.

9. A vehicle comprising the multi-speed transmission according to claim 1 .

10. A method for operating a multi-speed transmission for a vehicle, wherein the transmission has an extension in an axial direction and comprises a first input shaft, a second input shaft, a first output shaft, a second output shaft, a first intermediate shaft and a second intermediate shaft,
wherein the transmission further comprises an annulus internally toothed first ring gear drivingly connected to the second input shaft and an annulus internally toothed second ring gear releasably connected to the first ring gear,
wherein the first intermediate shaft comprises a first gear wheel in engagement with the first ring gear and a second gear wheel in engagement with the second ring gear, wherein the second intermediate shaft comprises a third gear wheel in engagement with the first ring gear and a fourth gear wheel in engagement with the second ring gear,
wherein the first output shaft comprises a fifth gear wheel in engagement with the second gear wheel, and the second output shaft comprises a sixth gear wheel in engagement with the fourth gear wheel,
wherein the first ring gear, the first gear wheel, and the third gear wheel are arranged in a first axial plane; wherein the second ring gear, the second gear wheel, and the fifth gear wheel are arranged in a second axial plane; and wherein the second ring gear, the fourth gear wheel, and the sixth gear wheel are arranged in a third axial plane;
wherein the first ring gear and the second ring gear are releasably connected to each other via a first clutch, wherein the first gear wheel and the second gear wheel are releasably connected to each other via a second clutch arranged on the first intermediate shaft, and wherein the third gear wheel and the fourth gear wheel are releasably connected to each other via a third clutch arranged on the second intermediate shaft; wherein the method comprises the steps:
operating the first clutch, the second clutch, and the third clutch between connected and disconnected modes for providing different gear ratios of the multi-speed transmission.

11. The method according to claim 10 , wherein the method further comprises the steps: receiving a command for operating the transmission with a first gear ratio; transferring torque from the first input shaft directly to the first output shaft for providing the first gear ratio.

12. The method according to claim 10 , wherein the method further comprises the steps: receiving a command for operating the transmission with a second gear ratio or a seventh gear ratio; connecting the first clutch, disconnecting the second clutch, and disconnecting the third clutch; and
transferring torque from the second input shaft to the first output shaft via the first ring gear, the second ring gear, the second gear wheel, and the fifth gear wheel, for providing the second gear ratio, or transferring torque from the second input shaft to the second output shaft via the first ring gear, the second ring gear, the fourth gear wheel, and the sixth gear wheel, for providing the seventh gear ratio.

13. The method according to claim 10 , wherein the method further comprises the steps: receiving a command for operating the transmission with a

Assignees

• Ningbo Geely Automobile Res & Development Co Ltd
• Geely Holding Group Co Ltd
• Ningbo Geely Automobile Res & Dev Co Ltd

Inventors

• Sily Omar

Classifications

• F16H2200/2007

  with two sets of orbital gears · CPC title

• F16H2200/0052

  the gear ratios comprising six forward speeds · CPC title

• F16H3/085

  with more than one output shaft · CPC title

• F16H3/006

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title

• F16H2200/0073

  the gear ratios comprising eleven forward speeds · CPC title