Patent ID: 9702438
Date: 2017-07-11
CPC Classifications: B60Y,F16H

Claim:
1. A two-speed transmission comprising: a first planetary gearbox including a sun including at least one sun gear, a ring including at least one ring gear, first planet gears meshed with the sun and the ring, a first planet carrier operatively supporting the first planet gears, the first planet carrier being an input of the two-speed transmission; a second planetary gearbox including the sun and the ring in common with the first planetary gearbox, second planet gears meshed with the sun and the ring, and a second planet carrier operatively supporting the second planet gears, the second planet carrier being an output of the two-speed transmission; a sun brake for braking the sun; and a ring brake for braking the ring; wherein at least one of the sun and the ring includes two gears connected together, the two gears having different diameters for the transmission to have at least two speed ratios; and wherein, a first of the speed ratios between the input and the output is provided by actuating the sun brake and by releasing the ring brake, and a second of the speed ratios, different than the first speed ratio, is provided by actuating the ring brake and by releasing the sun brake.