Planetary gear train of automatic transmission for vehicles

Patent metadata

Field	Value
Publication number	US-9382976-B2
Application number	US-201313957212-A
Country	US
Kind code	B2
Filing date	Aug 1, 2013
Priority date	Nov 5, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving a torque of an engine, an output shaft disposed substantially in parallel with the input shaft at a predetermined distance and outputting a changed torque, a first planetary gear set disposed on the input shaft and including a first, second and third rotation elements, a second planetary gear set disposed on the output shaft and including a fourth, fifth and sixth rotation elements, four transfer gears forming the externally-meshed gears, and frictional elements including clutches connecting the input shaft and the rotation elements of the first and second planetary gear sets and brakes connecting the rotation elements of the first and second planetary gear sets and a transmission housing.

First claim

What is claimed is:

1. A planetary gear train of an automatic transmission for a vehicle, comprising:
an input shaft receiving a torque of an engine;
an output shaft disposed in parallel with the input shaft at a predetermined distance and outputting a changed torque;
a first planetary gear set disposed on the input shaft, and including a first rotation element selectively connectable to the input shaft, a second rotation element selectively connectable to the input shaft and selectively connectable to a transmission housing, and a third rotation element;
a second planetary gear set disposed on the output shaft, and including a fourth rotation element selectively connectable to the input shaft, connected to the first rotation element, and selectively connectable to the transmission housing, a fifth rotation element connected to the third rotation element and directly connected to the output shaft, and a sixth rotation element selectively connectable to the input shaft;
a first transfer gear directly connecting the first rotation element with the fourth rotation element;
a second transfer gear directly connecting the third rotation element with the fifth rotation element;
a third transfer gear connected to the input shaft and selectively connectable to the sixth rotation element; and
four transfer gears selectively connectable to the input shaft and continuously connected to the sixth rotation element.

2. The planetary gear train of claim 1 , wherein the first planetary gear set is a single pinion planetary gear set including a first sun gear being the first rotation element, a first planet carrier being the second rotation element, and a first ring gear being the third rotation element, and
the second planetary gear set is a single pinion planetary gear set including a second sun gear being the fourth rotation element, a second planet carrier being the fifth rotation element, and a second ring gear being the sixth rotation element.

3. The planetary gear train of claim 2 , wherein
the first transfer gear is disposed between the first rotation element and the fourth rotation element;
the second transfer gear is disposed between the third rotation element and the fifth rotation element;
the third transfer gear is disposed between the input shaft and the sixth rotation element; and
the fourth transfer gear is disposed between the input shaft and the sixth rotation element.

4. The planetary gear train of claim 3 , wherein a gear ratio of the fourth transfer gear differs from that of the third transfer gear.

5. The planetary gear train of claim 3 , wherein
a first clutch is disposed between the third transfer gear and the sixth rotation element;
a second clutch is disposed between the input shaft and the first rotation element;
a third clutch is disposed between the input shaft and the second rotation element;
a fourth clutch is disposed between the input shaft and the fourth transfer gear;
a first brake is disposed between the second rotation element and the transmission housing; and
a second brake is disposed between the fourth rotation element and the transmission housing.

6. The planetary gear train of claim 5 , wherein the first clutch and the first brake are operated at a first forward speed,
the first clutch and the second brake are operated at a second forward speed,
the first clutch and the second clutch are operated at a third forward speed,
the first clutch and the third clutch are operated at a fourth forward speed,
the second clutch and the third clutch are operated at a fifth forward speed,
the third clutch and the second brake are operated at a sixth forward speed,
the third clutch and the fourth clutch are operated at a seventh forward speed,
the fourth clutch and the second brake are operated at an eighth forward speed,
the second clutch and the fourth clutch are operated at a ninth forward speed, and
the second clutch and the first brake are operated at a reverse speed.

7. The planetary gear train of claim 3 , wherein the frictional elements comprise:
a first clutch disposed between the third transfer gear and the sixth rotation element;
a second clutch disposed between the input shaft and the first rotation element;
a third clutch disposed between the input shaft and the second rotation element;
a fourth clutch disposed between the input shaft and the fourth transfer gear;
a first brake disposed between the second rotation element and the transmission housing; and
a second brake disposed between the first rotation element and the transmission housing.

8. A planetary gear train of an automatic transmission for a vehicle, comprising:
an input shaft receiving a torque of an engine;
an output shaft disposed in parallel with the input shaft at a predetermined distance and outputting changed torque;
a first planetary gear set disposed on the input shaft, and including a first rotation element selectively connectable to the input shaft, a second rotation element selectively connectable to the input shaft and selectively connectable to a transmission housing, and a third rotation element;
a second planetary gear set disposed on the output shaft, and including a fourth rotation element selectively connectable to the input shaft, connected to the first rotation element, and selectively connectable to the transmission housing, a fifth rotation element connected to the third rotation element and directly connected to the output shaft, and a sixth rotation element selectively connectable to the input shaft;
a first clutch selectively connecting the input shaft with the sixth rotation element;
a second clutch selectively connecting the input shaft with the first rotation element;
a third clutch selectively connecting the input shaft with the second rotation element;
a fourth clutch selectively connecting the input shaft with the sixth rotation element;
a first brake selectively connecting the second rotation element with the transmission housing;
a second brake selectively connecting the fourth rotation element with the transmission housing;
a first transfer gear directly connected to the first rotation element and the fourth rotation element;
a second transfer gear directly connected to the third rotation element and the fifth rotation element;
a third transfer gear connected to the input shaft and the first clutch;
a fourth transfer gear connected to the fourth clutch and continuously connected to the sixth rotation element.

9. The planetary gear train of claim 8 , wherein a gear ratio of the fourth transfer gear differs from that of the third transfer gear.

10. The planetary gear train of claim 8 , wherein the first planetary gear set is a single pinion planetary gear set including a first sun gear being the first rotation element, a first planet carrier being the second rotation element, and a first ring gear being the third rotation element, and
the second planetary gear set is a single pinion planetary gear set including a second sun gear being the fourth rotation element, a second planet carrier being the fifth rotation element, and a second ring gear being the sixth rotation element.

11. The planetary gear train of claim 8 , wherein
the first clutch is disposed between the third transfer gear and the sixth rotation element;
the second clutch is disposed between the input shaft and the first rotation element;
the third clutch is disposed between the input shaft and the second rotation element;
the fourth clutch is disposed between the input shaft and the fourth transfer gear;
the first brake disposed between the second rotation element and the transmission housing; and
the second brake disposed between the fo

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lee Chang Wook
• Seo Kangsoo
• Noh Myonghoon
• Kook Jae Chang
• Lee Hyukjun
• Park Jongsool

Classifications

• F16H57/023

  Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly · CPC title

• F16H3/66 Primary

  composed of a number of gear trains without drive passing from one train to another · CPC title

• F16H2200/2041

  with four engaging means · CPC title

• F16H2200/2007

  with two sets of orbital gears · CPC title

• F16H3/44 Primary

  using gears having orbital motion · CPC title