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Multi-speed planetary transmission

  • US 10,316,940 B2
  • Filed: 09/28/2016
  • Issued: 06/11/2019
  • 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, the input member is fixedly coupled to the first gearset component of the second planetary gearset;

    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;

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

    a second interconnector which fixedly couples the second gearset component of the first planetary gearset, the second gearset component of the second planetary gearset, and the third gearset component of the third planetary gearset together, the third gearset component of the third planetary gearset is a first ring gear;

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

    a plurality of selective couplers including a first number of clutches and a second number of brakes, the second number being greater than the first number, wherein the second planetary gearset comprises a plus planetary gearset.

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