Planetary gear train of automatic transmission for vehicle
First Claim
1. A planetary gear train apparatus of an automatic transmission for a vehicle, the apparatus comprising:
- a first planetary gear set having a first rotation element, a second rotation element, and a third rotation element;
a second planetary gear set having a fourth rotation element, a fifth rotation element, and a sixth rotation element;
a third planetary gear set having a seventh rotation element, an eighth rotation element, and a ninth rotation element;
a fourth planetary gear set having a tenth rotation element, an eleventh rotation element, and a twelfth rotation element;
an input shaft mounted with the first, second, and third planetary gear sets along an external circumference of the input shaft;
an output shaft disposed in parallel with the input shaft and mounted with the fourth planetary gear set on an external circumference of the output shaft,a first shaft fixedly connected to the first rotation element and the sixth rotation element;
a second shaft fixedly connected to the second rotation element and the ninth rotation element, and fixedly connected to the input shaft;
a third shaft fixedly connected to the third rotation element;
a fourth shaft fixedly connected to the fourth rotation element and the seventh rotation element;
a fifth shaft fixedly connected to the fifth rotation element;
a sixth shaft fixedly connected to the eighth rotation element;
a seventh shaft fixedly connected to the tenth rotation element, and externally gear-engaged with the fifth shaft;
an eighth shaft fixedly connected to the eleventh rotation element, externally gear-engaged with the sixth shaft selectively, and fixedly connected to the output shaft;
a ninth shaft fixedly connected to the twelfth rotation element; and
two transfer gears each forming external gear-engagement between a corresponding pair among the first to ninth shafts.
1 Assignment
0 Petitions
Accused Products
Abstract
A planetary gear train of an automatic transmission may include first to fourth planetary gear sets having first to third, fourth to sixth, seventh to ninth, and eighth to twelfth elements, the first to third gear sets being mounted on an input shaft, the fourth gear set being mounted on an output shaft, a first shaft connected to first and sixth elements, a second shaft connected to second and ninth elements and input shaft, a fourth shaft connected to fourth and seventh elements, third, fifth, and sixth shafts connected to third, fifth, and eighth elements respectively, a seventh shaft connected to tenth element, and externally gear-meshed with fifth shaft, an eighth shaft connected to eleventh element and output shaft, and externally gear-meshed with sixth shaft selectively, a ninth shaft connected to the twelfth element, and two transfer gears each forming external gear-engagement between a corresponding pair of shafts.
9 Citations
13 Claims
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1. A planetary gear train apparatus of an automatic transmission for a vehicle, the apparatus comprising:
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a first planetary gear set having a first rotation element, a second rotation element, and a third rotation element; a second planetary gear set having a fourth rotation element, a fifth rotation element, and a sixth rotation element; a third planetary gear set having a seventh rotation element, an eighth rotation element, and a ninth rotation element; a fourth planetary gear set having a tenth rotation element, an eleventh rotation element, and a twelfth rotation element; an input shaft mounted with the first, second, and third planetary gear sets along an external circumference of the input shaft; an output shaft disposed in parallel with the input shaft and mounted with the fourth planetary gear set on an external circumference of the output shaft, a first shaft fixedly connected to the first rotation element and the sixth rotation element; a second shaft fixedly connected to the second rotation element and the ninth rotation element, and fixedly connected to the input shaft; a third shaft fixedly connected to the third rotation element; a fourth shaft fixedly connected to the fourth rotation element and the seventh rotation element; a fifth shaft fixedly connected to the fifth rotation element; a sixth shaft fixedly connected to the eighth rotation element; a seventh shaft fixedly connected to the tenth rotation element, and externally gear-engaged with the fifth shaft; an eighth shaft fixedly connected to the eleventh rotation element, externally gear-engaged with the sixth shaft selectively, and fixedly connected to the output shaft; a ninth shaft fixedly connected to the twelfth rotation element; and two transfer gears each forming external gear-engagement between a corresponding pair among the first to ninth shafts. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A planetary gear train apparatus of an automatic transmission for a vehicle, the apparatus comprising:
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a first planetary gear set having a first rotation element, a second rotation element, and a third rotation element; a second planetary gear set having a fourth rotation element, a fifth rotation element, and a sixth rotation element; a third planetary gear set having a seventh rotation element, an eighth rotation element, and a ninth rotation element; a fourth planetary gear set having a tenth rotation element, an eleventh rotation element, and a twelfth rotation element; an input shaft mounted with the first, second, and third planetary gear sets along an external circumference of the input shaft; and an output shaft disposed in parallel with the input shaft and mounted with the fourth planetary gear set on an external circumference of the output shaft, wherein the first rotation element is fixedly connected to the sixth rotation element, the second rotation element is fixedly connected to the ninth rotation element, and fixedly connected to the input shaft, the fourth rotation element is fixedly connected to the seventh rotation element, the third rotation element is selectively connectable to the seventh rotation element or the eighth rotation element, respectively, the fifth rotation element is externally gear-engaged with the tenth rotation element, the eighth rotation element is externally gear-engaged with the eleventh rotation element selectively, and the eleventh rotation element is fixedly connected to the output shaft. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification