1. Since the transmission belt has good elasticity, it can alleviate the impact and absorb the vibration, and the transmission is stable and noise-free.
2. With the pulley, the motion and power are transmitted by friction. Therefore, when it is overloaded, it will slip on the rim, which can avoid damage of other parts and play a role of safety protection, but the transmission efficiency is low and the service life is short. ;
3. The shaft and bearing are subjected to a large pressure;
4. It is suitable for occasions where the center distance between the two shafts is large, but the outer dimensions are large;
5. It is not suitable for high temperature and flammable and explosive substances;
The type of transmission can be divided into flat conveyor belt drive, V-belt drive, circular conveyor drive and synchronous belt drive;
The flat belt has a rectangular cross section. Commonly used are rubber canvas belts, leather belts, cotton belts and chemical fiber belts. The flat belt drive is mainly used for the parallel transmission of the two pulley axes, including open transmission and cross transmission. Wait;
Open drive, the two pulleys have the same steering, more applications;
Cross-drive, the opposite of the two pulleys, the drive belt is easy to wear;
The cross-section of the V-belt is trapezoidal. The V-belt drive is to fit the V-belt in the trapezoidal groove on the pulley, so that the two sides of the V-belt are pressed against the two sides of the pulley, thereby generating friction. In order to transmit motion and power, under the same conditions, the V-shaped belt drive has a higher friction than the flat belt drive. Due to the wedge-shaped friction principle, the transmission capacity of the V-belt is three times that of the flat belt, so the transmission of the V-belt transmission is better. Large load, so it has been widely used;
The round belt is made of commonly used leather, and also has a round rope belt and a round nylon belt. They are all circular in cross section, and the transmission is only suitable for low-speed, light-load machinery, such as sewing machine, vacuum cleaner, and reel drive mechanism. Wait;
Synchronous belt transmission relies on the teeth measured in the belt to mesh with the teeth of the pulley to transmit motion and power. Because the wire rope is deformed by the load, the deformation is extremely small, and the meshing transmission is transmitted, so the transmission of the synchronous belt transmission is relatively accurate;
The V-belts are made of a jointless ring, which is composed of a wrap layer, a stretch layer, a strength layer and a compression layer. The cloth layer is mostly made of rubber canvas, which is the protective layer of the V-shaped transmission belt. The stretching layer and the compression layer are mainly composed of rubber. When the tape is bent on the pulley, it can be separately stretched and compressed, and the strength layer is composed of several layers of cotton cord. Or a layer of wire rope to bear the basic tension, the standard V-belt of the V-shaped tape belongs to the standard parts category; according to the size of the cross-section, the V-shaped triangular tape is divided into O, A, B, C, There are seven types of D, E and F; the inner circumference of the V-belt is called the nominal length, and the length of the neutral layer of the V-belt is called the length of the pitch line. For example, "B2400" means that the V-type transmission belt is of type B, and the inner circumference is 2400mm. .