Dual clutch transmission

Patent metadata

Field	Value
Publication number	US-11480232-B2
Application number	US-202017038418-A
Country	US
Kind code	B2
Filing date	Sep 30, 2020
Priority date	Apr 7, 2020
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A dual clutch transmission may include a first input shaft, a second input shaft, a first output shaft and a second output shaft; a first gear constrained to the first input shaft; a second gear and a third gear constrained to the second input shaft; a fourth gear provided to constrain the rotation to the second input shaft; a fifth gear which is engaged with the third gear; a sixth gear which is gear-engaged with the fourth gear; a seventh gear which is engaged with the first gear; an eighth gear which is gear-engaged with the second gear; and a ninth gear which is gear-engaged with the fourth gear.

First claim

What is claimed is:

1. A transmission comprising:
a first input shaft and a second input shaft which are concentrically mounted to each other and engaged to a power source;
a first output shaft and a second output shaft which are mounted parallel with the first input shaft, wherein the first output shaft includes a first output gear and the second output shaft includes a second output gear and the first and second output gears are engaged with a ring gear of a differential;
a first gear, rotation of which is constrained to the first input shaft;
a second gear and a third gear, rotations of which are constrained to the second input shaft;
a fourth gear, a rotation of which is selectively constrained to the second input shaft;
a fifth gear gear-engaged with the third gear, wherein a rotation of the fifth gear is selectively constrained to the first output shaft;
a sixth gear gear-engaged with the fourth gear, wherein a rotation of the sixth gear is selectively constrained to the first output shaft;
a seventh gear gear-engaged with the first gear, wherein a rotation of the seventh gear is selectively constrained to the second output shaft;
an eighth gear which is gear-engaged with the second gear, rotatably mounted on the second output shaft, and selectively connectable to the seventh gear; and
a ninth gear which is gear-engaged with the fourth gear, rotatably mounted on the second output shaft, and selectively connectable to the seventh gear.

2. The transmission according to claim 1 ,
wherein the second input shaft is formed of a hollow shaft surrounding the first input shaft, and
wherein the fourth gear, the third gear, the second gear and the first gear are mounted sequentially along an axial direction of the first input shaft from the power source.

3. The transmission according to claim 1 , further including a hollow shaft concentrically mounted to the second output shaft,
wherein the first gear is fixedly connected to the first input shaft;
wherein the second gear and the third gear are fixedly connected to the second input shaft;
wherein the fourth gear is rotatably mounted on the second input shaft;
wherein the fifth gear is rotatably mounted on the first output shaft;
wherein the sixth gear is rotatably mounted on the first output shaft;
wherein the seventh gear is fixedly mounted on the hollow shaft,
wherein the eighth gear is rotatably mounted on the hollow shaft, and, and
wherein the ninth gear is rotatably mounted on the hollow shaft.

4. The transmission according to claim 3 , further including a first synchronizer, wherein the second input shaft is provided with the first synchronizer which selectively constrains the rotation of the fourth gear to the second input shaft.

5. The transmission according to claim 4 , further including a second synchronizer and a third synchronizer,
wherein the first output shaft is provided with the second synchronizer which selectively constrains the rotation of the fifth gear to the first output shaft, and the third synchronizer which selectively constrains the rotation of the sixth gear to the first output shaft, and
wherein the sixth gear is disposed between the second synchronizer and the third synchronizer.

6. The transmission according to claim 5 , further including a fourth synchronizer, a fifth synchronizer and a sixth synchronizer,
wherein the second output shaft is provided with the fourth synchronizer which selectively constrains the seventh gear to the second output shaft,
wherein the fifth synchronizer which selectively connects the eighth gear to the seventh gear is mounted on the hollow shaft between the eighth gear and the ninth gear, and
wherein the sixth synchronizer which selectively connects the ninth gear to the seventh gear is mounted on the hollow shaft between the fifth synchronizer and the ninth gear.

7. The transmission according to claim 6 ,
wherein the eighth gear and the ninth gear are rotatably mounted to the hollow shaft which connects between the seventh gear and the fourth synchronizer.

8. The transmission according to claim 7 , further including:
a third output shaft which is mounted parallel with the first input shaft, and has a third output gear gear-engaged with the ring gear of the differential,
wherein a tenth gear fixedly connected to the fifth gear, is rotatably mounted on the first output shaft between the fifth gear and the second synchronizer, and
wherein an eleventh gear is gear-engaged with the tenth gear and is rotatably mounted on the third output shaft, rotation of the eleventh gear being selectively constrained to the third output shaft.

9. The transmission according to claim 8 ,
wherein the third output shaft is provided with a parking gear and a seventh synchronizer which selectively constrains the rotation of the eleventh gear to the third output shaft.

10. The transmission according to claim 9 ,
wherein the third output shaft is provided with a third output gear gear-engaged with the ring gear of the differential.

11. The transmission according to claim 9 , wherein the transmission is formed of:
six gear columns which are first spaces in which predetermined gears, which are engaged with each other vertically to an axial direction of the first input shaft among the first output gear, the second output gear, the first gear, the second gear, the third gear, the fourth gear, the fifth gear, the sixth gear, the seventh gear, the eighth gear, the ninth gear, the tenth gear and the eleventh gear occupy along the axial direction, and
two sleeve columns which are second spaces in which predetermined synchronizers occupy along the axial direction among the first synchronizer, the second synchronizer, the third synchronizer, the fourth synchronizer, the fifth synchronizer and the sixth synchronizer, in addition to the first spaces in which the sixth gear columns occupy along the axial direction.

12. The transmission according to claim 11 ,
wherein the six gear columns includes:
a first gear column including the first output gear and the second output gear;
a second gear column including the fourth gear, the sixth gear and the ninth gear;
a third gear column including the eleventh gear and the tenth gear;
a fourth gear column including the fifth gear and the third gear;
a fifth gear column including the second gear and the eighth gear;, and
a sixth gear column including the first gear and the seventh gear, and

wherein the two sleeve columns includes:
a first sleeve column including the first synchronizer and the fourth synchronizer; and
a second sleeve column including the second synchronizer, the sixth synchronizer and the seventh synchronizer.

13. The transmission according to claim 12 , wherein the first gear column, the first sleeve column, the second gear column, the second sleeve column, the third gear column, the fourth gear column, the fifth gear column, and the sixth gear column are aligned in series from the power source.

14. The transmission according to claim 11 ,
wherein the transmission is configured to implement shifting stages having forward six stages and reverse one stage.

15. The transmission according to claim 1 ,
wherein the second output shaft is provided with a parking gear.

16. The transmission according to claim 1 , further including:
a first clutch configured for selectively connecting the power source to the first input shaft; and
a second clutch configured for selectively connecting the power source to the second input shaft.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Eo Soon Ki
• Kim Dong Woo
• Chae Min Ho
• Yoo Il Han
• Kim Chon Ok
• Meyer Marcus
• Leesch Mirko
• Schreiterer Erik
• Resch Rico
• Hoehne Matthias
• Mueller Joerg

Classifications

• F16H3/093 Primary

  with two or more countershafts · CPC title

• F16H2003/0938

  with multiple gears on the input shaft directly meshing with respective gears on the output shaft · CPC title

• F16H2200/0052

  the gear ratios comprising six forward speeds · CPC title

• F16H2003/0931

  each countershaft having an output gear meshing with a single common gear on the output shaft · CPC title

• F16H3/12 Primary

  with means for synchronisation not incorporated in the clutches · CPC title