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Multiple speed transmission with integrated low range

  • US 10,001,197 B2
  • Filed: 06/09/2015
  • Issued: 06/19/2018
  • Est. Priority Date: 09/14/2012
  • Status: Active Grant
First Claim
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1. A transmission comprising:

  • an input shaft;

    an output shaft;

    a first gearing arrangement configured to fixedly constrain the input shaft to rotate at a speed between speeds of a first element and a second element;

    a second gearing arrangement configured to fixedly constrain the output shaft to rotate at a speed between speeds of a third element and a fourth element;

    a third gearing arrangement configured to fixedly constrain the fourth element to rotate at a speed between zero and a speed of a sixth element, the third gearing arrangement comprising a first simple planetary gear set having a first sun gear as the sixth element, a first planet carrier fixedly coupled to the fourth element, a first ring gear fixedly held against rotation, and a first plurality of planet gears supported for rotation relative to the first planet carrier and in continuous meshing engagement with both the first sun gear and the first ring gear;

    a fourth gearing arrangement configured to selectively constrain the output shaft to rotate at a speed between speeds of the third element and the second element; and

    a first clutch selectively coupling the sixth element to the input shaft.

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