Planetary gear train of automatic transmission for vehicle
First Claim
1. A planetary gear train of an automatic transmission for a vehicle, comprising:
- a first planetary gear set having first, second, and third rotational elements;
a second planetary gear set having fourth, fifth, and sixth rotational elements;
a third planetary gear set having seventh, eighth, and ninth rotational elements;
an input shaft mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft; and
an output shaft disposed in parallel with the input shaft and provided with an output gear at an external circumference of the output shaft;
a first shaft fixedly connected with the first rotational element and selectively acting as a fixed element;
a second shaft fixedly connected with the second rotational element and the sixth rotational element and selectively acting as a fixed element;
a third shaft fixedly connected with the third rotational element and the seventh rotational element and configured to selectively mesh with the output shaft;
a fourth shaft fixedly connected with the fourth rotational element and the input shaft;
a fifth shaft fixedly connected with the fifth rotational element and selectively connected with the first shaft and the third shaft respectively;
a sixth shaft fixedly connected with the eighth rotational element and selectively connected with the input shaft;
a first transfer gear configured to selectively deliver a torque between the third shaft and the output shaft; and
a second transfer gear configured to selectively deliver a torque between the output shaft and the ninth rotational element of the third planetary gear set.
1 Assignment
0 Petitions
Accused Products
Abstract
Ten or more forward speeds and two or more reverse speed are achieved by a planetary gear train of an automatic transmission that includes three planetary gear sets mounted on an input shaft, an output shaft disposed in parallel with the input shaft and having an output gear. The transmission further includes six shafts respectively interconnecting corresponding elements among the input shaft and rotational elements of the three planetary gear sets, a first transfer gear selectively delivering torque between one of the six shafts and the output shaft; and a second transfer gear selectively delivering torque between the output shaft and one rotational element of the third planetary gear set.
11 Citations
11 Claims
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1. A planetary gear train of an automatic transmission for a vehicle, comprising:
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a first planetary gear set having first, second, and third rotational elements; a second planetary gear set having fourth, fifth, and sixth rotational elements; a third planetary gear set having seventh, eighth, and ninth rotational elements; an input shaft mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft; and an output shaft disposed in parallel with the input shaft and provided with an output gear at an external circumference of the output shaft; a first shaft fixedly connected with the first rotational element and selectively acting as a fixed element; a second shaft fixedly connected with the second rotational element and the sixth rotational element and selectively acting as a fixed element; a third shaft fixedly connected with the third rotational element and the seventh rotational element and configured to selectively mesh with the output shaft; a fourth shaft fixedly connected with the fourth rotational element and the input shaft; a fifth shaft fixedly connected with the fifth rotational element and selectively connected with the first shaft and the third shaft respectively; a sixth shaft fixedly connected with the eighth rotational element and selectively connected with the input shaft; a first transfer gear configured to selectively deliver a torque between the third shaft and the output shaft; and a second transfer gear configured to selectively deliver a torque between the output shaft and the ninth rotational element of the third planetary gear set. - View Dependent Claims (2, 3, 4, 5)
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6. A planetary gear train of an automatic transmission for a vehicle, comprising:
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a first planetary gear set having first, second, and third rotational elements; a second planetary gear set having fourth, fifth, and sixth rotational elements; a third planetary gear set having seventh, eighth, and ninth rotational elements; an input shaft mounted with the first, second, and third planetary gear sets at an external circumference of the input shaft; and an output shaft disposed in parallel with the input shaft and provided with an output gear at an external circumference of the output shaft; a first shaft fixedly connected with the first rotational element and selectively acting as a fixed element; a second shaft fixedly connected with the second rotational element and the sixth rotational element and selectively acting as a fixed element; a third shaft fixedly connected with the third rotational element and the seventh rotational element and configured to selectively mesh with the output shaft; a fourth shaft fixedly connected with the fourth rotational element and the input shaft; a fifth shaft fixedly connected with the fifth rotational element and selectively connected with the first shaft and the third shaft respectively; a sixth shaft fixedly connected with the eighth rotational element and the input shaft; a first transfer gear configured to selectively deliver a torque between the third shaft and the output shaft; and a second transfer gear configured to selectively deliver a torque between the output shaft and the ninth rotational element of the third planetary gear set. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification