Patent ID: 9732844
Date: 2017-08-15
CPC Classifications: B60L,F16H

Claim:
1. A transmission apparatus which changes speed between an input terminal and an output terminal, comprising: a sun gear connected to the input terminal; a plurality of first planetary gears circumscribed and engaged with the sun gear; a plurality of second planetary gears, each second planetary gear configured to combine with each first planetary gear and share rotary shafts with each of the first planetary gears; a first ring gear circumscribed and engaged with the first planetary gears and connected to an output shaft; a second ring gear circumscribed and engaged with the second planetary gear; a cage configured to support the rotary shafts of the first and second planetary gears such that the first planetary gears and the second planetary gears are revolved about the sun gear; and first and second brake members, wherein the first and second brake members act on the second ring gear and on the cage so as to control rotation of the second ring gear and rotation of the cage.