Transmission device, electric vehicle comprising device, and method for driving device

A transmission device capable of cooperating with a dual-power source, the dual-power source including an input shaft, wherein the transmission device comprises:

• a planetary gear assembly driven by the dual-power source, the planetary gear assembly includes a sun gear, a rotating inner ring gear and a planetary gear engaged between the sun gear and the rotating inner ring gear;
• the input shaft is connected with the sun gear, wherein the rotating inner ring gear includes a tooth surface and a parallel gear;
• the dual-power source is configured to drive the sun gear to rotate in a first direction with respect to its own rotation axis through the input shaft;
• the dual-power source is connected with the rotating inner ring gear and drives the rotating inner ring gear to rotate in a second direction opposite to the first direction with respect to its own rotation axis, at the same time, the planetary gear rotates in the second direction with respect to its own rotation axis;
• the rotation direction of the planetary gear around the input shaft depends on the linear speed V1 of pitch circle motion of the rotating inner ring gear and the linear speed V2 of pitch circle motion of the sun gear;
• wherein the dual-power source includes a first power source and a second power source;
• the first power source is configured to drive the sun gear through the input shaft;
• the second power source is configured to drive the rotating inner ring gear;
• a sun wheel front gear is arranged on the input shaft;
• an input shaft gear driven by the first power source is engaged with the sun wheel front gear to drive the sun gear;
• the input shaft is arranged to pass through the rotating inner ring gear;
• and
• the sun gear is located on one side of the rotating inner ring gear and the sun wheel front gear is located on another side of the rotating inner ring gear, wherein the sun gear is connected with the sun wheel front gear through the input shaft only;
• wherein, in an axial direction along the input shaft, the sun wheel front gear is disposed between the rotating inner ring gear and the first power source and between the rotating ring gear and the second power source;
• and
• wherein the tooth surface and the parallel gear are separated in the axial direction along the input shaft, and the parallel gear is disposed between the sun gear and the sun gear front gear in the axial direction along the input shaft.