Material vehicle, traction apparatus and system, and method for controlling bidirectional traveling of material vehicle

A material vehicle system, at least comprising a material vehicle and a traction apparatus, wherein

• the material vehicle comprises a first vehicle body, an unlocking assembly, a plurality of front universal wheels and a plurality of rear universal wheels, the unlocking assembly, the plurality of front universal wheels and the plurality of rear universal wheels are connected to a bottom of the vehicle body, and the plurality of front universal wheels and the plurality of rear universal wheels are in a locked state, wherein
• the vehicle body is configured to place a target object;
• the unlocking assembly is configured to unlock the plurality of front universal wheels from the locked state in a horizontal rotation direction, and drive the material vehicle to travel in a first direction through the plurality of front universal wheels;
• and
• the unlocking assembly is further configured to unlock the plurality of rear universal wheels from the locked state in the horizontal rotation direction, and drive the material vehicle to travel in a second direction through the plurality of rear universal wheels, and the first direction is opposite to the second direction;
• and
• the traction apparatus comprises a second vehicle body and a traction assembly connected to a top of the vehicle body;
• the traction apparatus is configured to:
• after engaging with the material vehicle,
• tow the material vehicle to travel in the first direction;
• and
• tow the material vehicle to travel in the second direction after turning around by rotating in a bottom space of the material vehicle.

A method for controlling a bidirectional travelling of a material vehicle, applied to a material vehicle system comprising a traction apparatus and the material vehicle, the material vehicle at least comprising an unlocking assembly, a plurality of front universal wheels and a plurality of rear universal wheels, wherein the plurality of front universal wheels and the plurality of rear universal wheels are in a locked state;

• and the method comprises:
• controlling the traction apparatus to establish a tractive connection with the material vehicle and controlling the traction apparatus to travel in a target direction;
• and
• in response to the traction apparatus travelling in the target direction, controlling the unlocking assembly to unlock a plurality of target universal wheels from the locked state in a horizontal rotation direction, to enable the traction apparatus to drive the material vehicle to travel in the target direction, wherein
• the plurality of target universal wheels are the plurality of front universal wheels when the target direction is a first direction, and the plurality of target universal wheels are the plurality of rear universal wheels when the target direction is a second direction, and the first direction is opposite to the second direction.