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US 2026/0217331 A1Published application
Dual-motor strain wave gear continuously variable transmission
AssigneeFox Factory, Inc.
InventorsWilliam O. Brown, IV, Bjorn Borgers
Life of this patent
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AssigneeFox Factory, Inc.
InventorsWilliam O. Brown, IV, Bjorn Borgers
Estimating the term…
An electric bicycle or other electric vehicle includes a frame, a wheel coupled to the frame, and a continuously variable transmission system mounted to the frame. The continuously variable transmission system includes a first motor, a second motor, and a strain wave gear mechanism operatively connected to both the first motor and the second motor. The strain wave gear mechanism includes a circular spline driven by the first motor, a wave generator driven by the second motor, and a flexspline configured to output power to the wheel. A controller independently controls the first motor and the second motor to achieve a desired reduction ratio. The first motor is operatively connected to the circular spline via a pinion gear. The strain wave gear mechanism can be integrated into a drive unit or gearbox positioned relative to a pedal crank assembly of the electric bicycle.
An electric bicycle, comprising:
A continuously variable transmission (CVT) system, comprising:
A continuously variable transmission (CVT) system, comprising:
Dependencies are inferred from the claim text.