MAL friction safety coupling is also called torque-limiting coupling. The main structure is a double-row roller chain coupling and friction transmission device. It is a type of flexible safety coupling with elastic elements. Relative sliding can occur between the sprocket and the friction plate to play a safety protection role. The torque is determined according to the compression of the disc spring. The MAL friction safety coupling can be used for transmission in a coaxial system, or it can be used in a parallel shaft system with a single-row chain, with the same performance.

Several groups of diaphragms (stainless steel thin plates) are alternately connected with the two halves of the coupling with bolts. Each group of diaphragms is composed of several stacked ones. The diaphragms are divided into connecting rod type and different shape of the whole piece type.The diaphragm coupling relies on the elastic deformation of the diaphragm to compensate for the relative displacement of the two shafts connected. It is a high-performance flexible coupling with strong metal components. It does not require lubrication, and has a compact structure, high strength and long service life. , No rotation gap, not affected by temperature and oil pollution, with acid resistance, alkali resistance and corrosion resistance, suitable for high temperature, high speed, and corrosive medium operating conditions.

The elastic sleeve pin coupling uses a pin with an elastic sleeve (rubber material) on one end, which is installed in the flange hole of the two halves of the coupling to realize the connection of the two halves of the coupling.The elastic sleeve pin coupling was once the most widely used coupling in our country. It was formulated as the standard of the Ministry of Machinery in the late 20s. The JB50-08 elastic ring pin coupling was the first in my country. Standard coupling.