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 along an external circumference of the output shaft;
a first shaft fixedly connected to the first rotation element and the fourth rotation element;
a second shaft fixedly connected to the second rotation element and the ninth rotation element;
a third shaft fixedly connected to the third rotation element and the input shaft;
a fourth shaft fixedly connected to the fifth rotation element;
a fifth shaft fixedly connected to the sixth rotation element;
a sixth shaft fixedly connected to the seventh rotation element;
a seventh shaft fixedly connected to the eighth rotation element;
an eighth shaft fixedly connected to the tenth rotation element and externally gear-engaged with the fifth shaft;
a ninth shaft fixedly connected to the eleventh rotation element and the output shaft;
a tenth shaft fixedly connected to the twelfth rotation element, and externally gear-engaged with the seventh shaft; and
two transfer gears each forming external gear-engagement between a corresponding pair among the first to tenth shafts.
1 Assignment
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Accused Products
Abstract
A planetary gear train 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, first shaft connected to the first and fourth elements, second shaft connected to the second and ninth elements, third shaft connected to the third element and the input shaft, fourth, fifth, sixth, and seventh shaft connected to the fifth, sixth, seventh, and eighth elements respectively, eighth shaft connected to the tenth element and externally gear-meshed with the fifth shaft, ninth shaft connected to the eleventh element and the output shaft, tenth shaft connected to the twelfth element, and externally gear-meshed with the seventh shaft, and two transfer gears each forming external gear-engagement between a corresponding pair of shafts.
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Citations
21 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 along an external circumference of the output shaft; a first shaft fixedly connected to the first rotation element and the fourth rotation element; a second shaft fixedly connected to the second rotation element and the ninth rotation element; a third shaft fixedly connected to the third rotation element and the input shaft; a fourth shaft fixedly connected to the fifth rotation element; a fifth shaft fixedly connected to the sixth rotation element; a sixth shaft fixedly connected to the seventh rotation element; a seventh shaft fixedly connected to the eighth rotation element; an eighth shaft fixedly connected to the tenth rotation element and externally gear-engaged with the fifth shaft; a ninth shaft fixedly connected to the eleventh rotation element and the output shaft; a tenth shaft fixedly connected to the twelfth rotation element, and externally gear-engaged with the seventh shaft; and two transfer gears each forming external gear-engagement between a corresponding pair among the first to tenth shafts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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 along an external circumference of the output shaft, wherein the first rotation element is fixedly connected to the fourth rotation element, the second rotation element is fixedly connected to the ninth rotation element, the third rotation element is fixedly connected to the input shaft, the sixth rotation element is externally gear-engaged with the tenth rotation element, the seventh rotation element is selectively connectable to the fourth rotation element or the fifth rotation element, respectively, the eighth rotation element is externally gear-engaged with the twelfth rotation element, and the eleventh rotation element is fixedly connected to the output shaft. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification