Planetary E-Drive Layout for Compact Multi-Gear Shifting

The patent combines two planetary gear sets (first and second planetary gear sets) into a single integrated transmission unit sharing common components such as the housing, input shaft, and output shaft. This merging approach enables multi-gear capability while reducing the overall number of separate components compared to using two independent gear sets, thereby improving adaptability while controlling device complexity.

The second planetary gear set is nested within the same housing as the first planetary gear set, with both gear sets sharing the same input and output shafts. This nested arrangement allows the transmission to achieve multiple gear ratios through different combinations of planetary gears and switch elements without requiring separate transmission units, thus improving multi-gear capability while minimizing installation space and reducing structural complexity.

The patent employs switch elements (claw coupling and freewheel coupling) that can dynamically change their engagement state based on rotational direction and torque requirements. These switch elements automatically engage or disengage depending on the operating conditions, enabling seamless gear switching without requiring complex control mechanisms, thus improving ease of operation while keeping the control system relatively simple.

The claw coupling and freewheel coupling are designed to automatically engage and disengage based on the direction of rotation and torque application. The switch elements self-regulate their engagement state without requiring external control signals, enabling automatic gear switching that improves ease of operation while minimizing the complexity of control systems.