Dual clutch transmission

Patent metadata

Field	Value
Publication number	US-9989134-B2
Application number	US-201515510550-A
Country	US
Kind code	B2
Filing date	Sep 9, 2015
Priority date	Sep 10, 2014
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A dual clutch transmission 1 includes a first clutch 2, a second clutch 3, a first input shaft 4, a second input shaft 5, a counter shaft 6, an output shaft 7, a first splitter gear changing portion 10, a second splitter gear changing portion 20, and an output portion 30. The first splitter gear changing portion 10 has a first input gear 11 a, a first counter gear 11 b, a second input gear 12 a, a second/counter gear 12 b, and a first coupling mechanism 13. The second splitter gear changing portion 20 has an input/output gear 21 a, a third counter gear 21 b, a second coupling mechanism 22, and a third coupling mechanism 23. The output portion 30 has a fourth counter gear 31 a, a forward output gear 31 b, and a fourth coupling mechanism 33.

First claim

The invention claimed is:

1. A dual clutch transmission comprising:
a first clutch;
a second clutch that is disposed concentrically with the first clutch;
a first input shaft that is connected to a power source via the first clutch;
a second input shaft that is a hoi low shaft through which the first input shaft is inserted rotatably, the second input shaft being connected to the power source via the second clutch;
a counter shaft that is disposed parallel to the first input shaft and the second input shaft;
an output shaft that is disposed parallel to the counter shaft and coaxial with the first input shaft and the second input shaft;
a first splitter gear changing portion comprising:
a first input gear through which the second input shaft is inserted rotatably;
a first counter gear that is fixed to the counter shaft and meshes with the first input gear;
a second input gear through which the first input shaft is inserted rotatably;
a second counter gear that is fixed to the counter shaft and meshes with the second input gear; and
a first coupling mechanism configured to couple the first input gear and the second input gear selectively to the second input shaft;

a second splitter gear changing portion comprising:
an input/output gear that is fixed to the first input shaft;
a third counter gear through which the counter shaft is inserted rotatably, the third counter gear meshing with the input/output gear;
a second coupling mechanism configured to couple the output shaft to the first input shaft; and
a third coupling mechanism configured to couple the third counter gear to the counter shaft; and

an output portion comprising:
a fourth counter gear that is fixed to the counter shaft;
an output gear through which the output shaft is inserted rotatably, the output gear meshing with the fourth counter gear; and
a fourth coupling mechanism configured to couple the output gear to the output shaft.

2. The dual clutch transmission according to claim 1 , wherein the dual clutch transmission comprises:
a range mechanism comprising:
a case into which the output shaft is inserted rotatably;
a sun gear that is fixed to the output shaft inside the ease;
a planetary gear that meshes with the sun gear and configured to revolve around the sun gear;
a planetary carrier to which a rotational shaft of the planetary gear is fixed;
a range output shaft that is fixed to the planetary carrier so as to be disposed coaxial with the output shaft;
an outer gear that meshes with the planetary gear;
a fifth coupling mechanism configured to couple the outer gear to the case; and
a sixth coupling mechanism configured to couple the planetary carrier or the range output shaft to the output shaft.

Assignees

• Isuzu Motors Ltd

Inventors

• Ozaki Sho

Classifications

• F16H3/006 Primary

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

• F16H3/091

  including a single countershaft · CPC title

• F16H3/48

  with single orbital gears or pairs of rigidly-connected orbital gears · CPC title

• F16H37/065 Primary

  with a plurality of driving or driven shafts (F16H37/0806 takes precedence) · CPC title

• F16H2200/0069

  the gear ratios comprising ten forward speeds · CPC title