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Multi-speed planetary transmission

  • US 10,337,590 B2
  • Filed: 11/22/2017
  • Issued: 07/02/2019
  • Est. Priority Date: 09/28/2016
  • Status: Active Grant
First Claim
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1. A transmission comprising:

  • at least one stationary member;

    an input member rotatable relative to the at least one stationary member;

    a plurality of planetary gearsets operatively coupled to the input member, each of the plurality of planetary gearsets including a first gearset component, a second gearset component, and a third gearset component, the plurality of planetary gearsets including a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset, wherein the second gearset component of the second planetary gearset is fixedly coupled to the at least one stationary member;

    an output member operatively coupled to the input member through the plurality of planetary gearsets and rotatable relative to the at least one stationary member, the output member is fixedly coupled to the third gearset component of the fourth planetary gearset;

    a first interconnector which fixedly couples the third gearset component of the second planetary gearset to the second gearset component of the fourth planetary gearset;

    a second interconnector which fixedly couples the third gearset component of the third planetary gearset to the first gearset component of the fourth planetary gearset;

    a third interconnector which fixedly couples the second gearset component of the first planetary gearset to the first gearset component of the third planetary gearset; and

    a plurality of selective couplers, wherein the plurality of selective couplers includes;

    a first selective coupler which, when engaged, fixedly couples the second gearset component of the first planetary gearset and the first gearset component of the third planetary gearset to the at least one stationary member;

    a second selective coupler which, when engaged, fixedly couples the first gearset component of the first planetary gearset to the at least one stationary member;

    a third selective coupler which, when engaged, fixedly couples the third gearset component of the first planetary gearset to the second gearset component of the fourth planetary gearset and the third gearset component of the second planetary gearset;

    a fourth selective coupler which, when engaged, fixedly couples the second gearset component of the third planetary gearset to the second gearset component of the fourth planetary gearset and the third gearset component of the second planetary gearset;

    a fifth selective coupler which, when engaged, fixedly couples the second gearset component of the first planetary gearset and the first gearset component of the third planetary gearset to one of the second gearset component of the third planetary gearset and the third gearset component of the third planetary gearset; and

    a sixth selective coupler which, when engaged, fixedly couples the first gearset component of the first planetary gearset to the first gearset component of the second planetary gearset.

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