Patent ID: 9315232
Filing Date: 2016-04-19
CPC Classification: B62K,B62M,F16H

Claim Text:
1. A transmission for changing a rotational speed of wheel, comprising: a first driving source configured to provide a rotational force and having a first input shaft; a second driving source configured to provide the rotational force and having a second input shaft; a planetary gear unit including a sun gear, a planetary gear and a ring gear, the sun gear being connected to the first input shaft, the ring gear being connected to the second input shaft, and the planetary gear being connected to an output shaft; a first one-way clutch disposed between the first driving source and the planetary gear unit to allow the first input shaft to be rotated in only a first direction while mechanically restraining a rotation thereof in an opposite direction to the first direction; and a second one-way clutch disposed between the second driving source and the planetary gear unit so as to allow the second input shaft to be rotated in only a second direction while mechanically restraining a rotation thereof in an opposite direction to the second direction, wherein the first direction and the second direction are set such that the output shaft of the planetary gear unit is rotated in the same direction, and wherein the first and second one-way clutches allow both the sun and ring gears to rotate in the same direction when the first and second input shafts rotate in the first and second directions respectively.