Driving mode switching device for electric gear box

A driving mode switching device for an electric gear box, comprising:

• a housing having an inner space defined therein;
• a first active gear and a second active gear located in the inner space, the first and second active gears being co-axially connected with each other on a first shaft, a passive gear co-axially disposed with a transmission gear for rotation therewith, the passive gear being displaceable between axially displaced engaged and disengaged positions with respect to the second active gear, the passive gear being resiliently biased to one of the engaged and disengaged positions;
• a motor unit having an output shaft located in the inner space, a toothed portion defined at an end of the output shaft and engaged with the first active gear, the motor unit driving the output shaft and the toothed portion driving the first active gear to responsively drive the second active gear;
• and
• a clutch member extending into the inner space, the clutch member being displaceable to selectively displace the passive gear between the engaged and disengaged positions relative to the second active gear.