Electric vehicle, automatic driving method and device, automatic freighting method and system

An electric vehicle comprising a plurality of wheel assemblies installed on a lower surface of a chassis, wherein:

• the plurality of the wheel assemblies are independent of each other, and each of the wheel assemblies comprises a wheel, a driving device and a displacement device;
• the driving device is configured to drive the wheel to rotate, and the displacement device is configured to drive at least the wheel to move in a width direction of a vehicle body of the electric vehicle;
• wherein the displacement device, the driving device and the wheel are sequentially arranged from inside to outside along the width direction of the vehicle body;
• the driving device is connected to and drives the wheel through a rotating shaft;
• the displacement device is connected to the driving device through a telescopic shaft, and the displacement device drives the driving device and the wheel through the telescopic shaft;
• when in each of the wheel assemblies, the wheel comprises a plurality of tires arranged along the width direction of the vehicle body, the plurality of the tires are connected to the driving device through the rotating shaft;
• wherein the displacement device comprises a first electric motor fixed to the chassis, a first end of the telescopic shaft is telescopically connected to the first electric motor, and a second end of the telescopic shaft is connected to the driving device;
• wherein the driving device comprises a housing fixed to the chassis and a second electric motor accommodated in the housing, two opposite inner walls of the housing are provided with guide rails extending in the width direction of the vehicle body, and two opposite side walls of the second electric motor are connected to the guide rails through rotating pivots, respectively;
• when driven by the first electric motor, the second electric motor slides in the guide rails through the rotating pivots, and drives the wheel to move in the width direction of the vehicle body;
• when the wheel jumps in a direction perpendicular to the chassis, the second electric motor is driven to swing by the wheel through the rotating pivots, and the rotating pivots are rotated in the guide rails along with swing of the second electric motor.