Vending machine motor drive frames generally use high-strength steel and wear-resistant steel, because the pressure to be borne by this part is very large, the joint part will often be worn, if you use ordinary steel, it is easy to have problems. The boom rod is a member with an unclosed shape of the cross street section, such as angle steel and I-beam. Closed thin arm rods are members with closed shapes, such as seamless steel pipes. The equal-arm lever can not change the size of the force, but when changing the direction of the force, the direction change is relatively single, and there is no fixed pulley flexibility.

Moreover, the point of action of the force cannot be changed arbitrarily, and if it changes, it may affect the force arm, so that the lever may no longer wait for the arm. A kind of lever, the length of the power arm and the resistance arm are the same, there are no specific advantages and disadvantages, and the main feature is that it is neither labor-saving nor laborious, and neither saves distance nor distance. The role of one heavy object can be replaced by the action of several evenly distributed weights, as long as the position of the center of gravity remains unchanged. Instead, several evenly distributed weights can be replaced with one weight suspended at their center of gravity.