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PLANETARY GEAR TRAIN OF AUTOMATIC TRANSMISSION FOR VEHICLE

  • US 20170219056A1
  • Filed: 09/14/2016
  • Published: 08/03/2017
  • Est. Priority Date: 02/03/2016
  • Status: Active Grant
First Claim
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1. A planetary gear train of an automatic transmission for a vehicle, comprising:

  • a first planetary gear set including a first rotation element, a second rotation element, and a third rotation element;

    a second planetary gear set including a fourth rotation element, a fifth rotation element, and a sixth rotation element;

    a third planetary gear set including a seventh rotation element, an eighth rotation element, and a ninth rotation element;

    a fourth planetary gear set including a tenth rotation element, an eleventh rotation element, and a twelfth rotation element;

    an input shaft mounted with the first and second planetary gear sets at an external circumference of the input shaft;

    an output shaft disposed in parallel with the input shaft and mounted with the third and fourth planetary gear sets on an external circumference of the output shaft;

    a first shaft connected with the first rotation element;

    a second shaft interconnecting the second rotation element and the sixth rotation element;

    a third shaft connected with the third rotation element and directly connected with the input shaft;

    a fourth shaft connected with the fourth rotation element;

    a fifth shaft connected with the fifth rotation element;

    a sixth shaft connecting the seventh rotation element and the tenth rotation element, and gear-meshed with the fourth shaft;

    a seventh shaft connected with the eighth rotation element and engaged with the third shaft selectively;

    an eighth shaft interconnecting the ninth rotation element and the eleventh rotation element and directly connected with the output shaft;

    a ninth shaft connected with the twelfth rotation element; and

    transfer gears each gear-meshed with at least one of the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth shafts.

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