Tool carrier comprising a wheel driving module, and tool carrier train

A tool carrier comprising:

• a support frame;
• and
• at least one driving module, mounted on the support frame, and the at least one driving module being configured to move the support frame along a driving direction, the at least one driving module comprising
• two wheels including a front wheel and a rear wheel,
• at least one motor assembly which is configured to drive at least one wheel among the front wheel and the rear wheel,
• at least one engaging system which is configured to engage the at least one wheel with the motor assembly or disengage the at least one wheel from the motor assembly, and
• at least one bogie mounted on the support frame, the front wheel and the rear wheel being mounted on the at least one bogie.

A tool carrier comprising:

• a support frame;
• and
• three driving modules, mounted on the support frame, and the three driving modules being configured to move the support frame along a driving direction, the three driving modules being disposed around the support frame every 120° around the driving direction, each of the three driving modules comprising
• two wheels including a front wheel and a rear wheel,
• at least one motor assembly which is configured to drive at least one wheel among the front wheel and the rear wheel, and
• at least one engaging system which is configured to engage the at least one wheel with the motor assembly or disengage the at least one wheel from the motor assembly.