How to arrange the caster wheel and the direction wheel on the trolley is reasonable (who should be in front), please give a specific explanation, it is better to analyze it from the mechanical principle.
The front is the alignment wheel, and the rear caster is more reasonable.
The front is a directional wheel, and the force required to adjust the direction of the arm is smaller when walking in a straight line.Cornering is more flexible.
The rear caster mainly controls the direction, and the required torque is smaller in the changing direction. Therefore, turning is more labor-saving.
Without special requirements, the universal wheels are placed on the side of the handle, otherwise they can not be turned at high load
