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Conveyor belts can be driven from the head or the tail; some also have intermediate drives. The frame at the head of the conveyor belt bears the greatest load, so the driving mechanism is installed there, while the tail end has the driving mechanism that operates passively. So what device do we use to identify the head and tail of a belt conveyor? The head frame can be of the following three types: (1) Standard head frame, which is commonly used in small belt conveyors; it has a simple structure and is used to support the head of the drive roller, as well as the discharge baffle and discharge chute ； (2) Head frame with a surface-enlarging roller; compared to the common design, this arrangement provides additional support for the surface-enlarging roller ； (3) For the head frame of the double-drum drive conveyor, the first three bags of plastic drums in the frame are supported by baffles, discharge chutes, and outer rubber strips; when the head frame is large, an internal rubber conveyor belt cleaner can be used for cleaning ； The structure of the triangular frame is specifically designed based on the stress conditions experienced by the supports of belt conveyor drive units. It features a simple structure, as well as good stress distribution and stability, making it particularly suitable for large-scale belt conveyors ； Tail frames can be divided into the following three types: (1) Standard tail frames, which are commonly used in small conveyors; they have a simple structure and are used to support the drums as well as the metal wire mesh guards surrounding them ； (2) A tail frame equipped with an additional surface roller: when the diameter of the tail roller is larger than the distance between the forward and return belts, resulting in higher tension on the conveyor belt at the tail, it is necessary to add a rear surface to this roller. If no such surface roller is installed, it will have an impact on the belt in the return direction; moreover, the conveyor belt will place a load on the trough idlers located in that area, and this load may exceed the bearing capacity of those idlers. A smaller diameter can cause the industrial conveyor belt to bend, thereby affecting its lifespan. Increasing the height of the parallel idler sets can serve as a substitute for the additional surface roller, but this will increase the complexity of the arrangement of the parallel buffer idlers and also lead to a greater degree of non-standardization in the related frame components ； (3) Tail frames with horizontal tensioning at the rear; some conveyors are equipped with tensioning devices on their rear rollers. This means that the rear rollers are tightened by means of drums. There are two types of such tail frames, and their layout is determined by certain requirements. Belt conveyors often need to suddenly change the direction of the conveyor belt in the vertical plane. For example, when there is vertical tensioning, screw tensioning, or fixed unloading, and the direction of conveyance needs to be changed, the direction of the rubber conveyor belt can be altered by using redirecting rollers of appropriate diameter. The strength of the frames at these positions must be sufficient to support the redirecting rollers; in our technical terminology, this is referred to as a redirecting roller support frame.