Power transmission apparatus for vehicle

Patent metadata

Field	Value
Publication number	US-9605731-B2
Application number	US-201414559813-A
Country	US
Kind code	B2
Filing date	Dec 3, 2014
Priority date	Sep 24, 2014
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A power transmission apparatus may include a first input shaft having at least one input gear and selectively connected to a power source through a first clutch, a second input shaft having at least one input gear and selectively connected to the power source through a second clutch, a first speed output unit including a first output shaft and at least one speed gear engaged with the at least one input gear on the first and second input shafts, a second speed output unit including a second output shaft and at least one speed gear engaged with the at least one input gear on the first and second input shafts and rotatably disposed on the second output shaft, and an idle module including at least two idle gears on an idle shaft.

First claim

What is claimed is:

1. A power transmission apparatus for a vehicle comprising:
a first input shaft having at least one input gear fixedly disposed on an exterior circumference thereof and is selectively connected to a power source through a first clutch;
a second input shaft having at least one input gear fixedly disposed on an exterior circumference thereof and is selectively connected to the power source through a second clutch;
a first speed output unit including a first output shaft disposed in parallel with the first and second input shafts and at least one speed gear engaged with the at least one input gear on the first and second input shafts and rotatably disposed on the first output shaft, and changing and outputting torque transmitted from the first input shaft or the second input shaft by connecting the at least one speed gear to the first output shaft;
a second speed output unit including a second output shaft disposed in parallel with the first and second input shafts and at least one speed gear engaged with the at least one input gear on the first and second input shafts and rotatably disposed on the second output shaft, and changing and outputting torque transmitted from the first input shaft or second input shaft by connecting the at least one speed gear to the second output shaft; and
an idle module including at least two idle gears on an idle shaft disposed in parallel with the first and second input shafts, wherein one of the idle gears is engaged with one input gear on the first input shaft, another of the idle gears is engaged with one input gear on the second input shaft, and one of the idle gears engaged with the input gears is selectively connected to the idle shaft
wherein first, second, and third input gears are fixedly disposed on the first input shaft, and fourth and fifth input gears are fixedly disposed on the second input shaft,
wherein the first speed output unit includes:
the first output shaft disposed in parallel with and apart from the first and second input shafts;
a second speed gear rotatably disposed on the first output shaft and engaged with the second input gear;
a sixth speed gear rotatably disposed on the first output shaft and engaged with the third input gear;
a first synchronizer selectively connecting the second speed gear or the sixth speed gear to the first output shaft;
a third speed gear rotatably disposed on the first output shaft and engaged with the fourth input gear;
a seventh speed gear rotatably disposed on the first output shaft and engaged with the fifth input gear;
a second synchronizer selectively connecting the third speed gear or the seventh speed gear to the first output shaft; and
a first output gear fixedly disposed on the first output shaft,

wherein the second speed output unit comprises:
the second output shaft disposed in parallel with and apart from the first and second input shafts;
a fourth speed gear rotatably disposed on the second output shaft and engaged with the first input gear;
a third synchronizer selectively connecting the fourth speed gear to the second output shaft;
a fifth speed gear rotatably disposed on the second output shaft and engaged with the fifth input gear;
a reverse speed gear rotatably disposed on the second output shaft
a fourth synchronizer selectively connecting the fifth speed gear or the reverse speed gear to the second output shaft; and
a second output gear fixedly disposed on the second output shaft,

wherein the idle module comprises:
the idle shaft disposed in parallel with and apart from the first and second input Shafts;
a first idle gear fixedly disposed on a first end portion of the idle shaft and engaged with one input gear on the first input shaft;
a second idle gear including an idle input gear and an idle output gear integrally formed with each other and rotatably disposed on a second end portion of the idle shaft, wherein the idle input gear is engaged with one input gear on the second input shaft and the idle output gear is engaged with the reverse speed gear disposed on one of the first and second output shafts; and
a fifth synchronizer selectively connecting the second idle gear to the idle shaft,

wherein the first idle gear is engaged with the first input gear on the first input shaft,
the idle input gear of the second idle gear is engaged with the fourth input gear on the second input shaft, and
the idle output gear of the second idle gear is engaged with the reverse speed gear on the second output shaft, and

wherein the fifth synchronizer selectively connects the idle output gear of the second idle gear to the idle shaft.

2. A power transmission apparatus for a vehicle comprising:
a first input shaft having at least one input gear fixedly disposed on an exterior circumference thereof and is selectively connected to a power source through a first clutch;
a second input shaft having at least one input gear fixedly disposed on an exterior circumference thereof and is selectively connected to the power source through a second clutch;
a first speed output unit including a first output shaft disposed in parallel with the first and second input shafts and at least one speed gear engaged with the at least one input gear on the first and second input shafts and rotatably disposed on the first output shaft, and changing and outputting torque transmitted from the first input shaft or the second input shaft by connecting the at least one speed gear to the first output shaft;
a second speed output unit including a second output shaft disposed in parallel with the first and second input shafts and at least one speed gear engaged with the at least one input gear on the first and second input shafts and rotatably disposed on the second output shaft, and changing and outputting torque transmitted from the first input shaft or second input shaft by connecting the at least one speed gear to the second output shaft; and
an idle module including at least two idle gears on an idle shaft disposed in parallel with the first and second input shafts, wherein one of the idle gears is engaged with one input gear on the first input shaft, another of the idle gears is engaged with one input gear on the second input shaft, and one of the idle gears engaged with the input gears is selectively connected to the idle shaft,
wherein first, second, and third input gears are fixedly disposed on the first input shaft, and fourth and fifth input gears are fixedly disposed on the second input shaft,
wherein the first speed output unit comprises:
the first output shaft disposed in parallel with and apart from the first and second input shafts;
a third speed gear rotatably disposed on the first output shaft and engaged with the second input gear;
a fifth speed gear rotatably disposed on the first output shaft and engaged with the third input gear;
a first synchronizer selectively connecting the third speed gear or the fifth speed gear to the first output shaft;
a second speed gear rotatably disposed on the first output shaft and engaged with the fourth input gear;
a fourth speed gear rotatably disposed on the first output shaft and engaged with the fifth input gear;
a second synchronizer selectively connecting the second speed gear or the fourth speed gear to the first output shaft; and
a first output gear fixedly disposed on the first output shaft,

wherein the second speed output unit comprises:
the second output shaft disposed in parallel with and apart from the first and second input shafts;
a seventh speed gear rotatably disposed on the second output shaft and engaged with the first input gear;
a third synchronizer selectively connecting the seventh speed gear to the second output shaft;
a sixth speed gear rotatably disposed on the second output shaft and engaged with the fifth input gear;
a reverse speed gear rotatably dispos

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lee Suengho
• Park Jongsool
• Hwang Seongwook
• Lee Byunghyun
• Lee Kyeonghun
• Song Minjun
• Kim Jongmin

Classifications

• F16H3/091 Primary

  including a single countershaft · CPC title

• F16H3/08

  exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts · CPC title

• F16H2200/0056

  the gear ratios comprising seven forward speeds · CPC title

• F16H2003/0931

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

• F16H3/085

  with more than one output shaft · CPC title