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Continuously variable transmission

  • US 9,341,246 B2
  • Filed: 04/28/2014
  • Issued: 05/17/2016
  • Est. Priority Date: 11/22/2005
  • Status: Active Grant
First Claim
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1. A continuously variable transmission for integrating within a frame of a bicycle, comprising:

  • a planetary gear set comprisinga planet carrier coupled to a set of planet gears, the planet carrier being configured for receiving a torque input from a set of cranks,a fixed ring gear, anda sun gear coaxial with a crankshaft of the bicycle, wherein rotation of the planet gears drives the sun gear; and

    a variator, comprisingan input ring coupled to the sun gear via an axial force generation mechanism comprising a cam loader having a set of bearings in contact with a set of ramps,a plurality of tiltable traction planets arranged about the crankshaft of the bicycle, each tiltable traction planet being in contact with the input ring,an output ring gear, operationally coupled to the plurality of traction planets and coaxial with the crankshaft of the bicycle,a cage, andan idler in contact with the plurality of tiltable traction planets.

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